Design And Implementation Of Underwater Acoustic Signal Acquisition Recording Instruments

Relative to the electromagnetic wave and light,acoustic wave propagation attenuation in the water the smallest,transmission performance is best,can effectively spread over a long distance.Underwater acoustic wave is the information transmission and access to underwater target characteristics of the main information carrier.In order to realize the underwater target detection,location and the communication between the underwater target,will research and analyze of the underwater acoustic signal,and then get target feature information.In the field of underwater acoustic technology,a lot of research needs to be a long time,high precision of acoustic information,this would require the design of a multi-channel synchronous precision underwater acoustic signal acquisition instrument to obtain the acoustic information you need.However,previous acoustic signal acquisition device generally low sampling precision,slow speed of collection and storage,generality is not strong,is often difficult to meet the actual needs.Based on the working unit of the actual demand of engineering application,using ADS1274,MSVC5509 A and CF card as the core device designed to complete a set of four signal synchronization acquisition recorder.Can realize low noise,large dynamic range,multi-channel acoustic signal collecting inventory offline for a long time;Signal processing algorithm adopts modular software design,flexible instrumentation system software of collecting the data to the interior,make the function of the system has strong ability to scale.The sea test for many times,the recorder of high precision,low power consumption,large dynamic range,gm,reliability and functions indicators meet the design requirements.In addition,Papers on the design of hardware and software of system are detailed described.Through hardware and software testing,system testing,performance testing experiment test and sea,we validate the recorder data storage,the continuous acquisition time,data acquisition precision,and discusses in detail the test,the test process.This recorder functions to achieve the expected goals and requirements,but individual part of the performance is not ideal enough,still need to further optimize some algorithm,paper aimed at these deficiencies of the system,and put forward some Suggestions for improvement,laid a certain foundation for the research of system further expansion.