Moving object detector and moving object detecting system

Details Moving object detector and moving object detecting system Moving object detector and moving object detecting system

1991-08-12

1992-07-28

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250353, 250349, G01J 512

Patent

active

051342928

ABSTRACT:
Infrared rays radiated from a moving object is converged into a plurality of infrared ray detectors by optical system. Detecting area is instituted by the optical system so as to put the infrared rays into a plurality of the infrared ray detectors with time difference therebetween. Signal processing unit produces a detecting signal when there is a predetermined time difference between signals produced by a plurality of the infrared ray detectors. It is possible to avoid wrong operation which is caused by popcorn noise and a differential noise having a bit of time difference caused by temperature gradient in space. Forming a curved imaginary boundary line, a plurality of detecting zones are disposed at out side and inside of the curved imaginary boundary line to detect the object invading from any direction.

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patent: 4873469 (1989-10-01), Young et al.
patent: 4928012 (1990-05-01), Lorenz

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