Structure information for a substance within a volume may be obtained. The structure information may characterize structural non-linearity of the substance within the volume. A structure model for the substance within the volume may be generated based on the structure information and/or other information. The structure model may simulate one or more characteristics of the substance within the volume. Presentation of information on the characteristic(s) of the substance within the volume may be effectuated based on the structure model and/or other information.

A method of manipulating and/or investigating cellular bodies (9) is provided. The method comprises the steps of: providing a sample holder (3) comprising a holding space (5) for holding a fluid medium (11); providing a sample (7) comprising one or more cellular bodies (9) in a fluid medium (11) in the holding space (5); generating an acoustic wave in the holding space exerting a force (F) on the sample (7) in the holding space (5). The method further comprises providing the holding space (5) with a functionalised wall surface portion (17) to be contacted by the sample (7) and the sample (7) is in contact with the functionalised wall surface portion (17) during at least part of the step of application of the acoustic wave. A system and a sample holder (3) are also provided.

Systems and methods for monitoring the condition of ultrasonic transducers and ultrasonic probes used in non-destructive testing are provided. In one aspect, a degree of deterioration and end of life of an ultrasonic transducer can be estimated based upon measured environmental and/or operating parameters of the ultrasonic transducer. In another aspect, testing parameters acquired by a single ultrasonic probe or different ultrasonic probes can be measured and analyzed to identify deterioration of an ultrasonic probe.

A device includes a sensor including an emission unit which emits ultrasonic waves and a reception unit which receives the ultrasonic waves, the emission unit and the reception unit being arranged opposite each other across a conveyance path through which a recording material is conveyed, an instruction unit which supplies, to the emission unit, a first drive input or a second drive input larger than the first drive input, and a detection unit which detects information about a grammage of the recording material based on a first value obtained by the reception unit receiving ultrasonic waves emitted from the emission unit with the first drive input supplied thereto and coming not through the recording material and a second value obtained by the reception unit receiving ultrasonic waves emitted from the emission unit with the second drive input supplied thereto and coming through the recording material.

The disclosure relates to a method for determining and/or monitoring the state of a transformer oil, comprising the steps of a) performing an acoustic spectroscopy of the transformer oil, multiple ultrasonic emission signals of different frequencies and/or amplitudes being emitted into the transformer oil and corresponding reflected and/or transmitted ultrasonic reception signals of different frequencies and/or amplitudes being received after having passed through the transformer oil; and b) comparing the ultrasonic emission signals with the corresponding ultrasonic reception signals, an n-dimensional function characteristic of the transformer oil being ascertained; and c) matching the ascertained characteristic n-dimensional function from step b) with a reference function of corresponding dimension known for transformer oils, a reference transformer oil being determined; and d) registering a first value of at least one characteristic physical property of the transformer oil; and e) comparing the first value with a corresponding value of the reference transformer oil; and f) ascertaining the state of the transformer oil based on the comparison performed in step e). Furthermore, the disclosure relates to a device (100, 200) for determining and/or monitoring the state of a transformer oil.

A device for supplying an ultrasonic transducer including a power interface configured to provide an analog power signal, called supply signal, to the ultrasonic transducer, and further including a delta-sigma modulator configured to produce a delta-sigma modulator of a sinusoidal signal, called drive signal, and provide a digital signal, called control signal, to control said power interface. Also an ultrasonic device powered by such a supply device, an ultrasonic head including such ultrasonic devices and an ultrasonic system including such an ultrasonic head.

Methods, systems, and computer-readable storage media for accurate time delay estimation using coherent averaging. A plurality of out-of-bracket acoustical impulses are generated in a pipe segment of a fluid distribution system. Signal data representing the acoustical impulses sensed at two locations along the pipe segment are recorded. Precise timings for the generation of the acoustical impulses are obtained, and the acoustical impulses in the signal data recorded from the first location are averaged based on the precise timings to produce a near-sensor average impulse. Similarly, the acoustical impulses in the signal data recorded from the second location are averaged based on the same precise timings to produce a far-sensor average impulse. A time delay between arrival of the plurality of out-of-bracket acoustical impulses at the first and second locations is estimated from the timing of the near-sensor average impulse and the far-sensor average impulse.

An apparatus for ultrasonically inspecting a component of a gas turbine engine at a centre frequency required for ultrasonic inspection of the component. The apparatus comprises an ultrasonic transducer and a waveguide. The ultrasonic transducer and the waveguide are mounted in a holder, the holder is movably mounted in a carrier, and the carrier is movably mounted in a frame. The waveguide has a first end, a second end and a surface. The waveguide is circular in cross-section, the surface of the waveguide between the first end and the second end is concave, and the waveguide reduces in diameter from the first end to the second end. The length of the waveguide is equal to or greater than 0.5 times and equal to or less than 3 times the wavelength of an ultrasonic signal at the centre frequency required for the ultrasonic inspection.

A method of manipulating and/or investigating cellular bodies (9) is provided. The method comprises the steps of: providing a sample holder (3) comprising a holding space (5) for holding a fluid medium (11); providing a sample (7) comprising one or more cellular bodies (9) in a fluid medium (11) in the holding space (5); generating an acoustic wave in the holding space exerting a force (F) on the sample (7) in the holding space (5). The method further comprises providing the holding space (5) with a functionalised wall surface portion (17) to be contacted by the sample (7) and the sample (7) is in contact with the functionalised wall surface portion (17) during at least part of the step of application of the acoustic wave. A system and a sample holder (3) are also provided.

Methods, systems, and computer-readable storage media for accurate time delay estimation using coherent averaging. A plurality of out-of-bracket acoustical impulses are generated in a pipe segment of a fluid distribution system. Signal data representing the acoustical impulses sensed at two locations along the pipe segment are recorded. Precise timings for the generation of the acoustical impulses are obtained, and the acoustical impulses in the signal data recorded from the first location are averaged based on the precise timings to produce a near-sensor average impulse. Similarly, the acoustical impulses in the signal data recorded from the second location are averaged based on the same precise timings to produce a far-sensor average impulse. A time delay between arrival of the plurality of out-of-bracket acoustical impulses at the first and second locations is estimated from the timing of the near-sensor average impulse and the far-sensor average impulse.