A portable magnetic induction measurement system (PIMS)
A portable magnetic induction measurement system (PIMS)
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DOI：
10.1515/bmt-2011-0064
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发表时间：
2012-04-01
影响因子：
1.7
通讯作者：
Leonhardt, Steffen
中科院分区：
文献类型：
--
作者：
Cordes, Axel;Foussier, Jerome;Leonhardt, Steffen
对于通气和心脏活动的非接触式监测，磁感应测量适用。由于该技术对人体无害，因此非常适合长期监测解决方案，例如：例如，在一个实施例中，床旁监测、家庭护理患者的监测以及从事关键职业的人员的监测。对于这种设置，已经开发了一种双通道便携式磁感应系统，该系统体积小，重量轻，足以安装在椅子或床上。由于解调、控制和滤波在前端数字信号处理器上实现，因此不需要PC（除了在研发期间进行可视化/数据存储）。该系统可以连接到局域网（LAN）或无线网络（WiFi），允许将多个设备连接到大型监控系统，例如。例如，在一个实施例中，对于老年人住宅或医院，低风险患者不需要标准ECG监测。为了可视化数据流，开发了一个基于Qt的（芬兰埃斯波诺基亚的Qt框架）监控应用程序，该应用程序运行在上网本计算机、笔记本电脑或标准PC上。为了感应和测量磁场，需要外部线圈和放大器。本文介绍了该系统，并提出了监测呼吸和心脏活动（沙发）床和呼吸监测在椅子上的结果。在测量过程中检查了平面配置和正交线圈设置。将测量数据通过LAN流传输到运行Matlab的监测PC（The MathWorks Inc，Natick，MA，USA）。
For contactless monitoring of ventilation and heart activity, magnetic induction measurements are applicable. As the technique is harmless for the human body, it is well suited for long-term monitoring solutions, e. g., bedside monitoring, monitoring of home care patients, and the monitoring of persons in critical occupations. For such settings, a two-channel portable magnetic induction system has been developed, which is small and light enough to be fitted in a chair or bed. Because demodulation, control, and filtering are implemented on a front-end digital signal processor, a PC is not required (except for visualization/data storage during research and development). The system can be connected to a local area network (LAN) or wireless network (WiFi), allowing to connect several devices to a large monitoring system, e. g., for a residential home for the elderly or a hospital with low-risk patients not requiring standard ECG monitoring. To visualize data streams, a Qt-based (Qt-framework by Nokia, Espoo, Finland) monitoring application has been developed, which runs on Netbook computers, laptops, or standard PCs. To induce and measure the magnetic fields, external coils and amplifiers are required. This article describes the system and presents results for monitoring respiration and heart activity in a (divan) bed and for respiration monitoring in a chair. Planar configurations and orthogonal coil setups were examined during the measurement procedures. The measurement data were streamed over a LAN to a monitoring PC running Matlab (The MathWorks Inc, Natick, MA, USA).