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《Sichuan Building Science》 2010-06
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Time synchronization research of structure health monitoring by using wireless sensor(Ⅱ)

ZHANG Lu1,WANG Yang2(1.Civil Engineering and Construction Management Department,Hunan University of Science and Engineering,Yongzhou 425100,China;2.School of Economics and Management,Shanghai University of Electric Power,Shanghai 200090,China)  
Time synchronization is the key problem in data acquisition using wireless sensor for structure health monitoring.A virtual experiment by SAP2000 is design in this paper to estimate the effect of structure analysis by time delay.The natural excitation technology(NExT) combined with eigensystm realization technology(ERA) and peak picking(PP) method infrequency domain is used for the modal identification.The result of the test show that even a small time delay will change the modal shape of structure identified from the experiment.In the finality,a referenced means are supposed to resolve this problem.
【CateGory Index】: TU317
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