Monocular video measurement method for external store separating locus wind tunnel test

A technology of wind tunnel test and video measurement, which is applied in the field of wind tunnel test for the separation of external objects, and can solve problems such as image stereo matching and data processing process complexity

Active Publication Date: 2016-03-30
INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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Problems solved by technology

[0012] The technical problem to be solved by the present invention is: no additional requirements for the design of the wind tunnel model of the external store in the separation track test (no hole wiring, no damage to the aerodynamic shape, no change in structural strength and stiffness, no increase in design difficulty and cost) In the case of external objects, it solves the problem of identification and matching of marker points when the external object wind tunnel model moves in six degrees of freedom; and in the vibration environment of the temporary wind tunnel, a single camera is used to realize the external object separation wind tunnel test track Accurate measurement, thus avoiding t...

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  • Monocular video measurement method for external store separating locus wind tunnel test
  • Monocular video measurement method for external store separating locus wind tunnel test
  • Monocular video measurement method for external store separating locus wind tunnel test

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[0063] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0064] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0065] Working principle: including image acquisition and processing computer, camera, encircling coding marking points on the surface of the wind tunnel model of the external store, vibration measurement marking points on the wall plate of the wind tunnel test section, used to measure the position and position of the camera when the wind tunnel is running Attitude; the encircling coded marker points refer to the marker points arranged at the ...

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Abstract

The invention relates to the technical field of external store separating wind tunnel tests, and especially relates to a monocular video measurement method for an external store separating locus wind tunnel test. The method overcomes the difficulties of marking point recognition and matching through the circulating coding of marking points when an external store wind tunnel model rotates. The method employs the principle of relative motion, respectively takes a wind tunnel test segment and the external store wind tunnel model as reference objects, solves the position and posture of a camera, further obtains the movement locus of the external store wind tunnel model, achieves the monocular video measurement of an external store separating locus, avoids a stereo matching difficulty of binocular video measurement, and is higher in flexibility and practicality.

Description

technical field [0001] The invention relates to the technical field of wind tunnel tests for separation of external objects, in particular to a monocular video measurement method for wind tunnel tests of separation tracks of external objects. Background technique [0002] After the external storage objects (bombs, auxiliary fuel tanks, missiles, etc.) are dropped from the carrier aircraft, they are in the interference flow field of the carrier aircraft at the initial stage of leaving the carrier aircraft. The characteristics of the interference flow field are related to the shape, flight speed, flight altitude, The attitude of the carrier aircraft, the shape of the external store and its installation position and attitude are related to many factors, and it is difficult to use theoretical methods to predict the flight trajectory of the external store in the disturbed flow field; especially under the condition of high Mach number, due to the influence of compressibility and T...

Claims

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Application Information

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IPC IPC(8): G01M9/06G01C11/00
CPCG01C11/00G01M9/06G01C11/36
Inventor 周润黄叙辉董秀成张征宇李平高荣钊于志松尹疆黄昊宇唐亮范金磊旷靖古世甫
Owner INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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