CN110375871A - Surface temperature measurement method based on thermoelectric effect - Google Patents
Surface temperature measurement method based on thermoelectric effect Download PDFInfo
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- CN110375871A CN110375871A CN201910799448.7A CN201910799448A CN110375871A CN 110375871 A CN110375871 A CN 110375871A CN 201910799448 A CN201910799448 A CN 201910799448A CN 110375871 A CN110375871 A CN 110375871A
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- thermoelectric element
- temperature
- thermoelectric
- measurement method
- surface temperature
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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
Abstract
The present invention proposes a kind of surface temperature measurement method based on thermoelectric effect, is the surface temperature measurement method for obtaining temperature by measuring electrical parameter using thermoelectric effect and combining with heat-flow measurement.The present invention obtains surface temperature and no longer needs to arrangement distinct faces temperature sensor, eliminates interference and assembly difficulty of the temperature sensor to measurand, facilitates the hot-fluid and temperature simultaneously measuring for realizing internal small space；It solves the problems, such as the thermal measurement of thermal management applications, is expected to realize the global function of the thermal management applications of thermoelectric effect；It is the easy to use, flexible arrangement of the present invention, at low cost, thermal management applications level can be effectively promoted, the small space temperature in inside and heat-flow measurement demand in different temperatures region is widely used in, especially meets the temperature and heat flux measurement of inside battery.
Description
Technical field
The surface temperature measurement method based on thermoelectric effect that the present invention relates to a kind of, it is especially a kind of to be imitated based on thermoelectric
It answers, passes through the surface temperature measurement method combined with heat-flow measurement.
Background technique
Thermoelectric effect is reversible physical effect (peltier effect, Thomson effect and Seebeck effect etc.), phase
Pass technology can realize that thermo-electric generation or electric drive realize refrigeration and heating.The thermoelectric effect of semiconductor is quite significant, answers at present
With wider semiconductor refrigerating module have many advantages, such as it is small in size, without mechanical moving element, control simple and convenient.
Temperature is most basic and most important physical parameter, and in the prior art, the contact for surface temperature measurement is surveyed
Warm method needs to arrange that temperature sensor tests object to be measured, and caused by by the interference of sensor and outside, to
Surveying the data that object measures, obviously there are extra errors with actual conditions.
Heat flow transducer is the basic tool of measurement heat transmitting (heat flow density or heat flux).Thermoelectric pile formula (temperature gradient
Type) heat flow transducer is using most common a kind of heat flow transducer, when there is type of thermal communication to overheat flow sensor, in thermal-flow sensor
Temperature gradient is produced on the thermoresistance layer of device, the heat flow density by heat flow transducer can be obtained by according to Fourier's law.
Summary of the invention
Present invention aim to address the defects of the prior art, provide one kind based on thermoelectric effect, pass through measurement electricity ginseng
The surface temperature measurement method that number obtains temperature and combines with heat-flow measurement.
Technical principle the present invention relates to surface temperature measurement method is based on thermoelectric effect, as shown in Figure 1, thermoelectricity is first
The both ends plane heat source of partAWithBSurface temperature be respectivelyT AWithT B, it is by the hot-fluid of thermoelectric elementQ, the two of thermoelectric element connect
Line end forms open circuit and short circuit.
When two terminals are opened a way, in the hot end face of thermoelectric element and the cold end face two sides formation temperature difference, based on Seebeck effect
It answers, the presence of the temperature difference can generate thermo-electromotive forceV o.ThenV oFor
(1)
In formulaFor the Seebeck coefficient mean value of thermoelectric element cool and heat ends；ΔT oFor open circuit when, the cold end face of thermoelectric element and
The temperature difference in hot end face.
When two terminals shorts, then short circuit current can be generated in the loopI s, can be with according to paltie effect and principle
Obtain following relationship:
(2)
In formulaΔT sWhen for short circuit, the cold end face of thermoelectric element and the temperature difference in hot end face.RFor the resistance of thermoelectric element.
Formula can be derived by the definition of (1), (2) formula simultaneous and thermoelectric figure of merit Z according to thermoelectric effect principle
(3)
(3)
Based on above-mentioned formula (3), it is only necessary to measure open-circuit voltageV o, short circuit currentI s, thermoelectric element resistance R and
The thermoelectric figure of merit Z of thermoelectric element, can be obtained the mean temperature of thermoelectric elementValue；By open-circuit voltageV o, Seebeck coefficient it is equal
Value, the open circuit temperature difference can be obtained by formula (1)ΔT o.Simultaneous、ΔT o, can solve to obtain thermoelectric element cold end face and
The temperature in hot end face.Thermal contact resistance is considered, in conjunction with hot-fluidQ, the temperature of heat source surface is arrived according to Fourier lawT AWithT B。
To realize goal of the invention, it is based on above-mentioned technical principle, the technical scheme is that a kind of be based on thermoelectric effect
Surface temperature measurement method, the surface temperature measurement system based on thermoelectric effect include thermoelectric element, thermometric object A, survey
Warm object B, ammeter and voltmeter, the thermoelectric element are between the thermometric object A and the thermometric object B, and good
Good thermo-contact, the ammeter and the voltmeter measure obtain the short circuit current and open circuit of the thermoelectric element electrical circuit respectively
Voltage.
Using above-mentioned temperature measurement system realize thermometry and step based on thermoelectric effect, first, in advance
Experiment obtains the temperature difference and voltage relationship of the different temperatures of the thermoelectric element both ends of the surface, and experiment in advance obtains the thermoelectricity member
The resistance value of the different temperatures of part, in advance experiment obtain the thermal resistance value of the different temperatures of the thermoelectric element, and experiment obtains in advance
The thermoelectric figure of merit Z of the different temperatures of the thermoelectric element is previously obtained the thermoelectric element and thermometric object A and thermometric object B
Thermal contact resistance value, above-mentioned relation and parameter value are recycled and reused for temperature taking process；Second, measure the open circuit of the thermoelectric element
Voltage and short circuit current；The mean temperature of the thermoelectric element is calculated according to above-mentioned principle formula (3) in third；4th,
According to the temperature difference and voltage relationship of the thermoelectric element both ends of the surface, the thermoelectricity is obtained by the open-circuit voltage of the thermoelectric element
The temperature difference of element both ends of the surface；5th, according to the temperature difference of the mean temperature of the thermoelectric element and thermoelectric element both ends of the surface, meter
The temperature in the cold end face and hot end face that obtain the thermoelectric element is calculated, and then obtains the surface temperature of thermometric object A and thermometric object B
Degree；6th, by obtaining the thermal resistance value of the thermoelectric element in advance, according to the temperature difference and voltage of the thermoelectric element both ends of the surface
Relationship obtains the temperature difference of the thermoelectric element both ends of the surface, is then calculated according to Fourier law and flows through the thermoelectric element
Hot-fluid.
The thermoelectric element is Commercial semiconductors refrigeration module.
The thermoelectric element is thin film thermoelectric element.
The thermoelectric element is the shapes such as rectangular, round, triangle, polygon and irregular figure, according to measurand
Structure snd size require be customized and match.
The thermoelectric element can select the material of different figure of merit Z values, and change the brachium of p-type and N-type element, cut
The parameters such as area are customized.
The beneficial effects of the invention are as follows the invention adopts the above technical scheme, which has the following advantages: utilizing the temperature difference
Temperature and heat-flow measurement can be achieved at the same time in electrical effect；It obtains surface temperature and no longer needs to arrangement distinct faces temperature sensor, eliminate
Interference and assembly difficulty of the temperature sensor to measurand facilitate the hot-fluid and temperature simultaneously measuring for realizing internal small space；
Temperature parameter can be obtained by measuring electrical parameter, method is simple, reliable, high sensitivity, is able to achieve the measurement of high-performance temperature；Solution
The thermal measurement problem for thermal management applications of having determined, in conjunction with thermoelectric effect, thermoelement can simultaneously serve as refrigerating/heating execution
Device is expected to realize the global function of the thermal management applications of thermoelectric effect；The configuration of the present invention is simple, easy to use, flexible arrangement, at
This is low, can effectively promote thermal management applications level, and the small space temperature in inside and hot-fluid for being widely used in different temperatures region are surveyed
Amount demand especially meets the temperature and heat flux measurement of inside battery.
Detailed description of the invention
Fig. 1 is temperature measuring principle schematic diagram of the invention.
Fig. 2 is system principle schematic diagram of the invention.
In figure: 1- thermoelectric element, 2- battery cell A, 3- battery cell B, 4- ammeter, 5- voltmeter, 6- controller, 7-
Switch.
Specific embodiment
In order to be more clear the objectives, technical solutions, and advantages of the present invention, with reference to the accompanying drawings and embodiments, to this hair
It is bright to be further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used to
Limit the present invention.
The factors such as temperature, hot-fluid in battery are an important factor for influencing battery performance and service life.The present invention is used for battery
The temperature and heat flux measurement of group internal cell monomer.Technical principle based on thermoelectric effect, as shown in Fig. 2, system includes heat
Electric device 1, battery cell A2, battery cell B3, ammeter 4, voltmeter 5, controller 6 and switch 7, battery cell A2 and battery
Monomer B3 selects the cuboid battery cell of 2.6Ah as thermometric object A and thermometric object B, and thermoelectric element 1 is TEC1-
12706 semiconductor refrigerating elements, are placed on inside battery, are between battery cell A2 and battery cell B3, and good heat connects
Touching, ammeter 4 and voltmeter 5 respectively obtain the closed current and open-circuit voltage of 1 electrical circuit of thermoelectric element.Controller 6 stores pre-
Under the different temperatures first tested under the temperature difference of thermoelectric element 1 and voltage relationship, different temperatures thermoelectric element 1 thermal resistance
Value, the thermoelectric figure of merit Z of thermoelectric element 1 and thermoelectric element 1 and electricity under the resistance value and different temperatures of thermoelectric element 1 under different temperatures
The thermal contact resistance value of pond monomer A2 and battery cell B3, the relational computation algorithm of aforementioned present invention technical principle built in controller 6,
Switch 2 is electronic commutator, the closed state of 6 control switch 7 of controller.
Using above-mentioned temperature measurement system realize thermometry and step based on thermoelectric effect, first, measurement
The open-circuit voltage and short circuit current of thermoelectric element 1, and it is transferred to controller 6；Second, controller 6 is according to aforementioned present invention technology
The mean temperature of thermoelectric element 1 is calculated in the related algorithm of principle；Third, controller 6 is according to the warm under current mean temperature
The temperature difference and voltage relationship of 1 both ends of the surface of electric device obtain the temperature of 1 both ends of the surface of thermoelectric element by the open-circuit voltage of thermoelectric element 1
It is poor to spend；4th, controller 6 passes through the temperature difference and thermal resistance value of 1 both ends of the surface of thermoelectric element, and stream is calculated according to Fourier law
Cross the hot-fluid of thermoelectric element 1；5th, controller 6 is according to the temperature of 1 both ends of the surface of mean temperature and thermoelectric element of thermoelectric element 1
Difference, is calculated the cold end face of thermoelectric element 1 and the temperature in hot end face, so according to thermal contact resistance value obtain battery cell A2 and
The surface temperature of battery cell B3.
Under the conditions of the surface temperature of measured battery monomer A2 and battery cell B3 are respectively 310.58 DEG C and 299.63 DEG C,
The surface temperature of the battery cell A2 and battery cell B3 that test through the above method are respectively 307.74 DEG C and 301.04 DEG C,
Error is in ± 1%.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (5)
1. a kind of surface temperature measurement method based on thermoelectric effect, which is characterized in that thermoelectric element (1) is in thermometric object
A(2) and thermometric object B(3) between, and well thermally contact, ammeter (4) and voltmeter (5) measure obtain the thermoelectricity respectively
The short circuit current and open-circuit voltage of element (1) electrical circuit, first, experiment obtains the thermoelectric element (1) both ends of the surface not in advance
Synthermal temperature difference and voltage relationship, experiment in advance obtains the resistance value of the different temperatures of the thermoelectric element (1), real in advance
It tests to obtain the thermal resistance value of the different temperatures of the thermoelectric element (1), experiment obtains the different temperatures of the thermoelectric element (1) in advance
Thermoelectric figure of merit Z, be previously obtained the thermoelectric element (1) and the thermometric object A(2) and the thermometric object B(3) contact
Thermal resistance value, above-mentioned relation and parameter value are recycled and reused for temperature taking process；Second, measure the open circuit electricity of the thermoelectric element (1)
Pressure and short circuit current；Third, according to formula
In formulaV oFor open-circuit voltage,I sFor short circuit current,RIt is the thermoelectric element (1) for resistance, the Z of the thermoelectric element (1)
Thermoelectric figure of merit,For the average temperature value of the thermoelectric element (1)；
The mean temperature of the thermoelectric element (1) is calculated；4th, according to the temperature difference of the thermoelectric element (1) both ends of the surface
And voltage relationship, the temperature difference of the thermoelectric element (1) both ends of the surface is obtained by the open-circuit voltage of the thermoelectric element (1)；5th,
According to the temperature difference of the mean temperature of the thermoelectric element (1) and the thermoelectric element (1) both ends of the surface, the thermoelectricity is calculated
The cold end face of element (1) and the temperature in hot end face, and then obtain the thermometric object A(2) and the thermometric object B(3) table
Face temperature；6th, by obtaining the thermal resistance value of the thermoelectric element (1) in advance, according to the temperature of the thermoelectric element (1) both ends of the surface
Degree difference and voltage relationship obtain the temperature difference of the thermoelectric element (1) both ends of the surface, and stream then is calculated according to Fourier law
Cross the hot-fluid of the thermoelectric element (1).
2. the surface temperature measurement method according to claim 1 based on thermoelectric effect, which is characterized in that the thermoelectricity
Element (1) is Commercial semiconductors refrigeration module.
3. the surface temperature measurement method according to claim 1 based on thermoelectric effect, which is characterized in that the thermoelectricity
Element (1) is thin film thermoelectric element.
4. the surface temperature measurement method according to claim 1 based on thermoelectric effect, which is characterized in that the thermoelectricity
Element (1) is the shapes such as rectangular, round, triangle, polygon and irregular figure, is wanted according to the structure snd size of measurand
It asks and is customized and matches.
5. the surface temperature measurement method according to claim 1 based on thermoelectric effect, which is characterized in that the thermoelectricity
Element (1) can select the material of different figure of merit Z values, and change the parameters such as the brachium of p-type and N-type element, sectional area into
Row customization.
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| CN201910799448.7A CN110375871B (en) | 2019-08-28 | 2019-08-28 | Surface temperature measuring method based on thermoelectric effect |
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| CN110375871B CN110375871B (en) | 2020-09-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112504515A (en) * | 2020-11-11 | 2021-03-16 | 中国科学院合肥物质科学研究院 | Measuring method for heat flux density distribution based on protruding thermocouple |
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| JPH08178809A (en) * | 1994-12-27 | 1996-07-12 | Jeol Ltd | Sample holder of heated sample analyzer |
| CN102288641A (en) * | 2011-08-18 | 2011-12-21 | 中国飞机强度研究所 | Method for measuring high temperature thermal conductivity coefficient |
| CN102297877A (en) * | 2011-05-27 | 2011-12-28 | 上海大学 | Device and method for measuring thermoelectric parameters of film |
| CN102914560A (en) * | 2012-10-16 | 2013-02-06 | 上海大学 | Device and method for measuring film thermoelectric performance parameters |
| RU2577389C1 (en) * | 2015-01-27 | 2016-03-20 | Геннадий Гюсамович Громов | Method of calibrating thermoelectric heat flux sensors |
| CN109582065A (en) * | 2019-01-23 | 2019-04-05 | 青岛大学 | Temprature control method based on thermoelectric effect |
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2019
- 2019-08-28 CN CN201910799448.7A patent/CN110375871B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08178809A (en) * | 1994-12-27 | 1996-07-12 | Jeol Ltd | Sample holder of heated sample analyzer |
| CN102297877A (en) * | 2011-05-27 | 2011-12-28 | 上海大学 | Device and method for measuring thermoelectric parameters of film |
| CN102288641A (en) * | 2011-08-18 | 2011-12-21 | 中国飞机强度研究所 | Method for measuring high temperature thermal conductivity coefficient |
| CN102914560A (en) * | 2012-10-16 | 2013-02-06 | 上海大学 | Device and method for measuring film thermoelectric performance parameters |
| RU2577389C1 (en) * | 2015-01-27 | 2016-03-20 | Геннадий Гюсамович Громов | Method of calibrating thermoelectric heat flux sensors |
| CN109582065A (en) * | 2019-01-23 | 2019-04-05 | 青岛大学 | Temprature control method based on thermoelectric effect |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112504515A (en) * | 2020-11-11 | 2021-03-16 | 中国科学院合肥物质科学研究院 | Measuring method for heat flux density distribution based on protruding thermocouple |
| CN112504515B (en) * | 2020-11-11 | 2022-05-31 | 中国科学院合肥物质科学研究院 | Measuring method for heat flux density distribution based on protruding thermocouple |
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Address after: 266071 No. 7 East Hongkong Road, Laoshan District, Shandong, Qingdao Patentee after: QINGDAO University Address before: 266071 Shandong city of Qingdao province Ningxia City Road No. 308 Patentee before: QINGDAO University |
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Granted publication date: 20200908 Termination date: 20210828 |