Design And Implementation Of Track Monitoring Software For Dual-ship Marine Electromagnetic Towed Body

Due to the gradual decrease of oil resources on land,the focus of oil and gas exploration worldwide has gradually shifted from land to deep sea areas.Marine controllable source electromagnetic detection method is one of the current research hotspots in the field of marine resource exploration,providing high-tech support for the exploration of submarine oil and gas resources.The dual-ship towed marine electromagnetic exploration system,independently proposed by the National 13 th Five-Year Key Special Project has the advantages of rbitrary variable transceiver distances,flexible survey lines and omni-directional three-dimensional electromagnetic observation of the sea floor,compared with the traditional exploration systems,and can effectively improve detection efficiency of deep-water oil and gas resources.In response to the need for monitoring of towed body track data of the receiver and transmitter during the exploration process,this article proposes a design scheme for the tack monitoring software of the dual-ship marine electromagnetic towed body,used to directly monitor the track of transmitter and receiver under water,and it completes the data integration and visualization operation of the exploration information of the dual-ship towed body,so as to assist the exploration personnel in the later analysis and decision-making of the exploration process.Based on the real-time and high-efficiency communication requirements of dual-ship towed bady track monitoring software,this paper uses C# language under the.NET Framework platform to realize the data transmission and data sharing between two ships by means of serial port communication and network communication.The serial port communication is used to receive the GPS information,the TCP / IP protocol is used to build the communication channel,and this paper realizes communication function of the dual-ship by using Socket interface;This article analyzes the received towed body parameter information according to the communication protocol established by serial communication and network communication and UTF-8 decoding method,and parses it into five parameters: time,coordinate X,coordinate Y,depth,and device number to realize real-time visual monitoring of the data.And by studying the GDI + technology,using the algorithm of data value and coordinate value conversion,the received position information is converted into the page coordinates of the GDI + graphic to complete the drawing of the two-dimensional track image of the towed body,and it provides the towed body track monitoring software a more intuitive monitoring method;In order to achieve efficient storage and fast query of planning information and exploration data,this article uses a combination of database technology and text reading and writing,and writes a stored procedure method to improve the speed and security of data storage,and completes local backup of exploration information,which provides data support for subsequent data processing work.At the same time,an abnormal alarm function was added to the design of the track monitoring software to ensure the validity of the monitoring data and the safety of the sea trial.Due to the complex environment of the deep ocean,the towed body is easily disturbed by ocean currents and marine life,resulting in complex changes in depth and affecting the actual marine electromagnetic exploration.It is not enough to rely solely on cable adjustment.Therefore,the six-degree-of-freedom motion equation of the towed body is obtained by establishing a spatial coordinate system,then the Newton's second law is used to establish the dynamic equation of the towed body,and finally the mathematical model of the towed body is obtained through simultaneous decoupling.In this paper,the combination of fuzzy control and PID control is used to control the mathematical model of towed body depth,and MATLAB / Simulink is used for simulation analysis in the laboratory.This article has carried out a large number of indoor and outdoor tests on the operation of the towed body monitoring software.In the laboratory stage,the towed body track monitoring software uses serial communication and network communication for simulation tests.The results show that the towed body trackmonitoring software can realize data communication,data analysis,imagine monitoring,storage and backup,and alarm function.Normal,the software runs stably during the test;During the field test phase,the towed body track monitoring software joined in Donting Lake tset,the first sea trial and the second sea trial exploration.The towed body track monitoring software could run stably during the sea trials through improvement and debugging,and conduct long-term data communication,and it's normal for system call interface,the abnormal alarm is timely and effective,which verifies the feasibility and effectiveness,could meet monitoring demand for exploration work.At the same time,MATLAB is used to simulate the depth of the towed body in the laboratory.The simulation results show that the fuzzy PID control algorithm can achieve accurate control of the depth of the towed body,and the control effect is much better than PID control.