Temperature measurement method for high temperature components of ceramic matrix composites based on electrical impedance imaging

Abstract

The invention discloses a method for measuring the temperature of high-temperature parts of ceramic matrix composite materials based on electrical impedance imaging, which comprises the following steps: making electrodes; building a multi-channel testing and measuring hardware system; designing real-time imaging software for electrical impedance; establishing the functional relationship of resistivity with temperature changes ; The temperature distribution is obtained from the calculation result of the resistivity distribution. The method of the present invention can measure the temperature distribution of the high-temperature component synchronously and accurately indirectly by combining the real-time calculation result of the resistivity distribution of the high-temperature component of the ceramic matrix composite material with the relationship between the resistivity and temperature by the electrical impedance imaging technology.

Description

technical field [0001] The invention relates to the technical field of temperature measurement, in particular to a method for measuring the temperature of a high-temperature component of a ceramic matrix composite material based on electrical impedance imaging. The electrical impedance imaging technology is combined with the relationship between resistivity and temperature variation to measure the temperature distribution of the high-temperature component of an aero-engine in real time. Background technique [0002] With the continuous improvement of aero-engine performance, the gas temperature and turbine inlet temperature are also increasing. The life of an aero-engine depends on the life of the hot-end components, and in order to accurately predict the life of high-temperature components and verify the reliability of the engine design, it is necessary to measure the temperature distribution of the hot-end components. However, in complex high-temperature and harsh environm...

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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a method for measuring the temperature of high-temperature components of ceramic matrix composite materials based on electrical impedance imaging, aiming to solve the problems of difficult temperature measurement in high-temperature occasions and difficult real-time measurement. The method of the present invention can be measured by resistance The real-time calculation results of the resistivity distribution of high-temperature components of ceramic matrix composite materials combined with the relationship between resistivity and temperature changes by anti-imaging technology, and the temperature distribution of high-temperature components can be measured simultaneously, quickly and accurately indirectly

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