{"id":50324,"date":"2023-04-21T15:06:21","date_gmt":"2023-04-21T20:06:21","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-much-voltage-does-a-piezoelectric-sensor-generate\/"},"modified":"2025-01-21T07:13:32","modified_gmt":"2025-01-21T12:13:32","slug":"how-much-voltage-does-a-piezoelectric-sensor-generate","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-much-voltage-does-a-piezoelectric-sensor-generate\/","title":{"rendered":"Hi\u1ec7u \u0111i\u1ec7n th\u1ebf c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n t\u1ea1o ra l\u00e0 bao nhi\u00eau?"},"content":{"rendered":"<p>\u0110i\u1ec7n \u00e1p t\u1ea1o ra b\u1edfi c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n l\u00e0 m\u1ed9t ch\u1ee7 \u0111\u1ec1 ph\u1ee9c t\u1ea1p v\u00e0 kh\u00f4ng c\u00f3 m\u1ed9t con s\u1ed1 c\u1ed1 \u0111\u1ecbnh.  \u0110i\u1ec7n \u00e1p n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec1u y\u1ebfu t\u1ed1, t\u1eeb \u0111\u1eb7c t\u00ednh v\u1eadt li\u1ec7u, k\u00edch th\u01b0\u1edbc v\u00e0 h\u00ecnh d\u1ea1ng c\u1ee7a c\u1ea3m bi\u1ebfn, cho \u0111\u1ebfn l\u1ef1c t\u00e1c \u0111\u1ed9ng v\u00e0 c\u00e1ch th\u1ee9c \u0111o l\u01b0\u1eddng. Vi\u1ec7c hi\u1ec3u r\u00f5 nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0y s\u1ebd gi\u00fap ch\u00fang ta d\u1ef1 \u0111o\u00e1n v\u00e0 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t c\u1ee7a c\u1ea3m bi\u1ebfn trong c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3.<\/p>\n<h3>V\u1eadt li\u1ec7u v\u00e0 c\u1ea5u tr\u00fac c\u1ea3m bi\u1ebfn<\/h3>\n<p>V\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n kh\u00e1c nhau s\u1ebd t\u1ea1o ra \u0111i\u1ec7n \u00e1p kh\u00e1c nhau d\u01b0\u1edbi c\u00f9ng m\u1ed9t l\u1ef1c t\u00e1c \u0111\u1ed9ng. V\u00ed d\u1ee5, th\u1ea1ch anh (quartz) th\u01b0\u1eddng t\u1ea1o ra \u0111i\u1ec7n \u00e1p th\u1ea5p h\u01a1n so v\u1edbi g\u1ed1m \u00e1p \u0111i\u1ec7n (PZT).  C\u1ea5u tr\u00fac c\u1ee7a c\u1ea3m bi\u1ebfn, bao g\u1ed3m c\u1ea3 k\u00edch th\u01b0\u1edbc v\u00e0 h\u00ecnh d\u1ea1ng, c\u0169ng \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra. C\u1ea3m bi\u1ebfn m\u1ecfng h\u01a1n v\u00e0 d\u00e0i h\u01a1n th\u01b0\u1eddng t\u1ea1o ra \u0111i\u1ec7n \u00e1p cao h\u01a1n.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>V\u1eadt li\u1ec7u<\/th>\n<th>\u0110i\u1ec7n \u00e1p \u0111i\u1ec3n h\u00ecnh (mV\/N)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Th\u1ea1ch anh<\/td>\n<td>1-10<\/td>\n<\/tr>\n<tr>\n<td>G\u1ed1m PZT<\/td>\n<td>10-1000<\/td>\n<\/tr>\n<tr>\n<td>PVDF<\/td>\n<td>10-200<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>L\u1ef1c t\u00e1c \u0111\u1ed9ng v\u00e0 t\u1ea7n s\u1ed1<\/h3>\n<p>L\u1ef1c t\u00e1c \u0111\u1ed9ng l\u00ean c\u1ea3m bi\u1ebfn t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra. L\u1ef1c c\u00e0ng l\u1edbn, \u0111i\u1ec7n \u00e1p c\u00e0ng cao. T\u01b0\u01a1ng t\u1ef1, t\u1ea7n s\u1ed1 c\u1ee7a l\u1ef1c t\u00e1c \u0111\u1ed9ng c\u0169ng \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng.  \u1ede t\u1ea7n s\u1ed1 c\u1ed9ng h\u01b0\u1edfng c\u1ee7a c\u1ea3m bi\u1ebfn, \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra s\u1ebd \u0111\u1ea1t gi\u00e1 tr\u1ecb c\u1ef1c \u0111\u1ea1i.<\/p>\n<h3>Ph\u01b0\u01a1ng ph\u00e1p \u0111o l\u01b0\u1eddng<\/h3>\n<p>C\u00e1ch th\u1ee9c \u0111o l\u01b0\u1eddng \u0111i\u1ec7n \u00e1p c\u0169ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn k\u1ebft qu\u1ea3.  Tr\u1edf kh\u00e1ng \u0111\u1ea7u v\u00e0o c\u1ee7a thi\u1ebft b\u1ecb \u0111o, c\u0169ng nh\u01b0 c\u00e1c y\u1ebfu t\u1ed1 nhi\u1ec5u b\u00ean ngo\u00e0i, c\u00f3 th\u1ec3 l\u00e0m sai l\u1ec7ch gi\u00e1 tr\u1ecb \u0111o \u0111\u01b0\u1ee3c.  Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c m\u1ea1ch khu\u1ebfch \u0111\u1ea1i t\u00edn hi\u1ec7u ph\u00f9 h\u1ee3p l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 thu \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 ch\u00ednh x\u00e1c.<\/p>\n<h3>\u1ea2nh h\u01b0\u1edfng c\u1ee7a m\u00f4i tr\u01b0\u1eddng<\/h3>\n<p>Nhi\u1ec7t \u0111\u1ed9 v\u00e0 \u0111\u1ed9 \u1ea9m c\u0169ng c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n.  Nhi\u1ec7t \u0111\u1ed9 cao c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra, trong khi \u0111\u1ed9 \u1ea9m cao c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng \u0111o\u1ea3n m\u1ea1ch v\u00e0 h\u01b0 h\u1ecfng c\u1ea3m bi\u1ebfn.<\/p>\n<h3>\u1ee8ng d\u1ee5ng c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n<\/h3>\n<p>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 \u0111o l\u01b0\u1eddng \u00e1p su\u1ea5t v\u00e0 gia t\u1ed1c trong c\u00f4ng nghi\u1ec7p, \u0111\u1ebfn thu th\u1eadp n\u0103ng l\u01b0\u1ee3ng t\u1eeb rung \u0111\u1ed9ng m\u00f4i tr\u01b0\u1eddng.  Hi\u1ec3u r\u00f5 \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra c\u1ee7a c\u1ea3m bi\u1ebfn l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ec3 thi\u1ebft k\u1ebf v\u00e0 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c \u1ee9ng d\u1ee5ng n\u00e0y.<\/p>\n<p>T\u00f3m l\u1ea1i, kh\u00f4ng c\u00f3 m\u1ed9t con s\u1ed1 c\u1ee5 th\u1ec3 cho \u0111i\u1ec7n \u00e1p m\u00e0 m\u1ed9t c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n t\u1ea1o ra.  N\u00f3 ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec1u y\u1ebfu t\u1ed1, bao g\u1ed3m v\u1eadt li\u1ec7u, c\u1ea5u tr\u00fac, l\u1ef1c t\u00e1c \u0111\u1ed9ng, t\u1ea7n s\u1ed1 v\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111o l\u01b0\u1eddng.  Vi\u1ec7c xem x\u00e9t k\u1ef9 l\u01b0\u1ee1ng nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0y l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 l\u1ef1a ch\u1ecdn v\u00e0 s\u1eed d\u1ee5ng c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0110i\u1ec7n \u00e1p t\u1ea1o ra b\u1edfi c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n l\u00e0 m\u1ed9t ch\u1ee7 \u0111\u1ec1 ph\u1ee9c t\u1ea1p v\u00e0 kh\u00f4ng c\u00f3 m\u1ed9t con s\u1ed1 c\u1ed1 \u0111\u1ecbnh. \u0110i\u1ec7n \u00e1p n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec1u y\u1ebfu t\u1ed1, t\u1eeb \u0111\u1eb7c t\u00ednh v\u1eadt li\u1ec7u, k\u00edch th\u01b0\u1edbc v\u00e0 h\u00ecnh d\u1ea1ng c\u1ee7a c\u1ea3m bi\u1ebfn, cho \u0111\u1ebfn l\u1ef1c t\u00e1c \u0111\u1ed9ng v\u00e0 c\u00e1ch th\u1ee9c \u0111o l\u01b0\u1eddng.<\/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-50324","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\/50324","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=50324"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/50324\/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=50324"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=50324"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=50324"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}