Advantages:
Eliminates need for subjective data analysis, Provides unit mm³ resolution, Instant 2D / 3D model visualization from measurements.
A new system and method for FWI of common-offset GPR data, particularly targeting the dimensions and infilling material of buried objects. The method is useful in situations where clear isolated diffraction hyperbolas indicate the presence of an underground object, but the object's dimensions and filling may be unknown. The present invention acquires GPR data and applies advanced numerical methods to get the depth and size of the underground object in a very accurate manner. An embodiment of the invention includes five main steps: GPR data processing, ray-based analysis to set a good initial model, 3D to 2D transformation of data, effective SW estimation, and FWI.Our inventors have developed a method for full-waveform inversion (FWI) of common-offset ground penetrating radar (GPR) data, particularly targeting the dimensions and infilling material of buried objects. We have met this long-standing need by applying state-of-the-art FWI that can estimate object size, position, inner and outer dimensions and determine the in-filling material properties (water, air, natural gas etc.). The technique can improve an initial guess of the pipe diameter to a better estimate with less than 8% misfit for pipes with inner diameters ranging from 3 to 90 centimeters and buried with a top depth of 35 centimeters. Our researchers have successfully employed this method on a number of real datasets collected in different environments. It demonstrated accurate location and depth estimation on multiple buried objects and noisy media. This method will be invaluable to industries and government agencies engaging in construction, infrastructure monitoring and quality assessment and excavation near utilities.
Brochure
