Title:
PASSIVE INFRARED BURGLAR SENSOR EQUIPPED WITH VISUAL FIELD INTERRUPTION MONITOR MECHANISM
Document Type and Number:
WIPO Patent Application WO/1988/003301
Kind Code:
A1
Abstract:
In a passive sensor of the type in which infrared energy emitted by an object inside a predetermined monitor field is detected by an infrared sensing element (6) and an alarm is sounded in response to the detection signal, the present invention discloses a passive type infrared burglar sensor characterized in that a man or an object coming close to a sensor main body is detected by an infrared sensor (7) which exhibits its detection function independently of the object detection function inside the monitor field described above, and any vision interference with the object detection function inside the monitor field is monitored.
Inventors:
MATSUDA KAZUHISA (JP)
Application Number:
PCT/JP1987/000844
Publication Date:
May 05, 1988
Filing Date:
October 30, 1987
Export Citation:
Assignee:
TAKENAKA ENG CO LTD (JP)
International Classes:
G08B13/193; G08B29/04; (IPC1-7): G08B13/18
Foreign References:
| JPS57198691U | 1982-12-16 | |||
| JPS55146583U | 1980-10-21 |
Other References:
See also references of EP 0289621A4
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