Research On Heart Sounds Detection’s Hardware Platform Based On Microphone Array

As a kind of serious disease, heart disease has been a threat to the health ofhuman body for a long time. Its incidence and mortality rates increase year by year.The diagnosis, prevention and treatment of it become especially important. Theheart sound signal always contains a lot of pathological information. Theinformation shows the states of the heart organ and the interaction between theheart and other physiological organs, it has great application value on medicine.Therefore the study of heart sound signal detection technology is very meaningful.In this paper, there is a design and research of a kind of heart sound detectionhardware platform which is based on microphone array. Propose hardware platformdesign program which meets the functional requirements and performancerequirements. Achieve functions of the exact collection, processing, data storage ofthe multi-channel heart sounds signal and uploading data to PC for further testing.And it provides a powerful system platform for the heart sound detectiontechnology as a support.This paper introduces the basic concept and the related domain knowledgebackground of heart sound detection. In allusion to the domestic, foreigndevelopment situation and present situation of heart sound detection technology, ithas made the exposition and summary. It also introduces the development course ofarray signal processing technology and some commonly used array signalprocessing method at present, and reveals the application background andsignificance of this paper.Then the paper mainly illustrates the microphone array signal processingtechnology. It is through putting some microphones into a range of differentlocations according to certain way of the array mode. The microphone arrayreceives space signal, acquires the relevant data of the source and makesprocessing, then accomplishes the whole process of array signal processing. Mainlyillustrates the microphone array signal processing technology on the three aspectsof the features, research contents and application. Through several successful casesrelated to microphone array detection platform design, it shows the certain research.The structure of each hardware design scheme and implementation method hasbeen fully studied and summarized.Then according to the function, it presents an overall system framework. Thesystem can be divided into five functional modules. It presents the role of eachfunction module in the system, emphasis on the heart sound detection platform hardware circuit and the design of data interface among each function module, andcomplete the hardware production. The paper introduces the control principle ofthe system, the emphasis on the design of the system controller and the setupprocedure of the communication process between PC and this system.