CIRCUMFERENCE MONITORING SYSTEM FOR WORK VEHICLES

PROBLEM TO BE SOLVED: To secure necessary detection accuracy while suppressing the intensity of laser beams in a circumference monitoring system for working vehicles. SOLUTION: The circumference monitoring system 1 comprises a regression reflector 5 attached to a worker 4 and a circumference monitor...

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Bibliographic Details
Main Authors YAMAKAWA KAZUHIRO, MASUKO SHINJI
Format Patent
LanguageEnglish
Published 03.02.2005
Edition7
Subjects
ALARM SYSTEMS
DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
ORDER TELEGRAPHS
PHYSICS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
TESTING
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Summary:PROBLEM TO BE SOLVED: To secure necessary detection accuracy while suppressing the intensity of laser beams in a circumference monitoring system for working vehicles. SOLUTION: The circumference monitoring system 1 comprises a regression reflector 5 attached to a worker 4 and a circumference monitoring device 3 which projects laser beams in a scanned manner from the working vehicle 2 to a monitor area, receives the laser beams reflected onto the regression reflector 5, and detects the presence of the worker 4 based on the light reception level. The regression reflector 5 is constituted using a cube corner reflector having many cube corner prisms 5a arranged therein, and the circumference monitoring device 3 projects non-diffused laser beams and receives the reflected light substantially coaxially, is provided with a photoelectric sensor 22 of a coaxial regression reflection type which outputs the light reception level, pulse-drives a laser light source of the photoelectric sensor 22 in a predetermined cycle, and detects the presence of the worker 4 based on the light reception pulse. COPYRIGHT: (C)2005,JPO&NCIPI
Bibliography:Application Number: JP20030272979