Measurement Science & Technology

Jon has a broad interest in the application of measurement technology in sport. He has experience of using a range of systems to measure force, motion, sound, vibration, strain etc. In particular, he is interested in optical or image based technologies and has experience in motion capture, digital image correlation, laser Doppler vibrometry and fibre optic sensing. A number of projects have either developed bespoke measurement systems or validated commercially available systems.

A method for calibrating a digital image correlation system

Digital image correlation (DIC) is a non-contact optical method where digital images of the surface of an object are captured and analysed to extract full field shape, deformation and/or motion measurements. A non-periodic contrasting stochastic pattern that adheres and deforms with the surface is generally applied to enable measurements to be made. A grid of…

Measurement of the shape and deformation of the foot when running

Knowledge of the three dimensional shape of the human foot is important in the design of shoes to facilitate correct fit. The measurement of human foot shape has to date, been almost exclusively performed when the foot is stationary. However, the foot is a complex structure, which changes shape during the movements and loadings associated…

Validation of launch monitors used in golf

Launch monitor technologies are widely used in golf, however, the measurement uncertainty of such devices is not well established. TrackMan and Foresight are two of the most commonly used systems. TrackMan uses Doppler radar technology whereas Foresight is a stereoscopic optical system. Both manufacturers state the accuracy of their systems in their technical specifications, however,…

Evaluation of thin, flexible force sensors

Thin, flexible force sensors have appeared as an alternative for many force measurement applications where traditional sensors are not appropriate. These sensors fit easily over curved surfaces, are extremely light weight and are available in a wide variety of formats. For measurement of grip force, sensing elements can be placed on a glove, directly onto…