Inductive Sensor Calibration for Aerosol Article Insertion Detection
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Solution Overview
Problem
Aerosol generating devices using inductive sensors face challenges in accurately detecting events like cap coupling or cigarette insertion due to variations in sensing values influenced by environmental factors such as temperature and humidity, leading to incorrect event detection.
Innovation Solution
The device includes a controller that calibrates the inductive sensor's reference values based on initial sensing values in a natural state, ensuring accurate detection by maintaining a consistent difference between the sensing and reference values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inductive sensor is used to detect events like cap coupling or cigarette insertion, then the device can detect whether a magnetic object approaches, but the sensing value changes due to environmental factors such as temperature and humidity, leading to incorrect event detection
Solution Approach 1:
The patent applies preliminary action by storing a reference sensing value before environmental changes occur. This reference value serves as a baseline for comparison, allowing the system to detect events accurately despite subsequent changes in temperature or humidity. The controller compares current sensing values against this pre-stored reference to determine whether actual events like cap coupling or cigarette insertion have occurred.
Solution Approach 2:
The patent implements feedback by continuously monitoring the sensing value and comparing it with the stored reference value. When a deviation exceeds a predetermined threshold, the system generates an appropriate signal indicating an event has occurred. This feedback mechanism allows the system to adapt to environmental changes while maintaining reliable event detection through continuous comparison and threshold-based decision making.
2Device complexity
If the controller determines events based on the sensing value alone, then the device structure remains simple, but the sensing value changes regardless of user's intention, causing false detection
Solution Approach 1:
The patent applies preliminary action by storing a reference sensing value before environmental changes occur. This reference value serves as a baseline for comparison, allowing the system to detect events accurately despite subsequent changes in temperature or humidity. The controller compares current sensing values against this pre-stored reference to determine whether actual events like cap coupling or cigarette insertion have occurred.
Solution Approach 2:
The patent applies parameter changes by introducing a reference sensing value as an additional parameter for comparison. Instead of relying solely on the absolute sensing value, the system evaluates the difference between the current sensing value and the reference value. This parameter transformation allows the system to distinguish between environmental fluctuations and actual events, improving detection reliability without significantly increasing device 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
This calibration method enhances the device's ability to reliably detect cap coupling and cigarette insertion, improving user convenience and operational accuracy.
Implementation Method 1
an inductive sensor configured to generate a sensing value according to a distance to a magnetic object
Data Source
AI summary
An aerosol generating device includes a body including an insertion space to accommodate an aerosol generating article, a heater configured to heat the aerosol generating article accommodated in the insertion space, an inductive sensor configured to generate a sensing value according to a distance to a magnetic object, and a controller electrically connected to the inductive sensor and configured to determine a degree of proximity of the magnetic object to the body by comparing the sensing value with a reference value as a reference for determination, wherein the controller is further configured to calibrate the reference value based on the sensing value such that the reference value maintains a certain difference from the sensing value.