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A Method of Measuring the Displacement in Airplane Static Test by Using Camera

A static test and displacement technology, applied in the field of displacement measurement, can solve the problems of difficult layout, many devices for measuring displacement, and low precision, and achieve the effects of high precision, dynamic real-time measurement, and large measurement range ratio.

Active Publication Date: 2017-01-11
郑州辰维科技股份有限公司
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Problems solved by technology

[0007] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a method for measuring the displacement in the static test of the aircraft by using photography, which can effectively solve the problem that there are many devices for measuring displacement in the static test, difficulty in layout and low accuracy. low problem

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  • A Method of Measuring the Displacement in Airplane Static Test by Using Camera

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Embodiment Construction

[0048] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0049] Depend on Figure 1-4 Provide, a kind of method that the present invention utilizes photograph to measure displacement in aircraft static test, comprises the following steps:

[0050] 1. Install the camera

[0051] Install the camera on the bracket above the aircraft. A total of 8 cameras are used, four of which form a group. Each group of cameras can be used independently as a single system. When installing, ensure that each measured point of the aircraft structure to be tested is at least 3 In the field of view of the first camera, the coordinates of the measured point can be measured as long as there are two cameras that can capture the measured point during the measurement process, so that the measured point can still be measured when one camera is blocked Coordinates improve the stability of the system meas...

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Abstract

The invention relates to a method for measuring displacement by using a camera in a static test of an aircraft, which can effectively solve the problems of a large number of displacement measuring devices, difficult layout and low precision in the static test. Orient the cameras to determine the relative position and attitude relationship between the cameras; 3. Install tooling; 4. Coordinate transformation; , the displacement of the measured point in the three coordinate directions can be measured at the same time; the measurement range ratio is large, the theoretical range is the entire field of view of the camera, and the actual test range is up to 6 meters; the accuracy is high, and the measurement accuracy is up to 1 / 10000; It can measure a large number of target points at the same time; it can realize dynamic real-time measurement, and the continuous frame rate can reach 5 frames per second; the equipment is easy to set up and easy to operate; it is an innovation in the static test displacement measurement method.

Description

technical field [0001] The invention relates to a method for measuring displacement, in particular to a method for measuring displacement in aircraft static test by using photography. Background technique [0002] The static test is to use the test method to study the static strength characteristics of the aircraft structure under the static load, that is, to test the ability of the structure to withstand the ultimate external load, and to study the static characteristics of the engineering structure under the static load such as strength, stiffness and stability. . In the static test, the displacement of the test object is one of the very important parameters. At present, displacement sensors or laser range finders are mostly used to measure the displacement. This method has many shortcomings: [0003] 1) The measurement accuracy is low. The relative accuracy of the displacement sensor is 1 / 1000, and the accuracy of the laser rangefinder is about 1mm; [0004] 2) More me...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/03
Inventor 王河伟马海金
Owner 郑州辰维科技股份有限公司
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