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Study on Techniques of Sensor Network Oriented to Road Traffic Information Acquisition

Author: ZhangYiGang
Tutor: JiaLiMin；DongHongHui
School: Beijing Jiaotong University
Course: Safety Technology and Engineering
Keywords: Road traffic information acquisition Wireless sensor networks Node position encoder
CLC: TP212.9
Type: Master's thesis
Year: 2011
Downloads: 98
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Abstract


Road traffic control systems, road traffic information acquired growing importance. Road traffic information acquisition usually centralized data management structure, relying on a single detector (mostly rely on wired communication and power supply) as the main access to information. Because of these reasons, resulting in a relatively high cost, the road traffic information acquiring this detector emplaced lack of flexibility and a limited range of action, resulting in a smaller coverage of the road network, road traffic information acquiring, there is a lot of information Get blind spot. Semi-distributed data management structure wireless sensor network technology can be used as the main access to information throughout the sensor network, wireless communication and information fusion sensor network, reducing the cost of road traffic information acquisition, expanding a single detection The scope of the network, for more large-scale application of road traffic information to obtain technical conditions. Wireless sensor network technology used in road traffic information acquisition process is the main problem of this study. The main work is as follows: 1) by analyzing the demand for road traffic information acquisition, the definition of a wireless sensor network-RTISN obtain applications for the road traffic information and analysis of this sensor network should have a series of features, these characteristics that include common features from wireless sensor networks, and also includes the unique characteristics distinct from the application of wireless sensor networks classic. 2) the type of information provided from the node type, node, four angles of the layout of the node position and node scope to collectively describe node applications meaning road traffic information acquisition and communication node meaning of the Road Traffic act on RTISN build process and transport information fusion process. Designed by different nodes in the application of access to information, the classification of the multi-angle, type of encoding nodes RTISN. In order to meet the requirements of multi-source information acquisition, design coding of the type of information to obtain various types of information to describe the sensor network. In order to better describe the sensor network nodes in the layout position and scope, design of a node position encoder, in order to replace the conventional GPS location. 3) According to the road traffic information acquiring the level of demand, defined the RTISN in the hierarchy of the communication network is designed using a communication address and communication structure of a frame in the communication network of the RTISN tree backbone network design upper and lower star The detection network communication. Get the link communication cost and optimize the sensor network topology, network self-organization of the upper backbone network and lower detection steps were designed. Analysis of the road wireless communication environment, the design of reliable communication mechanism ask node with roadside nodes under the pavement. 4) according to the level of demand for road traffic information acquisition, defined the the information feature level fusion RTISN hierarchy structure, contrast the RTISN in feature level beneath the similarities and differences between fusion and non-destructive fusion to design a RTISN in information feature level fusion fusion strategies to meet the road traffic information for monitoring needs and research needs.

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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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