Sensor Device Pollutant Detection Using Particle Size Histograms
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Solution Overview
Problem
Current pollutant detection systems, such as vape and smoke detectors, are limited in their ability to accurately detect and locate sources of pollutants in open areas, as they typically rely on fixed threshold measurements and cannot differentiate between varying particle sizes over time, leading to poorly defined alerts and inability to pinpoint the source of pollutants.
Innovation Solution
A networked array of sensors using histograms to represent particle sizes and changes over time, allowing for the detection and localization of pollutants by comparing sensor data, with machine learning to improve performance and reduce false alarms, and incorporating multiple sensor types for comprehensive environmental monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fixed threshold measurements are used for pollutant detection, then the system is simple to operate, but the measurement precision and ability to locate pollutant sources is poor
Solution Approach 1:
The patent segments the pollutant detection task by deploying multiple sensors across different locations rather than relying on a single complex sensor. Each sensor performs simple threshold measurements, but the collective array enables precise localization through spatial distribution and histogram comparison of particle size data across multiple measurement points.
Solution Approach 2:
The patent adds the spatial dimension to pollutant detection by arranging sensors in a networked array across the environment. This transforms the detection problem from a single-point threshold measurement into a multi-dimensional spatial analysis using particle size histograms from multiple locations, enabling source localization without requiring complex individual sensors.
2Adaptability or versatility
If single purpose modules with narrow scope are used, then the device complexity is reduced, but the adaptability to detect various pollutants and environmental conditions is limited
Solution Approach 1:
The patent implements universality by using identical particle size measurement sensors for multiple detection purposes - detecting vaping particles, smoke, dust, and other airborne contaminants. The same sensor type and measurement methodology serve diverse pollutant detection needs, achieving versatility without increasing individual sensor complexity.
Solution Approach 2:
The patent achieves adaptability by monitoring changes in particle size distribution parameters over time through repeated histogram measurements. Different pollutants produce characteristic particle size profiles and temporal evolution patterns, allowing the system to identify various contaminants using the same sensor with appropriate parameter analysis.
3Reliability
If simple threshold-based alarms are used, then the ease of operation is improved, but the reliability for accurate pollutant identification and source localization is poor
Solution Approach 1:
The patent implements feedback by continuously comparing particle size histograms from multiple sensor locations against each other and against known pollutant profiles. This comparative analysis provides feedback that enables reliable pollutant identification and source localization while maintaining automated operation that remains simple to use.
Solution Approach 2:
The patent applies preliminary action by pre-establishing the sensor array configuration and particle size histogram comparison methodology before deployment. The system is pre-configured with the spatial arrangement of sensors and the analytical framework for comparing histograms, enabling reliable detection from the start without requiring complex real-time adjustments.
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
Enables accurate detection and location of pollutants, including vaping and smoking, in various environments by analyzing particle size distributions and changes, providing precise alerts and improving system reliability over time.
Implementation Method 1
Recent advances in Mie Scattering particle detection sensors allow particles of various sizes to be measured
Data Source
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AI summary
Embodiments of a sensor device, method and system employ one or more particle detection sensors to collect particle measurement values in a plurality of particle bins collecting particles of different sizes, generate a histogram representing the particle measurement values and determine based on a comparison of the histogram with a profile histogram for a pollutant, a match quality indicative of whether the pollutant is present in the environment. In various embodiments, a location of a pollutant is also determined according to the determined match quality.