Automated E-Cigarette Testing with Optical Aerosol Analysis
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Solution Overview
Problem
Current methods for testing electronic smoking devices are labor-intensive and time-consuming, as they require manual measurement of weight loss after each puff, making it impossible to determine precise aerosol delivery uniformity and reproducibility.
Innovation Solution
An automatic transport and weighing system combined with an optical measurement device that repeatedly measures the mass of the device during smoking, allowing for quasi-continuous monitoring and precise determination of mass changes with each puff, while correlating optical properties of the aerosol with mass loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual weight measurement is used after each puff, then measurement precision can be maintained, but the testing process becomes extremely time-consuming and labor-intensive
Solution Approach 1:
The patent replaces manual mechanical weighing operations with an automated system that uses a smoke machine integrated with a precision scale. The system automatically measures weight before and after puffing sequences, eliminating manual intervention while maintaining measurement precision. This substitution of manual mechanical operations with an automated mechanical system resolves the contradiction between measurement precision and testing time.
Solution Approach 2:
The automated testing system performs self-service by automatically conducting multiple puff sequences, recording weight changes, and calculating aerosol delivery metrics without requiring operator intervention for each measurement. The system autonomously manages the testing workflow, including positioning the device, executing puffs, and processing data, thereby dramatically reducing both time and labor requirements while preserving measurement accuracy.
2Productivity
If weight is measured after blocks of puffs (10, 25, or 50 puffs), then productivity increases, but measurement precision of individual puff aerosol delivery is lost
Solution Approach 1:
The patent segments the testing process into individual puff measurements rather than measuring in large blocks. The automated system is capable of performing rapid sequential measurements after each individual puff or small sequences of puffs, breaking down the continuous testing process into discrete measurable units. This segmentation allows both high productivity through automation and precise measurement of individual puff aerosol delivery characteristics.
Solution Approach 2:
The system maintains continuous measurement action by automatically performing rapid sequential weighings throughout the testing process. Rather than stopping to measure in discrete blocks, the automated system continuously monitors weight changes during the entire puffing sequence, enabling both high throughput and precise detection of variations in individual puff aerosol delivery through uninterrupted data collection.
3Device complexity
If manual operation is used for weighing, then device complexity remains low, but reliability of results decreases due to human variation
Solution Approach 1:
The patent replaces manual human operations with an automated mechanical testing system that consistently executes the same measurement protocol without variation. The smoke machine integrated with the precision scale and computer control eliminates human factors such as reaction time differences, positioning inconsistencies, and recording errors. This substitution increases system complexity but dramatically improves reliability and reproducibility of testing results through consistent automated execution.
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
Enables precise and reproducible testing of electronic smoking devices by automatically measuring mass changes with each puff, providing detailed insights into aerosol density and particle distribution, improving the evaluation of aerosol delivery uniformity and efficiency.
Implementation Method 1
an optical measurement device, in which optical properties (i.e., at least one optical property) of aerosol deriving from the electronic smoking device are measured
Implementation Method 2
an optical measurement device, in which optical properties (i.e., at least one optical property) of aerosol deriving from the electronic smoking device are measured
Implementation Method 3
The actual mass of the electronic smoking device may be repeatedly determined by means of an automatic transport and weighing system, wherein the electronic smoking device is removed from the inlet port after the inhalation period of a puff has ended, is transported to a precision balance, is weighed by means of the precision balance
Data Source
Figure 1~2
Figure 3
AI summary
In a process of testing an electronic smoking device, in particular an electronic cigarette, process of testing an electronic smoking device, an electronic smoking device (2) to be tested is mounted at an inlet port (12) of a testing apparatus (20; 10). Puffs are exerted at the electronic smoking device (2), using the testing apparatus, each puff being defined by a puff sequence comprising an inhalation period and an exhalation period. At least one optical property of aerosol (22) deriving from the electronic smoking device (2) is measured in an optical measurement device (20), which is part of the testing apparatus. The optical measurement device (20) comprises a light source (24), preferably a laser or an LED source, and at least one detector (28) arranged for measuring the scattering of light emitted from the light source (24) and passing through the aerosol (22). Said detector (28) is arranged at a scattering angle with respect to a straight light path from the light source (24). The scattering angle is preferably in the range of from 60° to 120°, and, as an optical property, a signal at said detector (28) is determined.