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Research On Multipath Routing Algorithm In Strong Electromagnetic Field Environment

Posted on:2017-12-27Degree:MasterType:Thesis
Country:ChinaCandidate:X F YangFull Text:PDF
GTID:2348330488465879Subject:Signal and Information Processing
Abstract/Summary:PDF Full Text Request
Twelfth Five-year Plan of National grid development planned to build a safe and effective UHV power grid as one of the very important goal,and the traditional approach of relying on manual inspection had been unable to meet the rapid pace of development of the national grid.Real-time online monitoring of the security status of the UHV tower is an important means to ensure the national grid safety,and ultra high voltage towers are always in strong electromagnetic interference and the weak radio signal environment,therefore higher requirements on wireless data transmission reliability should be put forward.Commonly at the same time,the monitoring system of wireless sensor nodes were in a strong electromagnetic interference environment,vulnerable to be interfered,and failure at the end,thus data transmission from safeguard state of UHV transmission tower is accurate and reliable has become a problem to be solved.In this paper,based on the conditionality and limitations of the on-line monitoring system for UHV transmission tower wireless sensor network itself,we introduced multipath routing protocols,and used the algorithm improvement to improve the dependability of the WSNs data transmission.Especially when wireless sensor network is in a strong electromagnetic interference environment,its reliability cannot be guaranteed,while the multipath routing algorithm can better solved this problem.First of all,in this paper,the strong electromagnetic interference environment of wireless sensor network is are studied,UHV transmission tower itself has high voltage and low frequency,and voltage is often several orders of magnitude larger than the daily electrical equipment,and high voltage transmission line transmission voltage is usually tens of thousands of volts.Power frequency of 50 Hz is ultra-low frequency in the electromagnetic spectrum,typically,transmission line electromagnetic performed in three aspects by electric field,magnetic field and corona.In the normal operation of transmission conductor,its surrounding space will form a low frequency of alternating electric field,and has some common characteristics of electrostatic field,namely the size of the electric field intensity and voltage on the wires is proportional to the relationship.At the same time,the wireless sensor nodes are mainly affected by the electrostatic induction and electromagnetic induction.So this paper USES the finite element method(fem)simulation the strong electromagnetic environment,through the finite element modeling and solving,strong electromagnetic field distribution is analyzed.Secondly,according to the above simulation of strong electromagnetic field distribution as well as environmental impact factors,we studied the distribution of wireless sensor network signal and wireless sensor nodes failure model was constructed as also.Finally,according to the node failure model,we introduced multipath routing recovery algorithm,meanwhile multipath routing fault-tolerant model is set up.And NS2 software simulation is used to compare with the average end-to-end delay of data transmission,routing,frequency and packet transmission rate,results show that this improved multipath routing algorithm can well improve the wireless sensor network data transmission reliability,has great engineering significance and use value,and development prospect is good.
Keywords/Search Tags:UHV, wireless sensor network, strong electromagnetic interference, finite element, the node failure, multipath routing
PDF Full Text Request
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