Ultrasonic Ranging Module HC-SR04
●Product features:
Ultrasonic ranging module HC-SR04provides2cm-400cm non-contact measurement function,the ranging accuracy can reach to3mm.The modules includes ultrasonic transmitters,receiver and control circuit.The basic principle of work:
(1)Using IO trigger for at least10us high level signal,
烤肉如何腌制(2)The Module automatically nds eight40kHz and detect whether there is a pul signal back.
(3)IF the signal back,through high level,time of high output IO duration is the time from nding ultrasonic to returning.
Test distance=(high level tim e×velocity of sound(340M/S)/2,
●Wire connecting direct as following:
●5V Supply
●Trigger Pul Input
●Echo Pul Output家庭教育分享
●0V Ground
●Electric Parameter
Working V oltage DC5V
Working Current15mA生活因亲情而精彩600字
Working Frequency40Hz
Max Range4m
Min Range2cm
图式Measuring Angle15degree
Trigger Input Signal10uS TTL pul
Echo Output Signal Input TTL lever signal and the range in
proportion
Dimension45*20*15mm
●Timing diagram
英语从句
The Timing diagram is shown below.You only need to supply a short10uS pul to the trigger input to start the ranging,and then the module will nd out an8cycle burst of ultrasound at40kHz and rai its echo.The Echo is a distance object that is pul width and the range in proportion.You can calculate the range through the time interval between nding trigger signal and receiving echo signal.Formula:uS/58=centimeters or uS/148=inch;or:the range=high level time*velocity(340M/S)/2;we suggest to u over60ms measurement cycle,in order to prevent trigger signal to the echo signal.
党风廉政
●Attention:
天安门英文●The module is not suggested to connect directly to electric,if connected
electric,the GND terminal should be connected the module first,otherwi, it will affect the normal work of the module.
质权人●When tested objects,the range of area is not less than0.5square meters
and the plane requests as smooth as possible,otherwi,it will affect the results of measuring.
