Door/window contact system

• US 8,988,225 B2
• Filed: 12/04/2012
• Issued: 03/24/2015
• Est. Priority Date: 12/04/2012
• Status: Active Grant

• Current Assignee: Ademco Inc. (Resideo Technologies, Inc.)
• Original Assignee: Honeywell International Inc.
• Inventors: Smith, Richard Alan
• Primary Examiner(s): TRIEU, VAN THANH
• Application Number:
  US13/693,903
• Publication Number:
  US 20140152438A1
• Time in Patent Office: 840 Days
• Field of Search: 340/572.1, 340/572.4, 340/568.1, 340/545.1, 340/545.7, 340/5.64, 340/10.1, 340/541
• US Class Current: 340/572.4
• CPC Class Codes: G06K 19/0725 the arrangement being a circuit for emulating a plurality of record carriers, e.g. a single RFID tag capable of representing itself to a reader as a cloud of RFID tags
• CPC Class Codes: G06K 19/07758 arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag
• CPC Class Codes: G08B 13/08 by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
• CPC Class Codes: G08B 13/19608 Tracking movement of a target, e.g. by detecting an object predefined as a target, using target direction and or velocity to predict its new position
• CPC Class Codes: G08B 13/1961 Movement detection not involving frame subtraction, e.g. motion detection on the basis of luminance changes in the image
• CPC Class Codes: G08B 23/00 Alarms responsive to unspecified undesired or abnormal conditions
• CPC Class Codes: G08B 25/10 using wireless transmission systems G08B25/009 takes precedence
• CPC Class Codes: G08B 29/046 prevention of tampering with detection circuits

Abstract

A window or door position detector includes an RFID tag attachable to the window or door, and a transceiver. The transceiver emits an activating signal to the tag. The tag in turn responds with an identifying RF signal indicative of a predetermined position of the window or door. The detector includes a transceiver which can communicate with both the tag and a displaced monitoring system control panel.

Claims

1. A position detector comprising:

a first element having an attachment feature, the first element emitting a unique, identifying radio frequency signal in response to a received, enabling radio frequency signal wherein the first element further comprises a standard off the shelf RFID tag and protocol; and

a second element with a transmitter that emits the enabling radio frequency signal, and that emits a reporting radio frequency signal, wherein both signals are emitted by the same transmitter at the same frequency.

2. A detector as in claim 1 where the first element includes an RFID-type tag which transmits the identifying radio frequency signal upon receipt of the enabling radio frequency signal.

3. A detector as in claim 2 where the tag is one of an active tag, or a passive tag.

4. A detector as in claim 1 where the attachment feature of the first element includes at least one of an adhesive, or a mechanical fastener.

5. A detector as in claim 4 where the first element includes a housing which carries the attachment feature.

6. A detector as in claim 1 wherein a housing of the first element is one of surface mountable, or recess mountable.

7. An apparatus which includes at least one wireless position detector as in claim 1 and which includes a monitoring system control unit with a receiver which receives the reporting signal, and, emits an alarm indicating output indicative of the reporting signal.

8. An apparatus as in claim 7 where the transmitter wirelessly communicates with the monitoring system control unit with a signal having a frequency substantially identical to the frequency of the enabling signal emitted by the detector.

9. An apparatus as in claim 7 where the position detector includes a common transmitter to emit an activating signal and a reporting signal.

10. A monitoring system comprising:

a plurality of wireless condition detectors wherein at least one detector responds to displacement of a member from a first position to a second displaced position, and includes a transceiver which emits both a wireless activation signal to an RF responsive position sensor, and a wireless alarm reporting signal where the wireless activation signal and wireless alarm reporting signal are transmitted at the same frequency and where the RF responsive position sensor further comprises a standard off the shelf RFID tag and protocol; and

a control unit in wireless communication with members of the plurality wherein the unit includes a receiver which receives the reporting signal.

11. A monitoring system as in claim 10 where the transceiver of the at least one detector emits an enabling radio frequency signal, and the detector'"'"'s reporting signal, wherein both signals are emitted at substantially the same frequency.

12. A monitoring system as in claim 10 which includes in the plurality at least one or more of, glass break detectors, motion detectors, fire detectors, and gas detectors.

13. A monitoring system as in claim 10 where the at least one detector includes an RFID-type tag mountable on the one member.

14. A monitoring system as in claim 10 where the at least one detector transmits at a frequency in a band between 300 MHz and 930 MHz.