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State College, PA, United States

FBS, Inc. and Koch Heat Transfer Company | Date: 2014-03-14

A magnetostrictive transducer assembly for generating a longitudinal elastic guided wave of a selected frequency and mode and for guiding the wave into an open end of a heat exchanger tube for testing the tube. The transducer assembly comprises a current-carrying coil of wire, a magnetostrictive material wrapped around the coil of wire, a mechanism for pressing the magnetostrictive material against an inner surface of the tube, and one or more biasing magnets placed in the vicinity of the current-carrying coil of wire and the magnetostrictive material.

A method includes calculating, using a processor, an impedance or forward and reflected power coefficients of a phased system including a plurality of actuators disposed on a structure; and activating the plurality of actuators disposed on the structure to produce shear stress via ultrasonic continuous wave activation to at least one of delaminate or weaken an adhesion strength of a contamination on the structure.

A method for ultrasonic guided wave defect detection in a plate-like structure is disclosed. The method includes driving a plurality of transducers to cause guided waves to be transmitted in the plate in a predetermined direction or focused at a predetermined focal point, receiving at least one reflected guided wave signal, and processing the at least one reflected guided wave signal to identify a location of at least one possible defect in the plate-like structure. Defect detection data including the location of the at least one possible defect in the plate-like structure is stored in a machine readable storage medium.

Agency: Department of Defense | Branch: Navy | Program: SBIR | Phase: Phase II | Award Amount: 599.91K | Year: 2012

The recent use of materials, such as 5xxx-series aluminum in new ships is posing new challenges in inspection for the Navy; as future performance of these materials over time is not as well known. Current state of the art off the shelf techniques have not proven to be viable options for monitoring these newly implemented materials and structures. FBS is proposing to investigate both guided wave computed tomography and phased array sensor systems to monitor large areas of the structure for corrosion damage. FBS also proposes the use of a new and novel Magnetostrictive sensor for large area shear wave tomographic imaging. The newly designed sensors are thin, light weight, cost effective, and rugged, while also being powerful and having excellent mode control. Lastly, FBS has received support from both a prime manufacturer of ships and also a prime manufacturer of NDT equipment to strengthen the commercialization potential of the final product.

Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase I | Award Amount: 149.92K | Year: 2015

ABSTRACT: The inspection requirements for the Air Force legacy fleets are becoming increasingly time-consuming. One of the driving forces of the lengthy inspection process is the inefficiency of current NDI systems in scanning very large areas due to the fact that traditional NDI systems are designed to inspect only directly beneath the probe or within a very small area around the probe, and thus inspection procedures developed for these traditional systems require tedious scanning of large regions. FBS proposes a guided wave phased array technology for rapid large-area inspection of aircraft outer mold lines for cracking and corrosion, which provides a radar-like inspection scan of an area up to 20 feet in diameter using patent-pending technology. Bulk wave phased array has revolutionized the ultrasonic testing of structures through their thickness by rapidly providing sector scans that are more intuitive than a traditional ultrasonic A-scan. In this same way, FBS has developed probes and technology that will revolutionize guided wave inspection by rapidly scanning large plates from a single probe position. The current technology is being developed for Navy ship hull inspection, but probe and hardware redesigns would allow this technology to be implemented for rapid inspections of large areas of aircraft.; BENEFIT: The proposed system will improve the efficiency of aircraft outer mold line inspection by rapidly generating radar-like scans of large areas. This technology would be applicable to fuselage sections, control surfaces, engine and fuel nacelles, wings, and more on commercial and military aircraft. The technology could also be adapted for non-aerospace applications. This technology has a clear path to commercialization by partnering with Olympus NDT, a worldwide leader in non-destructive testing equipment, and building on an existing commercialized guided wave hardware platform.

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