英语文章下载Ultrasonic Ranging Module HC-SR04
改变自己英文
●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,
(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:白相
●5V Supply
●Trigger Pul Input
●Echo Pul Output
●0V Ground
●Electric Parameter
Working V oltage DC5Vwash
Working Current15mA
高级会计师考试科目
Working Frequency40Hz
Max Range4m
Min Range2cm
Measuring Angle15degree许多人
Trigger Input Signal10uS TTL pul
Echo Output Signal Input TTL lever signal and the range in
号码的英文proportion
Dimension45*20*15mm
●Timing diagram
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.
●Attention:
●The module is not suggested to connect directly to electric,if connected教育部留学服务中心地址
雪场女孩electric,the GND terminal should be connected the module first,otherwi, it will affect the normal work of the module.
●When tested objects,the range of area is not less than0.5square meters
leafletsand the plane requests as smooth as possible,otherwi,it will affect the results of measuring.
