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I am designing a high-frequency bench-top, electromagnetically-driven shaker. I need to sense the amplitude and phase of vibrations at various points to aid in the design process. I need a small, light-weight sensor that will operate from 1 kHz to 100 kHz. I know there are small piezo acceleration sensors, but they cost a couple of hundred dollars typically, and they benefit from a pre-amplifier (extra wires and power). Searching the 'net has turned up nothing else.

So, I am leaning in the direction of sensing velocity instead of acceleration. I am sensing periodic vibration, after all. If a velocity signal is differentiated (not hard) I will get acceleration. A cylindrical coil with a magnet inside that can stay still, due to inertia, while the coil moves with the shaker might do this. And it would have a low-impedance output. I can then differentiate this on an external circuit board for analysis.

Any thoughts?

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Good Morning Fellows...! This January, why not start the year with an ‪#‎emptyjar‬ and fill it with notes about good things that happen. Then, on ‪#‎NewYearEve‬, empty it and see what awesome stuff happened that year. We are keeping it for our #team so that we can hear from them what Great happened being at #VibraSens in #2016
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We wish you a ‪#‎MerryChristmas‬ & a VERY ‪#‎HappyNewYear‬ 2016.
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