| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a photoelectric sensor that avoids a state of mutual interference between a plurality of photoelectric sensors.SOLUTION: A discrimination section 61 discriminates a light reception signal according to a threshold, and an up/down counter 62 counts in an output thereof to determine an incidence state or an interruption state. A pattern decision circuit 9 selects any one from projection patterns #1-#n specifying projection timings during a period of transition from the interruption state to the incidence state, and changes the projection timings in the middle of the transition.</p> |
