Tunable Fiber Ring Laser Sensing for Simultaneous Vibration and Gas Detection
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Solution Overview
Problem
Conventional vibration sensors, particularly those based on piezoelectric materials, are incompatible with harsh environmental conditions and suffer from electromagnetic interference, while fiber optic sensors face challenges such as complex fabrication, low sensitivity, and the need for separate systems for vibration and gas monitoring, making them unsuitable for simultaneous multi-parameter sensing.
Innovation Solution
A tunable fiber ring laser sensor system that integrates a single fiber optic interrogator for simultaneous vibration and gas detection, utilizing a single-mode-multimode-single-mode fiber structure with a tunable wavelength output and gas sensing material coating, enabling simultaneous monitoring of vibration and gas presence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If piezoelectric materials are used for vibration sensing, then vibration detection capability is achieved, but electromagnetic interference and incompatibility with harsh environments occur
Solution Approach 1:
The patent replaces piezoelectric materials with fiber optic sensors that use optical fields instead of electrical fields for vibration sensing. The fiber optic sensor detects vibration through optical phase modulation caused by mechanical deformation of the fiber, eliminating electromagnetic interference while maintaining vibration detection capability in harsh environments
Solution Approach 2:
The fiber optic sensor system performs multiple functions simultaneously - it detects both vibration and gas presence using the same sensor platform and optical infrastructure, making the system universally applicable for multi-parameter monitoring in harsh environments without requiring separate electrical sensing systems
2Object-affected harmful factors
If fiber Bragg gratings or interferometers are used for vibration sensing, then fiber optic immunity to electromagnetic interference is achieved, but fabrication complexity and low sensitivity occur
Solution Approach 1:
The patent extracts the vibration sensing function from complex fabricated structures like Fiber Bragg Gratings and interferometers, implementing it instead through the inherent optical properties of simple fiber optic cables. The fiber itself acts as the sensor through optical phase modulation, eliminating the need for complex fabrication processes while maintaining electromagnetic immunity
Solution Approach 2:
The patent changes the sensing mechanism from wavelength-based detection (FBG) or intensity-based detection (interferometers) to optical phase modulation detection. This parameter change enables higher sensitivity while using simple fiber optic structures that are easier to fabricate and deploy, maintaining electromagnetic immunity without fabrication complexity
3Difficulty of detecting and measuring
If spectral shift detection is used for vibration sensing, then fiber optic sensor operation is achieved, but measurement response time increases
Solution Approach 1:
The patent replaces slow spectral shift detection with fast optical phase modulation detection. By using coherent light and phase-sensitive detection methods, the system achieves rapid response times suitable for dynamic vibration monitoring, eliminating the slow steady-state spectrum acquisition required by traditional spectral shift methods
4Difficulty of detecting and measuring
If separate vibration and gas sensor systems are used, then specialized sensing for each parameter is achieved, but system complexity and cost increase
Solution Approach 1:
The patent implements a universal fiber optic sensor platform that simultaneously detects both vibration and gas presence. The same optical fiber infrastructure and light source are used for both sensing functions, with vibration detected through phase modulation and gas detected through absorption spectroscopy, eliminating the need for separate sensor systems and reducing overall complexity and cost
Solution Approach 2:
The patent merges vibration sensing and gas sensing into a single integrated fiber optic sensor system. Both sensing functions share common components including the light source, optical fiber, and detection electronics, while using distinct physical mechanisms (phase modulation for vibration, absorption spectroscopy for gas) to achieve simultaneous multi-parameter monitoring
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
The system provides continuous, in-situ, and cost-effective simultaneous monitoring of vibration and gas parameters, enhancing measurement accuracy and enabling early detection of pipeline defects or leaks, suitable for harsh environments like gas compressor stations and supercritical CO2 power plants.
Implementation Method 1
a tunable fiber ring laser in electronic and optical communication with a vibration sensor and a gas detection sensor
Implementation Method 2
causing the vibration sensor to emit a modified signal that differs from the original signal from the tunable ring laser based on the amount of vibration that is incident upon the vibration sensor
Implementation Method 3
causing the gas detection sensor to emit a modified signal that differs from the original signal from the tunable ring laser based on the presence of a target gas
Data Source
AI summary
One or more embodiments relates to a system for simultaneously detecting vibration and the presence of a target gas having a tunable fiber ring laser in electronic and optical communication with a vibration sensor and a gas detection sensor. One or more embodiments relate to a method for simultaneously measuring vibration and detecting the presence of a target gas in an environment having the steps of providing a system for simultaneously measuring vibration and detecting a target gas into an environment; sending an optical signal to a vibration sensor and gas detection sensor; and collecting and analyzing modified signals from the vibration sensor and gas detection sensor.