Abstract: A method of magnetostrictive (MS) guided wave testing of a ferromagnetic structure. One or more MS transmitters, each configured as a patch of ferromagnetic material, are acoustically coupled to the structure. Each MS transmitter is magnetized to produce a bias magnetic field in the patch. One or more MS receivers are acoustically coupled to the structure in a location remote from the MS transmitter(s). An alternating current (AC) is applied to the structure, thereby producing time-varying magnetic fields and MS vibrations in the MS transmitter(s) resulting in guided waves in the structure. MS response signals are received at the MS receiver(s), indicating whether the structure has any anomalies.

Abstract: A method of magnetostrictive (MS) guided wave testing of a ferromagnetic structure. One or more MS transmitters, each configured as a patch of ferromagnetic material, are acoustically coupled to the structure. Each MS transmitter is magnetized to produce a bias magnetic field in the patch. One or more MS receivers are acoustically coupled to the structure in a location remote from the MS transmitter(s). An alternating current (AC) is applied to the structure, thereby producing time-varying magnetic fields and MS vibrations in the MS transmitter(s) resulting in guided waves in the structure. MS response signals are received at the MS receiver(s), indicating whether the structure has any anomalies.

Abstract: The system and method provides means for detecting fiber optic cable embedded within a structure such as a wall of a building. It relies upon detecting an electrical field generated by movement of static and induced electrical charged fiber optic cable contained within the building wall. The invention is particularly useful when only one side of a wall structure is accessible and there is no access to the fiber optic cable. The process comprises the steps of locating wall studs, making a small hole in the wall material between the wall studs at approximately mid height, inserting a field emitter in the small hole for generating an electrical charge on a fiber cable, inserting an air nozzle in the small hole to create fiber cable movement, and detecting an electric field generated by the movement of an electrically charged fiber cable.