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《Sichuan Building Science》 2010-05
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Time synchronization research of structure health monitoring by using wireless sensor( Ⅰ)

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 technolo- gy ( 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】: TU746.2
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