{"id":50228,"date":"2023-04-21T15:13:50","date_gmt":"2023-04-21T20:13:50","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-check-piezoelectric-sensor\/"},"modified":"2025-01-21T07:13:53","modified_gmt":"2025-01-21T12:13:53","slug":"how-to-check-piezoelectric-sensor","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-to-check-piezoelectric-sensor\/","title":{"rendered":"Ki\u1ec3m tra c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n: H\u01b0\u1edbng d\u1eabn chi ti\u1ebft"},"content":{"rendered":"<p>C\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n l\u00e0 m\u1ed9t lo\u1ea1i c\u1ea3m bi\u1ebfn chuy\u1ec3n \u0111\u1ed5i \u00e1p l\u1ef1c c\u01a1 h\u1ecdc th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n. Vi\u1ec7c ki\u1ec3m tra c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n \u0111\u1ecbnh k\u1ef3 l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng ch\u00ednh x\u00e1c v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a h\u1ec7 th\u1ed1ng s\u1eed d\u1ee5ng ch\u00fang. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd h\u01b0\u1edbng d\u1eabn chi ti\u1ebft c\u00e1ch ki\u1ec3m tra c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n, t\u1eeb nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p \u0111\u01a1n gi\u1ea3n \u0111\u1ebfn nh\u1eefng k\u1ef9 thu\u1eadt chuy\u00ean s\u00e2u h\u01a1n.<\/p>\n<h3>Ki\u1ec3m tra b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng<\/h3>\n<p>\u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra c\u01a1 b\u1ea3n nh\u1ea5t, s\u1eed d\u1ee5ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng \u0111\u1ec3 \u0111o \u0111i\u1ec7n tr\u1edf v\u00e0 \u0111i\u1ec7n \u00e1p c\u1ee7a c\u1ea3m bi\u1ebfn. \u0110\u1eb7t \u0111\u1ed3ng h\u1ed3 \u1edf ch\u1ebf \u0111\u1ed9 \u0111o \u0111i\u1ec7n tr\u1edf (Ohmmeter) v\u00e0 ch\u1ea1m hai que \u0111o v\u00e0o hai \u0111\u1ea7u d\u00e2y c\u1ee7a c\u1ea3m bi\u1ebfn. M\u1ed9t c\u1ea3m bi\u1ebfn t\u1ed1t s\u1ebd hi\u1ec3n th\u1ecb \u0111i\u1ec7n tr\u1edf r\u1ea5t cao, th\u01b0\u1eddng l\u00e0 megaohm. Sau \u0111\u00f3, chuy\u1ec3n sang ch\u1ebf \u0111\u1ed9 \u0111o \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u (AC Voltage) v\u00e0 t\u00e1c d\u1ee5ng m\u1ed9t l\u1ef1c nh\u1eb9 l\u00ean c\u1ea3m bi\u1ebfn. \u0110\u1ed3ng h\u1ed3 s\u1ebd hi\u1ec3n th\u1ecb m\u1ed9t \u0111i\u1ec7n \u00e1p nh\u1ecf, ch\u1ee9ng t\u1ecf c\u1ea3m bi\u1ebfn \u0111ang ho\u1ea1t \u0111\u1ed9ng.<\/p>\n<h3>Ki\u1ec3m tra b\u1eb1ng m\u00e1y hi\u1ec7n s\u00f3ng<\/h3>\n<p>M\u00e1y hi\u1ec7n s\u00f3ng (oscilloscope) cho ph\u00e9p quan s\u00e1t d\u1ea1ng s\u00f3ng v\u00e0 bi\u00ean \u0111\u1ed9 c\u1ee7a t\u00edn hi\u1ec7u \u0111i\u1ec7n do c\u1ea3m bi\u1ebfn t\u1ea1o ra. K\u1ebft n\u1ed1i c\u1ea3m bi\u1ebfn v\u1edbi m\u00e1y hi\u1ec7n s\u00f3ng v\u00e0 t\u00e1c d\u1ee5ng l\u1ef1c l\u00ean c\u1ea3m bi\u1ebfn. Quan s\u00e1t d\u1ea1ng s\u00f3ng tr\u00ean m\u00e0n h\u00ecnh. M\u1ed9t c\u1ea3m bi\u1ebfn ho\u1ea1t \u0111\u1ed9ng t\u1ed1t s\u1ebd t\u1ea1o ra d\u1ea1ng s\u00f3ng r\u00f5 r\u00e0ng, t\u01b0\u01a1ng \u1ee9ng v\u1edbi l\u1ef1c t\u00e1c d\u1ee5ng.<\/p>\n<h3>Ki\u1ec3m tra b\u1eb1ng m\u1ea1ch so s\u00e1nh<\/h3>\n<p>M\u1ea1ch so s\u00e1nh c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ki\u1ec3m tra xem t\u00edn hi\u1ec7u \u0111\u1ea7u ra c\u1ee7a c\u1ea3m bi\u1ebfn c\u00f3 v\u01b0\u1ee3t qu\u00e1 m\u1ed9t ng\u01b0\u1ee1ng nh\u1ea5t \u0111\u1ecbnh hay kh\u00f4ng.  \u0110i\u1ec1u n\u00e0y h\u1eefu \u00edch trong c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u ph\u00e1t hi\u1ec7n s\u1ef1 ki\u1ec7n v\u01b0\u1ee3t ng\u01b0\u1ee1ng.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Ph\u01b0\u01a1ng ph\u00e1p<\/th>\n<th>\u01afu \u0111i\u1ec3m<\/th>\n<th>Nh\u01b0\u1ee3c \u0111i\u1ec3m<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u0110\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng<\/td>\n<td>\u0110\u01a1n gi\u1ea3n, d\u1ec5 th\u1ef1c hi\u1ec7n, chi ph\u00ed th\u1ea5p<\/td>\n<td>Ch\u1ec9 ki\u1ec3m tra \u0111\u01b0\u1ee3c c\u01a1 b\u1ea3n, kh\u00f4ng \u0111o \u0111\u01b0\u1ee3c ch\u00ednh x\u00e1c bi\u00ean \u0111\u1ed9<\/td>\n<\/tr>\n<tr>\n<td>M\u00e1y hi\u1ec7n s\u00f3ng<\/td>\n<td>Quan s\u00e1t \u0111\u01b0\u1ee3c d\u1ea1ng s\u00f3ng, \u0111o \u0111\u01b0\u1ee3c bi\u00ean \u0111\u1ed9 ch\u00ednh x\u00e1c<\/td>\n<td>Chi ph\u00ed cao, c\u1ea7n k\u1ef9 n\u0103ng s\u1eed d\u1ee5ng<\/td>\n<\/tr>\n<tr>\n<td>M\u1ea1ch so s\u00e1nh<\/td>\n<td>Ki\u1ec3m tra \u0111\u01b0\u1ee3c ng\u01b0\u1ee1ng t\u00edn hi\u1ec7u<\/td>\n<td>C\u1ea7n thi\u1ebft k\u1ebf m\u1ea1ch ph\u00f9 h\u1ee3p<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Ki\u1ec3m tra v\u1edbi thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng<\/h3>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c cao, c\u1ea7n s\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng \u0111\u1ec3 ki\u1ec3m tra c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n. C\u00e1c thi\u1ebft b\u1ecb n\u00e0y c\u00f3 th\u1ec3 \u0111o \u0111\u01b0\u1ee3c c\u00e1c th\u00f4ng s\u1ed1 nh\u01b0 \u0111\u1ed9 nh\u1ea1y, d\u1ea3i t\u1ea7n s\u1ed1, \u0111\u1ed9 tuy\u1ebfn t\u00ednh c\u1ee7a c\u1ea3m bi\u1ebfn.<\/p>\n<h3>Ki\u1ec3m tra c\u1ea3m bi\u1ebfn si\u00eau \u00e2m<\/h3>\n<p>M\u1ed9t s\u1ed1 c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng si\u00eau \u00e2m.  Vi\u1ec7c ki\u1ec3m tra ch\u00fang c\u00f3 th\u1ec3 ph\u1ee9c t\u1ea1p h\u01a1n v\u00e0 th\u01b0\u1eddng y\u00eau c\u1ea7u thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng. N\u1ebfu c\u1ea3m bi\u1ebfn si\u00eau \u00e2m c\u1ee7a b\u1ea1n l\u00e0 lo\u1ea1i ph\u00e1t\/thu, b\u1ea1n c\u00f3 th\u1ec3 ki\u1ec3m tra b\u1eb1ng c\u00e1ch g\u1eedi t\u00edn hi\u1ec7u v\u00e0 xem t\u00edn hi\u1ec7u ph\u1ea3n h\u1ed3i. Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, vi\u1ec7c ki\u1ec3m tra c\u1ea3m bi\u1ebfn si\u00eau \u00e2m c\u00f3 th\u1ec3 li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb c\u1ee7a c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t chuy\u00ean bi\u1ec7t, v\u00ed d\u1ee5 nh\u01b0 Beijing Ultrasonic, n\u1ebfu \u0111\u00f3 l\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t c\u1ee7a c\u1ea3m bi\u1ebfn. Tuy nhi\u00ean, h\u00e3y lu\u00f4n \u01b0u ti\u00ean c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra t\u1ed5ng qu\u00e1t tr\u01b0\u1edbc khi t\u00ecm \u0111\u1ebfn c\u00e1c gi\u1ea3i ph\u00e1p c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t c\u1ee5 th\u1ec3.<\/p>\n<p>Vi\u1ec7c ki\u1ec3m tra c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n \u0111\u00fang c\u00e1ch l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u00e1ng tin c\u1eady.  L\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra ph\u00f9 h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o y\u00eau c\u1ea7u c\u1ee7a \u1ee9ng d\u1ee5ng v\u00e0 ngu\u1ed3n l\u1ef1c s\u1eb5n c\u00f3. B\u1eb1ng c\u00e1ch \u00e1p d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y trong b\u00e0i vi\u1ebft n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng ki\u1ec3m tra v\u00e0 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n l\u00e0 m\u1ed9t lo\u1ea1i c\u1ea3m bi\u1ebfn chuy\u1ec3n \u0111\u1ed5i \u00e1p l\u1ef1c c\u01a1 h\u1ecdc th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n. Vi\u1ec7c ki\u1ec3m tra c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n \u0111\u1ecbnh k\u1ef3 l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng ch\u00ednh x\u00e1c v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a h\u1ec7 th\u1ed1ng s\u1eed d\u1ee5ng ch\u00fang. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd h\u01b0\u1edbng d\u1eabn chi<\/p>\n","protected":false},"author":1,"featured_media":26464,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-50228","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","prodpage-classic"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/50228","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/comments?post=50228"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/50228\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/26464"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=50228"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=50228"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=50228"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}