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Ultra-high-speed free-flight attitude measurement method for complex shape models

A measurement method and technology of flight attitude, applied in the field of ultra-high-speed free flight attitude measurement of complex shape models, can solve the problem of high cost

Active Publication Date: 2020-04-10
中国空气动力研究与发展中心超高速空气动力研究所
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Problems solved by technology

Using collimated shadow photography for such a large field of view is not only expensive, but also has the risk of processing large-aperture optical components

Method used

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  • Ultra-high-speed free-flight attitude measurement method for complex shape models
  • Ultra-high-speed free-flight attitude measurement method for complex shape models
  • Ultra-high-speed free-flight attitude measurement method for complex shape models

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Embodiment Construction

[0040] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] Such as figure 1 , figure 2 As shown, a method for measuring the attitude of an ultra-high-speed free flight of a complex shape model, the method specifically includes the following steps:

[0042] Step 1. Establish a binocular measurement station, and use the calibration board to calibrate the binocular measurement station;

[0043] Place the calibration board in the binocular measurement field of view of the binocular measurement station, where the different P points on the calibration board k The spatial position relationship of (k represents the label of the marking point) is known; the binocular window glass is calibrated as a part of the imaging optical path, and the single-station measurement coordinates are established. The world coordinate system O-XYZ measured by the binocular system is established on the left cam...

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Abstract

The invention relates to the technical field of model attitude measurement, and particularly discloses a method for measuring the ultrahigh-speed free flight attitude of a complex shape model. The method comprises the following steps: 1, establishing binocular measuring stations, and calibrating the binocular measuring stations by using a calibration plate; 2, associating the binocular measuring station; 3, making a model marking point, and performing scanning modeling; 4, obtaining a front light image and a flash time sequence in the ultrahigh-speed free flight process of the model; and 5, solving the attitude of the model by using image processing. The binocular front light photographing positioning measuring station with the diameter of the visual field of the ultrahigh-speed 200 m flight of the complex shape model being more than 1 m is established, and the attitudes and the centroid coordinates of the ultrahigh-speed flight model at every measuring station are solved according tothe binocular front light image; and the flash times of the laser devices of the binocular measuring stations are combined to obtain the speed of the model in the ultrahigh-speed flight process.

Description

technical field [0001] The invention belongs to the technical field of model attitude measurement, and in particular relates to a method for measuring the attitude of a complex shape model in ultra-high-speed free flight. Background technique [0002] The methods of model attitude measurement mainly include shadow photography and high-speed photography. Collimated shadow photography has the same magnification of objects and images. It is an important non-contact test method for ballistic performance, space flight attitude, speed, flow field, etc. of high-speed and ultra-high-speed flying projectiles. It uses short pulse light sources to obtain clear shadow images. ; An orthogonal shader is installed on the ultra-high-speed free-flying trajectory, and the orthogonal shadow image combined with the reference system can calculate the flight attitude of the model. The high-speed camera method is to use a high-speed camera to capture the flight image of the model, and calculate t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C11/00G01C11/08
CPCG01C11/00G01C11/08
Inventor 黄洁柯发伟宋强文雪忠王宗浩李鑫谢爱民柳森
Owner 中国空气动力研究与发展中心超高速空气动力研究所
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