Method for operating a circuit arrangement

Details Method for operating a circuit arrangement Method for operating a circuit arrangement

1991-06-13

1992-08-25

Church, Craig E.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250214B, 250221, G01J 132

Patent

active

051421348

ABSTRACT:
A circuit arrangement for a sanitary fitting controlled in a non-contacting manner comprises a transmitter (3) as well as a receiver (4), at which radiation emitted by the transmitter (3) arrives after reflection on an object (7). In an initialization process, which takes place for the first time after the initial installation, thereafter at greater regular time intervals, the capacity of the transmitter (3) is increased until the reflection on a stationary object (7) in the monitoring range has the result that the evaluation circuit (5) following the receiver (4) is activated. Now the capacity of the transmitter (3) is once more reduced somewhat; the circuit arrangement changes to normal operation. It now has its optimum sensitivity, at which stationary objects (7) no longer cause faulty actuations, but the greatest possible monitoring range is provided for movable objects to be monitored.

REFERENCES:
patent: 4207466 (1980-06-01), Drage et al.
patent: 4915347 (1990-04-01), Iqbal et al.

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