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Old 6th Apr 2019, 2:23 pm   #6
Argus25
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Join Date: Oct 2016
Location: Maroochydore, Queensland, Australia.
Posts: 2,679
Default Re: Shock detecting mechanisms?

Al,

Geophone sensors are very good. These use a magnet on a spring moving inside a coil. It generates voltage proportional to the velocity of the magnet, different from a MEMS sensor that produces a signal proportional to acceleration, and the Geophone responds over a range from a few Hz to 1000Hz. There is a small peak in the response at 10Hz but you can flatten that with a parallel resistor.

They both can be used to make a Seismograph. For example Silicon Chip published a MEMS sensor seismograph with an Arduino and they recently upgraded it by adding the Geophone sensor, because it is much more sensitive than the MEMS sensor.

Here is a typical one from one of the many ebay sellers, this link is merely to show you the picture of one:

https://www.ebay.com/itm/Geophone-Se...gAAOSw05tacOhs
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