Ultraschall Distanz Mess-Modul HC-SR04

Wenn Sie ein Ultraschall Distanz-Messmodul suchen, ist der HC-SR04 eine hervorragende Wahl.
Der Sensor zeichnet sich durch stabile Messwerte und hohe Genauigkeit aus.

Spezifikationen:

• Versorgungsspannung: 5V DC
• Leerlaufstrom: <2mA
• Erfasster Bereich: <15°
• Messdistanz: 2cm – 500 cm
• Auflösung: 0.3 cm 

Demo Source für den Arduino

/*
*
* Complete Guide for Ultrasonic Sensor HC-SR04
*
Ultrasonic sensor Pins:
VCC: +5VDC
Trig : Trigger (INPUT) - Pin11
Echo: Echo (OUTPUT) - Pin 12
GND: GND
*/

int trigPin = 11; // Trigger
int echoPin = 12; // Echo
long duration, cm, inches;

void setup() {
//Serial Port begin
Serial.begin (9600);
//Define inputs and outputs
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
}

void loop() {
// The sensor is triggered by a HIGH pulse of 10 or more microseconds.
// Give a short LOW pulse beforehand to ensure a clean HIGH pulse:
digitalWrite(trigPin, LOW);
delayMicroseconds(5);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);

// Read the signal from the sensor: a HIGH pulse whose
// duration is the time (in microseconds) from the sending
// of the ping to the reception of its echo off of an object.
pinMode(echoPin, INPUT);
duration = pulseIn(echoPin, HIGH);

// Convert the time into a distance
cm = (duration/2) / 29.1; // Divide by 29.1 or multiply by 0.0343
inches = (duration/2) / 74; // Divide by 74 or multiply by 0.0135

Serial.print(inches);
Serial.print("in, ");
Serial.print(cm);
Serial.print("cm");
Serial.println();

delay(250);
}