The US-100 ultrasonic ranging module can provide 2cm-450cm non-contact distance sensing function, wide working voltage, self-contained temperature sensor to correct the ranging result, and also has GPIO, serial port and other communication methods. The dog is stable and reliable.
The module includes a transmitter, receiver and control circuit, which is a piezoelectric sensor that is fabricated using electrostrictive phenomena.
An alternating voltage is applied to the piezoelectric material slice (such as quartz crystal, piezoelectric ceramic, lead bismuth titanate, etc.) to cause it to generate electrostrictive vibration to generate ultrasonic waves. The resonance is generated when the frequency of the applied alternating voltage is equal to the natural frequency of the wafer, and the ultrasonic wave generated at this time is the strongest.
Piezoelectric ultrasonic receivers generally operate using the inverse effect of an ultrasonic generator. The structure is basically the same as that of an ultrasonic generator, and sometimes the same transducer is used as both a generator and a receiver.
When the ultrasonic wave acts on the piezoelectric wafer, the wafer is stretched and contracted, and alternating charges are generated at the two interfaces of the wafer, and then converted into a voltage and amplified to be sent to the measuring circuit, and finally recorded or displayed.
Precautions:
1. This module should not be connected with power. If you want to have a live connection, first connect the GND terminal of the module first, otherwise it will affect the normal operation of the module.
2. When measuring distance, the area of the measured object is not less than 0.5 square meters and the plane should be flat as much as possible, otherwise the measurement result will be affected.
3. If the test surface is not very regular or when testing a distant object, multiple measurements can be used to correct it.
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