【摘要】 目的:基于Zigbee的心电监护网络在成本、功耗、抗干扰性方面都有突出优势。在系统整体设计中,定位系统研究是关键技术之一。本文研究了基于Zigbee的心电监护网络中的定位问题,目的在于给出一种可行的、更加精确的定位算法。方法:国内外许多学者针对无线传感器网络的定位问题进行了大量的研究,期间也提出了很多算法,但仍有改进空间。本文的射频接收器使用Chipcon公司的CC2430无线模块作为节点收发装置,该接收器符合IEEE 802.15.4标准,2.4 GHz。研究进行了定位系统的开发和改进算法的测试。研究中节点定位采用测距算法,首先给出算法模型,并进行样本节点数据测试,最后给出样本节点的实际位置与定位算法的测试数据之间的对比结果,并通过统计分析得出研究结论。结果:测试的结果表明,改进的定位算法达到了预期的效果,测试样本节点的定位精度明显提高,具有一定的应用价值。结论:本文所提算法可以提高节点定位精确度,但仅对6个实验节点进行了算法的验证,对于心电监护系统而言,后续还需继续采用更大规模的节点进行验证。更多还原

【Abstract】 Objective:The ECG monitoring network based on Zig Bee electrocardiograph have many advantages of low cost,low power dissipation and high anti-interference ability. Positioning system is one of the key technologies in the overall design.This paper research about a kind of node localization method based on the telemonitoring networkmode to give a more accurate algorithm.Methods:A lot of research have been done about the localization method.But there is still room for improvement. The system use CC2430 wireless module as node transceiver, build a wireless sensor network platform based on Zig Bee wireless sensor network protocol for positioningsystem development and the improved algorithm. Results:The test results in wireless sensor network platform show that precision obviously improved and theimprovement wireless sensor network localization algorithm is worthy of using and achieved the anticipated effect.Conclusions:The localization algorithm of this paper can give more accrurate node distance,but large sample experiment still need to verify the algorithm.更多还原