Method and apparatus for adapting the sensitivity of a sensor sy

Details Method and apparatus for adapting the sensitivity of a sensor sy Method and apparatus for adapting the sensitivity of a sensor sy

1990-08-01

1991-05-21

Shoop, Jr., William M.

Electricity: motive power systems

Periodic, repetitious or successive operations control of...

318DIG2, 15250C, H02P 700

Patent

active

050178474

ABSTRACT:
A method and device for adapting the sensitivity of a sensor system for the detection of precipitations during the control of wiping intervals of a screenwiper drive of a motor vehicle as a function of the kinetic energy of striking precipitations. A pressure-sensitive sensor of a sensor system detects striking precipitations, the detections of striking precipitations are converted into electrical output signals, and the output signals are transmitted via a transmission path to an amplifier with an amplification factor for activating a wiper-motor control circuit. The electrical properties of the transmission path are varied as a function of ambient temperature such that the responsiveness of the sensor system is increased with decreasing temperatures, so that a reliable response even to snowflakes of small mass are achieved.

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SAE Technical Paper Sries 851637--"An Intermittent Wiper System with a Raindrop Sensor"--Passenger Car Meeting, Dearborn, Michigan, Sep. 23-26, 1985.

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