{"id":49788,"date":"2023-04-21T15:40:53","date_gmt":"2023-04-21T20:40:53","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-to-connect-ultrasonic-sensor\/"},"modified":"2025-01-21T07:14:58","modified_gmt":"2025-01-21T12:14:58","slug":"how-to-connect-ultrasonic-sensor","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/vi\/how-to-connect-ultrasonic-sensor\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn k\u1ebft n\u1ed1i c\u1ea3m bi\u1ebfn si\u00eau \u00e2m chi ti\u1ebft"},"content":{"rendered":"

C\u1ea3m bi\u1ebfn si\u00eau \u00e2m l\u00e0 m\u1ed9t lo\u1ea1i c\u1ea3m bi\u1ebfn s\u1eed d\u1ee5ng s\u00f3ng \u00e2m \u0111\u1ec3 \u0111o kho\u1ea3ng c\u00e1ch. Ch\u00fang ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch ph\u00e1t ra m\u1ed9t xung si\u00eau \u00e2m v\u00e0 \u0111o th\u1eddi gian \u0111\u1ec3 xung \u0111\u00f3 ph\u1ea3n x\u1ea1 l\u1ea1i t\u1eeb m\u1ed9t v\u1eadt th\u1ec3. Vi\u1ec7c k\u1ebft n\u1ed1i c\u1ea3m bi\u1ebfn si\u00eau \u00e2m \u0111\u00fang c\u00e1ch l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a h\u1ec7 th\u1ed1ng. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd h\u01b0\u1edbng d\u1eabn chi ti\u1ebft c\u00e1ch k\u1ebft n\u1ed1i c\u1ea3m bi\u1ebfn si\u00eau \u00e2m v\u1edbi c\u00e1c vi \u0111i\u1ec1u khi\u1ec3n ph\u1ed5 bi\u1ebfn.<\/p>\n

Nguy\u00ean L\u00fd Ho\u1ea1t \u0110\u1ed9ng<\/h3>\n

C\u1ea3m bi\u1ebfn si\u00eau \u00e2m th\u01b0\u1eddng c\u00f3 b\u1ed1n ch\u00e2n: VCC, GND, Trigger, v\u00e0 Echo. Ch\u00e2n Trigger d\u00f9ng \u0111\u1ec3 k\u00edch ho\u1ea1t c\u1ea3m bi\u1ebfn ph\u00e1t ra xung si\u00eau \u00e2m. Ch\u00e2n Echo s\u1ebd nh\u1eadn t\u00edn hi\u1ec7u ph\u1ea3n h\u1ed3i t\u1eeb v\u1eadt th\u1ec3. Kho\u1ea3ng th\u1eddi gian gi\u1eefa vi\u1ec7c ph\u00e1t xung v\u00e0 nh\u1eadn t\u00edn hi\u1ec7u ph\u1ea3n h\u1ed3i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00ednh to\u00e1n kho\u1ea3ng c\u00e1ch.<\/p>\n

K\u1ebft N\u1ed1i V\u1edbi Arduino<\/h3>\n

\u0110\u1ec3 k\u1ebft n\u1ed1i c\u1ea3m bi\u1ebfn si\u00eau \u00e2m v\u1edbi Arduino, b\u1ea1n c\u1ea7n th\u1ef1c hi\u1ec7n c\u00e1c b\u01b0\u1edbc sau:<\/p>\n\n\n\n\n\n\n\n\n
Ch\u00e2n C\u1ea3m Bi\u1ebfn<\/th>\nCh\u00e2n Arduino<\/th>\nM\u00f4 T\u1ea3<\/th>\n<\/tr>\n<\/thead>\n
VCC<\/td>\n5V<\/td>\nNgu\u1ed3n \u0111i\u1ec7n d\u01b0\u01a1ng<\/td>\n<\/tr>\n
GND<\/td>\nGND<\/td>\nNgu\u1ed3n \u0111i\u1ec7n \u00e2m<\/td>\n<\/tr>\n
Trigger<\/td>\nCh\u00e2n s\u1ed1 k\u1ef9 thu\u1eadt s\u1ed1 (v\u00ed d\u1ee5: 7)<\/td>\nCh\u00e2n k\u00edch ho\u1ea1t<\/td>\n<\/tr>\n
Echo<\/td>\nCh\u00e2n s\u1ed1 k\u1ef9 thu\u1eadt s\u1ed1 (v\u00ed d\u1ee5: 8)<\/td>\nCh\u00e2n nh\u1eadn t\u00edn hi\u1ec7u<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Sau khi k\u1ebft n\u1ed1i ph\u1ea7n c\u1ee9ng, b\u1ea1n c\u1ea7n t\u1ea3i l\u00ean Arduino IDE m\u1ed9t \u0111o\u1ea1n code \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n c\u1ea3m bi\u1ebfn. Code n\u00e0y s\u1ebd g\u1eedi m\u1ed9t xung HIGH \u0111\u1ebfn ch\u00e2n Trigger, sau \u0111\u00f3 \u0111o th\u1eddi gian ch\u00e2n Echo \u1edf m\u1ee9c HIGH.<\/p>\n

K\u1ebft N\u1ed1i V\u1edbi ESP32\/ESP8266<\/h3>\n

Vi\u1ec7c k\u1ebft n\u1ed1i v\u1edbi ESP32\/ESP8266 c\u0169ng t\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1edbi Arduino.<\/p>\n\n\n\n\n\n\n\n\n
Ch\u00e2n C\u1ea3m Bi\u1ebfn<\/th>\nCh\u00e2n ESP32\/ESP8266<\/th>\nM\u00f4 T\u1ea3<\/th>\n<\/tr>\n<\/thead>\n
VCC<\/td>\n5V ho\u1eb7c 3.3V (t\u00f9y thu\u1ed9c lo\u1ea1i c\u1ea3m bi\u1ebfn)<\/td>\nNgu\u1ed3n \u0111i\u1ec7n d\u01b0\u01a1ng<\/td>\n<\/tr>\n
GND<\/td>\nGND<\/td>\nNgu\u1ed3n \u0111i\u1ec7n \u00e2m<\/td>\n<\/tr>\n
Trigger<\/td>\nCh\u00e2n s\u1ed1 k\u1ef9 thu\u1eadt s\u1ed1 (v\u00ed d\u1ee5: GPIO2)<\/td>\nCh\u00e2n k\u00edch ho\u1ea1t<\/td>\n<\/tr>\n
Echo<\/td>\nCh\u00e2n s\u1ed1 k\u1ef9 thu\u1eadt s\u1ed1 (v\u00ed d\u1ee5: GPIO4)<\/td>\nCh\u00e2n nh\u1eadn t\u00edn hi\u1ec7u<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

L\u01b0u \u00fd ki\u1ec3m tra datasheet c\u1ee7a c\u1ea3m bi\u1ebfn \u0111\u1ec3 bi\u1ebft \u0111i\u1ec7n \u00e1p ho\u1ea1t \u0111\u1ed9ng ph\u00f9 h\u1ee3p (3.3V ho\u1eb7c 5V). T\u01b0\u01a1ng t\u1ef1 nh\u01b0 Arduino, b\u1ea1n c\u1ea7n m\u1ed9t \u0111o\u1ea1n code \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n c\u1ea3m bi\u1ebfn v\u00e0 t\u00ednh to\u00e1n kho\u1ea3ng c\u00e1ch.<\/p>\n

X\u1eed L\u00fd T\u00edn Hi\u1ec7u<\/h3>\n

Sau khi nh\u1eadn \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u ph\u1ea3n h\u1ed3i, vi \u0111i\u1ec1u khi\u1ec3n s\u1ebd t\u00ednh to\u00e1n kho\u1ea3ng c\u00e1ch d\u1ef1a tr\u00ean c\u00f4ng th\u1ee9c:<\/p>\n

Kho\u1ea3ng c\u00e1ch = (Th\u1eddi gian * T\u1ed1c \u0111\u1ed9 \u00e2m thanh) \/ 2<\/p>\n

T\u1ed1c \u0111\u1ed9 \u00e2m thanh trong kh\u00f4ng kh\u00ed kho\u1ea3ng 343 m\/s. Ph\u00e9p chia cho 2 l\u00e0 do th\u1eddi gian \u0111o \u0111\u01b0\u1ee3c bao g\u1ed3m c\u1ea3 th\u1eddi gian s\u00f3ng \u0111i v\u00e0 th\u1eddi gian s\u00f3ng ph\u1ea3n h\u1ed3i.<\/p>\n

Kh\u1eafc Ph\u1ee5c S\u1ef1 C\u1ed1<\/h3>\n

N\u1ebfu c\u1ea3m bi\u1ebfn kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng, h\u00e3y ki\u1ec3m tra l\u1ea1i c\u00e1c k\u1ebft n\u1ed1i, ngu\u1ed3n \u0111i\u1ec7n v\u00e0 code. \u0110\u1ea3m b\u1ea3o r\u1eb1ng b\u1ea1n \u0111\u00e3 ch\u1ecdn \u0111\u00fang ch\u00e2n tr\u00ean vi \u0111i\u1ec1u khi\u1ec3n v\u00e0 code \u0111\u01b0\u1ee3c vi\u1ebft ch\u00ednh x\u00e1c.<\/p>\n

Vi\u1ec7c k\u1ebft n\u1ed1i v\u00e0 s\u1eed d\u1ee5ng c\u1ea3m bi\u1ebfn si\u00eau \u00e2m kh\u00f4ng qu\u00e1 ph\u1ee9c t\u1ea1p n\u1ebfu b\u1ea1n l\u00e0m theo c\u00e1c b\u01b0\u1edbc h\u01b0\u1edbng d\u1eabn tr\u00ean. Hy v\u1ecdng b\u00e0i vi\u1ebft n\u00e0y \u0111\u00e3 cung c\u1ea5p cho b\u1ea1n nh\u1eefng th\u00f4ng tin c\u1ea7n thi\u1ebft \u0111\u1ec3 b\u1eaft \u0111\u1ea7u s\u1eed d\u1ee5ng c\u1ea3m bi\u1ebfn si\u00eau \u00e2m trong c\u00e1c d\u1ef1 \u00e1n c\u1ee7a m\u00ecnh.<\/p>\n","protected":false},"excerpt":{"rendered":"

C\u1ea3m bi\u1ebfn si\u00eau \u00e2m l\u00e0 m\u1ed9t lo\u1ea1i c\u1ea3m bi\u1ebfn s\u1eed d\u1ee5ng s\u00f3ng \u00e2m \u0111\u1ec3 \u0111o kho\u1ea3ng c\u00e1ch. Ch\u00fang ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch ph\u00e1t ra m\u1ed9t xung si\u00eau \u00e2m v\u00e0 \u0111o th\u1eddi gian \u0111\u1ec3 xung \u0111\u00f3 ph\u1ea3n x\u1ea1 l\u1ea1i t\u1eeb m\u1ed9t v\u1eadt th\u1ec3. Vi\u1ec7c k\u1ebft n\u1ed1i c\u1ea3m bi\u1ebfn si\u00eau \u00e2m \u0111\u00fang c\u00e1ch l\u00e0 r\u1ea5t quan tr\u1ecdng<\/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-49788","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\/49788","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=49788"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/posts\/49788\/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=49788"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/categories?post=49788"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/vi\/wp-json\/wp\/v2\/tags?post=49788"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}