Liquid viscosity measurement using super-harmonic resonance

Wei-Chih Wang; Chao-Shih Liu

doi:10.1117/12.2010008

17 April 2013 Liquid viscosity measurement using super-harmonic resonance

Wei-Chih Wang, Chao-Shih Liu

Proceedings Volume 8695, Health Monitoring of Structural and Biological Systems 2013; 869520 (2013) https://doi.org/10.1117/12.2010008
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2013, San Diego, California, United States

Abstract

Viscosity sensors based on mechanical resonance, such as piezoelectric resonators, semiconductor resonators, vibrating wire resonators and our previously developed optical-fiber based resonator [1] have gained popularity due to their simplicity of design and operation. They detect viscosity by submerging an oscillating probe in the fluid of interest. Viscosity is measured by using the fact that the vibration amplitude of the probe is inversely proportional to the viscosity of the fluid. In practice, the vibration amplitudes are always kept sufficiently small in order to avoid nonlinear vibration effects. In this paper, however, nonlinear vibration is intentionally excited to improve the sensitivity of viscosity measurements, in particular super harmonic resonance case. The results show that a nonlinear effect drastically improves sensitivity to viscous damping. Experimental results and several applications are also presented.

Citation Download Citation

Wei-Chih Wang and Chao-Shih Liu "Liquid viscosity measurement using super-harmonic resonance", Proc. SPIE 8695, Health Monitoring of Structural and Biological Systems 2013, 869520 (17 April 2013); https://doi.org/10.1117/12.2010008

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