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Research on Optical Fiber Sensor Based on Underwater Deformation Measurement
Jiawang Chen1, Chen Cao2, Yue Huang3
1Ocean College, Zhejiang University, Zhoushan 316021, China. arwang@zju.edu.cn.
Sensors (Basel, Switzerland)
|March 8, 2019
Summary
This study investigates intensity fiber curvature sensors for underwater engineering safety. The research establishes a mathematical model, verifies the sensing mechanism, and optimizes the sensor, improving its linear measurement range.
Area of Science:
- Optical Engineering
- Sensor Technology
- Underwater Structural Health Monitoring
Background:
- Underwater engineering projects face increasing safety risks due to complex deformations.
- Intensity fiber curvature sensors show potential for ground-based monitoring, but their underwater sensing mechanisms require further investigation.
Purpose of the Study:
- To elucidate the sensing mechanism of intensity fiber curvature sensors for underwater applications.
- To develop and validate a mathematical model for optical power loss and bending radius.
- To optimize the sensor for improved performance in underwater deformation monitoring.
Main Methods:
- Establishing a mathematical model relating optical power loss to bending radius during fiber deformation.
- Utilizing an optical power meter to measure light intensity loss in the fiber's sensitive region.
- Optimizing the sensor's signal conditioning circuit and applying it to single-point deformation curvature measurements.
Main Results:
- The developed mathematical model was experimentally verified, confirming the sensing mechanism of the intensity fiber curvature sensor.
- Optimization of the sensor and its signal conditioning circuit led to enhanced performance.
- The sensor demonstrated an improved linear measurement range compared to existing technologies.
Conclusions:
- The study successfully revealed the sensing mechanism of intensity fiber curvature sensors.
- The optimized sensor is suitable for accurate single-point deformation curvature measurements in underwater environments.
- The improved linear measurement range offers advantages over current similar sensor products for underwater engineering applications.
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