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Six-degree-of-freedom motion capture method for wind tunnel model

A motion capture, degree-of-freedom technology, used in aerodynamic testing, testing of machine/structural components, instruments, etc., can solve problems such as inability to directly apply, slow acquisition rate, and inapplicability to hypersonic wind tunnels

Active Publication Date: 2020-12-11
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common 3D scanners and laser scanners on the market are not suitable for hypersonic wind tunnels and cannot be directly applied due to the limitation of their measurement principles and slow acquisition rate.

Method used

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  • Six-degree-of-freedom motion capture method for wind tunnel model
  • Six-degree-of-freedom motion capture method for wind tunnel model
  • Six-degree-of-freedom motion capture method for wind tunnel model

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Embodiment Construction

[0064] The present invention will be further elaborated below in conjunction with embodiment.

[0065] Based on high-speed binocular stereo vision and deep learning, the present invention proposes a six-degree-of-freedom spatial motion vision capture method suitable for hypersonic wind tunnel tests, provides model motion parameters and visualization results, and can be used for headgear separation, Inter-stage separation, light model free flight, heavy model free flight, model attitude identification, wing surface deformation measurement, etc., provide comprehensive space attitude data for research on aerodynamic characteristics, dynamic characteristics, separation characteristics, etc.

[0066] Based on binocular stereo vision and deep learning, the present invention captures the six-degree-of-freedom spatial motion vision of scenes such as headgear separation, inter-stage separation, light model free flight, and heavy model free flight in wind tunnel tests, and based on the p...

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Abstract

The invention relates to a six-degree-of-freedom motion capture method for a wind tunnel model, and belongs to the field of hypersonic wind tunnel non-contact measurement. A high-speed binocular stereoscopic vision system is built, feature points arranged on the surface of a model are captured in real time, and spatial coordinates of the model in the test process are reconstructed based on deep learning and stereoscopic vision, so that six-degree-of-freedom motion data of the model are calculated; and based on high-speed binocular stereo vision and deep learning, the invention provides a six-degree-of-freedom spatial motion vision capture method suitable for a hypersonic wind tunnel test, and model motion parameters and a visualization result are obtained.

Description

technical field [0001] The invention belongs to the field of non-contact measurement of a hypersonic wind tunnel, and relates to a six-degree-of-freedom motion capture method for a wind tunnel model. Background technique [0002] In the field of wind tunnel testing, most of the measurement methods are 2D schlieren observation or high-speed photography to record 2D images, and then obtain model motion through 2D image interpretation for tests such as model free flight, hood separation, and stage separation Trajectories, attitude angles, etc., the amount of information obtained is limited to the two-dimensional plane, which has natural defects when calculating the three-dimensional space attitude of the model, and the amount of information obtained is small. The parameters of aerodynamic characteristics, dynamic characteristics, and separation characteristics will be carried out later. When fitting or parameter identification analysis, there is a lack of effective and sufficie...

Claims

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Application Information

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IPC IPC(8): G01M9/04G01M9/06G01M9/08
CPCG01M9/04G01M9/06G01M9/062G01M9/08Y02T90/00
Inventor 陈勇富文帅刘展刘修廷纪锋陈农陈星
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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