AUTOMATED SYSTEM FOR MEASURING THERMAL CONDUCTIVITY OF SOLID MATERIALS

被引：0

作者：

Pistun, Yevhen ^{[1
]}

Vasylkivskyi, Ihor ^{[1
]}

Fedynets, Vasyl ^{[1
]}

Krykh, Hanna ^{[1
]}

Matiko, Halyna ^{[2
]}

机构：

[1] Lviv Polytech Natl Univ, Dept Automat & Comp Integrated Technol, 12 Bandery St, UA-79013 Lvov, Ukraine

[2] Lviv Polytech Natl Univ, Dept Heat Engn & Thermal & Nucl Power Plants, Dept Heat Engn & Thermal & Nucl Power Plants, 12 Bandery St, Lvov, Ukraine

来源：

METROLOGY AND MEASUREMENT SYSTEMS | 2024年 / 31卷 / 01期

关键词：

measuring transducer; thermal conductivity; thermal measuring diagram; heat flux; thermal resistance;

D O I：

10.24425/mms.2023.148538

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The paper proposes an automated system for measuring the thermal conductivity of solids in the range from 5 to 400 W/(m<middle dot>K) with increased accuracy and reduced duration of thermal conductivity measurement. The main element of this system is a thermal conductivity measuring transducer built on a bridge diagram balanced by heat flows. Using the theory of thermal circuits, the authors built a mathematical model of the measuring transducer. To implement the automated system for measuring thermal conductivity, materials of heat -conducting elements, reference specimens, and comparative elements were selected, and their design parameters were calculated. The setting parameters of the control system for balancing the bridge measuring diagram were determined. The authors also carried out the calibration of the developed thermal conductivity measuring system using reference specimens and obtained its calibration characteristic with a correlation coefficient R-square of 0.9987.

引用

页码：179 / 193

页数：15

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