The Development Of Automatic Measuring System About The Acoustic Parameters Of Marine Sediments

The marine sediments,as an important component of the ocean,is researched increasingly by scientific researchers.At present,the measurement method of marine sediments acoustic parameters is divided into laboratory measurement and marine in situ measurement.The marine in situ measurement,which changes hardly the original environment of marine sediments,and the measured value is closer to the true value,is gradually becomes the mainstream measurement method of marine sediments acoustic parameters.In order to further improving the measurement accuracy and shortcomings of marine sediments acoustic parameters,so our research group design a new type of the acoustic parameters in situ automatic measurement system of marine sediments,which based on FPGA.In this system,the advantages of programmable logic devices are applied to the field of marine sediments acoustic parameters research.The main contents of this paper are as follows,(1)The design of hardware platform of acoustic parameters automatic measurement system of marine sediments,which is achievement by flexibly use Multisim,FilterPro and Altium Designer and other software in this paper,which include the overall program design of the system and the design of the acoustic wave automatic measuring instrument and the drawing and simulation of the hardware circuit schematic of the data acquisition system and the design of the PCB circuit board.(2)The design of hardware program about data acquisition system.In this paper,the EZ-USB FX2 LP firmware program of the system was successfully designed by using the Cypress company's firmware program template and PC software and Keil uVision4 as the compiling environment.Then the design of digital circuit system for Intel Cyclone IV EP4CE6E22C6 N FPGA chip is realized by using Quartus Prime software with modular design ideas.And the design principle of the main module is expounded.The entire digital circuit system meets the requirements of the system.(3)The design of application program and laboratory tests about the acoustic wave automatic measuring instrument.In this paper,the human-computer interaction interface of the acoustic wave automatic measuring instrument is designed by LabVIEW software,which realized the automatic calculation and preservation of the acoustic parameters and the instrument parameters controllable,and the design of some of the main modules is explained.The assembly and laboratory tests of acoustic wave automatic measuring instrument.By using the acoustic automatic measuring instrument and the oscilloscope to test the sine wave generated by the signal generator,and the acoustic automatic measuring instrument test the acoustic parameters about the marble style,the accuracy and the function perfectness of the acoustic wave automatic measuring instrument are had verified.The research of this paper,which broaden the acoustic parameters in situ measurement method of marine sediments,and which realize the combination of the programmable logic device and the acoustic research of marine sediments,and which have some reference value.