■ELECTRICAL SPECIFICATION:
Center frequency(KHz) | 40.0KHz±1.0KHz |
Transmitting Sound Pressure Level(dB) | ____ |
Receive Sensitive(dB) | -68min(0dB=1V/μbar) |
-6 dB Directivity (deg) | 50° |
Ringing | ≤1.2ms |
Function | Receive |
capacitance (pF) | 2200±25﹪ |
Allowable Input Voltage(Vp-p) | 150(40KHz) |
Operating Temperature (℃) | -40～80℃ |
Storage Temperature (℃) | -40~+85℃ |
Metals of case | Aluminum |
Terminal | PIN |
Weight(g) | 0.6g |
■DIMENSIONS AND DIRECTIVITY:
■long-range ultrasonic sensor Working principle:
How it works The user inputs 40KH square wave signal from IN foot, namely the user sends out the high level from the one-chip computer IO mouth continuously, produce the square wave, the number of the square wave is generally about 10, issue the user to start the timer, start Timing, at this time, the ultrasonic transmitter ultrasonic began to send out when the ultrasound is back in front of the obstacles back to the ultrasound back to the receiving probe is received, this time, the OUT pin of the module will produce a from high-power When the user wants to stop the time counting, user can calculate the measuring distance according to the following formula: Measuring distance = (time * sound speed (340M / S)) / 2