OCDMA-based sensor network for monitoring construction sites affected by vibrations
Pour Rahimian, Farzad and Seyedzadeh, Saleh and Glesk, Ivan (2019) OCDMA-based sensor network for monitoring construction sites affected by vibrations. Journal of Information Technology in Construction, 24. pp. 299-317. ISSN 1874-4753
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Abstract
Due to the progressive demand for more accurate structural health monitoring of large-scale facilities, e.g. modern high-speed railways and bridges, there is a huge uptake in the development of optical sensor networks (OSN), which can help mitigate the issues with conventional electric sensors, especially their sensitivity to electromagnetic interferences and larger sizes. The existing fibre optic infrastructures are not widely used by OSNs, due to the lack of appropriate multiplexing techniques. Aiming at addressing the implementation issues of optical sensors in urban areas, this study proposes an efficient and cost-effective system for supporting the vibration sensing of unequally distributed points. The pro- posed system takes the advantages of spectral amplitude encoding optical code division multiple access (SAC-OCDMA) technique, in providing differentiated services in the physical layer with varying code weights. This system utilises more wavelengths (i.e. higher power) to the farthest sensing points in order to retrieved vibration signals, properly. The mechanism of SAC for OSN is elaborated using simulation results including the impact of transmission distance and the procedure of allocating codes to different zones. These results indicate the suitability of the proposed system to be implemented in existing fibre optic infrastructures. Moreover, the numerical analysis shows a high capacity of the sensor network deploying SAC. The proposed system addresses the implementation issues in optically sensing of structures distributed in urban areas.
ORCID iDs
Pour Rahimian, Farzad ORCID: https://orcid.org/0000-0001-7443-4723, Seyedzadeh, Saleh ORCID: https://orcid.org/0000-0001-6017-289X and Glesk, Ivan ORCID: https://orcid.org/0000-0002-3176-8069;-
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Item type: Article ID code: 68376 Dates: DateEvent13 June 2019Published5 June 2019Accepted4 November 2018SubmittedSubjects: Technology > Electrical engineering. Electronics Nuclear engineering Department: Faculty of Engineering > Architecture
Faculty of Engineering > Electronic and Electrical EngineeringDepositing user: Pure Administrator Date deposited: 13 Jun 2019 14:27 Last modified: 03 Oct 2024 00:27 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/68376