INDUCTION-FREE DIGITAL ELECTROCARDIOGRAPHY BY OPTICAL INFORMATION TECHNOLOGY

光电子信息技术（O-IT）得到了巨大的发展。在本研究计划中，开发了O-IT在生物医学技术中的应用。在众多可能的应用中，主要是开发一种新型的心电图模型，心电图机是获取人体心脏动作电位的重要诊断设备。它通常有12个电极和连接的电缆，然后在多通道笔式记录仪上显示心电信号波形，以检查人体心脏的状态。由于电极和设备通过电线连接，电磁感应噪声是一个非常重要的问题。移动的电话等电子设备可能会产生与心电设备类似的噪声，本项目中心电信号通过光信号传输，而不是通过电线传输，以避免感应噪声。人类心脏调制器的潜力 ...更多信息 从而发光二极管和它的光在露天中从患者传播到接收设备。为了提供多通道测量，提出了几种光学多通道传输方案。这些是波分复用（WDM），时分复用（TDM）和码分复用（CDM）系统。TDM需要同步信号。实现了一种从照明荧光灯获得同步信号的简单方法。CDM方案是最适合于多通道传输的方案，本课题主要阐述了发光式数字心电图机的工作原理，提出了可能的多通道传输方案并进行了试验。总之，多通道发光数字心电图是由最近开发的O-IT实现的，并被发现是非常有效的测量生物医学领域的静态电位。它可以成为医院和诊所的重要诊断设备。少

The optoelectronic information technology (O-IT) has done a tremendous development. In this research project, an application of O-IT to the biomedical technology is developed. Among many possible applications, a novel model of electrocardiography is mainly developed.The electrocardiograph is an important diagnostic equipment to obtain the human action potential due to the heart. Usually, it has twelve electrodes and connected electrical cables, and then it displays a cardiographic signal waveform on a multichannel pen-recorder to check the status of human heart. Since the electrodes and the apparatus are connected by electric wires, the electromagnetic induction noise is a very important problem. The mobile telephones and other electronic equipments may cause the similar noise to the cardiographic equipment.In this project, the electrocardiographic signal is transmitted via optical signal, not by the electrical wire, to avoid the induction noise. The potential of the human heart modula … More ted the lightemitting diode and its light propagates in open air from the patient to the receiving apparatus. To provide the multichannel measurement, several methods of the optical multichannel transmission schemes are proposed. These are the wavelength-division (WDM), time-division (TDM) and code-division (CDM) multiplex system.The WDM is found to be very simple but is difficult for the multichannel scheme. The TDM necessitates the synchronization signal. An easy method to get the synchronizing signal from the illuminating fluorescent lamp is realized. The CDM scheme is the most adequate for the multichannel purpose.In this project, the principle of the lightemitting digital cardiograph is demonstrated and the possible multichannel transmission schemes are proposed and tested. In conclusion, the multichannel lightemitting digital electrocardiography is realized by the recently developed O-IT and found to be very effective to measure the static potential on the biomedical field. It can be an important diagnostic equipments in hospitals and clinics. Less