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    6 axis (BMI085) or 9 axis (BNO055) IMU - What are the advantages and are there advantages?

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    Occasional Visitor

    6 axis (BMI085) or 9 axis (BNO055) IMU - What are the advantages and are there advantages?

    Dear all,
    for our development project (a mobile device with a camera system) we are planning to use the BNO055 (9-axis) IMU because of the sensor fusion. We are also discussing to use the BMI085 IMU (6-axis, no sensor fusion). Is the accuracy of the IMU with the 9-axis better than the 6-axis IMU? Is the accuracy difference recognizable?

    Are there other important issues for choosing the BNO055 or the BMI085? I also in the datasheet that the BMI085 has less operating power supply.

    The bandwidth of the BNO055 has 1000 Hz and the BMI085 from 6 to 684 Hz. Is that recognisable in the practical use (our typical use is holding a smartphone an taking a picture and so there are no fast movements of the device with the IMU)?

    Thank you!

    Thank you for your help! 

    1 REPLY 1
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    Community Moderator

    Re: 6 axis (BMI085) or 9 axis (BNO055) IMU - What are the advantages and are there advantages?

    Hi,

    Using which sensor are mostly depends on your demands.

    BNO055 have accel/gyro/magnetic sensor,  could output absolute orientation with Fusion software. If you need direct Euler angle or Quaternion vector, BNO055 is suitable.

    BMI088 have accel/gyro, could sync accel/gyro data.

    Regarding bandwidth, do you mean gyro bandwidth? 

     

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