Publication: Towards parallel, 192 channel, 40MS/s/ch data acquisition for optical tomography: A system for aero-engine exhaust emission diagnostics
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Issued Date
2017
Resource Type
File Type
application/pdf
ISSN
19300395
Other identifier(s)
2-s2.0-85044288782
Rights Holder(s)
Scopus
Bibliographic Citation
Proceedings of IEEE Sensors. Vol 2017-December, (2017), p.1-3
Suggested Citation
Fisher E., Tsekenis S.-A., Yang Y., Ouypornkochagorn T., Chighine A., Polydorides N., Wright P., Mccann H. Towards parallel, 192 channel, 40MS/s/ch data acquisition for optical tomography: A system for aero-engine exhaust emission diagnostics. Proceedings of IEEE Sensors. Vol 2017-December, (2017), p.1-3. doi:10.1109/ICSENS.2017.8234310 Retrieved from: https://hdl.handle.net/20.500.14740/3971
Abstract
To investigate novel engine and fuel designs for greener aviation, instrumentation is required that can spatially and temporally resolve gas concentrations within aero-engine exhausts. This paper presents work towards a parallel, high-speed, distributed data acquisition (DAQ) system that employs in-situ demodulation of tunable diode laser absorption spectroscopy (TDLAS) signals. We briefly describe how this sits within a wider tomographic instrument, the electrical system of this scalable design and preliminary characterization. Being remote from the end-user (approx. 60m) and deployed within an industrial environment, we have used a hierarchical, embedded strategy. This uses photodiode pre-amplification, filtering, digitization, signal demodulation, Ethernet packaging and microprocessor control implemented both on a multi-node, distributed basis and with the DAQ physically mounted on the same mechanical 'ring' as the tomographic imaging array. Results show agreement with design but indicate that the first-generation interrupt-based direct-memory-access (DMA) between FPGA fabric memory and microprocessor memories is the predominant bottleneck. © 2017 IEEE.
Subject(s)
Absorption spectroscopy
Aircraft engines
Demodulation
Engines
Exhaust systems (engine)
Integrated circuit design
Optical tomography
Optical variables measurement
Parallel processing systems
Semiconductor lasers
Chemical species
Direct memory access
Distributed data acquisition
Industrial environments
Microprocessor control
Microprocessor memory
TDLAS
Tunable diode laser absorption spectroscopy
Data acquisition
Aircraft engines
Demodulation
Engines
Exhaust systems (engine)
Integrated circuit design
Optical tomography
Optical variables measurement
Parallel processing systems
Semiconductor lasers
Chemical species
Direct memory access
Distributed data acquisition
Industrial environments
Microprocessor control
Microprocessor memory
TDLAS
Tunable diode laser absorption spectroscopy
Data acquisition