{"id":53489,"date":"2022-09-27T13:09:10","date_gmt":"2022-09-27T18:09:10","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-do-ultrasonic-sensors-work\/"},"modified":"2025-01-21T07:11:38","modified_gmt":"2025-01-21T12:11:38","slug":"how-do-ultrasonic-sensors-work","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-do-ultrasonic-sensors-work\/","title":{"rendered":"Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u1ea3m bi\u1ebfn si\u00eau \u00e2m"},"content":{"rendered":"<p>C\u1ea3m bi\u1ebfn si\u00eau \u00e2m l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed s\u1eed d\u1ee5ng s\u00f3ng \u00e2m thanh t\u1ea7n s\u1ed1 cao \u0111\u1ec3 \u0111o kho\u1ea3ng c\u00e1ch \u0111\u1ebfn m\u1ed9t v\u1eadt th\u1ec3. Ch\u00fang ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd \u0111\u1ecbnh v\u1ecb b\u1eb1ng ti\u1ebfng vang, t\u01b0\u01a1ng t\u1ef1 nh\u01b0 c\u00e1ch d\u01a1i s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u1ecbnh h\u01b0\u1edbng trong b\u00f3ng t\u1ed1i.  S\u1ef1 ph\u1ed5 bi\u1ebfn c\u1ee7a c\u1ea3m bi\u1ebfn si\u00eau \u00e2m \u0111\u1ebfn t\u1eeb t\u00ednh linh ho\u1ea1t, gi\u00e1 th\u00e0nh ph\u1ea3i ch\u0103ng v\u00e0 kh\u1ea3 n\u0103ng ho\u1ea1t \u0111\u1ed9ng trong nhi\u1ec1u m\u00f4i tr\u01b0\u1eddng kh\u00e1c nhau, khi\u1ebfn ch\u00fang tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng cho nhi\u1ec1u \u1ee9ng d\u1ee5ng t\u1eeb robot d\u1ecdn d\u1eb9p \u0111\u1ebfn xe \u00f4 t\u00f4 t\u1ef1 l\u00e1i.<\/p>\n<h3>Nguy\u00ean L\u00fd Ho\u1ea1t \u0110\u1ed9ng<\/h3>\n<p>C\u1ea3m bi\u1ebfn si\u00eau \u00e2m ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch ph\u00e1t ra m\u1ed9t xung s\u00f3ng \u00e2m thanh ng\u1eafn \u1edf t\u1ea7n s\u1ed1 si\u00eau \u00e2m, t\u1ee9c l\u00e0 t\u1ea7n s\u1ed1 cao h\u01a1n ng\u01b0\u1ee1ng nghe c\u1ee7a con ng\u01b0\u1eddi. S\u00f3ng \u00e2m n\u00e0y lan truy\u1ec1n trong kh\u00f4ng kh\u00ed cho \u0111\u1ebfn khi g\u1eb7p m\u1ed9t v\u1eadt c\u1ea3n. Khi \u0111\u00f3, m\u1ed9t ph\u1ea7n n\u0103ng l\u01b0\u1ee3ng c\u1ee7a s\u00f3ng \u00e2m s\u1ebd b\u1ecb ph\u1ea3n x\u1ea1 tr\u1edf l\u1ea1i c\u1ea3m bi\u1ebfn d\u01b0\u1edbi d\u1ea1ng ti\u1ebfng vang. C\u1ea3m bi\u1ebfn s\u1ebd \u0111o th\u1eddi gian t\u1eeb khi ph\u00e1t xung \u0111\u1ebfn khi nh\u1eadn \u0111\u01b0\u1ee3c ti\u1ebfng vang.<\/p>\n<h3>\u0110o Kho\u1ea3ng C\u00e1ch<\/h3>\n<p>Bi\u1ebft \u0111\u01b0\u1ee3c t\u1ed1c \u0111\u1ed9 \u00e2m thanh trong kh\u00f4ng kh\u00ed v\u00e0 th\u1eddi gian s\u00f3ng \u00e2m di chuy\u1ec3n, kho\u1ea3ng c\u00e1ch \u0111\u1ebfn v\u1eadt th\u1ec3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n b\u1eb1ng c\u00f4ng th\u1ee9c \u0111\u01a1n gi\u1ea3n:<\/p>\n<p>Kho\u1ea3ng c\u00e1ch = (T\u1ed1c \u0111\u1ed9 \u00e2m thanh x Th\u1eddi gian) \/ 2<\/p>\n<p>Chia cho 2 l\u00e0 do s\u00f3ng \u00e2m \u0111\u00e3 di chuy\u1ec3n c\u1ea3 qu\u00e3ng \u0111\u01b0\u1eddng \u0111i v\u00e0 v\u1ec1.<\/p>\n<h3>C\u1ea5u T\u1ea1o C\u1ea3m Bi\u1ebfn Si\u00eau \u00c2m<\/h3>\n<p>M\u1ed9t c\u1ea3m bi\u1ebfn si\u00eau \u00e2m th\u01b0\u1eddng g\u1ed3m hai th\u00e0nh ph\u1ea7n ch\u00ednh: b\u1ed9 ph\u00e1t v\u00e0 b\u1ed9 thu. B\u1ed9 ph\u00e1t c\u00f3 nhi\u1ec7m v\u1ee5 t\u1ea1o ra s\u00f3ng si\u00eau \u00e2m, trong khi b\u1ed9 thu c\u00f3 nhi\u1ec7m v\u1ee5 ph\u00e1t hi\u1ec7n ti\u1ebfng vang ph\u1ea3n x\u1ea1.  M\u1ed9t s\u1ed1 c\u1ea3m bi\u1ebfn c\u00f2n t\u00edch h\u1ee3p th\u00eam m\u1ea1ch x\u1eed l\u00fd t\u00edn hi\u1ec7u \u0111\u1ec3 l\u1ecdc nhi\u1ec5u v\u00e0 t\u00ednh to\u00e1n kho\u1ea3ng c\u00e1ch.<\/p>\n<h3>C\u00e1c Y\u1ebfu T\u1ed1 \u1ea2nh H\u01b0\u1edfng \u0110\u1ebfn \u0110\u1ed9 Ch\u00ednh X\u00e1c<\/h3>\n<p>\u0110\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a c\u1ea3m bi\u1ebfn si\u00eau \u00e2m c\u00f3 th\u1ec3 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1, bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>Nhi\u1ec7t \u0111\u1ed9:<\/strong> T\u1ed1c \u0111\u1ed9 \u00e2m thanh thay \u0111\u1ed5i theo nhi\u1ec7t \u0111\u1ed9.<\/li>\n<li><strong>\u0110\u1ed9 \u1ea9m:<\/strong> \u0110\u1ed9 \u1ea9m c\u0169ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 \u00e2m thanh, m\u1eb7c d\u00f9 \u00edt h\u01a1n so v\u1edbi nhi\u1ec7t \u0111\u1ed9.<\/li>\n<li><strong>G\u00f3c c\u1ee7a v\u1eadt th\u1ec3:<\/strong>  B\u1ec1 m\u1eb7t ph\u1ea3n x\u1ea1 vu\u00f4ng g\u00f3c v\u1edbi c\u1ea3m bi\u1ebfn s\u1ebd cho k\u1ebft qu\u1ea3 t\u1ed1t nh\u1ea5t.<\/li>\n<li><strong>Ch\u1ea5t li\u1ec7u c\u1ee7a v\u1eadt th\u1ec3:<\/strong> V\u1eadt li\u1ec7u m\u1ec1m, x\u1ed1p h\u1ea5p th\u1ee5 \u00e2m thanh t\u1ed1t h\u01a1n v\u1eadt li\u1ec7u c\u1ee9ng, d\u1eabn \u0111\u1ebfn t\u00edn hi\u1ec7u ph\u1ea3n x\u1ea1 y\u1ebfu h\u01a1n.<\/li>\n<\/ul>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Y\u1ebfu t\u1ed1<\/th>\n<th>\u1ea2nh h\u01b0\u1edfng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Nhi\u1ec7t \u0111\u1ed9<\/td>\n<td>T\u1ed1c \u0111\u1ed9 \u00e2m thanh t\u0103ng theo nhi\u1ec7t \u0111\u1ed9<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ed9 \u1ea9m<\/td>\n<td>\u1ea2nh h\u01b0\u1edfng nh\u1ecf \u0111\u1ebfn t\u1ed1c \u0111\u1ed9 \u00e2m thanh<\/td>\n<\/tr>\n<tr>\n<td>G\u00f3c c\u1ee7a v\u1eadt th\u1ec3<\/td>\n<td>G\u00f3c vu\u00f4ng g\u00f3c cho k\u1ebft qu\u1ea3 t\u1ed1t nh\u1ea5t<\/td>\n<\/tr>\n<tr>\n<td>Ch\u1ea5t li\u1ec7u v\u1eadt th\u1ec3<\/td>\n<td>V\u1eadt li\u1ec7u c\u1ee9ng ph\u1ea3n x\u1ea1 t\u1ed1t h\u01a1n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u1ee8ng D\u1ee5ng C\u1ee7a C\u1ea3m Bi\u1ebfn Si\u00eau \u00c2m<\/h3>\n<p>C\u1ea3m bi\u1ebfn si\u00eau \u00e2m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c, bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>Robot:<\/strong>  \u0110\u1ecbnh v\u1ecb, tr\u00e1nh v\u1eadt c\u1ea3n, \u0111o kho\u1ea3ng c\u00e1ch.<\/li>\n<li><strong>\u00d4 t\u00f4:<\/strong> H\u1ec7 th\u1ed1ng h\u1ed7 tr\u1ee3 \u0111\u1ed7 xe, ph\u00e1t hi\u1ec7n \u0111i\u1ec3m m\u00f9.<\/li>\n<li><strong>Y t\u1ebf:<\/strong>  Ch\u1ea9n \u0111o\u00e1n h\u00ecnh \u1ea3nh si\u00eau \u00e2m.<\/li>\n<li><strong>C\u00f4ng nghi\u1ec7p:<\/strong>  \u0110o m\u1ee9c ch\u1ea5t l\u1ecfng, ki\u1ec3m tra khuy\u1ebft t\u1eadt v\u1eadt li\u1ec7u.<\/li>\n<\/ul>\n<p>T\u00f3m l\u1ea1i, c\u1ea3m bi\u1ebfn si\u00eau \u00e2m l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 \u0111o kho\u1ea3ng c\u00e1ch hi\u1ec7u qu\u1ea3 v\u00e0 linh ho\u1ea1t. Hi\u1ec3u r\u00f5 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 ch\u00ednh x\u00e1c s\u1ebd gi\u00fap ng\u01b0\u1eddi d\u00f9ng l\u1ef1a ch\u1ecdn v\u00e0 s\u1eed d\u1ee5ng c\u1ea3m bi\u1ebfn si\u00eau \u00e2m m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 nh\u1ea5t cho \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 c\u1ee7a m\u00ecnh.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C\u1ea3m bi\u1ebfn si\u00eau \u00e2m l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed s\u1eed d\u1ee5ng s\u00f3ng \u00e2m thanh t\u1ea7n s\u1ed1 cao \u0111\u1ec3 \u0111o kho\u1ea3ng c\u00e1ch \u0111\u1ebfn m\u1ed9t v\u1eadt th\u1ec3. Ch\u00fang ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd \u0111\u1ecbnh v\u1ecb b\u1eb1ng ti\u1ebfng vang, t\u01b0\u01a1ng t\u1ef1 nh\u01b0 c\u00e1ch d\u01a1i s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u1ecbnh h\u01b0\u1edbng trong b\u00f3ng t\u1ed1i. S\u1ef1 ph\u1ed5 bi\u1ebfn c\u1ee7a<\/p>\n","protected":false},"author":1,"featured_media":18705,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6406],"tags":[],"class_list":["post-53489","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\/53489","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=53489"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/53489\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media\/18705"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/media?parent=53489"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=53489"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=53489"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}