JP2006004027A - Temperature detecting ic tag, and system for detecting temperature - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temperature detection IC tag having a temperature detecting function for arbitrarily performing additional installation or changing arrangement without necessity to laying wiring for data transmission, and to provide a temperature detecting system thereof. <P>SOLUTION: The temperature detection IC tag comprises an arbitrary number of antennas 14 which are fixed at arbitrary positions in a temperature monitor place 12, so as to perform fusing with heat when a fire occurs; a storage device 20 for recording identification information 18 to discriminate a self body from others; and communication equipment 28 for transmitting a response signal 22, including the identification information 18 stored in the storage device 20, to a monitor device 24 by exciting the antennas 14 at the timing of receiving an inquiry signal 26 which is originated from the monitor device 24 or at a prescribed timing. Information for performing discrimination from another IC tag 10 is recorded in each IC tag 10, so as to obtain the response of the identification information 18 which differs by each attachment place. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a temperature detection IC tag and a temperature detection system used for applications such as a fire alarm and various temperature monitoring systems.

Fire detectors obligated to be installed in buildings under the Fire Service Act sense smoke and / or heat. There are two types of temperature sensors for heat sensing, a differential type and a constant temperature type. The differential type temperature sensor detects a rapid temperature rise, and the constant temperature type temperature sensor detects the state when it reaches a certain temperature. A bimetal electric switch is used for the heat sensitive part of the constant temperature spot type heat sensor. Bimetal is set to about 75 degrees Celsius, and the switch is turned on when the set temperature is detected. The constant temperature type sensing line type heat sensor detects the state when a long sensing line reaches a certain temperature or more. This sensing wire is a twisted pair of insulated wires, and when the temperature rises, the insulation coating is peeled off and the pair of conductors are short-circuited like a switch (see Patent Document 1).
JP 2001-283343 A

Here, the conventional temperature detection system has the following problems to be solved.
Any of the conventional temperature sensors as described above has a complicated structure and requires wiring for data transmission. In addition, if the number of detectors is increased, there is a problem that installation work takes time and a large amount of money.
The present invention has been made paying attention to the above points, and there is no need to lay out data transmission wiring, and a temperature detection IC tag having a temperature detection function that can be arbitrarily added or changed in arrangement. And to provide a temperature sensing system.

In each embodiment of the present invention, the above-described problems are solved by the following configurations.
<Configuration 1>
An arbitrary number of temperature monitoring locations can be attached to any number of antennas that lose the radio wave emission function at a predetermined temperature, a storage device that records identification information that can distinguish itself and others, and the storage device A communication device that transmits the response signal including the stored identification information to the monitoring device by exciting the antenna at a timing of receiving an inquiry signal transmitted from the monitoring device or at a predetermined timing; An IC tag for temperature detection, comprising:

  In each storage device of the plurality of IC tags, identification information that can be distinguished from other IC tags is recorded for each IC tag. This IC tag is attached to the ceiling of a building, for example, in the same manner as a fire alarm. A communication line for data communication is not necessary. A power supply is also unnecessary. You can respond by charging with the received power. If information that can be distinguished from other IC tags is recorded in each IC tag, a response of identification information that differs for each mounting location can be obtained. For example, if a fire occurs somewhere, the antenna is melted by the heat at the time of the fire and the radio wave emission function is lost. At this time, the response radio wave from the corresponding IC tag does not reach the monitoring device. The monitoring device transmits an inquiry signal, detects the corresponding IC tag, and notifies the fire.

<Configuration 2>
An arbitrary number of temperature monitoring locations can be attached to an arbitrary number of antennas, a storage device in which identification information for distinguishing itself and others is recorded, and a response signal including the identification information stored in the storage device At a timing when the inquiry signal transmitted from the monitoring device is received or at a predetermined timing, the communication device transmitting the communication to the monitoring device by exciting the antenna, and electrically connecting the antenna and the communication device. A temperature detection IC tag comprising a lead wire connected and fused at a predetermined temperature.

  In each storage device of the plurality of IC tags, identification information that can be distinguished from other IC tags is recorded for each IC tag. Even if the lead wire connecting the antenna and the transmitter is melted, the radio wave emission function of the antenna is lost.

<Configuration 3>
Any number of temperature monitoring locations can be attached to any number of locations, including an antenna, a backing sheet that supports the antenna and melts at a predetermined temperature, and is attached to the temperature monitoring location together with the backing sheet A storage device storing identification information that can distinguish between itself and others, and a response signal including the identification information stored in the storage device at a timing when an inquiry signal transmitted from the monitoring device is received, or predetermined A temperature detecting IC tag comprising: a communication device that excites the antenna at a timing of

  In each storage device of the plurality of IC tags, identification information that can be distinguished from other IC tags is recorded for each IC tag. If the sheet lined to support the antenna is a polymer resin, the shape of the antenna cannot be maintained if it is broken. If this backing sheet is melted by heat, it has the effect of losing the radio wave emission function of the antenna.

<Configuration 4>
An arbitrary number of temperature monitoring locations can be attached to any number of antennas, a protective case that melts at a predetermined temperature, and a case that is accommodated in the protective case and can be distinguished from each other A storage device in which information is recorded and a response signal including the identification information stored in the storage device are excited at the timing when the inquiry signal transmitted from the monitoring device is received or at a predetermined timing. A temperature detection IC tag comprising a communication device for transmitting to the monitoring device.

  In each storage device of the plurality of IC tags, identification information that can be distinguished from other IC tags is recorded for each IC tag. When the protective case is destroyed, the function of the IC tag stops. As long as the protective case is melted by heat, the same effect as in the third configuration is obtained.

<Configuration 5>
The temperature detection IC tag according to Configuration 1 or 2, wherein the material of the antenna or the lead wire is a low melting point metal.

This low melting point metal has a melting point lower than the thermal destruction temperature of the IC chip, and includes two, three or more alloys.
The antenna and the lead wire that are melted by heat when the temperature reaches a predetermined temperature are preferably materials that melt themselves by heat.

<Configuration 6>
In the temperature detection IC tag according to Configuration 3 or 4, the material of the backing sheet or the protective case is a thermoplastic resin, and is cellulose acetate, polyethylene (LDPE), polyethylene (HDPE), polyethylene (ultra high molecular weight) ), Polypropylene, hard polyvinyl chloride, nylon 6, polyacetal, polycarbonate, polypyromellitimide, polytetrafluoroethylene, phenolic resin (novolak), unsaturated polyester resin, IC tag for temperature detection.

  As a material for the backing sheet or protective case, it is preferable to use a thermoplastic resin having a relatively low thermal deformation temperature.

<Configuration 7>
The temperature detection IC tag according to Configuration 1, wherein the antenna is made of a conductive non-metallic body.

  If the antenna is a conductive non-metallic material such as a conductive polymer, the antenna is easily melted by heat at the time of fire and loses the radio wave emission function.

<Configuration 8>
An antenna, a storage device in which identification information that can distinguish between itself and others, and a response signal including the identification information stored in the storage device are received at a timing when an inquiry signal transmitted from the monitoring device is received, or a predetermined signal A communication device that excites the antenna at the timing and transmits the signal to the monitoring device, and is attached to a plurality of locations with different conditions in the temperature monitoring location, with heat when a predetermined temperature is reached. A plurality of IC tags whose functions are stopped, and an analysis device that receives a response signal of each IC tag and displays the relationship between the placement of each IC tag and the operating state of each IC tag. A temperature detection system.

In each storage device of the plurality of IC tags, identification information that can be distinguished from other IC tags is recorded for each IC tag.
By attaching IC tags to various places such as the ceiling, floor, or wall of the room, the state of the room at the time of the fire can be detected, for example, the source of the fire can be identified. If the state of the IC tag installed in many indoor places is taken into a computer and analyzed three-dimensionally, the state of the room can be displayed three-dimensionally.

  Hereinafter, embodiments of the present invention will be described in detail for each example.

FIG. 1 is a block diagram illustrating a temperature detection system according to the first embodiment.
The temperature detection system shown in FIG. 1 is installed in a temperature monitoring place 12 of various facilities that require fire detection and temperature monitoring, such as ordinary houses, schools, apartment houses, offices, and the like. For example, as shown in FIG. 1, a plurality of IC tags 10 </ b> A, 10 </ b> B, and 10 </ b> C are attached and fixed to a ceiling or a wall surface in the temperature monitoring place 12. Each of these IC tags 10A, 10B, and 10C detects a high heat temperature generated by a fire or the like. In order to monitor the occurrence of fire or the like, a monitoring device 24 is provided at an appropriate location away from each IC tag.

FIG. 2 is an explanatory diagram of the IC tag shown in FIG.
As shown in FIG. 2, the IC tag 10 has a structure in which an IC chip 16 and an antenna 14 are connected by a lead wire 30.
The antenna 14 or the lead wire 30 is configured to lose its radio wave emission function by fusing at a predetermined temperature received in a fire or the like.

  The antenna 14 loses the radio wave emission function at a predetermined temperature. However, the antenna 14 is made of a metal or alloy having excellent electrical conductivity and mechanical strength such as copper, aluminum, silver, gold, etc. It is formed in a shape that is excellent in transmitting and receiving The antenna 14 or the lead wire 30 may be made of a nonmetal such as a conductive polymer or a conductive ceramic as long as it has conductivity.

  As shown in the lower part of FIG. 2, the IC tag 10 includes a communication device 28 and a storage device 20. The communication device 28 is provided with a receiving unit 31 and a transmitting unit 32 connected to the antenna 14. The storage device 20 stores identification information 18 that can be distinguished from other IC tags. The IC tag 10 does not require a communication line or power supply for data communication, and can respond by charging with received power.

  As shown in FIG. 1, when the monitoring device 24 periodically transmits an inquiry signal 26 to the IC tags 10A, 10B, and 10C attached at various locations in the temperature monitoring location 12, each IC tag 10A, 10B, 10C transmits a response signal 22 including unique identification information 18 to the monitoring device 24. That is, the communication device 28 excites the antenna 14 at the timing when the inquiry signal 26 transmitted from the monitoring device 24 is received or the predetermined timing when the response signal 22 including the identification information 18 is received. Send to.

  For example, when a fire occurs somewhere, the antenna 14 is melted by heat at the time of the fire and the radio wave emission function is lost. Therefore, the response radio wave from the corresponding IC tag does not reach the monitoring device. The monitoring device 24 transmits an inquiry signal, detects the corresponding IC tag, and gives a fire notification. That is, when the response signal 22 from at least one of the attached IC tags is interrupted, the IC tag has lost its function of emitting radio waves due to heat due to a fire or the like nearby. Can be judged.

FIGS. 3A to 3D show modified examples of the IC tag.
The IC tag shown in FIG. 3A is obtained by connecting an antenna 14 that is easily melted by heat to an IC chip 16. The antenna 14 is made of, for example, a conductive nonmetal such as a conductive polymer or a low melting point metal.

  As described above, the IC tag shown in FIG. 3B is obtained by connecting the IC chip 16 and the antenna 14 with the lead wire 30 that is easily melted by heat. The lead wire 30 is made of a low melting point metal that is melted by heat when a predetermined temperature is reached.

  In addition, the IC tag shown in FIG. 3C is configured by forming a backing sheet 33 that supports the IC chip 16 and the antenna 14 with a sheet that can be easily melted by heat. When the backed sheet 33 is made of a polymer resin or the like, when melted by heat, the shape of the antenna 14 cannot be maintained, and the transmission / reception function of the IC tag 10 is stopped.

  Further, the IC tag shown in FIG. 3D is obtained by housing the IC chip 16 and the antenna 14 in a protective case 34 that is easily melted by heat. When the protective case 34 is melted by heat, the transmission / reception function of the IC tag 10 is stopped.

  As the material of the backing sheet 33 or the protective case 34, the heat deformation temperature is relatively low, cellulose acetate, polyethylene (LDPE), polyethylene (HDPE), polyethylene (ultra high molecular weight), polypropylene, hard polyvinyl chloride, nylon 6, It is preferably selected from any of polyacetal, polycarbonate, polypyromellitimide, polytetrafluoroethylene, phenol resin (novolak), and unsaturated polyester resin. However, other resins may be used.

  The present invention includes a temperature detection system configured using the above-described IC tag. If the state of the IC tag 10 installed in many indoor places is taken into a computer and analyzed three-dimensionally, the state of the room can be displayed in three dimensions. A specific example of this will be described below with reference to FIGS.

FIG. 4 is a block diagram showing a specific example of the monitoring device 24 shown in FIG.
4, the monitoring device 24 includes a transmission unit 40, an inquiry signal generation unit 42, a reception unit 44, a storage device 46, and an analysis device 48. The transmission unit 40 has a function of transmitting the inquiry signal 26 generated by the inquiry signal generation unit 42 using the antenna 41. In the storage device 46, identification information of all IC tags attached to the facility is stored as a database.

  The inquiry signal generator 42 reads each identification information in order from the database and includes it in the inquiry signal 26. Each IC tag receives the inquiry signal 26 and transmits a response signal 22 toward the monitoring device 24 when the identification information matches the identification information stored in its own storage device. The receiving unit 44 receives this, and in the analyzing device 48, the monitoring device 24 determines whether or not the response signal 22 has been received for all the IC tags.

FIG. 5 is a block diagram for explaining a specific operation of the analysis device 48 shown in FIG.
In FIG. 5, a display 52 is a personal computer or the like that executes analysis processing, and displays the result of analysis processing as an image. The storage device 51 stores an information table indicating which IC tag is operating from the identification information received by the receiving unit 44. This information table shows the relationship between the installation location 58, the operation state information 60, and the temperature information 62.

  The analysis device 48 has a function of generating the above information table and displaying the result in an easy-to-understand manner. Specifically, as shown in FIG. 5, an analysis result 56 indicating the temperature distribution for each floor of the building is displayed. Then, the longitudinal sectional view 64 and the plan view 66 of the room on each floor of the building are displayed therein, and the temperature distribution diagrams 68 and 68 corresponding to the respective drawings are displayed (the second floor is displayed in FIG. 5). Yes.) In the temperature distribution diagrams 68 and 68, the horizontal axis indicates the length of the room on each floor, and the vertical axis indicates the temperature of the room.

  By looking at the temperature distribution diagrams 68 and 70 corresponding to the longitudinal sectional view 64 and the plan view 66 of each floor, it is possible to easily detect an abnormal place where the temperature rises. With this, the temperature of the entire building can be managed. Of course, a certain threshold value may be provided, and an alarm may be issued when the temperature exceeds the threshold value.

  If an IC tag that stops transmission at the same temperature is arranged in each place of the facility, it is possible to monitor whether or not the operation stop temperature has been exceeded in each part of the facility. Also, if several IC tags with different operation stop temperatures are fixed at the same location, the temperature rise rate at that location can be determined from the relationship between the operation stop time and the temperature. This is useful for finding the origin of a fire.

It is a block diagram which shows the temperature detection system of Example 1. FIG. 6 is an explanatory diagram of an IC tag used in Example 1. FIG. 6A and 6B are diagrams showing a modification of the IC tag according to the present invention, in which FIG. 5A is an explanatory diagram showing an IC tag having an antenna that is easily blown by heat, and FIG. FIG. 4C is an explanatory diagram showing an IC tag connected with the IC chip, FIG. 4C is an explanatory diagram showing an IC tag constituted by a sheet that easily melts the backing sheet supporting the IC chip and the antenna, and FIG. 4D is an IC chip. It is explanatory drawing which shows the IC tag which accommodated the antenna in the protective case which is easy to fuse | melt with heat. It is a block diagram which shows the specific example of the monitoring apparatus concerning this invention. It is a block diagram explaining the specific operation | movement of the analyzer shown in FIG.

Explanation of symbols

10, 10A, 10B, 10C IC tag 12 Temperature monitoring place 14 Antenna 16 IC chip 18 Identification information 20 Storage device 22 Response signal 24 Monitoring device 26 Inquiry signal 28 Communication device 30 Lead wire 31 Receiving unit 32 Transmitting unit

Claims (8)

Any number of temperature monitoring locations can be installed at any location,
An antenna that loses its radio emission function at a given temperature;
A storage device in which identification information that can distinguish oneself from another is recorded;
A response signal including the identification information stored in the storage device is transmitted to the monitoring device by exciting the antenna at a timing when an inquiry signal transmitted from the monitoring device is received or at a predetermined timing. IC tag for temperature detection characterized by comprising a communication device. Any number of temperature monitoring locations can be installed at any location,
An antenna,
A storage device in which identification information that can distinguish oneself from another is recorded;
A response signal including the identification information stored in the storage device is transmitted to the monitoring device by exciting the antenna at a timing when an inquiry signal transmitted from the monitoring device is received or at a predetermined timing. A communication device to
An IC tag for temperature detection, comprising: a lead wire for electrically connecting the antenna and the communication device and fusing at a predetermined temperature. Any number of temperature monitoring locations can be installed at any location,
An antenna,
A backing sheet that supports the antenna and melts at a predetermined temperature;
A storage device that is attached to the temperature monitoring place together with the backing sheet and has recorded identification information that can distinguish between itself and others,
A response signal including the identification information stored in the storage device is transmitted to the monitoring device by exciting the antenna at a timing when an inquiry signal transmitted from the monitoring device is received or at a predetermined timing. IC tag for temperature detection characterized by comprising a communication device. Any number of temperature monitoring locations can be installed at any location,
An antenna,
A protective case that melts at a given temperature;
A storage device that is stored in the protective case and has recorded identification information that can distinguish between others,
A response signal including the identification information stored in the storage device is transmitted to the monitoring device by exciting the antenna at a timing when an inquiry signal transmitted from the monitoring device is received or at a predetermined timing. IC tag for temperature detection characterized by comprising a communication device. In the temperature detection IC tag according to claim 1 or 2,
The temperature detection IC tag, wherein the material of the antenna or the lead wire is a low melting point metal. In the temperature detection IC tag according to claim 3 or 4,
The backing sheet or the protective case is made of a thermoplastic resin such as cellulose acetate, polyethylene (LDPE), polyethylene (HDPE), polyethylene (ultra high molecular weight), polypropylene, hard polyvinyl chloride, nylon 6, polyacetal, An IC tag for temperature detection, which is selected from polycarbonate, polypyromellitimide, polytetrafluoroethylene, phenol resin (novolak), and unsaturated polyester resin. In the temperature detection IC tag according to claim 1,
The temperature detection IC tag, wherein the antenna is made of a conductive non-metallic material. An antenna, a storage device in which identification information that can distinguish between itself and others, and a response signal including the identification information stored in the storage device are received at a timing when an inquiry signal transmitted from the monitoring device is received, or a predetermined signal A communication device that excites the antenna at a timing and transmits the signal to the monitoring device, and is attached to a plurality of locations under different conditions of the temperature monitoring location, with heat when a predetermined temperature is reached. A plurality of IC tags whose functions are stopped;
A temperature detection system comprising: an analysis device that receives a response signal of each IC tag and displays a relationship between an arrangement of each IC tag and an operation state of each IC tag.

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