Measurement method for pose of wind tunnel model combining stereoscopic vision with gyroscope

Abstract

The invention provides a measurement method for the pose of a wind tunnel model combining stereoscopic vision with a gyroscope, belongs to the field of computer vision, and relates to a high-precision measurement method for the pose of a thrown object model in a complex wind tunnel environment. A mode that stereoscopic vision is combined with the gyroscope is adopted in the measurement method to achieve high-precision measurement of the pose of the thrown object model in the wind tunnel environment. The gyroscope is adopted to measure information of rolling angles of the model, binary rolling angle values are directly displayed by means of coded mark points, and sequence image acquisition is carried out on the coded mark points of the thrown object model in a movement field through a left high-speed camera and a right high-speed camera; after picture processing is conducted, pitching, rolling and position information of the thrown object model is obtained according to position information of the coded mark points, and rolling parameters of the model are obtained through binary decoding of the coded mark points. The method is simple and reliable, the problem that measured data are difficult to transmit in the wind tunnel environment is effectively solved, influences of noise are effectively suppressed through the high-brightness mark points, image acquisition quality is improved, and pose measurement precision is improved.

Description

technical field [0001] The invention belongs to the field of computer vision measurement, and relates to a method for high-speed pose measurement of a projectile model combined with a stereo vision and a gyroscope in a wind tunnel measurement environment. Background technique [0002] With the continuous development of the aviation industry, the design of the aircraft has increasing requirements for the experimental simulation and measurement accuracy of the wind tunnel environment. Moreover, the precise measurement accuracy of the pose parameters of the object used in the wind tunnel test will directly affect the design of the projectile model and its aerodynamic analysis. For harsh and narrow environments such as wind tunnels, it is difficult to achieve high-precision measurement of its pose due to factors such as small size of the model, wide range of motion, fast motion speed, and limited test angles. As an emerging technology, machine vision has the characteristics of ...

AI Technical Summary

Problems solved by technology

Although this method can realize the pose measurement of non-cooperative targets, it is only suitable for static or micro-displacement measurement, and cannot complete high-speed measurement of objects

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