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Sensors 2017, 17(2), 416; doi:10.3390/s17020416

Dynamic Fluid in a Porous Transducer-Based Angular Accelerometer

1
School of Automation, Beijing Institute of Technology, Beijing 100081, China
2
School of Automation, Nanjing University of Science and Technology, Nanjing 210094, China
3
Beijing Automation Control Equipment Institute, Beijing 100074, China
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 5 December 2016 / Revised: 8 February 2017 / Accepted: 15 February 2017 / Published: 21 February 2017
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [20441 KB, uploaded 22 February 2017]   |  

Abstract

This paper presents a theoretical model of the dynamics of liquid flow in an angular accelerometer comprising a porous transducer in a circular tube of liquid. Wave speed and dynamic permeability of the transducer are considered to describe the relation between angular acceleration and the differential pressure on the transducer. The permeability and streaming potential coupling coefficient of the transducer are determined in the experiments, and special prototypes are utilized to validate the theoretical model in both the frequency and time domains. The model is applied to analyze the influence of structural parameters on the frequency response and the transient response of the fluidic system. It is shown that the radius of the circular tube and the wave speed affect the low frequency gain, as well as the bandwidth of the sensor. The hydrodynamic resistance of the transducer and the cross-section radius of the circular tube can be used to control the transient performance. The proposed model provides the basic techniques to achieve the optimization of the angular accelerometer together with the methodology to control the wave speed and the hydrodynamic resistance of the transducer. View Full-Text
Keywords: angular accelerometer; porous transducer; fluid transients; wave speed; dynamic permeability; streaming potential; sensor optimization angular accelerometer; porous transducer; fluid transients; wave speed; dynamic permeability; streaming potential; sensor optimization
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Cheng, S.; Fu, M.; Wang, M.; Ming, L.; Fu, H.; Wang, T. Dynamic Fluid in a Porous Transducer-Based Angular Accelerometer. Sensors 2017, 17, 416.

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