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Metallic resonant strain gauges with high overload capability

T. Yan (The Brunel Centre for Manufacturing Metrology, Brunel University, Uxbridge, Middlesex, UK)
B.E. Jones (The Brunel Centre for Manufacturing Metrology, Brunel University, Uxbridge, Middlesex, UK)
R.T. Rakowski (The Brunel Centre for Manufacturing Metrology, Brunel University, Uxbridge, Middlesex, UK)
M.J. Tudor (School of Electronics and Computer Science, University of Southampton, Southampton, Hampshire, UK)
S.P. Beeby (School of Electronics and Computer Science, University of Southampton, Southampton, Hampshire, UK)
N.M. White (School of Electronics and Computer Science, University of Southampton, Southampton, Hampshire, UK)

Sensor Review

ISSN: 0260-2288

Article publication date: 1 June 2005

454

Abstract

Purpose

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This paper reports on a novel load cell and a novel torque transducer having stiffness and potential overload capability some ten times that of existing load cells and torque transducers based on the resistance strain gauges.

Design/methodology/approach

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Describes the practical capabilities and technology – the design, construction and characterisation.

Findings

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Both the load cell and the torque transducer use recently developed metallic triple beam resonators with thick‐film lead zirconate titanate (PZT) drives and pickups. The advantages of this technology are frequency output, high overload capability, high sensitivity, high resolution, and low‐cost manufacture. Both the load cell and torque transducer output large changes in frequency (>500 Hz for relatively low changes in strain level i.e. <200 microstrain for the load cell and <400 microstrain for the torque transducer), providing high sensitivity and high overload capability.

Practical implications

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Load cells and torque transducers employing the new metallic resonators are expected to be far more robust than those using metallic resistance strain gauges.

Originality/value

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Focuses on an instrument with important features of use in many applications.

Keywords

Citation

Yan, T., Jones, B.E., Rakowski, R.T., Tudor, M.J., Beeby, S.P. and White, N.M. (2005), "Metallic resonant strain gauges with high overload capability", Sensor Review, Vol. 25 No. 2, pp. 144-147. https://doi.org/10.1108/02602280510585736

Publisher

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Emerald Group Publishing Limited

Copyright © 2005, Emerald Group Publishing Limited

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