Tamper monitoring system and method
First Claim
Patent Images
1. A tamper monitoring system comprising:
- at least one tag including a transmitter, and a receiver; and
a transmission link having first and second ends, the first end being connected to the transmitter and the second end being connected to the receiver, wherein the transmitter is designed to transmit a non-constant signal through the transmission link to the receiver, wherein the receiver is designed to receive a signal from the transmission link and to correlate the received signal with the transmitted signal, and wherein when the received signal does not correlate with the transmitted signal, the active tag transmits a tamper beacon.
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Abstract
A tamper monitoring system includes at least one active tag and a transmission link. The one active tag includes a transmitter and a receiver. The first end of the transmission link is connected to the transmitter and the second end is connected to the receiver. The transmitter is designed to transmit a non-constant signal to the transmission link to the receiver, and the receiver is designed to receive a signal from the transmission link and to correlate the received signal with the transmitted signal. When the received signal does not correlate with the transmitted signal, the active tag transmits a tamper beacon.
75 Citations
26 Claims
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1. A tamper monitoring system comprising:
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at least one tag including a transmitter, and a receiver; and
a transmission link having first and second ends, the first end being connected to the transmitter and the second end being connected to the receiver, wherein the transmitter is designed to transmit a non-constant signal through the transmission link to the receiver, wherein the receiver is designed to receive a signal from the transmission link and to correlate the received signal with the transmitted signal, and wherein when the received signal does not correlate with the transmitted signal, the active tag transmits a tamper beacon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 21, 22, 23, 24, 25, 26)
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19. A tamper monitoring method comprising:
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transmitting an encoded signal from a transmitter of at least one tag through a transmission link to a receiver of the at least one active tag;
receiving a signal from the transmission link with the receiver;
correlating the received signal with the transmitted non-constant signal; and
activating the active tag to transmit a tamper beacon when the received signal does not correlate with the transmitted signal.
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Specification