Temperature measurement method of ceramic-based composite material high-temperature component based on electric impedance imaging

Abstract

The invention discloses a temperature measurement method of a ceramic-based composite material high-temperature component based on electric impedance imaging. The measurement method comprises the following steps: manufacturing an electrode; constructing a multi-channel testing measurement hardware system; designing electric impedance real-time imaging software; determining a function relation of the resistivity changed along with the temperature; and acquiring a temperature distribution condition through a resistivity distribution computation result. Through the method disclosed by the invention, the temperature distribution of the high-temperature component can be synchronously, accurately and indirectly measured by combining the real-time computation result on the resistivity distribution of the ceramic-based composite material high-temperature component by the electric impedance imaging technology with the relation of the resistivity changed along with the temperature change.

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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