公开(公告)号：WO2018106194A1

公开(公告)日：2018-06-14

申请号：PCT/SG2017/050610

申请日：2017-12-11

Applicant: NANYANG TECHNOLOGICAL UNIVERSITY

Inventor： HU, Xiao ,  MU, Chenzhong ,  ZHANG, Liying

IPC: G01N22/00 ,  G01R27/26 ,  G01N23/02 ,  G01N21/88 ,  G01N27/24 ,  G01N27/82

Abstract: A non-destructive testing method of analyzing a sample comprising a composite material is disclosed. The method comprises: emitting an electromagnetic signal onto the sample, the electromagnetic signal having a range of frequencies; detecting a response signal transmitted and / or reflected by the sample in response to the electromagnetic signal; processing the response signal to determine variation with frequency of a dielectric permittivity of the sample over the range of frequencies; and determining an indication of a structural characteristic of the sample from a measure of the variation with frequency of the dielectric permittivity of the sample.