Search Results - "Petzing, J. N."

Visualising scattering underwater acoustic fields using laser Doppler vibrometry by Harland, A.R., Petzing, J.N., Tyrer, J.R.

“…Analysis of acoustic wavefronts are important for a number of engineering design, communication and health-related reasons, and it is very desirable to be able…”
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Application and assessment of laser Doppler velocimetry for underwater acoustic measurements by Harland, A.R., Petzing, J.N., Tyrer, J.R., Bickley, C.J., Robinson, S.P., Preston, R.C

“…The majority of traditional methods for making underwater acoustic pressure measurements involve placing all or part of a measurement transducer in the…”
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Development of speckle shearing interferometer error analysis as an aperture function of wavefront divergence by Wan Abdullah, W. S., Petzing, J. N.

“…Increasing the confidence in whole-field speckle-based optical metrology transducers requires a detailed understanding of the error sources of the respective…”
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Analysis of mutually incoherent symmetrical illumination for electronic speckle pattern shearing interferometry by Román, J. F., Moreno, V., Petzing, J. N., Tyrer, J. R.

“…A speckle shearing interferometer has been designed using symmetrical mutually incoherent illumination, in an effort to provide measurements of in-plane…”
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Quantification of biological variation in blood-based therapy - a summary of a meta-analysis to inform manufacturing in the clinic by Thurman-Newell, J. A., Petzing, J. N., Williams, D. J.

“…Background and Objectives Biological raw materials, the basis for cellular therapies such as stem cells, have a significantly greater degree of complexity than…”
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NON-INVASIVE MEASUREMENTS OF UNDERWATER PRESSURE FIELDS USING LASER DOPPLER VELOCIMETRY by HARLAND, A.R., PETZING, J.N., TYRER, J.R.

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Geometrically qualified ESPI vibration analysis of an engine by Farrant, D.I., Petzing, J.N., Tyrer, J.R.

“…This paper presents an application in the automotive industry where a combination of electronic speckle-pattern interferometry and laser doppler velocimetry…”
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Wavefront divergence: A source of error in quantified speckle shearing data by Abdullah, W. S. Wan, Petzing, J. N., Tyrer, J. R.

“…Divergent laser illumination is commonly used in current designs of commercial electronic speckle pattern shearing interferometry (ESPSI) or shearography, for…”
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Modal analysis of ultrasonic block horns by ESPI by Graham, G., Petzing, J.N., Lucas, M.

“…Slotted block horns are used in many high power ultrasonic tools, to achieve a uniform vibration amplitude across a wide output face. Finite element (FE)…”
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The effect of metallographic structure on clamped plate vibration characteristics by PETZING, J. N, TYRER, J. R

“…The vibration response of a square clamped plate is dependent on the metallographic structure of the material used. Analytical studies of such systems have…”
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In-plane pulsed carrier speckle interferometry for structural surface intensity measurement by Petzing, J. N., Tyrer, J. R.

“…Experimental validation of structural intensity analytical and Finite Element calculations has traditionally relied on accelerometer and strain gauge…”
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Analysis of loaded mandible behaviour using speckle pattern interferometry by Roman, J. F., Petzing, J. N., Tyrer, J. R.

“…Orthognatic surgeons have a requirement for the measurement of stress distribution within the human lower jaw, in order to aid and improve surgical procedures…”
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Pulsed carrier out-of-plane speckle interferometry for transient vibration analysis by Petzing, J. N., Davila, A., Kerr, D., Tyrer, J. R.

“…An out-of-plane pulsed electronic speckle pattern interferometer has been developed which incorporates novel Pockels-cell-based optics in the reference path…”
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Nonperturbing measurements of spatially distributed underwater acoustic fields using a scanning laser Doppler vibrometer by Harland, Andy R, Petzing, Jon N, Tyrer, John R

“…Localized changes in the density of water induced by the presence of an acoustic field cause perturbations in the localized refractive index. This relationship…”
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Design and Characterisation of Ultrasonic Cutting Tools by Lucas, M., Petzing, J.N., Cardoni, A., Smith, L.J., McGeough, J.A.

“…Cutting of food products and other materials with ultrasonically assisted tools has demonstrated significant benefits including reduced wastage and improved…”
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In-plane electronic speckle pattern shearing interferometry by Tyrer, J.R., Petzing, J.N.

“…An analysis of the out-of-plane shearing interferometer has been performed which shows that production of in-plane strain partial derivatives is possible,…”
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Extracting modal parameters of ultrasonic bar horns from ESPI FRF data by Graham, G., Petzing, J.N., Lucas, M.

“…This paper demonstrates the problems associated with determining the modal parameters of curved surface structures which exhibit high modal density and a…”
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Analysis of power ultrasonic components using shearing interferometry by Petzing, J.N., Tyrer, J.R.

“…The design and analysis of high power ultrasonic machining components have previously relied on empirical calculations and simple, ineffective experimentation…”
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IMPROVED INTERFEROMETRIC TECHNIQUES FOR MEASURING FLEXTENSIONAL TRANSDUCER VIBRATION PATTERNS UNDERWATER by Petzing, J.N., Tyrer, J.R., Oswin, J.R.

“…The design of flextensional transducers involves a two-stage process. Firstly finite element analysis (FE) is used to model the transducers in order to predict…”
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In-plane pulsed carrier speckle interferometry for structural surface intensity measurement by N. Petzing, J. R. Tyrer, J.

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