Gas Sensor Housing Micro-Resonator Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing gas sensors face challenges in achieving high sensitivity and selectivity for trace gas detection in harsh environments, such as extreme temperatures, corrosive conditions, and turbulence, while also needing to comply with stringent standards like IEC 60079-28 for field applications.
Innovation Solution
The design incorporates a housing with micro-resonators and optical devices aligned within a cavity, using quartz-enhanced photo-acoustic spectroscopic (QEPAS) technology, where the optical energy absorbed by gas molecules changes the resonant frequency of a quartz tuning fork, allowing for precise gas concentration measurement, and employs materials like aluminum, stainless steel, and glass for durability and resistance to corrosive gases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional gas sensor designs are used, then the device structure is simple, but the sensitivity and measurement precision for trace gas detection are insufficient
Solution Approach 1:
The patent employs a quartz tuning fork that vibrates at a specific resonant frequency to detect gas molecules. The mechanical vibration of the tuning fork interacts with gas molecules through inelastic collisions, causing frequency shifts that are measured to determine gas concentration. This vibration-based detection mechanism significantly enhances trace gas detection sensitivity compared to traditional static sensor designs.
Solution Approach 2:
The patent introduces a quartz micro-resonator as an intermediary element between the optical excitation source and the detection system. The micro-resonator couples optical energy to mechanical vibrations, mediating the interaction between light and gas molecules. This intermediary mechanism enables highly sensitive detection by transducing optical signals into mechanical vibrations that can be precisely measured.
2Reliability
If standard housing materials are used, then the manufacturing cost is low, but the mechanical integrity and resistance to harsh environments deteriorate
Solution Approach 1:
The patent employs a composite housing structure combining aluminum or stainless steel with glass components. The metal housing provides mechanical strength and corrosion resistance, while glass sections offer chemical inertness and optical transparency where needed. This composite material approach enhances overall reliability in harsh environments while maintaining manufacturability through standardized material joining techniques.
Solution Approach 2:
The patent incorporates a thin membrane structure in the housing design that allows selective gas permeation while maintaining structural integrity. The membrane acts as a protective barrier that filters harsh environmental conditions from internal sensor components while permitting target gas molecules to reach the detection chamber, thereby enhancing reliability without compromising manufacturability.
3Measurement precision
If alignment tolerances are loose, then the ease of assembly is high, but the measurement precision and sensitivity are reduced
Solution Approach 1:
The patent incorporates pre-aligned optical-b mechanical coupling features directly into the housing and sensor module design. Optical alignment marks and mechanical registration features are pre-positioned during manufacturing, allowing assembly workers to simply mate components together without requiring complex alignment procedures. This preliminary preparation of alignment features maintains high measurement precision while dramatically simplifying the assembly process.
Solution Approach 2:
The patent designs the housing with integrated optical-b mechanical coupling features that create a unified reference frame for both optical and mechanical components. By establishing a common reference system during housing manufacturing, the patent eliminates the need for separate alignment operations, making assembly as straightforward as joining equipotential surfaces while ensuring precise optical-mechanical coordination for high measurement accuracy.
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
This configuration enhances the sensitivity and accuracy of gas detection, maintains mechanical integrity in harsh conditions, and meets regulatory standards for field applications, enabling effective monitoring of trace gases and impurities.
Implementation Method 1
using quartz-enhanced photo-acoustic spectroscopic (QEPAS) technology, where the optical energy absorbed by gas molecules changes the resonant frequency of a quartz tuning fork
Implementation Method 2
the optical energy absorbed by gas molecules changes the resonant frequency of a quartz tuning fork
Data Source
AI summary
A module for a gas sensor module is described herein. The module can include a first portion. The first portion of the module can include a first body and at least one first micro-resonator coupling feature disposed in and traversing the first body. The first body can be configured to be disposed within a cavity of a housing of the gas sensor. The at least one first micro-resonator coupling feature can be configured to align with at least one optical device of the gas sensor when the first body is disposed within the cavity of housing of the gas sensor. The at least one first micro-resonator coupling feature can be configured to have at least one first micro-resonator disposed therein.