Particle Detector Stray Light Suppression Structure
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Solution Overview
Problem
Existing particle detecting modules face challenges in reducing their thickness and weight while maintaining detection accuracy, particularly due to the complexity of gas-guiding channels and the impact of miniaturization on laser detection.
Innovation Solution
The proposed detection accuracy enhancing structure includes an anti-scatter structure and two stray light suppression treatment structures, which are integrated into the gas-inlet groove and light trapping region of the particle detecting module. These structures help reduce stray light reflections and improve the reception of scattered light spots by the particulate sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If the particle detecting module is designed to be light and thin, then the portability is improved, but the detection accuracy of laser detection is deteriorated
Solution Approach 1:
The patent applies local quality by creating a specialized light trapping region with specific optical properties within the base structure. This region has different characteristics from other parts of the device, specifically designed to trap and guide stray light away from the detection path, thereby maintaining detection accuracy in the miniaturized structure.
Solution Approach 2:
The patent introduces an intermediary light trapping region between the laser component and the particulate sensor. This intermediary structure mediates the optical path by capturing stray light that would otherwise interfere with detection, allowing the module to maintain thin dimensions while preserving detection accuracy.
2Ease of operation
If the gas-guiding channel is designed in multiple layers, then the gas flow guidance is improved, but the thickness of the module is increased
Solution Approach 1:
The patent merges the gas-guiding function with the base structure itself. The gas-inlet groove and gas-outlet groove are integrated directly into the base, eliminating the need for separate multi-layer gas-guiding channels. This integration maintains effective gas flow guidance while significantly reducing the overall module thickness.
Solution Approach 2:
The patent transitions from a multi-layer vertical gas guidance structure to a planar groove-based structure within the base. By utilizing the surface dimension of the base for gas flow guidance through grooves, the design eliminates the need for multiple stacked layers, thereby reducing thickness while maintaining gas flow control functionality.
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 solution enhances the detection accuracy of suspended particles without distorting the results, thereby improving the efficiency of the particulate sensor and maintaining the module's lightweight and thin design.
Implementation Method 1
a laser component (4)
Implementation Method 2
the scattered light spots of the suspended particles are more easily to be received and calculated by the particulate sensor
Data Source
AI summary
A detection accuracy enhancing structure of a particle detecting module is provided. A detection accuracy enhancing structure comprises an anti-scatter structure and two stray light suppression treatment structures. The anti-scatter structure is disposed in the gas-inlet groove of the base corresponding to a projection area of the laser component. The two stray light suppression treatment structures are respectively arranged in the light trapping region and the gas-inlet groove corresponding to the projection area of the laser component. When the light beam emitted from the laser component is reflected to the light trap region and the gas-inlet groove, the anti-scatter structure and the two stray light suppression treatment structures reduce a stray light directly reflected to the particulate sensor, so as to enhance the detection accuracy.