共查询到19条相似文献,搜索用时 78 毫秒
1.
通过对无线传感器网络的研究和分析,同时结合低成本和低功耗的市场需求,搭建了软硬件平台,构建了一个基于TI CC430F5137的433MHz无线传感器网络,从而为无线传感器网络的实际应用提供了一种解决方案.描述了无线传感器网络的起源和特点,对比了其常用技术ZigBee和433MHz.同时基于CC430 F5137的典型应用,提出了整个传感器网络的软硬件及网络结构.结果表明,在低成本和低功耗的前提下,对该无线传感器网络的性能进行了充分的展示,最后验证了其在节水灌溉具体应用中的可行性. 相似文献
2.
3.
4.
无线传感器网络节点的设计与实现 总被引:2,自引:0,他引:2
设计了一种具有质量轻、体积小、低成本、低能耗的无线传感器网络节点。该节点由MSP430单片机、CC2420射频收发器、FT232BM转换芯片、SHT11温度湿度传感器、外围芯片、电源电路以及JTAG调试接口组成。通过JTAG调试,以及安装TinyOS操作系统,节点较好地实现了数据采集、无线传输以及无线网络功能。 相似文献
5.
基于MSP430与CC2420的无线传感器网络的硬件节点设计 总被引:1,自引:0,他引:1
传感器节点是组成无线传感器网络的基本单位.本文通过对传感器硬件节点的分析,以射频芯片CC2420为核心,设计了一种基于CC2420与MSP430单片机的无线传感器网络的硬件节点设计方案。 相似文献
6.
7.
8.
9.
10.
11.
12.
提出一种基于ZigBee协议的用于测量温度的无线传感器网络方案,方案中使用CC2530无线芯片和温度传感器DS 18B20搭建了一个基于ZigBee协议栈的无线传感器网络.该网络由一个协调器充当中心节点和若干个终端节点一起,构成一个星型网络,给出了传感器节点、协调器节点的硬件设计原理图及软件流程图.实验证明节点性能良好、通信可靠,通信距离明显增大. 相似文献
13.
14.
文中给出了基于ZigBee技术的无线传感器网络网关的设计方案。网关节点以微芯公司的PIC24FJ128GA010单片机为MCU,射频芯片为MRF24J40MA,采用串口转以太网模块达到协议转换的目的。软件方面采用微芯的开源ZigBee协议栈。 相似文献
15.
ZigBee作为一种新兴的无线传感网络技术,具有低功耗、低复杂度、低传输速率、低成本、近距离传输等特点,实现起来简单,并且具备自组网功能,新传感器节点入网无需人工配置,考虑了系统异常的情况,在无线环境监测系统中得到广泛的应用。本文章设计了基于ZigBee无线传感网络的环境监测系统,即对环境中的温度和气体烟雾进行监测。该检测系统由传感器节点和协调器节点两部分组成,其结果由协调器传输给PC机来显示,从而完成对温度和气体烟雾的无线监测。经过多次可靠性试验,本系统已成功应用于某型号监测系统。 相似文献
16.
《AEUE-International Journal of Electronics and Communications》2014,68(7):578-580
Indoor localization systems are becoming very popular because they enable the creation of very interesting location-based applications. This paper provides a short introduction about localization systems based on a sensor network and the actual state of the art. Important topics related to indoor localization like the necessary infrastructure, available technologies and their expected accuracy are treated. Additionally, the results of previous work referred to the performance evaluation of localization algorithms are shortly described. Finally, some ideas related to further investigations are presented. 相似文献
17.
T. Rama Rao D. Balachander Tiwari Nishesh M. V. S. N. Prasad 《Telecommunication Systems》2014,56(3):347-355
Near to ground radio frequency (RF) propagation path gain (PG) measurements at short distances at antenna height of 50 cm from the ground/floor were made in typical narrow and wide straight indoor corridors at 433/868/915/2400 MHz in a modern multi-storied building. The measurement was performed utilizing RF equipment and comparisons were made with Matlab simulations of ray tracing technique, free space model and ITU-R model along with Full-3D ray tracing model of Wireless Insite (WI) software. Measured PG values showed good agreement with WI in all cases. Path loss exponent (PE) values ranging from 1.22 to 2.13 were observed from the measured data. The research work reported in this paper is predominately geared towards characterizing radio link for wireless sensor networks in typical indoor corridor environments. 相似文献
18.
Juan Xu Changjun Jiang Aihuang Guo Yongfa Hong Shu Li Xingzhen Bai 《Wireless Networks》2010,16(6):1739-1748
The asymptotic lower bounds on the lifetime of time hopping impulse radio ultra wide band (TH-IR UWB) wireless sensor networks are derived using percolation theory arguments. It is shown that for static dense TH-IR UWB wireless sensor network, which sensor nodes are distributed in a square of unit area according to a Poisson point process of intensity n, the lower bound on the lifetime is \( \Upomega \left( {\left( {{{\sqrt n } \mathord{\left/ {\vphantom {{\sqrt n } {\log \sqrt n }}} \right. \kern-\nulldelimiterspace} {\log \sqrt n }}} \right)^{\alpha - 2} } \right) \), where α > 2 is the path loss exponent, thus dense TH-IR UWB wireless sensor network is fit to be employed in large-scale network. For static extended TH-IR UWB wireless sensor network which sensor nodes are distributed in a square \( \left[ {0,\sqrt n } \right] \times \left[ {0,\sqrt n } \right] \) according to a Poisson point process of unit intensity, the lower bound on the lifetime is \( \Upomega \left( {{{\left( {\log \sqrt n } \right)^{2 - \alpha } } \mathord{\left/ {\vphantom {{\left( {\log \sqrt n } \right)^{2 - \alpha } } n}} \right. \kern-\nulldelimiterspace} n}} \right) \), therefore large-scale extended network will lead to shorten network lifetime. The results also indicate that the lower bound on the lifetime in the ideal case is longer than that of a static network by a factor of \( n^{1/2} \left( {\log \sqrt n } \right)^{\alpha - 4} \). Hence mobility of sensor nodes can improve network lifetime. 相似文献
19.
Wireless Networks - An efficient routing protocol for a wireless sensor network (WSN) with multiple sinks is proposed. Sensor nodes containing three-sector antennas are deployed randomly in a... 相似文献