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LIS2DH12: do I need a different accelerometer?

Question asked by Gore.Daniel on Feb 28, 2017
Latest reply on Feb 28, 2017 by Miroslav B

Hey,

   In my application there is a lot of high frequency vibration that I am not interested in. The goal is to detect acceleration along a single axis that lasts 200ms or longer, but is generally between 1/2 and 1/10 the magnitude of the noise (vibration readings). Finally, for performance reasons it is not feasible to read all the data from the accelerometer, an interrupt should only trigger when it is likely an event has occurred. 

 

 

   What I am trying currently: Stream to FIFO mode, adjusting threshold and duration in both 6D and AOI modes. 6D fails to trigger because vibrations send the reported acceleration bouncing back and forth between positive and negative values. AOI will trigger constantly because of the large magnitude of the vibrations. Is there anything else worth trying before looking for a different product? It seems like a product with a built in low-pass filter could be required. 

 

Thanks!

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