{"id":50612,"date":"2023-04-21T14:40:20","date_gmt":"2023-04-21T19:40:20","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-does-piezoelectric-sensor-work\/"},"modified":"2025-01-21T07:12:38","modified_gmt":"2025-01-21T12:12:38","slug":"how-does-piezoelectric-sensor-work","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-does-piezoelectric-sensor-work\/","title":{"rendered":"Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n"},"content":{"rendered":"

C\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n l\u00e0 m\u1ed9t lo\u1ea1i c\u1ea3m bi\u1ebfn t\u1ef1 ph\u00e1t \u0111i\u1ec7n, c\u00f3 kh\u1ea3 n\u0103ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc (nh\u01b0 \u00e1p su\u1ea5t, rung \u0111\u1ed9ng, gia t\u1ed1c) th\u00e0nh n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3 d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt l\u00fd th\u00fa v\u1ecb \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n t\u1eeb cu\u1ed1i th\u1ebf k\u1ef7 19. Hi\u1ec7u \u1ee9ng n\u00e0y cho ph\u00e9p m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u nh\u1ea5t \u0111\u1ecbnh t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi b\u1ecb bi\u1ebfn d\u1ea1ng c\u01a1 h\u1ecdc v\u00e0 ng\u01b0\u1ee3c l\u1ea1i, bi\u1ebfn d\u1ea1ng khi c\u00f3 \u0111i\u1ec7n \u00e1p t\u00e1c \u0111\u1ed9ng. S\u1ef1 linh ho\u1ea1t n\u00e0y khi\u1ebfn c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n tr\u1edf th\u00e0nh m\u1ed9t l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn trong nhi\u1ec1u \u1ee9ng d\u1ee5ng, t\u1eeb c\u00e1c thi\u1ebft b\u1ecb \u0111o l\u01b0\u1eddng ch\u00ednh x\u00e1c \u0111\u1ebfn c\u00e1c h\u1ec7 th\u1ed1ng thu n\u0103ng l\u01b0\u1ee3ng.<\/p>\n

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n v\u00e0 v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n<\/h3>\n

Hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n x\u1ea3y ra do s\u1ef1 thay \u0111\u1ed5i ph\u00e2n b\u1ed1 \u0111i\u1ec7n t\u00edch b\u00ean trong v\u1eadt li\u1ec7u khi ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a l\u1ef1c b\u00ean ngo\u00e0i. V\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n th\u01b0\u1eddng l\u00e0 c\u00e1c tinh th\u1ec3, g\u1ed1m ho\u1eb7c polymer \u0111\u1eb7c bi\u1ec7t. Khi v\u1eadt li\u1ec7u n\u00e0y b\u1ecb n\u00e9n ho\u1eb7c k\u00e9o gi\u00e3n, c\u1ea5u tr\u00fac tinh th\u1ec3 b\u00ean trong b\u1ecb bi\u1ebfn d\u1ea1ng, d\u1eabn \u0111\u1ebfn s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng \u0111i\u1ec7n t\u00edch v\u00e0 t\u1ea1o ra \u0111i\u1ec7n \u00e1p tr\u00ean b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u. Ng\u01b0\u1ee3c l\u1ea1i, khi \u0111\u1eb7t m\u1ed9t \u0111i\u1ec7n \u00e1p v\u00e0o v\u1eadt li\u1ec7u, n\u00f3 s\u1ebd l\u00e0m thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc c\u1ee7a v\u1eadt li\u1ec7u.<\/p>\n\n\n\n\n\n\n\n
Lo\u1ea1i v\u1eadt li\u1ec7u<\/th>\n\u01afu \u0111i\u1ec3m<\/th>\nNh\u01b0\u1ee3c \u0111i\u1ec3m<\/th>\nV\u00ed d\u1ee5<\/th>\n<\/tr>\n<\/thead>\n
Tinh th\u1ec3 (Quartz)<\/td>\n\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh cao, \u0111\u1ed9 ch\u00ednh x\u00e1c t\u1ed1t<\/td>\nGi\u00e1 th\u00e0nh cao, t\u00edn hi\u1ec7u ra nh\u1ecf<\/td>\n\u0110\u1ed3ng h\u1ed3 th\u1ea1ch anh<\/td>\n<\/tr>\n
G\u1ed1m (PZT)<\/td>\n\u0110\u1ed9 nh\u1ea1y cao, gi\u00e1 th\u00e0nh th\u1ea5p<\/td>\nD\u1ec5 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec7t \u0111\u1ed9<\/td>\n\u0110\u1ea7u \u0111\u00e1nh l\u1eeda, c\u1ea3m bi\u1ebfn si\u00eau \u00e2m<\/td>\n<\/tr>\n
Polymer (PVDF)<\/td>\nLinh ho\u1ea1t, d\u1ea3i t\u1ea7n s\u1ed1 r\u1ed9ng<\/td>\n\u0110\u1ed9 nh\u1ea1y th\u1ea5p h\u01a1n g\u1ed1m<\/td>\nC\u1ea3m bi\u1ebfn \u00e1p l\u1ef1c, microphone<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u1ea5u t\u1ea1o c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n<\/h3>\n

C\u1ea5u t\u1ea1o c\u01a1 b\u1ea3n c\u1ee7a m\u1ed9t c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n bao g\u1ed3m m\u1ed9t ho\u1eb7c nhi\u1ec1u mi\u1ebfng v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c k\u1eb9p gi\u1eefa hai \u0111i\u1ec7n c\u1ef1c. Khi c\u00f3 l\u1ef1c t\u00e1c \u0111\u1ed9ng, v\u1eadt li\u1ec7u \u00e1p \u0111i\u1ec7n b\u1ecb bi\u1ebfn d\u1ea1ng, t\u1ea1o ra \u0111i\u1ec7n \u00e1p gi\u1eefa hai \u0111i\u1ec7n c\u1ef1c. \u0110i\u1ec7n \u00e1p n\u00e0y t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi l\u1ef1c t\u00e1c \u0111\u1ed9ng v\u00e0 \u0111\u01b0\u1ee3c khu\u1ebfch \u0111\u1ea1i v\u00e0 x\u1eed l\u00fd \u0111\u1ec3 \u0111o l\u01b0\u1eddng ho\u1eb7c \u0111i\u1ec1u khi\u1ec3n. K\u00edch th\u01b0\u1edbc v\u00e0 h\u00ecnh d\u1ea1ng c\u1ee7a c\u1ea3m bi\u1ebfn \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf t\u00f9y thu\u1ed9c v\u00e0o \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3.<\/p>\n

\u1ee8ng d\u1ee5ng c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n<\/h3>\n

C\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau nh\u1edd t\u00ednh linh ho\u1ea1t v\u00e0 \u0111\u1ed9 nh\u1ea1y cao. M\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n

    \n
  • \u0110o l\u01b0\u1eddng \u00e1p su\u1ea5t:<\/strong> Trong c\u00e1c h\u1ec7 th\u1ed1ng th\u1ee7y l\u1ef1c, kh\u00ed n\u00e9n, v\u00e0 y t\u1ebf.<\/li>\n
  • \u0110o l\u01b0\u1eddng rung \u0111\u1ed9ng:<\/strong> Trong c\u00e1c m\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p, \u0111\u1ed9ng c\u01a1, v\u00e0 c\u1ea7u \u0111\u01b0\u1eddng.<\/li>\n
  • C\u1ea3m bi\u1ebfn gia t\u1ed1c:<\/strong> Trong c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed, \u00f4 t\u00f4, v\u00e0 h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5.<\/li>\n
  • \u0110\u1ea7u \u0111\u00e1nh l\u1eeda:<\/strong> Trong b\u1eadt l\u1eeda ga v\u00e0 m\u1ed9t s\u1ed1 lo\u1ea1i \u0111\u1ed9ng c\u01a1.<\/li>\n
  • Thi\u1ebft b\u1ecb si\u00eau \u00e2m:<\/strong> Trong c\u00e1c \u1ee9ng d\u1ee5ng y t\u1ebf, c\u00f4ng nghi\u1ec7p (v\u00ed d\u1ee5, m\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb si\u00eau \u00e2m s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 \u00e1p \u0111i\u1ec7n).<\/li>\n
  • Thu n\u0103ng l\u01b0\u1ee3ng:<\/strong> Chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc t\u1eeb m\u00f4i tr\u01b0\u1eddng th\u00e0nh n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n.<\/li>\n<\/ul>\n

    T\u00f3m l\u1ea1i, c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, cho ph\u00e9p 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. S\u1ef1 \u0111a d\u1ea1ng v\u1ec1 v\u1eadt li\u1ec7u, c\u1ea5u t\u1ea1o \u0111\u01a1n gi\u1ea3n v\u00e0 \u0111\u1ed9 nh\u1ea1y cao \u0111\u00e3 gi\u00fap c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 quan tr\u1ecdng trong nhi\u1ec1u l\u0129nh v\u1ef1c, \u0111\u00f3ng g\u00f3p v\u00e0o s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng ngh\u1ec7 hi\u1ec7n \u0111\u1ea1i. T\u1eeb vi\u1ec7c \u0111o l\u01b0\u1eddng ch\u00ednh x\u00e1c \u0111\u1ebfn thu n\u0103ng l\u01b0\u1ee3ng, c\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n ti\u1ebfp t\u1ee5c \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u v\u00e0 c\u1ea3i ti\u1ebfn \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u ng\u00e0y c\u00e0ng cao c\u1ee7a x\u00e3 h\u1ed9i.<\/p>\n","protected":false},"excerpt":{"rendered":"

    C\u1ea3m bi\u1ebfn \u00e1p \u0111i\u1ec7n l\u00e0 m\u1ed9t lo\u1ea1i c\u1ea3m bi\u1ebfn t\u1ef1 ph\u00e1t \u0111i\u1ec7n, c\u00f3 kh\u1ea3 n\u0103ng chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc (nh\u01b0 \u00e1p su\u1ea5t, rung \u0111\u1ed9ng, gia t\u1ed1c) th\u00e0nh n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3 d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng \u00e1p \u0111i\u1ec7n, m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt l\u00fd th\u00fa v\u1ecb \u0111\u01b0\u1ee3c<\/p>\n","protected":false},"author":1,"featured_media":26463,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-50612","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\/50612","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=50612"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/50612\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/26463"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=50612"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=50612"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=50612"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}