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Video measuring system and measuring method for model gestures in high-speed wind tunnel

A video measurement, high-speed wind tunnel technology, applied in measurement devices, testing of machine/structural components, instruments, etc., can solve problems such as limiting the application of video measurement systems

Active Publication Date: 2013-10-23
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In summary, the limitation of camera observation field of view and the refraction problem when light passes through glass limit the application of video measurement system in high-speed wind tunnel model attitude measurement

Method used

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  • Video measuring system and measuring method for model gestures in high-speed wind tunnel
  • Video measuring system and measuring method for model gestures in high-speed wind tunnel
  • Video measuring system and measuring method for model gestures in high-speed wind tunnel

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Embodiment Construction

[0044] Such as figure 1 , figure 2 and image 3 As shown, a high-speed wind tunnel model attitude video measurement system includes wind tunnel calibration target 1, glass observation window 2, wind tunnel 3, aircraft model 4, observation window calibration target 5, camera bracket 6 and video measurement system camera 7, wherein the camera bracket 6 includes a universal joint 8, an upper arm 9, a locking screw 10, a lower arm 11 and a chassis 12, and the universal joint 8 in the camera bracket 6 includes a rotating ball head 13, a retaining ring 14. Pin 15, compression screw 16 and support 17;

[0045] The video measurement system camera 7 is placed outside the glass observation window 2 on the wind tunnel 3, the wind tunnel calibration target 1 is fixed on the inner wall of the wind tunnel 3, and the observation window calibration target 5 is fixed on the glass observation window 2 of the wind tunnel 3; The camera 7 of the video measuring system and the universal joint 8...

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Abstract

The invention relates to a video measuring system and measuring method for model gestures in a high-speed wind tunnel. The method includes the steps of adjusting the position and the posture of a camera according to the movement range of a model, calibrating an imaging model of the camera after arranging a glass observation window, measuring three-dimensional coordinates of an identification point of the model by using the new imaging model, and transferring the model into a wind tunnel coordinate system to figure out the spatial gestures of the model in the wind tunnel coordinate system. The video measuring system and measuring method for the model gestures in the high-speed wind tunnel can solve the problem of application limitation of the video measuring system in the high-speed wind tunnel and effectively improve accuracy of measurement on the model gestures in the high-speed wind tunnel.

Description

technical field [0001] The invention relates to a high-speed wind tunnel model posture video measurement system and a measurement method. The video measurement system camera is placed outside the high-speed wind tunnel, and the spatial posture of the wind tunnel internal model relative to the wind tunnel is measured through a glass observation window. Background technique [0002] With the continuous improvement of modern aircraft's requirements for flight quality, stability and maneuverability, the refinement requirements of each design link are becoming more and more stringent. Aircraft design can be roughly divided into aerodynamics, load, strength, and structural design, among which aerodynamic design is the basis of the entire aircraft design. [0003] Wind tunnel testing is the main way to obtain aerodynamic data. In the wind tunnel test, the attitude angle is the basic data, which directly determines the accuracy of the wind tunnel test simulation. Traditional attit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/06
Inventor 付增良魏忠武尼文斌董金刚
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS