Procedure and apparatus for detecting objects moving at varying

Details Procedure and apparatus for detecting objects moving at varying Procedure and apparatus for detecting objects moving at varying

1988-12-15

1991-12-17

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

2502221, 340555, G01V 904

Patent

active

050737066

ABSTRACT:
The invention relates to a procedure and apparatus for detecting and counting objects having velocities and that are in a certain area, wherein at least one passive detector detects background radiation, the signal obtained from said detector is amplified to produce a second signal independent of the distance and size of the object. The frequency content of this second signal is analyzed to chart the movements of the objects. To produce an inexpensive and simple detector, detection of movement of each object and generation of a signal with a frequency content are achieved by dividing the change in background radiation caused by each object into a succession of flashes hitting a surface capable of detecting the background radiation, so that the detector provides an electrical signal the frequency of which is characteristic of the velocity of each object and changes in proportion to the change in the velocity of each object.

REFERENCES:
patent: 3631434 (1971-12-01), Schwartz
patent: 3703718 (1972-11-01), Berman
patent: 3760399 (1973-09-01), Schwarz
patent: 3781842 (1973-12-01), Campman
patent: 4068222 (1978-01-01), Treviranus
patent: 4179691 (1979-12-01), Keller
patent: 4207466 (1980-06-01), Drage et al.
patent: 4364030 (1982-12-01), Rossin
patent: 4403142 (1983-09-01), Kondo
patent: 4433328 (1984-02-01), Saphir et al.
patent: 4520343 (1985-05-01), Koh et al.
patent: 4612442 (1986-09-01), Toshimichi
patent: 4645919 (1987-02-01), McCaleb
patent: 4713545 (1987-12-01), Norrgren et al.

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