Rapid and Precise Measurement System for Ultrasonic Velocity by Pulse Correlation Method Designed for Chemical Analysis

Hosoda, Maiko; Takagi, Kenshiro; Ogawa, Hideo; Nomura, Hiroyasu; Sakai, Keiji

doi:10.1143/jjap.44.3268

Cited by 10 publications

(10 citation statements)

References 15 publications

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“…22) The electro-magnetically spinning (EMS) viscoelasticity measurement system developed in this study has the advantage that the rotational probe can be confined inside the closed reaction chambers of the aforementioned processes, because the driving torque is remotely conducted to the rotor from outside the chamber. [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] The driver applies a rotating magnetic field to the space around the rotor, which is made of electrically conductive materials. The interaction between the rotational magnetic field and induced Lorentz current generates torque, which rotates the probe such that it follows the rotation of the magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Application of EMS system for continuous measurement of rheology in reaction chamber

Hosoda¹,

Yamakawa²,

Sakai³

2023

Jpn. J. Appl. Phys.

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The electromagnetically spinning (EMS) method for viscosity measurement was enhanced for applications in a confined reaction chamber. In the reaction chamber, the immersion of the rotor into the sample might trigger the precipitation and aggregation of ingredients to the pivot of the probe rotor, which leads to harmful frictional torque of the rotation. To address this problem, an upper-point-type auto-standing probe rotor was developed and applied for the long-term measurement of the solution process of rock sugar in water. In addition, we propose the adoption of a punched board, instead of a solid board, as the lower substrate of the plate-plate-type rotational viscometer, which allows rapid exchange of the sample fluid between the interior and exterior of the narrow measurement area through molecular diffusion. We investigated the effect of punches from the perspective of the diffusion process of momentum and determined the geometrical conditions

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Section: Introductionmentioning

confidence: 99%

Application of EMS system for continuous measurement of rheology in reaction chamber

Hosoda¹,

Yamakawa²,

Sakai³

2023

Jpn. J. Appl. Phys.

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“…Therefore, various methods have been developed to improve the time of flight (TOF) estimation accuracy. At which some of them based on the proper design of the transmitting and/or receiving system (configuration approach) , on the generation of signals with good time localization (sensor approach) , or on the usage of sophisticated digital techniques (processing approach) . The first two strategies either offer simple and low cost resolutions with very poor results, or produce accurate estimations by requiring complicated and expensive hardware.…”

Section: Introductionmentioning

confidence: 99%

Robust spectral estimation for speed of sound with phase shift correction applied online in yeast fermentation processes

Hussein

Becker

2012

Engineering in Life Sciences

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Ultrasound techniques are well suited to provide real‐time characterization of bioprocesses in non‐invasive, non‐contact, and non‐destructive low‐power consumption measurements. In this paper, a spectral analysis method was proposed to estimate time of flight (TOF) between the propagated echoes, and its corresponding speed of sound (USV). Instantaneous power spectrum distribution was used for accurate detection of echo start times, and phase shift distribution for correcting the involved phase shifts. The method was validated by reference USV for pure water at 9–30.8°C, presenting a maximum error of 0.22%, which is less than that produced by the crosscorrelation method. Sensitivity analyses indicated a precision of 6.4 × 10−3% over 50 repeated experiments, and 0.11% over two different configurations. The method was competently implemented online in a yeast fermentation process, and the calculated USV was combined with temperature and nine signal features in an artificial neural network. The network was designed by back propagation algorithm to estimate the instantaneous density of the fermentation mixture, producing a maximum error of 0.95%.

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“…Many types of rheometry methods exist, 16) and we are extending various methodologies for the unique rotationaltype viscosity meter developed by us, [17][18][19][20][21][22][23][24][25][26][27][28][29] i.e. an electromagnetic spinning (EMS) viscometer that provides an accurate measurement of the low viscosities of aqueous salt solutions having a shear viscosity as low as that of pure water.…”

Section: Introductionmentioning

confidence: 99%

Extension of remote distance of electromagnetically spinning viscometer

Hosoda

Yamakawa²,

Sakai

2021

Jpn. J. Appl. Phys.

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An electromagnetically spinning (EMS) viscometer enables the remote sensing of rheological properties. To date, the distance of remote sensing of EMS system has been limited by the aperture size of rotating magnets, which drive the rotation of the metal viscosity probe through electromagnetic interactions. In this study, we develop a new device that can extend the remote distance. The extender is composed of a pair of freely rotating magnets set in a confined sample container, which rotates synchronously to the main driving magnets and applies torque to the probe above the extender. The remote distance is successfully extended up to 100 mm. We carried out the viscosity measurement for lowly viscous samples and examined that the EMS system equipped with a remote distance extender works as a viscometer with a measurement accuracy of 1%.

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Rapid and Precise Measurement System for Ultrasonic Velocity by Pulse Correlation Method Designed for Chemical Analysis

Cited by 10 publications

References 15 publications

Application of EMS system for continuous measurement of rheology in reaction chamber

Application of EMS system for continuous measurement of rheology in reaction chamber

Robust spectral estimation for speed of sound with phase shift correction applied online in yeast fermentation processes

Extension of remote distance of electromagnetically spinning viscometer

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