在研究传统家用燃气报警器的基础上，以ZigBee协议为平台，构建mesh网状网络实现网络化的智能语音报警系统。由于传感器本身的温度和实际环境温度的影响，传感器标定后采用软件补偿方法。为了减少系统费用，前端节点采用半功能节点设备，路由器和协调器采用全功能节点设备，构建mesh网络所形成的家庭内部报警系统，通过通用的电话接口连接到外部的公用电话网络，启动语音模块进行报警。实验结果表明，在2.4 GHz频率下传输，有墙等障碍物的情况下，节点的传输距离大约为35 m，能够满足家庭需要，且系统工作稳定，但在功耗方面仍需进一步改善。 Abstract: On the basis of studying traditional household gas alarm system, this paper proposed the platform for the ZigBee protocol，and constructed mesh network to achieve network-based intelligent voice alarm system. Because of the sensor temperature and the actual environment temperature, this system design used software compensation after calibrating sensor. In order to reduce system cost, semi-functional node devices were used as front-end node, however, full-function devices were used as routers and coordinator，constructed alarm system within the family by building mesh network，connected to the external public telephone network through the common telephone interface, started the voice alarm module. The results indicate that Nodes transmit about 35m in the distance in case of walls and other obstacles by 2.4GHz frequency transmission, this is able to meet family needs and work steadily, but still needs further improvement in power consumption.
上传时间： 2013-10-30
上传用户：swaylong
为满足无线网络技术具有低功耗、节点体积小、网络容量大、网络传输可靠等技术要求，设计了一种以MSP430单片机和CC2420射频收发器组成的无线传感节点。通过分析其节点组成，提出了ZigBee技术中的几种网络拓扑形式，并研究了ZigBee路由算法。针对不同的传输要求形式选用不同的网络拓扑形式可以尽大可能地减少系统成本。同时针对不同网络选用正确的ZigBee路由算法有效地减少了网络能量消耗，提高了系统的可靠性。应用试验表明，采用ZigBee方式通信可以提高传输速率且覆盖范围大，与传统的有线通信方式相比可以节约40%左右的成本。 Abstract: To improve the proposed technical requirements such as low-ower， small Nodes， large capacity and reliable network transmission， wireless sensor Nodes based on MSP430 MCU and CC2420 RF transceiver were designed. This paper provided network topology of ZigBee technology by analysing the component of the Nodes and researched ZigBee routing algorithm. Aiming at different requirements of transmission mode to choose the different network topologies form can most likely reduce the system cost. And aiming at different network to choose the correct ZigBee routing algorithm can effectively reduced the network energy consumption and improved the reliability of the system. Results show that the communication which used ZigBee mode can improve the transmission rate， cover more area and reduce 40% cost compared with traditional wired communications mode.
上传时间： 2013-10-09
上传用户：robter
Explain how to open the Waveform Viewer for Verification ? State how to insert Nodes into the Waveform Viewer ? Tell how to assign Stimulus with the Stimulator Selector
标签： Foundation 仿真
上传时间： 2013-11-05
上传用户：gps6888
Explain how to open the Waveform Viewer for Verification ? State how to insert Nodes into the Waveform Viewer ? Tell how to assign Stimulus with the Stimulator Selector
标签： Foundation 仿真
上传时间： 2013-10-29
上传用户：daguogai
IEEE1394Diag is a GUI application that presents a graphical view of an IEEE1394 network and provides the ability to perform common 1394 operations such as async reads, writes, isoc listens and talks, as well as configuration rom browsing of all Nodes present on a bus.
标签： IEEE 1394 application graphical
上传时间： 2015-04-02
上传用户：familiarsmile
本程序为tcl程序，用于以ns2模拟ad hoc network. 本程序实作50个 Nodes 在1000 * 1000公尺内随意移动的ad hoc network.
上传时间： 2014-01-27
上传用户：Thuan
libraw1394 is the only supported interface to the kernel side raw1394 of the Linux IEEE-1394 subsystem, which provides direct access to the connected 1394 buses to user space. Through libraw1394/raw1394, applications can directly send to and receive from other Nodes without requiring a kernel driver for the protocol in question.
标签： 1394 the interface supported
上传时间： 2015-08-07
上传用户：徐孺
IEEE1394Diag is a GUI application that presents a graphical view of an IEEE1394 network and provides the ability to perform common 1394 operations such as async reads, writes, isoc listens and talks, as well as configuration rom browsing of all Nodes pres
标签： IEEE 1394 application graphical
上传时间： 2014-12-03
上传用户：123啊
This section contains a brief introduction to the C language. It is intended as a tutorial on the language, and aims at getting a reader new to C started as quickly as possible. It is certainly not intended as a substitute for any of the numerous textbooks on C. 2. write a recursive function FIB (n) to find out the nth element in theFibanocci sequence number which is 1,1,2,3,5,8,13,21,34,55,…3. write the prefix and postfix form of the following infix expressiona + b – c / d + e * f – g * h / i ^ j4. write a function to count the number of Nodes in a binary tr
标签： introduction the contains intended
上传时间： 2013-12-23
上传用户：liansi
//Basic packet sending test at the MAC level, used for internal testing only. //This packet test has one node sending out a variety of //differently formatted packets to two assumed destination Nodes.
标签： packet test internal sending
上传时间： 2014-08-21
上传用户：CSUSheep
