Dual-Sensor Switch Circuit for Airflow-Based E-Cigarette Power Control
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Solution Overview
Problem
Current electronic cigarettes fail to accurately reflect the user's smoking process and adjust atomizing power effectively, using microphone switches or key buttons that cannot truly identify the intensity of smoking actions.
Innovation Solution
A switch control circuit with a sensing circuit, including a heating part and two sensors, and a controller that compares voltage differentials to adjust atomizing power, providing action signals to initiate or close the electronic cigarette based on airflow changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a microphone switch is used to detect smoking actions, then the electronic cigarette can identify whether a smoking action exists, but it cannot identify the intensity of the smoking action or the amount of capacitance change
Solution Approach 1:
The patent divides the single sensor detection into two separate sensors positioned at different locations (first sensor near the mouthpiece, second sensor near the heating element). This segmentation allows each sensor to detect voltage changes independently, and the controller compares these changes to determine both the existence and intensity of smoking actions, thereby recovering the lost capacitance change information.
Solution Approach 2:
The patent transitions from one-dimensional detection (single sensor detecting presence/absence) to two-dimensional detection (two sensors detecting voltage changes at different positions). By comparing the voltage changes from both sensors, the system gains additional dimensional information about the smoking action intensity and characteristics, enabling more precise measurement.
2Ease of operation
If a key button is used to control the electronic cigarette, then the user can initiate or adjust atomizing power, but it cannot truly reflect the user's smoking process
Solution Approach 1:
The patent enables the electronic cigarette to automatically detect and respond to smoking actions through the dual sensor system and controller. The system self-regulates by comparing voltage changes from both sensors and automatically adjusting atomizing power accordingly, eliminating the need for manual key button operation while truly reflecting the user's smoking process.
Solution Approach 2:
The patent implements a feedback mechanism where the controller continuously monitors voltage changes from both sensors, compares them against preset thresholds, and adjusts the atomizing power in real-time based on the detected smoking action intensity. This closed-loop feedback system ensures the electronic cigarette truly reflects and responds to the user's smoking process.
3Device complexity
If single sensor detection is used, then the circuit structure is simple, but it cannot accurately determine smoking action intensity or adjust atomizing power accordingly
Solution Approach 1:
The patent segments the detection function into two separate sensors positioned at different locations within the air flow path. The first sensor is positioned near the mouthpiece while the second sensor is positioned near the heating element. This segmentation enables the system to detect voltage changes at multiple points, allowing accurate determination of smoking action intensity through comparison.
Solution Approach 2:
The patent combines the outputs from both sensors by having the controller compare the voltage changes from each sensor. By merging the detection data from both sensors and comparing them against preset thresholds, the system achieves accurate smoking action intensity detection and appropriate atomizing power adjustment without excessive complexity.
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 allows for a more accurate representation of the user's smoking actions and improves the electronic cigarette experience by adjusting atomizing power in real-time based on airflow variations, enhancing user satisfaction and safety.
Implementation Method 1
the heating part is disposed between the first sensor and the second sensor for conveying heat to the first sensor and the second sensor
Implementation Method 2
the heating part is disposed between the first sensor and the second sensor for conveying heat to the first sensor and the second sensor
Implementation Method 3
the first sensor is configured for detecting a first voltage generated by change of temperatures when an air flow is flowing over the first sensor
Implementation Method 4
the second sensor is configured for detecting a second voltage generated by change of temperatures when the air flow is flowing over the second sensor
Implementation Method 5
the controller stores a preset voltage threshold and is configured for comparing a voltage differential of the first voltage and the second voltage with the preset voltage threshold
Data Source
AI summary
A switch control circuit and method for an electronic cigarette and the electronic cigarette are disclosed, the circuit includes a sensing circuit including a first sensor, a second sensor and a heating part disposed between the first sensor and the second sensor for conveying heat to the first sensor and the second sensor; the first sensor is for detecting a first voltage generated by change of temperatures when an air flow is flowing over the first sensor; the second sensor is configured for detecting a second voltage generated by change of temperatures when the air flow is flowing over the second sensor; and a controller coupled with a sensing circuit and stores a preset voltage threshold for receiving the first voltage and the second voltage, comparing a voltage differential of the first voltage and the second voltage with the preset voltage threshold, and outputting corresponding action signals based on comparison.