Abstract:
An embedded acoustic metamaterial lenses allows for ultrasonic beam-forming and high resolution identification of acoustic sources for structural health monitoring. The lenses design provides an alternative to conventional phased-array technology enabling the formation of steerable and collimated (or focused) ultrasonic beams by exploiting a single transducer. The ultrasonic beam can be steered by simply tuning the frequency of the excitation. Also, the embedded lens can be designed to achieve sub-wavelength resolution to clustered acoustic sources which is a typical scenario encountered in incipient structural damage.
Abstract:
A method and system for determination of geometric features in an object is provided. The method includes receiving at least one geometric feature response to an ultrasound beam incident on the object. The incident ultrasound beam is produced from one of a plurality of ultrasound transducers. Further, a volumetric representation of the object is generated based on a plurality of object parameters. The volumetric representation of the object and a plurality of transducer parameters are used to generate a predicted beam traversal path in the object. The predicted beam traversal path is utilized to generate a temporal map of predicted time of flight geometric feature response to the ultrasound beam. A position on the volumetric representation of the object is determined as the location of the geometric feature, when the received geometric feature response is equivalent to the predicted time of flight geometric feature response corresponding to the position.
Abstract:
An ultrasound diagnostic apparatus includes: a probe that includes a transducer array including transducers, which are activated as a first transducer group and a second transducer group, is configured to transmit ultrasound waves by at least one transducer included in the first transducer group and at least one transducer included in the second transducer group, and to detect echo signals from an object; and a controller configured to select a number of transducers to be activated in the first transducer group and in the second transducer group based on the object or a measurement result, generate echo images from the echo signals, and measure an object change movement speed, which is a speed at which a change in the object moves, from the echo images.
Abstract:
According to one embodiment, a testing device of a turbine blade includes: a non-compressive elastic medium brought into close contact with a platform of the turbine blade in a state fastened to a turbine rotor; a probe which has piezoelectric elements arranged in an array and transmits ultrasound waves toward a fastening portion of the turbine blade through the elastic medium and receives echo waves; and a display portion for imaging an internal region of the fastening portion on the basis of the echo waves and displaying the same.
Abstract:
A method of inspecting a structure is disclosed. The method generally comprises selecting a search region of a dispersion curve of the structure corresponding to one or more inspection parameters. The search region comprises at least one guided wave mode activation point not located on the dispersion curve. The method further comprises activating, using an inspection system comprising at least one transducer, a plurality of activation points located within the search region of the dispersion curve and identifying an optimal activation point for the one or more inspection parameters. The optimal activation point comprises at least one of the plurality of activation points producing an optimal response for the one or more inspection parameters.
Abstract:
A method for managing an airplane fleet is described. The method includes: (i) developing a gold body database for an airplane model for each non-destructive inspection system implemented to detect defects; (ii) inspecting, over a period of time, a plurality of candidate airplanes of the airplane model, using different types of non-destructive inspection systems and the gold body database associated with each of the different types of non-destructive inspection systems, to identify defects present on the plurality of candidate airplanes; (iii) repairing or monitoring defects detected on the plurality of candidate airplanes; (iv) conducting a trend analysis by analyzing collective defect data obtained from inspecting of plurality of candidate airplanes; and (v) maintaining the airplane fleet, which includes plurality of candidate airplanes, by performing predictive analysis using results of trend analysis.
Abstract:
Porosity of aluminum ingot can be evaluated using focused beam ultrasonic testing and/or florescent dye penetrant testing. The aluminum ingot can be machine cut to form an aluminum ingot slice prior to testing. The machine cut can be performed using a polycrystalline cutting material in a “fly cutter” configuration. The polycrystalline cutting material can comprise a diamond material. The insert can cut an aluminum ingot slice to a surface roughness finish in the range of about 7-9 micro inches.
Abstract:
A system and methods with which changes in microstructure properties such as grain size, grain elongation, texture, and porosity of materials can be determined and monitored over time to assess conditions such as stress and defects. An example system includes a number of ultrasonic transducers configured to transmit ultrasonic waves towards a target region on a specimen, a voltage source configured to excite the first and second ultrasonic transducers, and a processor configured to determine one or more properties of the specimen.
Abstract:
An inspection arrangement and an associated method for inspecting an elongate object. The arrangement includes a housing providing an interior space. The housing has an entrance and exit that are aligned. The arrangement includes a plurality of ultrasonic sensor arrays disposed to direct ultrasonic sensory pluses. Each sensor array has a plurality of ultrasonic sensors with each ultrasonic sensor positioned to direct a respective ultrasonic sensory pulse in a respective direction. The arrangement includes a fluid delivery device that delivers a coupling fluid into the interior space. The coupling fluid transmits the ultrasonic sensory pluses to the elongate object. The arrangement includes a plurality of redirecting elements associated with the plurality of ultrasonic sensor arrays. Each redirecting element is positioned such that ultrasonic sensory pluses from the respective ultrasonic sensor array proceed through the respective redirecting element and are redirected along a different direction.
Abstract:
An inspection system for inspecting a target object is disclosed. The inspection system includes an inspection module. The inspection module includes a housing, a sensor adapted to provide sensor data relating to the target object, an inspection module processor adapted to receive the sensor data from the sensor and to provide corresponding packaged data, and an inspection module interface adapted to output the packaged data from the inspection module processor. The inspection system also includes a handset adapted to selectively mechanically engage with the inspection module. The handset includes a handset processor, a handset interface adapted to receive the packaged data from the inspection module interface and to provide the packaged data to the handset processor, and a user output interface responsive to the handset processor to output information about the target object to a user based on the packaged data.