Method and apparatus for proximity activated RFID system

• US 7,859,404 B2
• Filed: 06/18/2008
• Issued: 12/28/2010
• Est. Priority Date: 03/25/2008
• Status: Active Grant

• Current Assignee: Johnson Controls Tyco IP Holdings LLP (Johnson Controls International plc)
• Original Assignee: Tyco Safety Products Canada Limited (Johnson Controls International plc)
• Inventors: Chul Lee, Steven Seung, Choy, Jake
• Primary Examiner(s): Nguyen; Tai T
• Application Number:
  US12/141,574
• Publication Number:
  US 20090243837A1
• Time in Patent Office: 923 Days
• Field of Search: 340/539.19, 340/539.23, 340/5.61, 340/426.6, 340/501, 340/506, 340/531, 340/545, 340/1, 340/545.7, 340/572.1, 340/572.7, 340/572.8, 340/693.3
• US Class Current: 340/539.19
• CPC Class Codes: G08B 25/008 Alarm setting and unsetting, i.e. arming or disarming of the security system
• CPC Class Codes: G08B 25/10 using wireless transmission systems G08B25/009 takes precedence

Abstract

A security system comprises a control panel configured to control devices in a security system, a keypad and an arm/disarm device. The keypad is in communication with the control panel and comprises a transceiver configured to communicate with the control panel and a magnet having a magnetic field extending within a predetermined proximity of the keypad. The arm/disarm device comprises a transmitter and a switch configured to activate the transmitter when the switch is in the magnetic field. The transmitter is further configured to transmit a low power signal when activated. The transceiver is further configured to receive the low power signal and transmit a message to the control panel. The control panel is further configured to change an Armed/Disarmed Mode of the system based on the message.

Claims

1. A security system, comprising:

a control panel configured to control devices in a security system;

a keypad in communication with the control panel, the keypad comprising;

a transceiver;

a passive infrared (PIR) sensor configured to detect temperature within a predetermined proximity of the PIR sensor, the transceiver transmitting an RF signal when the PIR sensor detects a minimum temperature change; and

an arm/disarm device configured to receive the RF signal from the transceiver, the arm/disarm device comprising a transmitter configured to transmit a low power RF device packet to the transceiver, the low power RF device packet comprising at least one identifier for identifying the arm/disarm device, the, keypad further configured to transmit a message to the control panel based on the low power RF device packet, the control panel further configured to determine one of an Armed Mode and Disarmed Mode for the system based on the message.

2. The security system of claim 1, wherein the transceiver is a 433/868 MHz transceiver.

3. The security system of claim 1, wherein the transceiver further comprises:

a keypad transceiver; and

an RFID reader, wherein the keypad transceiver is configured to communicate with the control panel and the RFID reader is configured to transmit the RF signal when the PIR sensor detects the minimum temperature change.

4. The security system of claim 1, wherein the transceiver further comprises:

a keypad transceiver configured to communicate with the control panel; and

an RFID reader configured to transmit the RF signal when the PIR sensor detects the minimum temperature change, wherein the RFID reader is further configured to be dormant prior to transmitting the RF signal, the RFID reader further configured to detect the low power RF device packet.

5. The security system of claim 1, wherein the arm/disarm device further comprises a battery configured to power the transmitter, wherein the transmitter is further configured to be in an off mode prior to receiving the RF signal and in an activated mode for a period of time after receiving the RF signal.

6. The security system of claim 1, wherein the transceiver is configured to transmit the RF signal at a low power to be detectable within the predetermined proximity, wherein the predetermined proximity is up to three inches from the PIR sensor.

7. The security system of claim 1, wherein the RF signal is a burst of RF energy consuming current within a range of one mA to 7 mA.

8. The security system of claim 1, wherein the arm/disarm device is a passive RFID tag.

9. The, security system of claim 1, wherein the transceiver is further configured to operate in a periodic polling mode.