基于Zigbee技术的无线辐射监测系统的建立

基于Zigbee技术的无线辐射监测系统可对众多辐射监测仪的监测数据进行实时采集和统计分析,无需布线,组网灵活。该辐射监测系统包括多台辐射监测仪及上位机监测平台。辐射监测仪负责测量辐射信息,并将辐射测量结果通过Zigbee模块发送出来。辐射监测平台负责接收辐射测量结果,并将数据在监测平台上进行显示和存储。对辐射监测仪和辐射监测系统进行测试,测试结果表明:辐射监测仪可对在环境本底的基础上增加0.1μSv/h的γ辐射给出可靠报警;辐射监测系统可自动进行无线网络连接,整体运行稳定,数据采集准确,可实现对各个辐射监测仪监测数据的实时采集和存储。

基于ZigBee通信网络的农机作业监测系统设计

首先,介绍了ZigBee通信网络技术,并设计了系统总体设计方案;然后,分别从转速测量模块、振动信号采集模块和割台高度检测设计了系统硬件部分;最后,针对设备节点和协调器两部分设计了ZigBee无线网络传输软件,实现了农机作业监测系统。测试结果表明:系统能够正确采集农机作业参数并通过无线网络发送到云平台,证明系统的可靠性和可行性。

基于ZigBee无线传感网络的分簇时间同步算法

在无线传感网络中,时间同步技术在信道分配、数据收发、休眠调度中都有着关键作用。目前已有的时间同步算法,有些同步精度不高,有些需要进行频繁的数据交换导致功耗过大。因此设计出能同时满足高精度和低功耗两个要求的算法势在必行。提出的算法通过改变网络拓扑结构,构造分簇函数,选出簇头,进行分簇。在新的网络拓扑中,协调器与簇头之间通过频偏补偿来保证同步的精度,簇头与成员节点之间通过三次通信消除时延进行时间同步,从而实现全网时间同步。仿真结果表明,整个网络在较低功耗下也能有较高的同步精度。

Home control system based on ZigBee wireless sensor networks

A new scheme of the home control system based on ZigBee wireless sensor networks is presented. The design and development of the software and hardware of the proposed system are given. In addition to the basic data acquisition and processing functions, the gateway supports the Bluetooth-based local interface and the general packet radio service （GPRS）-based remote interface. Users on the client service side can use a pocket PC or notebook PC to achieve real-time data acquisition and control instruction implementation, or remotely control the home control system through a mobile phone by sending a short message. The Labview graphical development environment is adopted to create PDA applications running on pocket PCs and monitoring platform established on notebook PCs. Except for the gateway, other nodes in the system work in sleep mode most of the time on the system, and thus it improves the lifetime of the whole system efficiently.

Priority Based Energy Efficient MAC Protocol by Varying Data Ratefor Wireless Body Area Network

Wireless Body Area Network(WBAN)is a cutting-edge technology that is being used in healthcare applications to monitor critical events in the human body.WBAN is a collection of in-body and on-body sensors that monitor human physical parameters such as temperature,blood pressure,pulse rate,oxygen level,body motion,and so on.They sense the data and communicate it to the Body Area Network(BAN)Coordinator.The main challenge for the WBAN is energy consumption.These issues can be addressed by implementing an effective Medium Access Control(MAC)protocol that reduces energy consumption and increases network lifetime.The purpose of the study is to minimize the energy consumption and minimize the delay using IEEE 802.15.4 standard.In our proposed work,if any critical events have occurred the proposed work is to classify and prioritize the data.We gave priority to the highly critical data to get the Guarantee Tine Slots(GTS)in IEEE 802.15.4 standard superframe to achieve greater energy efficiency.The proposed MAC provides higher data rates for critical data based on the history and current condition and also provides the best reliable service to high critical data and critical data by predicting node similarity.As an outcome,we proposed a MAC protocol for Variable Data Rates(MVDR).When compared to existing MAC protocols,the MVDR performed very well with low energy intake,less interruption,and an enhanced packet-sharing ratio.

基于Zigbee无线传感系统的设计与应用

无线传感网络(WSN)近年来在不同的领域得到了广泛的应用,基于此,采用Zigbee无线网络数据协议,搭建无线传感系统,采用TI公司的CC2530F256无线通信芯片进行硬件和软件的详细设计.可将节点数据传送至协调员或计算机终端,具备显示和控制功能,收集和分析有关数据信息.并分析其搭载不同类型传感器在环境、工业、农业、智慧城市、军事等领域的的具体应用.

基于ZigBee技术的实验室环境监控系统设计与实现

为解决计量检测实验室温湿度监测面临的效率低、误差大、不确定性强等问题,文章以无线传感器网络为基础,设计了一套基于ZigBee技术的实验室环境监控系统,实现了对计量检测实验室环境温湿度的精准采集和实时监测。实际应用结果表明,该系统能够实现对多区域环境温湿度数据的实时采集、显示、存储、超限报警、历史趋势分析等功能,运行平稳,为实验室温湿度监控提供了一种高效可行的解决方案。

System Performance of Wireless Sensor Network Using LoRa–Zigbee Hybrid Communication

Wireless sensor network(WSN)is considered as the fastest growing technology pattern in recent years because of its applicability in varied domains.Many sensor nodes with different sensing functionalities are deployed in the monitoring area to collect suitable data and transmit it to the gateway.Ensuring communications in heterogeneous WSNs,is a critical issue that needs to be studied.In this research paper,we study the system performance of a heterogeneous WSN using LoRa–Zigbee hybrid communication.Specifically,two Zigbee sensor clusters and two LoRa sensor clusters are used and combined with two Zigbee-to-LoRa converters to communicate in a network managed by a LoRa gateway.The overall system integrates many different sensors in terms of types,communication protocols,and accuracy,which can be used in many applications in realistic environments such as on land,under water,or in the air.In addition to this,a synchronous management software on ThingSpeak Web server and Blynk app is designed.In the proposed system,the token ring protocol in Zigbee network and polling mechanism in LoRa network is used.The system can operate with a packet loss rate of less than 0.5%when the communication range of the Zigbee network is 630 m,and the communication range of the LoRa network is 3.7 km.On the basis of the digital results collected on the management software,this study proves tremendous improvements in the system performance.

A Wireless Sensor Network Solution for Precision Agriculture Based on Zigbee Technology

The article has been retracted due to the investigation of complaints received against it. The Editorial Board found that substantial portions of the text quite like the one published in other journal. The problem is under investigation. This paper published in Vol.4 No.1, 2012, has been removed from this site temporally.

The ZigBee Based Wireless Sensor and Actor Network in Intelligent Space Oriented to Home Service Robot

In the study of intelligent space oriented to home service robot, an important technology is how to construct an communication network which has the characters of high reliability and easy building. In this paper, based on the characteristics of ZigBee protocol, ZigBee technology is used to construct a wireless sensor and actor network. Several intelligent services based on ZigBee wireless sensor and actor network are shown to certify the reliability of this communication network. ZigBee wireless sensor and actor network builds an information bridge for the components in the intelligent space, the spatially distributed devices are connected together seamlessly. With this network, robot can share the mass information in the intelligent space and improve its performance with 'light-packs', devices in intelligent space, such as lamp, curtain can be controlled autonomously.

Towards Interference-Aware ZigBee Transmissions in Heterogeneous Wireless Networks

Cross-technology interference(CTI)from diverse wireless networks such as ZigBee,Bluetooth,and Wi-Fi has become a severe problem in the 2.4 GHz Industrial Scientific and Medical(ISM)band.Especially,low power and lossy networks are vulnerable to the signal interferences from other aggressive wireless networks when they perform low power operations to conserve the energy consumption.This paper presents CoSense,which accurately detects ZigBee signals with a reliable signal correlation scheme in the presence of the CTI.The key concept of CoSense is to reduce false wake-ups of low power listening(LPL)by identifying the pre-defined ZigBee signatures.Our scheme is robust in the coexistence environment of diverse wireless technologies since the signal correlation works well in bad wireless channel conditions.It achieves standard compliance and transparency without any hardware and firmware changes.We have implemented CoSense on the Universal Software Radio Peripheral(USRP)platform to verify its feasibility.The experimental exploration reveals that CoSense significantly reduces the false-positive and false-negative rate under typical setting and the additional overhead is negligible.The results show that our scheme saves much energy by up to 63%in dynamic network interference scenarios where low-power ZigBee transmissions are overwhelmed by strong Wi-Fi signal interferences.

The Design of Wireless Sensor Network System based on ZigBee Technology

The paper design hardware platform based on network node, and analyze ZigBee protocol architecture and standards of each layer; on based of ZigBee protocol stack, we design the application program of network coordinator and terminal node to realize the data acquisition; design of network system has the characteristics of low cost, small volume, test results show that the mesh topology, network support, can be rapidly deployed, temperature, humidity, light intensity information of the smooth reading environment, that can be used for domestic environmental monitoring field.

Zigbee Based Wireless Sensor and Actuator Network for Service Robot Intelligent Space

Wireless sensor and actuator network is the key technology of service robot intelligent space. This paper is concerned with design and implementation of a ZigBee based wireless sensor and actuator network (hereinafter referred to as ZWSAN), which has been applied in our service robot intelligent space successfully. Firstly, a simplified ZigBee stack applied to ZWSAN is proposed and the primitives of the stack are illustrated after a short overview of ZigBee protocols. Then the implementation of hardware module and software stack is introduced in detail as well as several representative devices integrated into ZWSAN, including environmental sensors for environmental perception, home devices controllers for device control, embedded speech recognition module for speech control, IMU module for abnormal behaviors detection and laser robot control for service robot navigation. An application example is described to demonstrate how the devices in ZWSAN to provide service cooperatively. Finally, we conclude this paper and discuss the future directions.

Impact of Self-Organizing Networks Deployment on Wireless Service Provider Businesses in China

Decoupling of revenues with network traffic and extreme penetration of expenses in wireless network leads to the critical situation for wireless service providers (WSP), as more wireless network is complex due to its heterogeneity in the context of planning, software & hardware installation, radio parameters setting, drive testing, optimization, healing and maintenance. These operations are time-consuming, labor & budget-intensive and error-prone if activated manually. Hence new approaches have to be designed and applied to meet those demands in a cost-effective way, Self-organizing networks (SON), is a promising approach to handle manual tasks with autonomous manners. More specifically the self-directed functions (self-planning, self-deployment, self-configuration, self-optimization and self-healing) are aid to reduce capital expenditure (CAPEX), implementation expenditure (IMPEX) and operational expenditure (OPEX). In this study, first we investigate the aforementioned impact factors of cost combined with self-functions. Then, we analyze the relative cost benefits causing from deploying the SON functions, using the economical method to have more precise results concerning those potential benefits. At last, the result shows that there is a significant difference in expenses and revenues of WSP with and without SON after enabling self-functions in wireless network.

基于ZigBee技术的智能家居无线网络系统设计

文章设计了一个基于ZigBee技术的智能家居无线网络系统,用户可以通过客户端软件及Web浏览器对其进行远程控制和管理。该系统具有成本低、可靠性高、组建方便等优点,能够满足用户对智能家居的需求,具有良好的应用前景。

基于STM32和ZigBee网络的智能家居系统

针对目前智能家居成本高、扩展性和兼容性差等问题,设计了一套基于物联网的智能家居系统。系统采用CC2530单片机构建ZigBee无线网络,STM32单片机构建主控制器,搭配温湿度和空气质量等传感器,实现了室内环境数据的无线采集和对家电的远程控制。主控制器负责通过ZigBee无线网络汇总传感器采集的数据,通过TFT触摸屏实现本地的人机交互,通过GSM模块和MQTT协议实现与服务器的数据交换。服务器端数据存储在MySQL数据库中,用户端通过MQTT服务实时获取服务器端数据。用户可以借助TFT触摸屏在现场进行实时监测和控制,也可以在终端软件上实现同样的操作。实验表明,该系统可以有效地实现对环境的远程监控和对用电器的实时调节,系统模块兼容性好、扩展性强,具有一定的应用价值。

基于ZigBee的山区农田环境监测系统设计

针对山区农田特殊的地貌和环境,研究并设计一种基于ZigBee无线传感网络技术的农田环境监测系统。该系统通过多种传感器对山区农田环境数据进行实时监测,采集的数据可以在智能手机App端进行可视化展示,为农田智能化管理提供了参考信息,同时系统提供了远程控制农田浇水灌溉功能。该系统在枣庄市山亭区徐庄镇山区农田进行了实地测试,实验结果表明该系统能够实现对山区农田环境数据的有效监测,且该系统成本低、精度高、便于维护,有较强的可用性和可靠性。

基于ZigBee技术的家居空气质量检测系统

为解决家居环境中的有毒气体对健康的潜在危害,文章设计了一套基于ZigBee技术的家居空气质量检测系统,可以检测温湿度、CO和甲醛等参数。该系统由数据采集模块、主控制模块、报警模块和液晶显示模块组成。系统中的2个CC2530 ZigBee芯片分别作为协调器和终端与传感器及其他硬件模块配合工作。该系统可以实时监测和显示室内空气质量,对空气质量变化进行预警,实现家居环境监测。

基于ZigBee的逆变CO_(2)焊机参数遥控与群控系统设计

逆变CO_(2)焊机主要由逆变焊接电源、送丝机、遥控盒、气管和焊枪等组成,逆变焊接电源和送丝机通过6芯控制电缆连接,采用有线载波方式实现焊接参数的远程遥控。随着物联网技术的发展,逐步地构建ZigBee无线网络,实现逆变CO_(2)焊机参数遥控与群控系统,完成逆变CO_(2)焊接电源节点、送丝机节点、路由节点、协调器节点等软硬件设计以及Android应用程序的设计。试验结果表明:本文提出的系统能满足逆变CO_(2)焊机实际的控制要求,达到了参数遥控与群控的目标。

基于ZigBee的电缆接头压接缺陷监测系统设计

提出采用环式无线测温的监测系统,实现对运行电缆中间接头温度的实时测量和状态评估。使用COMSOL Multiphysics软件建立电缆中间接头电磁—热耦合三维计算模型,利用有限元分析(FEA)方法计算获得了压接缺陷下的电缆中间接头的温度变化规律;引入接触系数k表征压接缺陷程度,并给出了线芯导体温度推导公式。结果表明:当接触系数k>2.7时,电缆中间接头接触电阻较大,存在安全隐患。在此基础上,基于ZigBee技术搭建了环式无线测温监测系统,并编写了上位机程序;实验表明:监测系统测量误差最大值为0.4℃,满足实际应用需求。