System for detecting the presence of objects

摘要

System composed of a device 1 for emitting electromagnetic radiation and a device 2 for receiving said electromagnetic radiation, in which the emitter device 1 emits a series of electromagnetic-radiation beams 14 which run over a plane 3, which overlap at least partially, and which are emitted successively in the form of pulses, which strike the receiver device 2 which sends the information on the signals received at a given instant to a control unit 8 which compares said information on the signals received at a given instant with the information on the signals received in the absence of objects 4 which interfere with said beams 14 of electromagnetic waves and analyses said comparison in order to determine whether there is or is not an object 4 present in said detection plane 3. <IMAGE>