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10 results

A pilot study: Evaluation of sensor system design for optical fibre humidity sensors subjected to aggressive air sewer environment

Conference Proceeding
Alwis, L. S. M., Bustamante, H., Bremer, K., Roth, B., Sun, T., & Grattan, K. T. V. (2017)
A pilot study: Evaluation of sensor system design for optical fibre humidity sensors subjected to aggressive air sewer environment. In 2016 IEEE SENSORS,https://doi.org/10.1109/icsens.2016.7808482
Research has identified that humidity plays a fundamental role on the conversion of hydrogen sulphide into sulphuric acid during corrosion of concrete in gravity sewers and th...

Innovation in corrosion monitoring in sewers - use of novel photonic sensors for humidity measurements in gravity sewers

Journal Article
Bustamante, H., Alwis, L. S. M., Grattan, K. T. V., Sun, T., Vorreiter, L., & González, J. (2017)
Innovation in corrosion monitoring in sewers - use of novel photonic sensors for humidity measurements in gravity sewers. Water e-journal, 2(4), 1-6. https://doi.org/10.21139/wej.2017.038
Humidity plays a key role in microbiologically induced corrosion of concrete gravity sewers. Minor reductions in humidity can reduce corrosion rates. No reliable long lived (>...

Structural Health Monitoring Using Textile Reinforcement Structures with Integrated Optical Fiber Sensors

Journal Article
Bremer, K., Weigand, F., Zheng, Y., Alwis, L. S., Helbig, R., & Roth, B. (2017)
Structural Health Monitoring Using Textile Reinforcement Structures with Integrated Optical Fiber Sensors. Sensors, 17(2), 345. https://doi.org/10.3390/s17020345
Optical fiber-based sensors " embedded " in functionalized carbon structures (FCSs) and textile net structures (TNSs) based on alkaline-resistant glass are introduced for the ...

Simultaneous Measurement of Temperature and Relative Humidity Using a Dual-Wavelength Erbium-Doped Fiber Ring Laser Sensor

Journal Article
Mądry, M., Alwis, L., Binetti, L., Pajewski, Ł., & Bereś-Pawlik, E. (2019)
Simultaneous Measurement of Temperature and Relative Humidity Using a Dual-Wavelength Erbium-Doped Fiber Ring Laser Sensor. IEEE Sensors Journal, 19(20), 9215-9220. https://doi.org/10.1109/JSEN.2019.2922041
A fiber ring laser sensor setup utilizing FBGs (Fiber Bragg Gratings) for simultaneous measurement of ambient temperature and relative humidity (RH) is presented. Two FBGs are...

Determination of the Aspect-ratio Distribution of Gold Nanorods in a Colloidal Solution using UV-visible absorption spectroscopy

Journal Article
Kumar, R., Binetti, L., Nguyen, H. T., Alwis, L. S. M., Agrawal, A., Sun, T., & Grattan, K. T. V. (2019)
Determination of the Aspect-ratio Distribution of Gold Nanorods in a Colloidal Solution using UV-visible absorption spectroscopy. Scientific Reports, 9, https://doi.org/10.1038/s41598-019-53621-4
Knowledge of the distribution of the aspect ratios (ARs) in a chemically-synthesized colloidal solution of Gold Nano Rods (GNRs) is an important measure in determining the qua...

Optical Fibre Refractive Index Sensor in a Hybrid Fibre Grating Configuration

Journal Article
Alwis, L., Sun, T., & T.V. Grattan, K. (2015)
Optical Fibre Refractive Index Sensor in a Hybrid Fibre Grating Configuration. Procedia Engineering, 120, 11-14. https://doi.org/10.1016/j.proeng.2015.08.555
A temperature compensated Refractive Index (RI) sensor incorporating a Long Period Grating (LPG) and a Fibre Bragg Grating (FBG) in a series configuration has been developed a...

Integrated fiber Bragg grating incorporated textile carbon reinforcement structures

Conference Proceeding
Alwis, L., Bremer, K., Zheng, Y., Weigand, F., Kuhne, M., Helbig, R., & Roth, B. (2017)
Integrated fiber Bragg grating incorporated textile carbon reinforcement structures. In 2017 IEEE Sensorshttps://doi.org/10.1109/ICSENS.2017.8234106
An optical fibre Bragg grating (FBG) based strain sensor network incorporated in a functionalized textile-based carbon structure (FTCS) that can be used for structural health ...

Graphene-Oxide and Hydrogel Coated FBG-Based pH Sensor for Biomedical Applications

Journal Article
Binetti, L., Stankiewicz, A., & Alwis, L. S. M. (2018)
Graphene-Oxide and Hydrogel Coated FBG-Based pH Sensor for Biomedical Applications. Proceedings, 2(13), 789. https://doi.org/10.3390/proceedings2130789
A hydrogel coated fibre grating-based pH sensor for biomedical applications has been realised, where Graphene Oxide (GO) had been used to enhance the bonding between the coati...

Optical Fiber Sensor Design for Ground Slope Movement Monitoring for Railway Safety Operations

Conference Proceeding
Hook, D., Laing, W., Kerrouche, A., Barreto Gonzalez, D., & Alwis, L. S. (2018)
Optical Fiber Sensor Design for Ground Slope Movement Monitoring for Railway Safety Operations. In 2018 IEEE Sensors Proceedings, 1-4. https://doi.org/10.1109/ICSENS.2018.8589835
Scour and slope instability are a major issue in keeping the railway structures safe and operational. Conventional measurement techniques do not allow real-time monitoring of ...

Durability of functionalized carbon structures with optical fiber sensors in a highly alkaline concrete environment.

Journal Article
Bremer, K., Alwis, L., Zheng, Y., Weigand, F., Kuhne, M., Helbig, R., & Roth, B. (2019)
Durability of functionalized carbon structures with optical fiber sensors in a highly alkaline concrete environment. Applied Sciences, 9(12), https://doi.org/10.3390/app9122476
The paper presents an investigation into the durability of functionalized carbon structures (FCS) in a highly alkaline concrete environment. First, the suitability of optical ...