Novel optical viscosity sensor based on laser-induced capillary wave

Ebisui, Akira; Taguchi, Yoshihiro; Nagasaka, Yuji

doi:10.1117/12.759637

Cited by 2 publications

(2 citation statements)

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“…Previous studies of optical viscosity sensors were conducted by using different optical sensing methods. Experimental data published elsewhere show that the optical viscosity sensing can be based on the use of photodiodes mechanism [1], small angle neutron scattering and dynamic light scattering methods [2], forward light scattering principle [3][4][5][6][7], the laser-induced capillary wave technique [8][9][10], the flow of oil films with gravity method [11,12], a single optical tweezer technique [13], the magneto-acoustic and magneto-optical sensing method [14], and the application of molecular rotors method [15]. The above viscosity sensors have been used to measure only low or medium viscous materials, such as distilled water, bio-fluids, sucrose, glycerol solutions and silicone oils.…”

Section: Introductionmentioning

confidence: 99%

Measurement of Viscosity Using a Long-Period Fiber-Grating-Based Viscometer

Wang

Tang

Chen

et al. 2013

AMR

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This work addresses the comprehensive viscosity measurements and assessment of fluidic materials in the range from 0.01 to 2000 Poises using a fiber optical viscometer with the long-period fiber grating (LPFG) technology. The fluidic materials used and evaluated in this study were AC-20 asphalt cement, four types of silicone oils, and sunflower seed oil. We simultaneously measured the LPFG-induced discharge time and the transmission spectra both in hot air and fluidic materials (other than the AC-20 asphalt) at six different temperatures, i.e., 30, 60, 80, 100, 135, and 170 Celsius. An electromechanical rotational viscometer was also used to measure the viscosities of fluidic materialsthe silicone oils and sunflower seed oil at the above six temperatures. Comparative analysis shows that the LPFG-induced discharge time agreed well with the viscosities obtained from the rotational viscometer. The LPFG-based viscometer was capable of measuring the viscosity (discharge time) in the range from 0.12 to 2000 Poises, which is much wider than the viscosity range of a traditional electromechanical rotational viscometer. This fiber-optic LPFG-based viscometer could be proposed and implemented in the field of road and airfield pavement technology such as the viscosity measurements of asphalt cements, emulsified asphalt binders, and other viscous materials. Hopefully, such a highly sensitive viscometer is suitable for use in various fields of applications, such as civil, food, chemical and biological, mechanical, petroleum, and aerospace engineering.

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Section: Introductionmentioning

confidence: 99%

Measurement of Viscosity Using a Long-Period Fiber-Grating-Based Viscometer

Wang

Tang

Chen

et al. 2013

AMR

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“…This novel micro optical viscosity sensor consists of two deep trenches holding photonic crystal fibers for excitation laser, and two shallow trenches holding the lensed-fibers for probing laser. The optical interference fringe excited by two pulsed laser beams heats the sample surface, and the temporal behavior of surface geometry is detected as a first-order diffracted beam, which contains the information of liquid properties (viscosity and surface tension) [ 9 - 11 ]. The flow of oil films under gravity and centrifugal force may be adapted to give accurate absolute measurements of viscosity for silicon oils [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

An Optical Fiber Viscometer Based on Long-Period Fiber Grating Technology and Capillary Tube Mechanism

Wang

Tang

2010

Sensors

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This work addresses the development and assessment of a fiber optical viscometer using a simple and low-cost long-period fiber grating (LPFG) level sensor and a capillary tube mechanism. Previous studies of optical viscosity sensors were conducted by using different optical sensing methods. The proposed optical viscometer consists of an LPFG sensor, a temperature-controlled chamber, and a cone-shaped reservoir where gravitational force could cause fluid to flow through the capillary tube. We focused on the use of LPFGs as level sensors and the wavelength shifts were not used to quantify the viscosity values of asphalt binders. When the LPFG sensor was immersed in the constant volume (100 mL) AC-20 asphalt binder, a wavelength shift was observed and acquired using LabVIEW software and GPIB controller. The time spent between empty and 100 mL was calculated to determine the discharge time. We simultaneously measured the LPFG-induced discharge time and the transmission spectra both in hot air and AC-20 asphalt binder at five different temperatures, 60, 80, 100, 135, and 170 Celsius. An electromechanical rotational viscometer was also used to measure the viscosities, 0.15–213.80 Pa·s, of the same asphalt binder at the above five temperatures. A non-linear regression analysis was performed to convert LPFG-induced discharge time into viscosities. Comparative analysis shows that the LPFG-induced discharge time agreed well with the viscosities obtained from the rotational viscometer.

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Novel optical viscosity sensor based on laser-induced capillary wave

Cited by 2 publications

References 0 publications

Measurement of Viscosity Using a Long-Period Fiber-Grating-Based Viscometer

Measurement of Viscosity Using a Long-Period Fiber-Grating-Based Viscometer

An Optical Fiber Viscometer Based on Long-Period Fiber Grating Technology and Capillary Tube Mechanism

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