Acceleration measurement

[hkm]

Dear All

I'm a new labview user

How to measure acceleration and deceleration of a vehicle?

I mount an accelerometer to the cowl panel firewall in a car, but instead of mesuring the vehicle acceleration, the sensor measure the vibration of the firewall panel. What is the correct method to get the vehicle acceleration?

I used IEPE accelerometer with g range up to 500g, frequency range 3-18kHz.

Please advice

Thank you so much

[Nihil]

hello hkm. accelerometers are very noisy sensors. you could start by adding a low pass filter. probably one with a cut off frequency at 2hz and see if that's good enough. You could use even lower frequencies.

Check if you have a filter block in your labview package. if not you can program a very simple one and that should be enough.

[hkm]

hi Nihil

Thanks for your feedback. I did use low pass filter, but with higher cut off frequency. I'll try as your suggestion at 2Hz once i work with the test again.

[Nihil · Accepted solution]

i worked with accelereometers once, we used an accel and a gyro to determinie the roll axis of a platform. we used complementary filters (a lowpass for the accel and a high pass for the gyro) and the cut-off frequency we ended up using was 0.5hz.

good luck.