Ground-Penetrating Radar (GPR) uses pulses of electromagnetic energy to produce a continuous cross-sectional image of what the human eye cannot see. When the energy reflects off an object, the returning signal is used to construct a real-time image of what lies beneath; the image is determined by the depth and composition of whatever item the energy contacts. In the absence of an embedded item, GPR can also detect cracks and voids in a variety of materials, including concrete, pavement, rock and soil. The technology provides immediate, precise and non-destructive results, eliminating the need preemptive drilling, probing or digging.
The required radar frequencies for an accurate GPR survey depend on the application and materials involved. Low frequencies are ideal for large and deep targets, while high frequencies are used to map targets that are small and shallow.
Affordable, Safe, Fast and Accurate
Thanks to advances in computers and software, GPR is evolving rapidly and its benefits as an investigative tool are becoming even more impressive. In the past decade, the technology has become faster, more efficient and cheaper than X-rays, all while maintaining a critical advantage in safety: GPR does not expose technicians to harmful radiation. Furthermore, where X-ray’s film process limits its application to structures with two accessible sides, ground-penetrating radar yields reliable images from just one angle.