Optical Fiber Monitoring System Vibration Mode Point Correspondence
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Solution Overview
Problem
Existing optical fiber sensing technologies face difficulties in accurately corresponding points on an optical fiber cable with points on a monitoring target, particularly for monitoring multiple locations on a target structure.
Innovation Solution
A monitoring system comprising an acquisition means to measure vibration amplitudes along the optical fiber cable, a generation means to create a vibration mode of the monitoring target, and a detection means to identify corresponding points on the target based on these amplitudes and modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If optical fiber sensing technology is used to monitor multiple points on a target structure, then monitoring coverage is improved, but the ability to accurately correspond points on the optical fiber cable with points on the monitoring target deteriorates
Solution Approach 1:
The patent uses vibration mode analysis to establish correspondence between optical fiber cable points and monitoring target points. By analyzing the vibration characteristics and modes of the target structure, the system can accurately map sensor locations on the optical fiber to specific locations on the monitored structure, even when the fiber is attached at multiple points or in irregular patterns.
Solution Approach 2:
The patent employs phase changes in optical signals to encode spatial and vibrational information. By detecting phase variations in the backscattered light, the system can distinguish between different locations on the optical fiber and correlate them with corresponding points on the monitoring target, enabling accurate multi-point monitoring.
2Loss of information
If optical fiber cable is attached to monitoring target for vibration measurement, then vibration information acquisition is improved, but the difficulty of detecting and measuring corresponding points deteriorates
Solution Approach 1:
The system uses feedback from vibration mode analysis to iteratively refine the correspondence between optical fiber points and target points. By continuously analyzing the vibration responses and adjusting the mapping relationships, the system overcomes the difficulty of accurately identifying corresponding points while maintaining comprehensive vibration information acquisition.
Solution Approach 2:
The patent introduces vibration mode analysis as an intermediary process that bridges the gap between optical fiber sensor data and physical target locations. This intermediary analysis layer processes the raw vibration signals and translates them into meaningful spatial correspondence information, making point identification feasible even with complex attachment configurations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate correspondence between points on the optical fiber cable and the monitoring target, allowing for precise vibration measurement at specific locations such as the edge or center of the target, even with uneven optical fiber cable layouts.
Implementation Method 1
a monitoring device transmit a pulse light in the optical fiber cable attached to a monitoring target such as bridge. The monitoring device acquire the environment information around the monitoring target by analyzing a backscattered light of the pulse light.
Data Source
AI summary
It is difficult to find corresponding between a point on an optical fiber and a point on a monitoring target, therefore, a monitoring system comprises an acquisition means for acquiring a plurality of amplitudes of vibrations for points on an optical fiber based on light propagating the optical fiber attached to a monitoring target, a generation means for generating a vibration mode of the monitoring target based on the plurality of amplitudes and a detection means for detecting a point on the monitoring target corresponding a point on the optical fiber based on the vibration mode.