Jump to content

IMU Brick 2.0 Sample rate

Brian Avila

Recommended Posts

I am confused about the sample rate values that I can use for my IMU and the configuration mode of it as well. In the documentation it states that the data output rate is 100Hz, so I understand that as the maximum sample frequency I can use, but it also states that the default bandwidth frequency (which cannot be changed in fusion mode) of the accelerometer is 62.5Hz, which doesn't makes sense because the Nyquist sampling criterion must be respected: Bandwidth = 1/2 Fs.

For my project I am obtaining data with the callback function each 8ms (2 * 62.5Hz), The data seem ok, but I still want to understand how the sampling rate and the bandwidth work in this sensor to be sure if I change my sampling rate, I won't end up out of the limits of the sensor and with erroneous data.


Link to comment
Share on other sites

Take a look at the datasheet of the BNO055: https://raw.githubusercontent.com/Tinkerforge/imu-v2-brick/master/datasheets/BNO055.pdf

Pages 26/27 for the accelerometer default configuration and page 31 for the sensor fusion data rate.

I don't know how this works exactly with the 100Hz vs 62.5Hz, unfortunately the sensor fusion algorithm that Bosch uses internally is proprietary.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...