Measurement method of vertical disturbance degree of high-speed railway bridge

Abstract

The invention provides a method for measuring the vertical dynamic disturbance of a high-speed railway bridge, which comprises the following steps of: firstly, arranging a measuring point and two reference points on a high-speed railway bridge to be measured; building a measuring device on an unmanned aerial vehicle, wherein the measuring device comprises a camera, and a left spectroscope assemblyand a right spectroscope assembly which are respectively arranged on the left side and right side in front of the camera lens. And the camera on the unmanned aerial vehicle can shoot and image the left reference point, the middle measuring point and the right reference point which are marked on the high-speed railway bridge to be measured at the same time by utilizing the left spectroscope assembly and the right spectroscope assembly; respectively calculating to obtain the relative displacement of the middle measuring point, left reference point and right reference point in the vertical direction of a world coordinate system according to the image obtained by shooting by the camera so as to obtain the vertical dynamic disturbance of the high-speed railway bridge. By adopting the measuringmethod, the influence of environmental vibration can be avoided, flexible and easy-to-operate high-precision measurement of the dynamic disturbance of the high-speed railway bridge can be achieved, and the measuring process is simple and efficient.

Description

technical field [0001] The invention relates to the technical field of bridge dynamic displacement visual measurement, 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 measu...

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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