BNO055 Outputting Bad Linear Accel Data

Hi I am currently trying to use the Bno055 sensor in a project where I need to find velocity relatively accurately for 30 seconds.
I attempted to use the BNO055 in NDOF mode to get linear acceleration straight from the register this data however sees large amounts of drift due to inaccurate linear Accel readings.
I checked the calibration status and all sensors and the system are reading 3.
Is there any pointers someone may have on what I may be doing wrong.
I am using the breakout made by adafruit for a school project and would appreciate any feedback greatly.

Best reply by Jet

Hi Sir:

On the chart red line means the actual speed, and blue line mean the calculated speed by linear accel accumulating?

Maybe the linear accle data have a few drift, but it is not so big as your chart showed.

Could you keep the sensor horizental to move your wheel? Under this condition, we can calculate the moving speed by accumulating linear accel data or the raw accel data with reducing offset. And these data should sum up to zero or close to approach zero.

Could you try these kind of accel data or linear accel data to calculate speed or offer them to us?

I also recommand you to try other modes to lool into the results.

Thank you.

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