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Magnetoresistive Sensors for High Resolution Position Encoding
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English
Abstract
For the measurement and control of angular position or rotational speed in automobiles, the environmental conditions have led manufacturers to mainly specify magnetic sensors. They are able to withstand high shock and vibration, the presence of oil, dust or salt spray, and can operate over a temperature range as wide as -40°C to +150°C. Magnetic sensors generally meet these goals better than optical devices. Increasingly, though, modern engine control requirements call for much higher resolutions, and this paper describes how the environmental conditions are accomplished in a high resolution magnetic device. Three different configurations that are applicable to automobiles are described: a stand-alone encoder mounting to a stub shaft, a stand-alone encoder mounting over a through shaft, and a modular encoder comprising independent encoder wheel and sensor components.
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Citation
Campbell, P., "Magnetoresistive Sensors for High Resolution Position Encoding," SAE Technical Paper 930234, 1993, https://doi.org/10.4271/930234.Also In
References
- Campbell, P. “High Resolution Incremental Magnetic Encoders” 19th. Symposium on Incremental Motion Control Systems and Devices June 1990 Incremental Motion Control Systems Society