Measurement of the viscosity of liquids by near-field acoustics

Prugne, Ch; Est, J. Van; Cros, B.; Lévêque, G.; Attal, J.

doi:10.1088/0957-0233/9/11/015

Cited by 28 publications

(5 citation statements)

References 5 publications

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“…Figure 5a (left axis) shows the experimental sound velocity obtained (red points) as well as the reported values in 35 (green stars). The estimated sound velocity without PDMS is also included for 100% glycerol (purple circle), indicating that the PDMS layer does not affect the performance of the PMUT device.…”

Section: Resultsmentioning

confidence: 98%

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Single-cell system using monolithic PMUTs-on-CMOS to monitor fluid hydrodynamic properties

et al. 2022

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In this work, a single cell capable of monitoring fluid density, viscosity, sound velocity, and compressibility with a compact and small design is presented. The fluid measurement system is formed by a two-port AlScN piezoelectric micromachined ultrasonic transducer (PMUT) with an 80 μm length monolithically fabricated with a 130 nm complementary metal-oxide semiconductor (CMOS) process. The electrode configuration allows the entire system to be implemented in a single device, where one electrode is used as an input and the other as an output. Experimental verification was carried out by exploiting the features of piezoelectric devices such as resonators and acoustic transducers, where a frequency shift and amplitude variation are expected because of a change in density and viscosity. A sensitivity of 482 ± 14 Hz/kg/m3 demonstrates the potential of the system compared to other dual-electrode PMUTs. In addition, according to the acoustic measurement, the sound velocity, fluid compressibility, and viscosity coefficient can be extracted, which, to the best of our knowledge, is novel in these PMUT systems.

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Section: Resultsmentioning

confidence: 98%

“… a Left axis (red): Sound velocity versus density-viscosity corresponding to water–glycerol mixtures (red points) and data published in ref. 35 (green stars); the sound velocity without PDMS is included (purple circle). Right axis (blue): Compressibility estimation and data published in ref.…”

Section: Resultsmentioning

confidence: 99%

Single-cell system using monolithic PMUTs-on-CMOS to monitor fluid hydrodynamic properties

et al. 2022

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“…Vibration probes are much less intrusive than mechanically moving systems and could be adapted to commercial cheese vats. Such systems may vibrate in a tuning‐fork mode—they are sometimes known as acoustic probes 18 —or in torsional mode 19 (Fig. 1).…”

Section: Vibrational Systemsmentioning

confidence: 99%

Review of systems for monitoring curd setting during cheesemaking

O’Callaghan

O’Donnell

Payne

2002

Int J of Dairy Tech

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This paper reviews the current state of development of various techniques for monitoring coagulum formation in cheesemaking, and the implications of recent research findings. The techniques, which have become available for on-line use on modern cheese vats include hot wire probes, vibrating probes and several types of optical probe. Recent research has focused on comparing the various techniques against a background of cheese manufacture from milk with seasonal variation. The findings indicate that on-line techniques can improve the consistency of coagulum at cutting in a modern cheese factory.

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“…NAH theory was proposed by Williams and Maynard et al [4], whose basic idea is to calculate the sound field from the holographic data at multiple near-field points using some reconstruction algorithms [5]. Compared with farfield measurement, near-field measurement is easier to implement and therefore more widely used in measurement of different acoustic physical quantities [6,7], and additional evanescent wave information can be obtained and the reconstruction resolution can be further increased. Therefore, NAH is a more effective and feasible method to obtain the radiated sound field on large cylindrical surfaces.…”

Section: Introductionmentioning

confidence: 99%

A combined sound field reconstruction method for large cylindrical surfaces using non-conformal plane measurement

Cheng¹,

Han²,

Song³

et al. 2021

Meas. Sci. Technol.

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In practical acoustic measurement for large cylindrical surfaces, it is difficult to keep conformal and coaxial between the holographic surface and the reconstruction surface. To overcome this problem, a combined sound field reconstruction method using non-conformal plane measurement is proposed in this paper. Based on the sound pressure measured on the holographic plane, the combined method first reconstructs the sound field on the cylindrical conformal surface using statistically optimal planar near-field acoustic holography, and then reconstructs the sound field on the cylindrical reconstruction surface using statistically optimal cylindrical near-field acoustic holography. And a least square optimization method is proposed to determine the optimal position of the conformal surface. In addition, to overcome ill-posed problems, an error reduction method combining truncated singular value decomposition and Tikhonov regularization is proposed. Finally, the proposed method is applied to a test bed, and the accuracy and robustness of the sound field reconstruction for large cylindrical surfaces are obviously improved, which can provide reliable evidences for noise monitoring and control of mechanical systems.

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Measurement of the viscosity of liquids by near-field acoustics

Cited by 28 publications

References 5 publications

Single-cell system using monolithic PMUTs-on-CMOS to monitor fluid hydrodynamic properties

Single-cell system using monolithic PMUTs-on-CMOS to monitor fluid hydrodynamic properties

Review of systems for monitoring curd setting during cheesemaking

A combined sound field reconstruction method for large cylindrical surfaces using non-conformal plane measurement

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