Door sensor with self-diagnosing function

Details Door sensor with self-diagnosing function Door sensor with self-diagnosing function

1997-04-24

1998-10-27

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

49 31, 340556, 340653, 340661, G08B 2100

Patent

active

058283021

ABSTRACT:
A door panel is actuated when an actuator sensor disposed near the door panel senses an object approaching the door panel. When a safety sensor mounted on the door panel senses an object while the door panel is opening, the door panel is stopped. When a safety sensor mounted on the door panel senses an object while the door panel is closing, the door panel is opened. Each of the sensors includes a light-emitting unit, a light-receiving unit and a control unit, and the sensor can detect for itself failure in any of the light-emitting unit, the light-receiving unit and the control unit.

REFERENCES:
patent: 3742222 (1973-06-01), Endl
patent: 4577437 (1986-03-01), Gionet et al.
patent: 5015840 (1991-05-01), Blau
patent: 5142152 (1992-08-01), Boiucaner
patent: 5410149 (1995-04-01), Winston, Jr. et al.
patent: 5424532 (1995-06-01), Occheto et al.
patent: 5585625 (1996-12-01), Spies
Patent Abstracts of Japan; vol. 095, No. 002, Mar. 31, 1995 & JP 06 311010 A (Nippon Signal Co Ltd: The), 4 Nov. 1994--abstract.

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