{"id":36,"date":"2012-08-09T01:21:41","date_gmt":"2012-08-09T04:21:41","guid":{"rendered":"http:\/\/darkraven1431.wordpress.com\/?p=36"},"modified":"2014-05-28T09:09:11","modified_gmt":"2014-05-28T12:09:11","slug":"sensor-ultrasonico-hc-sr04","status":"publish","type":"post","link":"http:\/\/lordraven.info\/blog\/?p=36","title":{"rendered":"Sensor Ultras\u00f3nico HC-SR04"},"content":{"rendered":"

La semana pasada me llego (de mi proveedor favorito) un m\u00f3dulo HC-SR04. Es un sensor ultrasonico de 4 pines.<\/p>\n

\"\"<\/a>
\n<\/a><\/p>\n

El modo de uso es el siguiente:
\nSe aplica un pulso de 10us (microsegundos) en el pin Trigger<\/strong> (l\u00edneas 17 – 21). Esto le dice al m\u00f3dulo que emita una secuencia de pulsos (10 pulsos de 40kHz) y luego espera el retorno de la se\u00f1al en el pin Echo<\/strong>. Si asi fuese, el tiempo que este en nivel logico alto dicho pin, ser\u00e1 el tiempo (\"t_H\" en \"\mu\"seg) desde que salio la se\u00f1al hasta que la recibio.<\/p>\n

El c\u00e1lculo de la distancia se realiza midiendo el tiempo que tarda la se\u00f1al en ir y volver,\u00a0 multiplic\u00e1ndolo por la velocidad del sonido y dividiendolo por 2.<\/p>\n

\"<\/p>\n

En la siguiente f\u00f3rmula, ya tenemos aplicadas las unidades que usaremos (\"t_H\" en \"\mu\"s y \"l\" en \"cm\")<\/p>\n

\" l = 0,017 t_H\"<\/p>\n

\r\n\r\n\/\/ Codigo basico para probar el sensor\r\n\/\/ Arduino UNO\r\n\r\n#define pinTrigger 9\r\n#define pinEcho 8\r\n\r\nvoid setup()\r\n{\r\n  pinMode(pinTrigger, OUTPUT);\r\n  pinMode(pinEcho, INPUT);\r\n  Serial.begin(9600);\r\n  Serial.println("Prueba de sonar");\r\n}\r\n\r\nvoid loop()\r\n{\r\n  digitalWrite(pinTrigger, LOW);\r\n  delayMicroseconds(2);\r\n  digitalWrite(pinTrigger, HIGH);\r\n  delayMicroseconds(10);\r\n  digitalWrite(pinTrigger, LOW);\r\n  long tH = pulseIn(pinEcho, HIGH);\r\n\r\n  long distancia = tH * 0.017;\r\n  Serial.print(distancia);\r\n  Serial.println(" cm");\r\n  delay(1000);\r\n}\r\n\r\n<\/pre>\n
Informaci\u00f3n \u00fatil:<\/span><\/h5>\n
Datasheet<\/a><\/p>\n
HC-SR04<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
La semana pasada me llego (de mi proveedor favorito) un m\u00f3dulo HC-SR04. Es un sensor ultrasonico de 4 pines. El modo de uso es el siguiente: Se aplica un pulso de 10us (microsegundos) en el pin Trigger (l\u00edneas 17 – 21). Esto le dice al m\u00f3dulo que emita una secuencia de pulsos (10 pulsos de […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[32,33,20,24],"class_list":["post-36","post","type-post","status-publish","format-standard","hentry","category-arduino","tag-arduino","tag-electronic","tag-hc-sr04","tag-sensor"],"_links":{"self":[{"href":"http:\/\/lordraven.info\/blog\/index.php?rest_route=\/wp\/v2\/posts\/36","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/lordraven.info\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/lordraven.info\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/lordraven.info\/blog\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/lordraven.info\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=36"}],"version-history":[{"count":13,"href":"http:\/\/lordraven.info\/blog\/index.php?rest_route=\/wp\/v2\/posts\/36\/revisions"}],"predecessor-version":[{"id":496,"href":"http:\/\/lordraven.info\/blog\/index.php?rest_route=\/wp\/v2\/posts\/36\/revisions\/496"}],"wp:attachment":[{"href":"http:\/\/lordraven.info\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=36"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/lordraven.info\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=36"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/lordraven.info\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=36"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}