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Design and Realization of Wireless Sensor Networks Terminal Testing System

Author: SangSu
Tutor: LiuDaYou
School: Jilin University
Course: Software Engineering
Keywords: Wireless sensor networks Communication performance Terminal node
CLC: TP212.9
Type: Master's thesis
Year: 2011
Downloads: 78
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Abstract


Terminal nodes of the wireless sensor network, small size, and is conducive to the deployment and monitoring features greater geographic scope or people is not easy to reach the special environment. People can obtain a large number of accurate data information in harsh environmental conditions. However, sensor nodes are still many limitations, such as power, data storage and processing capacity is low, the wireless communication is susceptible to interference problems. Due to the range of complex and changing environment of the the sensor terminal node monitoring, signal interference in the practical application of a greater impact on network performance, so the terminal node communication performance has been the people to focus on one of the issues. The research content of this paper is to test the basic functions of the terminal nodes of the wireless sensor and communication performance. This article is a gas meter smart meter reading system of wireless transmission from the actual application. Meter reading system includes five parts of a PC application systems, network protocols, platform, base station, router nodes and terminal equipment. Table terminal node responsible for collecting the user's gas using gas, these data information transmitted to the router node, to the upper platform of the base station, etc., operation of the data processing. Smart gas meter as a terminal device in the automatic meter reading system requires not only to guarantee the stability of the product during operation, the accuracy of the data acquisition and transmission, and to maintain stability of network, and the user number of the gas meter demand. Meter reading system layout process, the complexity of the physical environment in the industrial, commercial and residential areas have a great impact on the terminal communication performance of the gas meter, the terminal node collected data transmission to the router will produce errors or data loss, which makes How to determine the installation location of the router function node becomes complex. This paper studies the wireless sensor network the terminal node test system node communication performance test, according to the test results can be drawn in the actual installation of the node router function node installation location. Developed sensor network equipment, and the production process, the existence of embedded program during integration testing, it is difficult to track the test; the form and content of the network data is difficult to distinguish CHECK; production quickly detected hardware such as welding and machining quality, the above problems will lead to a function of the terminal node error or failure phenomenon. This study wireless sensor network the terminal node test system to test the basic performance of the node, according to the test results to determine whether a node in the functions to work properly. Gas meter intelligent wireless remote transmission meter reading system, as well as the gas meter terminal node in the practical application of functional and communication performance requirements proficiency test system, design the terminal nodes of wireless sensor networks. The PC part of the software testing system is divided into two parts and the software part of the terminal nodes, ie for the terminal node MSP430 microcontroller C language programming and PC applications program. The communication between the PC and the terminal node custom communication protocol test system. Test system completed a test of the basic functions of the terminal node and the node's communication performance test: (1) basic functional tests include the terminal node valve drive circuit functions of function keys, LED display, beep, EEPROMs, AD voltage detection. (2) communication performance testing means using wireless communication, the terminal node of the packet loss rate of the communication link quality, and the signal strength test under different conditions in the actual environment. Communication performance test consists of two test mode, one is connected with the PC the listener nodes directly tested with test between node A; second is the listener with the PC connected to the node set two test nodes A and B of the test parameters between two nodes A and B, the communication performance test, when the test is completed, the test results are sent to a PC connected to the listener node PC machine system the results can be analysis of the data, and save the history of the test data.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation components,parts > Transmitter ( converter),the sensor > Sensor applications
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