Fabry-Perot Gas Sensor for Kitchen Leak Detection
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Solution Overview
Problem
Existing gas monitoring devices in kitchens suffer from low sensitivity and precision, poor practicality, and high costs due to complex structures and environmental sensitivity, making them ineffective for accurately detecting gas leaks and preventing explosions.
Innovation Solution
A gas monitoring device with a tubular housing and a Fabry-Perot cavity structure, where a light transmission module and a gas detecting module adjust the distance between reflective end surfaces based on gas concentration, changing the phase difference between emitted light beams to accurately detect gas concentrations using a gas-sensitive film and reflective film within a hollow structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional gas sensors (contact combustion, evanescent field optical fiber, refractive index change optical fiber, dye indicating optical fiber, spectral absorption optical fiber) are used for gas detection, then gas leakage can be detected, but sensitivity and precision are low
Solution Approach 1:
The patent replaces conventional gas sensing mechanisms with a Fabry-Perot interferometer-based optical detection system. The gas detection is achieved by measuring phase changes in light waves as they pass through the gas, converting a chemical detection problem into an optical measurement problem. This substitution enables high-precision detection with sensitivity to parts per million concentration levels, resolving the contradiction between measurement precision and reliability.
Solution Approach 2:
The patent utilizes changes in the refractive index and density of gas as concentration parameters change. By monitoring these physical parameter variations through optical interference patterns, the system achieves high sensitivity and precision in gas detection, directly addressing the limitation of conventional sensors with low measurement precision.
2Reliability
If conventional gas sensors are used, then gas detection is possible, but components are easily stained, affected by surrounding environment, and have poor stability
Solution Approach 1:
The patent replaces physical/chemical sensing components that are susceptible to environmental factors with an optical interference-based detection system. The Fabry-Perot interferometer measures gas concentration through optical phase changes, which are not affected by staining, humidity, or chemical contamination. This substitution eliminates the stability issues and environmental sensitivity inherent in conventional gas sensors.
Solution Approach 2:
The patent introduces light as an intermediary medium for gas detection. Instead of direct contact between sensing components and gas (which causes staining and environmental interference), the system uses optical waves that pass through the gas to detect concentration changes. This intermediary approach protects the detection system from harmful environmental factors while maintaining high reliability.
3Reliability
If conventional gas sensors are used, then gas detection function is provided, but structure is complicated and cost is high
Solution Approach 1:
The patent merges the gas detection function with a compact Fabry-Perot interferometer structure integrated into a single device. The interferometer cavity, gas sampling region, and optical detection components are combined into one integrated unit, simplifying the overall structure compared to conventional multi-component gas sensor systems while maintaining reliable detection functionality.
Solution Approach 2:
The patent replaces complex mechanical and chemical sensing mechanisms with a streamlined optical interference system. The Fabry-Perot interferometer provides a simpler structural approach to gas detection, eliminating the need for complex heating elements, catalysts, or multiple optical components required by conventional sensors, thereby reducing both structural complexity and cost.
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 device provides accurate gas concentration monitoring with improved sensitivity and cost-effectiveness, suitable for market-oriented applications, reducing the risk of gas-related hazards in kitchens.
Implementation Method 1
the gas-sensitive film layer is configured to adsorb the gas to be detected
Implementation Method 2
the reflective film is configured to move the second end surface toward the first end surface according to a mass of the gas adsorbed by the gas-sensitive film layer
Implementation Method 3
the light transmission module is configured to input incident light to the cavity through the first end surface
Implementation Method 4
adjust a distance between the second end surface and the first end surface according to a concentration of a gas to be detected
Data Source
AI summary
The present disclosure provide a gas monitoring device, a gas monitoring system, a gas monitoring method, a cabinet, and a computer readable storage medium. The gas monitoring device includes: a tubular housing, a light transmission module arranged at one end of the tubular housing, and a gas detecting module arranged at the other end of the tubular housing, in which a first end surface of the light transmission module, a second end surface of the gas detecting module and the tubular housing form a cavity, and the first end surface and the second end surface are parallel to each other; the light transmission module is configured to input incident light to the cavity, and the gas detecting module is configured to adjust a distance between the second end surface and the first end surface according to a concentration of the gas to be detected.