3DM: Calibration

Calibration is now optional, you can use the system without calibrating. Note that some metrics that rely on calibration and bike measurement will not be available. Also the joint motion values will potentially be less accurate.

The calibration process has been simplified from V1 - only one screen as the bike orientation is now detected automatically. You should also find that the point acquisition is faster.

The 5 points that are captured allow us to correct for pitch, yaw and roll so it doesn’t matter whether the bike or camera is level or perfectly aligned.

To begin calibration click the button at the bottom of the liveview:

The calibration popup window will appear. You will use the wand to acquire specific points on the bike (or fit bike). The in-system help will guide you through the required locations.

The current point will be highlighted in Orange text, once the system has acquired that point the text becomes green and moves to the next location. The system will not collect another point within 50mm of the last one so there is no risk in holding the wand in one location for too long.

The point collection process is demonstrated in this video:

https://vimeo.com/144076695

The system waits until the wand has been steady for 30 samples before acquiring a point. This usually only takes 1 second so it is advisable to cover the locator triangles until the wand is in position.

If you are finding that the system is not picking up a point you may need to alter the angle of the wand until the Kinect can recognise it properly (as shown with the front axle in the video).

Please note that the most important elements of the calibration process are that points 1,2 and 3 need to be in the same plane and that points 4 and 5 need to be the same height when the bike is on flat ground (they may not be the same height when it is on a trainer).

Once the process is complete click:

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