CN107192734A - The sensor and its test device of a kind of utilization Adsorbent By Using Transient Plane Source Technique test rock mass thermal conductivity - Google Patents
The sensor and its test device of a kind of utilization Adsorbent By Using Transient Plane Source Technique test rock mass thermal conductivity Download PDFInfo
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- CN107192734A CN107192734A CN201710047390.1A CN201710047390A CN107192734A CN 107192734 A CN107192734 A CN 107192734A CN 201710047390 A CN201710047390 A CN 201710047390A CN 107192734 A CN107192734 A CN 107192734A
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- 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
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Abstract
The invention discloses a kind of sensor of utilization Adsorbent By Using Transient Plane Source Technique test rock mass thermal conductivity and its test device, the probe of sensor includes being etched into double-stranded conductive nickel foil, radius is between 6 7mm, and sensor uses pi film, and sensor thickness is between 60 μm and 25 μm.Test device includes circular testing stand, rock sample mounting table, adjusting screw, fixed plate, fixed screw and sensor；The circular testing stand center is provided with rock sample mounting table, connected between mounting table and circular testing stand by adjusting screw, circular rock sample is placed with rock sample mounting table, circular rock sample is made up of two increments, the sensor is located between two increments, and sensor is connected by data wire with computer.The device can fast and effectively test the thermal conductivity of rock salt, a kind of convenient and accurate test method be provided for the indoor test of rock mass macroscopic property, to the research of shallow-layer hot-fluid and energy pile engineering practice important in inhibiting.
Description
Technical field
The present invention relates to a kind of sensor of utilization Adsorbent By Using Transient Plane Source Technique test rock mass thermal conductivity and its test device, category
The laboratory test testing element and device of the soil body effectively can be accurately obtained in Geotechnical Engineering field.
Background technology
Adsorbent By Using Transient Plane Source Technique is a kind of transient temperature produced based on Infinite medium PULSE HEATING disk formation thermal source
Response, then obtains material thermal conductivity by recording and being fitted temperature rise and sonde response time relationship, and then calculated by formula
Experimental method, available for solve thermal technology's journey in Material Thermodynamics property analysis.Adsorbent By Using Transient Plane Source Technique is by heat-pole method and the torrid zone
Method is developed, and has merged the advantage of heat-pole method and Hot-strip Method, and hot line is changed over into double-stranded flat heat source, made
Sample is multiplied with probe contacts area, and reduction contacts thermal resistance, and then obtains the sensitivity of test value and accuracy
Very big raising.And its is applied widely, the thermal physical property parameter such as colloid, liquid can be measured, progressively as thermodynamics
The method of testing of favor is enjoyed in testing.
Bulk thermal conductivity constants are a very important parameters in Geotechnical Engineering, and it is to determine superficial layer ground body thermo mechanical property
Basis.The size of top layer Rock And Soil thermal conductivity not only decides the distribution mode in shallow underground temperature field, also determine heat pump
The core of power is calculated, is to influence the key factor of ground source heat pump project investment and energy consumption.Current use for laboratory is in test rock mass
The method of macroscopic property is mainly heat-pole method and Hot-strip Method, and because its contact area is small, thermal resistance is big so that test result is inadequate
It is sensitive and accurate.
Adsorbent By Using Transient Plane Source Technique is applied in the test of rock mass macroscopic property by the present invention, proposes that one kind can test rock mass heat
The sensor and its test device of conductance, efficiently and effectively laboratory test is provided for the determination of relevant design parameter in Geotechnical Engineering
Assay method.
The content of the invention
The present invention seeks to for the existing indoor rock mass macroscopic property tester defect in the country, propose that one kind utilizes wink
The sensor and its test device of state plane heat resource method test rock mass thermal conductivity.
The technical solution adopted by the present invention is：A kind of utilization Adsorbent By Using Transient Plane Source Technique tests the sensor of rock mass thermal conductivity,
The probe of the sensor includes being etched into double-stranded conductive nickel foil, and radius is between 6-7mm, and sensor uses poly- Asia
Amide film, sensor thickness is between 60 μm and 25 μm.
A kind of test device of use the sensor, including circular testing stand, rock sample mounting table, adjusting screw, fixation
Plate, fixed screw and sensor；The circular testing stand center is provided with rock sample mounting table, between mounting table and circular testing stand
Connected by adjusting screw, circular rock sample is placed with rock sample mounting table, the fixed plate is rigidly attached to circular testing stand
Top, fixed plate center is provided with fixed screw, and the bottom of fixed screw is located on circular rock sample, and is fixed；It is described
Circular rock sample is made up of two increments, and the sensor is located between two increments, and sensor is connected by data wire with computer.
Inventive sensor must be recorded and sent after thermal pulse, using the change in electric of computer record sensor, to electricity
Rock sample thermal response curve is obtained after signal transacting and then rock sample thermal conductivity is derived.
Preferably, described circular testing stand a diameter of 80mm, a diameter of 50mm of rock sample mounting table.
The stabilization of rock sample, ensure that using the sensor of significantly thinner than rock sample thickness during stable testing stand guarantee test
Test will not be applied by dimensional effect, and the method for testing based on Adsorbent By Using Transient Plane Source Technique ensure that the sensitivity of test result
And accuracy.
In transient state flat heat source nickel foil sensor, the relationship expression of its resistance and temperature is as follows：
In formula, R0Resistance before being heated for sensor, α is temperature-coefficient of electrical resistance (TCR)；ΔTiInsulated for sensor thin
The temperature difference of layer.ΔTave(τ) is that sample surfaces insulating barrier another side is raised with the temperature in face of sensor face.
Beneficial effect：Bulk thermal conductivity constants are a very important parameters in Geotechnical Engineering, and it is to determine shallow rock soil body
The basis of thermodynamic property.The size of top layer Rock And Soil thermal conductivity not only decides the distribution mode of shallow earth, also determines
The core that heat pump calculates power, is to influence the key factor of ground source heat pump project investment and energy consumption.Current use for laboratory is in survey
The method of examination rock mass macroscopic property is mainly heat-pole method and Hot-strip Method, and because its contact area is small, thermal resistance is big so that test knot
Fruit is not sensitive enough and accurate.Adsorbent By Using Transient Plane Source Technique is applied in the test of rock mass macroscopic property by the present invention, proposes that one kind can
The sensor and its test device of rock mass thermal conductivity are tested, provides effective and rapid for the determination of relevant design parameter in Geotechnical Engineering
Laboratory test assay method.
Brief description of the drawings
Fig. 1 is transient state flat heat source sensor；
Fig. 2 is rock mass bulk thermal conductivity constants test device schematic diagram.
Embodiment
As shown in figure 1, a kind of utilization Adsorbent By Using Transient Plane Source Technique tests the sensor of rock mass thermal conductivity, the spy of the sensor
Head includes being etched into double-stranded conductive nickel foil, and radius is between 6-7mm, and sensor uses pi film, sensing
Device thickness is between 60 μm and 25 μm.
As shown in Fig. 2 a kind of test device of use the sensor, including circular testing stand 1, rock sample mounting table 2, tune
School screw 3, fixed plate 4, fixed screw 5 and sensor 6；The center of circular testing stand 1 is provided with rock sample mounting table 2, places
Connected between platform 2 and circular testing stand 1 by adjusting screw 3, circular rock sample 8, the fixed plate are placed with rock sample mounting table 2
4 are rigidly attached to the top of circular testing stand 1, and the center of fixed plate 4 is provided with fixed screw 5, and the bottom of fixed screw 5 is set
On circular rock sample 8, and it is fixed；The circular rock sample 8 is made up of two increments, and the sensor 6 is located at two increments
Between, sensor 6 is connected by data wire 7 with computer.The described a diameter of 80mm of circular testing stand 1, the rock sample mounting table 2
A diameter of 50mm.
Inventive sensor must be recorded and sent after thermal pulse, using the change in electric of computer record sensor, to electricity
Rock sample thermal response curve is obtained after signal transacting and then rock sample thermal conductivity is derived.
Test rock sample is cut out into two increments, and respectively used a mirror polish of increment to test.Pass through adjustment spiral shell
Silk makes after mounting table level, and sensor is clipped in two increment burnishing surfaces and forms sandwich structure and is placed on mounting table,
Rock sample is fixed by the fixed screw at fixed plate center, and somewhat applying pressure enables rock sample burnishing surface and sensor contacts tight
It is close, then switch on power in sensor, apply after transient state thermal pulse, use the computer record sensor telecommunications being connected with sensor
Number.
By software processing electric signal and the relation of temperature, and the relationship of the two curve is made, measure the slope of curve further
Calculate, acquired results are material thermal conductivity, the result obtained by the calculating of this test method is more accurate compared with other method.According to biography
Relational expression between sensor resistance and temperature change：
In formula, R0Resistance before being heated for sensor, α is temperature-coefficient of electrical resistance (TCR)；ΔTiInsulated for sensor thin
The temperature difference of layer.ΔTave(τ) is that sample surfaces insulating barrier another side is raised with the temperature in face of sensor face.Pass through fortune
Calculation obtains Δ Tave(τ) is straight line with D (τ) change curve, and its intercept is Δ Ti, and slope isWherein, a is
Probe radius, λ is rock sample thermal conductivity, and D (τ) is nondimensional time function.
It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention,
Some improvements and modifications can also be made, these improvements and modifications also should be regarded as protection scope of the present invention.In the present embodiment not
Clear and definite each part can use prior art to be realized.
Claims (3)
1. a kind of utilization Adsorbent By Using Transient Plane Source Technique tests the sensor of rock mass thermal conductivity, it is characterised in that：The spy of the sensor
Head includes being etched into double-stranded conductive nickel foil, and radius is between 6-7mm, and sensor uses pi film, sensing
Device thickness is between 60 μm and 25 μm.
2. the test device of the sensor of rock mass thermal conductivity is tested in a kind of usage right requirement 1 using Adsorbent By Using Transient Plane Source Technique, its
It is characterised by：Including circular testing stand, rock sample mounting table, adjusting screw, fixed plate, fixed screw and sensor；The circle
Testing stand center is provided with rock sample mounting table, is connected between mounting table and circular testing stand by adjusting screw, rock sample mounting table
On be placed with circular rock sample, the fixed plate is rigidly attached to the top of circular testing stand, and fixed plate center is provided with fixed spiral shell
Silk, the bottom of fixed screw is located on circular rock sample, and is fixed；The circular rock sample is made up of two increments, described
Sensor is located between two increments, and sensor is connected by data wire with computer.
3. utilization Adsorbent By Using Transient Plane Source Technique according to claim 2 tests the test device of rock mass thermal conductivity, its feature exists
In：Described circular testing stand a diameter of 80mm, a diameter of 50mm of rock sample mounting table.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710047390.1A CN107192734A (en) | 2017-01-22 | 2017-01-22 | The sensor and its test device of a kind of utilization Adsorbent By Using Transient Plane Source Technique test rock mass thermal conductivity |
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| CN201710047390.1A CN107192734A (en) | 2017-01-22 | 2017-01-22 | The sensor and its test device of a kind of utilization Adsorbent By Using Transient Plane Source Technique test rock mass thermal conductivity |
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| CN107192734A true CN107192734A (en) | 2017-09-22 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169278A (en) * | 2017-11-30 | 2018-06-15 | 山东大学 | A kind of hot physical property probe |
| CN108562610A (en) * | 2018-03-13 | 2018-09-21 | 中国石油天然气股份有限公司 | A kind of method and system of determining thermal conductivity of rocks |
| CN109324080A (en) * | 2018-05-23 | 2019-02-12 | 华侨大学 | The measuring device and measuring method of sandwich style fire-proof board thermal coefficient |
| CN109540961A (en) * | 2018-11-06 | 2019-03-29 | 清华大学深圳研究生院 | Measure the method, apparatus and thermal sensor of thermal parameters |
| CN117607200A (en) * | 2023-11-09 | 2024-02-27 | 南京大学 | Soil nail defect parameter detection device and method based on active heating optical fiber sensing |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169278A (en) * | 2017-11-30 | 2018-06-15 | 山东大学 | A kind of hot physical property probe |
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| CN108562610A (en) * | 2018-03-13 | 2018-09-21 | 中国石油天然气股份有限公司 | A kind of method and system of determining thermal conductivity of rocks |
| CN108562610B (en) * | 2018-03-13 | 2021-11-02 | 中国石油天然气股份有限公司 | Method and system for determining rock thermal conductivity |
| CN109324080A (en) * | 2018-05-23 | 2019-02-12 | 华侨大学 | The measuring device and measuring method of sandwich style fire-proof board thermal coefficient |
| CN109540961A (en) * | 2018-11-06 | 2019-03-29 | 清华大学深圳研究生院 | Measure the method, apparatus and thermal sensor of thermal parameters |
| CN117607200A (en) * | 2023-11-09 | 2024-02-27 | 南京大学 | Soil nail defect parameter detection device and method based on active heating optical fiber sensing |
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Application publication date: 20170922 |
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