ERROR CORRECTION STRUCTURE OF WHEEL SPEED SENSOR AND WHEEL BEARING WITH ROTATION DETECTOR

摘要

PROBLEM TO BE SOLVED: To provide an error correction structure of a wheel speed sensor capable of detecting rotational speed and a rotational position with high accuracy by correcting a pulse error component owing to frequency characteristics of a rotation sensor and also detecting information on vehicles and road surfaces with excellent accuracy through the arithmetic processing of the obtained rotational speed and rotational position.SOLUTION: A signal processing unit 3 includes a sensor error correction part 4 for correcting errors included in rotation signals outputted by a rotation sensor 2. This sensor error correction part 4 includes a rotational speed determination part 6 for determining the rotational speed of wheels during running using the input rotation signals, an error correction memory 8, and an error correction processing part 7. The error correction processing part 7 corrects the errors of the rotation signals in accordance with the rotational speed determined by the rotational speed determination part 6, using an error correction pattern stored in the error correction memory 8.SELECTED DRAWING: Figure 1