Acoustic Measurement Method Of Underwater Active Acoustic Equipment Based On Joint Positioning Technology

With the increasingly frequent development of marine and offshore exploration activities,measurement and performance test parameters of underwater equipment performance become more and more important.Especially the measurement of the acoustic parameters of active underwater acoustic equipment under field conditions,We need to design an underwater vehicle based on joint positioning and acoustic measurement system,and complete the positioning of the underwater acoustic parameters measurement,and the interface design of navigation and positioning of the host computer through the Labview system,this paper is based on the needs of the following several parts of research.First of all,underwater vehicle equipped with inertial navigation system.based on the analysis of gyro and accelerometer solution principle,calculation of submersible position,velocity and attitude.aiming at the defects of accumulation of inertial system error,the inertial navigation system and Doppler log through Kalman filter to complete the data processing,and through the starting GPS point to calculate the water trajectory.Secondly,to complete the four element cross array passive positioning simulation and field test based on the analysis of location error and put forward the improvement measures for CW signals,the pulse method combined with the advanced crude measurement method and Notch filter for LFM signal,proposed a weighted correlation function and correlation peak interpolation,the passive localization model approximation error proposed genetic optimization the algorithm,through simulation and field experiments to compare the hyperbolic intersection method and direction intersection method.Again,the submarine received acoustic positioning data uploaded to the computer,the network communication protocols,such as TCP/IP,UDP communication protocol,the communication principle and analysis of both similarities and differences,through the Labview module to complete TCP/IP programming and simulation,and through the DAQmx module in Labview to compete data acquisition program.Finally,the research direction of the measuring principle of the underwater active acoustic equipment outfield sound source level,and the design of the underwater acoustic measurement of the acoustic equipment working process,complete convergence between inertial navigation,acoustic positioning,network communication and the acoustic measurement system.Written by Labview network communication protocol,inertial navigation display,calculate the acoustic passive localization and display,acoustic measurement display interface,complete the unified control and management of the whole system.