Particle Detecting Module Thickness Reduction via Planar Gas Grooves
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Solution Overview
Problem
Conventional particle detecting modules are bulky and difficult to miniaturize due to complex and thick gas-guiding paths, making them unsuitable for integration into portable devices for real-time monitoring of suspended particle concentrations in varying environmental conditions.
Innovation Solution
A particle detecting module design featuring a base with a gas-inlet groove, a gas-guiding component loading region, and a gas-outlet groove, where a piezoelectric actuator and laser component are separated, and a driving circuit board covers the base, creating a compact structure with defined inlet and outlet paths to facilitate thin and lightweight construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional gas-guiding channel structure is used with multiple layers for gas flow, then the gas can be guided through the particle detecting module, but the thickness of the module becomes large and the structure becomes complex
Solution Approach 1:
The patent reconfigures the gas-guiding channel from a traditional multi-layer vertical structure to a planar structure where the laser component, gas-inlet groove, and particulate sensor are arranged in specific spatial relationships within a single layer base. The gas flow path is designed to move horizontally through grooves rather than vertically through multiple layers, reducing the thickness dimension while maintaining functional complexity.
Solution Approach 2:
The patent extracts the gas-guiding function from a separate multi-layer component and integrates it directly into the base structure through concavely formed grooves. This eliminates the need for additional gas-guiding layers and reduces overall module thickness while preserving the gas flow guidance capability.
2Volume of moving object
If the piezoelectric actuator and laser component are positioned close together, then the module size can be reduced, but the laser beam path may be interfered with and detection accuracy deteriorates
Solution Approach 1:
The patent creates a localized optimal environment for the laser beam path by forming a gas-inlet groove with specific geometric characteristics (width, depth, orientation) that guide gas flow perpendicular to the laser beam. This local structural optimization ensures that particles in the groove are properly illuminated by the laser while maintaining compact overall dimensions.
Solution Approach 2:
The patent resolves the spatial conflict between the piezoelectric actuator and laser component by utilizing three-dimensional spatial arrangement within the base. The components are positioned at different locations and orientations, with the gas-inlet groove serving as an intermediary structure that enables proper laser-particle interaction while accommodating both components in a compact footprint.
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 module achieves significant reduction in thickness, enabling it to be integrated into miniaturized portable electronic devices, allowing for real-time monitoring of suspended particle concentrations with improved detection efficiency and portability.
Implementation Method 1
a piezoelectric actuator... The gas is inhaled from the environment outside the base by the piezoelectric actuator
Implementation Method 2
suspended particles passing through the gas-inlet groove and irradiated by a projecting light beam emitted from the laser component are detected
Data Source
AI summary
A particle detecting module is provided. The particle detecting module includes a base, a piezoelectric actuator, a driving circuit board, a laser component, a particulate sensor and an outer cover. A gas-guiding-component loading regain and a laser loading region are separated by the base. By the design of the gas flowing path, the driving circuit board covering the bottom surface of the base, and the outer cover covering the surfaces of the base, an inlet path is defined by the gas inlet groove of the base, and an outlet path is defined by a gas outlet groove of the base. Consequently, the thickness of the particle detecting module is drastically reduced.