Mechanism and method thereof for detecting clamping force of test piece in flat thermal conductivity coefficient measuring instrument

Abstract

The invention provides a mechanism for detecting clamping force of a test piece in a flat thermal conductivity coefficient measuring instrument, which comprises a mechanical part, a displacement detecting part and a pressure conversion part. A high-precision displacement sensor which can detect the micro-displacement of the instrument barrelhead is arranged on an instrument barrelhead, and the clamping force received by the test piece can be converted through detecting the output of the displacement sensor. The invention also provides a calibration method of the mechanism for detecting clamping force of the test piece in the flat thermal conductivity coefficient measuring instrument. The effect of the invention is achieved as follows: the clamping force received by the test piece can be calibrated in real time through a clamping force detecting mechanism and the calibration can be carried out on the clamping force detecting mechanism by utilizing a standardized pressure value, and theconsistency of the clamping forces received by the test piece is ensured in repeated measurements, thereby improving the accuracy and the repetitiveness of the thermal conductivity coefficient measurement. The thermal conductivity coefficient instrument with the mechanism for detecting the clamping force of the test piece can be used widely in enterprises producing heat insulation materials, relevant quality inspection departments and units, scientific research institutions like universities and colleges, research institutions and the like.

Description

technical field [0001] The invention relates to a detection instrument, in particular to a test piece clamping force detection mechanism of a plate thermal conductivity measuring instrument, the mechanism and a detection method thereof. Background technique [0002] The thermal conductivity of thermal insulation materials in the industrial and architectural fields is an important parameter used to measure the thermal conductivity and thermal insulation performance of thermal insulation and thermal insulation materials. This parameter is detected by a thermal conductivity tester. The thermal conductivity tester is an important instrument for analyzing physical properties of materials. Its basic principle is to measure the thermal conductivity of materials based on Fourier heat conduction theory. The performance of thermal insulation and thermal insulation materials is determined by the thermal conductivity of materials. The thermal conductivity of a substance depends on many ...

AI Technical Summary

Problems solved by technology

However, most of the existing thermal conductivity measuring instruments at home and abroad do not have the function of pressure measurement.

Although some have the function of measuring pressure and can measure the pressure on the sample during the test, the measuring mechanism uses a pneumatic device, which is too bulky and complicated to implement

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