Apparatus for detecting movement of heat source

Details Apparatus for detecting movement of heat source Apparatus for detecting movement of heat source

1992-05-26

1994-03-22

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250342, 250349, G01J 508, G01K 707

Patent

active

052967077

ABSTRACT:
In order to detect the movement of a heat source over a widened range by using a reduced number of pyroelectric type infrared sensors, a sensor section includes two infrared detecting means X and Y. The area to be observed by the infrared detecting means X is divided into two zones A and B while the area to be observed by the infrared detecting means Y is divided into two single zones a and b. The single zones A and a are overlapped on each other to form an overlap zone (A, a). The movement of the heat source between the single zone B and the single zone b, between the overlap zone (A, a) and the single zone B and between the overlap zone (A, a) and the single zone b is judged to detect the movement of the heat source over the entire area to be observed by the sensor section. In such a manner, two infrared detecting means can cover three zones to be observed.

REFERENCES:
patent: 4734585 (1988-03-01), Owers
patent: 4831259 (1989-05-01), Meixner et al.
patent: 4912331 (1990-03-01), Owers
patent: 4963749 (1990-10-01), McMaster
patent: 4965453 (1990-10-01), Hoschette et al.
patent: 5134292 (1992-07-01), Segawa et al.

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