A Smart Health Monitoring Chair for Nonintrusive Measurement of Biological Signals
A Smart Health Monitoring Chair for Nonintrusive Measurement of Biological Signals
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DOI：
10.1109/titb.2011.2175742
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发表时间：
2012-01-01
影响因子：
--
通讯作者：
Park, Kwang Suk
中科院分区：
文献类型：
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作者：
Baek, Hyun Jae;Chung, Gih Sung;Park, Kwang Suk
我们开发了同步心电图、光电容积描记图和心冲击图测量的非侵入性方法，这些方法不需要仪器与裸露皮肤之间的直接接触。这些方法被应用到设计的诊断椅不受约束的心率和血压监测的目的。我们的方法通过安装在椅背上的电容耦合电极（包括高输入阻抗放大器）和安装在座椅上的导电织物进行操作，用于电容驱动右腿电路配置，能够通过衣服记录心电图信息。通过衣服使用安装在座椅上的传感器测量光电体积描记图，该传感器具有根据衣服类型而变化的光强度的专门设计的放大器电路。心冲击图记录使用薄膜型传感器材料，聚偏二氟乙烯（PVDF），这是安装在座椅罩下面。通过同时测量信号，即使由于运动伪影而没有记录心电图，也可以监测心跳到心跳的心率。心跳到心跳的血压也监测使用无约束的测量脉冲到达时间和其他生理参数，我们的实验结果表明，估计的血压往往与实际血压测量值相吻合。该研究证明了我们的用于通过衣服进行生物信号监测的方法和设备的可行性，用于不需要用户意识并且不受身体活动限制的无约束的长期日常健康监测。
We developed nonintrusive methods for simultaneous electrocardiogram, photoplethysmogram, and ballistocardiogram measurements that do not require direct contact between instruments and bare skin. These methods were applied to the design of a diagnostic chair for unconstrained heart rate and blood pressure monitoring purposes. Our methods were operationalized through capacitively coupled electrodes installed in the chair back that include high-input impedance amplifiers, and conductive textiles installed in the seat for capacitive driven-right-leg circuit configuration that is capable of recording electrocardiogram information through clothing. Photoplethysmograms were measured through clothing using seat mounted sensors with specially designed amplifier circuits that vary in light intensity according to clothing type. Ballistocardiograms were recorded using a film type transducer material, polyvinylidenefluoride (PVDF), which was installed beneath the seat cover. By simultaneously measuring signals, beat-to-beat heart rates could be monitored even when electrocardiograms were not recorded due to movement artifacts. Beat-to-beat blood pressure was also monitored using unconstrained measurements of pulse arrival time and other physiological parameters, and our experimental results indicated that the estimated blood pressure tended to coincide with actual blood pressure measurements. This study demonstrates the feasibility of our method and device for biological signal monitoring through clothing for unconstrained long-term daily health monitoring that does not require user awareness and is not limited by physical activity.