Bridge joint height difference identification method and system based on image and vibration data analysis

Abstract

The invention discloses a bridge joint height difference identification method and system based on image and vibration data analysis, and compared with an existing daily patrol and hiking detection method, the bridge joint height difference identification method and system are more objective in height difference evaluation of telescopic joints, can quickly perform height difference evaluation on the telescopic joints in daily patrol, can timely discover the height difference problem of the telescopic joints, and improve the detection efficiency of the telescopic joints. A maintenance unit is helped to find out possibly damaged telescopic joints early nowadays; by means of high-frequency patrol and high-precision positioning, long-term tracking can be carried out on height difference estimation of the telescopic joint, whether the height difference occurs again or not and whether damage is caused again or not after the telescopic joint is maintained is evaluated, and maintenance personnel can conveniently evaluate whether joint maintenance measures are reasonable or not; besides, the system provided by the invention does not need to be specially operated by personnel, and the inspector only needs to concentrate on driving, so that the safety risk of the inspector is avoided compared with manual hiking inspection.

Description

technical field [0001] The invention relates to the technical field of road anomaly detection, in particular to a method and system for identifying height differences of bridge joints based on image and vibration data analysis. Background technique [0002] Expansion joints are important auxiliary facilities of road bridges. They are installed at the weak parts of the beam end structure, directly bear the repeated impact of wheel loads, and are exposed to nature for a long time. The environment is relatively harsh, so the expansion joints are prone to damage. Under normal circumstances, due to the inconsistent deformation of the supports on both sides and the uneven settlement of the foundation on both sides of the joint, it is easy to cause a height difference on both sides of the expansion joint, resulting in vehicle jumping when passing by, affecting driving safety; And when there is a height difference in the expansion joint, the wheels will also bring a large impact loa...

AI Technical Summary

Problems solved by technology

[0002] Expansion joints are important auxiliary facilities of road bridges. They are installed at the weak parts of the beam end structure, directly bear the repeated impact of wheel loads, and are exposed to nature for a long time. The environment is relatively harsh, so the expansion joints are prone to damage. Under normal circumstances, due to the inconsistent deformation of the supports on both sides and the uneven settlement of the foundation on both sides of the joint, it is easy to cause a height difference on both sides of the expansion joint, resulting in vehicle jumping when passing by, affecting driving safety; And when there is a height difference in the expansion joint, the wheels will also bring a large impact load to the joint, which will further deepen the deterioration and damage of the joint, further expand the height difference on both sides of the joint, and even large potholes may appear, seriously affecting Driving safety; after many expansion joints were obviously damaged, maintenance personnel only made emergency repairs and filled the potholes, but did not repair the height difference on both sides. After the expansion joints were repaired, the height difference between the two sides remained Existence, under the action of vehicle load and environment, degrades quickly again

[0003] In the daily inspection of the existing technology, the inspection method mainly relies on manual observation. The inspectors take the inspection vehicle to inspect the road surface conditions. The speed of the inspection is relatively fast. Part of the corresponding records are repaired. Therefore, the current height difference of bridge joints basically relies on annual special inspections, which are carried out by manual foot measurement.

[0004] Manual foot inspection mainly uses tools such as a three-meter ruler to measure the height difference of bridge expansion joints. The measurement speed is slow and the efficiency is low. In order to ensure the safety of the surveyors, closed or semi-closed traffic may be required during the measurement operation, which will affect road traffic. , and the frequency of foot measurement is low, and the height difference problem at the seam cannot be found in time. In addition, because foot measurement relies on more labor, the cost of measurement is high, and it is impossible to achieve large-scale and high-frequency detection. In remote areas As well as many low-grade roads, the detection of the height difference of the expansion joint is often ignored. Under the action of the environment and impact load, the expansion joint is prone to damage

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