The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 01, 1977
Filed:
Dec. 09, 1976
Wolfgang Gudat, Hannover, DT;
WABCO Westinghouse GmbH, Hannover, DT;
Abstract
In a circuit for producing a digital wheel speed signal from the duration of a half cycle alternation of the sinusoidal waveform produced by a wheel sensor, there is provided a control unit which operates a first counter until it reaches a count corresponding to the duration of the half cycle alternation of the sinusoidal waveform and in response to this occurrence effects operation of a second counter until the first counter reaches a predetermined final stage. A signal representing the duration of a half cycle alternation, which is inversely proportional to the angular wheel velocity is thus converted by the control unit so as to produce a wheel speed signal that is directly proportional to the angular wheel velocity. According to the present invention, the pulse frequency supplied to at least one of the first and second counters is adjusted according to the stage of the counter so as to change exponentially and thereby provide for faster generation of the wheel speed signal.