Proximity Sensor Air Quality Sensing via Light Reflection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing air quality detection devices are large, expensive, and require specialized operators, making them unsuitable for widespread use, particularly in monitoring PM 2.5 particles, which pose a significant air pollution threat.
Innovation Solution
An electronic device equipped with a proximity sensor comprising a light source and light sensor, coupled with a processor and memory, that maps intensity values of reflected light to air quality values using an air quality table, optionally with a PM 2.5 filter to control particulate matter size, and can connect to an air purifier when air quality thresholds are exceeded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing air quality detection devices are used, then air quality monitoring function is achieved, but device size is large and cost is high
Solution Approach 1:
The patent combines the air quality sensing function with an existing proximity sensor in a mobile device. The proximity sensor's light source and light sensor are used to detect particulate matter by measuring reflected light intensity, merging two functions (proximity detection and air quality monitoring) into a single device component, thereby reducing overall device size and complexity.
Solution Approach 2:
The proximity sensor is made multi-functional by enabling it to perform both its original proximity detection function and a new air quality monitoring function. The same light source and light sensor are used for both purposes, making the device universal and eliminating the need for separate dedicated air quality sensors.
2Measurement precision
If existing air quality detection devices are used, then air quality monitoring function is achieved, but operation and maintenance require specialized operators and involve cumbersome processes
Solution Approach 1:
The system performs self-calibration and automatic measurement of air quality parameters. The processor automatically calculates particulate matter concentration based on reflected light intensity without requiring manual calibration or specialized operator intervention. The device autonomously monitors air quality and can automatically trigger air purifiers when thresholds are exceeded.
Solution Approach 2:
The patent replaces complex mechanical air quality detection systems with an optical-based detection method using light reflection principles. This substitution simplifies the measurement process, eliminating the need for complex mechanical sampling systems and specialized operational procedures while maintaining measurement accuracy.
3Measurement precision
If existing air quality detection devices are used, then air quality monitoring function is achieved, but cost is expensive
Solution Approach 1:
By making the proximity sensor multi-functional, the patent eliminates the need to manufacture and install separate expensive air quality sensors. The same optical components serve dual purposes, significantly reducing manufacturing costs while maintaining air quality monitoring capability.
Solution Approach 2:
The patent uses the existing optical detection mechanism of the proximity sensor as a template for air quality detection. By copying the light emission and detection principle already present in the device, the system avoids the need for specialized expensive sensing hardware while achieving comparable measurement 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 provides a cost-effective, user-friendly method for monitoring air quality using existing electronic devices, enabling real-time air quality sensing and automatic air purification when necessary, without requiring significant hardware changes.
Implementation Method 1
The light source emits light toward particulate matter in air
Implementation Method 2
the light is reflected by a surface of the particulate matter to form reflected light
Implementation Method 3
The light sensor senses the reflected light
Implementation Method 4
the PM 2.5 filter comprises a chamber having at least a size selective inlet, wherein the size selective inlet controls a size of the particulate matter flowing through the chamber
Implementation Method 5
the lens is disposed on an optical path of the light source and focuses the reflected light to increase sensitivity
Data Source
AI summary
An electronic device for sensing air quality is provided. The electronic device includes a proximity sensor, a processor and a memory. The proximity sensor at least includes a light source and a light sensor. The light source emits light toward particulate matter in air, wherein the light is reflected by a surface of the particulate matter to form reflected light. The light sensor senses the reflected light. The processor is coupled to the proximity sensor, and the memory is operatively coupled to the processor. The processor is configured to execute program code stored in the memory by: obtaining an air quality value corresponding to an intensity value of the reflected light according to an air quality table.