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Sensors 2019, 19(8), 1780; https://doi.org/10.3390/s19081780

Frequency-Dependent Streaming Potential in a Porous Transducer-Based Angular Accelerometer

School of Automation, Beijing Institute of Technology, Beijing 100081, China
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Author to whom correspondence should be addressed.
Received: 21 March 2019 / Revised: 9 April 2019 / Accepted: 10 April 2019 / Published: 13 April 2019
(This article belongs to the Section Chemical Sensors)
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Abstract

This paper presents a transient model of streaming potential generated when fluid flows through a porous transducer, which is sintered by glass microspheres and embedded in the circular tube of a liquid circular angular accelerometer (LCAA). The streaming potential coupling coefficient (SPC) is used to characterize this proposed transient model by combining a capillary bundle model of a porous transducer with a modified Packard’s model. The modified Packard’s model is developed with the consideration of surface conductance. The frequency-dependent streaming potential is investigated to analyze the effect of structure parameters of porous media and the properties of the fluid, including particle size distribution, zeta potential, surface conductance, pH, and solution conductivity. The results show that the diameter of microspheres not only affects bandwidth and transient response, but also influences the low-frequency gain. In addition, the properties of the fluid can influence the low-frequency gain. Experiments are actualized to measure the steady-state value of permeability and SPC for seven types of porous transducers. Experimental results possess high consistency, which verify that the proposed model can be utilized to optimize the transient and steady-state performance of the system effectively. View Full-Text
Keywords: bandwidth; liquid circular angular accelerometer; low-frequency gain; porous transducer; streaming potential coupling coefficient; surface conductance; transient model; zeta potential bandwidth; liquid circular angular accelerometer; low-frequency gain; porous transducer; streaming potential coupling coefficient; surface conductance; transient model; zeta potential
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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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Ming, L.; Wang, M.; Ning, K. Frequency-Dependent Streaming Potential in a Porous Transducer-Based Angular Accelerometer. Sensors 2019, 19, 1780.

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