Abstract
GPR is a useful tool in non-destructive evaluation area. Time delay curve detection and target depth estimation are two key steps in GPR data processing procedure, as they can provide accurate target depth information, especially in multi-layer medium detection scenario. Traditional methods for time-delay curve are applicable to homogeneous medium and ideal environments. This paper presents a new time-delay curve extracting approximation hyperbola algorithm (TDC-AH) and target depth algorithm. By applying auto-detecting edge points criterion in detection scenario, an approximation hyperbola equation can be established and target depth can be estimated subsequently. Simulating experiment proves the proposed algorithm is suitable for multi-layer medium.
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