Development of an optical flow through detector for bubbles, crystals and particles in oils

Birkin, Peter R.; Youngs, Jack J.; Truscott, Tadd; Martini, Silvana

doi:10.1039/d1cp03655f

Cited by 2 publications

(2 citation statements)

References 34 publications

(37 reference statements)

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“…To characterise this population and see how this changed over time and with the type of cavitation environment present, an optical transmission sensor was deployed (see ref. 19 for further details). Here, the response of a simple photodiode was monitored as a function of time and used to estimate the size and number of the bubbles present in the media as the oil is drawn through a capillary.…”

Section: Resultsmentioning

confidence: 99%

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Probing the mechanisms of enhanced crystallisation of APS in the presence of ultrasound

Birkin

Youngs

Truscott

et al. 2022

Phys. Chem. Chem. Phys.

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Section: Resultsmentioning

confidence: 99%

“…The construction and calibration of the optical transmission sensor (OTS) has been described previously. 19 In brief this sensor was fabricated using a glass capillary (1.6 mm internal diameter). A photodiode and LED were used as the detector and emitter respectively.…”

Section: Optical Sensor Construction Calibration and Operationmentioning

confidence: 99%

Probing the mechanisms of enhanced crystallisation of APS in the presence of ultrasound

Birkin

Youngs

Truscott

et al. 2022

Phys. Chem. Chem. Phys.

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Analysis of the Effect of Velocity on the Eddy Current Effect of Metal Particles of Different Materials in Inductive Bridges

Zhang

et al. 2022

Sensors

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A method for analyzing the influence of velocity changes on metal signals of different materials in oil detection technology is proposed. The flow rate of metal contaminants in the oil will have a certain impact on the sensitivity of the output particle signal in terms of electromagnetic fields and circuits. The detection velocity is not only related to the sensitivity of the output particle signal, but also to the adaptability of high-speed and high-throughput in oil online monitoring. In this paper, based on a high-sensitivity inductive bridge, the eddy current effect of velocity in a time-harmonic magnetic field is theoretically analyzed and experimentally verified, the phenomenon of particle signal variation with velocity for different materials is analyzed and discussed, and finally the effect of velocity on the output signal of the processing circuit is also elaborated and experimentally verified. Experiments show that under the influence of the time-harmonic magnetic field, the increase of the velocity enhances the detection sensitivity of non-ferromagnetic metal particles and weakens the detection sensitivity of non-ferromagnetic particles. Under the influence of the processing circuit, different velocities will produce different signal gains, which will affect the stability of the signal at different velocities.

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Development of an optical flow through detector for bubbles, crystals and particles in oils

Abstract: Oscillating microbubbles, driven by the local sound field, and crystals are detected and sized in oils as they pass through an optical detector.

Cited by 2 publications

References 34 publications

Probing the mechanisms of enhanced crystallisation of APS in the presence of ultrasound

Probing the mechanisms of enhanced crystallisation of APS in the presence of ultrasound

Analysis of the Effect of Velocity on the Eddy Current Effect of Metal Particles of Different Materials in Inductive Bridges

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