CN204188309U - A kind of accurate thermopair reference edge samming compensating module - Google Patents
A kind of accurate thermopair reference edge samming compensating module Download PDFInfo
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- CN204188309U CN204188309U CN201420700198.XU CN201420700198U CN204188309U CN 204188309 U CN204188309 U CN 204188309U CN 201420700198 U CN201420700198 U CN 201420700198U CN 204188309 U CN204188309 U CN 204188309U
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Abstract
The utility model discloses a kind of accurate thermopair reference edge samming compensating module, comprise housing, the pcb board of a double-sided copper-clad is provided with in housing, above-mentioned pcb board is provided with the base of copper sheathing and thermopair Quick connector, the front end of housing is provided with double end plug, and two plugs of described double end plug connect the both positive and negative polarity of plug connector base respectively by thin copper wire.The utility model can solve reference junction temperature sensor and the unreasonable temperature difference problem caused of thermopair reference edge physical design, this module can provide accurate, stable reference edge to compensate for thermopair precise temperature measurement/simulation process, after using this module, reference edge compensating error≤± 0.1 DEG C in thermocouple measurement/calibration process.
Description
Technical field
The utility model belongs to temperature measurement/calibration/field tests, relates to a kind of accurate thermopair reference edge samming compensating module, and this module can provide accurate, stable reference edge to compensate for thermopair precise temperature measurement/simulation process.
Background technology
Thermopair is a kind of sensor the most frequently used in temperature measurement industry, and it converts temperature signal to thermopower signal, is converted to the temperature of measured medium by electric measuring instrument.Thermopair has the advantages such as measuring accuracy is high, scope large, fast response time, dependable performance, long service life, is used widely in temperature measurement, calibration and field tests.Due to thermopair long-term work in high temperature environments, thermopair there will be aging, rotten or oxidation, affects the thermopower of thermopair, temperature measurement accuracy be can not be guaranteed.And temperature survey whether accurate stable directly will affect quality and the stability of industrial products, therefore, thermopair not only needs to carry out close inspection when dispatching from the factory, and in use needs regularly to examine and determine.
The ultimate principle of thermocouple temperature measurement is the pyroelectric phenomena found based on Seebeck, and link together conductor A and B of two kinds of different materials composition closed-loop path, when two contacts 1 from 2 temperature different time, as T>T
0, will produce thermopower in the loop, this kind of phenomenon is called thermoelectric effect.Wherein, conductor A, B are called thermode, are welded into A, B the two poles of the earth to then forming thermopair.In two contacts, contact 1 is welded together at the two poles of the earth, during thermometric, it is placed in thermometric field, therefore be called measuring junction, hot junction or working end, and contact 2 is among environment, and requires temperature constant, therefore be called reference edge, cold junction or free end.From thermocouple temperature measurement principle, the thermopower that thermopair produces because of temperature variation is the difference of function of measuring junction temperature and reference junction temperature, and when thermopair reference junction temperature remains unchanged, thermopower is now the single-valued function of dut temperature.The phasing meter often used in industry and Displaying Meter, be all 0 DEG C according to thermopair reference edge and make.In addition, in actual applications, due to the measuring junction of thermopair and reference edge distance very near, reference edge is exposed to again in air, easily be subject to the impact of environment temperature, reference junction temperature is difficult to keep constant, and the change of reference junction temperature will directly affect thermometric accuracy, and adequate measures therefore will be adopted to compensate reference junction temperature.At present, conventional thermopair reference junction temperature compensation method mainly contains reference edge constant temperature method and reference junction temperature Auto-Compensation-Method.Wherein, the reference edge of thermopair is placed in mixture of ice and water by reference edge constant temperature method, and making its reference junction temperature constant is 0 DEG C.In order to ensure that reference edge is 0 DEG C, must running check, and supplement appropriate ice bits.This kind of method needs to purchase a lot of utility appliance, and waste time and energy, be only applicable to laboratory, be not suitable for general industry occasion, therefore on the method basis, also been proposed constant temperature channel process, extend the range of application of these class methods, but the compensation range of constant temperature channel process is little, only can be compensated near constant temperature point.The usual serviceability temperature sensor of reference junction temperature Auto-Compensation-Method, is placed on the reference edge of thermopair, and detects the temperature variation of reference edge constantly, and from thermocouple temperature measurement principle, the thermopower of thermopair reality is measured value and reference edge modified value sum.Domestic temperature in-site measurement/calibration instrument uses Pt100 platinum resistance as the reference edge of thermopair usually, but the domestic equipment of the overwhelming majority does not all have good with reference to end temperature difference Resolving probiems at present.Under the prerequisite that reference junction temperature sensor error is ignored, because of reference junction temperature sensor and thermopair reference edge physical design is unreasonable causes between the two that actual temperature difference is general at 2 DEG C-4 DEG C, this error has become source of error very large in thermopair precise temperature measurement/simulation process.
Summary of the invention
The purpose of this utility model is just to solve reference junction temperature sensor and the unreasonable temperature difference problem that causes of thermopair reference edge physical design and provides a kind of accurate thermopair reference edge samming compensating module, this module can provide accurate, stable reference edge to compensate for thermopair precise temperature measurement/simulation process, after using this module, reference edge compensating error≤± 0.1 DEG C in thermocouple measurement/calibration process.
Technical solution of the present utility model is: a kind of accurate thermopair reference edge samming compensating module, comprise housing, the pcb board of a double-sided copper-clad is provided with in housing, above-mentioned pcb board is provided with the base of copper sheathing and thermopair Quick connector, the front end of housing is provided with double end plug, and two plugs of described double end plug connect the both positive and negative polarity of plug connector base respectively by thin copper wire.
Above-mentioned copper sheathing inner chamber and Pt100 reference junction temperature sensor adapt, the base (adopting heat conduction glass fiber material and copper to do) of copper sheathing and thermopair Quick connector is all welded on the pcb board of a double-sided copper-clad, by this modular design enable reference junction temperature sensor and thermopair reference edge realize temperature consistent and change synchronous.
Further, described case top is covered with sponge one side glue.Be covered with sponge one side glue in case top, when thermocouple junction is inserted, can sealing function be played, reduce the instantaneous variation impact that ambient temperature causes because air flows further.
Further, above-mentioned plug is banana head.Use thin copper wire to connect object to be: banana plug inserts Electrical Measuring Instrument inside, temperature can by the impact of instrument internal heating, and the base of the thermopair connected by thin copper wire can be eliminated basic for the temperature of this part impact.And the spacing designed between banana plug is 19mm, and this spacing can be adapted to the metering Electrical Measuring Instrument of each class standard.
Further, described housing can use aluminum material, the sense ambient temperature that aluminium shell can be good.
The utility model has the advantages that: this thermostat module has larger thermal inertia, the impact impact that the instantaneous variation of external temperature causes inside modules temperature is very little; Large-arealy cover copper product owing to using, make temperature compensation sensor have identical temperature changing trend with the thermopair reference edge of insertion in inside modules; Temperature compensation sensor can be correct measure and insert the temperature of reference edge; The banana plug of 19mm spacing can be adapted to the temperature metering test/analog meter of the overwhelming majority; Outside sponge one side glue and the aluminium shell of using encapsulates, and overall tightness is good; Compact, uses simple.
Accompanying drawing explanation
Fig. 1. the utility model accurate thermopair reference edge samming compensating module structural representation
1. copper sheathing 2. thermopair Quick connector 3. double-side copper-applying pcb board 4. thin copper wire 5. banana plug 6. sea one side glue 7. aluminium shells in figure
Fig. 2. the utility model accurate thermopair reference edge samming compensating module schematic appearance.
Embodiment
As shown in Figure 1 and Figure 2,
First, the base of copper sheathing 1 and thermopair Quick connector 2 is welded on the pcb board 3 of double-sided copper-clad; Then, be fixed on pcb board 3 by two diameter 4mm banana plugs 5, its spacing is 19mm, and it is connected with the both positive and negative polarity of thermopair Quick connector 2 base respectively with two thin copper wires 4; Finally, use aluminium shell 7 to encapsulate this module and fix, and utilize at the top of module sponge one side glue to seal.
The utility model accurate thermopair reference edge samming compensating module schematic appearance as shown in Figure 2, during use, Pt100 reference junction temperature sensor and thermopair reference are held the copper sheathing 1 and the thermopair Quick connector 2 that are placed in this module respectively, and by banana plug being inserted the measurement that metering Electrical Measuring Instrument realizes reference junction temperature/electromotive force.The utility model accurate thermopair reference edge samming compensating module adopts Seal Design, compact, use simple, influenced by ambient temperature little, accurate, stable reference edge can be provided to compensate for thermopair precise temperature measurement/simulation process, reference junction temperature compensating error is controlled within the scope of ± 0.1 DEG C.
Claims (4)
1. an accurate thermopair reference edge samming compensating module, it is characterized in that: comprise housing, the pcb board of a double-sided copper-clad is provided with in housing, above-mentioned pcb board is provided with the base of copper sheathing and thermopair Quick connector, the front end of housing is provided with double end plug, and two plugs of described double end plug connect the both positive and negative polarity of plug connector base respectively by thin copper wire.
2. one according to claim 1 accurate thermopair reference edge samming compensating module, is characterized in that: described case top is covered with sponge one side glue.
3. one according to claim 1 and 2 accurate thermopair reference edge samming compensating module, is characterized in that: above-mentioned plug is banana head.
4. one according to claim 1 and 2 accurate thermopair reference edge samming compensating module, is characterized in that: described housing uses aluminum material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420700198.XU CN204188309U (en) | 2014-11-20 | 2014-11-20 | A kind of accurate thermopair reference edge samming compensating module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420700198.XU CN204188309U (en) | 2014-11-20 | 2014-11-20 | A kind of accurate thermopair reference edge samming compensating module |
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| CN204188309U true CN204188309U (en) | 2015-03-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107402079A (en) * | 2017-09-07 | 2017-11-28 | 南京优倍电气有限公司 | A kind of cold-junction compensation terminal for thermocouple temperature measurement |
| WO2019137331A1 (en) * | 2018-01-09 | 2019-07-18 | 北京康斯特仪表科技股份有限公司 | High temperature dry block temperature calibrator |
| WO2019137330A1 (en) * | 2018-01-09 | 2019-07-18 | 北京康斯特仪表科技股份有限公司 | Low-temperature dry block temperature calibrator |
| RU2789053C1 (en) * | 2022-04-12 | 2023-01-27 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" | Device for compensating connection of free ends of thermoelectric converters |
-
2014
- 2014-11-20 CN CN201420700198.XU patent/CN204188309U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107402079A (en) * | 2017-09-07 | 2017-11-28 | 南京优倍电气有限公司 | A kind of cold-junction compensation terminal for thermocouple temperature measurement |
| WO2019137331A1 (en) * | 2018-01-09 | 2019-07-18 | 北京康斯特仪表科技股份有限公司 | High temperature dry block temperature calibrator |
| WO2019137330A1 (en) * | 2018-01-09 | 2019-07-18 | 北京康斯特仪表科技股份有限公司 | Low-temperature dry block temperature calibrator |
| EP3739313A4 (en) * | 2018-01-09 | 2022-01-26 | Beijing Const Instruments Technology Inc. | Low-temperature dry block temperature calibrator |
| EP3739312A4 (en) * | 2018-01-09 | 2022-04-13 | Beijing Const Instruments Technology Inc. | High temperature dry block temperature calibrator |
| US11402278B2 (en) | 2018-01-09 | 2022-08-02 | Beijing Const Instruments Technology Inc. | Low-temperature dry block temperature calibrator |
| US11959814B2 (en) | 2018-01-09 | 2024-04-16 | Beijing Const Instruments Technology Inc. | High-temperature dry block temperature calibrator |
| RU2789053C1 (en) * | 2022-04-12 | 2023-01-27 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" | Device for compensating connection of free ends of thermoelectric converters |
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