| 摘要 |
PCT No. PCT/EP96/01975 Sec. 371 Date Jan. 29, 1997 Sec. 102(e) Date Jan. 29, 1997 PCT Filed May 9, 1996 PCT Pub. No. WO96/38742 PCT Pub. Date Dec. 5, 1996A device and a method for eliminating interference signals in a light barrier. The device includes, having a transmitter, a receiver and an evaluation unit that is connected to the receiver. The transmitter periodically emits light pulse trains with a defined pulse length TP and a defined period length Ts. In the evaluation unit, the received signals present at the receiver are evaluated only during activation intervals that are limited in time. The length of the activation intervals depends on whether light pulses are recorded during these activation intervals.
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