Sliding door sensor

Details Sliding door sensor Sliding door sensor

1991-01-02

1992-08-25

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250221, 250349, 49 25, 340545, E05F 1520

Patent

active

051421526

ABSTRACT:
A sliding door sensor employs two arrays of IR emitters which are pulsed to provide an approach detection zone and a threshold detection zone. Radiation reflected from the detection zones is converted to signals which are processed in microprocessors. The sensor periodically automatically adjusts for changes in background. Both presence and motion detection is provided. The sensor also detects dark objects.

REFERENCES:
patent: 4733081 (1988-03-01), Mizukami
patent: 4823010 (1989-04-01), Kornbrekke et al.
patent: 4967083 (1990-10-01), Kornbrekke et al.

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