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. 06, 2001
Filed:
Dec. 22, 1994
Applicant:
Inventor:
Klaus Glabe, Hannover, DE;
Assignee:
WABCO Standard GmbH, Hannover, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60Q 1/00 ;
U.S. Cl.
CPC ...
B60Q 1/00 ;
Abstract
The present invention provides a sensor-fault detection circuit for use with either an inductive or capacitive-type sensor. The sensor-fault detection circuit conducts a test signal into the sensor circuit for testing such sensor circuit. A time difference measuring device is provided to analyze for correct duration of the transit time of a test signal or test pulse, respectively, passing through the sensor. In the event that the transit time does not fall within a predetermined range tolerance, a fault indication can be activated. The circuit can be used, for example, to test an inductive bar-type sensor to determine the speed of a wheel on a vehicle.