Reflected-Light Reuse Detection in Aerosol Generating Devices

Solution Overview

Problem

Existing aerosol generating devices face issues with reduced smoking satisfaction due to reuse of cigarettes, leading to diminished taste and atomization, necessitating a method to prevent reuse.

Innovation Solution

An aerosol generating device equipped with a reuse detection sensor that monitors light reflection from a cigarette to determine if it has been reused, controlling the heater based on sensing value changes, including a light source, reuse detection sensor, and a controller to prevent heater operation when reuse is detected.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Duration of action of moving object

If a cigarette is reused in an aerosol generating device, then the device can be used again, but the smoking taste and atomization quality deteriorate

Engineering Contradiction:

Improvecigarette reuse capabilityVSAvoidatomization quality

Core Design Contradiction:

Duration of action of moving objectVSManufacturing precision

Solution Approach 1:

The system performs preliminary detection of the cigarette's usage state before heating occurs. By using a detection sensor to measure electrical properties (resistance, capacitance, or current) of the cigarette prior to the heating process, the system can identify whether the cigarette is in a reusable state or has reached the end of its usable life, preventing quality degradation before it occurs.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system continuously monitors the electrical properties of the cigarette during the aerosol generation process and uses this feedback to determine when to stop heating. The detection sensor measures changes in resistance, capacitance, or current that occur as the cigarette is heated and consumed, providing real-time feedback to the control unit to maintain optimal atomization quality throughout the cigarette's lifecycle.

Inventive Principle:

Principle #23Feedback

2Duration of action of stationary object

If a cigarette is reused, then the device operates longer, but user satisfaction decreases due to burnt taste

Engineering Contradiction:

Improvedevice operation durationVSAvoidburnt taste

Core Design Contradiction:

Duration of action of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary detection of the cigarette's usage state before heating occurs. By using a detection sensor to measure electrical properties (resistance, capacitance, or current) of the cigarette prior to the heating process, the system can identify whether the cigarette is in a reusable state or has reached the end of its usable life, preventing quality degradation before it occurs.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system continuously monitors the electrical properties of the cigarette during the aerosol generation process and uses this feedback to determine when to stop heating. The detection sensor measures changes in resistance, capacitance, or current that occur as the cigarette is heated and consumed, providing real-time feedback to the control unit to maintain optimal atomization quality throughout the cigarette's lifecycle.

Inventive Principle:

Principle #23Feedback

3Productivity

If the heater operates on a reused cigarette, then more aerosol can be generated, but the taste and quality are compromised

Engineering Contradiction:

Improveaerosol generation volumeVSAvoidtaste consistency

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system performs preliminary detection of the cigarette's usage state before heating occurs. By using a detection sensor to measure electrical properties (resistance, capacitance, or current) of the cigarette prior to the heating process, the system can identify whether the cigarette is in a reusable state or has reached the end of its usable life, preventing quality degradation before it occurs.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system continuously monitors the electrical properties of the cigarette during the aerosol generation process and uses this feedback to determine when to stop heating. The detection sensor measures changes in resistance, capacitance, or current that occur as the cigarette is heated and consumed, providing real-time feedback to the control unit to maintain optimal atomization quality throughout the cigarette's lifecycle.

Inventive Principle:

Principle #23Feedback

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

Effectively prevents the reuse of cigarettes by accurately determining reuse through sensing value patterns, maintaining smoking satisfaction and taste.

Implementation Method 1

a light source that emits light to the cigarette inserted in the cavity; a reuse detection sensor that receives light reflected from the cigarette

Methodology Applied

Scientific EffectLight reflection: Reflection

Implementation Method 2

a heater that heats the cigarette inserted into the cavity

Methodology Applied

Scientific EffectHeating: Heating

Data Source

PatentUS20250338889A1Aerosol generating device and operation method thereof

Publication Date: 2025.11.06 KT&G CO LTD

AI summary

An aerosol generating device includes a cavity into which a cigarette is inserted, a light source that emits light to the cigarette inserted in the cavity, a reuse detection sensor that receives light reflected from the cigarette, a heater that heats the cigarette inserted into the cavity, and a controller, and the controller determines whether or not to operate the heater based on a rate of increase or decrease of a sensing value received from the reuse detection sensor.