Piezoelectric Insertion Sensing in Aerosol Article Cavities

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Solution Overview

Problem

Existing aerosol generating devices face issues with sensor malfunctions due to environmental conditions like temperature and humidity, leading to reduced reliability and safety, especially when detecting aerosol generating article insertion.

Innovation Solution

The use of a piezoelectric pressure sensor to detect aerosol generating article insertion by measuring pressure changes, providing robust detection that is less sensitive to environmental influences and droplet deposition.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional sensors are used to detect aerosol generating article insertion, then the device can identify insertion status, but the sensors are sensitive to environmental conditions (temperature, humidity) and droplet deposition, causing malfunctions and reduced reliability

Engineering Contradiction:

Improvesensor reliabilityVSAvoidenvironmental sensitivity

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces conventional electrical sensors with a piezoelectric pressure sensor that detects insertion through mechanical pressure changes. When the aerosol generating article is inserted, it applies physical pressure to the sensor, generating an electrical signal. This mechanical detection method is inherently less sensitive to environmental factors like temperature and humidity compared to conventional electrical sensors, thereby improving reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the detection parameter from electrical field-based sensing to mechanical pressure-based sensing. By measuring the physical pressure applied during insertion rather than relying on electrical properties, the system becomes more robust against environmental conditions and droplet deposition that affect electrical sensors.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If various sensors are provided in the aerosol generating apparatus, then multiple functions can be detected, but sensor malfunction may shorten the lifetime of the device or cause failure

Engineering Contradiction:

Improvedetection functionVSAvoiddevice lifetime

Core Design Contradiction:

Adaptability or versatilityVSDuration of action of stationary object

Solution Approach 1:

By replacing conventional electrical sensors with a piezoelectric pressure sensor, the patent reduces the likelihood of sensor malfunction. The piezoelectric mechanism is more robust and less prone to fatigue from frequent use, thereby extending the device's operational lifetime while maintaining the necessary detection functionality.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent employs a piezoelectric pressure sensor that is more durable and less prone to failure, effectively creating a longer-lasting detection component. This reduces the frequency of sensor replacement and maintenance, extending the overall device lifetime.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Measurement precision

If conventional insertion detection methods are used, then insertion can be detected, but the detection is sensitive to temperature or humidity and droplet deposition from frequent use

Engineering Contradiction:

Improveinsertion detection accuracyVSAvoidenvironmental influence sensitivity

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent substitutes electrical sensing with mechanical pressure sensing. The piezoelectric pressure sensor detects insertion through direct physical contact and pressure application, which is不受affected by environmental factors like temperature and humidity that cause malfunction in conventional electrical sensors, thereby maintaining accurate detection under various conditions.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

By changing the detection parameter from electrical properties to mechanical pressure, the system achieves more stable and accurate insertion detection. The mechanical pressure signal generated by insertion is distinct and reliable,不受influenced by environmental conditions or droplet deposition that interfere with electrical sensing.

Inventive Principle:

Principle #35Parameter changes

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

Accurate detection of aerosol generating article insertion is achieved, enhancing the reliability and safety of the device by minimizing the impact of environmental factors and droplet deposition.

Implementation Method 1

detect, by using a piezoelectric pressure method, pressure applied by pressing of the protruding portion due to a contact with the aerosol generating article

Methodology Applied

Scientific EffectPiezoelectric effect: Piezoelectric Effect

Data Source

PatentUS20260053197A1Aerosol generating apparatus

Publication Date: 2026.02.26 KT&G CO LTD

AI summary

An aerosol generating apparatus includes a cavity housing for providing a cavity in which at least a portion of an aerosol generating article is accommodated, an insertion detection sensor which has at least a portion protruding into the cavity and which is configured to, when the aerosol generating article is inserted into the cavity housing, detect, by using a piezoelectric pressure method, pressure applied by pressing of the protruding portion due to contact with the aerosol generating article, and a controller configured to determine, based on an intensity of the detected pressure, whether the aerosol generating article is inserted into the aerosol generating apparatus.