Aerosol Heater Activation Using Contact Sequence Sensing
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Solution Overview
Problem
There is a need to prevent aerosol generating devices from being activated due to user contact for reasons other than smoking, as existing devices lack precise activation mechanisms.
Innovation Solution
An aerosol generating device equipped with a capacitive sensor and a controller that differentiates between contact through a first conductive element (e.g., the device's housing) and a second conductive element (e.g., the mouthpiece) to determine the intent of the user, activating the heater only when appropriate contact for smoking is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the device uses a simple contact sensor to detect user contact, then the device can be activated easily, but the device may be accidentally activated due to non-smoking contact
Solution Approach 1:
The capacitive sensor is divided into multiple sensing regions (first sensing region on the mouthpiece and second sensing region on the housing). Each region independently detects contact, and the controller analyzes the sequence and location of contacts to determine user intent. This segmentation allows the system to distinguish between intentional smoking contact (mouthpiece first) and accidental contact (housing first), resolving the contradiction between ease of activation and activation accuracy.
2Reliability
If the device requires complex contact sequence detection to prevent accidental activation, then activation accuracy improves, but the device complexity increases
Solution Approach 1:
The capacitive sensor serves multiple functions: it detects both the presence of contact and the location of contact (mouthpiece vs. housing). The same sensor component provides both spatial information and activation trigger information, eliminating the need for separate sensors for each function. This multi-functionality reduces overall device complexity while maintaining high activation accuracy.
3Speed
If the device activates the heater immediately upon any contact, then the response time is fast, but accidental activation occurs
Solution Approach 1:
The device performs preliminary detection of contact location and sequence before activating the heater. The capacitive sensor detects contact in advance and the controller analyzes whether the contact pattern matches the expected smoking sequence (mouthpiece contact before or simultaneously with housing contact). Only after this preliminary verification does the heater activate, ensuring fast response time while preventing accidental activation.
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
Ensures the device is activated only when the user intends to smoke, preventing accidental activation.
Implementation Method 1
a capacitive sensor, a controller, a first conductive element, a second conductive element, and a heater, wherein the controller controls power supplied from the battery to the heater based on an order of a first time point at which the capacitive sensor senses contact of a user through the first conductive element
Data Source
AI summary
An aerosol generating device includes a battery, a capacitive sensor, a controller, a first conductive element, a second conductive element, and a heater, wherein the controller is configured to control power supplied from the battery to the heater based on an order of a first time point at which the capacitive sensor senses contact of a user through the first conductive element and a second time point at which the capacitive sensor senses contact of the user through the second conductive element.