{"id":49556,"date":"2023-04-21T22:08:46","date_gmt":"2023-04-22T03:08:46","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-drive-a-piezoelectric-transducer\/"},"modified":"2025-01-21T07:15:37","modified_gmt":"2025-01-21T12:15:37","slug":"how-to-drive-a-piezoelectric-transducer","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-to-drive-a-piezoelectric-transducer\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn v\u1eadn h\u00e0nh b\u1ed9 chuy\u1ec3n \u0111\u1ed5i \u00e1p \u0111i\u1ec7n"},"content":{"rendered":"<p>Vi\u1ec7c \u0111i\u1ec1u khi\u1ec3n \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n (piezoelectric transducer) \u0111\u00f2i h\u1ecfi s\u1ef1 hi\u1ec3u bi\u1ebft v\u1ec1 \u0111\u1eb7c t\u00ednh v\u1eadt l\u00fd v\u00e0 \u0111i\u1ec7n c\u1ee7a ch\u00fang. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd h\u01b0\u1edbng d\u1eabn chi ti\u1ebft c\u00e1ch \u0111i\u1ec1u khi\u1ec3n \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n \u0111\u1ec3 \u0111\u1ea1t hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u v\u00e0 tr\u00e1nh g\u00e2y h\u01b0 h\u1ea1i.<\/p>\n<h3>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n<\/h3>\n<p>\u0110\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, t\u1ee9c l\u00e0 kh\u1ea3 n\u0103ng c\u1ee7a v\u1eadt li\u1ec7u chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc th\u00e0nh n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. Khi \u00e1p d\u1ee5ng m\u1ed9t \u0111i\u1ec7n \u00e1p v\u00e0o \u0111\u1ea7u d\u00f2, n\u00f3 s\u1ebd bi\u1ebfn d\u1ea1ng v\u00e0 t\u1ea1o ra s\u00f3ng \u00e2m. Ng\u01b0\u1ee3c l\u1ea1i, khi \u0111\u1ea7u d\u00f2 ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a s\u00f3ng \u00e2m, n\u00f3 s\u1ebd t\u1ea1o ra m\u1ed9t \u0111i\u1ec7n \u00e1p.<\/p>\n<h3>C\u00e1c lo\u1ea1i t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n<\/h3>\n<p>C\u00f3 nhi\u1ec1u lo\u1ea1i t\u00edn hi\u1ec7u \u0111i\u1ec7n \u00e1p c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n, bao g\u1ed3m t\u00edn hi\u1ec7u DC, AC, xung vu\u00f4ng, v\u00e0 t\u00edn hi\u1ec7u s\u00f3ng sin. T\u00f9y thu\u1ed9c v\u00e0o \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3, vi\u1ec7c l\u1ef1a ch\u1ecdn lo\u1ea1i t\u00edn hi\u1ec7u ph\u00f9 h\u1ee3p l\u00e0 r\u1ea5t quan tr\u1ecdng.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Lo\u1ea1i t\u00edn hi\u1ec7u<\/th>\n<th>\u01afu \u0111i\u1ec3m<\/th>\n<th>Nh\u01b0\u1ee3c \u0111i\u1ec3m<\/th>\n<th>\u1ee8ng d\u1ee5ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>DC<\/td>\n<td>\u0110\u01a1n gi\u1ea3n<\/td>\n<td>G\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng ph\u00e2n c\u1ef1c<\/td>\n<td>\u0110i\u1ec1u khi\u1ec3n t\u0129nh<\/td>\n<\/tr>\n<tr>\n<td>AC<\/td>\n<td>Hi\u1ec7u su\u1ea5t cao<\/td>\n<td>Kh\u00f3 \u0111i\u1ec1u khi\u1ec3n t\u1ea7n s\u1ed1<\/td>\n<td>T\u1ea1o s\u00f3ng si\u00eau \u00e2m<\/td>\n<\/tr>\n<tr>\n<td>Xung vu\u00f4ng<\/td>\n<td>D\u1ec5 \u0111i\u1ec1u khi\u1ec3n<\/td>\n<td>C\u00f3 th\u1ec3 g\u00e2y nhi\u1ec5u<\/td>\n<td>\u0110o kho\u1ea3ng c\u00e1ch<\/td>\n<\/tr>\n<tr>\n<td>S\u00f3ng sin<\/td>\n<td>\u00cdt nhi\u1ec5u<\/td>\n<td>C\u00f4ng su\u1ea5t th\u1ea5p h\u01a1n xung vu\u00f4ng<\/td>\n<td>\u1ee8ng d\u1ee5ng y t\u1ebf<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Ch\u1ecdn l\u1ef1a m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n<\/h3>\n<p>M\u1ea1ch \u0111i\u1ec1u khi\u1ec3n \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c cung c\u1ea5p t\u00edn hi\u1ec7u \u0111i\u1ec7n \u00e1p ch\u00ednh x\u00e1c v\u00e0 \u1ed5n \u0111\u1ecbnh cho \u0111\u1ea7u d\u00f2. C\u00f3 nhi\u1ec1u lo\u1ea1i m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n kh\u00e1c nhau, t\u1eeb m\u1ea1ch \u0111\u01a1n gi\u1ea3n s\u1eed d\u1ee5ng transistor \u0111\u1ebfn m\u1ea1ch ph\u1ee9c t\u1ea1p s\u1eed d\u1ee5ng vi \u0111i\u1ec1u khi\u1ec3n. Vi\u1ec7c l\u1ef1a ch\u1ecdn m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n ph\u1ee5 thu\u1ed9c v\u00e0o y\u00eau c\u1ea7u v\u1ec1 c\u00f4ng su\u1ea5t, t\u1ea7n s\u1ed1 v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/p>\n<h3>C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t<\/h3>\n<p>Hi\u1ec7u su\u1ea5t c\u1ee7a \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec1u y\u1ebfu t\u1ed1, bao g\u1ed3m t\u1ea7n s\u1ed1 c\u1ed9ng h\u01b0\u1edfng, nhi\u1ec7t \u0111\u1ed9, v\u00e0 t\u1ea3i c\u01a1 h\u1ecdc.  C\u1ea7n ph\u1ea3i hi\u1ec7u ch\u1ec9nh c\u00e1c th\u00f4ng s\u1ed1 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ec3 b\u00f9 tr\u1eeb cho nh\u1eefng \u1ea3nh h\u01b0\u1edfng n\u00e0y. V\u00ed d\u1ee5, t\u1ea7n s\u1ed1 c\u1ed9ng h\u01b0\u1edfng c\u1ee7a \u0111\u1ea7u d\u00f2 c\u00f3 th\u1ec3 thay \u0111\u1ed5i theo nhi\u1ec7t \u0111\u1ed9.<\/p>\n<h3>\u1ee8ng d\u1ee5ng c\u1ee7a \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n trong s\u00f3ng si\u00eau \u00e2m<\/h3>\n<p>\u0110\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c \u1ee9ng d\u1ee5ng s\u00f3ng si\u00eau \u00e2m, t\u1eeb ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y \u0111\u1ebfn h\u00ecnh \u1ea3nh y t\u1ebf. Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, c\u00e1c thi\u1ebft b\u1ecb si\u00eau \u00e2m c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 t\u1eeb c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t nh\u01b0 Beijing Ultrasonic. Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u1ea7u d\u00f2 ph\u00f9 h\u1ee3p v\u1edbi \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/p>\n<h3>B\u1ea3o v\u1ec7 \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n<\/h3>\n<p>\u0110\u1ec3 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a \u0111\u1ea7u d\u00f2, c\u1ea7n ph\u1ea3i tr\u00e1nh c\u00e1c \u0111i\u1ec1u ki\u1ec7n ho\u1ea1t \u0111\u1ed9ng kh\u1eafc nghi\u1ec7t nh\u01b0 nhi\u1ec7t \u0111\u1ed9 cao, \u0111\u1ed9 \u1ea9m cao, v\u00e0 va \u0111\u1eadp m\u1ea1nh.  Ngo\u00e0i ra, c\u1ea7n ph\u1ea3i \u0111\u1ea3m b\u1ea3o r\u1eb1ng \u0111i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n cho ph\u00e9p.<\/p>\n<p>Vi\u1ec7c \u0111i\u1ec1u khi\u1ec3n \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n \u0111\u00f2i h\u1ecfi s\u1ef1 ch\u00fa \u00fd \u0111\u1ebfn nhi\u1ec1u y\u1ebfu t\u1ed1 k\u1ef9 thu\u1eadt. B\u1eb1ng c\u00e1ch hi\u1ec3u r\u00f5 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng, l\u1ef1a ch\u1ecdn m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n ph\u00f9 h\u1ee3p v\u00e0 \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7, ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 khai th\u00e1c t\u1ed1i \u0111a hi\u1ec7u su\u1ea5t c\u1ee7a \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n trong c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Vi\u1ec7c \u0111i\u1ec1u khi\u1ec3n \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n (piezoelectric transducer) \u0111\u00f2i h\u1ecfi s\u1ef1 hi\u1ec3u bi\u1ebft v\u1ec1 \u0111\u1eb7c t\u00ednh v\u1eadt l\u00fd v\u00e0 \u0111i\u1ec7n c\u1ee7a ch\u00fang. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd h\u01b0\u1edbng d\u1eabn chi ti\u1ebft c\u00e1ch \u0111i\u1ec1u khi\u1ec3n \u0111\u1ea7u d\u00f2 \u00e1p \u0111i\u1ec7n \u0111\u1ec3 \u0111\u1ea1t hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u v\u00e0 tr\u00e1nh g\u00e2y h\u01b0 h\u1ea1i. Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0111\u1ea7u<\/p>\n","protected":false},"author":1,"featured_media":24651,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-49556","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\/49556","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=49556"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/49556\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/24651"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=49556"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=49556"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=49556"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}