Security Monitoring System
First Claim
1. An RFID transceiver tag for use in a monitoring system for detecting a change in position of the tag relative to an associated RFID tag or the environment surrounding or between the tags, the transceiver tag comprising:
- a detector for detecting a characteristic of a signal transmitted between the transceiver tag and the associated RFID tag and for creating a trigger signal if the detector detects that the characteristic has changed beyond a predetermined extent; and
a transmitter for transmitting a signal to a remote controller on receipt of the trigger signal from the detector.
1 Assignment
0 Petitions
Accused Products
Abstract
An RFID transceiver tag is proposed for use in a monitoring system for detecting a change in position of the tag relative to an associated RFID tag or to the environment surrounding or between the tags. The transceiver tag has a detector for detecting a characteristic of a signal transmitted between the transceiver tag and the associated RFID tag and for creating a trigger signal if the detector detects that the characteristic has changed beyond a predetermined extent; and a transmitter for transmitting a signal to a remote controller on receipt of the trigger signal from the detector.
12 Citations
21 Claims
-
1. An RFID transceiver tag for use in a monitoring system for detecting a change in position of the tag relative to an associated RFID tag or the environment surrounding or between the tags, the transceiver tag comprising:
-
a detector for detecting a characteristic of a signal transmitted between the transceiver tag and the associated RFID tag and for creating a trigger signal if the detector detects that the characteristic has changed beyond a predetermined extent; and a transmitter for transmitting a signal to a remote controller on receipt of the trigger signal from the detector. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A monitoring system for detecting a change in position of an item relative to another item or a change in the environment, the system comprising:
-
a first RFID transceiver tag comprising; a detector for detecting a characteristic of a signal transmitted between the transceiver tag and the associated RFID tag and for creating a trigger signal if the detector detects that the characteristic has changed beyond a predetermined extent; and a transmitter for transmitting a signal to a remote controller on receipt of the trigger signal from the detector; and a second RFID tag arranged to transmit a signal to the first transceiver tag, and wherein the detector of the first RFID transceiver tag detects a characteristic of the signal transmitted by the second RFID tag. - View Dependent Claims (9, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 21)
-
-
15. A monitoring system for detecting a change in position of an item relative to another item, the system comprising:
-
a first RFID transceiver tag for use in the monitoring system for detecting a change in position of the tag relative to an associated RFID tag or the environment surrounding or between the tags, comprising; a detector for detecting a characteristic of a signal transmitted between the transceiver tag and the associated RFID tag and for creating a trigger signal if the detector detects that the characteristic has changed beyond a predetermined extent; and a transmitter for transmitting a signal to a remote controller on receipt of the trigger signal from the detector, wherein the first RFID transceiver tag is arranged to monitor the characteristic of the signal from the associated RFID tag; and a second RFID tag having a detector for detecting a characteristic of the ranging signal transmitted from the first RFID transceiver tag to the second RFID tag and for creating a sensing signal if the detector detects that the characteristic has changed beyond a predetermined extent, and a transmitter for transmitting the sensing signal to the first RFID transceiver tag on receipt of the trigger signal from the detector, and wherein the detector of the first RFID transceiver tag is arranged to create the trigger signal on receipt of the sensing signal.
-
Specification