A System Of Acquisition, Processing And Transmission For Heart Sounds And ECG Based On OMAP3530

In recent years, the incidence of cardiovascular disease has been high. And heart sounds and ECG data acquisition and processing become the base of heart sounds and ECG detection. Therefore, designing a kind of heart sounds and ECG acquisition and processing system which is reliable performance, low cost, small size, will has important significance of the detecting and preventing cardiovascular diseases.This paper proposes building the heart sounds and ECG acquisition and processing system with the OMAP3530 based on DaVinci technology which is produced by Texas instruments(TI)company as the core. This system mainly consists of three parts:the front-end signal acquisition module, the core processor OMAP3530 module, the module of 3G wireless transmission. Front-end signal acquisition module with the microcontroller MEGA8 MCU as the core, mainly completes the acquisition of heart sounds and ECG, then the data will be sent to the core processor OMAP3530 through the serial; Taking advantages of OMAP3530 dual-core features of ARM+DSP, ARM side first uses ECG to positioning heart sound, then calls the heart sound classification algorithm on DSP side to judge the heart sound; Finally the original heart sound and ECG and the judgment results of heart sound feedback by DSP are wirelessly transmited to the PC monitoring center by the 3G module LC6311.The paper research the system of acquisition,procesing and transmission for heart sounds and ECG.The purpose is to efficient transmission, accurate analysis heart sounds and electrical signals. The main contribution and innovation is:(1) On the part of heart sounds and ECG acquisition, designing hardware circuit of front-end signal acquisition module. Through the front-end signal acquisition module can make the original heart sounds and ECG acquisited by the sensors more accurate, and completed the software design of front-end signal acquisition module.(2) On the part of processing heart sounds and ECG data, we use OMAP3530 based on DaVinci technology which is produced by TI company as the core. And successfully build OMAP3530 development board based on Linux system; Simply analyse the algorithm of diagnose heart sounds,and taking advantages of the OMAP3530 dual-core features, ARM side calls the heart sound classification algorithm of DSP side.(3) On the part of transmit heart sounds and ECG data, we use 3G module LC6311. The chipset is highly integrated, power transmission capacity. In TD-SCDMA mode, support asymmetric data transmission capacity, downlink data transfer rate up to 384kbps respectively. And debugging the module on the platform of OMAP3530. Finally, in PC monitoring center we using Qt write simple graphic interface to check processing results. Finally problems to be solved in this field and future research topics are summarized.