High-precision display method of pressure-sensitive coating measuring result

Abstract

The invention provides a high-precision display method of a pressure-sensitive coating measuring result. Firstly three-dimensional coordinate data of a tested model are built, and a surface of the tested model is divided and marked; secondly pressure on the surface of the tested model is measured, and two-dimensional images for showing light strength of fluorescence are obtained; then a relation between a two-dimensional coordinate and a three-dimensional coordinate in each dividing area is built; and finally two-dimensional pressure images are converted into three-dimensional displaying according to the coordinate relation. The method can solve deformation problems of the obtained images, conducts multi-angle displaying on distribution of the pressure on the surface of the tested model, enables partition refining processing to be carried out on the surface according to needs to conveniently and correctly improve result display precision of an area needing high-precision measuring, accurately provides pressure information at any point on a tested three-dimensional model, and effectively recovers real pressure fields in an experimentation process.

Description

technical field [0001] The invention relates to pressure measurement technology of optical pressure-sensitive paint, in particular to a high-precision display method of pressure-sensitive paint measurement results. Background technique [0002] As an emerging pressure measurement technology, optical pressure-sensitive coating pressure measurement technology has attracted wide attention due to its advantages of no damage to the flow field structure, short measurement period, low cost, and full-area pressure measurement. According to the principle of photogrammetry, the measurement result is a two-dimensional grayscale image, and the two-dimensional pressure distribution map obtained by substituting the calibration curve can qualitatively show the pressure changes in various regions on the measured model. However, in aerodynamic measurement, the actual surface of the measured model is mostly a three-dimensional space surface, so that the actual three-dimensional distribution o...

AI Technical Summary

Problems solved by technology

[0005] The result obtained by the pressure-sensitive coating pressure measurement technology is a two-dimensional image, and the surface of the measured model is usually an irregular three-dimensional surface, and the obtained image is a plane view of a distorted and deformed three-dimensional model. Due to the problem that the pressure information of the specific position cannot be directly provided, the present invention proposes a high-precision display method for the measurement results of pressure-sensitive paints. This method can correct the deformation problem of the obtained image and display the pressure distribution on the surface of the measured model from multiple angles. , and the surface can be partitioned and refined according to the needs, so as to improve the display accuracy of the results in the area requiring high-precision measurement, accurately provide the pressure information of any point on the measured 3D model, and effectively measure the real pressure during the experiment. restore

Images