Solid material thermal physical property test system and method based on mirror image heat source principle

Abstract

The invention belongs to the technical field of solid material thermal physical property parameter tests, and particularly relates to a solid material thermal physical property test system and methodbased on a mirror image heat source principle. A data collection module comprises a temperature measuring thermocouple, an AD converter and a computer, wherein the temperature measuring thermocouple is arranged on the upper surface of a test sample; the temperature measuring thermocouple is connected with a signal processing unit through a wire; data is input into the computer by the signal processing unit through a wire, and is displayed and stored. On the basis of a parallel thermal line method, by combining a mirror image thermal source principle, a novel solid material thermal physical property parameter measuring and calculation model is provided; on the basis of the thermal line method test principle, the sample heat insulation boundary is used as the boundary line; a virtual mirrorimage thermal source exists in a position symmetrical to the real thermal source, so that the heat accumulation effect influence caused by the heat insulation boundary is eliminated; therefore, duringthe test, the experiment time and the sample thickness do not need to be limited; the test precision of the thermal line method is effectively improved, and the experiment operational difficulty is effectively reduced.

Description

Technical field: [0001] The invention belongs to the technical field of testing thermophysical properties of solid materials, and in particular relates to a system and method for testing thermophysical properties of solid materials based on the principle of mirror heat sources. Background technique [0002] With my country's increasing emphasis on energy conservation and emission reduction, various new materials emerge in an endless stream, and the research on the testing methods of thermal physical parameters of materials will receive continuous attention and development. Among the existing test methods, the unsteady heat source method has been widely used due to its high test efficiency, and has been used as a standard method for measuring the thermal conductivity of refractory materials and non-metallic solid materials. However, in order to meet the infinite medium conditions of the principle model of the heat source method, the test standard of the heat source method has...

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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention solves the problem that in order to meet the infinite medium condition of the principle model of the heat source method, the test standard of the heat source method clearly requires the thickness of the sample. If the thickness of the sample is not enough, it needs to be thickened by means of melting , and at the same time limit the thickness of the sample and the experiment time, which is not conducive to the experiment operation and limits the application range

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