Device for controlling a windscreen wiping system

Details Device for controlling a windscreen wiping system Device for controlling a windscreen wiping system

1992-06-17

1993-07-13

Ro, Bentsu

Electricity: motive power systems

Periodic, repetitious or successive operations control of...

Variable periods or intervals between controlling operations

318483, 318DIG2, B60S 108

Patent

active

052277054

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.

REFERENCES:
patent: 3947131 (1976-03-01), Karl
patent: 4481450 (1984-11-01), Watanabe et el.
patent: 4588935 (1986-05-01), Kaneiwa et al.
patent: 4595866 (1986-06-01), Fukatsu et al.
patent: 4636643 (1987-01-01), Nakamura et al.
patent: 4798956 (1989-01-01), Hochstein
patent: 5015931 (1991-05-01), Muller

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