G - Physics – 01 – V
Patent
G - Physics
01
V
G01V 8/12 (2006.01) G01V 8/20 (2006.01)
Patent
CA 2744768
The invention relates to a method for pulsed operation of a light barrier that can be operated in a normal mode and in a compensation mode, there being run through repeatedly a cycle that comprises the following steps: a) transmitting electromagnetic radiation over a transmission period t transmit by means of a transmission device (2), b) recording measured radiation values I i of the electromagnetic radiation at various measurement times t meas (24) within the measurement period t transmit by means of a detector (4), and c) establishing whether extraneous light is incident on the detector (4) by examining a measured value curve of the recorded measured radiation values I i, the respectively next cycle in the normal mode being run through when no extraneous light is incident, and in the compensation mode when extraneous light is incident, at least one compensation measure being carried out in the compensation mode in order to compensate the influence of extraneous light.
Mock Bernward
Ottleben Bernd
Ottleben Petra
Kirby Eades Gale Baker
Pantron Instruments Gmbh
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