State College, PA, United States
State College, PA, United States

Time filter

Source Type

A system for detecting ice accretion includes a probe body, at least one magnetostrictive guided wave sensor for generating and receiving shear horizontal-type guided waves supported by said probe body, and a controller. The magnetostrictive guided wave sensor includes a ferromagnetic strip, at least one sensor coil disposed adjacent to said ferromagnetic strip, and at least one biasing magnet configured to induce a biasing magnetic field in said ferromagnetic strip. The controller includes a processor in signal communication with the at least one magnetostrictive guided wave sensor. The processor configured to cause the at least one magnetostrictive guided wave sensor to generate guided waves in the body, extract at least one signal feature from a guided wave signal received by the at least one magnetostrictive guided wave sensor, and determine at least one characteristic of ice accreted on an outer surface of said probe body.


Patent
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.


An ultrasonic guided wave system for defect detection in a plate-like structure, includes at least one first circumferentially-polarized piezoelectric d_(15 )shear ring element configured to be coupled to a structure. The controller includes a machine readable storage medium and a processor in signal communication with the machine readable storage medium. The processor is configured to cause a pulse generator to pulse the at least first circumferentially-polarized piezoelectric d_(15 )shear ring element such that shear horizontal-type guided wave energy is transmitted in all directions in the plate-like structure, process at least one guided wave signal to identify the presence and location of at least one possible defect in the plate-like structure, and store the guided wave signal and defect detection data in the machine readable storage medium.


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 system for defect detection in plate like structures is disclosed. The system comprises a plurality of transducers configured to be coupled to a periphery of complex-plate structure. A controller is electrically coupled to the plurality of transducers. The controller includes a machine readable storage medium and a processor in signal communication with the machine readable storage medium. The processor is configured to generate a plurality of guided wave signals using a first set of the plurality of transducers, receive the plurality of guided wave signals at a second set of the plurality of transducers, and generate tomographic pseudo-image of structural changes of the complex-plate structure based on the plurality of guided wave signals received at the second set of the plurality of transducers.


A method for ultrasonic guided wave defect detection in a structure is disclosed. The method includes driving a plurality of transducers to cause guided waves to be transmitted in the structure in a predetermined direction or focused at a predetermined focal point, receiving at least one reflected guided wave signal, and generating image data of the structure based on the at least one reflected guided wave signal. Processed image data are generated by performing at least one of baseline image subtraction or image suppression on the image data, and a location of at least one possible defect in the structure is identified based on the processed image data.


A system for non-destructive inspection of a structure includes a magnetostrictive pulser coil and a ferromagnetic strip. The ferromagnetic strip is coupled to the structure adjacent to the pulser coil. A scanner receiver probe is located adjacent to the ferromagnetic strip. The probe includes a probe body, a position encoder, and a magnetostrictive partial loading receiver coil. A magnet applies a biasing magnetic field to the ferromagnetic strip. A pulser system generates a time-varying current in the pulser coil to induce a time-varying magnetization in the ferromagnetic strip to generate guided wave energy in the structure. The probe detects reflected guided wave energy as the probe is moved around the circumference of the structure. A processor controls the pulser system, records guided wave reflections, and process the guided wave and probe position data to generate a one-dimensional image or a two-dimensional image of anomalies in said structure.


Grant
Agency: Department of Defense | Branch: Navy | Program: SBIR | Phase: Phase II | Award Amount: 749.95K | Year: 2014

Currently available hull thickness sensors use ultrasonics and provide coverage of a single point on the hull. The sensor must then be moved over the hull while the thickness readings are monitored to detect thin areas of hull plate. These systems generally contain array type sensors; however, they are not suitable for underwater applications because of the electronics and the precision involved. FBS is proposing to develop a novel guided wave phased array transducer for large area inspection from a single probe position. The newly designed sensor could be used by divers or integrated into an underwater remotely piloted vehicle to interrogate large sections of the hull for corrosion.


An inspection system includes a magnetostrictive scanner probe, a ferromagnetic strip, at least one magnet, and a processor. The magnetostrictive scanner probe includes a probe body for supporting at least one flexible sensor coil and a position encoder. The ferromagnetic strip is configured to be coupled to a structure, and the at least one magnet is configured to apply a biasing magnetization to the ferromagnetic strip. The processor is configured to cause a time-varying current to be generated in the at least one flexible sensor coil to induce a time-varying magnetization in said ferromagnetic strip perpendicular to said biasing magnetization to generate shear horizontal-type guided wave energy into said structure, and process reflected shear horizontal-type guided wave energy received by the at least one flexible sensor coil as the probe is moved relative to said structure to generate at least one two-dimensional image of a region of said structure.


Grant
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.

Loading FBS, Inc. collaborators
Loading FBS, Inc. collaborators