TWO-DIMENSIONAL SCANNING TYPE OPTICAL RADAR SENSOR

摘要

PROBLEM TO BE SOLVED: To provide a two-dimensional scanning type optical radar sensor capable of monitoring an object while confirming normal operation. SOLUTION: A scanning mirror 13 is rockingly driven around axes 13a and 13b by driving circuits 14 and 15, and a light beam from a light emitting element 11 is two-dimensionally scanned on the range of a scanning area A including a monitoring area B. A normal operation confirming means 19 confirms whether or not the reflected light from reflectors m1 to m4 for inspection are being received on the basis of scanning information from the driving circuits 14 and 15 and received light output R1 obtained via a light receiving element 16 and a light receiving circuit 17. A nonexistence judging means 18 judges the existence of the object in the monitoring area B on the basis of the received light output R1. When S=1 for indicating the nonexistence of the object is generated from the nonexistence judging means 18 and N=1 for indicating the normal operation is generated from the normal operation confirming means 19, Z=1 for indicating safety is generated from an AND gate 20.