Abstract: A wheel-speed sensor for generating signals representative of the wheel-speed of an individual wheel on a vehicle. Unlike known wheel-speed sensors, the wheel-speed sensor in accordance with the present invention is readily serviceable without disassembly of major components of the wheel assemblies and is relatively simple, and thus less expensive to manufacture, than known wheel-speed sensors. Two embodiments of the wheel-speed sensor in accordance with the present invention are disclosed. One embodiment relates to a “between-the-rows” wheel-speed sensor which includes a magnetic exciter ring that is adapted to be affixed to a rotating axle between rolling element rows of a wheel bearing. In an alternate embodiment of the invention, the wheel-speed sensor is configured to form a grease seal which typically inserts into the end of an axle tube. A wheel-speed sensor utilizes a multiple pole magnetic exciter ring that is adapted to be attached to a rotating axle shaft.

Abstract: An electronic circuit for automatically compensating for errors in the output signal of a displacement sensor. The electronic circuitry includes an analog to digital converter for converting an analog output signal from a linear displacement type sensor. The digital output signal from the sensor is processed by a microcontroller which automatically compensates for errors in the output signal. Ideal values, stored in an electronic memory, are used for compensation.