SYSTEM AND METHOD FOR WIRELESS HEAT DETECTION

• US 20130082839A1
• Filed: 09/30/2011
• Published: 04/04/2013
• Est. Priority Date: 09/30/2011
• Status: Active Grant

• Current Assignee: Tyco Fire & Security GmbH (Johnson Controls International plc)
• Original Assignee: Sensormatic Electronics LLC (Johnson Controls International plc), Simplexgrinnell LP (Johnson Controls International plc)
• Inventors: Farley, Daniel G., Rasband, Paul B.
• Granted Patent: US 8,736,444 B2
• Time in Patent Office: Days
• US Class Current: 340/539.27
• CPC Class Codes: G01K 1/024 for remote indication
• CPC Class Codes: G01K 2215/00 Details concerning sensor power supply
• CPC Class Codes: G01K 3/005 Circuits arrangements for indicating a predetermined temperature fire detection G08B17/00
• CPC Class Codes: G08B 17/06 Electric actuation of the alarm, e.g. using a thermally-operated switch
• CPC Class Codes: G08B 25/10 using wireless transmission systems G08B25/009 takes precedence

Abstract

A system for wireless heat detection is disclosed. The system includes one or more heat sensors that convert sensed heat energy into electrical power for transmitting an alarm signals. A remote system may trigger an alarm based on the received alarm signals. The heat sensors may be placed at discrete locations within an interior of a building to monitor a condition of the infrastructure of the building. The remote system can include a communications module for receiving the signal and transmitting an alarm signal to an associated fire panel. The fire panel may analyze the signal, as well as signals generated from adjacent sensors, to determine whether a fire condition exists within a building. Appropriate notification devices may then be activated based on the determination. Other embodiments are disclosed and claimed.

Claims

1. A heat sensor comprising:

a thermoelectric power component for receiving heat energy and for transforming the heat energy to electric power; and

a transmitting circuit coupled to the thermoelectric power component to receive the electric power therefrom to generate a wireless signal representative of a thermal condition of an object.

2. The heat sensor of claim 1, wherein the transmitting circuit comprises a radio frequency identification (RFID) tag.

3. The heat sensor of claim 2, wherein the transmitting circuit comprises a battery assisted RFID tag.

4. The heat sensor of claim 1, further comprising a diode coupled between the transmitting circuit and the thermoelectric power component.

5. The heat sensor of claim 4, the diode sized to prevent electric energy below a predetermined threshold from being received by the transmitting circuit.

6. The heat sensor of claim 5, the predetermined threshold corresponding to a predetermined temperature of the object.

7. The heat sensor of claim 1, further comprising a fuse coupled between the transmitting circuit and the thermoelectric power component, the fuse sized to prevent electric energy below a predetermined threshold from being received by the transmitting circuit, the predetermined threshold corresponding to a predetermined temperature of the object.

8. The heat sensor of claim 1, the wireless signal including information for identifying a placement location of the sensor.

9. A temperature monitoring system, comprising:

a sensor for converting received heat energy to electric power and for generating a wireless signal representative of a temperature of an object;

a communication module for receiving the wireless signal and for transmitting a corollary signal to a control module;

wherein the control module is configured to determine, from the corollary signal, if the temperature of the object is less than a predetermined alarm value, and to initiate an alarm when the temperature of the object is greater than the predetermined alarm value.

10. The temperature monitoring system of claim 9, wherein the sensor comprises a thermoelectric power component coupled to a transmitting circuit, the thermoelectric power component for receiving heat energy and for transforming the heat energy to electric power, the transmitting circuit to receive the electric power from the thermoelectric power component for generating the wireless signal.

11. The temperature monitoring system of claim 9, wherein the control module is disposed in a fire panel.

12. The temperature monitoring system of claim 9, further comprising a structural failure analysis package associated with the control module, the structural failure analysis package including predetermined failure criteria about a structure in which the temperature monitoring system is installed, wherein the control module is configured initiate a structural failure alarm when the corollary signal satisfies the predetermined failure criteria.

13. The temperature monitoring system of claim 9, wherein the system includes a plurality of said sensors, each of said sensors associated with a discrete location in or on a monitored structure, the system further comprising a memory associated with the control module, the memory including a database identifying the discrete location of each of said sensors.

14. The temperature monitoring system of claim 9, wherein the sensor includes a radio frequency identification (RFID) tag for generating the wireless signal, and the communication module includes a plurality of antenna for receiving the wireless signal.

15. The temperature monitoring system of claim 14, wherein the RFID tag is a battery assisted RFID tag.

16. The temperature monitoring system of claim 9, wherein the communication module includes a wireless module for transmitting the corollary signal to the control module.

17. A method of monitoring an object, comprising:

receiving, at a communication module, a wireless signal from a sensor, the wireless signal representative of a temperature to which the sensor is exposed;

transmitting a corollary signal from the communication module to a control module of a fire panel, the corollary signal representative of the wireless signal received from the sensor;

at the control module, processing the corollary signal received from the communication module to determine if an alarm condition exists at a monitored location associated with the sensor; and

generating an alarm when the control module determines that the alarm condition exists.

18. The method of claim 17, further comprising generating the wireless signal from a battery assisted radio frequency identification (RFID) tag.

19. The method of claim 18, wherein the sensor comprises a thermoelectric power component coupled to a transmitting circuit, the thermoelectric power component for receiving heat energy and for transforming the heat energy to electric power, the transmitting circuit to receive the electric power from the thermoelectric power component for generating the wireless signal.

20. The method of claim 19, further comprising preventing the electric power from being received by the transmitting circuit when the electric power is less than a predetermined threshold.