A method for measuring vertical disturbance of high-speed railway bridges based on UAV

Abstract

The invention relates to an unmanned aerial vehicle-based high-speed railway bridge vertical turbulence degree measurement method. According to the method, a high-speed railway bridge to be tested isdetermined; a measurement point and two reference points are arranged on the high-speed railway bridge to be tested; three cameras with the same imaging center and imaging resolution are mounted on anunmanned aerial vehicle; the three cameras can respectively photograph the measurement point and the two reference points; the three cameras on the unmanned aerial vehicle are utilized to simultaneously photograph and image the high-speed railway bridge to be tested according to set time intervals; and the vertical turbulence degree of the high-speed railway bridge to be tested is calculated according to images photographed by the three cameras. The measurement method provided by the invention is not affected by environmental vibration and can realize high-flexibility and easily-operatable high-speed railway bridge vertical turbulence degree measurement with a simple and efficient measuring process realized.

Description

technical field [0001] The invention relates to the technical field of visual measurement of bridge dynamic displacement, in particular to a method for measuring vertical disturbance of high-speed rail bridges based on an unmanned aerial vehicle. Background technique [0002] The dynamic displacement measurement of the high-speed rail bridge based on visual measurement technology needs to set up a camera equipped with a telephoto lens near the bridge to be tested, and use the camera to image the part of the bridge to be tested, record the position of the part to be tested on the image at different times, and then according to the bridge to be tested The position change of the measured part on the image is used to calculate the actual position change of the bridge to be measured, so as to obtain the dynamic displacement of the bridge part. The part to be tested can be a natural surface on the bridge, or a specially made optical mark can be pasted or fixed. [0003] The exist...

AI Technical Summary

Problems solved by technology

[0004] In addition, the camera has high requirements on the environment when imaging, because the measurement process is easily affected by the environment, so that the final measurement accuracy cannot meet the requirements

For example, when the camera is installed near the road, the road vibration caused by passing vehicles will directly affect the attitude stability of the camera, and it is difficult to meet the measurement accuracy requirements of the submillimeter level

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