Cable rope bearing bridge deck vehicle load distribution real-time detection method

Abstract

The invention discloses a cable rope bearing bridge deck vehicle load distribution real-time detection method. The cable rope bearing bridge deck vehicle load distribution real-time detection method comprises the steps of shooting a bridge deck image; conducting perspective correction processing and enhancement processing on the image so as to obtain a bridge deck image subjected to image enhancement and adopting an edge information based detection method to judge a bridge deck vehicle; tracking a vehicle image and correcting a deformed structure of the vehicle in the acquired image; using the bridge deck as an absolute coordinate system, accurately drawing a running track of an automobile tire in each video picture section on the bridge deck, splicing tracks of the same vehicle in different video pictures according to a same track principle to obtain a running track of each vehicle on the bridge deck and achieving vehicle load real-time tracking. The cable rope bearing bridge deck vehicle load distribution real-time detection method is wide in application range, low in cost, capable of obtaining a detection result in real time and small in environmental influence. By means of a perspective correction and image enhancement technology, high-quality earlier-stage images can be obtained. The vehicle blocking problem caused by image acquisition in an oblique state can be well solved by means of a dynamic template matching technology, and the method has a wide application range.

Description

technical field [0001] The invention belongs to the field of bridge detection, and relates to a method for detecting the load of a cable-bearing bridge, in particular to a method for detecting the dynamic load distribution of vehicles on a cable-bearing bridge deck. Background technique [0002] The variable loads of highway bridges are mainly vehicle loads, which are the main basis for bridge structure design. Although the bridge design code clearly stipulates the distribution form and concentration of vehicle loads, this form of live load arrangement still brings some problems in actual engineering, and still cannot meet the fine analysis and design of bridge structures, mainly reflected in three aspects. First, the live load of vehicles on highway bridges defined in the code is a standardized model, which cannot accurately reflect the distribution of vehicles on bridges in some extreme situations, such as traffic congestion on bridges when traffic accidents occur. In th...

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Problems solved by technology

Third, some bridges with single-column piers are prone to lateral overturning of the main girder under the action of eccentric loads, and such accidents have occurred in many places

Although this method can grasp the accurate weight of the vehicle, if it is not combined with the distribution of the vehicle, it cannot grasp the action history of the load on the bridge surface

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