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    BMI160 - Accelerometer Range

    BMI160 - Accelerometer Range

    Katie2020
    New Poster

    Hi,

    I have converted the accelerations raw data into m/s^2 as shown here: https://community.bosch-sensortec.com/t5/MEMS-sensors-forum/BMI160-converting-data-with-resolution/t...

    I would like to understand the impact of the range on the actual data. At the minute, for my application, I don't know what accuracy I need yet. Understanding the impact of the range will help me choose the correct one for my application. To try to understand I tried different ranges. I get different value for accelereation on z-axis (az) which is meant to equal to g=9.8. 

    Here what I get for a az raw data equal to 2164. 

    with +/- 16G: 10.365 m/s^2. 

    with +/- 8G: 5.180 m/s^2. 

    Could you help me please understand the difference between these 2 accelerations? My undertanding is the sensor should measure g on the z axis. So I am supposed to get 9.81. 

    Many thanks

    Katie

    5 REPLIES 5

    Many thanks. It is clear to me now.

    I set the ranges as follows: 2G and 250 deg/s. I am reading the ranges back and I am getting the value 3 for both. I thought I would get 2 for the accelerometer and 250 for the gyro. Am I doing something wrong? 

     

    uint8_t range;
    int8_t rslt;
    uint16_t len = 1;
     rslt=bmi160_get_regs(BMI160_ACCEL_RANGE_ADDR, &range, len, &ss_sensor);

     

     

    Thanks a lot for your help.

    Here is my code:

     

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