Seepage Water Level Identification Of Submarine Tunnel Based On Video Images

The construction of the submarine tunnel has brought great convenience to the cross-strait transportation,and has played an indelible role in promoting economic exchanges.The main work of the subsea tunnel operation and maintenance is to discharge the tunnel seepage from the waste water room to ensure the safe and stable operation of the submarine tunnel.In this paper,the seepage water level identification system of subsea tunnel is designed to monitor the water level value of the water seepage in the sewage room to ensure that the submarine tunnel is always in a safe state.The main research work and results of this thesis are as follows:Firstly,the video image data of Xiamen Xiang ’ an submarine tunnel wastewater room is studied,and the content of video image is fully analyzed.On this basis,the whole frame of water level identification system for subsea tunnel wastewater is designed,including hardware configuration and software part function design.Then,topology of the three-dimensional space scene in the waste water room is made by using topological knowledge,and the water level measurement system is further topological with the hardware part designed in this paper.According to the fundamental nature of cross ratio in perspective projection and the construction of water level measurement system,the water level measurement model of subsea tunnel is designed and the detailed solution of measurement model is given.Finally,according to the design of the measurement model solution,the video image processing technology is used to obtain the unknown quantity in the measurement model.First,the preprocessing of the experimental image data includes image processing,image enhancement processing based on MSRCR algorithm,image smoothing based on Gaussian filter,median filter,and bilateral filtering.Then,a method based on fast corner detection and the geometrical feature of calibrated channel steel is proposed to realize the feature comerp’to be detected;a linear fitting method based on adaptive thresholding of image and reference experiment to determine the intersection line between water surface and pool wall,and then the characteristic points p are determined;an edge detection algorithm based on color image feature,gray gradient and adaptive threshold combination is proposed to detect the boundary of the calibrated Groove steel,and then to determine the vanishing points v1,v2 v3.Finally,according to the character of the vanishing line in the perspective projection,we find the intersection point f of the target objectpp’and the kill line.by substituting the unknown quantity and the given quantity into the seepage water level measurement model,the seepage water level of the submarine tunnel is finally realized without ruler recognition.