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Study On The Key Technology Of Digital Wireless Monitoring System In Slope Engineering

Posted on:2011-05-11Degree:DoctorType:Dissertation
Country:ChinaCandidate:S B LiuFull Text:PDF
GTID:1118360308469278Subject:Engineering Mechanics
Abstract/Summary:PDF Full Text Request
At present, monitoring data is mostly transmitted via wire technology in slope monitoring, which is not convenient for monitoring work. Although GPRS wireless technology is applied in some slope engineering, this method is limited in the use of slope monitoring with few monitoring nodes or monitoring parameters.To solve the above problems, slope monitoring with multiple monitoring nodes and monitoring parameters will be taken as research object and monitoring data will be sent by Wireless Sensor Networks in this article. The main research contents are routing protocol, data aggregation and remote data transmission which are suitable for slope monitoring. The main conclusions and results are listed below:1. A wireless data transmission method of slope monitoring based on ZigBee technology is proposed. The method has the advantages of low power consumption, good scalability, self-organization networks, strong self-repair ability, large capacity, low costs of nodes manufacturing and operating, which is more advanced than the technology of Bluetooth, WiFi, mobile communications. The method can meet the demand of wireless slope monitoring with multiple monitoring spots and multiple monitoring variables.2. A routing algorithm of slope monitoring networks based on improved APTEEN protocol is designed. With the combination of routing feature based on geographic information in GEAR protocol, the algorithm has the advantages of two methods of data transmission based on reactive strategy and proactive strategy and nodes administration of multiple levels strategy such as non-cluster node, cluster node and Sink node, which is suitable for slope monitoring. To prove the feasibility of routing algorithm, the famous open-source software OMNeT++ is used to simulate and the validation and scalability of routing algorithm is proved in its simulation results.3. A data aggregation algorithm of slope monitoring networks based on improved centralized Kalman filter is designed. The algorithm realized on cluster nodes or Sink node takes advantage of the feature of monitoring data transmitted to cluster nodes or Sink node in slope routing protocol, which improves the efficiency of data aggregation and shortens the error of monitoring data. To prove the feasibility of data aggregation algorithm, the software MATLAB is used to simulate and the validation and error correction of routing algorithm is proved in its simulation results.4. Two remote data transmission methods of slope monitoring base on mobile communication networks and WiFi-Internet networks are proposed and their data transmission flow and package strategy of data frames is described in details. The shortage of ZigBee remote data transmission can be made up by both methods and monitoring data can be transmitted from monitoring spots to remote monitoring centre.
Keywords/Search Tags:slope monitoring, wireless transmission, network routing, data aggregation, remote transmission
PDF Full Text Request
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