Lopez-Iturri Peio, Aguirre Erik, Azpilicueta Leire, Astrain José J, Villadangos Jesús, Falcone Francisco
Electrical and Electronic Engineering Department, Public University of Navarre, Pamplona 31006, Spain.
Computer and Mathematics Engineering Department, Public University of Navarre, Pamplona 31006, Spain.
Sensors (Basel). 2014 Dec 12;14(12):24004-28. doi: 10.3390/s141224004.
In this work, the characterization of the radio channel for ISM 2.4GHz Wireless Sensor Networks (WSNs) for judo applications is presented. The environments where judo activity is held are usually complex indoor scenarios in terms of radiopropagation due to their morphology, the presence of humans and the electromagnetic interference generated by personal portable devices, wireless microphones and other wireless systems used by the media. For the assessment of the impact that the topology and the morphology of these environments have on electromagnetic propagation, an in-house developed 3D ray-launching software has been used in this study. Time domain results as well as estimations of received power level have been obtained for the complete volume of a training venue of a local judo club's facilities with a contest area with the dimensions specified by the International Judo Federation (IJF) for international competitions. The obtained simulation results have been compared with measurements, which have been carried out deploying ZigBee-compliant XBee Pro modules at presented scenario, using approved Judogis (jacket, trousers and belt). The analysis is completed with the inclusion of an in-house human body computational model. Such analysis has allowed the design and development of an in house application devoted to monitor the practice of judo, in order to aid referee activities, training routines and to enhance spectator experience.
在这项工作中，介绍了用于柔道应用的2.4GHz工业、科学和医疗（ISM）频段无线传感器网络（WSN）的无线信道特性。由于其形态、人员的存在以及个人便携式设备、无线麦克风和媒体使用的其他无线系统产生的电磁干扰，举办柔道活动的环境在无线电传播方面通常是复杂的室内场景。为了评估这些环境的拓扑结构和形态对电磁传播的影响，本研究使用了自行开发的三维射线发射软件。对于当地柔道俱乐部设施中一个训练场地的整个空间，已获得时域结果以及接收功率电平估计值，该场地设有符合国际柔道联合会（IJF）规定的国际比赛尺寸的竞赛区域。已将获得的模拟结果与测量结果进行比较，测量是在上述场景中使用符合ZigBee标准的XBee Pro模块、穿着经批准的柔道服（夹克、裤子和腰带）进行的。通过纳入一个人体计算模型完成了分析。这样的分析有助于设计和开发一个用于监测柔道练习的内部应用程序，以协助裁判工作、训练流程并提升观众体验。
