Composite Gas Dust Sensor Single Heat Source

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Solution Overview

Problem

Existing gas and dust sensors are large, expensive, and require separate heat sources, limiting their use in harsh environments and making them unsuitable for compact, low-power applications.

Innovation Solution

A composite sensor design that uses a single heat source to drive both a gas sensor and a dust sensor, with a heat transfer wall to share thermal energy between modules, eliminating the need for a separate heat source in the dust sensor module.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate heat sources are used for gas sensor and dust sensor, then each sensor can operate independently with optimal performance, but the overall device size and power consumption increase

Engineering Contradiction:
Improvesensor performanceVSAvoidpower consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent combines the heat sources of the gas sensor and dust sensor into a single shared heat generation unit. This merging approach allows both sensors to operate simultaneously using the same thermal energy source, thereby reducing overall power consumption while maintaining the functional independence and performance of each sensor module.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The single heat source is designed to serve multiple functions: it provides thermal energy for both the gas sensor operation and the dust sensor operation. This multi-functional heat source replaces what would traditionally require two separate heat sources, achieving both sensors' operational requirements with a unified thermal management system.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If separate heat sources are used for gas sensor and dust sensor, then each sensor module is independent, but the device complexity and manufacturing cost increase

Engineering Contradiction:
Improvesensor independenceVSAvoiddevice structure
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges the heat generation functionality into a single shared component that serves both the gas sensor module and the dust sensor module. This reduces the number of independent heat source components from two to one, simplifying the overall device structure and reducing manufacturing complexity while preserving the functional independence of each sensing module through separate optical paths and detection systems.

Inventive Principle:
Principle #5Merging (Combining)

3Reliability

If traditional gas and dust sensors are used, then sensing functionality is provided, but the device size is large and不适合 for compact applications

Engineering Contradiction:
Improvesensing capabilityVSAvoiddevice size
Core Design Contradiction:
ReliabilityVSVolume of moving object

Solution Approach 1:

The patent integrates the gas sensing module and dust sensing module into a single compact device with a shared heat source and integrated optical system. This merging of previously separate sensor systems into one unified structure significantly reduces the overall device volume while maintaining the sensing capabilities of both gas and dust detection functions.

Inventive Principle:
Principle #5Merging (Combining)

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 solution results in a compact, low-power composite sensor that can efficiently sense both gas and dust, reducing power consumption and size while maintaining effective performance in harsh environments.

Implementation Method 1

a heat transfer wall configured to transfer heat generated by the first light source to the dust sensor module

Methodology Applied
Scientific EffectHeat transfer: Conduction (thermal)

Implementation Method 2

an infrared detecting sensor (IR detecting sensor) which selectively detects a reduction amount of a specific wavelength range band among infrared light passing through a measurement gas atmosphere

Methodology Applied
Scientific EffectInfrared absorption: Absorption (EM radiation)

Implementation Method 3

a dust sensor module including a dust sensor, a lens, and a second light source in a second space

Methodology Applied
Scientific EffectLight scattering: Scattering

Data Source

PatentUS11137363B2Composite sensor for sensing gas and dust by using single heat source
Publication Date: 2021.10.05 LG ELECTRONICS INC
  • US11137363B2 patent drawing
  • US11137363B2 patent drawing
  • US11137363B2 patent drawing

AI summary

A composite sensor for sensing gas and dust by using a single heat source, according to an embodiment of the present invention, can comprise: a base; a gas sensor module comprising a gas sensor and a first light source in a first space; a dust sensor module comprising a dust sensor, a lens, and a second light source in a second space; and a heat transfer wall for transferring heat generated by the first light source to the dust sensor module.