Temperature indicating paint spectrum automatic interpretation method and device

Abstract

The invention relates to the field of temperature measurement of temperature indicating paint, in particular to a method for interpreting the temperature of the temperature indicating paint, which comprises the following steps of: acquiring diffuse reflection spectral data of a temperature indicating paint sample plate; establishing a temperature-indicating paint temperature section identification model and a temperature-indicating paint interpretation model in each temperature section by using the statistical characteristics of the extracted spectral data and a machine learning algorithm; when a to-be-detected piece is collected, diffuse reflection spectral data of the temperature indicating paint on the to-be-detected piece is collected, statistical characteristics of the spectral data of the temperature indicating paint on the to-be-detected piece are extracted according to the same spectral data preprocessing and characteristic extraction method as the temperature indicating paint sample plate, and the temperature section of the temperature of the detected position is judged through the temperature section recognition model; and finally, the model is interpreted by using the in-section temperature indicating paint of the temperature section to obtain the temperature value of the corresponding position on the to-be-measured piece, the interpretation is convenient, the interpretation precision is high, and the interpretation is not influenced by ambient light.

Description

technical field [0001] The application belongs to the field of temperature measurement of temperature-indicating paint, in particular to a method and device for automatically interpreting the spectrum of temperature-indicating paint. Background technique [0002] With the deepening of the development of aero-engines in my country, the working environment temperature of the hot-end parts of the engine is getting higher and higher, and the thermal analysis and strength-life analysis of the hot-end parts have higher and higher requirements for the accuracy of surface temperature measurement. The temperature measurement technology of temperature-indicating paint can measure the temperature of high-temperature, high-speed rotating and complex-shaped object surfaces in a large area, overcome the traditional limitation of "point" temperature obtained by installing sensors, and can obtain an intuitive continuous temperature field distribution of the measured surface, and has the adva...

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Problems solved by technology

[0007] The purpose of this application is to provide a method and device for automatically interpreting the spectrum of the temperature-indicating paint to solve the problems in the prior art that the temperature reading of the temperature-indicating paint is too cumbersome or the accuracy is low

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