Research on Displacement Monitoring of Key Points in Caverns Based on Distributed Fiber Optic Sensing Technology
The accurate and real-time monitoring of key-point displacements in cavern structures is crucial for assessing structural safety and stability. However, traditional monitoring methods often fail to meet the high-precision requirements in complex environments. This study explored the potential applic...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-04-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/25/8/2619 |
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| author | Jiangdong Wang Ziming Xiong Sheng Li Hao Lu Minqian Sun Zhizhong Li Hao Chen |
| author_facet | Jiangdong Wang Ziming Xiong Sheng Li Hao Lu Minqian Sun Zhizhong Li Hao Chen |
| author_sort | Jiangdong Wang |
| collection | DOAJ |
| description | The accurate and real-time monitoring of key-point displacements in cavern structures is crucial for assessing structural safety and stability. However, traditional monitoring methods often fail to meet the high-precision requirements in complex environments. This study explored the potential application of fiber optic sensors in monitoring key-point displacements by leveraging their sensitivity to optical parameters and spectral changes. Through theoretical analysis, a linear relationship model between key-point displacements and circumferential strain was derived and validated via uniaxial compression tests. Further numerical simulations revealed that different material properties and structural characteristics significantly affect the slope and intercept of the fitting curve, establishing a correlation between these factors and the model parameters. The results demonstrated that fiber optic sensors could accurately measure circumferential strain within the elastic range and reliably reflect key-point displacement trends through the linear relationship model. This paper provides a new theoretical basis for the application of fiber optic sensors in structural health monitoring and expands their potential in civil and geotechnical engineering fields, offering scientific support for engineering design optimization and disaster prevention. |
| format | Article |
| id | doaj-art-dd1e482d962044b396e070f329cddc35 |
| institution | DOAJ |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj-art-dd1e482d962044b396e070f329cddc352025-08-20T03:13:51ZengMDPI AGSensors1424-82202025-04-01258261910.3390/s25082619Research on Displacement Monitoring of Key Points in Caverns Based on Distributed Fiber Optic Sensing TechnologyJiangdong Wang0Ziming Xiong1Sheng Li2Hao Lu3Minqian Sun4Zhizhong Li5Hao Chen6State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, Nanjing 210007, ChinaState Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, Nanjing 210007, ChinaState Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, Nanjing 210007, ChinaState Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, Nanjing 210007, ChinaState Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, Nanjing 210007, ChinaState Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, Nanjing 210007, ChinaState Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, Nanjing 210007, ChinaThe accurate and real-time monitoring of key-point displacements in cavern structures is crucial for assessing structural safety and stability. However, traditional monitoring methods often fail to meet the high-precision requirements in complex environments. This study explored the potential application of fiber optic sensors in monitoring key-point displacements by leveraging their sensitivity to optical parameters and spectral changes. Through theoretical analysis, a linear relationship model between key-point displacements and circumferential strain was derived and validated via uniaxial compression tests. Further numerical simulations revealed that different material properties and structural characteristics significantly affect the slope and intercept of the fitting curve, establishing a correlation between these factors and the model parameters. The results demonstrated that fiber optic sensors could accurately measure circumferential strain within the elastic range and reliably reflect key-point displacement trends through the linear relationship model. This paper provides a new theoretical basis for the application of fiber optic sensors in structural health monitoring and expands their potential in civil and geotechnical engineering fields, offering scientific support for engineering design optimization and disaster prevention.https://www.mdpi.com/1424-8220/25/8/2619fiber optic sensorsdisplacement monitoringnumerical simulationfitting relationship |
| spellingShingle | Jiangdong Wang Ziming Xiong Sheng Li Hao Lu Minqian Sun Zhizhong Li Hao Chen Research on Displacement Monitoring of Key Points in Caverns Based on Distributed Fiber Optic Sensing Technology Sensors fiber optic sensors displacement monitoring numerical simulation fitting relationship |
| title | Research on Displacement Monitoring of Key Points in Caverns Based on Distributed Fiber Optic Sensing Technology |
| title_full | Research on Displacement Monitoring of Key Points in Caverns Based on Distributed Fiber Optic Sensing Technology |
| title_fullStr | Research on Displacement Monitoring of Key Points in Caverns Based on Distributed Fiber Optic Sensing Technology |
| title_full_unstemmed | Research on Displacement Monitoring of Key Points in Caverns Based on Distributed Fiber Optic Sensing Technology |
| title_short | Research on Displacement Monitoring of Key Points in Caverns Based on Distributed Fiber Optic Sensing Technology |
| title_sort | research on displacement monitoring of key points in caverns based on distributed fiber optic sensing technology |
| topic | fiber optic sensors displacement monitoring numerical simulation fitting relationship |
| url | https://www.mdpi.com/1424-8220/25/8/2619 |
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