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Title:
METHOD FOR MEASURING HETEROGENEOUS CONTENT OF FINITE-THICKNESS MATERIAL BASED ON VIRTUAL HEAT SOURCE PRINCIPLE
Document Type and Number:
WIPO Patent Application WO/2019/184076
Kind Code:
A1
Abstract:
A method for measuring the heterogeneous content of a finite-thickness material based on a virtual heat source principle, which falls within the technical field of material testing and analysis. By means of the measuring method, a virtual heat source principle is used to improve the traditional heat impulse method for measuring the heterogeneous content; and infinite virtual heat sources with two different strengths are established to compensate for the heat dissipation effect of heat dissipation outer boundaries of two sides of a finite-thickness sheet-shaped measured material, and the volume heat capacity of the measured material and the heterogeneous content thereof are obtained by carrying out matching, optimization and resolving based on four parameters. The heat transfer model used in the method takes full consideration of the heat dissipation effect of heat dissipation outer boundaries of two sides of a heat transfer medium, the requirement on the outer profile dimension of a measured material is only a finite-thickness flat sheet-shaped material, and the length dimension of the material in the thickness direction is not required; and the heat dissipation condition of the two heat dissipation boundaries of the measured material also does not need to be limited. Therefore, the measuring method solves the problem of accurate measurement of the heterogeneous content of a thickness-insufficient sheet-shaped measured material.

Inventors:
ZHANG TENGFEI (CN)
XU YIHENG (CN)
WANG SHUGANG (CN)
WANG JIHONG (CN)
Application Number:
PCT/CN2018/088690
Publication Date:
October 03, 2019
Filing Date:
May 28, 2018
Export Citation:
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Assignee:
UNIV DALIAN TECH (CN)
International Classes:
G01N25/20
Foreign References:
CN107356627A2017-11-17
CN103630569A2014-03-12
CN104964997A2015-10-07
JP2006329969A2006-12-07
CN102608154A2012-07-25
Other References:
CHEN JIANSHENG, ET AL.: "Detection of Leakage Passage in Fissure Rock with Assumptive Heat Source Method", CHINESE JOURNAL OF ROCK MECHANICS AND ENGINEERING, vol. 24, no. 22, 30 November 2005 (2005-11-30), pages 4019 - 4024, XP055639113, ISSN: 1000-6915
SHEN RUNLIN, ET AL.: "Application of Hotwire Technique to Measure Liquid Water and Ice Content Within Porous Materials", BUILDING ENERGY & ENVIRONMENT, vol. 34, no. 5, 30 September 2015 (2015-09-30), pages 23 - 26
LUO YUN, ET AL.: "Rapid Measurement of Moisture Content in Porous Insulation Materials via Temperature Matching", BUILDING ENERGY & ENVIRONMENT, vol. 36, no. 3, 31 March 2017 (2017-03-31), ISSN: 1003-0344
LEWANDOWSKA, M.: "An analytical solution of the hyperbolic heat condu- ction equation for the case of a finite medium symmetrically heated on both sides", INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 31 January 2006 (2006-01-31), ISSN: 0735-1933
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