{"id":12212,"date":"2026-09-09T01:43:23","date_gmt":"2026-09-09T01:43:23","guid":{"rendered":"https:\/\/www.omch.com\/?p=12212"},"modified":"2026-09-09T06:09:18","modified_gmt":"2026-09-09T06:09:18","slug":"proximity-sensor-vs-photoelectric-sensor","status":"publish","type":"post","link":"https:\/\/www.omch.com\/vi\/proximity-sensor-vs-photoelectric-sensor\/","title":{"rendered":"C\u1ea3m bi\u1ebfn kho\u1ea3ng c\u00e1ch so v\u1edbi c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n: H\u00e3y \u0111\u1ec3 v\u1eadt li\u1ec7u, kho\u1ea3ng c\u00e1ch v\u00e0 t\u00edn hi\u1ec7u \u0111\u1ea7u ra quy\u1ebft \u0111\u1ecbnh"},"content":{"rendered":"\n\n \n \n C\u1ea3m bi\u1ebfn kho\u1ea3ng c\u00e1ch so v\u1edbi c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n: H\u00e3y \u0111\u1ec3 v\u1eadt li\u1ec7u, kho\u1ea3ng c\u00e1ch v\u00e0 t\u00edn hi\u1ec7u \u0111\u1ea7u ra quy\u1ebft \u0111\u1ecbnh<\/title>\n<\/head>\n<body>\n<!-- \u2193\u2193\u2193 The deployable fragment begins here. \u2193\u2193\u2193 -->\n<div class=\"bd-post\">\n <style>\n @import url('https:\/\/fonts.googleapis.com\/css2?family=Manrope:wght@400;600;700&family=Roboto:wght@600;700&display=swap');\n\n .bd-post {\n --prose-width: 720px;\n \/* FIXED prose spacing standard \u2014 IDENTICAL in every article (never re-derive): *\/\n --gap-attach: 16px; 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width: 18px; flex: none; margin-top: 1px; color: var(--accent-deep); }\n .bd-post .rich-checklist-li-ic svg { width: 18px; height: 18px; }\n .bd-post .rich-checklist-li-t { font-size: 15px; line-height: 1.5; color: var(--card-text); margin: 0; }\n .bd-post .rich-checklist-li-t strong { font-weight: 700; color: var(--heading-ink); }\n\n @media (prefers-reduced-motion: no-preference) {\n .bd-post .bd-post-article a { transition: color 0.2s ease-out, text-decoration-color 0.2s ease-out; }\n .bd-post .bp-cta-end-btn:hover { transform: translateY(-2px); }\n }\n\n @media (max-width: 767px) {\n .bd-post { padding: 16px; }\n .bd-post h1 { font-size: 26px; }\n .bd-post h2 { font-size: 26px; margin-top: 32px; }\n .bd-post h3 { font-size: 20px; margin-top: 24px; }\n .bd-post .rich-multicol { grid-template-columns: 1fr; gap: 0; }\n .bd-post .rich-multicol-col + .rich-multicol-col { border-left: 0; border-top: 1px solid var(--card-border); padding-left: 0; padding-top: 16px; }\n .bd-post .bp-1-stats-num { font-size: 30px; }\n .bd-post .bp-cta-end-title { font-size: 22px; }\n }\n @media (max-width: 600px) {\n .bd-post .bp-1-stats-ladder { grid-template-columns: repeat(2, 1fr); }\n .bd-post .bp-3-questions-grid { grid-template-columns: repeat(2, 1fr); }\n }\n\n\/* ---- References (canonical .bd-refs) ---- *\/\n.bd-post .bd-refs { margin: 0 0 1em; padding-left: 1.6em; }\n.bd-post .bd-refs li { font-size: 14px; line-height: 1.7; color: var(--text-secondary); margin-bottom: 10px; overflow-wrap: anywhere; }\n.bd-post .bd-refs li::marker { color: var(--accent-deep); }\n.bd-post .bd-refs li a { color: var(--accent-deep); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; overflow-wrap: anywhere; }\n.bd-post .bd-refs li a:hover { color: var(--heading-ink); }\n <\/style>\n <article class=\"bd-post-article\">\n\n <p>H\u00e3y h\u1ecfi m\u01b0\u1eddi nh\u00e0 cung c\u1ea5p gi\u1ea3i ph\u00e1p t\u1ef1 \u0111\u1ed9ng h\u00f3a xem c\u1ea3m bi\u1ebfn n\u00e0o \u201ct\u1ed1t h\u01a1n\u201d (c\u1ea3m bi\u1ebfn ti\u1ec7m c\u1eadn so v\u1edbi c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n), v\u00e0 b\u1ea1n s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c m\u01b0\u1eddi c\u00e2u tr\u1ea3 l\u1eddi \u0111\u1ea7y t\u1ef1 tin nh\u01b0ng m\u00e2u thu\u1eabn nhau. Thay v\u00e0o \u0111\u00f3, h\u00e3y h\u1ecfi ch\u00ednh chi\u1ebfc m\u00e1y, v\u00e0 tranh c\u00e3i \u0111\u00f3 h\u1ea7u nh\u01b0 s\u1ebd bi\u1ebfn m\u1ea5t. M\u1ed9t ch\u00f9m tia quang \u0111i\u1ec7n d\u00e0i 5 m kh\u00f4ng ph\u1ea3i l\u00e0 t\u1ed1t h\u01a1n m\u1ed9t c\u1ea3m bi\u1ebfn c\u1ea3m \u1ee9ng 5 mm; \u0111\u00f3 ch\u1ec9 l\u00e0 c\u00e2u tr\u1ea3 l\u1eddi kh\u00e1c nhau cho c\u00e1c \u0111i\u1ec3m ph\u00e1t hi\u1ec7n kh\u00e1c nhau. \u0110i\u1ec1u m\u00e0 h\u1ea7u h\u1ebft c\u00e1c b\u00e0i vi\u1ebft so s\u00e1nh th\u01b0\u1eddng b\u1ecf qua ch\u00ednh l\u00e0 th\u1ee9 t\u1ef1 c\u00e1c b\u01b0\u1edbc: hai lo\u1ea1i m\u00f4i tr\u01b0\u1eddng v\u1eadt l\u00fd v\u00e0 m\u1ed9t s\u1ed1 h\u1ea1n ch\u1ebf khi\u1ebfn m\u1ed9t trong hai lo\u1ea1i b\u1ecb lo\u1ea1i tr\u1eeb ngay t\u1eeb \u0111\u1ea7u, tr\u01b0\u1edbc khi b\u1ea1n so s\u00e1nh c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt. Th\u1ee9 t\u1ef1 n\u00e0y ch\u00ednh l\u00e0 n\u1ed9i dung m\u00e0 h\u01b0\u1edbng d\u1eabn n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o, v\u00e0 ch\u00ednh th\u1ee9 t\u1ef1 \u0111\u00f3 s\u1ebd quy\u1ebft \u0111\u1ecbnh c\u1ea3m bi\u1ebfn n\u00e0o th\u1ef1c s\u1ef1 ph\u00f9 h\u1ee3p v\u1edbi d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t c\u1ee7a b\u1ea1n.<\/p>\n\n <img decoding=\"async\" src=\"https:\/\/www.omch.com\/wp-content\/uploads\/2026\/09\/Photoelectric-Sensor-2.webp\" style=\"width: 512px; height: 384px; max-width: 100%; object-fit: cover; border-radius: 12px; margin: 30px auto; display: block; box-shadow: 10px 10px 60px 0px rgba(210, 221, 224, 0.35); transition: all 0.3s ease; cursor: pointer;\" onmouseover=\"this.style.transform='translateY(-5px) scale(1.03)'; this.style.boxShadow='15px 25px 80px 0px rgba(210, 221, 224, 0.45)'\" onmouseout=\"this.style.transform='translateY(0) scale(1)'; this.style.boxShadow='10px 10px 60px 0px rgba(210, 221, 224, 0.35)'\"> \n\n <h2>C\u1ea3m bi\u1ebfn kho\u1ea3ng c\u00e1ch v\u00e0 c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n: Hai t\u00ean g\u1ecdi, hai ph\u01b0\u01a1ng ti\u1ec7n v\u1eadt l\u00fd<\/h2>\n <p>Vi\u1ec7c \u0111\u1eb7t t\u00ean l\u00e0 c\u00e1i b\u1eaby \u0111\u1ea7u ti\u00ean, v\u00ec v\u1eady h\u00e3y lo\u1ea1i b\u1ecf n\u00f3 ngay t\u1eeb \u0111\u1ea7u. <strong>C\u1ea3m bi\u1ebfn kho\u1ea3ng c\u00e1ch<\/strong> hi\u1ec3u qua m\u1ed9t <strong>l\u0129nh v\u1ef1c v\u1eadt l\u00fd<\/strong>: tr\u01b0\u1eddng \u0111i\u1ec7n t\u1eeb (lo\u1ea1i c\u1ea3m \u1ee9ng), tr\u01b0\u1eddng t\u0129nh \u0111i\u1ec7n (lo\u1ea1i \u0111i\u1ec7n dung) ho\u1eb7c tr\u01b0\u1eddng t\u1eeb (lo\u1ea1i hi\u1ec7u \u1ee9ng Hall v\u00e0 lo\u1ea1i l\u00e1 kim). <strong>C\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n<\/strong> hi\u1ec3u r\u00f5 <strong>\u00e1nh s\u00e1ng<\/strong>: m\u1ed9t b\u1ed9 ph\u00e1t ph\u00e1t ra m\u1ed9t ch\u00f9m tia \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf, v\u00e0 m\u1ee5c ti\u00eau \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n khi n\u00f3 ph\u1ea3n x\u1ea1, c\u1ea3n tr\u1edf ho\u1eb7c ph\u1ea3n h\u1ed3i l\u1ea1i ch\u00f9m tia \u0111\u00f3.<\/p>\n <p>T\u1ea1i sao b\u1ea1n l\u1ea1i th\u1ea5y c\u1ee5m t\u1eeb \u201cc\u1ea3m bi\u1ebfn ti\u1ec7m c\u1eadn quang \u0111i\u1ec7n\u201d trong c\u00e1c danh m\u1ee5c s\u1ea3n ph\u1ea9m? B\u1edfi v\u00ec m\u1ed9t s\u1ed1 nh\u00e0 s\u1ea3n xu\u1ea5t coi c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n l\u00e0 m\u1ed9t nh\u00e1nh c\u00f3 ph\u1ea1m vi ho\u1ea1t \u0111\u1ed9ng xa c\u1ee7a c\u1ea3m bi\u1ebfn ti\u1ec7m c\u1eadn, trong khi nh\u1eefng nh\u00e0 s\u1ea3n xu\u1ea5t kh\u00e1c ch\u1ec9 d\u00e0nh thu\u1eadt ng\u1eef \u201cti\u1ec7m c\u1eadn\u201d cho c\u00e1c lo\u1ea1i c\u1ea3m bi\u1ebfn c\u1ea3m \u1ee9ng, \u0111i\u1ec7n dung v\u00e0 t\u1eeb t\u00ednh. \u0110\u00e2y l\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t trong c\u00e1ch ph\u00e2n lo\u1ea1i c\u1ee7a c\u00e1c nh\u00e0 cung c\u1ea5p, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 m\u1eb7t v\u1eadt l\u00fd. B\u00e0i vi\u1ebft n\u00e0y l\u1ea5y m\u00f4i tr\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng l\u00e0m ranh gi\u1edbi ph\u00e2n chia: m\u1ed9t b\u00ean l\u00e0 c\u1ea3m bi\u1ebfn d\u1ef1a tr\u00ean t\u1eeb tr\u01b0\u1eddng, b\u00ean kia l\u00e0 c\u1ea3m bi\u1ebfn d\u1ef1a tr\u00ean \u00e1nh s\u00e1ng.<\/p>\n <div class=\"rich-multicol\">\n <div class=\"rich-multicol-col\">\n <p class=\"rich-multicol-h\">D\u1ef1a tr\u00ean c\u1ea3m bi\u1ebfn t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng (c\u1ea3m \u1ee9ng \/ \u0111i\u1ec7n dung \/ t\u1eeb t\u00ednh)<\/p>\n <p class=\"rich-multicol-b\">C\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n m\u1ee5c ti\u00eau xuy\u00ean qua m\u00f4i tr\u01b0\u1eddng v\u1eadt l\u00fd. Ph\u1ea1m vi: milim\u00e9t. Ch\u1ea5t li\u1ec7u: c\u1ea3m \u1ee9ng = ch\u1ec9 kim lo\u1ea1i. H\u1ecfng h\u00f3c: khi c\u00f3 t\u1ea1p ch\u1ea5t x\u00e2m nh\u1eadp v\u00e0o b\u1ec1 m\u1eb7t c\u1ea3m bi\u1ebfn.<\/p>\n <\/div>\n <div class=\"rich-multicol-col\">\n <p class=\"rich-multicol-h\">D\u1ef1a tr\u00ean \u00e1nh s\u00e1ng (quang \u0111i\u1ec7n)<\/p>\n <p class=\"rich-multicol-b\">Ph\u00e1t hi\u1ec7n m\u1ee5c ti\u00eau th\u00f4ng qua ch\u00f9m \u00e1nh s\u00e1ng \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf. Ph\u1ea1m vi: t\u1eeb v\u00e0i centimet \u0111\u1ebfn v\u00e0i m\u00e9t. V\u1eadt li\u1ec7u: b\u1ea5t k\u1ef3 v\u1eadt li\u1ec7u n\u00e0o l\u00e0m thay \u0111\u1ed5i \u00e1nh s\u00e1ng \u2014 \u0111\u1ed3ng th\u1eddi \u0111\u1ed9 ph\u1ea3n x\u1ea1 c\u0169ng l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng. Ng\u1eebng ho\u1ea1t \u0111\u1ed9ng: khi c\u00f3 v\u1eadt c\u1ea3n ch\u1eb7n \u0111\u01b0\u1eddng \u0111i c\u1ee7a \u00e1nh s\u00e1ng.<\/p>\n <\/div>\n <\/div>\n <p>C\u00f2n m\u1ed9t thu\u1eadt ng\u1eef n\u1eefa c\u1ea7n l\u01b0u \u00fd: \u201cc\u1ea3m bi\u1ebfn kho\u1ea3ng c\u00e1ch\u201d tr\u00ean \u0111i\u1ec7n tho\u1ea1i v\u00e0 \u201cc\u1ea3m bi\u1ebfn\u201d b\u00ean trong m\u00e1y \u1ea3nh kh\u00f4ng li\u00ean quan g\u00ec \u0111\u1ebfn l\u0129nh v\u1ef1c ph\u00e1t hi\u1ec7n c\u00f4ng nghi\u1ec7p. N\u1ebfu k\u1ebft qu\u1ea3 t\u00ecm ki\u1ebfm c\u1ee7a b\u1ea1n li\u00ean t\u1ee5c hi\u1ec3n th\u1ecb c\u00e1c ch\u1ee7 \u0111\u1ec1 v\u1ec1 s\u1eeda ch\u1eefa \u0111i\u1ec7n tho\u1ea1i, \u0111\u00f3 ch\u00ednh l\u00e0 l\u00fd do. H\u01b0\u1edbng d\u1eabn n\u00e0y ch\u1ec9 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn lo\u1ea1i c\u1ea3m bi\u1ebfn c\u00f4ng nghi\u1ec7p.<\/p>\n <p>C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c t\u00f3m t\u1eaft trong hai c\u00e2u: m\u1ed9t b\u1ed9 ph\u1eadn c\u1ea3m \u1ee9ng \u0111i\u1ec1u khi\u1ec3n cu\u1ed9n d\u00e2y dao \u0111\u1ed9ng; khi v\u1eadt li\u1ec7u kim lo\u1ea1i \u0111i v\u00e0o v\u00f9ng t\u1eeb tr\u01b0\u1eddng, d\u00f2ng \u0111i\u1ec7n xo\u00e1y l\u00e0m suy gi\u1ea3m dao \u0111\u1ed9ng v\u00e0 t\u00edn hi\u1ec7u \u0111\u1ea7u ra \u0111\u1ea3o chi\u1ec1u. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao m\u1ee5c ti\u00eau ph\u1ea3i \u1edf g\u1ea7n v\u00e0 ph\u1ea3i l\u00e0 kim lo\u1ea1i. M\u1ed9t b\u1ed9 ph\u1eadn quang \u0111i\u1ec7n ph\u00e1t ra \u00e1nh s\u00e1ng \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf v\u00e0 theo d\u00f5i \u00e1nh s\u00e1ng ph\u1ea3n x\u1ea1 ho\u1eb7c b\u1ecb c\u1ea3n tr\u1edf; n\u00f3 c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n h\u1ea7u h\u1ebft m\u1ecdi v\u1eadt li\u1ec7u, nh\u01b0ng ch\u1ec9 khi v\u1eadt li\u1ec7u \u0111\u00f3 l\u00e0m thay \u0111\u1ed5i c\u01b0\u1eddng \u0111\u1ed9 \u00e1nh s\u00e1ng \u0111\u1ee7 l\u1edbn. Do \u0111\u00f3, \u0111\u1ed9 ph\u1ea3n x\u1ea1 v\u00e0 b\u1ee5i b\u1ea9n tr\u00ean b\u1ec1 m\u1eb7t l\u00e0 nh\u1eefng h\u1ea1n ch\u1ebf trong ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3.<\/p>\n <p>T\u1eeb \u0111\u00e2y tr\u1edf \u0111i, m\u1ecdi c\u00e2u h\u1ecfi th\u1ef1c ti\u1ec5n th\u1ef1c ch\u1ea5t \u0111\u1ec1u l\u00e0 c\u00e2u h\u1ecfi v\u1ec1 nh\u1eefng g\u00ec ph\u01b0\u01a1ng ti\u1ec7n \u0111\u00e3 ch\u1ecdn \u0111\u1eb7t ra cho b\u1ea1n: n\u00f3 c\u00f3 th\u1ec3 \u201cnh\u00ecn\u201d th\u1ea5y g\u00ec, t\u1ea7m ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3 \u0111\u1ebfn \u0111\u00e2u, \u0111i\u1ec1u g\u00ec c\u00f3 th\u1ec3 \u201cgi\u1ebft ch\u1ebft\u201d n\u00f3, v\u00e0 b\u1ea1n ph\u1ea3i \u0111\u00e1p \u1ee9ng nh\u1eefng y\u00eau c\u1ea7u n\u00e0o khi thay th\u1ebf n\u00f3.<\/p>\n\n <h2>Tr\u01b0\u1edbc ti\u00ean, lo\u1ea1i b\u1ecf v\u1eadt li\u1ec7u v\u00e0 khe h\u1edf<\/h2>\n <p>\u0110\u1eebng so s\u00e1nh th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt n\u1eefa tr\u01b0\u1edbc khi b\u1ea1n \u0111\u00e3 lo\u1ea1i b\u1ecf c\u00e1c \u1ee9ng vi\u00ean. Hai ti\u00eau ch\u00ed (v\u1eadt li\u1ec7u m\u1ee5c ti\u00eau v\u00e0 kho\u1ea3ng c\u00e1ch v\u1eadt l\u00fd) s\u1ebd lo\u1ea1i b\u1ecf ph\u1ea7n l\u1edbn c\u00e1c \u1ee9ng vi\u00ean ch\u1ec9 trong m\u1ed9t l\u1ea7n s\u00e0ng l\u1ecdc.<\/p>\n <h3>Ti\u00eau ch\u00ed th\u1ee9 nh\u1ea5t: M\u1ee5c ti\u00eau \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb ch\u1ea5t li\u1ec7u g\u00ec?<\/h3>\n <p>C\u1ea3m bi\u1ebfn c\u1ea3m \u1ee9ng ph\u00e1t hi\u1ec7n kim lo\u1ea1i, v\u00e0 ch\u1ec9 kim lo\u1ea1i m\u00e0 th\u00f4i. Kho\u1ea3ng c\u00e1ch c\u1ea3m bi\u1ebfn \u0111\u1ecbnh m\u1ee9c c\u1ee7a n\u00f3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh d\u1ef1a tr\u00ean m\u1ed9t m\u1ee5c ti\u00eau th\u00e9p ti\u00eau chu\u1ea9n (th\u01b0\u1eddng l\u00e0 m\u1ed9t mi\u1ebfng s\u1eaft SPCC h\u00ecnh vu\u00f4ng nh\u1ecf, thu\u1ed9c lo\u1ea1i 8\u00d78\u00d71 mm d\u00e0nh cho c\u00e1c n\u00f2ng s\u00fang nh\u1ecf g\u1ecdn). N\u1ebfu chuy\u1ec3n sang nh\u00f4m ho\u1eb7c \u0111\u1ed3ng thau, kho\u1ea3ng c\u00e1ch hi\u1ec7u d\u1ee5ng s\u1ebd gi\u1ea3m \u0111\u00e1ng k\u1ec3. \u0110\u1ed1i v\u1edbi v\u1eadt li\u1ec7u phi kim lo\u1ea1i \u1edf c\u1ef1 ly g\u1ea7n, \u0111\u00e2y l\u00e0 ph\u1ea1m vi c\u1ee7a c\u1ea3m bi\u1ebfn \u0111i\u1ec7n dung; \u0111\u1ed1i v\u1edbi v\u1eadt li\u1ec7u phi kim lo\u1ea1i \u1edf b\u1ea5t k\u1ef3 kho\u1ea3ng c\u00e1ch n\u00e0o, \u0111\u00e2y l\u00e0 ph\u1ea1m vi c\u1ee7a c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n.<\/p>\n <p>\u0110i\u1ec1u \u0111\u00f3 kh\u00f4ng c\u00f3 ngh\u0129a l\u00e0 \u201ckim lo\u1ea1i lu\u00f4n \u0111\u1ed3ng ngh\u0129a v\u1edbi c\u1ea3m bi\u1ebfn c\u1ea3m \u1ee9ng\u201d. C\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n kim lo\u1ea1i: n\u00f3 ph\u00e1t hi\u1ec7n s\u1ef1 thay \u0111\u1ed5i c\u1ee7a \u00e1nh s\u00e1ng, ch\u1ee9 kh\u00f4ng ph\u1ea3i t\u1eeb t\u00ednh. Vi\u1ec7c ph\u00e1t hi\u1ec7n kim lo\u1ea1i \u1edf kho\u1ea3ng c\u00e1ch n\u1eb1m ngo\u00e0i ph\u1ea1m vi c\u1ea3m \u1ee9ng l\u00e0 m\u1ed9t \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn c\u1ee7a c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n. \u201cKim lo\u1ea1i, do \u0111\u00f3 l\u00e0 c\u1ea3m bi\u1ebfn c\u1ea3m \u1ee9ng\u201d ch\u00ednh l\u00e0 l\u1ed1i t\u1eaft ph\u1ed5 bi\u1ebfn nh\u1ea5t khi\u1ebfn ng\u01b0\u1eddi mua ch\u1ecdn nh\u1ea7m d\u00f2ng s\u1ea3n ph\u1ea9m.<\/p>\n <h3>Ti\u00eau ch\u00ed th\u1ee9 hai: M\u1ee5c ti\u00eau c\u00e1ch bao xa th\u00ec m\u1edbi c\u00f3 th\u1ec3 quan s\u00e1t \u0111\u01b0\u1ee3c?<\/h3>\n <p>\u0110\u00e2y l\u00e0 thi\u1ebft b\u1ecb lo\u1ea1i tr\u1eeb nhanh nh\u1ea5t trong to\u00e0n b\u1ed9 danh m\u1ee5c s\u1ea3n ph\u1ea9m, v\u00e0 c\u0169ng l\u00e0 lo\u1ea1i m\u00e0 h\u1ea7u h\u1ebft c\u00e1c b\u00e0i vi\u1ebft th\u01b0\u1eddng m\u00f4 t\u1ea3 m\u1ed9t c\u00e1ch m\u01a1 h\u1ed3. C\u00e1c c\u1ea3m bi\u1ebfn c\u1ea3m \u1ee9ng h\u00ecnh tr\u1ee5 ti\u00eau chu\u1ea9n c\u00f3 c\u00e1c k\u00edch th\u01b0\u1edbc th\u00e2n M8, M12, M18 v\u00e0 M30. Kho\u1ea3ng c\u00e1ch \u0111\u1ecbnh m\u1ee9c c\u1ee7a ch\u00fang t\u0103ng d\u1ea7n theo k\u00edch th\u01b0\u1edbc v\u1ecf: kho\u1ea3ng 1\u20132 mm (M8), 2\u20134 mm (M12), 5\u20138 mm (M18) v\u00e0 10\u201315 mm (M30) khi \u0111o tr\u00ean m\u1ee5c ti\u00eau b\u1eb1ng th\u00e9p. Gi\u1edbi h\u1ea1n kho\u1ea3ng 15 mm tr\u00ean c\u1ea3m bi\u1ebfn M30 ti\u00eau chu\u1ea9n ch\u00ednh l\u00e0 gi\u1edbi h\u1ea1n cu\u1ed1i c\u00f9ng c\u1ee7a danh m\u1ee5c c\u1ea3m bi\u1ebfn c\u1ea3m \u1ee9ng truy\u1ec1n th\u1ed1ng.<\/p>\n\n <!-- BP-1 (upgrades RICH_ELEMENT Card-Stats at \u7ad92) -->\n <div class=\"bp-1-stats\">\n <p class=\"bp-1-stats-title\"><span class=\"bp-1-stats-ticon\"><svg viewbox=\"0 0 24 24\" width=\"18\" height=\"18\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><circle cx=\"12\" cy=\"12\" r=\"6\"\/><circle cx=\"12\" cy=\"12\" r=\"2\"\/><\/svg><\/span>Kho\u1ea3ng tr\u1ed1ng ch\u00ednh l\u00e0 b\u1ed9 l\u1ecdc \u0111\u1ea7u ti\u00ean<\/p>\n <p class=\"bp-1-stats-num\">\u224815 mm<\/p>\n <p class=\"bp-1-stats-cap\">Gi\u00e1 tr\u1ecb ng\u01b0\u1ee1ng \u0111\u1ecbnh m\u1ee9c c\u1ee7a c\u00e1c c\u1ea3m bi\u1ebfn c\u1ea3m \u1ee9ng h\u00ecnh tr\u1ee5 ti\u00eau chu\u1ea9n, t\u1eeb M8 \u0111\u1ebfn M30, \u0111\u01b0\u1ee3c \u0111o tr\u00ean m\u1ed9t m\u1ee5c ti\u00eau b\u1eb1ng th\u00e9p.<\/p>\n <div class=\"bp-1-stats-ladder\">\n <div class=\"bp-1-lad\"><p class=\"bp-1-lad-l\">M8<\/p><p class=\"bp-1-lad-v\">1\u20132 mm<\/p><\/div>\n <div class=\"bp-1-lad\"><p class=\"bp-1-lad-l\">M12<\/p><p class=\"bp-1-lad-v\">2\u20134 mm<\/p><\/div>\n <div class=\"bp-1-lad\"><p class=\"bp-1-lad-l\">M18<\/p><p class=\"bp-1-lad-v\">5\u20138 mm<\/p><\/div>\n <div class=\"bp-1-lad\"><p class=\"bp-1-lad-l\">M30<\/p><p class=\"bp-1-lad-v\">10\u201315 mm<\/p><\/div>\n <\/div>\n <p class=\"bp-1-stats-out\">Ngo\u00e0i ra, d\u00f2ng s\u1ea3n ph\u1ea9m n\u00e0y c\u00f2n m\u1edf r\u1ed9ng sang l\u0129nh v\u1ef1c quang \u0111i\u1ec7n. H\u00e3y t\u00ecm hi\u1ec3u v\u1ec1 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e1c th\u01b0\u01a1ng hi\u1ec7u v\u00e0 m\u1ee9c gi\u00e1 tr\u01b0\u1edbc khi \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh.<\/p>\n <\/div>\n\n <p>N\u1ebfu b\u1ea1n th\u1ea5y c\u00e1c kho\u1ea3ng c\u00e1ch c\u1ea3m \u1ee9ng \u0111\u01b0\u1ee3c ghi l\u00e0 \u201c25 mm\u201d ho\u1eb7c \u201c80 mm\u201d, \u0111\u00f3 l\u00e0 c\u00e1c d\u00f2ng s\u1ea3n ph\u1ea9m kh\u00e1c nhau: cu\u1ed9n d\u00e2y m\u1edf r\u1ed9ng ho\u1eb7c cu\u1ed9n d\u00e2y \u0111\u1eb7c bi\u1ec7t t\u1ea7m xa, ho\u1eb7c c\u00e1c thi\u1ebft b\u1ecb h\u00ecnh ch\u1eef nh\u1eadt \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 t\u0103ng t\u1ea7m ho\u1ea1t \u0111\u1ed9ng. H\u00e3y h\u1ecfi r\u00f5 con s\u1ed1 \u0111\u00f3 thu\u1ed9c d\u00f2ng s\u1ea3n ph\u1ea9m n\u00e0o tr\u01b0\u1edbc khi tin t\u01b0\u1edfng; \u0111\u1ed1i v\u1edbi lo\u1ea1i M30 h\u00ecnh tr\u1ee5 ti\u00eau chu\u1ea9n, con s\u1ed1 ch\u00ednh x\u00e1c th\u01b0\u1eddng n\u1eb1m trong kho\u1ea3ng 10\u201315 mm.<\/p>\n <p>C\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n bao qu\u00e1t ph\u1ea7n c\u00f2n l\u1ea1i. Lo\u1ea1i c\u1ea3m bi\u1ebfn khu\u1ebfch t\u00e1n c\u00f3 ph\u1ea1m vi ho\u1ea1t \u0111\u1ed9ng kho\u1ea3ng 0,1\u20130,3 m trong th\u1ef1c t\u1ebf, lo\u1ea1i ph\u1ea3n x\u1ea1 ng\u01b0\u1ee3c kho\u1ea3ng 1\u20132 m, v\u00e0 c\u1eb7p c\u1ea3m bi\u1ebfn xuy\u00ean ch\u00f9m c\u00f3 ph\u1ea1m vi 3\u20135 m ho\u1eb7c h\u01a1n. B\u1ed1 c\u1ee5c c\u01a1 kh\u00ed th\u01b0\u1eddng quy\u1ebft \u0111\u1ecbnh tr\u01b0\u1edbc khi b\u1ea1n \u0111\u01b0a ra l\u1ef1a ch\u1ecdn: n\u1ebfu gi\u00e1 \u0111\u1ee1 \u0111\u00e3 ch\u1eeba m\u1ed9t kho\u1ea3ng tr\u1ed1ng 40 mm so v\u1edbi m\u1ee5c ti\u00eau, th\u00ec kh\u00f4ng c\u1ea7n so s\u00e1nh c\u00e1c m\u1eabu c\u1ea3m bi\u1ebfn c\u1ea3m \u1ee9ng, v\u00ec m\u00e1y \u0111\u00e3 t\u1ef1 \u0111\u1ed9ng ch\u1ecdn c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n cho b\u1ea1n r\u1ed3i.<\/p>\n <div class=\"rich-table\">\n <p class=\"rich-table-title\">V\u1eadt li\u1ec7u \u00d7 khe h\u1edf: y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh<\/p>\n <div class=\"table-wrapper\"><table>\n <thead><tr><th>V\u1eadt li\u1ec7u m\u1ee5c ti\u00eau<\/th><th>Kho\u1ea3ng c\u00e1ch so v\u1edbi m\u1ee5c ti\u00eau<\/th><th>N\u01a1i n\u00f3 r\u01a1i xu\u1ed1ng<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Kim lo\u1ea1i (th\u00e9p)<\/td><td><\u224815 mm<\/td><td>Lo\u1ea1i c\u1ea3m \u1ee9ng (\u0111\u01a1n gi\u1ea3n nh\u1ea5t, kh\u00f4ng c\u1ea7n lau ch\u00f9i c\u00e1c b\u1ed9 ph\u1eadn quang h\u1ecdc)<\/td><\/tr>\n <tr><td>Kim lo\u1ea1i<\/td><td>>\u224815 mm<\/td><td>Quang \u0111i\u1ec7n (ho\u1eb7c d\u00f2ng c\u1ea3m \u1ee9ng t\u1ea7m xa\/\u0111\u1eb7c bi\u1ec7t)<\/td><\/tr>\n <tr><td>Nh\u1ef1a, g\u1ed7, b\u00eca c\u1ee9ng, th\u1ee7y tinh<\/td><td>B\u1ea5t k\u1ef3<\/td><td>Quang \u0111i\u1ec7n; c\u00e1c m\u1ee5c ti\u00eau trong su\u1ed1t c\u1ea7n \u0111\u01b0\u1ee3c ki\u1ec3m tra<\/td><\/tr>\n <tr><td>D\u1ea1ng l\u1ecfng, d\u1ea1ng b\u1ed9t, d\u1ea1ng h\u1ea1t<\/td><td>R\u1ea5t g\u1ea7n<\/td><td>C\u1ea3m bi\u1ebfn \u0111i\u1ec7n dung d\u00f9ng \u0111\u1ec3 \u0111o m\u1ee9c; c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n d\u00f9ng cho kho\u1ea3ng c\u00e1ch xa h\u01a1n<\/td><\/tr>\n <tr><td>M\u00e0u t\u1ed1i, b\u1ec1 m\u1eb7t m\u1edd, \u0111\u1ed9 ph\u1ea3n x\u1ea1 th\u1ea5p<\/td><td>\u0110\u00f3ng<\/td><td>C\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n khu\u1ebfch t\u00e1n \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m \u1edf kho\u1ea3ng c\u00e1ch th\u1ef1c t\u1ebf, ho\u1eb7c c\u1ea3m bi\u1ebfn ph\u1ea3n x\u1ea1 ng\u01b0\u1ee3c\/tia xuy\u00ean \u0111\u1ec3 tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng ph\u1ea3n x\u1ea1<\/td><\/tr>\n <\/tbody>\n <\/table><\/div>\n <\/div>\n <p>C\u00f3 m\u1ed9t ranh gi\u1edbi c\u1ea7n \u0111\u01b0\u1ee3c c\u1ea3nh b\u00e1o ri\u00eang: <strong>Kho\u1ea3ng c\u00e1ch \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 kh\u00f4ng ph\u1ea3i l\u00e0 kho\u1ea3ng c\u00e1ch c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c.<\/strong> C\u00e1c gi\u00e1 tr\u1ecb \u0111\u1ecbnh m\u1ee9c l\u00e0 s\u1ed1 li\u1ec7u thu \u0111\u01b0\u1ee3c trong ph\u00f2ng th\u00ed nghi\u1ec7m tr\u00ean m\u1ed9t m\u1ee5c ti\u00eau \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh r\u00f5 v\u1edbi m\u1ecdi th\u00e0nh ph\u1ea7n \u0111\u1ec1u \u1edf tr\u1ea1ng th\u00e1i m\u1edbi. Khi v\u1eadn h\u00e0nh c\u1ea3m bi\u1ebfn \u1edf kho\u1ea3ng c\u00e1ch \u0111\u1ecbnh m\u1ee9c t\u1ed1i \u0111a tuy\u1ec7t \u0111\u1ed1i, m\u1ecdi bi\u1ebfn s\u1ed1 trong th\u1ef1c t\u1ebf (m\u00e0i m\u00f2n m\u1ee5c ti\u00eau, rung \u0111\u1ed9ng, nhi\u1ec7t \u0111\u1ed9, dung sai l\u1eafp \u0111\u1eb7t) \u0111\u1ec1u l\u00e0m hao m\u00f2n bi\u00ean \u0111\u1ed9 an to\u00e0n m\u00e0 b\u1ea1n kh\u00f4ng c\u00f2n n\u1eefa. M\u1ed9t nh\u00f3m v\u1eadn h\u00e0nh m\u00e1y in \u0111\u00e3 s\u1eed d\u1ee5ng m\u1ed9t b\u1ed9 c\u1ea3m bi\u1ebfn c\u1ea3m \u1ee9ng M8 c\u00f3 kho\u1ea3ng c\u00e1ch \u0111\u1ecbnh m\u1ee9c 1,5 mm \u1edf r\u00eca ngo\u00e0i c\u00f9ng c\u1ee7a ph\u1ea1m vi ho\u1ea1t \u0111\u1ed9ng trong hai n\u0103m, sau \u0111\u00f3 ph\u00e1t hi\u1ec7n ra r\u1eb1ng n\u00f3 kh\u00f4ng kh\u1edbp v\u1edbi m\u1ed9t trong hai m\u1ee5c ti\u00eau c\u0103n ch\u1ec9nh. Nh\u1eefng k\u1ef9 thu\u1eadt vi\u00ean gi\u00e0u kinh nghi\u1ec7m ch\u1ea9n \u0111o\u00e1n s\u1ef1 c\u1ed1 \u0111\u00e3 ch\u1ec9 ra nguy\u00ean nh\u00e2n l\u00e0 do c\u00e1c m\u1ee5c ti\u00eau b\u1ecb m\u00f2n v\u00e0 bi\u00ean \u0111\u1ed9 an to\u00e0n b\u1eb1ng kh\u00f4ng, ch\u1ee9 kh\u00f4ng ph\u1ea3i do c\u1ea3m bi\u1ebfn b\u1ecb h\u1ecfng (<a href=\"https:\/\/www.eng-tips.com\/threads\/looking-to-replace-inductive-prox-switch-in-demanding-application.528519\/\">ch\u1ee7 \u0111\u1ec1<\/a>, 2025). L\u1eafp \u0111\u1eb7t \u1edf kho\u1ea3ng c\u00e1ch ch\u1ec9 b\u1eb1ng m\u1ed9t ph\u1ea7n nh\u1ecf so v\u1edbi kho\u1ea3ng c\u00e1ch \u0111\u1ecbnh m\u1ee9c (kho\u1ea3ng 80% ho\u1eb7c \u00edt h\u01a1n, theo nguy\u00ean t\u1eafc ban \u0111\u1ea7u) v\u00e0 coi \u0111\u01b0\u1eddng cong gi\u1ea3m \u0111\u1ecbnh m\u1ee9c \u0111\u1ed1i v\u1edbi c\u00e1c m\u1ee5c ti\u00eau kh\u00f4ng ph\u1ea3i b\u1eb1ng th\u00e9p l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt.<\/p>\n\n <h2>Ch\u1ecdn \u0111\u01b0\u1eddng truy\u1ec1n \u00e1nh s\u00e1ng n\u00e0o: Ba ch\u1ebf \u0111\u1ed9 quang \u0111i\u1ec7n<\/h2>\n <p>Khi \u0111\u00e3 ch\u1ecdn c\u00f4ng ngh\u1ec7 quang \u0111i\u1ec7n, vi\u1ec7c quy\u1ebft \u0111\u1ecbnh s\u1ebd do gia \u0111\u00ecnh quy\u1ebft \u0111\u1ecbnh: ch\u1ecdn m\u1ed9t trong ba \u0111\u01b0\u1eddng d\u1eabn \u00e1nh s\u00e1ng n\u00e0o. \u0110\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 c\u00e1c m\u1ee9c hi\u1ec7u su\u1ea5t; m\u00e0 l\u00e0 ba c\u1ea5u tr\u00fac quang h\u1ecdc kh\u00e1c nhau v\u1edbi chi ph\u00ed kh\u00e1c nhau.<\/p>\n <div class=\"rich-table\">\n <p class=\"rich-table-title\">T\u1ed5ng quan v\u1ec1 ba ch\u1ebf \u0111\u1ed9 quang \u0111i\u1ec7n<\/p>\n <div class=\"table-wrapper\"><table>\n <thead><tr><th>Ch\u1ebf \u0111\u1ed9<\/th><th>C\u1ea5u tr\u00fac<\/th><th>Ph\u1ea1m vi ph\u1ee7 s\u00f3ng \u0111i\u1ec3n h\u00ecnh<\/th><th>\u0110i\u1ec3m thu h\u00fat c\u1ee7a n\u00f3<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>C\u1ea3m bi\u1ebfn xuy\u00ean tia<\/td><td>T\u00e1ch ri\u00eang b\u1ed9 ph\u00e1t v\u00e0 b\u1ed9 thu<\/td><td>3\u20135 m +<\/td><td>\u1ed4n \u0111\u1ecbnh nh\u1ea5t, nh\u01b0ng c\u00f3 d\u00e2y v\u00e0 \u0111\u01b0\u1ee3c c\u0103n ch\u1ec9nh \u1edf hai b\u00ean<\/td><\/tr>\n <tr><td>T\u1ea7m trung (1\u20135 m\u00e9t):<\/td><td>M\u1ed9t v\u1ecf b\u1ecdc + g\u01b0\u01a1ng ph\u1ea3n x\u1ea1<\/td><td>\u22481\u20132 m<\/td><td>C\u1ea7n s\u1eed d\u1ee5ng k\u00ednh ph\u00e2n c\u1ef1c khi ch\u1ee5p c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng ph\u1ea3n chi\u1ebfu s\u00e1ng; l\u1edbp ph\u1ea3n x\u1ea1 d\u1ec5 b\u00e1m b\u1ee5i<\/td><\/tr>\n <tr><td>Ph\u1ed5 bi\u1ebfn<\/td><td>M\u1ed9t ng\u00f4i nh\u00e0, b\u1ec1 m\u1eb7t ph\u1ea3n chi\u1ebfu \u00e1nh s\u00e1ng<\/td><td>\u22480,1\u20130,3 m (\u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 tr\u00ean th\u1ebb tr\u1eafng 90%)<\/td><td>\u0110\u1ed9 ph\u1ea3n x\u1ea1 m\u1ee5c ti\u00eau quy\u1ebft \u0111\u1ecbnh t\u1ea7m b\u1eafn th\u1ef1c t\u1ebf: c\u00e1c s\u1ea3n ph\u1ea9m m\u00e0u \u0111en ho\u1eb7c c\u00f3 b\u1ec1 m\u1eb7t m\u1edd s\u1ebd l\u00e0m gi\u1ea3m t\u1ea7m b\u1eafn n\u00e0y r\u1ea5t nhanh<\/td><\/tr>\n <\/tbody>\n <\/table><\/div>\n <\/div>\n <p>V\u1ea5n \u0111\u1ec1 v\u1ec1 c\u1ea3m bi\u1ebfn khu\u1ebfch t\u00e1n c\u1ea7n \u0111\u01b0\u1ee3c nh\u1ea5n m\u1ea1nh, b\u1edfi \u0111\u00e2y l\u00e0 l\u1ed7i \u0111i\u1ec3n h\u00ecnh th\u01b0\u1eddng x\u1ea3y ra trong ng\u00e0y l\u1eafp \u0111\u1eb7t: kho\u1ea3ng c\u00e1ch \u0111\u1ecbnh m\u1ee9c c\u1ee7a c\u1ea3m bi\u1ebfn khu\u1ebfch t\u00e1n \u0111\u01b0\u1ee3c \u0111\u01b0a ra d\u1ef1a tr\u00ean th\u1ebb th\u1eed m\u00e0u tr\u1eafng c\u00f3 \u0111\u1ed9 ph\u1ea3n x\u1ea1 kho\u1ea3ng 90%. Ch\u1ec9 c\u1ea7n \u0111\u1eb7t m\u1ed9t khay m\u00e0u \u0111en, cao su m\u1edd ho\u1eb7c bao b\u00ec m\u00e0u t\u1ed1i tr\u01b0\u1edbc c\u1ea3m bi\u1ebfn l\u00e0 ph\u1ea1m vi ho\u1ea1t \u0111\u1ed9ng s\u1ebd gi\u1ea3m \u0111\u00e1ng k\u1ec3: c\u1ea3m bi\u1ebfn v\u1ed1n ho\u1ea1t \u0111\u1ed9ng ho\u00e0n h\u1ea3o trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh ban \u0111\u1ea7u s\u1ebd b\u1eaft \u0111\u1ea7u b\u1ecf s\u00f3t s\u1ea3n ph\u1ea9m th\u1ef1c t\u1ebf ch\u1ec9 sau m\u1ed9t tu\u1ea7n. Khi m\u00e0u s\u1eafc ho\u1eb7c b\u1ec1 m\u1eb7t c\u1ee7a m\u1ee5c ti\u00eau thay \u0111\u1ed5i, h\u00e3y gi\u1ea3m \u0111\u00e1ng k\u1ec3 kho\u1ea3ng c\u00e1ch l\u1eafp \u0111\u1eb7t ho\u1eb7c chuy\u1ec3n sang s\u1eed d\u1ee5ng c\u1ea3m bi\u1ebfn ph\u1ea3n x\u1ea1 ng\u01b0\u1ee3c \/ c\u1ea3m bi\u1ebfn ch\u00f9m tia xuy\u00ean qua, v\u1ed1n d\u1ef1a v\u00e0o g\u01b0\u01a1ng ph\u1ea3n x\u1ea1 ho\u1eb7c ch\u00f9m tia tr\u1ef1c ti\u1ebfp thay v\u00ec b\u1ec1 m\u1eb7t c\u1ee7a m\u1ee5c ti\u00eau.<\/p>\n <p>Ranh gi\u1edbi, m\u1ed7i lo\u1ea1i m\u1ed9t d\u00f2ng. Lo\u1ea1i xuy\u00ean tia: kh\u00f4ng n\u00ean ch\u1ecdn lo\u1ea1i n\u00e0y khi kh\u00f4ng th\u1ec3 l\u1eafp \u0111\u1eb7t v\u00e0 b\u1ea3o tr\u00ec c\u1ea3 hai \u0111\u1ea7u. Lo\u1ea1i ph\u1ea3n x\u1ea1 ng\u01b0\u1ee3c: c\u00e1c m\u1ee5c ti\u00eau c\u00f3 b\u1ec1 m\u1eb7t g\u01b0\u01a1ng c\u00f3 th\u1ec3 \u0111\u00e1nh l\u1eeba thi\u1ebft b\u1ecb kh\u00f4ng ph\u00e2n c\u1ef1c, v\u00e0 b\u1ed9 ph\u1ea3n x\u1ea1 s\u1ebd c\u1ea7n \u0111\u01b0\u1ee3c l\u00e0m s\u1ea1ch. Lo\u1ea1i khu\u1ebfch t\u00e1n: kh\u00f4ng n\u00ean ch\u1ec9 tin t\u01b0\u1edfng v\u00e0o lo\u1ea1i n\u00e0y khi h\u00ecnh th\u1ee9c s\u1ea3n ph\u1ea9m thay \u0111\u1ed5i. \u0110\u1ed1i v\u1edbi c\u00e1c m\u1ee5c ti\u00eau trong su\u1ed1t (chai, m\u00e0ng, th\u1ee7y tinh), m\u1ed7i ch\u1ebf \u0111\u1ed9 \u0111\u1ec1u c\u1ea7n \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m v\u1edbi v\u1eadt li\u1ec7u th\u1ef1c t\u1ebf, v\u00ec b\u1ea3ng d\u1eef li\u1ec7u kh\u00f4ng th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c t\u00e1c \u0111\u1ed9ng c\u1ee7a m\u1ed9t chai trong su\u1ed1t l\u00ean ch\u00f9m tia. Y\u1ebfu t\u1ed1 t\u01b0\u01a1ng \u1ee9ng v\u1edbi l\u1ef1a ch\u1ecdn n\u00e0y \u1edf ph\u00eda hi\u1ec7n tr\u01b0\u1eddng l\u00e0 l\u1eafp \u0111\u1eb7t ngang b\u1eb1ng so v\u1edbi l\u1eafp \u0111\u1eb7t kh\u00f4ng ngang b\u1eb1ng v\u00e0 k\u00edch th\u01b0\u1edbc th\u00f9ng, \u0111\u00e2y l\u00e0 v\u1ea5n \u0111\u1ec1 v\u1ec1 kh\u00f4ng gian l\u1eafp \u0111\u1eb7t h\u01a1n l\u00e0 v\u1ea5n \u0111\u1ec1 v\u1ec1 \u0111\u01b0\u1eddng \u0111i c\u1ee7a \u00e1nh s\u00e1ng.<\/p>\n\n <h2>T\u1ea1i sao c\u00e1c c\u1ea3m bi\u1ebfn l\u1ea1i g\u1eb7p s\u1ef1 c\u1ed1 trong qu\u00e1 tr\u00ecnh l\u00e0m vi\u1ec7c?<\/h2>\n <p>\u201cC\u1ea3m bi\u1ebfn ti\u1ec7m c\u1eadn th\u00ec b\u1ec1n, c\u00f2n c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n th\u00ec nh\u1ea1y c\u1ea3m\u201d \u2013 \u0111\u00f3 l\u00e0 c\u00e1ch gi\u1ea3i th\u00edch \u0111\u01a1n gi\u1ea3n h\u00f3a. C\u1ea3 hai lo\u1ea1i c\u1ea3m bi\u1ebfn n\u00e0y \u0111\u1ec1u c\u00f3 th\u1ec3 h\u1ecfng h\u00f3c trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng; ch\u00fang h\u1ecfng theo nh\u1eefng c\u00e1ch kh\u00e1c nhau, v\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t n\u1eb1m \u1edf ph\u01b0\u01a1ng ti\u1ec7n ho\u1ea1t \u0111\u1ed9ng. Khi m\u1ed9t c\u1ea3m bi\u1ebfn \u201cb\u1eaft \u0111\u1ea7u g\u1eb7p tr\u1ee5c tr\u1eb7c\u201d, c\u00e1ch kh\u1eafc ph\u1ee5c th\u01b0\u1eddng kh\u00f4ng ph\u1ea3i l\u00e0 thay b\u1eb1ng m\u1ed9t c\u1ea3m bi\u1ebfn t\u1ed1t h\u01a1n, m\u00e0 l\u00e0 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c b\u1ea1n \u0111ang g\u1eb7p ph\u1ea3i ch\u1ebf \u0111\u1ed9 h\u1ecfng h\u00f3c n\u00e0o.<\/p>\n <div class=\"rich-table\">\n <p class=\"rich-table-title\">Ma tr\u1eadn l\u1ed7i: \u0111i\u1ec1u ki\u1ec7n th\u1ef1c \u0111\u1ecba \u00d7 ph\u01b0\u01a1ng ti\u1ec7n c\u1ea3m bi\u1ebfn<\/p>\n <div class=\"table-wrapper\"><table>\n <thead><tr><th>\u0110i\u1ec1u ki\u1ec7n th\u1ef1c \u0111\u1ecba<\/th><th>C\u1ea3m bi\u1ebfn l\u1eafp \u0111\u1eb7t t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng<\/th><th>C\u1ea3m bi\u1ebfn d\u1ef1a tr\u00ean \u00e1nh s\u00e1ng<\/th><th>Ph\u1ea3i l\u00e0m g\u00ec<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>S\u01b0\u01a1ng d\u1ea7u, dung d\u1ecbch l\u00e0m m\u00e1t, b\u1ee5i m\u1ecbn<\/td><td>B\u1ee5i kim lo\u1ea1i c\u00f3 th\u1ec3 x\u00e2m nh\u1eadp v\u00e0o b\u00ean trong c\u1ea3m bi\u1ebfn qua nhi\u1ec1u n\u0103m: g\u00e2y ra c\u00e1c t\u00edn hi\u1ec7u b\u00e1o \u0111\u1ed9ng gi\u1ea3 khi kh\u00f4ng c\u00f3 v\u1eadt th\u1ec3 n\u00e0o \u1edf g\u1ea7n c\u1ea3m bi\u1ebfn (m\u1ed9t tr\u01b0\u1eddng h\u1ee3p li\u00ean quan \u0111\u1ebfn m\u00e1y CNC: m\u1ed9t thi\u1ebft b\u1ecb b\u1eaft \u0111\u1ea7u \u201cph\u00e1t hi\u1ec7n kim lo\u1ea1i\u201d sau h\u01a1n 2 n\u0103m ho\u1ea1t \u0111\u1ed9ng trong m\u00f4i tr\u01b0\u1eddng phun dung d\u1ecbch l\u00e0m m\u00e1t)<\/td><td>M\u1ed9t l\u1edbp m\u00e0ng d\u1ea7u tr\u00ean th\u1ea5u k\u00ednh \u0111ang l\u00e0m suy gi\u1ea3m d\u1ea7n kh\u1ea3 n\u0103ng c\u1ea3m bi\u1ebfn theo t\u1eebng tu\u1ea7n: v\u1ec1 m\u1eb7t \u0111i\u1ec7n th\u00ec v\u1eabn ho\u1ea1t \u0111\u1ed9ng t\u1ed1t, nh\u01b0ng v\u1ec1 m\u1eb7t quang h\u1ecdc th\u00ec kh\u00f4ng c\u00f2n ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c n\u1eefa<\/td><td>B\u1ed9 ph\u1eadn: thay th\u1ebf, l\u00e0 b\u1ed9 ph\u1eadn d\u00f9ng m\u1ed9t l\u1ea7n c\u00f3 gi\u00e1 r\u1ebb. \u0110\u00e8n: che ch\u1eafn \u1ed1ng k\u00ednh, l\u00ean l\u1ecbch v\u1ec7 sinh<\/td><\/tr>\n <tr><td>Ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ee9c gi\u1edbi h\u1ea1n \u0111\u1ecbnh m\u1ee9c<\/td><td>S\u1ef1 thay \u0111\u1ed5i dung sai v\u00e0 s\u1ef1 m\u00e0i m\u00f2n c\u1ee7a m\u1ee5c ti\u00eau khi\u1ebfn m\u1ee5c ti\u00eau l\u1ec7ch kh\u1ecfi bi\u00ean \u0111\u1ed9 c\u1ef1c k\u1ef3 h\u1eb9p: vi\u1ec7c c\u0103n ch\u1ec9nh b\u1ecb l\u1ec7ch m\u1ed9t c\u00e1ch kh\u00f4ng li\u00ean t\u1ee5c<\/td><td>S\u1ea3n ph\u1ea9m c\u00f3 m\u00e0u t\u1ed1i ho\u1eb7c b\u00f3ng v\u01b0\u1ee3t qu\u00e1 kho\u1ea3ng c\u00e1ch th\u1ebb tr\u1eafng: c\u00e1c l\u1ed7i b\u1eaft \u0111\u1ea7u xu\u1ea5t hi\u1ec7n sau khi \u0111\u01b0a v\u00e0o v\u1eadn h\u00e0nh<\/td><td>Gi\u1ea3m t\u1ef7 l\u1ec7 xu\u1ed1ng c\u00f2n ~80% so v\u1edbi kho\u1ea3ng c\u00e1ch \u0111\u1ecbnh m\u1ee9c; ti\u1ebfn h\u00e0nh th\u1eed nghi\u1ec7m v\u1edbi m\u1ee5c ti\u00eau th\u1ef1c t\u1ebf<\/td><\/tr>\n <tr><td>Nhi\u1ec1u b\u1ed9 ph\u1eadn quang \u0111i\u1ec7n \u1edf g\u1ea7n \u0111\u00f3<\/td><td>EMI tr\u00ean c\u00e1c \u0111o\u1ea1n \u0111\u01b0\u1eddng d\u00e0i l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 ri\u00eang bi\u1ec7t v\u00e0 c\u00f3 th\u1ec3 ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c<\/td><td>Khi ch\u1ea1y c\u00f9ng nhau, c\u00e1c \u0111\u01b0\u1eddng truy\u1ec1n quang giao nhau s\u1ebd g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng k\u00edch ho\u1ea1t sai l\u1eabn nhau: ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng khi ch\u1ea1y ri\u00eang l\u1ebb, nh\u01b0ng ho\u1ea1t \u0111\u1ed9ng th\u1ea5t th\u01b0\u1eddng khi ch\u1ea1y li\u00ean ti\u1ebfp<\/td><td>Tr\u01b0\u1edbc ti\u00ean, h\u00e3y \u0111i\u1ec1u ch\u1ec9nh v\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t: xen k\u1ebd, nghi\u00eang, che ch\u1eafn; ki\u1ec3m tra \u0111\u1ed3ng th\u1eddi t\u1ea5t c\u1ea3 c\u00e1c thi\u1ebft b\u1ecb<\/td><\/tr>\n <tr><td>\u00c1nh s\u00e1ng ch\u00f3i ho\u1eb7c tia l\u1eeda h\u00e0n<\/td><td>Kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi \u00e1nh s\u00e1ng (nhi\u1ec7t v\u00e0 tia b\u1eafn m\u1edbi l\u00e0 nh\u1eefng k\u1ebb th\u00f9 th\u1ef1c s\u1ef1)<\/td><td>\u00c1nh s\u00e1ng m\u1ea1nh chi\u1ebfu tr\u1ef1c ti\u1ebfp c\u00f3 th\u1ec3 l\u00e0m m\u1ea5t t\u00e1c d\u1ee5ng c\u1ee7a b\u1ed9 l\u1ecdc \u00e1nh s\u00e1ng \u0111i\u1ec1u ch\u1ebf tr\u00ean b\u1ed9 thu<\/td><td>\u0110i\u1ec1u ch\u1ec9nh \u0111\u1ed9 che khu\u1ea5t ho\u1eb7c g\u00f3c c\u1ee7a h\u1ec7 th\u1ed1ng quang h\u1ecdc; tr\u00e1nh \u0111\u1ec3 ch\u00f9m s\u00e1ng g\u00e2y ch\u00f3i tr\u1ef1c ti\u1ebfp<\/td><\/tr>\n <\/tbody>\n <\/table><\/div>\n <\/div>\n <p>Nh\u1eefng c\u00e2u chuy\u1ec7n vui th\u01b0\u1eddng mang m\u1ed9t m\u00f4 t\u00edp (<a href=\"https:\/\/www.reddit.com\/r\/CNC\/comments\/oubafe\/proximity_sensor_not_working_properly_it_keeps\/\">Ren CNC<\/a>, 2021): b\u1ed9 ph\u1eadn c\u1ea3m \u1ee9ng b\u1ecb ng\u1eadp trong s\u01b0\u01a1ng ch\u1ea5t l\u00e0m m\u00e1t kh\u00f4ng ph\u1ea3i l\u00e0 tr\u01b0\u1eddng h\u1ee3p hi\u1ebfm g\u1eb7p. M\u1ed9t nh\u00e2n vi\u00ean b\u1ea3o tr\u00ec th\u01b0\u1eddng xuy\u00ean cho bi\u1ebft h\u1ecd \u201clu\u00f4n d\u1ef1 tr\u1eef s\u1eb5n m\u1ed9t x\u00f4 nh\u1eefng b\u1ed9 ph\u1eadn \u0111\u00f3\u201d, b\u1edfi \u1edf m\u1ee9c gi\u00e1 \u0111\u00f3, vi\u1ec7c thay m\u1edbi s\u1ebd ti\u1ebft ki\u1ec7m h\u01a1n so v\u1edbi vi\u1ec7c ch\u1ea9n \u0111o\u00e1n. V\u1ec1 m\u1eb7t t\u00edch c\u1ef1c, ph\u00e0n n\u00e0n th\u01b0\u1eddng g\u1eb7p kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ef1 c\u1ed1 \u0111i\u1ec7n m\u00e0 l\u00e0 vi\u1ec7c b\u1ea3o tr\u00ec h\u1ec7 th\u1ed1ng quang h\u1ecdc; m\u1ed9t ch\u1ee7 \u0111\u1ec1 th\u1ea3o lu\u1eadn tr\u00ean di\u1ec5n \u0111\u00e0n v\u1ec1 PLC \u0111\u00e3 \u0111\u1eb7t c\u00e2u h\u1ecfi, ch\u1ec9 n\u1eeda \u0111\u00f9a n\u1eeda th\u1eadt, li\u1ec7u c\u00f3 t\u1ed3n t\u1ea1i c\u1ea3m bi\u1ebfn quang t\u1ef1 l\u00e0m s\u1ea1ch hay kh\u00f4ng. Khi kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n suy gi\u1ea3m d\u1ea7n, h\u00e3y nghi ng\u1edd \u1ed1ng k\u00ednh tr\u01b0\u1edbc khi nghi ng\u1edd c\u00e1c linh ki\u1ec7n \u0111i\u1ec7n t\u1eed.<\/p>\n\n <!-- BP-2 (Replaces: \"The diagnostic order that saves money: ask what changed (environment, mounting, target) before replacing anything.\") -->\n <div class=\"bp-2-warn\">\n <span class=\"bp-2-warn-ic\"><svg viewbox=\"0 0 24 24\" width=\"24\" height=\"24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><path d=\"m21.73 18-8-14a2 2 0 0 0-3.48 0l-8 14A2 2 0 0 0 4 21h16a2 2 0 0 0 1.73-3Z\"\/><line x1=\"12\" x2=\"12\" y1=\"9\" y2=\"13\"\/><line x1=\"12\" x2=\"12.01\" y1=\"17\" y2=\"17\"\/><\/svg><\/span>\n <p class=\"bp-2-warn-t\">H\u00e3y ki\u1ec3m tra nh\u1eefng thay \u0111\u1ed5i \u0111\u00e3 x\u1ea3y ra tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng: m\u00f4i tr\u01b0\u1eddng, c\u00e1ch l\u1eafp \u0111\u1eb7t ho\u1eb7c m\u1ee5c ti\u00eau. Sau \u0111\u00f3, th\u1ef1c hi\u1ec7n quy tr\u00ecnh ki\u1ec3m tra thay th\u1ebf n\u0103m b\u01b0\u1edbc \u0111\u01b0\u1ee3c n\u00eau trong ph\u1ea7n ti\u1ebfp theo.<\/p>\n <\/div>\n\n <p>M\u1ed9t l\u00e1 c\u1edd m\u1ee5c ti\u00eau \u0111\u00e3 m\u00f2n, m\u1ed9t t\u1ea5m ph\u1ea3n quang b\u1ecb b\u00e1m b\u1ea9n, ho\u1eb7c m\u1ed9t gi\u00e1 \u0111\u1ee1 b\u1ecb l\u1ec7ch \u0111i m\u1ed9t milimet c\u0169ng \u0111\u1ee7 \u0111\u1ec3 l\u00e0m h\u1ecfng m\u1ed9t c\u1ea3m bi\u1ebfn m\u1edbi toanh c\u1ee7a b\u1ea5t k\u1ef3 th\u01b0\u01a1ng hi\u1ec7u n\u00e0o. Ch\u1ec9 n\u00ean thay \u0111\u1ed5i c\u00f4ng ngh\u1ec7 khi ch\u00ednh m\u00f4i tr\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi \u0111\u1ecba \u0111i\u1ec3m \u0111\u00f3, ch\u1ee9 kh\u00f4ng ph\u1ea3i ch\u1ec9 v\u00ec m\u1ed9t tr\u01b0\u1eddng h\u1ee3p c\u1ee5 th\u1ec3 n\u00e0o \u0111\u00f3 g\u1eb7p s\u1ef1 c\u1ed1.<\/p>\n\n <h2>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt khi\u1ebfn c\u00e1c linh ki\u1ec7n thay th\u1ebf kh\u00f4ng t\u01b0\u01a1ng th\u00edch: \u0110\u1ea7u ra v\u00e0 h\u1ec7 th\u1ed1ng d\u00e2y d\u1eabn<\/h2>\n <p>\u0110\u00e2y l\u00e0 \u0111i\u1ec3m m\u00e0 c\u00e1c b\u00e0i vi\u1ebft so s\u00e1nh linh ki\u1ec7n th\u01b0\u1eddng b\u1ecf qua, nh\u01b0ng l\u1ea1i l\u00e0 \u0111i\u1ec1u m\u00e0 ng\u00e0nh c\u00f4ng nghi\u1ec7p ph\u1ea3i tr\u1ea3 gi\u00e1: khi m\u1ed9t c\u1ea3m bi\u1ebfn h\u1ecfng, vi\u1ec7c \u201cch\u1ec9 c\u1ea7n thay th\u1ebf n\u00f3\u201d th\u01b0\u1eddng th\u1ea5t b\u1ea1i do kh\u00f4ng \u0111\u00e1p \u1ee9ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111i\u1ec7n nhi\u1ec1u h\u01a1n l\u00e0 do nguy\u00ean l\u00fd c\u1ea3m bi\u1ebfn. B\u1ea1n c\u00f3 th\u1ec3 thay th\u1ebf m\u1ed9t c\u1ea3m bi\u1ebfn c\u1ea3m \u1ee9ng b\u1eb1ng m\u1ed9t c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n t\u1ea1i \u0111i\u1ec3m ph\u00e1t hi\u1ec7n v\u00e0 n\u00f3 v\u1eabn ho\u1ea1t \u0111\u1ed9ng. Tuy nhi\u00ean, ngay c\u1ea3 khi s\u1eed d\u1ee5ng c\u00f9ng m\u1ed9t d\u00f2ng s\u1ea3n ph\u1ea9m ch\u00ednh x\u00e1c, b\u1ea1n v\u1eabn c\u00f3 th\u1ec3 nh\u1eadn \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o b\u1ecb h\u1ecfng n\u1ebfu lo\u1ea1i t\u00edn hi\u1ec7u \u0111\u1ea7u ra kh\u00f4ng ph\u00f9 h\u1ee3p.<\/p>\n <h3>C\u1ea5u tr\u00fac \u0111\u1ea7u ra: ba thi\u1ebft b\u1ecb c\u00f9ng d\u00f2ng, trong \u0111\u00f3 c\u00f3 m\u1ed9t thi\u1ebft b\u1ecb t\u01b0\u01a1ng th\u00edch<\/h3>\n <p>C\u00e1c c\u1ea3m bi\u1ebfn \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i th\u00e0nh ba nh\u00f3m ch\u00ednh. <strong>NPN<\/strong> (sink): \u0111\u1ea7u ra chuy\u1ec3n t\u1ea3i v\u1ec1 m\u1ee9c 0 V, \u0111\u00e2y l\u00e0 thi\u1ebft l\u1eadp m\u1eb7c \u0111\u1ecbnh truy\u1ec1n th\u1ed1ng \u1edf ph\u1ea7n l\u1edbn c\u00e1c n\u01b0\u1edbc ch\u00e2u \u00c1 v\u00e0 tr\u00ean c\u00e1c thi\u1ebft b\u1ecb c\u0169 c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb Nh\u1eadt B\u1ea3n. <strong>PNP<\/strong> (ngu\u1ed3n): \u0110\u1ea7u ra cung c\u1ea5p \u0111i\u1ec7n \u00e1p +24 V cho t\u1ea3i, \u0111\u00e2y l\u00e0 ti\u00eau chu\u1ea9n hi\u1ec7n \u0111\u1ea1i \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng r\u1ed9ng r\u00e3i \u1edf ch\u00e2u \u00c2u v\u00e0 B\u1eafc M\u1ef9. <strong>Hai d\u00e2y<\/strong> C\u00e1c thi\u1ebft b\u1ecb (d\u00f2ng m\u1ed9t chi\u1ec1u ho\u1eb7c xoay chi\u1ec1u) \u0111\u01b0\u1ee3c n\u1ed1i ti\u1ebfp v\u1edbi t\u1ea3i gi\u1ed1ng nh\u01b0 m\u1ed9t ti\u1ebfp \u0111i\u1ec3m c\u00f4ng t\u1eafc; c\u00e1c phi\u00ean b\u1ea3n hai d\u00e2y xoay chi\u1ec1u l\u00e0 ph\u1ee5 t\u00f9ng thay th\u1ebf truy\u1ec1n th\u1ed1ng cho c\u00e1c m\u00e1y m\u00f3c c\u0169 v\u00e0 c\u00e1c m\u1ea1ch r\u01a1le \u0111\u01a1n gi\u1ea3n.<\/p>\n <p>N\u1ebfu k\u1ebft n\u1ed1i c\u1ea3m bi\u1ebfn PNP v\u1edbi \u0111\u1ea7u v\u00e0o NPN c\u1ee7a PLC, b\u1ea1n s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c m\u1ed9t k\u00eanh kh\u00f4ng bao gi\u1edd k\u00edch ho\u1ea1t ho\u1eb7c k\u00edch ho\u1ea1t theo h\u01b0\u1edbng ng\u01b0\u1ee3c l\u1ea1i. \u0110\u00e2y ch\u00ednh l\u00e0 tr\u01b0\u1eddng h\u1ee3p th\u01b0\u1eddng g\u1eb7p nh\u1ea5t khi\u1ebfn ng\u01b0\u1eddi ta cho r\u1eb1ng \u201cc\u1ea3m bi\u1ebfn n\u00e0y b\u1ecb h\u1ecfng\u201d, trong khi th\u1ef1c t\u1ebf \u0111\u00f3 l\u1ea1i l\u00e0 v\u1ea5n \u0111\u1ec1 v\u1ec1 \u0111\u1ea5u d\u00e2y. Khi logic \u0111\u1ea7u ra ph\u1ea3i \u0111\u1ea3o ng\u01b0\u1ee3c (NO so v\u1edbi NC, ho\u1eb7c ch\u1ebf \u0111\u1ed9 k\u00edch ho\u1ea1t khi c\u00f3 \u00e1nh s\u00e1ng so v\u1edbi ch\u1ebf \u0111\u1ed9 k\u00edch ho\u1ea1t khi kh\u00f4ng c\u00f3 \u00e1nh s\u00e1ng tr\u00ean c\u00e1c thi\u1ebft b\u1ecb quang \u0111i\u1ec7n), c\u00f9ng m\u1ed9t thi\u1ebft b\u1ecb s\u1ebd ho\u1ea1t \u0111\u1ed9ng theo h\u01b0\u1edbng ng\u01b0\u1ee3c l\u1ea1i. \u0110\u1ed1i v\u1edbi c\u1eb7p c\u1ea3m bi\u1ebfn xuy\u00ean tia, h\u00e3y nh\u1edb r\u1eb1ng \u0111\u1ea7u ra c\u1ee7a b\u1ed9 thu s\u1ebd thay \u0111\u1ed5i khi tia s\u00e1ng b\u1ecb <em>b\u1ecb h\u1ecfng<\/em>, tr\u00e1i ng\u01b0\u1ee3c v\u1edbi nh\u1eefng g\u00ec tr\u1ef1c gi\u00e1c th\u01b0\u1eddng d\u1ef1 \u0111o\u00e1n. M\u00e3 s\u1ed1 m\u1eabu m\u00e3 th\u1ec3 hi\u1ec7n t\u1ea5t c\u1ea3 nh\u1eefng th\u00f4ng tin n\u00e0y, th\u01b0\u1eddng th\u00f4ng qua h\u1eadu t\u1ed1 (c\u00e1c m\u00e3 s\u1ed1 linh ki\u1ec7n c\u00f9ng d\u00f2ng theo ki\u1ec3u -N \/ -P). Khi b\u1ea1n nh\u1eadp kho ho\u1eb7c \u0111\u1eb7t h\u00e0ng, c\u00e1c phi\u00ean b\u1ea3n NPN v\u00e0 PNP c\u1ee7a c\u00f9ng m\u1ed9t c\u1ea3m bi\u1ebfn \u0111\u01b0\u1ee3c coi l\u00e0 hai m\u00e3 SKU ri\u00eang bi\u1ec7t, ch\u1ee9 kh\u00f4ng ph\u1ea3i m\u1ed9t.<\/p>\n <p>T\u1ed1c \u0111\u1ed9, gi\u1ea3i m\u00e3: Trong c\u00e1c d\u00f2ng s\u1ea3n ph\u1ea9m c\u1ea3m bi\u1ebfn h\u00ecnh tr\u1ee5 DC th\u00f4ng th\u01b0\u1eddng, t\u1ea7n s\u1ed1 chuy\u1ec3n m\u1ea1ch n\u1eb1m trong kho\u1ea3ng v\u00e0i tr\u0103m hertz. M\u1ed9t c\u1ea3m bi\u1ebfn c\u1ea3m \u1ee9ng ti\u00eau chu\u1ea9n v\u00e0 m\u1ed9t c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n DC c\u00f9ng lo\u1ea1i th\u01b0\u1eddng c\u00f3 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt t\u01b0\u01a1ng \u0111\u01b0\u01a1ng (kho\u1ea3ng 500 Hz), trong khi c\u00e1c phi\u00ean b\u1ea3n hai d\u00e2y AC l\u1ea1i ch\u1eadm h\u01a1n \u0111\u00e1ng k\u1ec3 (~250 Hz). C\u00e2u n\u00f3i \u201cC\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n ch\u1eadm, c\u1ea3m bi\u1ebfn c\u1ea3m \u1ee9ng nhanh\u201d l\u00e0 m\u1ed9t nh\u1eadn \u0111\u1ecbnh \u1edf c\u1ea5p \u0111\u1ed9 m\u00f4 h\u00ecnh nh\u01b0ng l\u1ea1i \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y d\u01b0\u1edbi v\u1ecf b\u1ecdc c\u1ee7a c\u1ea5p \u0111\u1ed9 c\u00f4ng ngh\u1ec7. H\u00e3y ki\u1ec3m tra h\u00e0ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt trong b\u1ea3ng d\u1eef li\u1ec7u \u0111\u1ec3 bi\u1ebft th\u00f4ng tin ch\u00ednh x\u00e1c v\u1ec1 t\u1eebng m\u1eabu c\u1ee5 th\u1ec3.<\/p>\n <h3>Quy tr\u00ecnh ki\u1ec3m tra thay th\u1ebf g\u1ed3m n\u0103m b\u01b0\u1edbc<\/h3>\n <p>Khi m\u1ed9t m\u00e1y c\u00f3 c\u1ea3m bi\u1ebfn b\u1ecb h\u1ecfng (ho\u1eb7c kh\u00e1ch h\u00e0ng g\u1eedi \u1ea3nh ch\u1ee5p c\u1ea3m bi\u1ebfn \u0111\u00f3), h\u00e3y ki\u1ec3m tra theo danh s\u00e1ch n\u00e0y tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng (<a href=\"https:\/\/www.reddit.com\/r\/PLC\/comments\/n34gqf\/what_things_do_you_need_to_think_about_to_replace\/\">Ch\u1ee7 \u0111\u1ec1 v\u1ec1 PLC<\/a>, 2021):<\/p>\n <div class=\"rich-checklist\">\n <p class=\"rich-checklist-title\"><span class=\"rich-checklist-ticon\"><svg viewbox=\"0 0 24 24\" width=\"18\" height=\"18\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><path d=\"m3 17 2 2 4-4\"\/><path d=\"m3 7 2 2 4-4\"\/><line x1=\"13\" x2=\"21\" y1=\"6\" y2=\"6\"\/><line x1=\"13\" x2=\"21\" y1=\"12\" y2=\"12\"\/><line x1=\"13\" x2=\"21\" y1=\"18\" y2=\"18\"\/><\/svg><\/span>Ki\u1ec3m tra thay th\u1ebf n\u0103m \u0111i\u1ec3m<\/p>\n <ol>\n <li><span class=\"rich-checklist-li-ic\"><svg viewbox=\"0 0 24 24\" width=\"18\" height=\"18\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><path d=\"m9 12 2 2 4-4\"\/><\/svg><\/span><p class=\"rich-checklist-li-t\">\u0110\u1ebfm s\u1ed1 d\u00e2y v\u00e0 \u0111o \u0111i\u1ec7n \u00e1p: H\u1ec7 th\u1ed1ng DC 3 d\u00e2y so v\u1edbi DC 2 d\u00e2y so v\u1edbi AC 2 d\u00e2y s\u1ebd quy\u1ebft \u0111\u1ecbnh m\u1ecdi th\u1ee9 \u1edf c\u00e1c giai \u0111o\u1ea1n ti\u1ebfp theo.<\/p><\/li>\n <li><span class=\"rich-checklist-li-ic\"><svg viewbox=\"0 0 24 24\" width=\"18\" height=\"18\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><path d=\"m9 12 2 2 4-4\"\/><\/svg><\/span><p class=\"rich-checklist-li-t\">X\u00e1c \u0111\u1ecbnh c\u1ef1c t\u00ednh \u0111\u1ea7u ra: PNP hay NPN; ch\u1ec9 c\u1ea7n th\u1ef1c hi\u1ec7n m\u1ed9t ph\u00e9p \u0111o b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng (xem \u0111\u01b0\u1eddng \u0111i\u1ec7n n\u00e0o l\u00e0m s\u00e1ng \u0111\u1ea7u v\u00e0o PLC) l\u00e0 c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c trong v\u00e0i gi\u00e2y.<\/p><\/li>\n <li><span class=\"rich-checklist-li-ic\"><svg viewbox=\"0 0 24 24\" width=\"18\" height=\"18\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><path d=\"m9 12 2 2 4-4\"\/><\/svg><\/span><p class=\"rich-checklist-li-t\">X\u00e1c \u0111\u1ecbnh ch\u1ebf \u0111\u1ed9 c\u1ea3m bi\u1ebfn: ch\u1ebf \u0111\u1ed9 xuy\u00ean tia c\u1ea7n c\u00f3 c\u1eb7p c\u1ea3m bi\u1ebfn t\u01b0\u01a1ng \u1ee9ng, ch\u1ebf \u0111\u1ed9 ph\u1ea3n x\u1ea1 c\u1ea7n c\u00f3 b\u1ed9 ph\u1ea3n x\u1ea1, c\u00f2n ch\u1ebf \u0111\u1ed9 khu\u1ebfch t\u00e1n l\u00e0 ch\u1ebf \u0111\u1ed9 m\u1ed9t \u0111\u1ea7u.<\/p><\/li>\n <li><span class=\"rich-checklist-li-ic\"><svg viewbox=\"0 0 24 24\" width=\"18\" height=\"18\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><path d=\"m9 12 2 2 4-4\"\/><\/svg><\/span><p class=\"rich-checklist-li-t\">\u0110o k\u00edch th\u01b0\u1edbc l\u1eafp \u0111\u1eb7t: ren \u1ed1ng (M8 \/ M12 \/ M18 \/ M30), m\u1eb7t ph\u1eb3ng ngang b\u1eb1ng ho\u1eb7c kh\u00f4ng ngang b\u1eb1ng.<\/p><\/li>\n <li><span class=\"rich-checklist-li-ic\"><svg viewbox=\"0 0 24 24\" width=\"18\" height=\"18\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><path d=\"m9 12 2 2 4-4\"\/><\/svg><\/span><p class=\"rich-checklist-li-t\">X\u00e1c nh\u1eadn logic: NO ho\u1eb7c NC, ho\u1ea1t \u0111\u1ed9ng khi s\u00e1ng ho\u1eb7c khi t\u1ed1i, so v\u1edbi ch\u01b0\u01a1ng tr\u00ecnh PLC.<\/p><\/li>\n <\/ol>\n <\/div>\n <p>M\u1ed9t nh\u00f3m c\u00f4ng nh\u00e2n n\u00f4ng tr\u1ea1i t\u1eebng thay th\u1ebf m\u1ed9t c\u1ea3m bi\u1ebfn \u00e1nh s\u00e1ng b\u1ecb h\u1ecfng tr\u00ean m\u1ed9t chi\u1ebfc m\u00e1y s\u1ea3n xu\u1ea5t n\u0103m 1983 ch\u1ec9 d\u1ef1a v\u00e0o hai ti\u00eau ch\u00ed (c\u00f9ng \u0111i\u1ec7n \u00e1p 24 V, c\u00f9ng ba d\u00e2y d\u1eabn), v\u00e0 m\u1ecdi c\u00e2u tr\u1ea3 l\u1eddi t\u1eeb nh\u1eefng ng\u01b0\u1eddi c\u00f3 kinh nghi\u1ec7m \u0111\u1ec1u b\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00f9ng m\u1ed9t l\u01b0u \u00fd: \u201cPNP hay NPN\u201d m\u1edbi l\u00e0 v\u1ea5n \u0111\u1ec1 quan tr\u1ecdng nh\u1ea5t, ti\u1ebfp theo l\u00e0 ch\u1ebf \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng, r\u1ed3i m\u1edbi \u0111\u1ebfn logic. L\u1eddi khuy\u00ean qu\u00fd gi\u00e1 kh\u00e1c r\u00fat ra t\u1eeb ch\u1ee7 \u0111\u1ec1 \u0111\u00f3 \u00e1p d\u1ee5ng cho m\u1ecdi th\u01b0\u01a1ng hi\u1ec7u: c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u1eb7t t\u00ean kh\u00e1c nhau cho c\u00f9ng m\u1ed9t kh\u00e1i ni\u1ec7m, do \u0111\u00f3 m\u00e3 s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c d\u1eadp tr\u00ean th\u00e2n linh ki\u1ec7n m\u1edbi l\u00e0 c\u00e1ch nh\u1eadn di\u1ec7n \u0111\u00e1ng tin c\u1eady duy nh\u1ea5t. H\u00e3y \u0111\u1ecdc k\u1ef9 tr\u01b0\u1edbc khi t\u00ecm ki\u1ebfm.<\/p>\n\n <h2>\u0110i\u1ec1u n\u00e0y c\u00f3 \u00fd ngh\u0129a g\u00ec n\u1ebfu b\u1ea1n kinh doanh c\u1ea3m bi\u1ebfn?<\/h2>\n <p>N\u1ebfu b\u1ea1n kinh doanh v\u00e0 ph\u00e2n ph\u1ed1i c\u1ea3m bi\u1ebfn, h\u00e3y ho\u00e0n to\u00e0n t\u1eeb b\u1ecf c\u00e1ch \u0111\u1eb7t v\u1ea5n \u0111\u1ec1 \u201clo\u1ea1i n\u00e0o t\u1ed1t h\u01a1n\u201d; \u0111\u00f3 l\u00e0 h\u01b0\u1edbng suy ngh\u0129 sai l\u1ea7m. C\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 v\u1eadt li\u1ec7u, kho\u1ea3ng c\u00e1ch v\u00e0 \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng n\u00eau tr\u00ean m\u1edbi l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh lo\u1ea1i c\u1ea3m bi\u1ebfn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho t\u1eebng \u0111i\u1ec3m ph\u00e1t hi\u1ec7n, ch\u1ee9 kh\u00f4ng ph\u1ea3i s\u1edf th\u00edch c\u00e1 nh\u00e2n; h\u1ea7u h\u1ebft c\u00e1c d\u00e2y chuy\u1ec1n t\u1ef1 \u0111\u1ed9ng \u0111\u1ec1u v\u1eadn h\u00e0nh c\u1ea3 hai lo\u1ea1i c\u1ea3m bi\u1ebfn c\u00f9ng l\u00fac. M\u1ed9t m\u00e1y \u0111\u1ebfm chi ti\u1ebft th\u00e9p b\u1eb1ng c\u1ea3m bi\u1ebfn c\u1ea3m \u1ee9ng M18 s\u1ebd c\u00f3 tr\u1ea1m \u0111\u00f3ng g\u00f3i c\u00e1ch \u0111\u00f3 m\u01b0\u1eddi m\u00e9t, n\u01a1i \u0111\u1ebfm th\u00f9ng carton b\u1eb1ng c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n khu\u1ebfch t\u00e1n. Kh\u00e1ch h\u00e0ng c\u1ee7a b\u1ea1n kh\u00f4ng ph\u1ea3i l\u00e0 ng\u01b0\u1eddi l\u1ef1a ch\u1ecdn gi\u1eefa c\u00e1c d\u00f2ng s\u1ea3n ph\u1ea9m; ch\u00ednh c\u00e1c m\u00e1y m\u00f3c c\u1ee7a h\u1ecd m\u1edbi l\u00e0 ng\u01b0\u1eddi quy\u1ebft \u0111\u1ecbnh.<\/p>\n <p>V\u00ec v\u1eady, c\u00e2u h\u1ecfi c\u1ed1t l\u00f5i kh\u00f4ng ph\u1ea3i l\u00e0 \u201cc\u1ea3m bi\u1ebfn ti\u1ebfp x\u00fac hay c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n?\u201d, m\u00e0 l\u00e0 \u201cc\u00e1c bi\u1ebfn th\u1ec3 n\u00e0o trong t\u1eebng d\u00f2ng s\u1ea3n ph\u1ea9m?\u201d. \u0110\u00f3 ch\u00ednh l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh th\u00e0nh b\u1ea1i trong vi\u1ec7c gi\u00e0nh \u0111\u01b0\u1ee3c \u0111\u01a1n h\u00e0ng:<\/p>\n <div class=\"rich-table\">\n <p class=\"rich-table-title\">Ma tr\u1eadn c\u1ed5 phi\u1ebfu hai d\u00f2ng, theo h\u1ed3 s\u01a1 nhu c\u1ea7u<\/p>\n <div class=\"table-wrapper\"><table>\n <thead><tr><th>D\u00f2ng<\/th><th>Nh\u1eefng s\u1ea3n ph\u1ea9m n\u00e0o lu\u00f4n b\u00e1n ch\u1ea1y?<\/th><th>Nh\u1eefng m\u1eb7t h\u00e0ng b\u00e1n ch\u1eadm nh\u01b0ng mang l\u1ea1i l\u1ee3i nhu\u1eadn cao<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Lo\u1ea1i h\u00ecnh tr\u1ee5 c\u1ea3m \u1ee9ng (M8 \/ M12 \/ M18 \/ M30)<\/td><td>DC 3 d\u00e2y, NPN v\u00e0 PNP, NO: th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt m\u1eb7c \u0111\u1ecbnh khi l\u1eafp r\u00e1p m\u00e1y<\/td><td>C\u00e1c phi\u00ean b\u1ea3n AC 2 d\u00e2y v\u00e0 NC: d\u00f9ng \u0111\u1ec3 thay th\u1ebf cho m\u00e1y c\u0169, b\u00e1o gi\u00e1 theo m\u00e3 s\u1ea3n ph\u1ea9m, t\u1ef7 l\u1ec7 thay th\u1ebf th\u1ea5p<\/td><\/tr>\n <tr><td>Quang \u0111i\u1ec7n (h\u00ecnh tr\u1ee5, d\u00f2ng m\u1ed9t chi\u1ec1u)<\/td><td>Lo\u1ea1i t\u00e1n x\u1ea1 (t\u1ea7m ng\u1eafn) v\u00e0 ph\u1ea3n x\u1ea1 ng\u01b0\u1ee3c (\u22481\u20132 m) v\u1edbi t\u00f9y ch\u1ecdn ph\u00e2n c\u1ef1c: c\u00e1c s\u1ea3n ph\u1ea9m ch\u1ee7 l\u1ef1c trong l\u0129nh v\u1ef1c \u0111\u00f3ng g\u00f3i v\u00e0 b\u0103ng t\u1ea3i<\/td><td>C\u00e1c c\u1eb7p c\u1ea3m bi\u1ebfn xuy\u00ean tia v\u00e0 lo\u1ea1i c\u00f3 d\u1ea5u m\u00e0u\/lo\u1ea1i \u0111\u1eb7c bi\u1ec7t: t\u00f9y theo d\u1ef1 \u00e1n, \u0111\u1eb7t h\u00e0ng theo y\u00eau c\u1ea7u<\/td><\/tr>\n <tr><td>C\u00e1c bi\u1ebfn th\u1ec3 \u0111\u1ea7u ra tr\u00ean c\u1ea3 hai<\/td><td>- C\u00e1c m\u00e3 s\u1ea3n ph\u1ea9m c\u00f9ng d\u00f2ng c\u00f3 k\u00fd hi\u1ec7u -N v\u00e0 -P \u0111\u01b0\u1ee3c l\u01b0u kho c\u00f9ng nhau; n\u1ebfu thi\u1ebfu m\u1ed9t trong hai m\u00e3 n\u00e0y, \u0111\u01a1n h\u00e0ng s\u1ebd b\u1ecb h\u1ee7y<\/td><td>C\u00e1c m\u00f4 h\u00ecnh NO + NC ho\u1eb7c m\u00f4 h\u00ecnh \u0111\u1ea7u ra b\u1ed5 sung d\u00e0nh cho c\u00e1c d\u1ef1 \u00e1n n\u00e2ng c\u1ea5p c\u00f3 y\u00eau c\u1ea7u logic nghi\u00eam ng\u1eb7t<\/td><\/tr>\n <\/tbody>\n <\/table><\/div>\n <\/div>\n <p>Hai l\u01b0u \u00fd th\u1ef1c ti\u1ec5n t\u1eeb c\u00e1c ph\u1ea7n tr\u01b0\u1edbc. Th\u1ee9 nh\u1ea5t, th\u1ecb tr\u01b0\u1eddng thay th\u1ebf l\u00e0 ngu\u1ed3n l\u1ee3i nhu\u1eadn, ch\u1ee9 kh\u00f4ng ph\u1ea3i g\u00e1nh n\u1eb7ng. C\u1ea3m bi\u1ebfn c\u1ea3m \u1ee9ng hai d\u00e2y AC m\u00e0 kh\u00e1ch h\u00e0ng \u201ckh\u00f4ng th\u1ec3 t\u00ecm th\u1ea5y \u1edf \u0111\u00e2u c\u1ea3\u201d ch\u00ednh l\u00e0 m\u00e3 s\u1ea3n ph\u1ea9m (SKU) n\u1eb1m \u1edf r\u00eca danh m\u1ee5c s\u1ea3n ph\u1ea9m, c\u00f3 bi\u00ean l\u1ee3i nhu\u1eadn cao nh\u1ea5t v\u00e0 g\u1eafn li\u1ec1n v\u1edbi s\u1ef1 trung th\u00e0nh l\u1edbn nh\u1ea5t c\u1ee7a kh\u00e1ch h\u00e0ng. Th\u1ee9 hai, khi kh\u00e1ch h\u00e0ng h\u1ecfi \u201cc\u1ea3m bi\u1ebfn ti\u1ec7m c\u1eadn hay c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n?\u201d, \u0111\u1eebng tr\u1ea3 l\u1eddi b\u1eb1ng m\u1ed9t b\u00e0i gi\u1ea3ng d\u00e0i d\u00f2ng. B\u1ed1n c\u00e2u tr\u1ea3 l\u1eddi s\u1ebd d\u1eabn \u0111\u1ebfn m\u1ed9t d\u00f2ng s\u1ea3n ph\u1ea9m, sau \u0111\u00f3 l\u00e0 m\u1ed9t lo\u1ea1i, r\u1ed3i \u0111\u1ebfn m\u00e3 s\u1ea3n ph\u1ea9m, v\u00e0 cu\u1ed9c tr\u00f2 chuy\u1ec7n s\u1ebd chuy\u1ec3n t\u1eeb vi\u1ec7c gi\u1ea3i th\u00edch sang \u0111\u1eb7t h\u00e0ng. Trong khi \u0111\u00f3, vi\u1ec7c d\u1ef1 tr\u1eef c\u1ea3 hai d\u00f2ng s\u1ea3n ph\u1ea9m t\u1eeb c\u00f9ng m\u1ed9t nh\u00e0 cung c\u1ea5p c\u00f3 ngh\u0129a l\u00e0 ch\u1ec9 c\u1ea7n m\u1ed9t \u0111\u01a1n \u0111\u1eb7t h\u00e0ng (PO), m\u1ed9t th\u1eddi gian ch\u1edd giao h\u00e0ng v\u00e0 c\u01b0\u1edbc v\u1eadn chuy\u1ec3n h\u1ed7n h\u1ee3p: s\u1ef1 h\u1ee3p nh\u1ea5t n\u00e0y ch\u00ednh l\u00e0 y\u1ebfu t\u1ed1 gi\u00fap m\u1ed9t nh\u00e0 cung c\u1ea5p \u0111a n\u0103ng quy m\u00f4 nh\u1ecf c\u00f3 th\u1ec3 sinh l\u1eddi ngay t\u1eeb \u0111\u1ea7u.<\/p>\n\n <!-- BP-3 (Replaces: \"Answer with four questions: what material, how far the gap, what PLC or supply (NPN, PNP or AC), how dirty the site.\") -->\n <div class=\"bp-3-questions\">\n <p class=\"bp-3-questions-title\"><span class=\"bp-3-questions-ticon\"><svg viewbox=\"0 0 24 24\" width=\"18\" height=\"18\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><path d=\"M14 9a2 2 0 0 1-2 2H6l-4 4V4a2 2 0 0 1 2-2h8a2 2 0 0 1 2 2z\"\/><path d=\"M18 9h2a2 2 0 0 1 2 2v11l-4-4h-6a2 2 0 0 1-2-2v-1\"\/><\/svg><\/span>Chuy\u1ec3n c\u00e2u h\u1ecfi \u201cc\u1ea3m bi\u1ebfn ti\u1ec7m c\u1eadn hay c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n?\u201d th\u00e0nh b\u1ed1n c\u00e2u h\u1ecfi<\/p>\n <div class=\"bp-3-questions-grid\">\n <div class=\"bp-3-q\"><span class=\"bp-3-q-n\">1<\/span><p class=\"bp-3-q-t\"><strong>Ch\u1ea5t li\u1ec7u:<\/strong> M\u1ee5c ti\u00eau l\u00e0 g\u00ec?<\/p><\/div>\n <div class=\"bp-3-q\"><span class=\"bp-3-q-n\">2<\/span><p class=\"bp-3-q-t\"><strong>Kho\u1ea3ng c\u00e1ch:<\/strong> M\u1eb7t c\u00f3 th\u1ec3 l\u00f9i v\u00e0o trong \u0111\u01b0\u1ee3c bao xa?<\/p><\/div>\n <div class=\"bp-3-q\"><span class=\"bp-3-q-n\">3<\/span><p class=\"bp-3-q-t\"><strong>\u0110i\u1ec7n \u00e1p \u0111\u1ea7u ra:<\/strong> NPN, PNP hay AC?<\/p><\/div>\n <div class=\"bp-3-q\"><span class=\"bp-3-q-n\">4<\/span><p class=\"bp-3-q-t\"><strong>M\u00f4i tr\u01b0\u1eddng:<\/strong> Khu v\u1ef1c \u0111\u00f3 b\u1ea9n \u0111\u1ebfn m\u1ee9c n\u00e0o?<\/p><\/div>\n <\/div>\n <\/div>\n\n <p>Khi nh\u1eadn \u0111\u01b0\u1ee3c b\u1ed1n c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00f3, vi\u1ec7c so s\u00e1nh ch\u00fang v\u1edbi m\u1ed9t m\u1eabu thi\u1ebft k\u1ebf m\u1edbi ch\u00ednh l\u00e0 c\u00f4ng vi\u1ec7c th\u1ef1c s\u1ef1. D\u1ecbch v\u1ee5 l\u1ef1a ch\u1ecdn d\u1ef1a tr\u00ean th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 b\u1ea3n v\u1ebd ra \u0111\u1eddi ch\u00ednh l\u00e0 \u0111\u1ec3 ph\u1ee5c v\u1ee5 m\u1ee5c \u0111\u00edch \u0111\u00f3 t\u1ea1i <a href=\"https:\/\/www.omch.com\/vi\/product-selection\/\">OMCH<\/a>: H\u00e3y g\u1eedi b\u1ed1n c\u00e2u tr\u1ea3 l\u1eddi, ho\u1eb7c \u1ea3nh ch\u1ee5p b\u1ed9 ph\u1eadn b\u1ecb h\u1ecfng c\u00f9ng h\u1ec7 th\u1ed1ng d\u00e2y d\u1eabn c\u1ee7a n\u00f3, v\u00e0 b\u1ea1n s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c m\u1eabu s\u1ea3n ph\u1ea9m t\u01b0\u01a1ng \u1ee9ng. Vi\u1ec7c ki\u1ec3m tra m\u1eabu \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u01b0\u1edbc khi b\u1ea1n x\u00e1c nh\u1eadn \u0111\u1eb7t ch\u1ed7 container. \u0110\u00e2y ch\u00ednh l\u00e0 b\u1ed9 c\u00e2u h\u1ecfi m\u00e0 \u0111\u1ed9i ng\u0169 tuy\u1ec3n ch\u1ecdn c\u1ee7a ch\u00fang t\u00f4i \u0111\u1eb7t ra h\u00e0ng ng\u00e0y, b\u1edfi ch\u00fang l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a b\u00e0i vi\u1ebft n\u00e0y: v\u1eadt li\u1ec7u, khe h\u1edf, \u0111\u1ea7u ra, m\u00f4i tr\u01b0\u1eddng. Vi\u1ec7c m\u1ed9t nh\u00e0 cung c\u1ea5p duy nh\u1ea5t s\u1edf h\u1eefu c\u1ea3 ph\u01b0\u01a1ng ti\u1ec7n c\u1ea3m bi\u1ebfn l\u1eabn c\u00e1c bi\u1ebfn th\u1ec3 \u0111\u1ea7u ra t\u01b0\u01a1ng \u1ee9ng c\u00f3 ngh\u0129a l\u00e0 t\u00ecnh hu\u1ed1ng tranh lu\u1eadn m\u00e0 b\u1ea1n v\u1eeba \u0111\u1ecdc s\u1ebd kh\u00f4ng bao gi\u1edd x\u1ea3y ra khi ph\u1ea3i l\u00e0m vi\u1ec7c v\u1edbi ba nh\u00e0 cung c\u1ea5p kh\u00e1c nhau.<\/p>\n <p>M\u1ed9t g\u00f3c nh\u00ecn t\u1ed5ng quan d\u00e0nh cho nh\u1eefng ai mua, l\u01b0u kho ho\u1eb7c b\u00e1o gi\u00e1 c\u1ea3m bi\u1ebfn: c\u1ea3m bi\u1ebfn ti\u1ec7m c\u1eadn v\u00e0 c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n kh\u00f4ng ph\u1ea3i l\u00e0 cu\u1ed9c so t\u00e0i c\u00f4ng ngh\u1ec7. \u0110\u00f3 l\u00e0 m\u1ed9t \u0111i\u1ec3m ph\u00e1t hi\u1ec7n y\u00eau c\u1ea7u b\u1ea1n cung c\u1ea5p b\u1ed1n th\u00f4ng s\u1ed1. N\u1ebfu d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t (ho\u1eb7c kho h\u00e0ng) c\u1ee7a b\u1ea1n cu\u1ed1i c\u00f9ng c\u1ea7n c\u1ea3 c\u1ea3m bi\u1ebfn c\u1ea3m \u1ee9ng M18 cho m\u00e1y \u00e9p v\u00e0 c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n khu\u1ebfch t\u00e1n cho d\u00e2y chuy\u1ec1n \u0111\u00f3ng g\u00f3i, th\u00ec \u0111\u00f3 ch\u00ednh l\u00e0 tr\u01b0\u1eddng h\u1ee3p m\u00e0 m\u1ed9t nh\u00e0 cung c\u1ea5p c\u00f3 h\u01a1n 3.000 SKU thu\u1ed9c 30 danh m\u1ee5c linh ki\u1ec7n t\u1ef1 \u0111\u1ed9ng h\u00f3a s\u1ebd gi\u00fap b\u1ea1n ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c \u0111\u01a1n \u0111\u1eb7t h\u00e0ng th\u1ee9 hai v\u00e0 h\u00f3a \u0111\u01a1n v\u1eadn chuy\u1ec3n th\u1ee9 hai. \u0110i\u1ec1u n\u00e0y c\u0169ng gi\u00fap tr\u00e1nh \u0111\u01b0\u1ee3c cu\u1ed9c tranh lu\u1eadn th\u1ee9 hai v\u1ec1 vi\u1ec7c c\u1ea3m bi\u1ebfn n\u00e0o t\u1ed1t h\u01a1n. Ch\u1ec9 c\u1ea7n g\u1eedi danh s\u00e1ch th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 nh\u1eadn b\u00e1o gi\u00e1 trong m\u1ed9t l\u1ea7n duy nh\u1ea5t: <a href=\"https:\/\/www.omch.com\/vi\/contact\/\">y\u00eau c\u1ea7u OMCH cung c\u1ea5p<\/a>.<\/p>\n\n <!-- BP-cta-end -->\n <div class=\"bp-cta-end\">\n <p class=\"bp-cta-end-title\"><span class=\"bp-cta-end-ticon\"><svg viewbox=\"0 0 24 24\" width=\"22\" height=\"22\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><path d=\"M14.536 21.686a.5.5 0 0 0 .937-.024l6.5-19a.496.496 0 0 0-.635-.635l-19 6.5a.5.5 0 0 0-.024.937l7.93 3.18a2 2 0 0 1 1.112 1.11l3.18 7.932z\"\/><path d=\"m21.854 2.147-13 13\"\/><\/svg><\/span>Xem c\u00e1c \u0111i\u1ec1u kho\u1ea3n d\u00e0nh cho nh\u00e0 ph\u00e2n ph\u1ed1i c\u1ee7a c\u1ea3 hai d\u00f2ng s\u1ea3n ph\u1ea9m c\u1ea3m bi\u1ebfn<\/p>\n <p class=\"bp-cta-end-sub\">C\u00e1c lo\u1ea1i c\u1ea3m bi\u1ebfn \u0111i\u1ec7n t\u1eeb M8\u2013M30 v\u00e0 c\u00e1c m\u1eabu c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n khu\u1ebfch t\u00e1n, ph\u1ea3n x\u1ea1 ng\u01b0\u1ee3c v\u00e0 ch\u00f9m xuy\u00ean \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y song song, k\u00e8m theo c\u00e1c bi\u1ebfn th\u1ec3 NPN\/PNP v\u00e0 AC hai d\u00e2y, h\u01b0\u1edbng d\u1eabn \u0111\u1ed1i chi\u1ebfu m\u00e3 s\u1ea3n ph\u1ea9m g\u1ed1c c\u1ee7a m\u00e1y, c\u00f9ng v\u1edbi b\u1ea3ng ki\u1ec3m tra g\u1ed3m b\u1ed1n c\u00e2u h\u1ecfi cho m\u1ed7i b\u00e1o gi\u00e1.<\/p>\n <a class=\"bp-cta-end-btn\" href=\"https:\/\/www.omch.com\/vi\/contact\/\">Y\u00eau c\u1ea7u b\u00e1o gi\u00e1 t\u1eeb nh\u00e0 ph\u00e2n ph\u1ed1i<\/a>\n <\/div>\n\n <h2>T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n <ol class=\"bd-refs\">\n <li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Photoelectric_sensor\">C\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n<\/a><\/li>\n <li><a href=\"https:\/\/www.eng-tips.com\/threads\/looking-to-replace-inductive-prox-switch-in-demanding-application.528519\/\">\u0110ang t\u00ecm ki\u1ebfm gi\u1ea3i ph\u00e1p thay th\u1ebf cho c\u00f4ng t\u1eafc c\u1ea3m \u1ee9ng trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 y\u00eau c\u1ea7u kh\u1eaft khe<\/a>, 2025<\/li>\n <li><a href=\"https:\/\/www.reddit.com\/r\/PLC\/comments\/n34gqf\/what_things_do_you_need_to_think_about_to_replace\/\">B\u1ea1n c\u1ea7n l\u01b0u \u00fd nh\u1eefng \u0111i\u1ec1u g\u00ec khi thay th\u1ebf c\u1ea3m bi\u1ebfn h\u00ecnh \u1ea3nh tr\u00ean m\u00e1y?<\/a>, 2021<\/li>\n <li><a href=\"https:\/\/www.reddit.com\/r\/CNC\/comments\/oubafe\/proximity_sensor_not_working_properly_it_keeps\/\">C\u1ea3m bi\u1ebfn kho\u1ea3ng c\u00e1ch kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng<\/a>, 2021<\/li>\n <li><a href=\"https:\/\/www.omch.com\/vi\/product-selection\/\">D\u1ecbch v\u1ee5 L\u1ef1a ch\u1ecdn S\u1ea3n ph\u1ea9m c\u1ee7a OMCH<\/a><\/li>\n <li><a href=\"https:\/\/www.omch.com\/vi\/proximity-sensor\/\">D\u00f2ng c\u1ea3m bi\u1ebfn ti\u1ec7m c\u1eadn OMCH<\/a><\/li>\n <li><a href=\"https:\/\/www.omch.com\/vi\/contact\/\">Li\u00ean h\u1ec7 v\u1edbi OMCH<\/a><\/li>\n <\/ol>\n <\/article>\n<\/div>\n<!-- \u2191\u2191\u2191 Fragment ends here. \u2191\u2191\u2191 -->\n<\/body><\/html>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>C\u1ea3m bi\u1ebfn ti\u1ec7m c\u1eadn so v\u1edbi c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n: H\u00e3y \u0111\u1ec3 v\u1eadt li\u1ec7u, kho\u1ea3ng c\u00e1ch v\u00e0 t\u00edn hi\u1ec7u \u0111\u1ea7u ra quy\u1ebft \u0111\u1ecbnh H\u1ecfi m\u01b0\u1eddi nh\u00e0 cung c\u1ea5p t\u1ef1 \u0111\u1ed9ng h\u00f3a xem c\u1ea3m bi\u1ebfn n\u00e0o \u201ct\u1ed1t h\u01a1n\u201d (c\u1ea3m bi\u1ebfn ti\u1ec7m c\u1eadn so v\u1edbi c\u1ea3m bi\u1ebfn quang \u0111i\u1ec7n), b\u1ea1n s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c m\u01b0\u1eddi c\u00e2u tr\u1ea3 l\u1eddi t\u1ef1 tin nh\u01b0ng m\u00e2u thu\u1eabn. Thay v\u00e0o \u0111\u00f3, h\u00e3y h\u1ecfi ch\u00ednh chi\u1ebfc m\u00e1y, v\u00e0 tranh c\u00e3i \u0111\u00f3 h\u1ea7u nh\u01b0 s\u1ebd bi\u1ebfn m\u1ea5t. M\u1ed9t ch\u00f9m tia quang \u0111i\u1ec7n d\u00e0i 5 m kh\u00f4ng t\u1ed1t h\u01a1n m\u1ed9t thi\u1ebft b\u1ecb c\u1ea3m bi\u1ebfn c\u1ea3m \u1ee9ng c\u00f3 kho\u1ea3ng c\u00e1ch 5 mm; [\u2026]<\/p>","protected":false},"author":4,"featured_media":12216,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Proximity Sensor vs Photoelectric Sensor: Key Differences","_seopress_titles_desc":"Compare proximity and photoelectric sensors by sensing range, target material, output, environment, and application to choose the right sensor.","_seopress_robots_index":"","footnotes":""},"categories":[79],"tags":[],"class_list":["post-12212","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mmlblog"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12212","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/comments?post=12212"}],"version-history":[{"count":2,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12212\/revisions"}],"predecessor-version":[{"id":12225,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12212\/revisions\/12225"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media\/12216"}],"wp:attachment":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media?parent=12212"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/categories?post=12212"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/tags?post=12212"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}