Telesurveillance installation and operating process thereof

Details Telesurveillance installation and operating process thereof Telesurveillance installation and operating process thereof

2006-03-28

2006-03-28

Wu, Daniel (Department: 2632)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S552000, C340S565000, C340S568100, C340S572200, C340S572600, C340S573400, C340S547000

Reexamination Certificate

active

07019647

ABSTRACT:
An installation includes at least one magnetic field source, measuring equipment fixed onto a freely movable object whose motion is to be detected, and control equipment. The measuring equipment includes a magnetometer able to measure the magnetic field it is surrounded by, a comparator able to test the magnetic field value against a threshold value, and a transmitter for transmitting a signal representing the result of this test. The control equipment receives this signal and derives therefrom the object displacement and/or its proximity to the source.

REFERENCES:
patent: 5661459 (1997-08-01), Belcher
patent: 6057756 (2000-05-01), Engellenner
patent: 6392547 (2002-05-01), Stewart et al.
patent: 2002/0077710 (2002-06-01), Harrington et al.
patent: 2003/0076229 (2003-04-01), Blanpain et al.
patent: 0 999 531 (2000-05-01), None
patent: 2 586 302 (1987-02-01), None
patent: WO 99/03060 (1999-01-01), None

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