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Real-time spatial displacement measurement system based on linear array CCD

A technology of spatial displacement and measurement system, which is used in measurement devices, testing of machine/structural components, aerodynamic tests, etc. Effect

Inactive Publication Date: 2018-01-19
LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The real-time spatial displacement measurement technology based on linear array CCD is a hot research topic at home and abroad. However, due to the existence of noise sources such as light sources, optical imaging systems, CCD devices, and signal processing circuits in the system, as well as the discrete physical structure of CCD devices, the influence of In order to improve the measurement accuracy, it is necessary to carry out relevant technical research to improve the accuracy and real-time performance of real-time spatial displacement measurement

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Embodiment Construction

[0027] The specific implementation manners of the present invention will be further described below in conjunction with the drawings and examples. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0028] The technical scheme of concrete implementation of the present invention is:

[0029] Such as figure 1 with figure 2 As shown, a real-time spatial displacement measurement system based on linear array CCD includes:

[0030] A three-position real-time positioning device composed of three one-dimensional image acquisition units fixed at three equidistant positions at a certain angle between the optical axis directions. The one-dimensional image acquisition unit consists of cylinders whose central axes are perpendicular to each other. Composed of lens and linear array CCD,

[0031] LED groups placed on the point to be measured,

[0032] And an int...

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Abstract

The invention discloses a real-time spatial displacement measurement system based on a linear array CCD. The system includes a three-dimensional real-time positioning device, an LED group placed in atested point, and an integrated data collecting and processing device. The three-dimensional real-time positioning device is composed of three one-dimensional image acquisition units of which the axesform a certain angle and are fixed in three equidistant positions. Each one-dimensional image acquisition unit is composed of a cylindrical lens and a linear array CCD of which the center axes are perpendicular to each other. The real-time spatial displacement measurement system based on a linear array CCD can be used to measure the spatial displacement in real time, can improve the precision andreal-time performance of real-time spatial displacement measurement, and meets the measurement requirements of the attitude angle, trajectory, vibration and other parameters of a model in low-speed wind tunnel test.

Description

technical field [0001] The invention relates to a real-time spatial displacement measurement system based on a linear array CCD. Background technique [0002] The current model design has higher and higher requirements for wind tunnel tests, and wind tunnel tests are becoming more and more refined. In the wind tunnel test, the attitude of the model under wind load is inconsistent with the attitude of zero load, resulting in experimental errors. For large transport aircraft, an uncertainty of 0.0001 in the drag coefficient will change the payload by 1% in long range cruise. How to remove the influence of model attitude changes from the test results, the premise is to obtain the real-time attitude angle and dancing trajectory of the model, and the launch test should analyze the impact of parameters such as angle of attack, sideslip angle, speed, shape, and position on the model movement. The impact of trajectory and attitude, research on aerodynamic mechanism and countermeas...

Claims

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Application Information

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IPC IPC(8): G01M9/06G01B11/02
Inventor 梁磊段丕轩赵维明姜裕标马军朱本华刘垒田仁君张依婷张莉洁刘海泉金启刚李士伟尹熹伟岳廷瑞张逊李付华赵亮亮姜德龙
Owner LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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