Vibration noise suppressive rain sensor for a wiper control syst

Details Vibration noise suppressive rain sensor for a wiper control syst Vibration noise suppressive rain sensor for a wiper control syst

1984-01-26

1986-07-29

Rowland, James L.

Communications: electrical

Selective

Having indication or alarm

1525002, 15250C, 73170R, 307 10R, 310324, 310345, 318DIG2, 340602, B60Q 100

Patent

active

046033165

ABSTRACT:
A wiper control system controls an automotive wiper in accordance with rain conditions. Rain conditions are detected by means of a rain sensor which has a vibrator adapted to vibrate at an amplitude corresponding to rain conditions. The vibrator is adapted to produce a sensor signal having an amplitude corresponding to its vibration. The vibrator vibrates at a resonant frequency outside of the audible frequency range and has adequate sensitivity for detecting rain conditions.

REFERENCES:
patent: 3141330 (1964-07-01), Murray et al.
patent: 3264410 (1966-08-01), Schoenbaum
patent: 3555289 (1971-01-01), Sobkow
patent: 4010383 (1977-03-01), Grassmann
patent: 4079362 (1978-03-01), Grimm et al.
patent: 4527105 (1985-07-01), Shiraishi
patent: 4542325 (1985-09-01), Kobayashi et al.

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