A continuous wave ultrasound analysis device for analysing a surface of a component includes an input to receive ultrasound data relating to continuous wave, swept frequency ultrasound propagated through the component; a processing section to derive a standing wave amplitude spectrum from the received ultrasound data, and determine a property of an unconstrained layer on the surface based on the standing wave amplitude spectrum; and an output to output the determined property of the layer. A method of continuous wave ultrasound for analysing a surface is also provided.

An imaging device includes a transducer that includes an array of piezoelectric elements formed on a substrate. Each piezoelectric element includes at least one membrane suspended from the substrate, at least one bottom electrode disposed on the membrane, at least one piezoelectric layer disposed on the bottom electrode, and at least one top electrode disposed on the at least one piezoelectric layer. Adjacent piezoelectric elements are configured to be isolated acoustically from each other. The device is utilized to measure flow or flow along with imaging anatomy.

Various methods and systems are provided for an ultrasound transducer structure for an ultrasound probe and methods of manufacturing thereof. In one example, the ultrasound transducer structure may include a lens, an acoustic stack disposed on the lens, and an acoustic backing material bonded to a side of the acoustic stack facing away from the lens without any intervening layer between the acoustic backing material and the acoustic stack, such that the acoustic backing material is in face-sharing contact with the side of the acoustic stack, wherein the acoustic backing material is composed of a solidified blend comprising a backing polymer.

The defect inspection device is provided with a sound wave excitation unit for exciting a sound wave having a time waveform represented by a continuous periodic function to a prescribed position on the surface of an object to be measured, a displacement amount measurement unit for measuring a periodically varying displacement amount generated by the propagation of the sound wave from the prescribed position through the surface at at least three different phases of the periodic variation, and a periodic function acquisition unit for determining a periodic function expressing the periodic variation of the physical quantity on the basis of the displacement amount at the at least three different phases.

An ultrasonic inspection device for inspection of a structure. The device includes a body with a first side and a second side that are on opposing sides of a gap. The gap is sized to receive the structure. A probe is attached to the first side and transmits ultrasonic signals at the structure. A reflector plate is attached to the second side and is fixed relative to the probe and reflects the signals that pass through the structure. The probe is configured to detect the signals that reflect off the structure and to detect the signals that pass through the structure and reflect off the reflector plate. The received signals provide for pulse echo and through transmission inspection of the structure.

A gas analyzer uses continuous sonic signals through a conduit to determine the composition of a gas in the conduit. A transmitting transducer drives sonic signals at a fixed frequency and a second transducer receives the sonic signals. The phase shift between two signals corresponds to the speed of sound through the gas and is related to the composition of the gas. The electronic versions of these signals are processed by lowering, or dividing, the fixed frequency which expands the range of phase shift measurement and allows the determination of an expanded range for the gas composition. In an ozone generation system, the gas analyzer is highly suitable for determining the composition of gases derived from air as a gas of known composition and a calibration point.

A transducer system. The system comprises a transducer and circuitry for applying an excitation waveform to excite the transducer during an excitation period. The circuitry for applying has: (i) circuitry for applying a first waveform at a first frequency; and (ii) circuitry for applying a second waveform at a second frequency differing from the first frequency.

A transducer system. The system comprises a transducer and circuitry for applying an excitation waveform to excite the transducer during an excitation period. The circuitry for applying has: (i) circuitry for applying a first waveform at a first frequency; and (ii) circuitry for applying a second waveform at a second frequency differing from the first frequency.

The defect inspection device is provided with a sound wave excitation unit for exciting a sound wave having a time waveform represented by a continuous periodic function to a prescribed position on the surface of an object to be measured, a displacement amount measurement unit for measuring a periodically varying displacement amount generated by the propagation of the sound wave from the prescribed position through the surface at at least three different phases of the periodic variation, and a periodic function acquisition unit for determining a periodic function expressing the periodic variation of the physical quantity on the basis of the displacement amount at the at least three different phases.

An imaging device includes a transducer that includes an array of piezoelectric elements formed on a substrate. Each piezoelectric element includes at least one membrane suspended from the substrate, at least one bottom electrode disposed on the membrane, at least one piezoelectric layer disposed on the bottom electrode, and at least one top electrode disposed on the at least one piezoelectric layer. Adjacent piezoelectric elements are configured to be isolated acoustically from each other. The device is utilized to measure flow or flow along with imaging anatomy.