Wireless Power Transfer based Tx-Rx Probe Frequency Feature Extraction for Non-destructive Testing and Evaluation

EasyChair Preprint no. 1268

Abstract

Wireless power transfer (WPT) based eddy current can be applied for metal defect detection because of its resonance point attainment and frequency splitting nature due to coupling effect. Of recent, it has started been applied for metal detection. However, metallic crack detection and characterization remain a great bared challenge. Therefore, an eddy-current influence from resonance WPT is proposed in this research to quantify the cracks in a metallic sample using splitting frequency features. Two coils for transmitter and receiver are configured based on resonance inductive power transfer to act as an eddy current probe. It then scanned an Aluminium sample over 3 cracks area after a vector network analyzer is connected to transmitter and receiver unit. The magnitudes of the transmission coefficient for the two coils configuration is measured at every scan point. Point base-features are extracted from the data and the principal components analysis (PCA) also mapped its extracted feature to spatial position for comparison. The results illustrated that the magnitudes of transmission coefficient (S12) depend on geometrical nature, conductivity and permeability of the material. Also, the depth of each crack is inversely proportional to the deviation of frequency at crack position from that of non-crack point. Similarly, the PCA feature shows linear dependency between crack depth and its principal component value.

Keyphrases: inductive coupling, Metallic crack, Principal Components Analysis, resonance frequency, transmission coefficient

@Booklet{EasyChair:1268,
  author = {Lawal Daura and Guiyun Tian},
  title = {Wireless Power Transfer based Tx-Rx Probe Frequency Feature Extraction for Non-destructive Testing and Evaluation},
  howpublished = {EasyChair Preprint no. 1268},

  year = {EasyChair, 2019}}