Nondestructive Test Methods

Video Inspection
Videoscope / Borescope / Fiberscope

WDP uses the latest in video inspection technology. WDP's videoscope, otherwise known as a borescope or fiberscope, is a flexible, fiber-optic bundle used to examine areas not readily accessible or viewable with the naked eye. The wide-angle lens ensures maximum viewing within small areas. Light is provided internally by a high output white LED. Video and/or still pictures are recorded and stored in a USB drive and are easily viewable on a computer. The scan is also displayed in real time so the condition of the area being probed is readily assessed.

The videoscope has many applications. Specifically, WDP examined a shotcrete retaining wall in select areas that were "suspect" or noted as likely having voids based on impact-echo testing. A fiberscope, as shown in the figure below, was used to verify impact-echo signals and to quantify the extent of repairable area. Drilled holes, 3⁄4 inches in diameter and approximately 12 inches deep, were examined. The scope allowed for verification of the signals while incurring the least amount of damage possible, as opposed to more destructive coring and visual inspection. The videoscope is also used to inspect tendon deterioration within ducts, as well as many other applications where access is limited.