KR101520384B1 - thermocouple temperature sensor and temperature sensor system using of it - Google Patents

thermocouple temperature sensor and temperature sensor system using of it Download PDF

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Publication number
KR101520384B1
KR101520384B1 KR1020130094964A KR20130094964A KR101520384B1 KR 101520384 B1 KR101520384 B1 KR 101520384B1 KR 1020130094964 A KR1020130094964 A KR 1020130094964A KR 20130094964 A KR20130094964 A KR 20130094964A KR 101520384 B1 KR101520384 B1 KR 101520384B1
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KR
South Korea
Prior art keywords
thermocouple
temperature
sensor
temperature sensor
lower plate
Prior art date
Application number
KR1020130094964A
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Korean (ko)
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KR20150018731A (en
Inventor
박재희
김민규
김재우
박준범
이재천
Original Assignee
계명대학교 산학협력단
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Application filed by 계명대학교 산학협력단 filed Critical 계명대학교 산학협력단
Priority to KR1020130094964A priority Critical patent/KR101520384B1/en
Priority to PCT/KR2014/004318 priority patent/WO2015020301A1/en
Publication of KR20150018731A publication Critical patent/KR20150018731A/en
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Publication of KR101520384B1 publication Critical patent/KR101520384B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
    • G01K7/04—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples the object to be measured not forming one of the thermoelectric materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/02—Means for indicating or recording specially adapted for thermometers
    • G01K1/026—Means for indicating or recording specially adapted for thermometers arrangements for monitoring a plurality of temperatures, e.g. by multiplexing

Abstract

The present invention relates to a distributed thermocouple sensor and a thermocouple-based distributed temperature measuring system using the same. A lower plate of insulating material; A conductive sheet positioned and attached between the upper plate and the lower plate; And one side thermocouple metal line positioned at the center of the upper plate and sandwiching the other side thermocouple metal line located at the center of the lower plate with the conductive sheet interposed therebetween, And is spaced apart from the sheet.
The present invention can measure a temperature at a point where it is pressed arbitrarily to an object to be measured, so that the temperature range is wide and can be used in various places and applications, and is simple in construction and low in manufacturing cost.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a distributed thermocouple temperature sensor and a thermocouple-

The present invention relates to a temperature sensor and a temperature measuring sensor system, and more particularly, to a distributed type thermocouple temperature sensor capable of measuring a temperature at a point where it is pressed and capable of measuring a temperature over a wide range, .

There are many types of sensors used to measure temperature, including thermocouple sensors.

As shown in FIG. 1A, when both ends of the metal A 11 and the metal B 12 of different kinds are electrically connected to each other, a current flows when a temperature difference occurs at both junctions. This causes a Seeback effect Effect). The thermocouple sensor is a sensor that detects the temperature using this effect.

Referring to FIG. 1B, when one end of the metal A 11 and the other end of the metal B 12 are joined and the other is opened, an electromotive force is generated between the ends b and b '. Here, the junction between the metal A 11 and the metal B 12 is referred to as a 'thermal contact' or a 'temperature-side contact', and an open contact is referred to as a 'cold junction' or a 'reference contact'.

At this time, if the temperature of the temperature-side contact (thermal contact) is higher than the temperature of the reference contact, the current flows from the temperature-side contact point toward the reference contact and the metal A 11 is in the '+' polarity and the metal B 12 is in the ' Respectively. If the reference contacts b and b 'are kept at the same temperature, the thermal power generated between b and b' is determined by the type of metal and the temperature between the two contacts a and b. It is not affected.

2, a conventional multi-channel temperature measuring apparatus using a thermocouple sensor will be described.

The thermocouple sensors TC1 to TC4 are connected to the connection terminals 21-1 to 21-4 of the temperature measuring device 20. [ The thermocouple sensors TC1 to TC4 connected to the respective connection terminals output the temperature of the measurement point at which the temperature is to be measured in the form of a voltage (electromotive force). Since the voltage output from the thermocouple sensor is generally very small (several μV to several tens of μV), the voltages input to the connection terminals 21-1 to 21-4 are amplified by the amplifiers OP1 to OP4, To-digital converters AD1 to AD4, and is input to the microprocessor 27. The micro-

On the other hand, the temperature measured by the thermocouple sensor is related to the temperature of the reference contact (or cold junction) as described above.

Therefore, the RTD sensor RTD1 is used to measure the temperature of the portion (reference contact) where the thermocouple sensors TC1 to TC4 are connected to the respective connection terminals 21-1 to 21-4.

The RTD (RTD1) is a sensor whose resistance varies with temperature. The resistance value of the RTD sensor RTD1 is converted into a voltage through the resistance-voltage converter U1, and the converted voltage is again supplied to the analog-to- Digital converter AD5 and input to the microprocessor 27. [

Then, the microprocessor 27 finds the temperature of each measurement point by using the measured value inputted from each of the thermocouple sensors TC1 to TC4 and the measured value inputted from the RTD sensor RTD1. To this end, the microprocessor 27 calculates the ambient temperature corresponding to the measured value inputted from the RTD sensor RTD1 through the table showing the temperature-resistance relationship. Further, the microprocessor 27 calculates the voltage value of the thermocouple sensor corresponding to the ambient temperature found above from the table showing the temperature-electromotive force relationship.

Then, the microprocessor 27 performs the electromotive force compensation (or the cold junction compensation) by adding or subtracting the above-mentioned voltage value to the voltage measurement value input from each of the thermocouple sensors TC1 to TC4, The temperature of the measurement point is found in the temperature-electromotive force table. This value is the temperature of each measurement point to be measured through each of the thermocouple sensors TC1 to TC4.

The reason for this processing is that the data of the temperature-electromotive force table for the thermocouple sensor is measured when the temperature of the reference contact is a specific value (for example, 0 ° C), and when the temperature of the reference contact is not 0 ° C, Is different. That is, when the temperature of the reference contact point is not 0 ° C, the voltage value corresponding to the temperature change of the reference contact point (difference from 0 ° C) should be added to or subtracted from the voltage measurement value input from the current thermocouple sensor, Can be known.

Therefore, in order to measure the exact temperature of a measuring point using a thermocouple sensor, it is necessary to accurately measure the electromotive force due to the whitening effect occurring at the connecting portion of the thermocouple sensor and the temperature measuring device.

However, conventionally, in a temperature measuring apparatus having a multi-channel thermocouple sensor input, only one RTD 1 is used for measuring the temperature of the reference contact point. Therefore, depending on the position of the RTD 1 RTD 1, There is a problem that the temperature of the portion to which the sensor is connected differs.

In addition, when there is a need to measure temperature over a wide range, conventional devices require a large number of RTD sensors to be installed in a wide range, and that accuracy and precision There is a problem that it falls. That is, when the temperature sensor is installed on the steering wheel of the vehicle to measure the skin temperature of the hand of the driver, the position where the driver takes the steering wheel is arbitrary and different, which makes accurate measurement difficult.

(A1)

The object of the present invention is to provide a distributed type thermocouple temperature sensor capable of measuring a temperature at a point where a pressurization is performed and having a wide temperature range, a simple configuration, a low manufacturing cost, and a temperature measuring system using the same. To provide.

A first aspect of the present invention to solve the above problems is a distributed type thermocouple temperature sensor comprising: an upper plate of an insulating material; A lower plate of insulating material; A conductive sheet positioned and attached between the upper plate and the lower plate; And one side thermocouple metal line positioned at the center of the upper plate and sandwiching the other side thermocouple metal line located at the center of the lower plate with the conductive sheet interposed therebetween, And is spaced apart from the seat.

It is preferable that at least one of the upper plate and the lower plate is formed to be spaced apart from the conductive sheet by forming a step on both sides in the longitudinal direction and the upper plate and the lower plate are made of plastic .

Preferably, the conductive sheet may be an aluminum foil, the one side thermocouple may be constructed of Constantane, and the other side thermocouple may be made of copper.

A second aspect of the present invention is a thermocouple-based distributed temperature measurement system, comprising: the distributed thermocouple temperature sensor; An RTD sensor connected to either the one side or the other side extending from the thermocouple temperature sensor; A bridge circuit connected to the RTD sensor; And a temperature measuring system connected to the thermocouple temperature sensor and the bridge circuit for calculating a temperature through the measured signal.

It is preferable that at least one of the upper plate and the lower plate is formed to be spaced apart from the conductive sheet by forming a step on both sides in the longitudinal direction and the upper plate and the lower plate are made of plastic .

Preferably, the conductive sheet may be an aluminum foil, the one side thermocouple may be constructed of Constantane, and the other side thermocouple may be made of copper.

In addition, the thermocouple temperature sensor and the bridge circuit are preferably connected to the temperature measurement system through a low-pass filter and an amplifier.

The present invention can measure a temperature at a point where it is pressed arbitrarily to an object to be measured, so that the temperature range is wide and can be used in various places and applications, and is simple in construction and low in manufacturing cost.

Further, the present invention can be used for an apparatus that can prevent an accident by warning a state of drowsy operation or the like by measuring the skin temperature from a hand of a driver who is installed on a handle of a vehicle and presses the handle.

1 is a schematic diagram illustrating a conventional thermocouple sensor,
2 is a diagram showing a configuration relating to a conventional temperature measuring apparatus,
3 is an exploded perspective view showing a configuration of a distributed type thermocouple temperature sensor according to an embodiment of the present invention,
4 is a photograph showing a distributed type thermocouple temperature sensor according to an embodiment of the present invention,
FIG. 5 is a graph illustrating a temperature of a distributed thermocouple temperature sensor according to an exemplary embodiment of the present invention,
6 is a diagram illustrating a configuration of a thermocouple-based distributed temperature system according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish it, will be described with reference to the embodiments described in detail below with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. The embodiments are provided so that those skilled in the art can easily carry out the technical idea of the present invention to those skilled in the art.

In the drawings, embodiments of the present invention are not limited to the specific forms shown and are exaggerated for clarity. Also, the same reference numerals denote the same components throughout the specification.

The expression "and / or" is used herein to mean including at least one of the elements listed before and after. Also, singular forms include plural forms unless the context clearly dictates otherwise. Also, components, steps, operations and elements referred to in the specification as " comprises "or" comprising " refer to the presence or addition of one or more other components, steps, operations, elements, and / or devices.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

3 is an exploded perspective view showing a configuration of a distributed type thermocouple temperature sensor according to an embodiment of the present invention. As shown in FIG. 3, the distributed type thermocouple temperature sensor 100 according to the embodiment of the present invention includes an upper plate 110 made of an insulating material having a predetermined thickness at both sides thereof; A lower plate 130 of an insulating material; A conductive sheet 150 positioned and attached between the upper plate 110 and the lower plate 130; And one side thermocouple metal wire 111 located at the center of the upper plate 110 with the conductive sheet 150 interposed therebetween and the other thermocouple metal wire 131 located at the center of the lower plate 130, And the like.

As described above, the present invention is not a structure in which different thermocouple metal wires are connected to each other to measure the temperature at the junction, but the upper plate 110 and the metal wires 131, which are made of insulating material and have one metal wire 111 fixed in the longitudinal direction, A side surface portion of the upper plate 110 in the longitudinal direction forms a step 115 and a metal wire of the upper plate is connected to the conductive sheet 150 150 and the metal wires 111 and 131 of the upper and lower plates 110 and 130 are electrically connected to each other through the conductive sheet 150 so that the temperature can be measured at the pressing point Lt; / RTI >

The present invention having such a structure is not a structure in which the temperature is measured only at the point where the two conventional thermocouple metal wires 111 and 131 are bonded, but the temperature can be measured at a point where the measurement object is arbitrarily pressed, It can be used in various places and applications, and is simple in construction and low in manufacturing cost.

3, the distributed type thermocouple temperature sensor 100 has two different types of thermocouples (thermocouple_copper) fixed to a plastic upper plate and a lower plate 130, which are made of an insulating material, It has a structure with aluminum foil. Here, the step 115 is formed on the side surface of the upper plate or the lower plate 130 so that the aluminum foil is uniformly spaced from the aluminum foil and the aluminum foil can not be used as a temperature sensor since no junction is formed. However, when the pressure is applied to one point of the sensor, the two metal wires 111 and 131 generate a contact point via the aluminum foil, and the temperature of the point can be measured. Then, when the applied pressure is removed, the temperature of the two metals can not be measured because the contact point is not formed again.

The present invention can be applied to an apparatus which can be installed in a handle of a vehicle of the present invention to measure a skin temperature from a hand of a driver and warn a state of drowsy operation or the like to prevent an accident.

The structure of the conventional thermocouple temperature sensor 100, which is measured only at the temperature measurement point, is not suitable because the position where the handle is normally held when the driver starts driving or during operation is not constant. Even if the conventional thermocouple temperature sensor 100 is used, There is a problem in that it is necessary to install the apparatus. In order to solve such a problem, according to the embodiment of the present invention, a temperature sensor structure capable of measuring the skin temperature of the palm of the hand at the moment of gripping the handle, irrespective of the position where the driver grips the handle, is proposed.

Here, the upper plate and the lower plate 130 are preferably made of a plastic material, which is an insulating material. This is because the junction point for making the sideways point should be insulated other than the thermocouple metal wire 111 of the upper plate 110 and the thermocouple metal wire 131 and the conductive sheet 150 of the lower plate 130 and the plastic material is elastic and elastic The metal wire and the conductive sheet 150 can be bonded together under the pressure of the measurement object. The conductive sheet 150 is preferably an aluminum foil because it is highly conductive, thin, and lightweight. Thermocouple metal wires can also be made of constantan and copper, or any other metal that can generate thermoelectrons using different materials.

FIG. 4 is a photograph showing a distribution type thermocouple temperature sensor 100 according to an embodiment of the present invention. FIG. 5 is a graph showing the distribution of the temperature of the distribution type thermocouple temperature sensor 100 according to an embodiment of the present invention Fig.

The distributed thermocouple temperature sensor 100 according to the embodiment of the present invention shown in FIG. 4 is a thermocouple-based sensor having a width of 35 cm and a width of 1 cm. In FIG. 5, the distributed thermocouple temperature sensor 100 according to the embodiment of the present invention And the temperature was measured after applying pressure at 11.7 cm, 17.5 cm, and 23.3 cm from one end.

As shown in FIG. 5, the distributed thermocouple temperature sensor 100 according to the embodiment of the present invention was able to measure the temperature of three points and generated almost the same electromotive force at the same ambient temperature. The characteristic of the distributed thermocouple temperature sensor 100 according to the embodiment of the present invention is that the temperature at the point where the pressure is applied when the first pressure is applied can be measured and the temperature of the second wide range can be measured It is characterized by the fact that it is.

6 is a diagram illustrating a configuration of a thermocouple-based distributed temperature system according to an embodiment of the present invention. As shown in FIG. 6, the thermocouple-based distributed temperature system according to the embodiment of the present invention includes the distributed thermocouple temperature sensor 100; An RTD sensor (200) connected to one side of the thermocouple temperature sensor (100); A bridge circuit 400 connected to the RTD sensor 200; And a temperature measuring system 300 connected to the thermocouple temperature sensor 100 and the bridge circuit 400 for calculating a temperature through a measured signal.

Here, the thermocouple temperature sensor 100 is a sensor for measuring the temperature difference between both ends, and therefore, the absolute temperature of one end point must be measured in order to measure the absolute temperature. The thermocouple-based distributed temperature system according to the embodiment of the present invention shown in FIG. 6 includes a resistive temperature device (RTD) temperature sensor 200 having a resistance varying according to temperature to measure an absolute temperature at one end of the thermocouple temperature sensor 100 ) Is used.

6, the signal from the thermocouple temperature sensor 100 is transmitted through the amplifier 210 and the low pass filter 230 to the temperature measurement system. The RTD temperature sensor 200 is connected to one axis of the bridge circuit 400 and the output signal of the bridge circuit 400 is supplied to the temperature measurement system 300 via the amplifier 310 and the low- .

The thermocouple-based distributed temperature measuring system according to the embodiment of the present invention calculates the temperature difference between the point where the pressure is applied and the end point from the output signal of the thermocouple-based temperature sensor 100 and outputs the output signal of the RTD sensor 200 Output of the thermocouple-based temperature sensor 100 is calculated. The absolute temperature at the point where the pressure is applied is then calculated by adding the two calculated temperatures.

While the invention has been shown and described with respect to the specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Anyone with it will know easily.

100: thermocouple temperature sensor, 110: top plate, 111, 131: thermocouple metal wire
115: step, 130: lower plate, 150: conductive sheet, 200: RTD sensor,
210,310: Amplifier, 230,330: Low-pass filter, 300: Temperature measurement system,
400: bridge circuit

Claims (11)

An upper plate of an insulating material;
A lower plate of insulating material;
A conductive sheet positioned and attached between the upper plate and the lower plate; And
The one thermocouple metal wire located at the center of the upper plate and the other thermocouple metal wire located at the center of the lower plate are positioned with the conductive sheet therebetween and at least one of the upper plate and the lower plate is positioned in the longitudinal direction And is attached to the conductive sheet at a distance from the conductive sheet by forming a step on both sides thereof.
delete The method according to claim 1,
Wherein the upper plate and the lower plate are made of plastic.
The method according to claim 1,
Wherein the conductive sheet is an aluminum foil.
The method according to any one of claims 1, 3, and 4,
Wherein the one side thermocouple is made of Constantane and the other side thermocouple is made of copper.
A thermocouple temperature sensor of claim 1;
An RTD sensor connected to either the one side or the other side extending from the thermocouple temperature sensor;
A bridge circuit connected to the RTD sensor; And
And a temperature measuring system connected to the thermocouple temperature sensor and the bridge circuit for calculating a temperature through the measured signal.
The method according to claim 6,
Wherein at least one of the upper plate and the lower plate forms a step on both sides in the longitudinal direction so as to be spaced apart from the conductive sheet.
8. The method of claim 7,
Wherein the upper plate and the lower plate are made of plastic.
8. The method of claim 7,
Wherein the conductive sheet is an aluminum foil.
10. The method according to any one of claims 7 to 9,
Wherein the one side thermocouple is made of Constantane and the other side thermocouple is made of Copper.
11. The method of claim 10,
Wherein the thermocouple temperature sensor and the bridge circuit are connected through a temperature measurement system, a low-pass filter and an amplifier.



KR1020130094964A 2013-08-09 2013-08-09 thermocouple temperature sensor and temperature sensor system using of it KR101520384B1 (en)

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Application Number Priority Date Filing Date Title
KR1020130094964A KR101520384B1 (en) 2013-08-09 2013-08-09 thermocouple temperature sensor and temperature sensor system using of it
PCT/KR2014/004318 WO2015020301A1 (en) 2013-08-09 2014-05-14 Distribution-type thermocouple sensor and thermocouple-based distribution-type temperature measurement system using same

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KR1020130094964A KR101520384B1 (en) 2013-08-09 2013-08-09 thermocouple temperature sensor and temperature sensor system using of it

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KR101520384B1 true KR101520384B1 (en) 2015-05-22

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220114377A (en) 2021-02-08 2022-08-17 동우 화인켐 주식회사 Sensor array and device including the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023080810A1 (en) * 2021-11-03 2023-05-11 Общество С Ограниченной Ответственностью "Микролаб" Thermoelectric icing sensor

Citations (4)

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Publication number Priority date Publication date Assignee Title
JP2000055743A (en) * 1998-08-06 2000-02-25 Anritsu Keiki Kk Multi-point mean temp. measuring apparatus
JP2003279418A (en) * 2002-03-26 2003-10-02 Dainippon Printing Co Ltd Temperature measuring sheet
KR20110044856A (en) * 2008-06-30 2011-05-02 써번 벤쳐스 피티와이 리미티드 Aerosol sensor
JP2012021992A (en) * 2004-09-10 2012-02-02 Okayama Univ Thermocouple contact type surface roughness measuring method and detection device of surface state of workpiece

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000055743A (en) * 1998-08-06 2000-02-25 Anritsu Keiki Kk Multi-point mean temp. measuring apparatus
JP2003279418A (en) * 2002-03-26 2003-10-02 Dainippon Printing Co Ltd Temperature measuring sheet
JP2012021992A (en) * 2004-09-10 2012-02-02 Okayama Univ Thermocouple contact type surface roughness measuring method and detection device of surface state of workpiece
KR20110044856A (en) * 2008-06-30 2011-05-02 써번 벤쳐스 피티와이 리미티드 Aerosol sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220114377A (en) 2021-02-08 2022-08-17 동우 화인켐 주식회사 Sensor array and device including the same

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