Measurement method of vertical disturbance of high-speed railway bridge based on UAV

Abstract

The invention relates to a method for measuring the vertical dynamic disturbance of a high-speed railway bridge based on an unmanned aerial vehicle, which is characterized in that measuring points arearranged on a high-speed railway bridge to be measured. A camera is installed on the unmanned aerial vehicle, and markers are arranged on the unmanned aerial vehicle. A total station instrument is arranged on the ground. The method comprises the following steps: controlling the unmanned aerial vehicle to fly to a set position on a horizontal plane of the measuring points and a vertical line vertical to the measuring points, shooting and imaging the measuring points on the high-speed railway bridge to be measured by using the camera on the unmanned aerial vehicle according to a set time interval at the set position, and synchronously measuring the position coordinates of markers on the unmanned aerial vehicle according to the same set time interval as the camera on the unmanned aerial vehicle by using the total station instrument; correcting the image coordinates of the measuring points by using the data output by the total station instrument and the inertial navigation of the unmannedaerial vehicle, and obtaining the vertical dynamic disturbance of the high-speed railway bridge based on the corrected image coordinates of the measuring points. The method is not influenced by environmental vibration, can achieve flexible and easy-to-operate high-precision measurement of the dynamic disturbance of the high-speed railway bridge, and has simple and efficient measurement process.

Description

Technical field [0001] The invention relates to the technical field of bridge dynamic displacement visual measurement, in particular to a method for realizing vertical disturbance measurement of high-speed rail bridges by using drones. Background technique [0002] Dynamic displacement measurement of high-speed rail bridges based on vision measurement technology requires a camera equipped with a telephoto lens to be set up near the bridge to be tested. The camera is used to image the bridge to be tested and record the position of the tested part on the image at different times. The position change of the measured part on the image is calculated to calculate the actual position change of the part to be measured on the bridge to obtain the dynamic displacement of the part of the bridge. 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 existing machine vision measurement method requires strict calibrat...

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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