LIU Jian, QIU Jin-hao, CHANG Wei-jie, et al. Study of directivity of metal-core piezoelectric fiber sensing Lamb waves[J]. 2011, 30(2): 54-56+67. DOI: 10.13873/j.1000-97872011.02.014.
Metal-core piezoelectric ceramic fiber(MPF) is a new type of piezoelectric ceramic device.The calculating principle of Lamb wave energy factor based on wavelet transform is introduced.MPF is used as sensor of Lamb wave.The directivity of MPF sensing Lamb wave is researched using amplitude and wavelet transform energy factor method respectively.Results show that MPF has high directivity to sense Lamb wave
the directivity characterized by wavelet transformation energy factor shows more clear in comparison with amplitude.