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:
Dec. 18, 2001
Filed:
Feb. 02, 2000
Norbert Hog, Buehl, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
An apparatus and a method for operating an optoelectronic rain sensor for detecting the wetting of a window (,) with moisture for wetting-dependent triggering of a system, in particular a windshield wiper system for motor vehicles, is proposed in which the component of the ambient beam (,) of the sensor signal (,) in a first interval is virtually eliminated and therefore need no longer be taken into account in the ensuing detection of the sensor signal (,) in a second interval relevant to triggering of the windshield wiper system. The apparatus includes first means (,), which in the first interval detect the sensor signal (,) and ascertain an interfering light signal (,) corresponding to the ambient beam (,), the latter signal being delivered to a regulator (,), which as a function of the interfering light signal (,) regulates compensation means (,) disposed in the current circuit of the receiver (,), and second means (,), which in the second interval, directly following the first, detect the sensor signal (,) and ascertain a useful light signal (,) corresponding substantially to the transmitter beam (,).