JP2009053084A - Temperature sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temperature sensor which enables measurement of a maximum temperature rise value of an electric apparatus or the like due to heat generation with lower power consumption. <P>SOLUTION: The temperature sensor includes a plurality of circuit interruption means for interrupting circuits at predetermined operating temperatures different individually, a state acquisition means for acquiring information on interruption states representing individual interruption states of the plurality of circuit interruption means, an operating temperature storage means for storing correspondence information wherein the interruption state information is made to correspond to information on the operating temperatures of the circuit interruption means, a maximum temperature detection means for acquiring operating temperature information of a circuit interruption means having the highest operating temperature value as highest temperature information, among interruption means for interrupted circuits on the basis of the acquired interruption state information, and an output means for outputting the highest temperature information. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a temperature sensor that stores a maximum temperature.

Conventionally, in a facility laid out over a wide area such as a railway, it has been difficult to perform uniform management of inspection work for checking the operating status of various electric facilities because the laying range is wide. For this reason, specialized inspectors and patrolmen were dispatched to various places to carry out inspection work using the human senses and manual work.
Therefore, in recent years, an inspection system using an information communication network has been proposed in maintenance work of various electric facilities installed along the railway (see, for example, Patent Document 1).

Here, in the feeders that are power supply lines for the various electric facilities described above, a compression connection device (compression connection portion) using a compression sleeve is used to connect the wires. Once such a compression connection is compressed and formed, the inside cannot be confirmed with the naked eye unless it is destroyed.
JP 11-78884 A

However, the compression connection part as described above is kept in electrical continuity by the integral contact between the compression sleeve and the electric wire, and if there is an abnormality such as insufficient compression or corrosion, heat is generated due to electric resistance and fusing. There is a danger of. For this reason, it is important for safe facility operation to attach a temperature discoloration member such as a temperature label to the compression connection portion and to check and monitor the maximum temperature.
In the inspection system as described above, a sensor and a transmitter (hereinafter referred to as inspection equipment) are attached to the electrical equipment in order to transmit the operation status. These inspection facilities are driven by solar batteries or dry cells. However, since a large solar battery is required to drive the inspection facility, there is an economic problem in realizing it. In addition, when driven by a dry battery, there is an operational problem that it takes time and money to replace the battery. Therefore, it is desirable to save power in inspection equipment. In particular, in order to measure the maximum temperature of the compression connection as described above, the sensor must be operated at all times. Therefore, realization of a temperature sensor capable of measuring the maximum temperature with power saving is desired.

  The present invention has been made in view of such a situation, and provides a temperature sensor capable of measuring a maximum value of a temperature rise due to heat generation of an electric device or the like with power saving.

  In order to solve the above problems, the present invention acquires a plurality of circuit shut-off means for shutting down a circuit at different predetermined operating temperatures, and shut-off state information indicating the shut-off states of the plurality of circuit shut-off means. State acquisition means, operation temperature storage means for storing correspondence information in which interruption state information and operation temperature information of circuit interruption means are associated, and circuit interruption means that has been interrupted based on the acquired interruption state information Among the above, a maximum temperature detecting means for detecting the operating temperature information of the circuit interrupting means having the largest operating temperature as the maximum temperature information from the operating temperature storage means, and an output means for outputting the maximum temperature information are provided. It is a temperature sensor.

  The present invention further comprises determination means for determining whether or not each of the circuit interruption means conducts, and the state acquisition means acquires the result of determination by the determination means as interruption state information and stores it in the operating temperature storage means. Is stored correspondence information in which the identification information of the circuit interruption means and the operating temperature information are associated with each other, and the maximum temperature detection means is based on the interruption state information acquired by the state acquisition means. Among the above temperature sensors, the operation temperature information of the circuit interrupting means having the highest operating temperature is detected from the operating temperature storage means as the maximum temperature information.

  The present invention detects a resistance value of a circuit connected to each of a plurality of resistance elements corresponding to each of a plurality of circuit interruption means and all circuit interruption means and all resistance elements, and generates resistance value information. Value detection means, and the operation temperature storage means stores correspondence information in which resistance value information and predetermined maximum temperature information are associated with each other, and the state acquisition means is controlled by the resistance value detection means. The detected resistance value information is acquired as the cut-off state information, and the maximum temperature detecting means further detects the maximum temperature information corresponding to the resistance value information from the operating temperature storage means.

  According to the present invention, the plurality of circuit interruption means are connected to the intersection of the matrix connection, and the determination means further determines the conduction of each circuit interruption means by determining the conduction from each row to each column of the matrix connection. It is the temperature sensor described above.

  This invention is a compression connection apparatus which connects an electric wire and an electric wire, Comprising: It is a compression connection apparatus provided with the above-mentioned temperature sensor.

  The present invention is a temperature measurement method using a plurality of circuit shut-off means for shutting down a circuit at different predetermined operating temperatures, wherein the state acquisition means indicates a shut-off state indicating the respective shut-off states of the plurality of circuit shut-off means A step of acquiring information, a step of storing correspondence information in which the shut-off state information and the operating temperature information of the circuit shut-off means are associated with each other, and the maximum temperature detecting means in the obtained shut-off state Based on the information, the step of detecting the operating temperature information of the circuit interrupting means having the largest operating temperature among the interrupted circuit interrupting means as the maximum temperature information from the operating temperature storage means, and the output means is the maximum temperature And a step of outputting information.

As described above, according to the present invention, since the temperature is measured using the circuit breaker that breaks the circuit depending on the temperature, the power saving that can measure the temperature of the electrical equipment such as the compression connection part is performed. Temperature sensors can be provided.
Further, according to the present invention, since conduction is confirmed for each of the plurality of circuit interruption means, the operation temperature of the circuit interruption means having the highest operating temperature among the circuit interruption means that are not conductive is set as the maximum temperature information. Can be detected.
Furthermore, according to the present invention, since the conduction of the circuit breaking means is detected by the combined resistance of the resistance elements connected in series to each of the circuit breaking means, each continuity of each circuit breaking means is not inspected. In any case, it is possible to detect which circuit interruption means is conductive.
Furthermore, according to the present invention, since the continuity of each circuit interruption means is inspected by matrix connection, the continuity of each circuit interruption means can be detected by a smaller number of wires than the number of circuit interruption means.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating the concept of the temperature sensor according to the present embodiment. The temperature sensor according to the present embodiment includes a plurality of temperature fuses as a plurality of circuit interrupting means having different operating temperatures for interrupting a circuit. For example, in FIG. 1, a thermal fuse F1, a thermal fuse F2, a thermal fuse F3,..., A thermal fuse F15 are provided, which are 10 ° C., 60 ° C., 70 ° C., 80 ° C.,. It has an operating temperature in the interval of ° C. For example, the circuit of the thermal fuse F1 shown in FIG. 1A has been cut off because its operating temperature has been exceeded. That is, among the interrupted temperature fuses, the operating temperature of the temperature fuse F6 having the highest operating temperature ((b) in FIG. 1) becomes the highest temperature.
If such a temperature sensor provided with a temperature fuse having a different operating temperature is attached to the compression connection portion of the feeder as shown in FIG. 2, for example, any temperature fuse is shut off afterwards. It is possible to measure the maximum temperature related to the heat generation of the compression connection portion within a certain period. For example, the temperature sensor may be attached to the compression connection portion with an adhesive, or may be fixed to the compression connection portion with a fixing member such as a belt.

<First Embodiment>
A first embodiment of a temperature sensor according to the present invention will be described.
FIG. 3 is a block diagram showing the configuration of the temperature sensor according to the present embodiment. The temperature sensor according to the present embodiment includes a state acquisition unit 100, a determination unit 200, a maximum temperature detection unit 300, an operation temperature storage unit 400, an output unit 500, a plurality of temperature fuses, that is, a temperature fuse F1, a temperature. Fuse F2, thermal fuse F3,..., And thermal fuse F15, for example, 15 thermal fuses are provided. Hereinafter, when it is not necessary to separate the individual thermal fuses in the description, they are referred to as thermal fuses FX.

  The thermal fuse FX is, for example, a circuit element configured such that when the surroundings reach a temperature equal to or higher than a certain value, the internal fusible body is melted and the circuit is interrupted. In this embodiment, the thermal fuse F1 has an operating temperature of 60 ° C., the thermal fuse F2 has an operating temperature of 70 ° C., and thereafter operates at 10 ° C. intervals up to the thermal fuse F15 having an operating temperature of 200 ° C. Each temperature fuse having a temperature is provided. Hereinafter, the temperature at which the above-described fusible body melts and the circuit is cut off is referred to as operating temperature, and numerical information indicating the operating temperature is referred to as operating temperature information.

  In this embodiment, a thermal fuse is used as the circuit interrupting means. However, the circuit interrupting means may be any circuit that interrupts the electric circuit when the predetermined operating temperature is reached and the circuit does not self-recover. For example, a fusible alloy type thermal fuse using the melting of the low melting point alloy shown in the present embodiment or an organic compound called a temperature sensitive pellet may be used. In addition, the same effect can be obtained even when a thermostat using a bimetal that does not automatically return is used.

  As shown in FIG. 4, each of the above-described thermal fuses FX has, for example, a thermal fuse F1 connected to the determination unit 200 via a terminal A1, a thermal fuse F2 connected to the determination unit 200 via a terminal A2, and so on. The thermal fuse FX is wired to the determination unit 200 by a terminal AX (X = 1 to 15). That is, each thermal fuse FX is connected to the terminal AX, and this combination is connected to the determination unit 200 in parallel.

The determination unit 200 performs a continuity test for determining whether or not the thermal fuse FX is conductive through each of the terminals AX, and determination result information of the identification information of the thermal fuse FX connected to the terminal AX and the determination result. Is output to the state acquisition unit 100.
The state acquisition unit 100 controls the determination unit 200 and the maximum temperature detection unit 300, and the operation temperature information (hereinafter, the maximum temperature information) of the temperature fuse FX having the highest operation temperature among the plurality of interrupted temperature fuses FX. ) Is acquired from the maximum temperature detection unit 300. The state acquisition unit 100 includes, for example, a timer function and operates at a predetermined time interval to perform state acquisition processing for acquiring maximum temperature information.

  For example, as illustrated in FIG. 5, the operation temperature storage unit 400 stores in advance a correspondence table in which identification information from the temperature fuses F1 to F15 is associated with operation temperature information of each temperature fuse FX. ing. In the present embodiment, the names from the thermal fuse F1 to the thermal fuse F15 will be described as identification information as they are. For example, with reference to this correspondence table, the operating temperature information associated with the identification information of the thermal fuse FX can be acquired.

The maximum temperature detection unit 300 receives the input of the identification information of the temperature fuse FX, and acquires the highest operating temperature information from the operating temperature storage unit 400 among the operating temperature information corresponding to the input identification information.
The output unit 500 outputs the maximum temperature information acquired by the state acquisition unit 100. The output unit 500 transmits the maximum temperature information to a predetermined information terminal by wireless communication, for example.

Next, an operation example in which the temperature sensor according to the present embodiment outputs the maximum temperature information will be described. The user installs the temperature sensor in the vicinity of the temperature measurement target device. For example, as FIG. 2 shows, it installs so that it may affix on the compression connection part of a feeder.
If there is a connection failure or corrosion in the compression connection part of the electric wire and heat is generated due to electrical resistance, the fusible body of the thermal fuse FX having an operating temperature lower than that temperature will melt and the circuit will be cut off according to the raised temperature. Is done. For example, as shown in FIG. 4, when the temperature of the compression connection portion exceeds 70 ° C., the circuit of the temperature fuse F1 and the temperature fuse F2 whose operating temperature is 70 ° C. or less is blown. Here, the thermal fuse F3 whose operating temperature is 80 ° C. is not cut off.

  And the state acquisition part 100 will start a state acquisition process operation, when predetermined time becomes by the above-mentioned timer function. First, the determination unit 200 performs the above-described continuity test. In the example of FIG. 4, the determination unit 200 outputs a continuity test signal, determines that the thermal fuse F1 and the thermal fuse F2 are “not conductive”, and all the thermal fuses F3 to F15 are “conductive”. Is determined. Upon receiving the determination result information from the determination unit 200, the state acquisition unit 100 identifies the identification information of one or more thermal fuses FX determined as “not conducting” from the determination result information, for example, “F1” in the example of FIG. And “F2” are detected and transferred to the maximum temperature detector 300.

  The maximum temperature detection unit 300 reads the operating temperature information corresponding to each of the received one or more pieces of identification information from the operating temperature storage unit 400, and has the highest numerical value among the read operating temperature information, for example, FIG. In the example of FIG. 5 and FIG. 5, “70” is detected as the maximum temperature information. When the state acquisition unit 100 acquires the maximum temperature information detected by the maximum temperature detection unit 300, the state acquisition unit 100 transfers the information to the output unit 500. The output unit 500 transmits the transferred maximum temperature information to a predetermined information terminal wirelessly. The information terminal that has received the maximum temperature information displays the maximum temperature information on the screen display unit, for example.

Although it has been described that the number of thermal fuses used in the implementation of the present invention is fifteen, it may be a plurality of thermal fuses having an operating temperature corresponding to the temperature in the range to be measured by the user. Not exclusively.
In addition, the interval between the operating temperatures of the thermal fuses does not have to be constant. For example, it is possible to use thermal fuses having irregular intervals such as 64 ° C., 86 ° C., 91 ° C., 98 ° C. Or the user may decide according to the measurement target.

Moreover, although it has been described that the state acquisition unit 100 operates at a predetermined regular interval by the timer function, for example, a button may be provided and a processing operation may be performed when the button is pressed.
Further, the output unit 500 has been described as wirelessly transmitting the maximum temperature information to a predetermined information terminal by an electromagnetic method. However, for example, a wired connector unit may be provided, and in this case, a connector of the display device is connected to the connector. It is good also as a structure where the state acquisition part 100 starts operation | movement when is inserted.

  In addition, the output unit 500 has been described as wirelessly transmitting the maximum temperature information to a predetermined information terminal by an electromagnetic method. However, the output unit 500 may be a display unit that displays the maximum temperature information, and the maximum temperature information may be transmitted to humans. An audio output device may be used as long as it can output in a perceptible manner, and for example, a lighting device that lights only when a numerical value indicated by the maximum temperature information exceeds a predetermined threshold value may be provided.

Moreover, although this embodiment demonstrated the operation | movement which outputs the determination result information of the continuity test which the determination part 200 performed to the state acquisition part 100, the output of the determination result information from the determination part 200 to the state acquisition part 100 is the following. It may be performed for wireless communication. That is, the state acquisition unit 100, the maximum temperature detection unit 300, the operating temperature storage unit 400, and the output unit 500 are included in an external information terminal, and the determination unit 200 performs only the continuity test and obtains result information. Is transmitted to the external terminal by wireless communication, the structure of the device installed for each compression connection unit can be simplified, and further power saving can be achieved.
In the description of the operation of the present embodiment, the temperature sensor is installed in the vicinity of the temperature measurement target device. However, the temperature sensor does not necessarily have to be in the vicinity of the electric device. A temperature sensor may be used.

<Second Embodiment>
A second embodiment of the temperature sensor according to the present invention will be described.
FIG. 6 is a block diagram showing the configuration of the temperature sensor according to the present embodiment. The description of the same configuration as the temperature sensor in FIG. 3 is omitted.
The temperature sensor according to the present embodiment includes a state acquisition unit 1100, a resistance value detection unit 1200, a maximum temperature detection unit 1300, an operating temperature storage unit 1400, an output unit 1500, a plurality of temperature fuses FX, and a resistance element. R1, resistive element R2, resistive element R3,..., For example, 15 resistive elements R15 are provided. Hereinafter, when it is not necessary to divide individual resistance elements, it is referred to as a resistance element RX.

Each resistance element RX is, for example, a circuit element having the same resistance value. In the present embodiment, all the resistance elements RX have a resistance value of 1000Ω.
As shown in FIG. 7, for example, each of the resistance elements RX includes a resistance element R1 connected in series with the thermal fuse F1, a resistance element R2 connected in series with the thermal fuse F2, and so on. Each RX is connected in series to a thermal fuse FX. Here, all the thermal fuses FX are wired to the ground side, and all the resistance elements RX are wired to the terminal B.

The resistance value detection unit 1200 performs a measurement process of measuring the resistance value between the terminal B and the ground through the terminal B on the resistance element RX side, generates resistance value information that is numerical information indicating the resistance value, and generates a state acquisition unit. To 1100.
The state acquisition unit 1100 controls the resistance value detection unit 1200 and the maximum temperature detection unit 1300, and acquires the maximum temperature information of the blocked temperature fuse FX from the maximum temperature detection unit 1300.

For example, as illustrated in FIG. 8, the operation temperature storage unit 1400 stores in advance a correspondence table in which resistance value information and maximum temperature information are associated with each other. The resistance value information is a combined resistance value of a plurality of resistance elements connected in parallel. For example, a value of 71 (Ω) which is an approximate combined resistance value when 14 resistance elements of 1000Ω are connected in parallel. In this case, since it is considered that only the thermal fuse F1 is cut off, numerical information indicating 60 ° C. is associated and stored as the maximum temperature information.
Maximum temperature detection unit 1300 detects maximum temperature information corresponding to resistance value information received from resistance value detection unit 1200 from operating temperature storage unit 1400.

Next, an operation example in which the temperature sensor according to the present embodiment outputs the maximum temperature information will be described. In the example shown in FIG. 7, the circuit of the thermal fuse F1 and the thermal fuse F2 is blown out as in the first embodiment.
First, the resistance value detection unit 1200 performs the above-described measurement process. In the example of FIG. 7, the resistance values of the resistance element R1 and the resistance element R2 are not connected to the resistance value detection unit 1200, and the combined resistance value from the resistance element R3 to the resistance element R15 becomes the resistance value. A resistance value of 77Ω is detected as a combined resistance value of 13 connected in parallel, and resistance value information indicating 77 is transmitted to the state acquisition unit 1100.

The state acquisition unit 1100 transfers the resistance value information received from the resistance value detection unit 1200 to the maximum temperature detection unit 1300.
Maximum temperature detection unit 1300 detects maximum temperature information corresponding to the received resistance value information from operating temperature storage unit 1400. For example, if the received resistance value information is 77, the maximum temperature detection unit 1300 obtains the maximum temperature information “70” corresponding to the resistance value information “77” from the operating temperature storage unit 1400 as shown in FIG. To detect. When acquiring the maximum temperature information detected by the maximum temperature detection unit 1300, the state acquisition unit 1100 transfers the information to the output unit 1500. The output unit 1500 transmits the transferred maximum temperature information to a predetermined information terminal wirelessly.

  Further, the plurality of thermal fuses FX and the resistance element RX may be wired as shown in FIG. That is, for example, the resistance element R1 is connected in parallel with the thermal fuse FX, and the resistance element R2 is connected in parallel with the thermal fuse FX. . Then, all combinations of the resistance elements RX and the thermal fuses FX are connected in series, one end thereof is connected to the terminal B, and the other end is grounded.

Further, in the present embodiment, the operation of outputting the resistance value information by the measurement process performed by the resistance value detection unit 1200 to the state acquisition unit 1100 has been described. However, the resistance value information from the resistance value detection unit 1200 to the state acquisition unit 1100 is described. The output may be performed by wireless communication. That is, if the resistance detection unit 1200 performs only the measurement process and transmits the result information to the external terminal by wireless communication, the structure of the device installed for each compression connection unit can be simplified. Furthermore, it is possible to save power.
Thus, by connecting the resistance element RX to each temperature fuse FX, the continuity test of the temperature fuse FX can be performed with simple wiring.

<Third Embodiment>
A third embodiment of the temperature sensor according to the present invention will be described.
FIG. 10 is a block diagram showing the configuration of the temperature sensor according to the present embodiment. The description of the same configuration as the temperature sensor in FIG. 3 is omitted. The temperature sensor according to the present embodiment includes a state acquisition unit 2100, a determination unit 2200, a maximum temperature detection unit 2300, an operating temperature storage unit 2400, an output unit 2500, and a thermal fuse FX.

  FIG. 11 is a view showing the arrangement of the thermal fuses FX according to the present embodiment. The thermal fuse FX is wired on a matrix connection. That is, the thermal fuse FX (X = mn) is arranged at the intersection of the row terminal Cm (m = 1 to M) and the column terminal Dn (n = 1 to N), and the arbitrary terminal Cn to the terminals D1 to D1. By confirming the conduction of Dn, it is configured so that the conduction of the thermal fuse FX connected to the row can be confirmed.

Next, the determination processing operation of the determination unit 2200 will be described.
In the example of FIG. 11, for example, if the path from the terminal C1 to the terminal D1 is conducted, it can be seen that the thermal fuse F11 is not cut off. Thus, the continuity test can be performed for each of the temperature fuses FX11 to Fmn.
In this manner, by laying the thermal fuse FX on the intersection of the matrix connection, it is possible to check the continuity of the m × n thermal fuses FX with m + n terminals. Therefore, when the measured value is handled by a digital circuit, the wiring can be simplified as compared with the first embodiment, and the data amount can be reduced. Further, since there is no need to measure the resistance value as in the second embodiment, it is possible to simplify the wiring without using an A / D conversion circuit with high power consumption.

  Moreover, the output of the determination result information of the continuity test performed by the determination unit 2200 to the state acquisition unit 2100 may be performed by wireless communication. Thereby, since the structure of the apparatus installed for every compression connection part can be simplified, it becomes possible to further save power.

In addition, as shown in FIG. 12, it is good also as a structure provided with the thermometer for measuring the present temperature in the temperature sensor in this embodiment. In this case, for example, the output unit 2500 outputs the current temperature information measured by the thermometer and the maximum temperature information measured as described above.
As described above, according to the temperature sensor of the present invention, the temperature is measured using the thermal fuse that is blown only at the ambient temperature and the circuit is cut off, so that the maximum temperature is constantly monitored. A temperature sensor that does not require a current to be measured can be provided.

It is a figure which shows the temperature sensor by one Embodiment of this invention. It is a conceptual diagram which installs the temperature sensor by one Embodiment of this invention in a compression connection part. It is a block diagram which shows the temperature sensor by the 1st Embodiment of this invention. It is a figure which shows the wiring of the thermal fuse by the 1st Embodiment of this invention. It is a figure which shows the example of data which the operating temperature memory | storage part by the 1st Embodiment of this invention memorize | stores. It is a block diagram which shows the temperature sensor by the 2nd Embodiment of this invention. It is a figure which shows the wiring of the thermal fuse by the 2nd Embodiment of this invention. It is a figure which shows the example of data which the operating temperature memory | storage part by the 2nd Embodiment of this invention memorize | stores. It is a figure which shows the wiring of the thermal fuse by the 2nd Embodiment of this invention. It is a block diagram which shows the temperature sensor by the 3rd Embodiment of this invention. It is a figure which shows the wiring of the thermal fuse by the 3rd Embodiment of this invention. It is a figure which shows the temperature sensor by one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 State acquisition part 200 Determination part 300 Maximum temperature detection part 400 Operation temperature memory | storage part 500 Output part 1100 State acquisition part 1200 Resistance value detection part 1300 Maximum temperature detection part 1400 Operation temperature storage part 1500 Output part 2100 State acquisition part 2200 Determination part 2300 Maximum temperature detection unit 2400 Operating temperature storage unit 2500 Output unit A1 to AX terminal B terminal C1 to Cm terminal D1 to Dn terminal F1 to F15, Fmn Thermal fuse R1 to R15 Resistance element

Claims (6)

A plurality of circuit interrupting means for interrupting the circuit at different predetermined operating temperatures;
State obtaining means for obtaining interruption state information indicating each interruption state of the plurality of circuit interruption means;
Operating temperature storage means for storing correspondence information in which the cutoff state information is associated with the operating temperature information of the circuit cutoff means;
Based on the acquired shut-off state information, the highest operating temperature information for detecting the operating temperature information of the circuit shut-off means having the largest operating temperature among the shut-off circuit shut-off means as the maximum temperature information is detected from the operating temperature storage means. Temperature detection means;
An output means for outputting the maximum temperature information. Determination means for determining whether or not to conduct each of the circuit interruption means,
The state acquisition means acquires the result of determination by the determination means as the blocking state information,
The operating temperature storage means stores correspondence information in which the identification information of the circuit interrupting means and the operating temperature information are associated with each other.
The maximum temperature detecting means is based on the interruption state information acquired by the state acquisition means, and the operation temperature information of the circuit interruption means having the highest operating temperature among the non-conductive circuit interruption means is the highest temperature information. The temperature sensor according to claim 1, further comprising detecting from the operating temperature storage means. A plurality of resistance elements corresponding to each of the plurality of circuit breaking means;
Resistance value detection means for detecting resistance values of circuits connected to all the circuit interrupting means and all the resistance elements to generate resistance value information, and
The operating temperature storage means stores correspondence information in which the resistance value information is associated with predetermined maximum temperature information,
The state acquisition means acquires the resistance value information detected by the resistance value detection means as the cutoff state information,
The temperature sensor according to claim 1, wherein the maximum temperature detection unit detects maximum temperature information corresponding to the resistance value information from the operating temperature storage unit. The plurality of circuit interruption means are connected to the intersection of the matrix connection,
The temperature sensor according to claim 2, wherein the determination unit further determines the conduction of each circuit interruption unit by determining the conduction from each row to each column of the matrix connection. A compression connecting device for connecting electric wires to each other,
The compression connection apparatus provided with the temperature sensor of any one of Claims 1-4. A temperature measurement method using a plurality of circuit interrupting means for interrupting a circuit at different predetermined operating temperatures,
A state acquisition means for acquiring cutoff state information indicating a cutoff state of each of the plurality of circuit cutoff means; and
The operation temperature storage means stores correspondence information in which the interruption state information and the operation temperature information of the circuit interruption means are associated with each other; and
Based on the acquired shut-off state information, the maximum temperature detecting means uses the operating temperature information of the circuit shut-off means having the highest operating temperature among the shut-off circuit shut-off means as the maximum temperature information. Detecting from the storage means;
And a step of outputting the maximum temperature information.

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