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Multi-parameter optical hydrogen sensing with in-situ temperature compensation
Funding:
Deutsche Forschungs- Gemeinschaft (DFG)
Grant number: 448330062
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Multiparameter Low-Level Optical Hydrogen Sensing
Period: 2021-2024
Titel: Function-optimized fiber optic sensing for the detection of low hydrogen levels with structured, palladium coated pi-shifted fiber Bragg gratings
Abstract: Palladium (Pd) has a unique hydrogen selectivity and expands as hydrogen diffuses into the material, which is coated on optical fibers. Transducing strain to the optical fiber, while the Pd expands and simultaneously monitoring the strain with temperature-decoupled high-precision pi-shifted fiber Bragg gratings enables spark-free, mostly inherent, and EM-resistant hydrogen detection on ppm-scale.
Partners:
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Wuhan University of Technology
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InnoTurbinE – Joint project
Compressor of an engine (MTU Aero Engines AG)
Funding:
MTU Aero Engines AG
Federal Ministry for Economic Affairs and Energy
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InnoTurbinE – Joint project
Period: 2020-2024
Titel: Innovative turbomachinery for sustainable energy systems. Subproject: Fiber optic probes for high temperature measurements in gas duct
Abstract: Regenerated fiber Bragg gratings are used to measure a total temperature profile with a high spatial density in a turbine. The measuring point density shall be increased by reducing the RFBG length down to ≤1mm and the distance down to ≤2mm. Read more
Partners:
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MTU Aero Engines AG
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AG Turbo
(RWTH Aachen, TU Berlin, TU Dresden, Universität Duisburg-Essen, Leibniz Universität Hannover, TU München, Universität Stuttgart, Deutsches Zentrum für Luft- und Raumfahrt e.V., MAN Energy Solutions SE, MTU Aero Engines AG, Rolls Royce Deutschland Ltd & Co. KG, Siemens Energy Global GmbH & Co. KG)
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Pi-LMFBG
Funding:
Zentrum zur Forschungsförderung und wissenschaftlichen Nachwuchs (FORWIN),
Munich University of Applied Sciences
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Laserstructured Force Sensor (Pi-LMFBG)
Period: 2019-2020
Titel: Highly sensitive fiber optical force sensor based on a fs-laser structured fiber Bragg grating (FBG)
Abstract: The development and evaluation of sensor elements that were fabricated with two different laser material processing techniques. They combine the advantages of pi-shifted FBGs within the fiber core with a micro-structured cladding for an enhanced force sensitivity.
Partners:
Laser Center, Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences
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Completed Projects
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Temperature distribution monitoring in SOC-Stacks
Funding:
Forschungszentrum Jülich GmbH
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High temperature monitoring in solid oxide fuel cell
Period: 2022-2023
Titel: Measurement of Temperature Distribution in Solid Oxide Cell-Stacks
Abstract: Solid Oxide Cells (SOC) are electrochemical energy converters with an oxide-ceramic solid electrolyte that typically operate at high temperatures to achieve high efficiencies. The temperature distribution in a SOC stack has so far been difficult to measure due to the stack construction and the high temperatures (650-850 °C). Due to the merits of small size, high sensitivity, immunity to electromagnetic interference, the capacity to achieve quasi-distributed sensing, and the high-temperature resistance, regenerated fiber Bragg gratings (RFBGs) are chosen to measure the temperature distribution inside SOC. Just in one fiber, multipoint RFBG temperature sensors array were fabricated and inserted into SOC-Stacks for monitoring the temperature distribution during different working conditions of SOC.
Partners:
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IEK-9, Institute of Energy and Climate Research , Forschungszentrum Jülich GmbH
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FBG-Aluguss
Funding:
Deutsche Forschungs- Gemeinschaft (DFG)
Grant number: RO 4145/3-2
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Strain Measurement in Aluminum Alloys (FBG-Aluguss)
Period: 2018-2020 (Follow-up project)
Titel: In situ strain measurement during solidification and cooling of aluminum alloys using regenerated fiber Bragg gratings
Abstract: High temperature stable regenerated fiber Bragg gratings (RFBGs) are used to measure temperature and strain at different locations during the casting process of aluminum. After the casted parts cooled down, the already embedded RFBGs are used as integrated sensors to monitor loads during operation.
Partners:
Institute for Measurement Systems and Sensor Technology, Department of Electrical and Computer Engineering, Technical University Munich
Chair of Metal Forming and Casting, Department of Mechanical Engineering, Technical University Munich
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High-Temp-Net
Funding:
Bayerische Forschungs-stiftung (BFS)
Grant number: AZ-1146-14
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Fiber Optic High-Temperature Network (High Temp Net)
Period: 2015-2019
Titel: Fibre-optic high-temperature sensor network for improving the efficiency of gas turbines and reactors in the process industry
Abstract: Multiplexing of regenerated fiber Bragg gratings allows temperature measurements up to 800°C with high spatial resolution at minimum cross-sections. Here, this technology is used to measure temperature distributions in chemical reactors and in the exhaust duct of gas turbines,
read more in German.
Partners:
MAN Energy Solutions SE
Siemens AG, Corporate Technology
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Indentation
Funding:
Deutsche Forschungs- Gemeinschaft (DFG)
Grant number: RO 4145/4-1
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Arthrosis Diagnostics with FBG-Indentation (Indentation)
Period: 2016-2019
Titel: Innovative arthrosis diagnostics with fiber Bragg grating based indentation suitable for endoscopic examinations
Abstract: The development of a micro-indenter system, which contains an FBG-based force sensor is intended to help surgeons to localize osteoarthritic. The dimensions in this novel setup are significantly smaller than all previous indentation devices and feasible to be integrated in an arthroscope. The research aim is to validate the concept on in vitro healthy and degenerated cartilage samples.
Partners:
Laboratory of Experimental Surgery and Regenerative Medicine, Clinic for General, Trauma and Reconstructive Surgery, Ludwig Maximilian University Munich
Nanoanalitics and Biophysics Laboratory, Department of Applied Sciences and Mechatronics, Munich University of Applied Sciences
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FBG-Aluguss
Funding:
Deutsche Forschungs- Gemeinschaft (DFG)
Grant number: RO 4145/3-1
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Strain Measurement in Aluminum Alloys (FBG-Aluguss)
Period: 2015-2018
Titel: In situ strain measurement during solidification and cooling of aluminum alloys using regenerated fiber Bragg gratings
Abstract: High temperature stable regenerated fiber Bragg gratings (RFBGs) are used to measure temperature and strain at different locations during the casting process of aluminum. After the casted parts cooled down, the already embedded RFBGs are used as integrated sensors to monitor loads during operation.
Partners:
Institute for Measurement Systems and Sensor Technology,Technical University Munich
Chair of Metal Forming and Casting, Technical University Munich
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HiBi-Powerplant
Funding:
Bundesministerium für Bildung und Forschung (BMBF)
Grant number: 03FH055PX3
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Fiber Optical Sensor System for Generators (Powerplant)
Period: 2014-2018
Titel: Fiber optical HiBi-FBG sensor system for increasing the efficiency in the utilization of high power generators
Abstract: The development of a FBG-based sensor system that allow strain compensated temperature measurements within high power generators is the main goal of this project. The focus lies on the utilization of surface-attached polarization maintaining fibers for the compensation of transversal strains while measuring temperature and longitudinal strains on the FBG sensor element.
Partners:
Siemens AG, Corporate Technology
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High-Temp
Funding:
Bundesministerium für Bildung und Forschung (BMBF)
Grant number: 170 10X11
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High Temperature FBG for Process Control (High Temp)
Period: 2011-2015
Titel: High temperature resistant fiber optical temperature sensors in the process and condition monitoring
Abstract: Regenerated FBGs have been developed for high temperature measurements in the range of several hundred degrees.
Partners:
AOS GmbH
General Electric Global Research Europe
MTU Aero Engines GmbH
Xiton Photonics GmbH
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HiBi
Funding:
Bundesministerium für Bildung und Forschung (BMBF)
Grant number:
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Polarization Maintaining FBG Sensors (HiBi)
Period: 2010-2013
Titel: Fiber Bragg sensor technology with polarization maintaining fiber wave guides
Abstract: Birefringence effects have a negative influence on the sensor performance of FBG in single mode fibers, especially in presence of transversal loads. FBG in polarization maintaining fibers help to avoid these effects.
Partners:
General Electric Global Research Europe
Hottinger Baldwin Messtechnik GmbH
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APE
Funding:
Bundesministerium für Bildung und Forschung (BMBF)
Grant number:
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Application and Precision Enhancement of FBG-Sensors
Period: 2006-2009
Titel: : Application and precision enhancement of FBG sensor technology
Partners:
Kayser-Threde GmbH
AOS GmbH
European Aeronautic Defence and Space (EADS)
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