Electricity: motive power systems – Periodic – repetitious or successive operations control of... – Variable periods or intervals between controlling operations
Patent
1992-09-30
1993-10-12
Ro, Bentsu
Electricity: motive power systems
Periodic, repetitious or successive operations control of...
Variable periods or intervals between controlling operations
318DIG2, B60S 108
Patent
active
052528987
ABSTRACT:
The method of operating a windshield wiper intermittently requires an apparatus including a rain sensor (12), which generates a signal (S) depending on an amount of rain on the windshield, and a signal processing device (13), e.g.a microprocessor with internal A/D and D/A converters, connected to the sensor (12) to receive the signal (S) and, a control unit connected to the signal processing device (13), and, advantageously, a device for measuring a wiping process duration (T) and inputting the duration to the microprocessor and a drive for the windshield wiper connected to the signal processing device (13). According to the method, the windshield wiper is operated by the signal processing device at least partially according to the signals (S) from the sensor so that the time interval (I) between successive current wiping processes, depends, in part, on a duration (T.sub.-1, T.sub.-2, . . . T.sub.-n) of at least one past wiping process (W.sub.-1, W.sub.-2, . . . W.sub.-n); in part, on a number of signals (S) received from the sensor (12) in a certain time interval F set in the signal processing device; in part, on at least one of two intervals (I.sub.-1, I.sub.-2, . . . I.sub.-n) between past wiping processes (W); and also depends, in part, on at least one time interval (D.sub.0,D.sub.-1, . . . D.sub.-n) between successive ones of the signals (S.sub.0,S.sub.-1 ;S.sub.-1,S.sub.-2, . . . S.sub.-n,S.sub.-n-1).
REFERENCES:
patent: 4527105 (1985-07-01), Shiraishi
patent: 4733142 (1988-03-01), Bicknell
patent: 4740735 (1988-04-01), Hayashi
patent: 4867561 (1989-09-01), Fujii et al.
patent: 5023467 (1991-06-01), Uhl
Mangler Juergen
Nolting Peter
Ro Bentsu
Robert & Bosch GmbH
Striker Michael J.
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