Air Void Detection Using Variational Mode Decomposition With Low Rank

Authors

Fok Hing Chi Tivive, University of WollongongFollow
Abdesselam Bouzerdoum, University of WollongongFollow
Shivakumar Karekal, University of WollongongFollow

RIS ID

141499

Publication Details

F. Tivive , A. Bouzerdoum & S. Karekal, "Air Void Detection Using Variational Mode Decomposition With Low Rank," IEEE Sensors Journal, vol. 20, (5) pp. 2600-2607, 2020.

Abstract

This paper presents an air-void detection technique for air-coupled radar, which emits electromagnetic waves to interrogate an air-void inside a medium or between two media. The reflections from the air-medium interfaces are usually corrupted by air-coupling, antenna ringing, and internal reflections, rendering air-void detection very difficult or, in certain cases, impossible. The proposed method exploits the low-rank structure of the background clutter to suppress these nuisance signals. A variational mode decomposition model is developed to extract the backscattering at different air-medium interfaces as signal modes. Real experiments are conducted using a stepped frequency radar. The experimental results show that the proposed method can detect air-gap between two sand blocks.