Puff Sensor Filtering for Aerosol Heater Power Control
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Solution Overview
Problem
Aerosol-generating devices face challenges in accurately filtering signals from puff sensors, particularly due to variations in user puff time periods, which affect the filtering accuracy and power adjustment in aerosol generation.
Innovation Solution
The device includes a controller that determines specific frequencies corresponding to different puff time periods, filters the signal using these frequencies, and adjusts the power supplied to the heater based on the filtering results, employing digital filtering techniques to improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If digital filtering using multiple frequencies is applied to puff sensor signals, then filtering accuracy is improved, but device complexity increases
Solution Approach 1:
The filtering process is segmented into multiple frequency bands (first frequency corresponding to first puff time period, second frequency corresponding to second puff time period). The controller separates the signal processing into distinct frequency components, allowing accurate filtering of different puff characteristics while maintaining manageable complexity through structured segmentation.
Solution Approach 2:
The filtering approach dynamically adapts to different puff time periods by applying different frequencies. The system adjusts its filtering characteristics based on the detected puff duration, enabling accurate signal processing for both short and long puffs without requiring a fixed, overly complex filtering structure.
2Adaptability or versatility
If filtering is based on multiple frequencies corresponding to different puff time periods, then adaptability to user behavior is improved, but processing time increases
Solution Approach 1:
The controller pre-establishes the relationship between puff time periods and corresponding frequencies before actual signal filtering. By having the first and second frequencies predetermined and ready, the system can quickly adapt to different user puff patterns without performing complex real-time frequency analysis, thus reducing processing time while maintaining high adaptability.
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 approach enables accurate filtering of puff sensor signals and improves the accuracy of power adjustment based on user puff time periods, enhancing the overall performance of the aerosol-generating device.
Implementation Method 1
a heater configured to heat an aerosol-generating substance
Implementation Method 2
a puff sensor configured to detect a puff
Data Source
AI summary
An aerosol-generating device and an operation method thereof are disclosed. The aerosol-generating device of the disclosure includes a heater configured to heat an aerosol-generating substance, a puff sensor configured to detect a puff, and a controller configured to process a signal from the puff sensor. The controller determines a first frequency corresponding to a first puff time period and a second frequency corresponding to a second puff time period, which is longer than the first puff time period, filters the signal from the puff sensor based on the first frequency and the second frequency, and adjusts the power supplied to the heater based on the result of filtering. The first frequency is a frequency lower than the second frequency.