New Generation of Intelligent Wheel Speed Sensors for ABS Application

Paper #:
  • 2000-01-0082

Published:
  • 2000-03-06
Citation:
Pusch, S., "New Generation of Intelligent Wheel Speed Sensors for ABS Application," SAE Technical Paper 2000-01-0082, 2000, https://doi.org/10.4271/2000-01-0082.
Author(s):
Pages:
14
Abstract:
This paper describes a smart sensor for rotational speed measurements, consisting of a magnetoresistive sensor, the signals from which are processed by a new generation of signal conditioning electronics. The system is specialized for ABS applications with its harsh automotive environmental conditions. Data is provided using three levels via its two-wire current interface. The mixed-signal approach of the electronics allows transmission of a digital protocol, direction recognition, determination of an “air gap measure”, large air gap due to dynamic signal conditioning with several feed-back loops and true power-on with zero-speed behavior. Limitations of the former sensor generation are explained and it is shown how these are overcome by the new electronics.
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