Aerosol Stick and Puff Detection Using a Single Color Sensor
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Solution Overview
Problem
Conventional aerosol-generating devices require separate sensors for recognizing aerosol-generating articles and user puffs, leading to increased complexity and manufacturing costs.
Innovation Solution
An aerosol-generating device utilizing a single sensor to recognize both aerosol-generating articles and user puffs through color changes detected via a sensor unit, which includes a discoloration member adjacent to an airflow channel, and a processor to analyze these changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate sensors are used for stick recognition and puff recognition, then recognition accuracy is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines stick recognition and puff recognition functions into a single sensor unit. The sensor detects color changes of the aerosol-generating article under different conditions: one wavelength detects the article's presence (stick recognition), while another wavelength detects temperature-induced color changes during user puffs (puff recognition). This merging eliminates the need for separate sensors, reducing device complexity while maintaining recognition accuracy.
Solution Approach 2:
The single sensor unit is designed to perform multiple functions: it recognizes both the presence of the aerosol-generating article and detects user puffs by monitoring temperature-related color changes. The sensor operates across different wavelengths to distinguish between article detection and puff events, making it a universal sensing solution that replaces multiple specialized sensors.
2Reliability
If separate sensors are used for stick recognition and puff recognition, then functional reliability is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges stick recognition and puff recognition into a single sensor unit, reducing the total number of components that need to be manufactured and assembled. This consolidation lowers manufacturing costs while maintaining the functional reliability needed for both recognition tasks through multi-wavelength detection capabilities.
3Device complexity
If a single sensor is used for both stick and puff recognition, then device complexity is reduced, but measurement precision may be compromised
Solution Approach 1:
The patent uses parameter changes in the detection wavelength to distinguish between stick recognition and puff recognition. The sensor detects color changes at different wavelengths: one wavelength range detects the article's inherent color (stick recognition), while another wavelength range detects temperature-induced color changes (puff recognition). This parameter differentiation maintains measurement precision despite using a single sensor.
Solution Approach 2:
The patent exploits color changes of the aerosol-generating article under different conditions. The article contains temperature-sensitive coloring material that changes color with temperature variations during puffs. The sensor detects these color changes by comparing reflectance or absorbance at different wavelengths, enabling precise puff detection while maintaining stick recognition capability.
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 efficient and economical recognition of both stick and puff events using a single sensor, reducing device complexity and manufacturing costs.
Implementation Method 1
a discoloration member (100) configured to include at least a discoloration material (103) that discolors with a temperature change
Implementation Method 2
a sensor unit (13) configured to detect a color change of at least a partial area of the aerosol-generating device (1) into which the aerosol-generating article (2) is inserted
Implementation Method 3
a temperature transmitter (200) having a thermal conductivity greater than a predetermined value and connected to the heating body and the discoloration member (100) to conduct heat from the heating body to the discoloration member (100)
Data Source
AI summary
An aerosol-generating device is disclosed. The aerosol-generating device according to various embodiments of the present invention may include: a housing including an insertion space open to allow insertion of at least a portion of an aerosol-generating article; a sensor unit; an airflow channel through which air flows into the housing; and at least one processor configured to recognize an insertion of the aerosol-generating article through the sensor unit, detect a color change due to the inflow of the air through the sensor unit for at least a portion of the aerosol-generating device into which the aerosol-generating article is inserted, and recognize a puff of a user based on the detected color change.