Can be use accelerometer for Vibration measurement?

[william2399]

Posted on November 09, 2016 at 07:32

I am using LIS332AR mems chip for vibration measurement. Assembled this chip in PCB and PCB located vertical with respect to ground. For every 90 degree rotation of this chip corresponding X and Y axis value changed either +1g or -1g. for 0g condition, voltage will be vcc/2. If change in X axis as +1g Y to be 0g. So the voltage of X axis is (vcc/2)+0.6V(Sensitivity) and Y axis to be (vcc/2). While giving any vibration, it is generating spike for 0.6V(sensitivity) amplitude with 80ms time. Whether can be use this accelerometer for vibration measurement and also for tilt application.

[Miroslav BATEK]

Posted on November 11, 2016 at 11:43

Basically yes, but because the LIS332AR is NRND (not recommended for new design) I don’t recommend to use it in your project. Y

ou can rather use some modern digital accelerometer, so you don’t have to convert analog signal to digital value. For example LIS2HH12 or LIS2DH12. 

In any case for vibration and tilt measurement you will need some data processing in a microcontroller.

Best regards

Miroslav