MULTIPLE OPTICAL AXIS PHOTOELECTRIC SENSOR, FLOOD LIGHT DEVICE, FLOOD LIGHT ELEMENT UNIT FLOOD LIGHT CONTROL UNIT, LIGHT RECEIVING DEVICE, LIGHT RECEIVING ELEMENT UNIT, LIGHT RECEIVING CONTROL UNIT AND METHOD FOR SETTING NUMBER OF FLOOD LIGHT AND RECEIVING ELEMENTS TO BE DRIVEN

摘要

PROBLEM TO BE SOLVED: To provide a multiple optical axis photoelectric sensor miniaturized and capable of automatically setting the number of flood lights and receiving elements to be driven. SOLUTION: A multiple optical axis photoelectric sensor 1 is composed of a flood light device 2 provided with plural LED 7a-7h as flood light elements and a light receiving device 21 provided with plural photodiodes 26a-26h as light receiving elements. In the flood light device 2, the LED 7a-7h are successively emitted and on the basis of counting of flood light signals outputted from a current detecting circuit 8 as a flood light detecting means, the number of LED to be driven is set. In the flood light device 2, the LED 7a-7h are emitted just for the number to be driven and in such a case, on the basis of counting of light receiving signals received by photodiodes 26a-26h, the number of photodiodes to be driven is set.