Redundant security system
First Claim
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1. A redundant security sensor, comprising:
- a photoelectric cell;
a security switch;
a passive identification tag to transmit a binary value modified according to a condition of said security switch; and
a processor to monitor for a passive identification tag radio frequency field from a remote passive identification tag reader, and if said passive identification tag radio frequency field is not detected, to trigger a backup wireless transmitter, distinct from said passive identification tag, to wirelessly transmit said stored binary value with power generated from said photoelectric cell.
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Abstract
A redundant security system relies on a Radio Frequency Identification (RFID) tag to convey security sensor data. If the RFID tag is unable to convey security sensor data, a backup photoelectric cell powered transmitter is activated to transmit security sensor data to a monitoring station. Alternately, a security safe is outfitted with a RFID tag based security sensor. The RFID tag allows remote monitoring of at least one of an opened/closed condition and a locked/unlocked condition of a door of the security safe.
25 Citations
13 Claims
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1. A redundant security sensor, comprising:
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a photoelectric cell; a security switch; a passive identification tag to transmit a binary value modified according to a condition of said security switch; and a processor to monitor for a passive identification tag radio frequency field from a remote passive identification tag reader, and if said passive identification tag radio frequency field is not detected, to trigger a backup wireless transmitter, distinct from said passive identification tag, to wirelessly transmit said stored binary value with power generated from said photoelectric cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification