Ultrasonic speckle correlation imaging of 2D particle velocity profiles in multiphase flows

Carlson, Johan E.; Ing, Ros Kiri

doi:10.1016/s0955-5986(03)00025-6

Cited by 7 publications

(3 citation statements)

References 10 publications

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“…9 The industrial applications of ultrasonic speckles are mainly on measurements of fluid velocity and the evaluation of surface roughness. [10][11][12] Elastography was also used to measure the internal stress of loaded metallic material. 13 However, the elastography is a contact measurement method, which means that there would be influence on boundary conditions.…”

Section: Introductionmentioning

confidence: 99%

Strain measurement by ultrasonic speckle technique based on adaptive genetic algorithm

Luo

Zhu

Chu

et al. 2013

The Journal of Strain Analysis for Engineering Design

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By comparing the unloaded and loaded ultrasonic speckle fields with cross-correlation, ultrasonic speckle technique can be applied to measure displacements and strains on the surface which is perpendicular to the propagation direction of ultrasound. Based on the adaptive genetic algorithm, the ultrasonic speckle measurement technique has higher efficiency and less measurement errors than the existing ultrasonic speckle correlation method. By adjusting genetic parameters through the adaptive mechanism, the adaptive genetic algorithm searches for the maximum value among the whole distribution of correlation coefficients efficiently. In this study on displacement measurements of an inner surface of an underwater object, the results obtained with different algorithms, including the adaptive genetic, coarse-fine interpolation and hill-climbing searching algorithms, were compared with each other. It was clear that the adaptive genetic algorithm outperformed other methods in computational time and accuracy. Considering above findings and the penetration of ultrasound, one can measure the strain of an inner surface of an underwater object using the ultrasonic speckle measurement technique based on adaptive genetic algorithm. This idea was proved by the good agreement of the measured strain with the corresponding simulation results from finite element analysis.

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Section: Introductionmentioning

confidence: 99%

Strain measurement by ultrasonic speckle technique based on adaptive genetic algorithm

Luo

Zhu

Chu

et al. 2013

The Journal of Strain Analysis for Engineering Design

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“…Another option to realize the velocity distribution measurement is ultrasound Doppler method, which differs from the ultrasound TOF technique that only gives a single value of mean velocity. There are several types of ultrasonic principle in velocity measurement such as speckle method (Carlson and Ing, 2003) and Doppler method (Takeda, 1986, Takeda, 1996.…”

Section: Introductionmentioning

confidence: 99%

Time-resolved flowmetering of gas-liquid two-phase pipe flow by ultrasound pulse Doppler method

Murai¹,

Tasaka²,

Takeda³

2012

AIP Conference Proceedings

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Ultrasound pulse Doppler method is applied for componential volumetric flow rate measurement in multiphase pipe flow consisted of gas and liquid phases. The flowmetering is realized with integration of measured velocity profile over the cross section of the pipe within liquid phase. Spatio-temporal position of interface is detected also with the same ultrasound pulse, which further gives cross sectional void fraction. A series of experimental demonstration was shown by applying this principle of measurement to air-water two-phase flow in a horizontal tube of 40 mm in diameter, of which void fraction ranges from 0 to 90% at superficial velocity from 0 to 15 m/s. The measurement accuracy is verified with a volumetric type flowmeter. We also analyze the accuracy of area integration of liquid velocity distribution for many different patterns of ultrasound measurement lines assigned on the cross section of the tube. The present method is also identified to be pulsation sensor of flow rate that fluctuates with complex gas-liquid interface behavior.

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“…Cross correlation techniques are also used for flow velocity and volume flow rates measurement with other measurement principles [14]. Among those, Carlson and Ing [15] used ultrasonic speckle correlation imaging for flow velocity measurement in a vertical pipe, and Takamoto et al [16] used ultrasonic correlation technique for measurements for very low volume flow rates.…”

Section: Introductionmentioning

confidence: 99%

Melt Volume Flow Measurement in the Mineral-Wool Production Process

Jin-peng

Hočevar

Širok

2011

SV-JME

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The quality of the end product in mineral wool production depends on the fiberisation process on the spinning machine. An important process variable is the fluctuation of melt volume flow from the melter. In this paper, a method for measuring melt volume flow, which is based on the measuring the diameter and flow velocity using machine vision, is presented. The velocity is measured by measuring the time of the travel of flow disturbances on two consecutive images using a correlation method. The flow disturbances are generated using a pneumatic system. The results of laboratory calibration using water as well as the results of field measurements in a mineral wool plant are presented. The field measurements were performed by comparison with the weight of the final product. The results of laboratory calibration show agreement with reference volume flow measurements with R 2 = 0.96 for water. The agreement among field measured values and available comparison method is also very good.

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Ultrasonic speckle correlation imaging of 2D particle velocity profiles in multiphase flows

Cited by 7 publications

References 10 publications

Strain measurement by ultrasonic speckle technique based on adaptive genetic algorithm

Strain measurement by ultrasonic speckle technique based on adaptive genetic algorithm

Time-resolved flowmetering of gas-liquid two-phase pipe flow by ultrasound pulse Doppler method

Melt Volume Flow Measurement in the Mineral-Wool Production Process

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