Optical Spectral Detector for Aerosol Substrate Identification
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Solution Overview
Problem
Aerosol-generating devices face challenges in accurately distinguishing between different types of aerosol-forming articles and monitoring their quality and usage state, leading to potential damage and poor user experience due to unsuitable heating controls and counterfeiting issues.
Innovation Solution
An aerosol-generating device equipped with a sensing assembly that uses electromagnetic radiation to identify the type of aerosol-forming substrate by measuring absorption, reflection, or transmission at various wavelengths, allowing for tailored heating profiles and quality monitoring without modifying the article or manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensing assembly with electromagnetic radiation measurement is added to identify aerosol-forming substrates, then the ability to distinguish between different article types and monitor quality is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The sensing assembly serves multiple functions: identifying article type, detecting moisture content, monitoring substrate quality, and preventing counterfeiting. This multi-functionality justifies the added complexity by consolidating what would otherwise require multiple separate detection systems.
Solution Approach 2:
The patent replaces manual inspection or simple mechanical sensors with electromagnetic radiation-based sensing (infrared or other wavelengths) to detect substrate properties. This substitution enables non-contact, rapid, and precise measurement of moisture content and material composition without physical modification of the article.
2Reliability
If electromagnetic radiation measurement is used to detect substrate properties, then the ability to monitor moisture content and quality is improved, but the manufacturing cost increases
Solution Approach 1:
The sensing assembly uses cost-effective electromagnetic radiation sources and detectors that can be integrated into the device at reasonable cost. The system is designed to work with disposable aerosol-forming articles, where the sensing components are reused while the articles are discarded, amortizing the sensing cost over many uses.
3Ease of operation
If the device uses controlled heating without accurate substrate identification, then aerosol generation is simpler, but the user experience deteriorates and device damage may occur
Solution Approach 1:
The sensing assembly provides real-time feedback about substrate properties (moisture content, material type) to the heating control system. This feedback enables dynamic adjustment of heating parameters to match the specific substrate conditions, preventing overheating, ensuring consistent aerosol quality, and extending device life.
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 device effectively determines the presence and type of aerosol-forming substrates, ensuring optimal heating and consistent aerosol production, while preventing damage and counterfeiting, thereby enhancing user experience and device longevity.
Implementation Method 1
The emitter may be configured to emit electromagnetic radiation into the cavity
Implementation Method 2
The receiver may comprise a sensor. The sensor may be configured to measure at least one wavelength of the received electromagnetic radiation
Implementation Method 3
The sensor may be configured to measure an intensity of the at least one wavelength of electromagnetic radiation
Implementation Method 4
measuring absorption, reflection, or transmission at various wavelengths
Data Source
AI summary
An aerosol-generating device for generating aerosol from an aerosol-forming substrate is provided, the device including: a housing defining a cavity configured to at least partially receive the substrate; and a sensing assembly including an emitter configured to emit electromagnetic radiation into the cavity, a receiver configured to receive electromagnetic radiation from the cavity, the receiver including a sensor configured to measure at least one wavelength of the received radiation, and a shield extern to the cavity such that the receiver is between the shield and the cavity, the shield being configured to block electromagnetic radiation, first and second portions of the shield being planar, the first and the second portions being non-co-planar, an angle between a normal of respective planes of the first and the second portions being substantially the same as an angle between the receiver and the emitter, and the receiver and the emitter being non-parallel.