左心室辅助装置电力线载波通信系统研究  

Research on power-line carrier communication system of left ventricular assist device

作　　者：丁仕明 陈琛[1,2] DING Shi-ming;CHEN Chen(College of Mechanical and Electrical Engineering,Soochow University,Suzhou 215021,Jiangsu Province,China;CH Biomedical Inc.,Suzhou 215125,Jiangsu Province,China)

机构地区：[1]苏州大学机电工程学院,江苏苏州215021 [2]苏州同心医疗器械有限公司,江苏苏州215125

出　　处：《医疗卫生装备》2019年第9期12-16,28,共6页Chinese Medical Equipment Journal

基　　金：国家重点研发计划(2017YFC0111100)

摘　　要：目的:为了减少左心室辅助装置(left ventricular assist device,LVAD)与体外控制器之间经皮电缆内部导线的数量,研究一种电力线载波通信(power-line carrier communication,PLCC)系统。方法:该系统以PLCC的方式,将信号进行调制、耦合,通过电源线进行传输,在接收端通过解调器将信号解调出来。整体系统由体外控制器部分和体内转接板部分组成,主要电路包括电源电路、MCU(microcontroller unit)电路、带通滤波器电路、调制解调电路、去交流电路、运放电路等。利用LTspice软件和MATLAB软件分别对电源电路以及带通滤波器电路进行仿真,证明方案的可行性;通过Sigxplorer软件进行信号完整性分析,充分保证系统的稳定性;搭建实验平台进行功能性和误码率实验。结果:该系统实现了LVAD与体外控制器之间的载波通信功能,可以使信号经过电源线进行传输,成功把LVAD经皮电缆内部导线数量减少到2根。结论:该系统具有零误码率、功耗小、占用空间小、双向传输、可支持多个波特率、兼容性优良、工作稳定、传输效率高等优点,在植入式医疗器械领域有非常广阔的应用前景。Objective To develop a power-line carrier communication(PLCC) system to reduce the number of internal wires of the percutaneous cable between the left ventricular assist device(LVAD) and the external controller. Methods The system developed used PLCC mode for signal modulation, coupling, transmission through power line and demodulation at the receiver, which was composed of two components of external controller and in vivo adapter board. The main circuits included power circuit, microcontroller unit circuit, bandpass filter circuit, modem circuit, circuit removing AC signals, operational amplifier circuit and etc. LTspice and MATLAB software were used to simulate the power supply circuit and the filter circuit respectively to prove the feasibility of the scheme;the signal integrity(SI) was analyzed by Sigxplorer software to ensure the stability of the system;an platform was established for functional and bit error rate(BER) experiments. Results The carrier communication function was realized between the LVAD and the external controller, the control signal could be transmitted through the power line, and the number of internal wires of the LVAD percutaneous cable was successfully reduced to two.Conclusion The system gains advantages in BER, power consumption, space involved, bi-directional transmission, compatibility with multi band rates, stability and efficiency, and thus is worthy promoting in the field of implanted medical device.

关 键 词：左心室辅助装置 电力线载波通信 体外控制器 植入式医疗器械 心血管疾病治疗 

分 类 号：R318[医药卫生—生物医学工程] R197.39[医药卫生—基础医学]