基于智能移动终端的低成本心音采集系统

Low-Cost Heart Sound Acquisition System Based on Intelligent Mobile Terminal

目的为了有效预防心脏疾病,降低电子听诊器成本,本文设计与实现了基于智能终端的低成本心音采集系统。方法通过软、硬件的结合,实现了基于手机等移动终端的心音采集、传输和分析。本系统硬件部分将心音的模拟信号通过AV线传输给智能手机。手机上的心音采集软件实时显示心音图,并将数据保存为wav格式,便于传输和后续服务器端的分析。同时,本文采用主、客观测评方法,将本系统与目前市场常用的两款应用于临床的听诊器所采集心音的质量进行了对比。结果该系统不仅能随时实时捕获心音,而且采集的心音信号质量好,心音图清晰、准确。与另两款商业听诊器对比,本系统性能可靠,能满足临床要求。结论本系统能方便、准确地采集心音信号,极大地降低了成本,而且并能通过智能终端将心音数据发送给医生,方便诊断。

Objective To prevent cardiovascular diseases, and reduce the cost of the electronic stethoscope, this article designs and implements a heart sound acquisition system based on low-cost smart phone and Android system. Methods In this paper, the acquisition of the heart sounds is achieved by combining the design of hardware and software. Via an AV cable, the designed hardware of this system transmits analog heart sounds signal to a smart phone. The heart sounds can be real-time displayed on the smart phone and can be saved as wav format for further analysis and transmission through our designed software based on Android system. By using subjective evaluation and objective evaluation method, the performance of our designed stethoscope was compared with these of two commercial stethoscopes, which have widely clinical applications currently on the market. Results The designed system can stably capture heart sounds with high quality. The SNR of the phonocardiogram is high enough. Compared with two kinds of clinical stethoscopes, the performance of our designed system is satisfactory. Conclusion The system is portable. The acquisition of heart sound signal is convenient and accurate. Through intelligent terminals, this system can send heart sound data to doctors for further diagnosis.