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System and method for testing moisture and temperature of soil mass by heat pulse method

A soil temperature, testing system technology, applied in the direction of material thermal conductivity, material water content, etc., can solve the problem of not being able to test the total water content of the soil in the frozen state.

Inactive Publication Date: 2010-07-21
CHANGAN UNIV
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Problems solved by technology

[0002] The existing soil moisture in-situ test technology is mainly the high-frequency electromagnetic wave time-domain reflection test method. The main problem of this method is that it cannot test the total moisture content of the frozen state of the soil.

Method used

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  • System and method for testing moisture and temperature of soil mass by heat pulse method
  • System and method for testing moisture and temperature of soil mass by heat pulse method

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Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] see figure 2 , the moisture content of the soil directly affects the thermal parameters such as the thermal conductivity and heat capacity of the soil. Using this thermophysical property of the water-bearing soil, a heating element 2 and a temperature measuring element 1 are placed in the test probe. When measuring, The heating element 2 is heated with controllable power, and the temperature measuring element 1 performs continuous temperature measurement, records and saves the temperature acquisition data and heating power, and calculates the moisture content value of the measured soil by using the pre-calibrated parameters. see image 3 , including a CPU module, the CPU module is sequentially connected with the AD conversion module and the temperature signal conditioning module, the CPU module is connected with the communication mod...

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Abstract

The invention concretely relates to a system and a method for testing moisture and temperature of soil mass by heat pulse method. By utilizing the thermal physical characteristic of water-containing soil mass that the moisture content of the soil mass directly affects the thermal conductivity, thermal capacity and other thermal parameters of the soil mass, a heating element and a temperature measurement element are arranged in a testing probe. During measurement, the heating element emits a thermal pulse with controllable power; the temperature measurement element continuously measures temperature and records the change process of heating power and temperature; and through the relation between the water content of the soil mass calibrated and stored in the system in advance and the characteristic parameters of the change process of heating power and temperature, the value of the water content of the tested soil mass can be obtained. The invention has the advantages of wide testing range of soil-mass moisture, high testing precision, capability of testing the ice content of frozen soil mass, and the like, and can realize multi-channel multi-point real-time monitoring.

Description

technical field [0001] The invention specifically relates to a test system and a test method for testing soil moisture and temperature by a thermal pulse method. Background technique [0002] The existing soil moisture in-situ test technology is mainly the high-frequency electromagnetic wave time-domain reflection test method. The main problem of this method is that it cannot test the total water content in the frozen state of the soil. Contents of the invention [0003] The purpose of the present invention is to avoid the above-mentioned disadvantages, and provide a testing method which can test the moisture content of the soil body including frozen soil, and can test the temperature of the soil body at the same time. [0004] The technical scheme of the present invention: a testing system for testing the temperature and moisture of the soil body by using heat pulses. It is characterized in that it includes a temperature sensor with a heating function, the sensor is conn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/56G01N25/18
Inventor 侯仲杰
Owner CHANGAN UNIV
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