{"id":684,"date":"2015-11-21T16:52:56","date_gmt":"2015-11-21T13:52:56","guid":{"rendered":"http:\/\/arduinoshop.ro\/?p=684"},"modified":"2017-08-02T09:55:17","modified_gmt":"2017-08-02T06:55:17","slug":"folosirea-senzorului-de-distanta-cu-ultrasunete-hc-sr04","status":"publish","type":"post","link":"https:\/\/roboromania.ro\/?p=684","title":{"rendered":"Folosirea senzorului de distanta cu ultrasunete HC-SR04 – pentru \u00eencep\u0103tori"},"content":{"rendered":"

Folosirea senzorului de distanta cu ultrasunete HC-SR04<\/strong><\/span><\/h2>\n

\"HC-SR04-roboromania\"<\/a><\/p>\n

Piese necesare :<\/p>\n

1 x plac\u0103 Arduino UNO R3
\n1 x Senzor de distan\u0163\u0103 cu ultrasunete HC-SR04
\n3 x LED (plus 3 rezisten\u0163e de 1 k\u2126 pentru aceste leduri)
\ncabluri de leg\u0103tur\u0103 necesare \u00eentre piese \u015fi plac\u0103<\/p>\n

\"Uno-roboromania-fata\"<\/a><\/p>\n

Algoritm :<\/strong><\/p>\n

Ini\u0163ial ledurile sunt oprite.
\nLa distan\u0163a cea mai mare (eu am specificat \u00een cod peste valoarea 3000) toate ledurile sunt de asemenea oprite.<\/p>\n

Dac\u0103 se detecteaz\u0103 un obstacol \u00eentre valorile 2001 \u015fi 3000 se aprinde 1 led (aproximativ \u00eentre 30-40 cm distan\u0163\u0103).
\nDac\u0103 obiectul se apropie \u00eentre valorile 1000 si 2000 am setat s\u0103 se aprind\u0103 2 leduri.
\nDac\u0103 obiectul e foarte aproape de senzor (sub 1000 respectiv sub 10-15 cm) am setat s\u0103 se aprind\u0103 toate 3 ledurile.<\/p>\n

Montare :<\/strong><\/p>\n

Senzorul are 4 pini respectiv:<\/p>\n

VCC<\/strong> de la senzor se cupleaza la +5V de pe placa arduino.
\nTRIG<\/strong> de la senzor se cupleaz\u0103 la unul din pinii digitali de pe placa arduino (\u00een cod am setat pinul 2)
\nECHO<\/strong> de la senzor se cupleaz\u0103 la un alt pin digital de pe placa arduino (\u00een cod am setat pinul 3)
\nGND<\/strong> de la senzor se cupleaz\u0103 la unul din pinii GND de la arduino<\/p>\n

LED-urile se cupleaz\u0103 \u015fi ele (prin intermediul unei rezisten\u0163e de 1 k\u2126) la pinii 8,9 \u015fi 10 iar negativul de la leduri la GND de la arduino.<\/p>\n

Codul necesar (sketch) :<\/strong><\/p>\n

 <\/p>\n

\/*
\n* Ultrasound model: HC-SR04
\n* Senzor pins\u00a0 | Arduino Board
\n* VCC la 5V
\n* TRIG la Digital pin 2
\n* ECHO la Digital pin 3
\n* GND la GND
\n* LED1 la Digital pin 8
\n* LED2 la Digital pin 9
\n* LED3 la Digital pin 10
\n*\/<\/p>\n

\/\/ initialize the necessary ports
\nint usTrigger = 2;
\nint usEcho = 3;
\nint led1 = 8;
\nint led2 = 9;
\nint led3 = 10;<\/p>\n

void setup() {
\n\/\/ start ultrasound
\npinMode(usTrigger, OUTPUT);
\npinMode(usEcho, INPUT);
\n\/\/ start leds
\npinMode(led1, OUTPUT);
\npinMode(led2, OUTPUT);
\npinMode(led3, OUTPUT);
\n}<\/p>\n

void loop() {
\n\/\/ Initiate ultrasonic speaker
\ndigitalWrite(usTrigger, HIGH);
\ndelayMicroseconds(10);
\ndigitalWrite(usTrigger, LOW);<\/p>\n

\/\/ Reading out the signal strength
\nlong timecount = pulseIn(usEcho, HIGH);
\n\/\/ if more than 3000 all LEDs stop.
\nif ( timecount > 3000 ) {
\ndigitalWrite(led1, LOW);
\ndigitalWrite(led2, LOW);
\ndigitalWrite(led3, LOW);
\n}
\n\/\/ If it’s between 2001 and 3000 start LED 1
\nif ( timecount > 2000 && timecount <= 3000 ) {
\ndigitalWrite(led1, HIGH);
\ndigitalWrite(led2, LOW);
\ndigitalWrite(led3, LOW);
\n}
\n\/\/ If it’s between 1000 and 2000 start LED 1 and 2
\nif ( timecount >= 1000 && timecount <= 2000 ) {
\ndigitalWrite(led1, HIGH);
\ndigitalWrite(led2, HIGH);
\ndigitalWrite(led3, LOW);
\n}
\n\/\/ If it’s under 1000 turn all LEDs
\nif ( timecount < 1000 ) {
\ndigitalWrite(led1, HIGH);
\ndigitalWrite(led2, HIGH);
\ndigitalWrite(led3, HIGH);
\n}
\n\/\/ Wait 0.1 seconds before the next reading.
\ndelay(100);
\n}<\/p>\n

 <\/p>\n

Aceast\u0103 aplica\u0163ie se poate dezvolta de exemplu pentru un robot autonom care ocole\u015fte obstacolele.<\/p>\n

Succes !<\/span><\/p>\n

Colectivul Roboromania<\/p>\n","protected":false},"excerpt":{"rendered":"

Folosirea senzorului de distanta cu ultrasunete HC-SR04 Piese necesare : 1 x plac\u0103 Arduino UNO R3 1 x Senzor de distan\u0163\u0103 cu ultrasunete HC-SR04 3 x LED (plus 3 rezisten\u0163e de 1 k\u2126 pentru aceste leduri) cabluri de leg\u0103tur\u0103 necesare \u00eentre piese \u015fi plac\u0103 Algoritm : Ini\u0163ial ledurile sunt oprite. La distan\u0163a cea mai mare […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[176],"tags":[],"class_list":["post-684","post","type-post","status-publish","format-standard","hentry","category-tutoriale-arduino"],"_links":{"self":[{"href":"https:\/\/roboromania.ro\/index.php?rest_route=\/wp\/v2\/posts\/684","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/roboromania.ro\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/roboromania.ro\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/roboromania.ro\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/roboromania.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=684"}],"version-history":[{"count":8,"href":"https:\/\/roboromania.ro\/index.php?rest_route=\/wp\/v2\/posts\/684\/revisions"}],"predecessor-version":[{"id":3404,"href":"https:\/\/roboromania.ro\/index.php?rest_route=\/wp\/v2\/posts\/684\/revisions\/3404"}],"wp:attachment":[{"href":"https:\/\/roboromania.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=684"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/roboromania.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=684"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/roboromania.ro\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=684"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}