Intrusion or movement detector

Details Intrusion or movement detector Intrusion or movement detector

G - Physics

08

B

343/19, 340/124.

G08B 13/24 (2006.01) G01V 3/10 (2006.01)

Patent

CA 1093655

ABSTRACT An intrusion or movement detector including an oscillator or other means for generating a radio signal generating means for transmitting a radio signal into an area to be surveyed by said detector, said antenna inhibiting a variable radiation resistance relative to the position and movement of objects in the area to be surveyed resulting in a variable loading on said generator when in use, means for monitoring said variable loading and activating a signal or alarm means when said variations in loading reach a predetermined threshold level to indicate an intrusion or movement in the area surveyed.

270056

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