Design And Realization Of The Sonobuoy Data Acquisition System

With the constant appearance of the rapid growth of global population,the shortage of natural resources and environmental deterioration,the tremendous advantages of the ocean in resources,space and strategy are becoming more and more concerned for people.Advanced marine science technology and equipment are important bases for the development and utilization of the ocean.Acoustic signal is the only signal that propagates for a long distance in water.As the main measuring device of marine acoustic element survey,sonar buoy can collect the acoustic signal in the ocean accurately.With the development of marine scientific research and ocean comprehensive utilization,the demand of high-performance sonobuoy has been increasing at home and abroad.In this paper,a 16-channel sonobuoy data acquisition system is designed and implemented aimed at the demand of sonobuoy data acquisition.The underwater acoustic signal received by the hydrophone enters the AD to complete the data acquisition.The system can send the acquired signal to the mother ship by the network or store it to the local storage medium.The system can also receive the mother ship instruction to adjust the system working status and working parameter.PC can read the acquired data in the system easily and directly.According to the primary functions of the data acquisition system,the overall design of the system is completed and the overall design of hardware platform and of software program are completed.This paper presents the current development status and development tendency of sonobuoy data acquisition system.Next,according to the difference of the main functions,the hardware platform is divided into analog-digital conversion unit,the data comprehensive control unit and buoy working status management unit and these units are respectively designed.The analog-digital conversion unit mainly completes multi-channel analog to digital conversion of the weak signal received by the hydrophone.Data comprehensive control unit with TMS320F28335 as the main control chip mainly completes the parameter configuration for the analog-digital conversion unit,the network sending of data by W5100,the storing of data to the local CF card and the reading of the system data by the host computer.Buoy working status management unit with the ultra-low power consumption MSP430F1611 microcontroller as the control core,mainly completes the switching of the sleep state,independent working state,monitoring working state and the management of system's energy.In CCS and IAR development environment,C language is used to complete the program writing of the DSP and microcontroller and the co-debugging of the hardware and software is completed,which mainly realizes all functions of the system.Finally,the respective test ofeach unit in the system and the test of the whole system are completed.The test results indicate that the sonobuoy data acquisition system works stably,mainly fulfills the expected functions and meets the design requirements of the system.