Fire sensing method and fire sensing system

• US 20060238312A1
• Filed: 04/18/2006
• Published: 10/26/2006
• Est. Priority Date: 04/26/2005
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Ishii, Masato
• Granted Patent: US 7,333,910 B2
• Time in Patent Office: Days
• US Class Current: 340/286.50
• 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

Conventional fire sensing system has required to determine an installation site for a fire sensing device in advance when a building or vehicle has been designed; that restricts the design of the building or vehicle. 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 to be recorded in the memory;

taking out the positional data and the temperature data from the memory; and

judging whether a fire occurs or not based on an individual identification number, the positional data, and the temperature data of the wireless chip.

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

3. A fire sensing method according to claim 1, wherein whether a fire occurs or not is judged based on the individual identification number, the positional data, and 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. Afire sensing method according to claim 1, wherein the wireless chip is attached to a building, and to the attached wireless chip, a radio wave is transmitted in order to record positional data indicating where the wireless chip is attached.

6. A fire sensing method according to claim 5, wherein the radio wave for recording the positional data includes data for indicating positional data and an instruction for recording data for indicating positional data.

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

8. 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.

9. A fire sensing method according to claim 8, wherein the memory element is an element in which a memory material layer is interposed between a pair of electrodes.

10. 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 to be recorded in the memory;

taking out the positional data and the temperature data from the memory; and

judging whether a fire occurs or not based on the individual identification number, the positional data, and the temperature data.

11. A fire sensing method according to claim 10, wherein the positional data and the temperature data are taken out from the memory by a reading and writing apparatus.

12. A fire sensing method according to claim 10, wherein whether a fire occurs or not is judged based on the individual identification number, the positional data, and the temperature data by a data processing unit.

13. A fire sensing method according to claim 10, wherein the memory has a structure incapable of being rewritten.

14. A fire sensing method according to claim 10, wherein the wireless chip is attached to a building, and to the attached wireless chip, a radio wave is transmitted in order to record positional data indicating where the wireless chip is attached.

15. A fire sensing method according to claim 14, wherein the radio wave for recording the positional data includes data for indicating positional data and an instruction for recording data for indicating positional data.

16. A fire sensing method according to claim 14, wherein the radio wave for recording the positional data includes an instruction for erasing the temperature data recorded in the memory.

17. A fire sensing method according to claim 10, 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 method 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 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

based on the positional data, the temperature data, and an individual identification number of the wireless chip from the memory, whether 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.

23. 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 wireless chips, the positional data indicating where the each of the 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 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

based on the positional data, the temperature data, and the individual identification number of the wireless chip from the memory, whether a fire occurs or not is judged by the data processing unit or the central control data processing unit.

24. A fire sensing system according to claim 23, wherein the memory has a structure incapable of being rewritten.

25. A fire sensing system according to claim 23, 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.

26. A fire sensing system according to claim 25, wherein the memory element is an element in which a memory material layer is interposed between a pair of electrodes.