An ultrasound based measurement method includes obtaining an element of synthetic data corresponding to a focusing point in a region adjacent to a reflector by applying a synthetic focusing method to received data corresponding to an actual focusing point; and generating an image of the reflector based on the element of the synthetic data.

Advanced interconnect technologies such as Through Silicon Vias (TSVs) have become an integral part of 3-D integration. Methods and systems and provided for laser-based acoustic techniques in which a short laser pulse generates broadband acoustic waves that propagate in the TSV structure. An optical interferometer detects the surface displacement caused by the acoustic waves reflecting within the structure as well as other acoustic waves traveling near the surface that has information about the structure dimensions and irregularities, such as voids. Features of voids, such as their location, are also identified based on the characteristics of the acoustic wave as it propagates through the via. Measurements typically take few seconds per site and can be easily adopted for in-line process monitoring.

A transducer main body has, on a front end side thereof, an oscillating plane having a bent shape in a side view and corresponding to a larger-diameter curved surface formed at a bend of a laminated part. Over the oscillating plane of the transducer main body, a plurality of piezoelectric oscillators is distributed in a matrix in a bent direction and a width direction. In each oscillator group, a controlling unit switches the piezoelectric oscillators to transmission and reception piezoelectric oscillators by turns in the width direction according to a preset transmission/reception pattern and processes a received signal from the reception piezoelectric oscillator according to an aperture synthesis method.

An ultrasonic non-destructive testing method and device for rail applications uses a plurality of phased array transducers to inspect aluminothermit weld defects located in a head portion, a web portion, an ankle portion, and a toe portion of a weld of a rail section. The method includes: scanning the head portion of the weld including: a first phased array transducer positioned above the weld and a second phased array transducer positioned a distance from the first phased array transducer to provide inclined access to the weld; and scanning the toe portion of the weld including: positioning pairs of third, fourth, and fifth phased array transducers on a surface of the toe portion, such that the pairs of third, fourth and fifth phased array transducers are disposed symmetrically with one of the pair on each side of the toe portion.

According to one embodiment, a control method includes setting a transmission angle of an ultrasonic wave to a standard angle. The control method further includes transmitting an ultrasonic wave at the set transmission angle and detecting an intensity of a reflected wave from an object. The control method further includes calculating a tilt angle based on a gradient of the intensity. The tilt angle indicates a tilt of the object. The control method further includes resetting the transmission angle based on the tilt angle.

A computer with a proper program generates a phased array sequence of signals. In a pulser with delays, the signals are fed through a multiplexor into multiple water wedges that are attached to a globe valve being tested. For a sequential operation of the globe valves from the open to the closed position, ultrasonic signals are transmitted through the fluid contained in the valve and reflected back through piezo-electric crystals to the multiplexor. By summation and merger of the signals, an image can be developed of the operation of the globe valve to determine if the globe valve is operating properly. By comparing the signals received with a known standard for that globe valve, proper operation, or lack thereof, of the globe valve under test can be determined. Separation of the valve stem from the globe can also be measured.

A method for reconstructing a three-dimensional surface of a part using an ultrasonic matrix sensor including scanning the three-dimensional surface using a matrix sensor at different measurement points located at the intersection of scanning rows and of increment rows at each measurement point, acquiring a temporal row image representing a reflected wave amplitude received by each element from a selected row of the matrix sensor and acquiring a temporal column image representing a reflected wave amplitude received by each element from a selected column of the matrix sensor, constructing a two-dimensional row image for each scanning row on the basis of the temporal row images constructing a two-dimensional column image for each increment row on the basis of the temporal column images, and constructing a three-dimensional image on the basis of the two dimensional row images and of the two-dimensional column images.

A multi-scale inspection and intelligent diagnosis system and method for tunnel structural defects includes: a traveling section; a supporting section, disposed on the traveling section, and including a rotatable telescopic platform, where two mechanical arms working in parallel are disposed on the rotatable telescopic platform; an inspection section, mounted on the supporting section, and configured to perform multi-scale inspection on surface defects and internal defects in different depth ranges of a same position of a tunnel structure, and transmit inspected defect information to a control section; and the control section, configured to: construct a deep neural network-based defect diagnosis model; construct a data set by using historical surface defect and internal defect information, and train the deep neural network-based defect diagnosis model; and receive multi-scale inspection information in real time, and automatically recognize types, positions, contours, and dielectric attributes of the internal and surface defects.

An ultrasonic flaw detection device (A) includes: an ultrasonic probe (2) that emits ultrasonic waves to an inspection object (P) and detects reflected waves; a sheet material (1) attached to a surface of the inspection object and having two-dimensional patterns, the two-dimensional patterns being arranged on the inspection object and indicating positions on the inspection object; an imaging device (3) attached to the ultrasonic probe and imaging the two-dimensional patterns (1a); and a processing unit (21) that reads position information indicating a position on the inspection object from a captured image captured by the imaging device and relates a detection result of the ultrasonic probe to the position information, wherein the processing unit determines an index indicating the degree of quality of the detection result based on an air pocket area (HA) that is an area in which air pockets are shown in a predetermined area (H) of the captured image.

Network wavefield imaging methods are able to image significantly complex discontinuities or shapes in plate-like structures for superior ultrasonic structural health monitoring (SHM)/nondestructive evaluation (NDE). The imaging provides high-resolution location, shape and/or size images of a structure, and for discontinuities with more complicated profiles. Guided wave (GW) network wavefield imaging methods combine tomography and wavefield/wavenumber imaging algorithms. Metallic plate damage detection uses guided ultrasonic waves and non-contact laser vibrometry. Guided waves are generated by piezoelectric transducers (PZT). A non-contact scanning laser Doppler vibrometer (SLDV) measures the full velocity plate guided wave wavefields. Developed network wavefield imaging algorithms account for multiple-actuator excitations from different angles enclosing the discontinuity, with algorithms using intrinsic wave characteristics such as wavefield, wavenumber, or reconstructed wave energy. Determined locations, sizes and shapes of highlighted areas in wavefield, wavenumber and/or filter reconstructed energy-based images correlate with location, size and shape of damage in metallic plates.