SYSTEM AND APPARATUS FOR MONITORING AREAS

摘要

An area monitoring system is configured to include a monitoring apparatus and a reflector. The monitoring apparatus includes a time-based detecting unit (i.e., a first detecting unit) that detects an intruder at a scanning angle by measuring a distance to an object based on an elapsed time until reflected light is received, for a first detection area. The monitoring apparatus further includes a light reception amount-based detecting unit (i.e., a second detecting unit) that detects an intruder at a scanning angle by comparing an actual light reception amount at a timing at which reflected light is received when radiated laser light is reflected by a reflector, and a light reception threshold (i.e., a reference light reception amount) set in advance, with a second detection area set farther than the first detection area as an area subjected to detection.

主权项

1. A system for monitoring an area to be monitored, comprising:
a monitoring apparatus that detects an intruding object by radiating laser light at each predetermined scanning angle and scanning the area to be monitored; and a reflector that is provided in the area to be monitored and reflects the laser light radiated from the monitoring apparatus towards the monitoring apparatus, wherein the monitoring apparatus includes
a radiating unit that radiates laser light;a light receiving unit that receives reflected light when the laser light radiated from the radiating unit is reflected by an object;a first detecting unit that detects an intruding object at a scanning angle by measuring a distance to an object based on an elapsed time from when the laser light is radiated until the reflected light is received, for a first detection area set near the monitoring apparatus than a second detection area is; anda second detecting unit that detects, in the second detection area, the intruding object at a scanning angle by comparing a light reception amount at a timing at which reflected light is received when the radiated laser light is reflected by the reflector, and a reference light reception amount set in advance to determine whether or not an object is present between the monitoring apparatus and the reflector, the second detection area that being set farther than the first detection area is and being provided with the reflector as an area subjected to detection.