The Design And Research Of Dynamic Synchronous Multi-channel Data Acquisition System For Lung Sound

Lung sound signals are the most fundamental bio-indicators of human body inphysiological and pathological parameters. It is helpful for doctors to measure the lungsignals, especially to be used in clinical diagnosis and rehabilitation. This paperillustrates the design and research of dynamic synchronous multi-channel dataacquisition system for lung sound in detail and focuses on the hardware design of lungsound acquisition system and the realization of an array imaging based on computertechnology.Lung sounds auscultation is one of the usual methods to diagnose lung diseases inclinic. Collecting and analyzing lung sounds data by means of electronic instrumentswas a populated science research in the field of life science several years ago. Dynamicmultichannel lung sound acquisition system was born on the background of microphonearray imaging technology. Not only does it inherit all kinds of the previous electronicequipment advantages of lung sound acquisition and analysis, but also from a new viewof point gray value of array image describes disease characteristics. It is a good assistantfor hospital’s doctors.The core structure of lung sound acquisition system in hardware structure is basedon FPGA+DSP.The work is focused on the hardware design of the system, the logicdesign of all modules and software programming of the Iterative Lagrange polynomialarray imaging. EP3C25Q240C8N from Altera is used as the core device in the design,and the data from synchronous multi-channel analog to digital convert AD7606is thetarget, which is used to post process. Quartus II software consists of full of IP coreresources which is in Mega Plug-In manager module. The design of the hardware,except the selection of the key chips, the design of all function modules also includesthe interface between FPGA and AD7606and the interface between FPGA and DSP.The program design includes AD7606control module and asynchronous double portFIFO module design with Verilog HDL, and the Iterative Lagrange polynomial array imaging with Matlab and C++language.The system is divided into several modules with specific function and clearlystructure. The core devices are using programmable logic devices and programmabledigital signal processor. So it is easy to modify, optimize, and upgrade. The result of thisstudy not only lays the further foundation of the physiological signal acquisition system,but also has some reference value on array interpolation imaging of computertechnology.