Multimode-interference based optical fiber sensor for civil structures monitoring / Chew Sue Ping
The thesis describes the experimental investigations on the multimode interferencebased fiber sensors using single mode multimode single mode (SMS) and multimode single mode multimode (MSM) structures as a sensing device for structural health monitoring (SHM) applications. Both sensor structures wer...
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| Format: | Thesis |
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2020
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| Online Access: | http://studentsrepo.um.edu.my/12537/ http://studentsrepo.um.edu.my/12537/2/Chew_Su_Ping.pdf http://studentsrepo.um.edu.my/12537/1/Chew_Sue_Ping.pdf |
| _version_ | 1848774680103616512 |
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| author | Chew , Sue Ping |
| author_facet | Chew , Sue Ping |
| author_sort | Chew , Sue Ping |
| building | UM Research Repository |
| collection | Online Access |
| description | The thesis describes the experimental investigations on the multimode interferencebased fiber sensors using single mode multimode single mode (SMS) and multimode single mode multimode (MSM) structures as a sensing device for structural health monitoring (SHM) applications. Both sensor structures were fabricated, characterized and tested for detecting strain and vibration in civil infrastructures. The proposed SMS structure comprises of a short segment of multimode fiber (MMF), which were fusionspliced by two single mode fibers (SMFs) at both terminals. On the other hand, MSM was fabricated by splicing SMF with MMF at both ends. A new packaging technique for the SMS structure was successfully developed to use as water level gauge. The SMS structure was also used to measure the strain in a reinforced concrete beam. The results indicated that the SMS fiber sensor provides sensitivity of 3.7781 nm/(mm/mm) and linearity of 0.96606 in compressive strain measurements to a maximum of 0.116 mm/mm. It was also found that the packaged SMS has much better temperature stability up to 0.0904 nm/°C as compared to unpackaged SMS. On the other hand, the developed MSM based sensor was successfully used to demonstrate a vibration frequency measurement of the mechanical vibration. The structure was capable of detecting wide range of vibration frequency, ranging from 20 Hz up to 6 kHz with high accuracy.
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| first_indexed | 2025-11-14T14:02:09Z |
| format | Thesis |
| id | um-12537 |
| institution | University Malaya |
| institution_category | Local University |
| last_indexed | 2025-11-14T14:02:09Z |
| publishDate | 2020 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | um-125372023-01-15T22:53:26Z Multimode-interference based optical fiber sensor for civil structures monitoring / Chew Sue Ping Chew , Sue Ping TA Engineering (General). Civil engineering (General) The thesis describes the experimental investigations on the multimode interferencebased fiber sensors using single mode multimode single mode (SMS) and multimode single mode multimode (MSM) structures as a sensing device for structural health monitoring (SHM) applications. Both sensor structures were fabricated, characterized and tested for detecting strain and vibration in civil infrastructures. The proposed SMS structure comprises of a short segment of multimode fiber (MMF), which were fusionspliced by two single mode fibers (SMFs) at both terminals. On the other hand, MSM was fabricated by splicing SMF with MMF at both ends. A new packaging technique for the SMS structure was successfully developed to use as water level gauge. The SMS structure was also used to measure the strain in a reinforced concrete beam. The results indicated that the SMS fiber sensor provides sensitivity of 3.7781 nm/(mm/mm) and linearity of 0.96606 in compressive strain measurements to a maximum of 0.116 mm/mm. It was also found that the packaged SMS has much better temperature stability up to 0.0904 nm/°C as compared to unpackaged SMS. On the other hand, the developed MSM based sensor was successfully used to demonstrate a vibration frequency measurement of the mechanical vibration. The structure was capable of detecting wide range of vibration frequency, ranging from 20 Hz up to 6 kHz with high accuracy. 2020-07 Thesis NonPeerReviewed application/pdf http://studentsrepo.um.edu.my/12537/2/Chew_Su_Ping.pdf application/pdf http://studentsrepo.um.edu.my/12537/1/Chew_Sue_Ping.pdf Chew , Sue Ping (2020) Multimode-interference based optical fiber sensor for civil structures monitoring / Chew Sue Ping. PhD thesis, Universiti Malaya. http://studentsrepo.um.edu.my/12537/ |
| spellingShingle | TA Engineering (General). Civil engineering (General) Chew , Sue Ping Multimode-interference based optical fiber sensor for civil structures monitoring / Chew Sue Ping |
| title | Multimode-interference based optical fiber sensor for civil structures monitoring / Chew Sue Ping |
| title_full | Multimode-interference based optical fiber sensor for civil structures monitoring / Chew Sue Ping |
| title_fullStr | Multimode-interference based optical fiber sensor for civil structures monitoring / Chew Sue Ping |
| title_full_unstemmed | Multimode-interference based optical fiber sensor for civil structures monitoring / Chew Sue Ping |
| title_short | Multimode-interference based optical fiber sensor for civil structures monitoring / Chew Sue Ping |
| title_sort | multimode-interference based optical fiber sensor for civil structures monitoring / chew sue ping |
| topic | TA Engineering (General). Civil engineering (General) |
| url | http://studentsrepo.um.edu.my/12537/ http://studentsrepo.um.edu.my/12537/2/Chew_Su_Ping.pdf http://studentsrepo.um.edu.my/12537/1/Chew_Sue_Ping.pdf |