Vanveerdeghem Peter, Van Torre Patrick, Stevens Christiaan, Knockaert Jos, Rogier Hendrik
Department of Information Technology (INTEC), Ghent University, St. Pietersnieuwstraat 41, 9000 Ghent, Belgium.
Department of Industrial System and Product Design (ISP), Ghent University, Graaf Karel de Goedelaan 5, 8500 Kortrijk, Belgium.
Sensors (Basel). 2014 Oct 9;14(10):18583-610. doi: 10.3390/s141018583.
A novel, fully-autonomous, wearable, wireless sensor network is presented, where each flexible textile node performs cooperative synchronous acquisition and distributed event detection. Computationally efficient situational-awareness algorithms are implemented on the low-power microcontroller present on each flexible node. The detected events are wirelessly transmitted to a base station, directly, as well as forwarded by other on-body nodes. For each node, a dual-polarized textile patch antenna serves as a platform for the flexible electronic circuitry. Therefore, the system is particularly suitable for comfortable and unobtrusive integration into garments. In the meantime, polarization diversity can be exploited to improve the reliability and energy-efficiency of the wireless transmission. Extensive experiments in realistic conditions have demonstrated that this new autonomous, body-centric, textile-antenna, wireless sensor network is able to correctly detect different operating conditions of a firefighter during an intervention. By relying on four network nodes integrated into the protective garment, this functionality is implemented locally, on the body, and in real time. In addition, the received sensor data are reliably transferred to a central access point at the command post, for more detailed and more comprehensive real-time visualization. This information provides coordinators and commanders with situational awareness of the entire rescue operation. A statistical analysis of measured on-body node-to-node, as well as off-body person-to-person channels is included, confirming the reliability of the communication system.
本文提出了一种新型的、完全自主的、可穿戴的无线传感器网络，其中每个柔性纺织节点执行协作同步采集和分布式事件检测。在每个柔性节点上的低功耗微控制器上实现了计算高效的态势感知算法。检测到的事件直接无线传输到基站，也可由其他身体上的节点转发。对于每个节点，双极化纺织贴片天线作为柔性电子电路的平台。因此，该系统特别适合舒适且不引人注意地集成到服装中。同时，可以利用极化分集来提高无线传输的可靠性和能效。在实际条件下进行的大量实验表明，这种新型的自主式、以身体为中心的、纺织天线无线传感器网络能够在干预期间正确检测消防员的不同操作状态。通过将四个网络节点集成到防护服中，该功能在身体上本地实时实现。此外，接收到的传感器数据可靠地传输到指挥所的中央接入点，以进行更详细、更全面的实时可视化。这些信息为协调员和指挥官提供了整个救援行动的态势感知。还包括对测量的身体上节点到节点以及身体外人员到人员信道的统计分析，证实了通信系统的可靠性。
