Method for measuring high-speed rail bridge vertical dynamic deflection

Abstract

The invention relates to a method for measuring high-speed rail bridge vertical dynamic deflection. The method includes: determining a to-be-measured high-speed rail bridge, and arranging a measuringpoint and two reference points on the high-speed rail bridge; controlling a drone with a camera to fly to a set position close to the left side or right side of the to-be-measured high-speed rail bridge, and using the camera on the drone to shoot the to-be-measured high-speed rail bridge at the set position, wherein the left reference point, the middle measuring point and the right reference pointof the to-be-measured high-speed rail bridge can be shot at the set position; calculating the vertical-direction relative displacement of the middle measuring point, the left reference point and theright reference point in a world coordinate system according to the images shot by the camera so as to obtain the high-speed rail bridge vertical dynamic deflection. By the measuring method, environment vibration influence is avoided, flexible and easy-to-operate high-speed rail bridge vertical dynamic deflection measuring can be achieved, and a simple and efficient measuring process is achieved.

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 the vertical disturbance degree of a high-speed railway bridge. 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 existing machine vision me...

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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