CN109725183B - Probe for portable thermoelectric potential detector - Google Patents
Probe for portable thermoelectric potential detector Download PDFInfo
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- CN109725183B CN109725183B CN201811390583.8A CN201811390583A CN109725183B CN 109725183 B CN109725183 B CN 109725183B CN 201811390583 A CN201811390583 A CN 201811390583A CN 109725183 B CN109725183 B CN 109725183B
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- thermoelectric
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- 239000000523 sample Substances 0.000 title claims abstract description 50
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 43
- 229910052802 copper Inorganic materials 0.000 claims abstract description 43
- 239000010949 copper Substances 0.000 claims abstract description 43
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 230000000712 assembly Effects 0.000 claims abstract description 10
- 238000000429 assembly Methods 0.000 claims abstract description 10
- 239000000758 substrate Substances 0.000 claims description 9
- 239000012774 insulation material Substances 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000007769 metal material Substances 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 abstract description 5
- 230000000704 physical effect Effects 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 16
- 239000000463 material Substances 0.000 description 12
- 239000011159 matrix material Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 230000005678 Seebeck effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005676 thermoelectric effect Effects 0.000 description 2
- 230000005679 Peltier effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005616 pyroelectricity Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention relates to the field of physical property testing of metal materials, in particular to a probe for a portable thermoelectric potential detector, which at least comprises a heating assembly and a measuring assembly which are packaged in a probe base body, wherein the heating assembly at least comprises heaters, at least two groups of measuring assemblies are arranged, each group of measuring assembly comprises a copper rod and a thermocouple, the tops of the heaters, the copper rods and the thermocouples extend out of the surface of the probe base body, the end surfaces of the tops of the heaters, the copper rods and the thermocouples are flush with each other, and the heaters, the copper rods and the thermocouples are electrically connected with the thermoelectric potential detector through leads.
Description
Technical Field
The invention relates to the field of physical property testing of metal materials, in particular to a probe for a portable thermoelectric detector.
Background
The thermoelectric effect is a fundamental physical effect of materials. Applications of pyroelectricity can be generally divided into the following areas: analyzing the transformation of the microstructure of the metal material through a thermoelectric test, such as researching alloy aging, martensite tempering and the like; secondly, measuring the temperature of the thermocouple by utilizing the Seebeck effect; thirdly, realizing thermoelectric power generation by utilizing the Seebeck effect; and fourthly, realizing electric refrigeration by utilizing the Peltier effect. Since the texture of the metal material can be analyzed through the thermoelectric test, and the thermoelectric test of the material is not influenced by the surface finish, shape and size of the material to be tested and is sensitive to small changes of the material performance, the method becomes a potential means for characterizing the material under the condition that the size and the shape of the material are variable and the change of the material performance is small.
In 1821 seebeck, a german physicist, found that when two different materials a and B (conductors or semiconductors) form a circuit and the two contacts are at different temperatures, an electromotive force is present in the circuit. This effect is known as the seebeck effect, also known as the thermoelectric effect. The magnitude of its electromotive force is material and temperature dependent. When the temperature difference is small, the electromotive force and the temperature difference have a linear relation EAB=SABΔ T. In the formula, SAB is a relative seebeck coefficient between a and B. Absolute seebeck coefficient of each conductor, whichThe general name is the absolute thermoelectric potential coefficient, also called absolute thermoelectric potential rate, hereinafter referred to as thermoelectric potential coefficient. The ability of a material to form a thermoelectromotive force is generally characterized by a thermoelectromotive coefficient S, which is defined as S = Δ V/. Δ T, where Δ V is a potential difference established at two ends of a temperature difference Δ T. The thermo-electromotive force coefficient S is also known as the thermo-electromotive force (TEP). The thermoelectric potential of the material to be measured needs to be the temperature difference T generated on the material to be measured, the temperature difference can be accurately measured, and the potential difference V caused by the temperature difference also needs to be measured.
The thermoelectric potential of the metal material part changes very little, and in order to accurately measure the thermoelectric potential of the metal part, the structure of the measuring device is generally more complicated, the volume is larger, the field measurement is inconvenient, or some measuring devices are only laboratory measuring devices. Some devices can realize handheld portable measurement, but temperature measurement, heating and voltage measurement of the devices are all carried out on one component, influence factors on the measured voltage are many, temperature control and voltage measurement errors of the devices are large, the temperature control and voltage measurement errors are generally millivolt (mV) level, the devices are mainly used for quickly distinguishing mineral types and are not suitable for measuring metal components. To be able to quickly measure the thermoelectric force of a metal component, a portable probe that can be held by hand is needed, the measurement and signal reading processing control unit is separated, the miniaturization and portability of the measurement probe can be realized, and the measurement precision can be ensured.
Disclosure of Invention
The invention provides a probe for a portable thermoelectric potential detector based on the defects in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a probe for portable thermoelectric potential detector, is at least including encapsulation heating element and the measuring component in the probe base member, heating element includes the heater at least, measuring component has at least two sets ofly, every group measuring component all includes bar copper and thermocouple, the heater the bar copper with its top of thermocouple stretches out the surface and the top end terminal surface of probe base member flush mutually, the heater the bar copper with the thermocouple all is connected with thermoelectric potential detecting instrument electricity through the wire.
Further, there are two sets of the measuring components, and the distances between the two sets of the measuring components and the heater are different.
Further, the thermocouple and the copper rod in each group of the measuring assemblies have a gap therebetween and are equidistant from the heater.
Furthermore, the probe base body is a first base body, and the two measuring assemblies and the heater are packaged in the first base body together.
Further, the probe base body comprises a second base body and a third base body which are independent from each other, the heater and one group of the measuring assemblies are packaged in the second base body, and the other group of the measuring assemblies are packaged in the second base body.
Further, the probe base body is a ceramic base body or a resin base body.
Further, the heating assembly also comprises a heat insulation material layer which is arranged outside the heater and used for separating the heater and the probe base body; and a compression joint ring is sleeved on the copper rod.
Further, the heater is electrically connected with a temperature control unit of the thermoelectric potential detection instrument; the thermocouple is electrically connected with a temperature measuring unit of the thermoelectric potential detection instrument; the copper bar is electrically connected with a voltage measuring unit of the thermoelectric potential detecting instrument.
Furthermore, the measuring assembly and the heating assembly are arranged in parallel, and the length of the heater, the copper bar and the thermocouple, which are extended out of the probe base body, is 1-3 mm.
After adopting the technical scheme, compared with the prior art, the invention has the following advantages: the invention packages the thermocouple, the copper bar, the heater and other components together, thereby ensuring the reliability and miniaturization of the probe. The thermocouple and the copper bar realize temperature measurement and voltage measurement respectively, and the heater heats, has guaranteed that the signal does not interfere with each other. The thermocouple is close to the copper bar as much as possible, but does not contact with the copper bar, and keeps the same distance with the heater, so that the temperature to be measured is close to the temperature of the contact point of the copper bar and the measured piece as much as possible. And the heat insulating material is wrapped outside the heater, so that the influence of the heater on the copper bar and the probe matrix is reduced, and the measurement accuracy of the probe is ensured. The probe of the invention can be packaged very small, can measure small samples, and can measure 20 x 10mm block samples at minimum. The probe is connected with the thermoelectric potential measuring instrument through a lead, can be used for measuring by holding the probe by hand, and can also be fixed on the thermoelectric potential measuring instrument to realize the thermoelectric potential measurement of metal parts or samples.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is a schematic view of the structure in the direction A-A of FIG. 1;
FIG. 3 is a schematic structural diagram of a second substrate according to a second embodiment of the present invention;
FIG. 4 is a schematic view of the structure in the direction B-B of FIG. 3;
FIG. 5 is a schematic structural diagram of a third substrate according to a second embodiment of the present invention;
FIG. 6 is a schematic view of the structure in the direction C-C in FIG. 5.
Wherein,
1. a probe base; 101. a first substrate; 102. a second substrate; 103. a third substrate; 2. a heater; 3. a copper bar; 4. a thermocouple; 5. a crimp ring; 6. a layer of thermal insulating material.
Detailed Description
The invention is further explained below with reference to the drawings and examples.
As shown in figures 1 to 6, the probe for the portable thermoelectric potential detector at least comprises a heating assembly and a measuring assembly which are packaged in a probe base body 1, wherein the heating assembly at least comprises a heater 2, the measuring assembly is at least divided into two groups, each group of measuring assembly comprises a copper bar 3 and a thermocouple 4, the top ends of the heater 2, the copper bar 3 and the thermocouple 4 extend out of the surface of the probe base body 1, the end faces of the top ends of the heater 2, the copper bar 3 and the thermocouple 4 are flush with each other, and the heater 2, the copper bar 3 and the thermocouple 4 are electrically connected with the thermoelectric potential detector through wires.
Preferably, the measuring assembly and the heating assembly are arranged in parallel, and the length of the heater 2, the copper rod 3 and the thermocouple 4, of which the top ends extend out of the probe base body 1, is 1-3mm, so that good contact with the surface of the measured piece is ensured.
The copper bar 3 is made of pure copper, a pressure connection ring 5 is sleeved at the bottom end of the copper bar 3, the copper bar 3 is connected with a lead in a pressure connection mode, and the pressure connection ring 5 is also made of pure copper.
The outer side of the heater 2 is coated with a heat insulation material layer 6, the heat insulation material layer 6 in the embodiment is a heat insulation film, the thickness of the heat insulation material layer 6 is 1-3mm, the surface in contact with a measured piece is not coated with the heat insulation material layer 6, the influence of the heater 2 on the copper rod 3 and the probe base body 1 can be reduced by arranging the heat insulation material layer 6, and the measurement accuracy of the probe is guaranteed.
The probe base body 1 is made of insulating materials such as resin, ceramics, plastics and the like.
In this embodiment, there are two sets of measuring components, and the distances between the two sets of measuring components and the heater 2 are different, one of the sets is close to the heater 2, and the other set is far from the heater 2. The thermocouple 4 and the copper bar 3 in each group of measuring assembly are close to each other but do not contact each other, and the distance between the thermocouple 4 and the copper bar 3 is equal to that between the heater 2, so as to ensure that the temperature measured by the thermocouple 4 is as close to the temperature of the contact point of the copper bar 3 and the measured piece as possible
Referring to fig. 1 and 2, as one embodiment, the probe base 1 is a first base 101, and two measuring assemblies and the heater 2 are packaged in the first base 101.
As another embodiment, referring to fig. 3 to 6, the probe base 1 includes a second base 102 and a third base 103 which are independent from each other, the heater 2 and one group of measurement components are enclosed in the second base 102, the other group of measurement components are enclosed in the second base 102, and the first base 101 and the second base 102 cooperate to perform thermoelectric force measurement.
The heater 2 is electrically connected with a temperature control unit of the thermoelectric potential detection instrument; the thermocouple 4 is electrically connected with a temperature measuring unit of the thermoelectric potential detecting instrument; the copper bar 3 is electrically connected with a voltage measuring unit of the thermoelectric potential detecting instrument. The accessible is close to the heating power of thermocouple 4 of heater 2 one side to reach preset heating temperature, make two of quilt survey piece produce the temperature difference with the position of bar copper 3 contact, thereby produce the voltage difference, measure the voltage difference through the voltage measuring unit of the thermoelectric potential detecting instrument that bar copper 3 is connected.
When metal thermoelectric potential is measured, the probe matrix 1 can be pressed on a measured piece in a handheld mode, of course, the probe matrix 1 can also be fixed on a thermoelectric potential detection instrument for use, the probe matrix 1 can move along the X direction or the Y direction by controlling a displacement device, a force sensor is connected on the probe matrix 1, the contact force between the probe and the measured piece can be controlled, the effect of hands is replaced, the influence of manual operation is reduced, and the measurement precision is improved.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (5)
1. The utility model provides a probe for portable thermoelectric potential detector which characterized in that: the thermoelectric force measuring device at least comprises a heating assembly and a measuring assembly which are packaged in a probe base body, wherein the heating assembly at least comprises heaters, the measuring assembly at least comprises two groups, each group of measuring assembly comprises a copper bar and a thermocouple, the top ends of the heaters, the copper bars and the thermocouples extend out of the surface of the probe base body, the end surfaces of the top ends of the heaters, the copper bars and the thermocouples are flush with each other, and the heaters, the copper bars and the thermocouples are electrically connected with a thermoelectric force detecting instrument through leads;
the distance between the two groups of measuring components and the heater is different; the thermocouple and the copper bar in each group of the measuring assemblies have a gap therebetween and are equidistant from the heaters; the probe base body is a first base body, and the two measuring assemblies and the heater are packaged in the first base body together; the probe base body comprises a second base body and a third base body which are independent of each other, the heater and one group of the measuring assemblies are packaged in the second base body, and the other group of the measuring assemblies are packaged in the second base body.
2. The probe for a portable thermoelectric detector according to claim 1, wherein: the probe substrate is a ceramic substrate or a resin substrate.
3. The probe for a portable thermoelectric detector according to claim 1, wherein: the heating assembly further comprises a heat insulation material layer arranged outside the heater and used for separating the heater and the probe substrate; and a compression joint ring is sleeved on the copper rod.
4. The probe for a portable thermoelectric detector according to claim 1, wherein: the heater is electrically connected with a temperature control unit of the thermoelectric potential detection instrument; the thermocouple is electrically connected with a temperature measuring unit of the thermoelectric potential detection instrument; the copper bar is electrically connected with a voltage measuring unit of the thermoelectric potential detecting instrument.
5. The probe for a portable thermoelectric detector according to claim 1, wherein: the measuring assembly and the heating assembly are arranged in parallel, and the length of the heater, the copper bar and the thermocouple, which are extended out of the probe base body, is 1-3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811390583.8A CN109725183B (en) | 2018-11-21 | 2018-11-21 | Probe for portable thermoelectric potential detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811390583.8A CN109725183B (en) | 2018-11-21 | 2018-11-21 | Probe for portable thermoelectric potential detector |
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| Publication Number | Publication Date |
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| CN109725183A CN109725183A (en) | 2019-05-07 |
| CN109725183B true CN109725183B (en) | 2021-12-17 |
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| CN201811390583.8A Active CN109725183B (en) | 2018-11-21 | 2018-11-21 | Probe for portable thermoelectric potential detector |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112034002B (en) * | 2020-09-04 | 2023-07-21 | 中国计量科学研究院 | Device and method for measuring Seebeck coefficient of thermoelectric material |
| CN114623946A (en) * | 2022-03-11 | 2022-06-14 | 苏州热工研究院有限公司 | Thermoelectric potential probe |
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| WO2012116227A2 (en) * | 2011-02-23 | 2012-08-30 | California Institute Of Technology | Measuring seebeck coefficient |
| US20150130472A1 (en) * | 2013-11-08 | 2015-05-14 | Electronics And Telecommunications Research Institute | Thermoelectric conductivity measurement instrument of thermoelectric device and measuring method of the same |
| CN105606643A (en) * | 2014-11-25 | 2016-05-25 | 国家纳米科学中心 | Thermoelectric property measuring sample platform and thermoelectric property measuring apparatus |
| CN107037264A (en) * | 2017-05-02 | 2017-08-11 | 国家纳米科学中心 | Pyroelectric material performance parameter measuring apparatus and measuring method |
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| CN108061738A (en) * | 2017-12-01 | 2018-05-22 | 国家纳米科学中心 | The measuring device and method of a kind of sample thermal conductivity and thermoelectrical potential |
| CN108459191A (en) * | 2018-03-26 | 2018-08-28 | 苏州热工研究院有限公司 | A kind of Portable thermal potential detector |
| CN108490237A (en) * | 2018-03-08 | 2018-09-04 | 华中科技大学 | A kind of device and method of potable metal pipeline thermoelectric gesture nondestructive measurement |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102967624B (en) * | 2012-11-20 | 2014-08-27 | 清华大学 | Device for testing Seebeck coefficient |
| CN105158542B (en) * | 2015-08-31 | 2018-09-07 | 苏州热工研究院有限公司 | Metal fever potential detecting instrument |
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2018
- 2018-11-21 CN CN201811390583.8A patent/CN109725183B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012116227A2 (en) * | 2011-02-23 | 2012-08-30 | California Institute Of Technology | Measuring seebeck coefficient |
| US20150130472A1 (en) * | 2013-11-08 | 2015-05-14 | Electronics And Telecommunications Research Institute | Thermoelectric conductivity measurement instrument of thermoelectric device and measuring method of the same |
| CN105606643A (en) * | 2014-11-25 | 2016-05-25 | 国家纳米科学中心 | Thermoelectric property measuring sample platform and thermoelectric property measuring apparatus |
| CN107037264A (en) * | 2017-05-02 | 2017-08-11 | 国家纳米科学中心 | Pyroelectric material performance parameter measuring apparatus and measuring method |
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| CN108061738A (en) * | 2017-12-01 | 2018-05-22 | 国家纳米科学中心 | The measuring device and method of a kind of sample thermal conductivity and thermoelectrical potential |
| CN108490237A (en) * | 2018-03-08 | 2018-09-04 | 华中科技大学 | A kind of device and method of potable metal pipeline thermoelectric gesture nondestructive measurement |
| CN108459191A (en) * | 2018-03-26 | 2018-08-28 | 苏州热工研究院有限公司 | A kind of Portable thermal potential detector |
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