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    How can I select the right Accelerometer?

    Occasional Visitor

    How can I select the right Accelerometer?

    I am designing a sensor to measure vibration from industrial equipment.

    The main required characteristics of the accelerometer are listed below:

    - Acceleration Range - up to 8g

    - Type - Digital

    - Output Type - I²C, SPI

    - Axis - X / Y / Z

    - Bandwidth - minimum of 1.6KHz (as higher the better)

    - Resolution - 16 bits

    I found a lot of accelerometer that meet the specifications above, although I am not being able to understand how can I guarantee a good resolution in high frequencies of the accelerometer.

    I already tested the MPU9250 in a shaker and the results in low frequency (until 150Hz) is reasonable, although in high frequencies (from 150Hz until 1kHz) it is horrible as shown below:

    ps- the blue dots are the reference accelerometer (piezoeletric) and the orange dot is the MPU9250.

     

    My question is:

    • How can I understand from the datasheet that the resolution in high frequency will be ok?

     

    1 REPLY 1
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    Community Moderator
    Community Moderator

    Re: How can I select the right Accelerometer?

    The component of choice would be BMA456.

    However, note that the maximum data rate is 1600Hz, and the maximum filter bandwidth is 684Hz (3dB cutoff frequency).

    o_o
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