The location of fiducial marks and the speedometer needle guides calibration.
Calibration involves controlling a demagnetizer and driving a DC servomotor.
We determined that a PC-based system combined with commercial hardware and software would meet the user's requirements. The test stand provides a camera, a computer, and a monitor on which an operator can watch a calibration run and its results. The operator places a speedometer in the test stand and starts a calibration. The most challenging part of the system involved developing the image-analysis software. We concentrated our efforts on developing application-specific algorithms.