A1.2 Noise-free Inspection of Rotary Encoder Magnets
- SMSI 2020
(did not take place because of Covid-19 virus pandemic)
- SMSI 2020 - Sensors and Instrumentation
- A1 Magnetic Sensors
- K. Vervaeke - Magcam NV, Leuven (Belgium)
- 43 - 44
We report on a method to measure a noise-free magnetic field distribution of rotary encoder sensor magnets, based on Magcam’s established 3-axis magnetic field camera technology. This method in-volves measuring the 3-axis magnetic field distribution in a 2D plane at close distance above the mag-net and extrapolating this field distribution into a 3D volume using a patented ‘Distance Filter’ algo-rithm that yields virtually noise-free data at larger distances. This powerful method allows to evaluate the magnetic field distribution and the magnet’s intrinsic angular error, with a resolution better than the measurement resolution of the originally measured plane.