Difference between revisions of "Ultrasonic range measurement module"
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==Introduction== | ==Introduction== | ||
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SRF-05 is the latest model of this series of ultrasonic distance measuring | SRF-05 is the latest model of this series of ultrasonic distance measuring | ||
sensor.This ultrasonic ranger has an approximate range of 3 cm to 4 m. This ranger has a logic line used to trigger a pulse and the echo is returned on a second line. Minimal power requirements and a compact, self contained design make this a versatile range finder. | sensor.This ultrasonic ranger has an approximate range of 3 cm to 4 m. This ranger has a logic line used to trigger a pulse and the echo is returned on a second line. Minimal power requirements and a compact, self contained design make this a versatile range finder. | ||
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==Working principal== | ==Working principal== | ||
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1.Adopt IO trigger through supplying at least 10us sequence of high level signal. | 1.Adopt IO trigger through supplying at least 10us sequence of high level signal. | ||
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==Usage== | ==Usage== | ||
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[[File:Ultrasonic table.jpg]] | [[File:Ultrasonic table.jpg]] | ||
| − | + | User guide: http://www.robot-electronics.co.uk/acatalog/Ultrasonic_Rangers.html | |
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==Example code== | ==Example code== | ||
int inputPin=4; // define ultrasonic signal receiver pin ECHO to D4 | int inputPin=4; // define ultrasonic signal receiver pin ECHO to D4 | ||
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} | } | ||
void loop() | void loop() | ||
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{ | { | ||
digitalWrite(outputPin, LOW); | digitalWrite(outputPin, LOW); | ||
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} | } | ||
| − | ==Click here to buy [http://www.geeetech.com/ultra-sonic-range-measurement-module-p-72.html Ultra Sonic range measurement module] | + | ==How to buy== |
| + | Click here to buy [http://www.geeetech.com/ultra-sonic-range-measurement-module-p-72.html Ultra Sonic range measurement module] | ||
Latest revision as of 00:50, 23 May 2012
Introduction
SRF-05 is the latest model of this series of ultrasonic distance measuring sensor.This ultrasonic ranger has an approximate range of 3 cm to 4 m. This ranger has a logic line used to trigger a pulse and the echo is returned on a second line. Minimal power requirements and a compact, self contained design make this a versatile range finder.
Description
- Working Voltage : 5V(DC)
- Static current: Less than 2mA.
- Output signal: Electric frequency signal, high level 5V, low level 0V.
- Sensor angle: Not more than 15 degrees.
- Detection distance: 2cm-450cm.
- High precision: Up to 0.3cm
- Input trigger signal: 10us TTL impulse
- Echo signal : output TTL PWL signal
Working principal
1.Adopt IO trigger through supplying at least 10us sequence of high level signal. 2.The module automatically send eight 40khz square wave and automatically detect whether receive the returning pulse signal. 3.If there is signals returning, through outputting high level and the time of high level continuing is the time of that from the ultrasonic transmitting to receiving. Test distance = (high level time * sound velocity (340M/S) / 2.
Usage
User guide: http://www.robot-electronics.co.uk/acatalog/Ultrasonic_Rangers.html
Example code
int inputPin=4; // define ultrasonic signal receiver pin ECHO to D4
int outputPin=5; // define ultrasonic signal transmitter pin TRIG to D5
void setup()
{
Serial.begin(9600);
pinMode(inputPin, INPUT);
pinMode(outputPin, OUTPUT);
}
void loop()
{
digitalWrite(outputPin, LOW);
delayMicroseconds(2);
digitalWrite(outputPin, HIGH); // Pulse for 10μs to trigger ultrasonic detection
delayMicroseconds(10);
digitalWrite(outputPin, LOW);
int distance = pulseIn(inputPin, HIGH); // Read receiver pulse time
distance= distance/58; // Transform pulse time to distance
Serial.println(distance); //Ourput distance
delay(50);
}
How to buy
Click here to buy Ultra Sonic range measurement module
