Bridge deflection detection method based on automatic zooming real-time image processing

Abstract

The invention discloses a bridge deflection detection method based on automatic zooming real-time image processing. Firstly, a rectangular target is fixed at a certain fixed position on a bridge, andthe position of a camera is regulated to image the target at the center of an image. The camera accesses an embedded processor, image information of the target is processed to obtain a position of a center point of the target, and coordinates of the position are used as reference values. Along with changes of a deflection of the bridge and a distance from the target to the camera, the size and thecenter position of the target appearing on an optical screen are changed; the target occupies most of position in the image by an automatic zooming technology; then a relative reference displacementof the center point of the target is obtained and a deflection variation is calculated. The bridge deflection detection method is convenient and simple to operate, adopts light and small hardware, isaccurate to measure and can implement real-time measurement.

Description

technical field [0001] The invention belongs to the technical field of long-distance non-contact measurement, in particular to a bridge deflection detection method based on automatic zooming and real-time image processing. Background technique [0002] In a modern society where mechanized equipment is highly concentrated, measurement technology undoubtedly occupies a pivotal position. However, the current requirements for measuring equipment not only require high measurement accuracy and efficiency, but also require the measurement equipment to be easy to operate, light to carry, and have a high degree of automation. In some special occasions, such as high temperature, small size, high speed, long-term detection, etc., the traditional measurement method has been difficult to meet the daily needs. Therefore, it is of great significance to explore and research new automatic long-distance non-contact measurement methods. [0003] Non-contact measurement methods generally incl...

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Problems solved by technology

[0004] There are some unavoidable defects in the traditional bridge deflection detection method. The inclinometer method has high requirements on the accuracy of the instrument itself and the installation; the static level method has high precision and strong anti-interference, but the range is limited; the precision level method , can only rely on manual measurement, the impact of man-made and the environment is relatively large, and the efficiency is low; GPS satellite positioning system, the measurement accuracy is not high, and the cost is high, etc.

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