{"id":53127,"date":"2022-10-15T00:33:24","date_gmt":"2022-10-15T05:33:24","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/the-frequency-limit-of-a-piezoceramic-sheet-and-some-properties\/"},"modified":"2025-01-21T07:25:57","modified_gmt":"2025-01-21T12:25:57","slug":"the-frequency-limit-of-a-piezoceramic-sheet-and-some-properties","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/the-frequency-limit-of-a-piezoceramic-sheet-and-some-properties\/","title":{"rendered":"Gi\u1edbi h\u1ea1n t\u1ea7n s\u1ed1 v\u00e0 \u0111\u1eb7c t\u00ednh c\u1ee7a v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n g\u1ed1m"},"content":{"rendered":"<p>V\u1eadt li\u1ec7u g\u1ed1m \u00e1p \u0111i\u1ec7n (piezoceramic) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u \u1ee9ng d\u1ee5ng, t\u1eeb c\u1ea3m bi\u1ebfn v\u00e0 b\u1ed9 truy\u1ec1n \u0111\u1ed9ng \u0111\u1ebfn c\u00e1c thi\u1ebft b\u1ecb t\u1ea1o s\u00f3ng si\u00eau \u00e2m. T\u1ea7n s\u1ed1 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ed9t t\u1ea5m g\u1ed1m \u00e1p \u0111i\u1ec7n l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng c\u1ea7n xem x\u00e9t khi thi\u1ebft k\u1ebf v\u00e0 \u1ee9ng d\u1ee5ng. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o gi\u1edbi h\u1ea1n t\u1ea7n s\u1ed1 c\u1ee7a t\u1ea5m g\u1ed1m \u00e1p \u0111i\u1ec7n v\u00e0 m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t quan tr\u1ecdng li\u00ean quan.<\/p>\n<h3>T\u1ea7n s\u1ed1 c\u1ed9ng h\u01b0\u1edfng v\u00e0 t\u1ea7n s\u1ed1 ch\u1ed1ng c\u1ed9ng h\u01b0\u1edfng<\/h3>\n<p>T\u1ea7n s\u1ed1 c\u1ed9ng h\u01b0\u1edfng v\u00e0 t\u1ea7n s\u1ed1 ch\u1ed1ng c\u1ed9ng h\u01b0\u1edfng l\u00e0 hai th\u00f4ng s\u1ed1 quan tr\u1ecdng nh\u1ea5t khi n\u00f3i v\u1ec1 gi\u1edbi h\u1ea1n t\u1ea7n s\u1ed1 c\u1ee7a m\u1ed9t t\u1ea5m g\u1ed1m \u00e1p \u0111i\u1ec7n. T\u1ea7n s\u1ed1 c\u1ed9ng h\u01b0\u1edfng l\u00e0 t\u1ea7n s\u1ed1 m\u00e0 t\u1ea1i \u0111\u00f3 tr\u1edf kh\u00e1ng c\u1ee7a t\u1ea5m g\u1ed1m \u0111\u1ea1t gi\u00e1 tr\u1ecb nh\u1ecf nh\u1ea5t, trong khi t\u1ea7n s\u1ed1 ch\u1ed1ng c\u1ed9ng h\u01b0\u1edfng l\u00e0 t\u1ea7n s\u1ed1 m\u00e0 t\u1ea1i \u0111\u00f3 tr\u1edf kh\u00e1ng \u0111\u1ea1t gi\u00e1 tr\u1ecb l\u1edbn nh\u1ea5t.  Hai t\u1ea7n s\u1ed1 n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o k\u00edch th\u01b0\u1edbc, h\u00ecnh d\u1ea1ng v\u00e0 v\u1eadt li\u1ec7u c\u1ee7a t\u1ea5m g\u1ed1m.<\/p>\n<h3>\u1ea2nh h\u01b0\u1edfng c\u1ee7a k\u00edch th\u01b0\u1edbc v\u00e0 h\u00ecnh d\u1ea1ng<\/h3>\n<p>K\u00edch th\u01b0\u1edbc v\u00e0 h\u00ecnh d\u1ea1ng c\u1ee7a t\u1ea5m g\u1ed1m \u00e1p \u0111i\u1ec7n \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn t\u1ea7n s\u1ed1 c\u1ed9ng h\u01b0\u1edfng v\u00e0 t\u1ea7n s\u1ed1 ch\u1ed1ng c\u1ed9ng h\u01b0\u1edfng. N\u00f3i chung, t\u1ea5m g\u1ed1m c\u00e0ng m\u1ecfng v\u00e0 nh\u1ecf th\u00ec t\u1ea7n s\u1ed1 c\u1ed9ng h\u01b0\u1edfng c\u00e0ng cao.  Ng\u01b0\u1ee3c l\u1ea1i, t\u1ea5m g\u1ed1m c\u00e0ng d\u00e0y v\u00e0 l\u1edbn th\u00ec t\u1ea7n s\u1ed1 c\u1ed9ng h\u01b0\u1edfng c\u00e0ng th\u1ea5p.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>K\u00edch th\u01b0\u1edbc t\u1ea5m g\u1ed1m<\/th>\n<th>T\u1ea7n s\u1ed1 c\u1ed9ng h\u01b0\u1edfng (kHz)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Nh\u1ecf<\/td>\n<td>Cao<\/td>\n<\/tr>\n<tr>\n<td>L\u1edbn<\/td>\n<td>Th\u1ea5p<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t \u1edf t\u1ea7n s\u1ed1 cao<\/h3>\n<p>\u1ede t\u1ea7n s\u1ed1 cao, hi\u1ec7u su\u1ea5t c\u1ee7a t\u1ea5m g\u1ed1m \u00e1p \u0111i\u1ec7n c\u00f3 th\u1ec3 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1, bao g\u1ed3m t\u1ed5n th\u1ea5t \u0111i\u1ec7n m\u00f4i, t\u1ed5n th\u1ea5t c\u01a1 h\u1ecdc v\u00e0 hi\u1ec7u \u1ee9ng nhi\u1ec7t.  Vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p v\u00e0 thi\u1ebft k\u1ebf t\u1ed1i \u01b0u l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 gi\u1ea3m thi\u1ec3u c\u00e1c t\u1ed5n th\u1ea5t n\u00e0y v\u00e0 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t t\u1ed1t \u1edf t\u1ea7n s\u1ed1 cao.<\/p>\n<h3>H\u1eb1ng s\u1ed1 \u00e1p \u0111i\u1ec7n<\/h3>\n<p>C\u00e1c h\u1eb1ng s\u1ed1 \u00e1p \u0111i\u1ec7n m\u00f4 t\u1ea3 kh\u1ea3 n\u0103ng 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 c\u1ee7a v\u1eadt li\u1ec7u g\u1ed1m \u00e1p \u0111i\u1ec7n.  C\u00e1c h\u1eb1ng s\u1ed1 n\u00e0y \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh hi\u1ec7u su\u1ea5t c\u1ee7a t\u1ea5m g\u1ed1m \u1edf c\u00e1c t\u1ea7n s\u1ed1 kh\u00e1c nhau.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>H\u1eb1ng s\u1ed1<\/th>\n<th>\u00dd ngh\u0129a<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>d33<\/td>\n<td>H\u1ec7 s\u1ed1 \u00e1p \u0111i\u1ec7n d\u1ecdc<\/td>\n<\/tr>\n<tr>\n<td>d31<\/td>\n<td>H\u1ec7 s\u1ed1 \u00e1p \u0111i\u1ec7n ngang<\/td>\n<\/tr>\n<tr>\n<td>g33<\/td>\n<td>H\u1ec7 s\u1ed1 \u00e1p \u0111i\u1ec7n \u0111i\u1ec7n \u00e1p<\/td>\n<\/tr>\n<tr>\n<td>g31<\/td>\n<td>H\u1ec7 s\u1ed1 \u00e1p \u0111i\u1ec7n \u0111i\u1ec7n \u00e1p ngang<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u1ee8ng d\u1ee5ng c\u1ee7a g\u1ed1m \u00e1p \u0111i\u1ec7n \u1edf c\u00e1c d\u1ea3i t\u1ea7n s\u1ed1 kh\u00e1c nhau<\/h3>\n<p>T\u00f9y thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1 ho\u1ea1t \u0111\u1ed9ng, g\u1ed1m \u00e1p \u0111i\u1ec7n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng kh\u00e1c nhau.  V\u00ed d\u1ee5, g\u1ed1m \u00e1p \u0111i\u1ec7n t\u1ea7n s\u1ed1 th\u1ea5p th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t v\u00e0 gia t\u1ed1c, trong khi g\u1ed1m \u00e1p \u0111i\u1ec7n t\u1ea7n s\u1ed1 cao \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c thi\u1ebft b\u1ecb si\u00eau \u00e2m, v\u00ed d\u1ee5 nh\u01b0 c\u00e1c thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t b\u1edfi Beijing Ultrasonic, n\u1ebfu c\u1ea7n thi\u1ebft ph\u1ea3i \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u1ed9t th\u01b0\u01a1ng hi\u1ec7u c\u1ee5 th\u1ec3 trong ng\u1eef c\u1ea3nh si\u00eau \u00e2m.<\/p>\n<p>T\u00f3m l\u1ea1i, gi\u1edbi h\u1ea1n t\u1ea7n s\u1ed1 c\u1ee7a m\u1ed9t t\u1ea5m g\u1ed1m \u00e1p \u0111i\u1ec7n ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec1u y\u1ebfu t\u1ed1, bao g\u1ed3m k\u00edch th\u01b0\u1edbc, h\u00ecnh d\u1ea1ng, v\u1eadt li\u1ec7u v\u00e0 c\u00e1c h\u1eb1ng s\u1ed1 \u00e1p \u0111i\u1ec7n.  Hi\u1ec3u r\u00f5 c\u00e1c y\u1ebfu t\u1ed1 n\u00e0y l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 thi\u1ebft k\u1ebf v\u00e0 \u1ee9ng d\u1ee5ng hi\u1ec7u qu\u1ea3 v\u1eadt li\u1ec7u g\u1ed1m \u00e1p \u0111i\u1ec7n trong c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau.  Vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u v\u00e0 thi\u1ebft k\u1ebf t\u1ed1i \u01b0u s\u1ebd gi\u00fap t\u1eadn d\u1ee5ng t\u1ed1i \u0111a hi\u1ec7u su\u1ea5t c\u1ee7a g\u1ed1m \u00e1p \u0111i\u1ec7n v\u00e0 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a t\u1eebng \u1ee9ng d\u1ee5ng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>V\u1eadt li\u1ec7u g\u1ed1m \u00e1p \u0111i\u1ec7n (piezoceramic) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u \u1ee9ng d\u1ee5ng, t\u1eeb c\u1ea3m bi\u1ebfn v\u00e0 b\u1ed9 truy\u1ec1n \u0111\u1ed9ng \u0111\u1ebfn c\u00e1c thi\u1ebft b\u1ecb t\u1ea1o s\u00f3ng si\u00eau \u00e2m. T\u1ea7n s\u1ed1 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ed9t t\u1ea5m g\u1ed1m \u00e1p \u0111i\u1ec7n l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng c\u1ea7n xem x\u00e9t khi thi\u1ebft k\u1ebf v\u00e0 \u1ee9ng d\u1ee5ng.<\/p>\n","protected":false},"author":1,"featured_media":602,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-53127","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\/53127","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=53127"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/53127\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/602"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=53127"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=53127"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=53127"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}