An online wear debris monitor

Whittington, H. W.; Flynn, Brian; Mills, G. H.

doi:10.1088/0957-0233/3/7/005

Cited by 16 publications

(6 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, CR and other chromatic parameters were applied to DTE24 #2 and DTE25 oils sampled a steel factory (POSCO, Korea); the results presented in Table 1. In the chromaticity algorithms equations (7), Hue H value gives an indication of the dominant optical wavelength, while saturation S value gives an indication of the spread of the spectrum:…”

Section: Resultsmentioning

confidence: 99%

“…Khandaker et al [6] used chromatic modulation technique to detect change in oil condition not by detecting intensity changes at particular wavelengths but by monitoring the sum of the contributions of relative changes at all wavelengths within a spectral power distribution. Electrical inductance techniques based on change in inductance of transducer coils due to the presence of metallic particles had been proposed by Whittington et al [7] and Flanagan et al [8]. Such devices are more sensitive to wear particles, compared to oil chemical degradation which usually precedes wear particle generation at tribointerfaces.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Novel Chromatic Technique Based on Optical Absorbance in Characterizing Mineral Hydraulic Oil Degradation

Ossia

Kong

2012

Advances in Tribology

View full text Add to dashboard Cite

A low cost, compact, real-time, and quick measurement optical device based on the absorbance of white light, which comprised of photodiodes in a 3-element color-sensor, feedback diodes, water and temperature sensing element, and so on, was developed and tested in low absorption mineral oil. The device, a deviation from conventional electrical, mechanical, and electrochemical techniques, uses color ratio (CR) and total contamination index (TCI) parameters based on transmitted light intensity in RGB wavelengths for oil condition monitoring. Test results showed that CR corroborated CIE chromaticity (- Coordinates) and increased with oil degradation unlike Saturation and Hue . CR was found to be independent of the particulate contaminants of oil, but dependent on chemical degradation. TCI depended on both chemical degradation and particulate contaminants in oil, being most sensitive in the blue wavelength range and least in the green. Furthermore, results agreed with those of viscometry, total acid number (TAN), and UV-VIS photospectrometry. CR and TCI gave clearer indication of oil degradation than key monitoring parameters like TAN and were found to be effective criteria for characterizing the degradation of hydraulic mineral oils.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel Chromatic Technique Based on Optical Absorbance in Characterizing Mineral Hydraulic Oil Degradation

Ossia

Kong

2012

Advances in Tribology

View full text Add to dashboard Cite

show abstract

“…In common, they aim to be built into a machine's lubrication path in order to detect continuously the occurrence of any wear particles. For instance, Whittington et al [18] have attempted to measure small changes through the on-line inductive debris monitor coil as any metallic particles pass in lubricating oil flow. However, most of the on-line products have the problem associated with generation of significant false nuisance signals.…”

Section: Wear Debris Analysismentioning

confidence: 99%

Incorporation of modern on-line spectral condition monitoring for operational availability improvement of reactor coolant pumps

Kang

Golay

2000

Proceedings of the Institution of Mechanical Engineers, Part E:

View full text Add to dashboard Cite

At the design stage, the work reported here recommends provision of the possibility of employing modern on-line spectral condition-monitoring equipment in order to improve the operational availability of nuclear power plant equipment, the reactor coolant pump (RCP).Following an analysis of the leading causes in the RCP forced outages, incorporation of the use of advanced on-line spectral condition-monitoring sensors and their corresponding data-processing equipment in new power plant designs is sought. They are employed in order to detect the incipient symptoms generated during the progression of potential system faults of major concern. Firstly, the applicability of recent developments in new sensors and data-processing techniques is examined. This examination concerns system status parameter monitoring in the analysis of vibration, motor current, partial discharge and wear debris. Finally, use of modern sensors and data-processing equipment, which are valuable for the intended condition-monitoring systems, is recommended. Furthermore, valuable information on the future trend of currently developing sensors at the research stage is briefly presented.This state-of-the-art review lays a foundation for developing modern comprehensive sensor networks to support efficient condition monitoring in other power plant rotating machines.

show abstract

“…In recent years, several of the online technology obtained a more accurate oil state timely. Considerable, increasing focus has been on online sensors for oil monitoring, includes of optical sensors [6], acoustic sensors [7], capacitance sensors [8], and inductive sensor [9]. Among them, the former three kinds of sensors are unable to distinguish the types and size of particles due to the external interference [10].…”

Section: Introductionmentioning

confidence: 99%