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:
Jul. 13, 1993
Filed:
Jun. 17, 1992
Norbert Bendicks, Hemer, DE;
Jurgen Levers, Bochum, DE;
Leopold Kostal GmbH & Co. KG, Ludenscheid, DE;
Abstract
A device is provided for controlling a windscreen wiping system, which mainly comprises a control stage, a clock generator unit comprising a switch and a clock-pulse generator, an I/V converter, a phase-selective rectifier and an amplifier with a low-pass filter as well as an optoelectronic apparatus having a plurality of beam transmitters, a beam guide element and a plurality of beam receivers. Such a device is intended to solve the technical problem of effecting automatic adjustment of the control system even under very widely varying measuring conditions determined in particular by the various damping factors of different types of windscreen. This is achieved in that the circuit arrangement of the windscreen wiping system has a control stage provided with a basic setting value, which is substantially determined by the optoelectronic apparatus when the screen is optimally clean and represents the quasi static conditions of the components provided for detecting the coating present on the screen, and in that the basic setting value is stored in a non-volatile memory of the circuit arrangement and is used as the starting value for all subsequent startups of the windscreen wiping system.