G - Physics – 08 – B
Patent
G - Physics
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B
325/44
G08B 1/08 (2006.01) G08B 1/00 (2006.01) G08B 13/14 (2006.01) G08B 21/02 (2006.01) H04B 17/00 (2006.01) H04Q 1/30 (2006.01) H04Q 7/00 (2006.01)
Patent
CA 1287114
-38- REMOTE MONITORING AND ALARM SYSTEM ABSTRACT A remote monitoring and alarm system has an FM radio link between a transmitter carried by a person or object being monitored and a receiver to which alarm signals are transmitted from the remote transmitter. Digitally-encoded FM signals are produced at the transmitter at pre-set transmission intervals in the form of multiple digital words detected by the receiver. The receiver is a constant listening device which produces an alarm immediately if at least one of the coded words is not received during any transmission interval. The multiple words serve as redundant words during each transmission interval to minimize false alarms at the receiver due to interference. The multiple coded words are transmitted at minimum time intervals pre- set to maximize the number of coded pulses during each transmission interval while spacing the coded words to permit maximum allowable power transmission. The receiver can monitor two transmitters simultaneously operating at the same carrier frequency by adjusting the coded words so they occur at different periods within the same trans- mission interval to prevent the possibility of total overlap. Emergency conditions monitored include out-of- range, anti-tampering, panic alert, immersion and breathing rate, as well as other selected emergency or status conditions.
535350
Corwin Edward
Vories Dennis L.
Corwin Edward
Fetherstonhaugh & Co.
Inc. Nutter (f.b.) Enterprises
Kare Electronics Inc.
Vories Dennis L.
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