Underwater photography measurement method for profile accuracy of semi-rigid self-resilience reflector

Abstract

The invention relates to an underwater photography measurement method for the profile accuracy of a semi-rigid self-resilience reflector and effectively realizes underwater quick detection of the profile accuracy of the reflector by using a digital camera to automatically and quickly measure points to be measured on the underwater reflector and providing the deformation analysis data of the profile accuracy in a zero-gravity environment after the reflector is manufactured. The method comprises the following steps of: firstly, adhering coding points and marking points to the surface of the reflector in a radial mode; and secondly, respectively performing air measurement and underwater photography measurement, performing coordinate system conversion on an object space coordinate which is obtained through the air measurement and the underwater measurement, and thus obtaining the object space coordinate (X3, Y3, Z3) which is measured in air and water under the same coordinate system and obtaining a three-position coordinate difference (dx, dy, dz) of a point position, during the air measurement and the underwater measurement, of each characteristic point on an antenna. The method has the advantages of high measurement speed, high efficiency, low detection cost and high detection accuracy.

Description

1. Technical field [0001] The invention relates to a measurement method, in particular to an underwater photogrammetry method for the surface accuracy of a semi-rigid self-rebound reflector suitable for the spatial position, size, shape, deformation, etc. of objects in a dual-media photogrammetry environment. 2. Background technology [0002] In accordance with the requirements of the relevant national technical standards, when the antenna reflector is completed, it is necessary to carry out deformation detection and analysis in a practical environment or simulated practical environment, so as to obtain application data in a practical environment, and use this as a data basis for analysis and design. . The surface accuracy of the antenna is an important index to measure and evaluate the quality of the antenna. It not only directly affects the aperture efficiency of the antenna, thereby determining the shortest wavelength that the antenna can work, but also affects the main l...

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Problems solved by technology

[0006] In view of the above-mentioned actual situation, in order to overcome the defects of the prior art, the object of the present invention is to provide an underwater photogrammetry method for the surface accuracy of a semi-rigid self-rebound reflector, which can effectively solve the reflection problem of using a digital camera opposite to the water. Automatically and quickly measure the points to be measured on the reflector, and give the analysis data of the surface accuracy deformation of the reflector in a zero-gravity environment after the reflector is manufactured: that is, the reflector is placed in the air and placed in water to simulate zero gravity. The error relationship of three-dimensional deformation accuracy, etc., to realize the rapid detection of the surface accuracy of the reflector in the special environment underwater

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