Automatic correction method in bridge deflection measurement

Abstract

The invention relates to an automatic correction method in bridge deflection measurement, and belongs to the field of structure monitoring. The measurement process of the method is as follows: a bridge is provided with a bridge main body and bridge piers, when a vehicle runs on the bridge surface under load, the bridge main body generates deflection deformation due to the action of the load, and monitoring infrared emission points mounted at the abdomen of the bridge main body generate corresponding settlement; a video image is shot through a deflection monitoring camera, and a change value ofthe central point position of the infrared emission point in the image is obtained; the automatic correction process of the method comprises the following steps: setting a reference calibration pointon the bridge main body, identifying the size of occupied pixels through the known size and image of the reference calibration point to obtain an actual length value corresponding to a unit pixel, and calculating the length corresponding to a corresponding measurement value through the actual length value to obtain the length of the bridge main body. Deflection changes of monitoring points are judged through image recognition, and the function of automatic correction is achieved.

Description

technical field [0001] The invention relates to an automatic correction method in bridge deflection measurement, which belongs to the field of structure monitoring. Background technique [0002] With the rapid development of my country's transportation facilities, the construction and use of bridges have increased sharply. With the increase of traffic load and the increase of service life, the safety of bridges has attracted more and more attention from relevant management departments and technical units. Deflection monitoring is an important indicator. Traditional manual methods and automatic monitoring methods have certain limitations, and it is difficult to meet the current needs. [0003] In recent years, the deflection monitoring system using camera image recognition technology has been applied, and its high precision and fast response speed have been widely used, but it cannot realize the automatic correction function. Contents of the invention [0004] The purpose o...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of my country's transportation facilities, the construction and use of bridges have increased sharply. With the increase of traffic load and the increase of service life, the safety of bridges has attracted more and more attention from relevant management departments and technical units. Deflection monitoring is an important indicator. Traditional manual methods and automated monitoring methods have certain limitations, and it is difficult to meet current needs.

[0003] In recent years, the deflection monitoring system using the camera image recognition technology has been applied, and its high precision and fast response speed have been widely used, but it cannot realize the automatic correction function

Images