Multi-directional measuring apparatus and method for thermal conductivity of soil

A measuring device and soil heat technology, applied in the field of soil physics, can solve the problems of large error, inconvenient detection, low accuracy, etc., and achieve the effects of reducing measurement error, easy disassembly, and reducing disturbance

Active Publication Date: 2017-10-20
KUNMING UNIV OF SCI & TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the present invention provides a multi-directional soil thermal conductivity measurement device and method, which is used to solve the problem of existing probe thermal conductivity probes with fixed length and spacing when facing random materials with complex conditions. The limitations caused by the research, as well as the low accuracy and large error when measuring the thermal conductivity of different orientations and depths, and the inconvenient detection of multiple indicators;

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  • Multi-directional measuring apparatus and method for thermal conductivity of soil
  • Multi-directional measuring apparatus and method for thermal conductivity of soil
  • Multi-directional measuring apparatus and method for thermal conductivity of soil

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Embodiment 1

[0047] Embodiment 1: as Figure 1-7 As shown, a multi-directional soil thermal conductivity measurement device includes a temperature sensor probe 1, a probe base 3, a heat pulse probe 4, an internal thread 5, an I-shaped boss 6, an I-shaped chute 7, and a thermoelectric Couple 8, thermal pulse generator 11, handheld controller 33, base plate 34;

[0048] The probe seat 3 has an I-shaped boss 6 on the side, and an I-shaped chute 7 on the adjacent other side, and the central part of the probe seat 3 is an internal thread opening 5;

[0049] The bottom plate 34 is composed of a plurality of probe bases 3, and the I-shaped chute 7 on one side of the probe base 3 is inserted into the I-shaped boss 6 on the side of the other probe base 3. Each probe The size of the seat is the same; the temperature sensor probe 1 and the heat pulse probe 4 of different lengths are selected according to the measured soil depth; respectively through the probe thread fixing rod 2, the probe external ...

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Abstract

The invention relates to a multi-directional measuring apparatus and method for the thermal conductivity of soil, belonging to the technical field of soil physics. The multi-directional measuring apparatus comprises temperature sensor probes, a probe seat, a heat pulse probe, internal thread mouths, I-shaped bosses, I-shaped chutes, thermocouples, a heat pulse generator, a hand-held controller and a base plate. According to the depth of soil, the temperature sensor probes with different lengths and the heat pulse probe are selected, rotationally combined with the internal thread (mouths) in the center of the probe seat via threaded probe-fixing rods and an outer threaded rod for the probe respectively, and connected with the hand-held controller via leads. The measuring method comprises the following steps: equipment combination; reading of configurations; setting of parameters; data acquisition; and calculation of thermal conductivity. The multi-directional measuring apparatus and method can directly read the thermal conductivity of soil on site and reduce disturbance of to-be-detected soil, so unfavorable influence to measurement results caused by changes of a sampling environment is avoided, and the measurement precision of the thermal conductivity of the to-be-detected soil is substantially improved.

Description

technical field [0001] The invention relates to a multi-directional soil thermal conductivity measuring device and method, belonging to the technical field of soil physics. Background technique [0002] Thermal conductivity, also known as "thermal conductivity", reflects the thermal conductivity of materials and is an important physical indicator of thermal characteristics. After the soil absorbs a certain amount of heat, part of it is used to heat itself, and part of it is conducted to its adjacent soil layer. The soil has the ability to transfer the absorbed heat to the adjacent soil layer, which is called thermal conductivity. Its size is expressed by thermal conductivity λ, which represents a soil layer with a thickness of 1 cm. When the temperature difference is 1 °C, the cross-section is 1 cm per second. 2 The number of joules of heat passed, unit: J / CM·S·℃; [0003] At present, soil thermal conductivity measurement methods are divided into steady-state method and un...

Claims

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Application Information

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IPC IPC(8): G01N25/20G01N25/18
CPCG01N25/18G01N25/20
Inventor 王卫华丁砥李建波龙小军程贝谢军张志鹏贾维兵袁鸿猷
Owner KUNMING UNIV OF SCI & TECH
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