Design And Implementation Of An Underwater Detection And Acquisition System Based On Zynq

As a carrier for underwater information transmission,underwater acoustic signals have significant significance in fields such as ocean exploration,underwater target recognition and positioning,and underwater communication.Among them,high-performance detection and acquisition systems,as commonly used equipment for obtaining ocean environmental parameters,can reliably and efficiently complete the collection,storage,and transmission of underwater acoustic signals.This thesis is based on Zynq’s design of an underwater detection submarine buoy acquisition system The main work of this thesis includes hardware circuit design,software program design and structural design.The overall functions of the system include analog-to-digital conversion of vector sensor signal through A/D converter,self contained storage of data,and real-time data transmission and display processing with the display and control software of the upper computer through the network port,The system is equipped with an electronic compass sensor to obtain the azimuth,pitch,and roll angle parameters of the vector sensor;The system is designed with a fully functional power switch control circuit based on Hall sensing elements and ultra-low power microcontrollers,which can conveniently achieve the system’s timed opening and closing functions.The system circuit design includes two parts: sensor signal conditioning circuit and data storage and transmission control circuit.The signal conditioning circuit mainly completes the amplification,filtering and gain control of the three channels of vibration velocity and single channel of sound pressure output from the vector hydrophone;The data storage and transmission control circuit adopts a Zynq7010 core board supplemented by a motherboard circuit composed of A/D converter,SD card,Ethernet port,serial port,RTC clock,etc.to achieve signal acquisition,storage,and transmission.The overall power supply of the system is provided by a rechargeable lithium battery pack,ensuring that the system can operate stably and reliably for a long time.The design of the software program is mainly aimed at the Zynq-7010 main control chip,which completes the management of RTC and system clock in the PL logic section,the collection of four channel sensor signals,and data caching functions;In the PS embedded part,the main functions include storing raw data,transmitting data using the upper computer,reading and writing RTC clocks,and displaying and storing electronic compass sensor information;PL and PS are interconnected through the AXI4 interface inside Zynq,enabling the interaction of instructions and data.In order to meet the testing requirements of pressure resistance,corrosion resistance,light weight,etc.,the thesis uses 3D modeling s oftware to design and optimize the overall structure of the system during the design process.After completing the assembly of the overall structure of the system,a pressure test is conducted,and the test results show that the system can meet the indicator of a water depth of 200 meters.Finally,the system performance and functionality were tested,and the field test data was analyzed to verify the effectiveness and reliability of the system,which well met the experimental requirements of theoretical research.