Fire sensing method and fire sensing system using wireless chip for sensing fire

• US 7,333,910 B2
• Filed: 04/18/2006
• Issued: 02/19/2008
• Est. Priority Date: 04/26/2005
• Status: Expired due to Fees

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Ishii, Masato
• Primary Examiner(s): WACHSMAN, HAL D
• Application Number:
  US11/405,516
• Publication Number:
  US 20060238312A1
• Time in Patent Office: 672 Days
• Field of Search: 702/130, 702/136
• US Class Current: 702/130
• 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

The present invention provides a fire sensing system comprising a step of recording positional data of a wireless chip in a memory included in the wireless chip, a step of obtaining temperature data from a temperature sensor included in the wireless chip to be recorded in the memory, a step of taking out the positional data and the temperature data from the memory, and a step of judging whether a fire occurs or not based on an individual identification number, the positional data, and the temperature data of the wireless chip.

Claims

1. A fire sensing method comprising:

recording positional data in a memory included in a wireless chip having a power supply generating circuit, the positional data indicating where the wireless chip is attached;

obtaining temperature data from a temperature sensor included in the wireless chip;

judging whether the temperature data reaches a temperature at which a fire occurs or not based on the temperature data of the wireless chip; and

informing an appropriate contact address when the temperature data reaches the temperature at which the fire occurs,

wherein the wireless chin receives a radio wave including data for indicating the positional data and an instruction for recording the data for indicating the positional data from a reading and writing apparatus.

2. A fire sensing method according to claim 1, wherein the positional data is taken out from the memory by a reading and writing apparatus.

3. A fire sensing method according to claim 1, wherein whether the temperature data reaches the temperature at which the fire occurs or not is judged based on the temperature data by a data processing unit.

4. A fire sensing method according to claim 1, wherein the memory has a structure incapable of being rewritten.

5. A fire sensing method according to claim 1, wherein the radio wave includes an instruction for erasing a temperature data recorded in the memory.

6. A fire sensing method according to claim 1, wherein the memory includes a memory element and a transistor connected to the memory element, and the memory element and the transistor are provided over an insulating substrate.

7. A fire sensing method according to claim 6, wherein the memory element is an element in which a memory material layer is interposed between a pair of electrodes.

8. A fire sensing method comprising:

recording an individual identification number in a memory included in a wireless chip having a power supply generating circuit;

recording positional data in the memory, the positional data indicating where the wireless chip is attached;

obtaining temperature data from a temperature sensor included in the wireless chip;

judging whether the temperature data reaches a temperature at which a fire occurs or not based on the temperature data; and

informing an appropriate contact address when the temperature data reaches the temperature at which the fire occurs,

wherein the wireless chip receives a radio wave including data for indicating the positional data and an instruction for recording the data for indicating the positional data from a reading and writing apparatus.

9. A fire sensing method according to claim 8, wherein the positional data is taken out from the memory by a reading and writing apparatus.

10. A fire sensing method according to claim 8, wherein whether the temperature data reaches the temperature at which the fire occurs or not is judged based on the temperature data by a data processing unit.

11. A fire sensing method according to claim 8, wherein the memory has a structure incapable of being rewritten.

12. A fire sensing method according to claim 8, wherein the radio wave includes an instruction for erasing a temperature data recorded in the memory.

13. A fire sensing method according to claim 8, wherein the memory includes a memory element and a transistor connected to the memory element, and the memory element and the transistor are provided over an insulating substrate.

14. A fire sensing method according to claim 13, wherein the memory element is an element in which a memory material layer is interposed between a pair of electrodes.

15. A fire sensing system comprising:

a wireless chip having a temperature sensor and a power supply generating circuit;

a reading and writing apparatus for recording positional data in a memory included in the wireless chip, the positional data indicating where the wireless chip is attached;

a data processing unit connected to the reading and writing apparatus; and

a central control data processing unit connected through a communication network,

wherein temperature data is recorded in the memory from the temperature sensor included in the wireless chip by the reading and writing apparatus; and

wherein based on the temperature data of the wireless chip from the memory, whether the temperature data reaches a temperature at which a fire occurs or not is judged by the data processing unit or the central control data processihg unit.

16. A fire sensing system according to claim 15, wherein the memory has a structure incapable of being rewritten.

17. A fire sensing system according to claim 15, wherein the memory includes a memory element and a transistor connected to the memory element, and the memory element and the transistor are provided over an insulating substrate.

18. A fire sensing system according to claim 17, wherein the memory element is an element in which a memory material layer is interposed between a pair of electrodes.

19. A fire sensing system comprising:

a plurality of wireless chips each having a temperature sensor and a power supply generating circuit;

a reading and writing apparatus for recording positional data in a memory included in each of the plurality of wireless chips, the positional data indicating where each of the plurality of wireless chips is attached;

a data processing unit connected to the reading and writing apparatus; and

a central control data processing unit connected through a communication network,

wherein an identification number of each of the plurality of wireless chips is recognized and temperature data is recorded in the memory from the temperature sensor included in each of the plurality of wireless chips by the reading and writing apparatus; and

wherein based on the temperature data of the wireless chip from the memory, whether the temperature data reaches a temperature at which a fire occurs or not is judged by the data processing unit or the central control data processing unit.

20. A fire sensing system according to claim 19, wherein the memory has a structure incapable of being rewritten.

21. A fire sensing system according to claim 19, wherein the memory includes a memory element and a transistor connected to the memory element, and the memory element and the transistor are provided over an insulating substrate.

22. A fire sensing system according to claim 21, wherein the memory element is an element in which a memory material layer is interposed between a pair of electrodes.