Sound and Vibration Measurement: First Demo of the test jig

26 Apr 2022

Sound and Vibration Measurement: First Demo of the test jig

For the Sound and Vibration Measurement Hat for Raspberry Pi road test, I'm reviewing Measurement Computing's IEPE Measurement DAQ HAT for Raspberry Pi.
Time to demonstrate the first setup of the Automated Vibration Test Jig.
In this video, the flow lets the vibration table shake from 20 to 40 Hz, with 2 Hz increment.
At each step, the MCC172 takes 32.768 samples, then calculates the RMS value of that result.
This gets written to a data file.

The video is real time. You will not hear the lowest frequency because my microphone (and your speaker) don't capture that. You can see the sample speed of the DAQ by looking at the LED blink time.
Excel output attached:

daqhatmcc172_0.xlsx

Link to all posts.

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dougw over 3 years ago

Interesting setup. It looks like a large mass for the speaker to move, which will of course affect frequency response, but a great way to at least exercise some control of stimulus frequency/acceleration.
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Jan Cumps over 3 years ago in reply to dougw

(after re-reading) Are you refering to the mass of the sensor setup? If yes: that is indeed heavy and big. More suited for measuring motors, gearboxes and machines.

Here's the weight ( in grams, I had to take the kit apart because my scale overflowed)
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Jan Cumps over 3 years ago in reply to dougw

(after re-reading) Are you refering to the mass of the sensor setup? If yes: that is indeed heavy and big. More suited for measuring motors, gearboxes and machines.

Here's the weight ( in grams, I had to take the kit apart because my scale overflowed)
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