IEEE Trans Biomed Circuits Syst. 2010 Oct;4(5):281-94. doi: 10.1109/TBCAS.2010.2052616.
Practical usability of the majority of current wearable body sensor systems for multiple parameter physiological signal acquisition is limited by the multiple physical connections between sensors and the data-acquisition modules. In order to improve the user comfort and enable the use of these types of systems on active mobile subjects, we propose a wireless body sensor system that incorporates multiple sensors on a single node. This multisensor node includes signal acquisition, processing, and wireless data transmission fitted on multiple layers of a thin flexible substrate with a very small footprint. Considerations for design include size, form factor, reliable body attachment, good signal coupling, low power consumption, and user convenience. The prototype device measures 55 15 mm and is 3 mm thick. The unit is attached to the patient's chest, and is capable of performing simultaneous measurements of parameters, such as body motion, activity intensity, tilt, respiration, cardiac vibration, cardiac potential (ECG), heart rate, and body surface temperature. In this paper, we discuss the architecture of this system, including the multisensor hardware, the firmware, a mobile-phone receiver unit, and assembly of the first proof-of-concept prototype. Preliminary performance results on key elements of the system, such as power consumption, wireless range, algorithm efficiency, ECG signal quality for heart-rate calculations, as well as synchronous ECG and body activity signals are also presented.
当前大多数可穿戴式身体传感器系统在获取多个生理参数信号方面的实际可用性受到传感器与数据采集模块之间的多个物理连接的限制。为了提高用户舒适度并使这些类型的系统能够在活动的移动对象上使用，我们提出了一种将多个传感器集成在单个节点上的无线身体传感器系统。该多传感器节点包括信号采集、处理和无线数据传输，安装在具有非常小足迹的薄柔性基板的多个层上。设计考虑因素包括尺寸、外形因素、可靠的身体附着、良好的信号耦合、低功耗和用户便利性。该原型设备尺寸为 55 x 15 毫米，厚度为 3 毫米。该单元附着在患者的胸部，能够同时测量身体运动、活动强度、倾斜、呼吸、心脏振动、心脏电位（ECG）、心率和体表温度等参数。在本文中，我们讨论了该系统的架构，包括多传感器硬件、固件、移动电话接收单元以及第一个概念验证原型的组装。还介绍了系统关键要素的初步性能结果，例如功耗、无线范围、算法效率、用于心率计算的 ECG 信号质量以及同步的 ECG 和身体活动信号。
