Turbine blade three-wavelength radiation temperature measuring device and method

Abstract

The invention belongs to the technical field of radiation temperature measurement. Radiation energy of a turbine blade in three different wavebands and environment energy data acquired in the three wavebands are acquired and substituted into an error function of a three-wavelength radiation temperature measurement method, then an L-M algorithm based on step-by-step long search is used, the temperature distribution range of the turbine blade is divided, one temperature value is taken as an initial value for solving in each temperature range, and finally all obtained results are compared to obtain a minimum error value and a temperature corresponding to the minimum error value, namely, the minimum error value is regarded as the real temperature of the surface of the turbine blade. The method can realize the radiation temperature inversion of the turbine blade with unknown emissivity in the radiation environment, and has the characteristics of high measurement precision and high operation speed.

Description

Technical field [0001] The present invention is belonging to the field of radiation temperature measurement, and in particular, the present invention relates to a three-wavelength radiation temperature measuring device and method for considering reflective energy. Background technique [0002] In order to achieve high efficiency and high performance operation of the engine, the turbine blade is required in a high temperature environment, but the temperature can cause damage to the blade if it exceeds the end of the turbine blade, which causes damage to the blade, which makes it significantly reduced, or even cause damage, this will give The engine's operational safety has a great threat, and the lack of turbine blade temperature data is also seriously restrictive of my country's aviation engine's research and development process. Therefore, temperature monitoring of the surface of the turbine blade can ensure that the turbine blade operates in a suitable temperature range. On the...

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Problems solved by technology

[0005] In order to solve the problem of low temperature measurement accuracy caused by the reflection influence of the target blade and the unknown emissivity, the present invention proposes a three-wavelength radiation temperature measurement method and device for turbine blades considering the influence of reflection energy. The present invention can be used for temperature measurement The radiation temperature inversion of turbine blades with unknown emissivity in radiation environment does not need to measure and calibrate the blades in advance, avoiding complex iterative calculations, and has the characteristics of high measurement accuracy and fast operation speed

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