Portable Data Acquisition System for Offshore Applications

Ulvgård, Liselotte; Kamf, Tobias; Risberg, Alexander; Leijon, Mats

doi:10.1109/joe.2018.2840398

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…Developed compact flow control system utilises a unique hybrid architecture [7][8][9][10][11][12] implemented apparently for the first time for operating high power flowing medium COIL laser. A basic building block diagram of hybrid data acquisition and flow control system is shown in Fig.…”

Section: Flow Control Hybrid Das Architecture and Implementationmentioning

confidence: 99%

Real Time Flow Control System for Precise Gas Feed in COIL

2022

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This paper reports development of a real time flow control system for precise, controlled and uniform gas feed to a flowing medium Chemical Oxygen Iodine Laser (COIL). The optimal operation of this prominent laser depends upon the desired supply of gas constituents such as nitrogen (N2), chlorine (Cl2) and iodine (I2) to achieve adequately mixed laser gas. The laser also demands real time variation of flow rates during gas constituent transitions in order to maintain stabilized pressures in critical subsystems. Diluent nitrogen utilized for singlet oxygen transport is termed as primary buffer gas and that for iodine transport is termed as secondary buffer gas (with main and bypass components). Also, nitrogen in precise flows is used for mirror blowing, nozzle curtain, cavity bleed and diffuser startup. A compact hybrid data acquisition system (Hybrid DAS) for precise flow control using LabVIEW 2014 platform has been developed. The supported flow ranges may vary from few mmole.s-1 to few hundred mmole.s-1. The estimated relative uncertainty in the largest gas component i.e. primary buffer gas feed is nearly 0.7%. The implementation of in-operation variation using flow ramp enables swift stabilization of singlet oxygen generator pressures critical for successful COIL operation. The performance of Hybrid DAS is at par with fully wired DAS providing the crucial benefit of remote field operation at distances of nearly 80m in line of sight and 35m with obstacles

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Section: Flow Control Hybrid Das Architecture and Implementationmentioning

confidence: 99%

Real Time Flow Control System for Precise Gas Feed in COIL

2022

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“…This paper focuses primarily upon chemical generation of iodine by employing CuI-Cl 2 reaction mechanism and performs parametric investigation and analysis by using developed DAS based on wireless Wi-Fi interface [9][10][11][12][13][14] . DAS is configured in order to specifically meet the needs of online parametric measurement and operational requirements.…”

Section: Introductionmentioning

confidence: 99%

Data Acquisition System for Chemical Iodine Generation Suitable for Flowing Medium Chemical Oxygen Iodine Laser

et al. 2021

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Development of infrared flowing medium lasers needs to be envisaged in a manner that practical aspects such as system compactness, short readiness time, low system size, weight and power are met to make them field deployable. In this context, the critical aspect of in-situ production of lasing species (Iodine) in Chemical Oxygen Iodine Lasers (COIL), one of the most potent flowing medium lasers, has been investigated. The paper dwells on chemical generation of iodine and its precise flow and parameter control by implementing a customised Data Acquisition System (DAS). Iodine is generated in a chemical reaction of Cuprous Iodide (CuI) with chlorine. This is achieved by precisely controlled flow of chlorine diluted with a carrier gas (N2 ) in a ratio of 1:2. DAS includes regulated gas feed, accurate thermal stabilisation, relevant diagnostics and implementation of necessary safety interlocks in a real time operation scenario for establishing the system efficacy and scalability. The studies have demonstrated chemically generated iodine flow rate of ~ 1.2 mmol.s-1 for Cl2 flow rate of ~3 mmol.s-1 all measured in real time using the developed DAS with a conversion efficiency of 80%. Developed I2 supply system has potential to deliver iodine on demand with required flow rates, measurement uncertainty of ~ 4.5 percent and advantages of smaller specific weight and size with reduced system readiness time and electrical power supply using DAS system with adequate safety interlocks.

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“…Thus, with a set of advantages of wireless technologies, it is prudent to examine the possibility of utilising it for complex applications such as flowing medium lasers simultaneously finding ways to address the points of concern. In this context, hybrid data acquisition techniques utilise benefits of both wired and wireless technologies and have been implemented in various practical scenarios like smart grid applications 8 , power grid 9 , greenhouse management 10 , monitoring of cultural heritage physical parameters 11 , turbine power generation system 12 , automobile 13 , offshore 14 .…”

Section: Introductionmentioning

confidence: 99%

Hybrid Data Acquisition and Analysis System for Flowing Medium Lasers

Dohare¹,

Mainuddin²,

Singhal³

2020

Def. Sc. Jl.

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The medium gas lasers involves in-situ generation of the lasing medium, hence are associated with several complex processes including mixing of pumping and lasing species, energy exchange between the species, heat generation during reaction and its influence on the flow domain to list a few. Thus, the characterisation of lasing medium, condition of operation of individual critical subsystems and corresponding phenomenon thereof is essential in real time. It is here that a customised data acquisition and analysis system (DAAS) plays a key role. The paper dwells on the realisation of a customised hybrid DAAS with a master-slave architecture, which is portable and provides remote system operation. The noteworthy aspects of the developed DAAS include capability to handle close to 150 channels [64 analog input, 64 digital output, 5 analog output and 17 digital input] simultaneously with varied sampling rates requirement ranging from 100 samples/s to 200 k samples/s, modularity in design enabling scalability. Further, the efficacy of the developed DAAS has been tested by conducting several real time experiments with an existing chemical oxygen iodine laser source with a mass flow rate of 2.3 moles.s-1 both from close ranges and at line of sight remote distances of up to 80 m and nearly 35 m with obstacles.

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Portable Data Acquisition System for Offshore Applications

Cited by 3 publications

References 13 publications

Real Time Flow Control System for Precise Gas Feed in COIL

Real Time Flow Control System for Precise Gas Feed in COIL

Data Acquisition System for Chemical Iodine Generation Suitable for Flowing Medium Chemical Oxygen Iodine Laser

Hybrid Data Acquisition and Analysis System for Flowing Medium Lasers

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