Electronics > Beginners
Are there non-contact vibration sensors for Arduino or PC?
engineheat:
I need to sense vibration of an object, but I can't use accelerometers or piezo sensor because those requires touching the object, which is impractical in my application.
I hope to use an optic based approach, or any other method that can sense the degree of vibration without contact. I need to be able to feed the data into an Arduino or a PC.
I don't want to have to buy a big/expensive industrial type device. Size and price matters. However, I can place the sensor very close (millimeters) to the object. Any ideas?
thanks
MavMitchell:
Any idea of the frequency and amplitude of the vibration. Is the body metal..
jazper:
Frequency and amplitude matter..
accelerometers on a membrane could work (think a speaker cone)
A microphone could work depending on frequency.. or ultrasonics if the amplitude is high..
jazper:
http://www.warsash.com.au/products/vibration-measurement/LASER-DOPPLER-VIBROMETRY.php
https://en.wikipedia.org/wiki/Laser_Doppler_vibrometer
https://www.sciencedirect.com/science/article/pii/S0041624X97001029
David Hess:
Optical interferometry can be used to remotely measure vibration. Capacitance sensing could also work which means reluctance sensing is a possibility also.
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