Smith, P D, Young, R C D and Chatwin, C R (2010) A MEMS viscometer for unadulterated human blood. Measurement, 43 (1). pp. 144-151. ISSN 0263-2241

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Abstract

The design and theoretical modelling of an oscillating micro-mechanical-viscometer designed for the measurement of whole unadulterated human blood, is described. The proposed device utilises the dependence of the squeeze-film damping ratio on properties of the surrounding fluid to measure fluid viscosity using an oscillating plate structure. The optimum geometrical configuration for the device structure has been investigated and a methodology for defining the optimum configuration of the micro-mechanical sensor identified. This is then applied to calculate the predicted noise equivalent viscosity change . It was found that the device performance is limited by electronic noise within the detection circuitry rather than thermal mechanical noise. An electronic noise limited measurement resolution of , is predicted for measurement over a shear range of , at a measurement bandwidth of . The linearity of response of the micro-mechanical-viscometer is considered and the device is predicted to provide a linear measurement response.

Item Type:	Article
Keywords:	MEMS, Viscosity, Squeeze-film damping, Rheology, Human blood
Schools and Departments:	School of Engineering and Informatics > Engineering and Design
Subjects:	Q Science R Medicine T Technology
Related URLs:	Organisation
Depositing User:	Chris Chatwin
Date Deposited:	13 Jul 2015 10:53
Last Modified:	20 May 2017 17:17
URI:	http://sro.sussex.ac.uk/id/eprint/55303

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