Multi-parameter synchronous measurement method, device and system

Abstract

The invention relates to a multi-parameter synchronous measurement method, device and system. The method comprises the following steps: obtaining an initial image of the surface of a measured object when the surface of the measured object is not heated, an examination image of the surface of the measured object in the heating process and a reference temperature of a reference point of the surface of the measured object in the heating process; determining the light intensity of each channel of the initial image and the assessment image; determining a temperature field of the surface of the measured object; determining an out-of-plane displacement field of the surface of the measured object; and determining a deformation field of the surface of the measured object according to the light intensity of the blue light channel of the initial image and the light intensity of the blue light channel of the examination image. According to the multi-parameter synchronous measurement method provided by the embodiment of the invention, the problems of error increase and incapability of measuring out-of-plane displacement easily caused by channel crosstalk of an existing multi-channel camera are eliminated, synchronous and accurate measurement of a deformation field, a temperature field and an out-of-plane displacement field of a measured object in a high-temperature environment is realized, and the method has the characteristics of high precision and high efficiency.

Description

technical field [0001] The present disclosure relates to the field of measurement technology, and in particular to a multi-parameter synchronous measurement method, device and system. Background technique [0002] The thermal protection system is an important part to ensure the reliability and safety of the spacecraft when it re-enters the atmosphere, and the performance of the thermal protection material / structure is the key to the success of the flight mission. In order to ensure the safety and reliability of materials / structures in formal service, a complete ground high temperature assessment test is necessary. Methods such as arc wind tunnel heating, quartz lamp heating, and flame heating have developed into the main means of material thermal assessment. . In order to obtain the mechanical properties and ablation evolution laws of materials at high temperatures, it is particularly critical to develop non-contact image acquisition methods. The key point is that at this ...

AI Technical Summary

Problems solved by technology

In order to obtain the mechanical properties and ablation evolution laws of materials at high temperatures, it is particularly critical to develop non-contact image acquisition methods. The key point is that at this stage, using a color camera to obtain image information during the material assessment process is a common technical means, but on the one hand, the light intensity crosstalk between channels seriously affects the test accuracy; on the other hand, the existing test technology can only obtain plane deformation. Unable to get out-of-plane deformation accurately

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