CN111610224A - Data processing method for transient measurement of thermophysical properties of material by hot-wire method - Google Patents
Data processing method for transient measurement of thermophysical properties of material by hot-wire method Download PDFInfo
- Publication number
- CN111610224A CN111610224A CN202010519246.5A CN202010519246A CN111610224A CN 111610224 A CN111610224 A CN 111610224A CN 202010519246 A CN202010519246 A CN 202010519246A CN 111610224 A CN111610224 A CN 111610224A
- Authority
- CN
- China
- Prior art keywords
- hot
- formula
- wire
- thermal
- thermophysical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
Abstract
The invention discloses a data processing method for transient measurement of thermophysical properties of a material by a hot wire method, which better reflects the objective rule of transient measurement of the thermophysical properties of the material by correcting a calculation formula of heat conductivity lambda and a heat diffusion coefficient a in the method and accurately obtains the measured values of the heat conductivity, the heat diffusion coefficient, the constant pressure specific heat capacity and the heat storage coefficient.
Description
Technical Field
The invention belongs to the field of thermal and heat transfer science, and relates to a method for measuring thermophysical properties of a material.
Background
The general principle of transient measurement of the thermophysical properties of the material by the hot wire method is that the temperature change rule of the contact interface between the surface of the hot wire and the medium in the heating and temperature rising process in the measuring device is as follows
In the formula, slope
Intercept of a beam
Areal density of heat flow
Where I represents the current passing in the hot wire, in units: ampere; r is the resistance of the hot wire, unit: ohm; r is0Is the hot wire radius, in units: rice; l is the hot wire length, unit: and (4) rice.
Since equation (1) is a standard linear equation. Therefore, only one set of measuring device is developed, and a series of ln tau can be measured by adopting an experimental methodiAnd thetai(r0,τi) Linear fitting can be carried out by using a least square method, the slope k and the intercept D of a fitting straight line are calculated and substituted into the formulas (2) and (3), and the calculation formula of the thermal conductivity lambda of the material to be measured in the hot-wire method transient measurement can be immediately obtained as
Meanwhile, the calculation formula of the thermal diffusion coefficient a can be obtained as
Using the above formulas, transient measurements of the thermophysical properties of the materials appear to be achievable using the hot wire method.
However, this is far from the practical point that when a measuring device is developed for use in actual measurement, the applicant notes that: the measured value of the thermal conductivity obtained by measurement is far greater than the accepted value of the thermal conductivity of the material, and even the difference is of an order of magnitude. Why is this? This is the first difficulty encountered and needs to be treated carefully to be solved.
In addition, the applicant has also noted that: the measured thermal diffusivity is also an order of magnitude smaller, not in accordance with accepted values for the thermal diffusivity of materials.
Furthermore, when the measured values of the thermal conductivity and the thermal diffusivity obtained above are used to calculate the specific heat capacity at constant pressure of the material, the calculated value is an order of magnitude larger than the recognized value.
This series of problems shows the fact that: it seems that the general theory of the thermal-physical property of the material measured by the hot-wire method transient state established by directly applying the one-dimensional cylindrical surface heat transfer model and the derived calculation formula can not be directly used for the data calculation of the thermal-physical property of the material measured by the hot-wire method transient state.
Thus, the applicant is faced with two options, namely either abandoning the general theory of transient measurement of the thermophysical property of the material by the hot-wire method established according to the one-dimensional cylindrical surface heat transfer theory or modifying the calculation formula of the transient measurement of the thermophysical property of the material by the hot-wire method so as to enable the thermal conductivity and the thermal diffusivity of the material to be suitable for transient measurement. That is, if we want to continue to use the one-dimensional cylindrical surface heat transfer model to measure the thermophysical properties of the material in the hot-wire transient state, we have to modify equations (5) and (6) and explore new equations for transient measurement of thermal conductivity and thermal diffusivity calculation, so that we can more accurately measure the thermophysical properties of the material by reflecting the objective law of transient measurement of thermophysical properties of the material.
Disclosure of Invention
Aiming at the problems, through careful research and repeated verification, the inventor finds a new mathematical model for solving the thermal conductivity and the thermal diffusion coefficient, further perfects the theory and the method for transient measurement of the thermophysical properties of the material by a hot-wire method, and adopts the technical scheme that:
a data processing method for transient measurement of thermophysical properties of a material by a hot-wire method comprises the following steps:
first, preparation step
1) Manufacturing a standard sample of the material to be tested, wherein the sample is two homogeneous cube samples;
2) manufacturing a set of measuring instrument, wherein the measuring instrument comprises a probe, a current-stabilizing power supply, a data acquisition unit and a data processor;
3) establishing a physical mathematical model for solving the thermophysical parameters of the material, compiling a software program according to the physical mathematical model, writing out codes and storing the codes into a measuring instrument;
second, measurement step
1) Clamping the probe between the two samples to make the hot wire stick to the central axis of the sample plane of the standard sample;
2) introducing constant current to the probe;
3) the probe sends the detected temperature signal to the data acquisition unit, and the data acquisition unit converts the temperature signal into a corresponding digital signal;
4) the data processor runs a software program to calculate and process the digital signal to obtain the value of the thermophysical parameter;
the method is characterized in that the physical mathematical model for solving the thermophysical parameters of the material is based on a primary integral expression of an accurate solution of a one-dimensional cylindrical surface heat transfer problem, and the temperature change rule at the contact interface of the hot wire surface and a medium is as follows in the heating and warming process:
in the formula, slope
Intercept of a beam
Areal density of heat flow
Where I represents the current passing in the hot wire, in units: ampere; r is the resistance of the hot wire, unit: ohm; r is0Is the hot wire radius, in units: rice; l is the hot wire length, unit: and (4) rice.
Measuring a series of measurements by experimental methodsLn τ of (2)iAnd thetai(r0,τi) Linear fitting is carried out by using a least square rule, the slope k and the intercept D of a fitting straight line are calculated and substituted into the formulas (2) and (3), and then the formula (4) is substituted, so that the calculation formula for obtaining the thermal conductivity lambda of the material to be measured by the hot-wire method transient measurement is shown as
The thermal diffusion coefficient a is calculated by the formula
As can be seen from the above equation (5), the main factor causing the thermal conductivity λ to become larger in magnitude is the heat ray radius too small, generally 10-4Magnitude. If remove 2 π r0This factor, equation (5) will be reduced to
Changing from equation (5) to equation (7) by removing a constant factor of 2 π r0The concept of the heat flux density is changed from the heat flux surface density to the heat flux linear density, and the change does not change the physical meaning of the formula; but the magnitude relation of the calculation formula is adjusted, so that the magnitude of the transient measurement thermal conductivity of the hot wire method is not increased, and the physical meaning of the calculation formula is kept unchanged; just as such, it is reasonable and reliable that formula (5) becomes formula (7); therefore, when the thermophysical property of the material is measured in a hot-wire transient manner by using the one-dimensional cylindrical surface heat transfer model, the formula (7) can be used as a calculation formula of the thermal conductivity without any ambiguity.
Since the calculation formula of the thermal conductivity lambda adopts the concept of linear energy flow density, the calculation formula of the thermal diffusivity a needs to be changed correspondingly in order to keep the consistency of the thermal conductivity lambda. The definition of the intercept from the linear fit can be derived as follows: by
The above formula can be rewritten as
Then there are
Solving a from the above formula to obtain a calculation formula of the thermal diffusion coefficient a
In the above formula, when the heat ray radius is small, r is considered to be0→ 0. Then it must have
Thus is provided with
This is an approximate expression; generally, the value of the hot wire radius ranges from 0.05 mm to 1.0 mm. The error of this approximation, calculated by taking the hot line radius to be 0.1 mm, can be estimated as follows: when the radius of the heat-extracting line is r0When the grain size is 0.0001 m, the grain size is
e0.0001＝2.718280.0001＝1.0001 (13)
It can be seen that the deviation from 1 is only one ten thousandth. Therefore, it is considered that there should be no observable effect in the actual measurement of the thermal diffusivity.
From this analysis, it is considered that when the thermal physical properties of the material are measured transiently by the hot-wire method, the formula for calculating the thermal diffusivity can be used
Coefficient of formula
Thus, the final formula for measuring the thermal diffusivity in a transient manner by the hot-wire method is obtained as
Where k is the slope of the fitted line and D is the intercept of the fitted line.
The method has the beneficial effects that:
by correcting the calculation formula of the thermal conductivity lambda and the thermal diffusion coefficient a in the method, the objective rule of transient measurement of the thermophysical property of the material can be reflected, the measurement precision is improved, and the related parameter values of the thermophysical property of the material, such as the thermal conductivity, the thermal diffusion coefficient, the constant pressure specific heat capacity and the heat storage coefficient, can be measured more accurately.
Detailed Description
A data processing (calculating) method for transient measurement of thermophysical properties of a material by a hot-wire method comprises the following steps:
first, preparation step
1) Manufacturing a standard sample of the material to be tested, wherein the sample is two homogeneous cube samples;
2) manufacturing a set of measuring instrument, wherein the measuring instrument comprises a probe, a current-stabilizing power supply, a data acquisition unit and a data processor;
3) establishing a physical mathematical model for solving the thermophysical parameters of the material, compiling a software program according to the physical mathematical model, writing out codes and storing the codes into a measuring instrument;
second, measurement step
1) Clamping the probe between the two samples to make the hot wire stick to the central axis of the sample plane of the standard sample;
2) introducing constant current to the probe;
3) the probe sends the detected temperature signal to the data acquisition unit, and the data acquisition unit converts the temperature signal into a corresponding digital signal;
4) the data processor runs a software program to calculate and process the digital signal to obtain the value of the thermophysical parameter;
the physical mathematical model for solving the thermophysical parameters of the material is based on a primary integral expression of an accurate solution of a one-dimensional cylindrical surface heat transfer problem, and in the heating and warming process, the temperature change rule at the contact interface of the hot wire surface and the medium is as follows:
in the formula, slope
Intercept of a beam
Areal density of heat flow
Where I represents the current passing in the hot wire, in units: ampere; r is the resistance of the hot wire, unit: ohm; r is0Is the hot wire radius, in units: rice; l is the hot wire length, unit: and (4) rice.
Experimentally, a series of ln τ measurements are obtainediAnd thetai(r0,τi) Linear fitting is carried out by using a least square rule, the slope k and the intercept D of a fitting straight line are calculated and substituted into the formulas (2) and (3), and then the formula (4) is substituted, so that the calculation formula for obtaining the thermal conductivity lambda of the material to be measured by the hot-wire method transient measurement is shown as
The thermal diffusion coefficient a is calculated by the formula
However, when the two formulas (5) and (6) are used for experimental measurement, the measured experimental values are far from the recognized values of the thermal conductivity and the thermal diffusion coefficient of the sample to be measured, and even the difference of the order of magnitude occurs; obviously, the two formulas (5) and (6) cannot be directly used for measuring the thermal conductivity and the thermal diffusivity, and need to be corrected.
As can be seen from the above equation (5), the main factor causing the thermal conductivity λ to become larger in magnitude is the heat ray radius too small, generally 10-4Magnitude. If remove 2 π r0This factor, equation (5) will be reduced to
Changing from equation (5) to equation (7) by removing a constant factor of 2 π r0The concept of the heat flux density is changed from the heat flux surface density to the heat flux linear density, and the change does not change the physical meaning of the formula; but the magnitude relation of the calculation formula is adjusted, so that the magnitude of the transient measurement thermal conductivity of the hot wire method is not increased, and the physical meaning of the calculation formula is kept unchanged; just as such, it is reasonable and reliable that formula (5) becomes formula (7); therefore, when the thermophysical property of the material is measured in a hot-wire transient mode by using a one-dimensional cylindrical surface heat transfer model, the formula (7) can be used as a calculation formula of the heat conductivity, and no ambiguity is caused.
Since the calculation formula of the thermal conductivity lambda adopts the concept of linear energy flow density, the calculation formula of the thermal diffusivity a needs to be changed correspondingly in order to keep the consistency of the thermal conductivity lambda. The definition of the intercept from the linear fit can be derived as follows: by
The above formula can be rewritten as
Then there are
Solving a from the above formula to obtain a calculation formula of the thermal diffusion coefficient a
In the above formula, when the heat ray radius is small, r is considered to be0→ 0. Then it must have
Thus is provided with
This is an approximate expression. Generally, the value of the hot wire radius ranges from 0.05 mm to 1.0 mm. The error of this approximation, calculated by taking the hot line radius to be 0.1 mm, can be estimated as follows: when the radius of the heat-extracting line is r0When the grain size is 0.0001 m, the grain size is
e0.0001＝2.718280.0001＝1.0001 (13)
It can be seen that the deviation from 1 is only one ten thousandth. Therefore, it is considered that there should be no observable effect in the actual measurement of the thermal diffusivity.
From this analysis, it is considered that when the thermal physical properties of the material are measured transiently by the hot-wire method, the formula for calculating the thermal diffusivity can be used
Coefficient of formula
Thus, the applicant obtained the final formula for measuring the thermal diffusivity using the hot-wire method transient as
Where k is the slope of the fitted line and D is the intercept of the fitted line.
It should be noted that, in the above analysis, the formula (11) has a general meaning. (16) Formula (iii) is just a specific example. Only if it meets specific conditions.
Through the demonstration, the conclusion can be drawn that the established general theory of transient measurement of the thermophysical properties of the material by the hot wire method is accurate according to the one-dimensional cylindrical surface heat transfer theory. However, if this theory is used to practice the measurement, the concept of the thermal streamline density must be applied. And the calculation formula of the thermal conductivity is changed into the formula (7); meanwhile, the calculation formula of the thermal diffusivity must be changed to the formula (11).
When a specific condition is satisfied, the calculation may be performed by expression (16). The data processing method is firstly proposed by the inventor of the present application in the research process, and can be called as Chen's algorithm. When the method is adopted to process the measured data, the measured values of the thermal conductivity and the thermal diffusion coefficient of the material can be ensured to be correct, and the coordination and consistency of the transient measured values of the specific heat capacity at constant pressure and the thermal storage coefficient can also be ensured to be correct.
In this way, it can be concluded that: one set of final calculation formulas for transient measurement of the thermophysical properties of the material by the hot-wire method is as follows:
calculation formula of thermal conductivity
Calculation formula of thermal diffusion coefficient
When a specific condition is satisfied, the calculation may be performed by the expression (16)
According to the definition formula of the thermal diffusion coefficient, after the thermal conductivity and the thermal diffusion coefficient are measured, if the density of the material to be measured is known (or measured), the constant pressure specific heat capacity of the material to be measured can be measured
After measuring the thermal conductivity and the thermal diffusivity, if the thermal action period T is knownhThe heat storage coefficient of the material to be measured can be measured (unit in seconds)
Therefore, the measurement of thermophysical parameters of the material to be measured, such as thermal conductivity, thermal diffusion coefficient, constant-pressure specific heat capacity, heat storage coefficient and the like, by adopting hot wire transient measurement is realized.
The above algorithm, having obtained a verification of the practical measurements, is reliable.
Claims (3)
1. A data processing method for transient measurement of thermophysical properties of a material by a hot-wire method comprises the following steps:
first, preparation step
1) Manufacturing a sample of a material to be detected, wherein the sample is two cuboid samples;
2) manufacturing a set of measuring instrument, wherein the measuring instrument comprises a probe, a current-stabilizing power supply, a data acquisition unit and a data processor;
3) establishing a physical mathematical model for solving the thermophysical parameters of the material, compiling a software program according to the physical mathematical model, writing out codes and storing the codes into a measuring instrument;
second, measurement step
1) Clamping the probe between the two samples to make the hot line joint with the central axis of the sample plane;
2) introducing constant current to the probe;
3) the probe sends the detected temperature signal to the data acquisition unit, and the data acquisition unit converts the temperature signal into a corresponding digital signal;
4) the data processor runs a software program to calculate and process the digital signal to obtain the value of the thermophysical parameter;
the method is characterized in that the physical mathematical model for solving the thermophysical parameters of the material is based on a primary integral expression of an accurate solution of a one-dimensional cylindrical surface heat transfer problem, and the temperature change rule at the contact interface of the hot wire surface and a medium is as follows in the heating and warming process:
in the formula, slope
Intercept of a beam
Heat flux areal density of hot wire surface
Where I represents the current passing in the hot wire, in units: ampere; r is the resistance of the hot wire, unit: ohm; r is0Is the hot wire radius, in units: rice; l is the hot wire length, unit: rice;
experimentally, a series of ln τ measurements are obtainediAnd thetai(r0,τi) Linear fitting is carried out by using a least square rule, the slope k and the intercept D of a fitting straight line are calculated and substituted into the formulas (2) and (3), and then the formula (4) is substituted, so that the calculation formula for obtaining the thermal conductivity lambda of the material to be measured by the hot-wire method transient measurement is shown as
The thermal diffusion coefficient a is calculated by the formula
As can be seen from the observation of equation (5), the main factor that causes the magnitude of the thermal conductivity λ measurement to become large is that the hot wire radius is too small, typically at 10-4Magnitude; if remove 2 π r0This factor, equation (5) will be reduced to
Changing from equation (5) to equation (7) by removing a constant factor of 2 π r0The concept of heat flux density of the electrified heating is changed from heat flux surface density to heat flux linear density, and the change does not change the physical meaning of the formula; but the magnitude relation of the calculation formula is adjusted, so that the magnitude of the transient measurement thermal conductivity of the hot wire method is not increased, and the physical meaning of the calculation formula is kept unchanged; just as such, it is reasonable and reliable that formula (5) becomes formula (7); therefore, when the thermophysical property of the material is measured in a hot-wire method transient state by using the one-dimensional cylindrical surface heat transfer model, the formula (7) is used as a calculation formula of the heat conductivity, and no ambiguity occurs;
because the calculation formula of the thermal conductivity lambda adopts the concept of linear energy flow density, the calculation formula of the thermal diffusion coefficient a needs to be changed correspondingly in order to keep the consistency of the thermal conductivity lambda; the definition of the intercept from the linear fit can be derived as follows: by
The above formula is rewritten as
Then there are
Solving a from the above formula to obtain a calculation formula of the thermal diffusion coefficient a
2. The method for processing data on thermophysical properties of a material measured in a transient state by a heat-ray method according to claim 1, wherein r is considered to be r when a radius of a heat ray is small in formula (11)0→ 0; then it must have
Thus is provided with
3. The method for processing data of thermophysical property of a material measured in a transient state by a hot-wire method according to claim 2, wherein the method comprises measuring the thermophysical property of the material by a hot-wire method
Is an approximate expression; generally, the value range of the hot wire radius is between 0.05 and 1.0 millimeter; the error of this approximation, calculated by taking the hot line radius to be 0.1 mm, can be estimated as follows: when the radius of the heat-extracting line is r0When the grain size is 0.0001 m, the grain size is
e0.0001＝2.718280.0001＝1.0001 (13)
It can be seen that the deviation from 1 is only one ten thousandth; therefore, it is considered that, in the actual measurement of the thermal diffusivity, there should be no observable effect;
from this analysis, it is considered that when the thermal physical properties of the material are measured transiently by the hot-wire method, the formula for calculating the thermal diffusivity can be used
Coefficient of formula
Thus, the final formula for measuring the thermal diffusivity in a transient manner by the hot-wire method is obtained as
Where k is the slope of the fitted line and D is the intercept of the fitted line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010519246.5A CN111610224B (en) | 2020-06-09 | 2020-06-09 | Data processing method for transient measurement of thermophysical properties of material by hot-wire method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010519246.5A CN111610224B (en) | 2020-06-09 | 2020-06-09 | Data processing method for transient measurement of thermophysical properties of material by hot-wire method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111610224A true CN111610224A (en) | 2020-09-01 |
| CN111610224B CN111610224B (en) | 2022-06-03 |
Family
ID=72200688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010519246.5A Active CN111610224B (en) | 2020-06-09 | 2020-06-09 | Data processing method for transient measurement of thermophysical properties of material by hot-wire method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111610224B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3940800B2 (en) * | 2003-11-27 | 2007-07-04 | 独立行政法人物質・材料研究機構 | Thermal diffusion coefficient wide-angle single-point measurement using general-purpose nanoscale measurement technology |
| CN102608154A (en) * | 2012-02-14 | 2012-07-25 | 陈昭栋 | System for measuring thermal performance transiently by using pulsing method or constant current method |
| CN202421105U (en) * | 2012-01-18 | 2012-09-05 | 西安建筑科技大学 | Device for measuring thermophysical parameters of asphalt mixture according to transient thermal line method |
| CN102818820A (en) * | 2012-09-11 | 2012-12-12 | 中国科学技术大学 | System for measuring heat conductivity coefficient of nano materials based on vanadium dioxide nano wires |
| CN104280419A (en) * | 2013-07-01 | 2015-01-14 | 北京中建建筑科学研究院有限公司 | Method for testing material heat conductivity coefficient through transient plane heat source method |
| CN106645284A (en) * | 2016-09-23 | 2017-05-10 | 西安交通大学 | Circular-tube material heat conductivity coefficient measuring system and measuring method thereof |
| CN107328810A (en) * | 2017-07-27 | 2017-11-07 | 同济大学 | A kind of anisotropic material thermal conductivity measurements and device based on heat-pole method |
| CN107941850A (en) * | 2017-11-21 | 2018-04-20 | 宁波英飞迈材料科技有限公司 | A kind of apparatus and method of quick measurement thin-film material thermal capacitance |
| CN108152326A (en) * | 2018-01-04 | 2018-06-12 | 北京科技大学 | The measuring device and method that solid material thermal diffusion coefficient varies with temperature |
| CN108614005A (en) * | 2018-04-13 | 2018-10-02 | 南方科技大学 | A kind of test method and system of the thermal physical property parameter based on multilayer materials |
| CN109580708A (en) * | 2018-12-27 | 2019-04-05 | 西南科技大学 | The voltage measurement method of the hot physical property of heat-pole method instantaneous measurement material |
| CN109738485A (en) * | 2019-03-19 | 2019-05-10 | 常州检验检测标准认证研究院 | A kind of measuring device and its method of solid material heat conductivity |
-
2020
- 2020-06-09 CN CN202010519246.5A patent/CN111610224B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3940800B2 (en) * | 2003-11-27 | 2007-07-04 | 独立行政法人物質・材料研究機構 | Thermal diffusion coefficient wide-angle single-point measurement using general-purpose nanoscale measurement technology |
| CN202421105U (en) * | 2012-01-18 | 2012-09-05 | 西安建筑科技大学 | Device for measuring thermophysical parameters of asphalt mixture according to transient thermal line method |
| CN102608154A (en) * | 2012-02-14 | 2012-07-25 | 陈昭栋 | System for measuring thermal performance transiently by using pulsing method or constant current method |
| CN102818820A (en) * | 2012-09-11 | 2012-12-12 | 中国科学技术大学 | System for measuring heat conductivity coefficient of nano materials based on vanadium dioxide nano wires |
| CN104280419A (en) * | 2013-07-01 | 2015-01-14 | 北京中建建筑科学研究院有限公司 | Method for testing material heat conductivity coefficient through transient plane heat source method |
| CN106645284A (en) * | 2016-09-23 | 2017-05-10 | 西安交通大学 | Circular-tube material heat conductivity coefficient measuring system and measuring method thereof |
| CN107328810A (en) * | 2017-07-27 | 2017-11-07 | 同济大学 | A kind of anisotropic material thermal conductivity measurements and device based on heat-pole method |
| CN107941850A (en) * | 2017-11-21 | 2018-04-20 | 宁波英飞迈材料科技有限公司 | A kind of apparatus and method of quick measurement thin-film material thermal capacitance |
| CN108152326A (en) * | 2018-01-04 | 2018-06-12 | 北京科技大学 | The measuring device and method that solid material thermal diffusion coefficient varies with temperature |
| CN108614005A (en) * | 2018-04-13 | 2018-10-02 | 南方科技大学 | A kind of test method and system of the thermal physical property parameter based on multilayer materials |
| CN109580708A (en) * | 2018-12-27 | 2019-04-05 | 西南科技大学 | The voltage measurement method of the hot physical property of heat-pole method instantaneous measurement material |
| CN109738485A (en) * | 2019-03-19 | 2019-05-10 | 常州检验检测标准认证研究院 | A kind of measuring device and its method of solid material heat conductivity |
Non-Patent Citations (5)
| Title |
|---|
| HIDEO WATANABE: "Further examination of the transient hot-wire method for the simultaneous measurement of thermal conductivity and thermal diffusivity", 《METROLOGIA》 * |
| 丰正功: "基于TPS法简化模型测量物质导热系数", 《纳米技术与精密工程》 * |
| 潘江: "瞬态热线法导热系数测量实验数据处理方法的研究", 《计量学报》 * |
| 罗晓琴: "热线法测量材料的热扩散系数和热导率的研究", 《四川师范大学学报( 自然科学版)》 * |
| 赵丽: "瞬态热线法测量导热系数及误差分析", 《计量与测试技术》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111610224B (en) | 2022-06-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101776628B (en) | Heat conductivity measuring device and method | |
| CN108107074A (en) | Characterize the dipulse flash of light Raman method and system of the hot physical property of two-dimension nano materials | |
| CN101788513A (en) | Measurement device of thermal conductivity of materials and method thereof | |
| CN104215660A (en) | Method and system capable of simultaneously testing heat conduction coefficient and heat diffusion rate of solid material | |
| CN111610224B (en) | Data processing method for transient measurement of thermophysical properties of material by hot-wire method | |
| US2924771A (en) | Method and apparatus for identifying metals | |
| Kadjo et al. | A new transient two-wire method for measuring the thermal diffusivity of electrically conducting and highly corrosive liquids using small samples | |
| CN109580708A (en) | The voltage measurement method of the hot physical property of heat-pole method instantaneous measurement material | |
| Matvienko et al. | Increasing accuracy of measuring thermal conductivity of liquids by using the direct heating thermistor method | |
| CN114965567A (en) | High-temperature molten salt fluid heat conductivity coefficient test system | |
| Low et al. | Thermal conductivity of soils by the needle probe method, for energy foundation applications | |
| JP4203893B2 (en) | Method of measuring principal axis thermophysical property value of two-dimensional anisotropic material by heat flow meter type multi-point temperature measurement method and measuring device | |
| JP3246860B2 (en) | Thermal characteristic measuring device and soil moisture content measuring device using the same | |
| CN108627283A (en) | A kind of film thermocouple static characteristic scaling method based on temperature extrapolation method | |
| Mikhal et al. | Experimental evaluation of dynamic properties of the four electrode reference conductivity cells | |
| JP3146357B2 (en) | Precise measurement method of thermal conductivity of liquid material using short-time microgravity environment | |
| RU2785084C1 (en) | Method for determining thermal diffusivity and thermal conductivity coefficient | |
| JP4042816B2 (en) | Moisture content detection sensor | |
| Koshel’ et al. | Determining Conditional Constants of Conductometric Sensors | |
| JPH01201147A (en) | Method and device for measuring heat conductivity and thermistor | |
| Zhou et al. | Study on Temperature Measurement of Petroleum Product Density Analyzer Based on Hydrometer Method | |
| SU834479A1 (en) | Method of material specimen heat transfer coefficient determination | |
| Zheng et al. | 3 ω slope comparative method for fluid and powder thermal conductivity measurements | |
| Kovaleva et al. | A nonstationary method and experimental equipment for measuring the thermal conductivity of heat insulators | |
| Miкhal et al. | Influence of geometric Uncertainties on the Accuracy of calculated constant of the primary conductivity cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |