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Cambridge Ultrasonics
Cambridge, UK
Consultancy service in physics, electronics, maths & ultrasonics

Cambridge Ultrasonics

Of particular interest

White Papers

White Papers are technical papers on various subjects relating to ultrasound. They are in pdf format. They are provided as seen. You may download a copy for your own interest but you may not reproduce or publish them in any way for profit.

Fundamentals of ultrasonicsWave type description and the relationship between wave speed, stiffness and density.
Inspection using ultrasonicsDifferent ultrasonic inspection methods. Lateral and axial resolution. Universal chirp generation and advantages of matched chirp detection.
Transducers in ultrasonicsCommon transducer types. Phased arrays. Time reversal detection.
Waves in ultrasonicsWave equation and wave speed. Reflection, transmission. Mode conversion. Near field and far field. Attenuation. Doppler effect. Dispersion. Important units.
Modelling of ultrsonic transducers and ultrasonic wave propagation for commercial applications using finite elements with experimental visualization for validationPaper presented in the conference Comsol Cambridge September 2014, at Churchill College, Cambridge University. The paper deals with some of the difficulties involved with modeling ultrasonic transducers and propagation of ultrasonic waves from the transducers. Problems ultrimately relate to spatial-meshing and time-meshing.
The Erosion of MetalsPhD thesis from 1980 on the subject of solid particle erosion of metallic surfaces. It includes: experimental evidence of target melting as a mechanism of erosion; experimental evidence of erosion at normal impingement with a steel sphere; mathematical theory of the statistical processes in erosion through teh concept of an impact zone; description of the construction of test equipment for performing ersion tests over a range of temperatures from 80 K to 1300 K; projectile speed measurement for signal particles and an erosive jet including corss-correlation methods.
When does a wave arrive?A whimsical and non-mathematical approach to understanding the complexities of wave propagation related to ultrasound. It draws a loose analogy between what happens to a wave-train or a packet of waves and the kind of train that human beings ride in. The transportation train has to be modified to fit with what a wave-train does and that makes for some weired travelling experiences.