{"id":44244,"date":"2023-04-25T16:18:23","date_gmt":"2023-04-25T21:18:23","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/what-is-a-piezoelectric-sensor\/"},"modified":"2025-01-21T07:28:20","modified_gmt":"2025-01-21T12:28:20","slug":"what-is-a-piezoelectric-sensor","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/what-is-a-piezoelectric-sensor\/","title":{"rendered":"C\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n: Nguy\u00ean l\u00fd v\u00e0 \u1ee9ng d\u1ee5ng"},"content":{"rendered":"<p>Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt l\u00fd \u0111\u1eb7c bi\u1ec7t, l\u00e0 n\u1ec1n t\u1ea3ng cho ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n.  Hi\u1ec7u \u1ee9ng n\u00e0y m\u00f4 t\u1ea3 kh\u1ea3 n\u0103ng c\u1ee7a m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u nh\u1ea5t \u0111\u1ecbnh t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a \u00e1p l\u1ef1c c\u01a1 h\u1ecdc, v\u00e0 ng\u01b0\u1ee3c l\u1ea1i, bi\u1ebfn d\u1ea1ng khi c\u00f3 \u0111i\u1ec7n tr\u01b0\u1eddng t\u00e1c \u0111\u1ed9ng l\u00ean ch\u00fang.  C\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n ch\u00ednh l\u00e0 thi\u1ebft b\u1ecb t\u1eadn d\u1ee5ng hi\u1ec7u \u1ee9ng n\u00e0y \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc th\u00e0nh n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n, ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i. Nh\u1edd t\u00ednh linh ho\u1ea1t v\u00e0 \u0111\u1ed9 nh\u1ea1y cao, c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c, t\u1eeb y t\u1ebf \u0111\u1ebfn c\u00f4ng nghi\u1ec7p.<\/p>\n<h3>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng<\/h3>\n<p>C\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd c\u1ee7a hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n. Khi m\u1ed9t v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n b\u1ecb n\u00e9n ho\u1eb7c k\u00e9o gi\u00e3n, s\u1ef1 thay \u0111\u1ed5i trong c\u1ea5u tr\u00fac tinh th\u1ec3 c\u1ee7a n\u00f3 s\u1ebd t\u1ea1o ra m\u1ed9t \u0111i\u1ec7n \u00e1p tr\u00ean b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u. \u0110i\u1ec7n \u00e1p n\u00e0y t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi l\u1ef1c t\u00e1c \u0111\u1ed9ng, ngh\u0129a l\u00e0 l\u1ef1c c\u00e0ng l\u1edbn th\u00ec \u0111i\u1ec7n \u00e1p t\u1ea1o ra c\u00e0ng cao. Ng\u01b0\u1ee3c l\u1ea1i, khi m\u1ed9t \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c \u0111\u1eb7t v\u00e0o v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n, n\u00f3 s\u1ebd l\u00e0m thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc c\u1ee7a v\u1eadt li\u1ec7u.<\/p>\n<h3>C\u1ea5u t\u1ea1o c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n<\/h3>\n<p>C\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n th\u01b0\u1eddng \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o t\u1eeb c\u00e1c v\u1eadt li\u1ec7u nh\u01b0 th\u1ea1ch anh, g\u1ed1m \u00e1p \u0111i\u1ec7n (nh\u01b0 PZT &#8211; Lead Zirconate Titanate), ho\u1eb7c polymer \u00e1p \u0111i\u1ec7n (nh\u01b0 PVDF &#8211; Polyvinylidene Fluoride).  V\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c k\u1eb9p gi\u1eefa hai \u0111i\u1ec7n c\u1ef1c \u0111\u1ec3 thu th\u1eadp \u0111i\u1ec7n \u00e1p t\u1ea1o ra.  T\u00f9y thu\u1ed9c v\u00e0o \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3, c\u1ea5u t\u1ea1o c\u1ee7a c\u1ea3m bi\u1ebfn c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf kh\u00e1c nhau \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t.<\/p>\n<h3>C\u00e1c lo\u1ea1i c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n<\/h3>\n<p>C\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n c\u00f3 nhi\u1ec1u lo\u1ea1i kh\u00e1c nhau, \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i d\u1ef1a tr\u00ean c\u1ea5u tr\u00fac v\u00e0 ch\u1ee9c n\u0103ng:<\/p>\n<ul>\n<li><strong>C\u1ea3m bi\u1ebfn l\u1ef1c:<\/strong> \u0110o l\u1ef1c t\u00e1c \u0111\u1ed9ng l\u00ean b\u1ec1 m\u1eb7t c\u1ea3m bi\u1ebfn.<\/li>\n<li><strong>C\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t:<\/strong> \u0110o \u00e1p su\u1ea5t c\u1ee7a ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed.<\/li>\n<li><strong>C\u1ea3m bi\u1ebfn gia t\u1ed1c:<\/strong> \u0110o gia t\u1ed1c v\u00e0 rung \u0111\u1ed9ng.<\/li>\n<li><strong>C\u1ea3m bi\u1ebfn \u00e2m thanh:<\/strong>  Chuy\u1ec3n \u0111\u1ed5i s\u00f3ng \u00e2m thanh th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n.  V\u00ed d\u1ee5, m\u1ed9t s\u1ed1 lo\u1ea1i c\u1ea3m bi\u1ebfn si\u00eau \u00e2m s\u1eed d\u1ee5ng nguy\u00ean l\u00fd \u00e1p \u0111i\u1ec7n.<\/li>\n<\/ul>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Lo\u1ea1i c\u1ea3m bi\u1ebfn<\/th>\n<th>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng<\/th>\n<th>\u1ee8ng d\u1ee5ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>C\u1ea3m bi\u1ebfn l\u1ef1c<\/td>\n<td>\u0110o bi\u1ebfn d\u1ea1ng c\u1ee7a v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a l\u1ef1c<\/td>\n<td>C\u00e2n \u0111i\u1ec7n t\u1eed, c\u1ea3m bi\u1ebfn l\u1ef1c va ch\u1ea1m<\/td>\n<\/tr>\n<tr>\n<td>C\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t<\/td>\n<td>\u0110o \u00e1p su\u1ea5t t\u00e1c \u0111\u1ed9ng l\u00ean m\u00e0ng \u00e1p \u0111i\u1ec7n<\/td>\n<td>\u0110o huy\u1ebft \u00e1p, \u0111o \u00e1p su\u1ea5t l\u1ed1p xe<\/td>\n<\/tr>\n<tr>\n<td>C\u1ea3m bi\u1ebfn gia t\u1ed1c<\/td>\n<td>\u0110o gia t\u1ed1c t\u00e1c \u0111\u1ed9ng l\u00ean kh\u1ed1i l\u01b0\u1ee3ng g\u1eafn v\u1edbi v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n<\/td>\n<td>H\u1ec7 th\u1ed1ng t\u00fai kh\u00ed, \u0111o rung \u0111\u1ed9ng m\u00e1y m\u00f3c<\/td>\n<\/tr>\n<tr>\n<td>C\u1ea3m bi\u1ebfn \u00e2m thanh<\/td>\n<td>\u0110o bi\u1ebfn d\u1ea1ng c\u1ee7a v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n do s\u00f3ng \u00e2m thanh<\/td>\n<td>Micro, loa, m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng si\u00eau \u00e2m<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u01afu \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m<\/h3>\n<p><strong>\u01afu \u0111i\u1ec3m:<\/strong><\/p>\n<ul>\n<li>\u0110\u1ed9 nh\u1ea1y cao: C\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n nh\u1eefng thay \u0111\u1ed5i r\u1ea5t nh\u1ecf v\u1ec1 l\u1ef1c, \u00e1p su\u1ea5t, ho\u1eb7c gia t\u1ed1c.<\/li>\n<li>D\u1ea3i t\u1ea7n s\u1ed1 r\u1ed9ng:  Ph\u1ea3n \u1ee9ng nhanh v\u1edbi nh\u1eefng thay \u0111\u1ed5i nhanh ch\u00f3ng.<\/li>\n<li>K\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn:  D\u1ec5 d\u00e0ng t\u00edch h\u1ee3p v\u00e0o c\u00e1c h\u1ec7 th\u1ed1ng kh\u00e1c nhau.<\/li>\n<\/ul>\n<p><strong>Nh\u01b0\u1ee3c \u0111i\u1ec3m:<\/strong><\/p>\n<ul>\n<li>Nh\u1ea1y c\u1ea3m v\u1edbi nhi\u1ec7t \u0111\u1ed9:  Hi\u1ec7u su\u1ea5t c\u00f3 th\u1ec3 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi s\u1ef1 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9.<\/li>\n<li>Kh\u00f4ng ph\u00f9 h\u1ee3p cho \u0111o l\u1ef1c t\u0129nh:  Ch\u1ec9 \u0111o \u0111\u01b0\u1ee3c s\u1ef1 thay \u0111\u1ed5i c\u1ee7a l\u1ef1c, kh\u00f4ng \u0111o \u0111\u01b0\u1ee3c l\u1ef1c t\u0129nh.<\/li>\n<li>M\u1ed9t s\u1ed1 lo\u1ea1i v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n c\u00f3 th\u1ec3 b\u1ecb l\u00e3o h\u00f3a theo th\u1eddi gian.<\/li>\n<\/ul>\n<p>T\u00f3m l\u1ea1i, c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n l\u00e0 m\u1ed9t lo\u1ea1i c\u1ea3m bi\u1ebfn \u0111a n\u0103ng v\u00e0 hi\u1ec7u qu\u1ea3, \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c nh\u1edd kh\u1ea3 n\u0103ng chuy\u1ec3n \u0111\u1ed5i gi\u1eefa n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc v\u00e0 n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n.  Hi\u1ec3u r\u00f5 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng, c\u1ea5u t\u1ea1o v\u00e0 \u0111\u1eb7c t\u00ednh c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 l\u1ef1a ch\u1ecdn v\u00e0 s\u1eed d\u1ee5ng ch\u00fang m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.  S\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng ngh\u1ec7 v\u1eadt li\u1ec7u v\u00e0 k\u1ef9 thu\u1eadt ch\u1ebf t\u1ea1o \u0111ang li\u00ean t\u1ee5c c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 m\u1edf r\u1ed9ng \u1ee9ng d\u1ee5ng c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n trong t\u01b0\u01a1ng lai.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt l\u00fd \u0111\u1eb7c bi\u1ec7t, l\u00e0 n\u1ec1n t\u1ea3ng cho ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n. Hi\u1ec7u \u1ee9ng n\u00e0y m\u00f4 t\u1ea3 kh\u1ea3 n\u0103ng c\u1ee7a m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u nh\u1ea5t \u0111\u1ecbnh t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a \u00e1p l\u1ef1c c\u01a1 h\u1ecdc, v\u00e0 ng\u01b0\u1ee3c l\u1ea1i, bi\u1ebfn d\u1ea1ng khi<\/p>\n","protected":false},"author":1,"featured_media":1505,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-44244","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\/44244","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=44244"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/44244\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/1505"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=44244"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=44244"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=44244"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}