GasTOPS Ltd.

Ottawa, Canada

GasTOPS Ltd.

Ottawa, Canada
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Andrews N.L.P.,Queen's University | Ferguson T.,Queen's University | Rangaswamy A.M.M.,Queen's University | Bernicky A.R.,Queen's University | And 6 more authors.
Analytical Chemistry | Year: 2017

We present a fluorescence excitation-emission-matrix spectrometer with superior data acquisition rates over previous instruments. Light from a white light emitting diode (LED) source is dispersed onto a digital micromirror array (DMA) and encoded using binary n-size Walsh functions ("barcodes"). The encoded excitation light is used to irradiate the liquid sample and its fluorescence is dispersed and detected using a conventional array spectrometer. After exposure to excitation light encoded in n different ways, the 2-dimensional excitation-emission-matrix (EEM) spectrum is obtained by inverse Hadamard transformation. Using this technique we examined the kinetics of the fluorescence of rhodamine B as a function of temperature and the acid-driven demetalation of chlorophyll-a into pheophytin-a. For these experiments, EEM spectra with 31 excitation channels and 2048 emission channels were recorded every 15 s. In total, data from over 3000 EEM spectra were included in this report. It is shown that the increase in data acquisition rate can be as high as [{n(n + 1)}/2]-fold over conventional EEM spectrometers. Spectral acquisition rates of more than two spectra per second were demonstrated. © 2017 American Chemical Society.

Omrani H.,Queen's University | Omrani H.,GasTOPS Ltd. | Dudelzak A.E.,Queen's University | Dudelzak A.E.,GasTOPS Ltd. | And 2 more authors.
Analytica Chimica Acta | Year: 2014

The fluorescence of antioxidant additives in lubricant oil was used as an indicator of oxidative stability of the oil. It was found that the decrease in fluorescence intensities of phenyl-α-napthylamine, its dimer, and another unidentified antioxidant coincide with the formation of decomposition products of the oil base stock. Simple kinetic models were developed that were capable of describing antioxidant reactions as a pseudo first-order processes. It is shown that fluorescence excitation emission matrix (EEM) spectroscopy coupled with an optical fiber probe can provide real-time assessment of the oxidative stability of the lubricant. Parallel factor (PARAFAC) analysis was used to correlate the component scores to the oil breakdown number. © 2013 Elsevier B.V.

Omrani H.,Queen's University | Munzke D.,University of Potsdam | Reich O.,University of Potsdam | Dudelzak A.,GasTOPS Ltd. | Loock H.-P.,Queen's University
Optics InfoBase Conference Papers | Year: 2013

Fluorescence excitation-emission matrix spectroscopy is used to characterize lubricant quality. We use parallel factor (PARAFAC) analysis to correlate spectral features to antioxidant concentration and lubricant age. © OSA 2013.

News Article | February 16, 2017

Gastops is pleased to announce that it has been selected by Eastern Shipbuilding Group to provide the Dynamic Response Analysis (DRA) for the U.S. Coast Guard's new Offshore Patrol Cutter (OPC). As part of Eastern Shipbuilding Group’s team, Gastops will use computer modelling to simulate the ship’s propulsion system integration to predict and analyze ship performance and optimize control strategies during the program’s detailed design phase. The DRA will be used to conduct comprehensive tests that exercise system performance in real world scenarios, thereby identifying issues early in the design cycle. “Gastops has a long history of supporting the United States Coast Guard,” said Gastops President and CEO Dave Muir. “We are excited to work with Eastern Shipbuilding to bring this critical capability to the Coast Guard.” The ship model will be developed by Gastops during the detailed design phase, validated after the ship’s sea trials, and can be further leveraged as a risk mitigation tool throughout the ship’s lifecycle. About the Program Eastern Shipbuilding Group was selected by the U.S. Coast Guard in September 2016 to finalize its design and construct the first series of Nine Offshore Patrol Cutters to replace the Medium Endurance Cutters currently in service. Construction is scheduled to begin in fiscal year 2018. Delivery of the lead OPC is planned for fiscal year 2021. About Gastops Ltd. Gastops ( is recognized worldwide for its innovative contributions to the maintenance, productivity, and safety of critical equipment used in aviation, energy, marine, rail, and mining industries. We provide advanced equipment health sensing and analysis products, including on-line oil debris sensors, torque measurement sensors, turbine blade health sensors, and at-line oil analysis systems. We also provide a range of specialized technical and engineering services to assist in the design, development and in-service support of equipment control, monitoring and maintenance systems, based on our core competencies of systems analysis, modeling and simulation, software engineering, condition monitoring and equipment repair and overhaul.

Omrani H.,Queen's University | Omrani H.,GasTOPS Ltd. | Dudelzak A.,Queen's University | Dudelzak A.,GasTOPS Ltd. | Loock H.-P.,Queen's University
Optics InfoBase Conference Papers | Year: 2012

We combined two fiber-optic techniques to permit real-time monitoring of machinery fluids. Excitation emission matrix spectroscopy and fiber-loop cavity ring-down bsorption spectroscopy were used to characterize jet fuel and aero-turbine lubrication oil. Two multivariate analysis techniques, i.e. Parallel Factor Analysis (PARAFAC) and Principal Component Analysis and Regression (PCA\PCR), were applied on the EEM data to assess the contamination and degradation level. © 2012 OSA.

Andrews N.L.P.,Queen's University | Fan J.Z.,Queen's University | Omrani H.,GasTOPS Ltd. | Dudelzak A.,Queen's University | And 2 more authors.
Tribology International | Year: 2016

Synthetic lubricant oils based on a polyol ester base stock and containing amine-based antioxidants are characterised by fluorescence excitation-emission-matrix (EEM) spectroscopy. The main spectral features are attributed to antioxidants and are quantified using Parallel Factor (PARAFAC) analysis. The resulting PARAFAC component scores are compared to the relative antioxidant concentrations that were independently obtained with linear sweep voltammetry (LSV). An excellent correlation between the total intensity of the fluorescence signatures and the integrated LSV signal indicates that fluorescence EEM has a potential in the real-time - online or at-line - measurements of antioxidant concentrations. A modified fibre probe is presented that allows such measurements in strongly absorbing samples. The fibre probe contains a bevelled window to reduce the effects of fluorescence reabsorption and other "inner filter" effects. © 2015 Elsevier Ltd. All rights reserved.

Omrani H.,Queen's University | Barnes J.A.,Queen's University | Dudelzak A.E.,Queen's University | Dudelzak A.E.,GasTOPS Ltd. | And 2 more authors.
Analyst | Year: 2012

Excitation emission matrix (EEM) and cavity ring-down (CRD) spectral signatures have been used to detect and quantitatively assess contamination of jet fuels with aero-turbine lubricating oil. The EEM spectrometer has been fiber-coupled to permit in situ measurements of jet turbine oil contamination of jet fuel. Parallel Factor (PARAFAC) analysis as well as Principal Component Analysis and Regression (PCA/PCR) were used to quantify oil contamination in a range from the limit of detection (10 ppm) to 1000 ppm. Fiber-loop cavity ring-down spectroscopy using a pulsed 355 nm laser was used to quantify the oil contamination in the range of 400 ppm to 100000 ppm. Both methods in combination therefore permit the detection of oil contamination with a linear dynamic range of about 10000. © 2012 The Royal Society of Chemistry.

Horning S.,Technical and Engineering Services | Gonis A.,GasTOPS Ltd.
Marine Technology | Year: 2015

Propulsion system dynamic analysis (PSDA) entails the use of a computer simulation model of the propulsion system to support the design and evaluation of machinery, ship and control algorithm performance. The PSDA simulation model supports the continual development of the ship by identifying issues during the design of the ship systems, by in-service support of the ship control system, and by supporting ship upgrade programs. During the ship design phase, the proposed propulsion control algorithms can be created in the PSDA model to enable designers to identify design issues early in the program. A PSDA can be run from an ordinary desktop computer, which reduces operating costs when compared to a software test facility or onboard the ship. It also allows for work to be done on the algorithms even when a facility or the ship itself is unavailable for testing purposes.

Suresh P.,GasTOPS Ltd.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2014

Alloy identification of oil-borne wear debris captured on chip detectors, filters and magnetic plugs allows the machinery maintainer to assess the health of the engine or gearbox and identify specific component damage. Today, such identification can be achieved in real time using portable, at-line laser-induced breakdown spectroscopy (LIBS) and Xray fluorescence (XRF) instruments. Both techniques can be utilized in various industries including aviation, marine, railways, heavy diesel and other industrial machinery with, however, some substantial differences in application and instrument performance. In this work, the performances of a LIBS and an XRF instrument are compared based on measurements of a wide range of typical aerospace alloys including steels, titanium, aluminum and nickel alloys. Measurement results were analyzed with a staged correlation technique specifically developed for the purposes of this study - identifying the particle alloy composition using a pre-recorded library of spectral signatures. The analysis is performed in two stages: first, the base element of the alloy is determined by correlation with the stored elemental spectra and then, the alloy is identified by matching the particlea's spectral signature using parametric correlation against the stored spectra of all alloys that have the same base element. The correlation analysis has achieved highly repeatable discrimination between alloys of similar composition. Portable LIBS demonstrates higher detection accuracy and better identification of alloys comprising lighter elements as compared to that of the portable XRF system, and reveals a significant reduction in the analysis time over XRF. © 2014 SPIE.

GasTOPS Ltd. | Date: 2014-01-15

An assembly for monitoring a liquid potentially containing contaminant particles flowing through a conduit that may include a swirl inducer for inducing swirl flow within the conduit to cause contaminant particles to migrate toward the periphery of the conduit. A removable plug defines a passage for coupling into the path of the peripheral fluid flow within the conduit. A device associated with the removable plug senses sensing or captures in situ the contaminant particles such that the captured contaminant particles can be accessed by removing the plug.

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