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¨ÛÃÊÀ½ÆÄ ¼±¼¼ ¸ðµâ HC-SR04
1. ÀÛµ¿Àü¾Ð:DC5V
2. ÀÛµ¿Àü·ù:15mA
3. ŽÁö°Å¸®: 2Cm ~ 4M
4. Å©±â: 45x20x15mm
ÀÛµ¿ ¹æ¹ý
(1) ÃÖ¼Ò 10us Á¤µµÀÇ Æ®¸®°Å¸¦ Ãâ·ÂÇÏ¿© ÃÊÀ½ÆÄ¼¾¼¸ðµâ¿¡ Trig ÇÉÀ¸·Î ÀԷ½ÃŲ´Ù.
(2) ÃÊÀ½ÆÄ¸ðµâÀº Trig ÇÉÀ¸·Î ÀÔ·ÂµÈ ½ÅÈ£¸¦ °¨ÁöÇϰí, ÀÚµ¿À¸·Î ¿©´ü°³ÀÇ 40kHz ÆÞ½º·Î À½ÆÄ¸¦ ¼Û½ÅÇÕ´Ï´Ù.
(3) ÀÌ ¶§ºÎÅÍ echoÇÉÀº High »óŰ¡ µÇ°í, À½ÆÄ°¡ ¹Ý»çµÇ¾î µ¹¾Æ¿Í¼ ¼ö½ÅµÇ¸é echoÇÉÀ¸·Î Low»óŰ¡ µÈ´Ù.
À½ÆÄ°¡ ¼Û½ÅµÇ¾î µ¹¾Æ¿Ã¶§ ±îÁöÀÇ High½ÅÈ£ÀÇ ÁֱⰡ ¿Õº¹½Ã°£ ÀÌ µË´Ï´Ù.
* À½¼ÓÀº ÃÊ´ç 340M ¶Ç´Â 29 microseconds ´ç 1Cm °Å¸®¸¦ À̵¿ÇÕ´Ï´Ù.
* À½ÆÄ´Â ¹Ý»çµÇ¾î µ¹¾Æ¿À°í, ¿Õº¹°Å¸® À̹ǷΠ2·Î ³ª´©¾î ÁÝ´Ï´Ù.
* °Å¸®(Cm) = ¿Õº¹½Ã°£(uSec) / 29 / 2
¨Û ±×¸² - ÀÛµ¿ ÆÞ½º
¨Û ±×¸² - ÇÉ ¹èÄ¡
¨Û ½Ç¹° ±Ô°Ý
ÁÖ¿ä »ç¾ç
1. ÀÛµ¿Àü¾Ð: DC5V
2. ´ë±âÀü·ù: <2mA
3. ·¹º§Ãâ·Â: high:5V ,low:0V
4. À¯µµ°¢µµ: not more than 15 degrees:
5. °¨Áö¹üÀ§: 2cm-400cm
6. Á¤ ¹Ð µµ: ÃÖ´ë 0.2cm
¨Û Çϵå¿þ¾î ±¸¼º
½ºÄÉÄ¡ ÀÛ¼º
< ÃʱâÈ ºÎºÐ >
< ¹Ýº¹ ÇÔ¼ö ºÎºÐ >
< °Å¸®±¸Çϱâ ÇÔ¼ö >
½Ã¸®¾ó ¸ð´ÏÅÍ °á°ú
¨Û ½Ã¸®¾ó ¸ð´ÏÅÍ °Å¸®ÃøÁ¤ °á°ú
const int TriggerPin = 13;
const int EchoPin = 12;
long Duration = 0;
void setup()
{
pinMode(TriggerPin, OUTPUT);
pinMode(EchoPin, INPUT);
Serial.begin(9600);
}
void loop()
{
digitalWrite(TriggerPin, LOW);
delayMicroseconds(2);
digitalWrite(TriggerPin, HIGH);
delayMicroseconds(10);
digitalWrite(TriggerPin, LOW);
Duration = pulseIn(EchoPin, HIGH);
long Distance_mm = Distance(Duration);
Serial.print("Distance = ");
Serial.print(Distance_mm);
Serial.println(" mm");
delay(1000);
}
long Distance(long time)
{
long DistanceCalc;
DistanceCalc = ((time/2.9)/2);
return DistanceCalc;
}
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