DSP-based Anti-industrial Frequency Interference Submarine Cable Laying Platform Research

With the continuous growth of international information transmission and the booming development of offshore wind power projects,the construction volume and maintenance demand of China’s submarine communication cables and submarine power cables are increasing,and improving the accuracy of submarine cable detection and sounding depth and the efficiency of submarine cable laying have become the main direction of submarine cable engineering research.In this dissertation,the following research is conducted for the problem of industrial frequency interference in submarine cable detection,the problem of depth of sounding prediction and the problem of walking control of submarine cable laying machine:Firstly,according to the demand of submarine cable shallow burial and maintenance engineering,the research and analysis of the current situation of domestic and foreign research on submarine cable detection and depth detection technology,signal anti-industrial frequency interference technology and walking control technology,and the design of submarine cable location tracking,submarine cable burial depth prediction and submarine cable accurate burial function as one submarine cable laying platform according to the research results.Secondly,according to the demand of submarine cable detection and depth prediction,the structure of submarine cable detection and depth prediction sensor is designed,and the "6 probe rods" submarine cable depth prediction model is proposed.The 50 Hz phase synchroniser circuit is designed to extract the industrial frequency noise from the signal and determine the acquisition timing of the submarine cable detection signal.The DSP28335 is used for signal processing to remove the interference signal in the active detection signal,which can effectively improve the accuracy of submarine cable routing detection.Then,according to the burial machine walking control requirements,the Siemens S7-200 smart is selected to realize the shallow shore burial machine walking burial control and umbilical cable winch collection and discharge cable control.The fuzzy sliding mode control strategy was used to reduce the walking error of the shoal burial machine and to improve its ability to track the cable path during the cable burial process.Finally,the cable laying monitoring and control software is designed according to the requirements of the cable laying operation to realise the cable detection information,the predicted burial depth display and the control functions of the shoal laying machine and the umbilical cable winch.Under the simulated active cable detection environment,the cable laying monitoring and control software is used to experimentally verify the sensors,cable burial prediction model and anti-working frequency strategy.Under simulated shoal burial machine walking conditions,the accuracy of shoal burial machine and umbilical cable control is tested,and the effect of fuzzy sliding mode controller on the path following of shoal burial machine is verified through simulation.The submarine cable laying platform designed in this dissertation helps to improve the efficiency and accuracy of the submarine cable project,promote the level of technical development in the field of submarine cable in China,and accelerate the development of China’s marine economy.