Gas Detection Optical Path Stabilization via Dual Joint Members
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Solution Overview
Problem
Gas detection apparatuses face sensitivity fluctuations due to thermal expansion, which causes distortions in the optical path and alters the relative positions of optical surfaces, affecting detection accuracy.
Innovation Solution
The apparatus incorporates a substrate with a light emitting element and a light receiving element, a light guide member, a first joint member, and a second joint member. The first joint member restricts displacement in specific directions, while the second joint member allows for limited displacement orthogonal to the substrate, mitigating thermal expansion-induced distortions by maintaining the optical path integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the optical path pipe is securely joined to the substrate and case by grooves and fixing members, then the structural stability is improved, but thermal expansion causes distortions of the substrate and case that are transmitted to the optical path pipe, distorting the optical path or altering the relative positions of optical surfaces
Solution Approach 1:
The fixing structure is divided into multiple fixing members (first fixing member and second fixing member) that are distributed at different positions on the substrate. Each fixing member independently secures the optical path pipe, distributing the thermal stress and preventing concentrated distortions that would affect the optical path.
Solution Approach 2:
The fixing members are positioned at specific locations away from the optical path critical areas. The grooves and fixing members create localized attachment points that provide structural stability without constraining the optical path pipe in regions that would distort the optical path or alter optical surface positions.
2Stability of the object's composition
If multiple fixing members are used to secure the optical path pipe, then the structural stability is improved, but the complexity of the device increases
Solution Approach 1:
The first fixing member and second fixing member are integrated into a single substrate structure, forming a unified fixing system. This merging approach provides distributed structural stability while avoiding the complexity of separate, independent fixing mechanisms.
Solution Approach 2:
The substrate itself serves as the fixing structure through integrated grooves and fixing members, eliminating the need for additional external fixing components. The substrate's own structure provides the necessary stability, reducing overall device complexity.
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 effectively suppresses optical path distortions and maintains detection sensitivity by allowing controlled movement of the light guide member relative to the substrate, ensuring consistent gas detection performance.
Implementation Method 1
a light guide member for guiding the light emitted by the light emitting element to the light receiving element
Implementation Method 2
when a thermal expansion causes a distortion
Data Source
AI summary
A gas detection apparatus 1 includes a substrate 2; a light emitting element 3 provided on a main surface of the substrate for emitting light; a light receiving element 4 provided on the main surface of the substrate 2 for receiving the light; a light guide member 5 for guiding the light emitted by the light emitting element 3 to the light receiving element; a first joint member 6; and a second joint member 7. The first joint member joins the substrate and the light guide member, limits a displacement in a direction parallel and/or orthogonal to the main surface of the substrate. The second joint member joins the substrate and the light guide member, limits a displacement of the light guide member in a direction parallel to the main surface of the substrate and/or limits a displacement within a plane orthogonal to the main surface of the substrate.