Research On The Track Of Towing Cable In Marine Towing System

As the largest resource in the world,the ocean is rich in mineral resources and oil and gas resources.In the exploration activities of various marine resources,as an effective underwater exploration platform,ocean towing system has been widely used in many fields such as marine research,monitoring and acoustic countermeasures,and plays an increasingly important role.There are many common marine geophysical techniques: marine seismic exploration;marine electromagnetic exploration;marine chemical exploration.Among them,marine seismic exploration has always been an important research direction of offshore oil and gas exploration.Its basic principle is to start excitation by non explosive source,after reflection of seabed media layer,receive the received seismic signal by hydrophone installed in the rear streamer of deep towed source,collect,analyze and calculate the received seismic signal,and obtain the bottom data of seabed.In the study of marine seismic exploration technology,acquisition equipment and methods need to be improved continuously to provide seismic exploration accuracy,and the position accuracy of geophone is one of the key factors affecting the accuracy of seismic exploration.In order to ensure the exploration effect and improve the accuracy and accuracy of seabed exploration,not only the stable operation of the underwater equipment system,but also the accurate acquisition of the status and location information of the acquisition equipment of the system,such as the data information of sensors such as hydrophones and depth meters,which is related to the positioning accuracy of the whole system and the accuracy of data interpretation,and ultimately affects the accuracy of the system Detection effect.However,in the actual marine test or exploration,the underwater equipment system is often affected by the environmental factors,and it is difficult to maintain a certain stable state;in addition,the underwater equipment is affected by the interaction between the internal equipment of the system,such as the operation of the mother ship towing,rope retraction and release,etc.,which is more difficult to maintain the stable operation of the underwater system,making it not ideal to fluctuate,shake,overturn,etc Status,these ultimately seriously affect the detection effect of the system equipment.Therefore,it is of great significance and value to study the motion law of the underwater towing system and to accurately predict and interpret the track position of the underwater towing body and the towing cable in real time.Based on the existing methods and the actual situation,this paper first studies the dynamics and kinematics of the underwater streamer,constructs the steady-state model of the underwater streamer,and obtains the position and trajectory of the streamer under the steady-state motion;on the other hand,because in the actual deep-sea test,many parameters and variables can not be predicted and confirmed,so we use the forward method from the dynamics and It is difficult to analyze the angle of kinematics,and the accuracy is difficult to guarantee.We use the attitude sensor installed in the towed body and streamer,by obtaining the fixed node position sensor angle,using a certain mathematical method to obtain the position of a limited number of nodes,through mathematical interpolation and curve fitting,we can get the position and trajectory changes of the streamer when it moves underwater.In addition,the corresponding streamer trajectory monitoring software is developed to monitor the attitude information and streamer position of the underwater towed body in real time,and update the relevant display of the underwater deep towing equipment in real time.