Specifications

1.Electronic Technology Experiment Device
2.Ultrasonic ranging module

vocational training equipment, Ultrasonic ranging module

 

 

 

Product introduction:

 

HC-SR04 Type Ultrasonic RangingModule provides 2cm-400cm non-contact distance sensing capabilities,ranging accuracy can reach high to 3mm; The module comprises an ultrasonic transmitter,receiver andcontrol circuitry.

 

 

 

Product application areas:
   Robot obstacle avoidance, the objectdistance,level detection, publicsecurity,parkingdetection

 

 

 

Technical parameters:

 

Voltage: DC5V
Staticcurrent: less than2mA

 

OutputLevel: High5V Low 0V

 

Sensor angle: ≤15 degrees
Detectiondistance: 2cm-450cm
accurate up to0.2cm
Wiring:VCC, trig (control side), echo (receiving end), GND

 

 

 

Working Principle

 

 

(1) using IO port TRIG trigger location, to the high level signal of at least 10us

 

(2) module automatically sends 8 40KHz Fang Bo, automatic detecting whether a signal return;

 

(3) a signal return, a high level is output through the IO port ECHO, time duration of high level is ultrasonic from launch to return.The test distance = (high level time * speed of sound (340M/S)) /2;

 

 

 

 

 

Method of use:

 

A control port with a 10US above high level, can wait for high level output at the receiving port. An output can drive the timer, when the mouth becomes low level can read the timer value, then the ranging time, can calculate the distance. This constant cycle measuring, which get you moving measurement value.