Adaptive Permeation Testing Instrument Protocol
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Solution Overview
Problem
Permeation instruments used to measure analyte transmission rates through samples, such as oxygen, carbon dioxide, or water vapor, require lengthy testing periods due to rigorous protocols including periodic sensing and rezeroing, which increases testing time without ensuring accuracy, especially when dealing with superior analyte barriers and low analyte concentrations.
Innovation Solution
A computer-controlled permeation testing instrument that adapts sensing periods, rezero frequencies, and individual zero procedures based on previous transmission rate measurements, allowing for more efficient testing without compromising accuracy by dynamically adjusting parameters such as sensing periods, rezero frequencies, and the necessity of individual zeros based on predetermined threshold values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If periodic rezeroing and individual zero procedures are performed throughout the permeation testing period, then measurement accuracy is improved, but testing period time increases
Solution Approach 1:
The patent implements dynamic adjustment of rezeroing frequency based on measured transmission rates. When transmission rates are low (indicating good barrier performance), rezeroing frequency is reduced. When transmission rates are high, rezeroing frequency increases. This dynamic protocol adapts to sample characteristics rather than applying a fixed rigorous schedule, resolving the contradiction between maintaining accuracy and reducing testing time.
Solution Approach 2:
The patent changes the parameter of rezeroing frequency based on measured transmission rate values. By monitoring transmission rates during testing and adjusting rezeroing frequency accordingly, the system optimizes the balance between measurement accuracy and testing duration. This parameter adaptation allows the system to perform fewer rezero operations when they are less critical, thereby reducing overall testing time while maintaining necessary accuracy.
2Measurement precision
If sensing period is extended to ensure accurate detection of low analyte concentrations, then measurement accuracy is improved, but testing period time increases
Solution Approach 1:
The patent dynamically adjusts sensing period duration based on the detected analyte concentration levels and transmission rate measurements. When analyte concentrations are low (indicating good barrier performance), the system extends sensing periods to ensure accurate detection. When concentrations are high, sensing periods are shortened. This dynamic adaptation resolves the contradiction by matching sensing effort to actual measurement needs rather than applying a uniformly long sensing period.
3Measurement precision
If rigorous testing protocol with frequent sensing and rezeroing is applied, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The patent implements feedback control where transmission rate measurements obtained during testing are used to adjust subsequent rezeroing frequency and sensing period duration. The system continuously monitors measurement results and uses this feedback to optimize the testing protocol in real-time. This feedback mechanism replaces complex predetermined rigid protocols with adaptive decision-making based on actual sample performance, reducing protocol complexity while maintaining accuracy.
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 adaptive approach significantly reduces testing period times while maintaining measurement accuracy by optimizing sensing periods, rezero frequencies, and eliminating unnecessary individual zeros, thus enhancing the efficiency of permeation testing without sacrificing reliability.
Implementation Method 1
A sensor for the target analyte is placed in fluid communication with the sensing chamber for detecting the presence of target analyte that has migrated into the sensing chamber from the driving chamber through the test film
Implementation Method 2
The flow-through method continuously flushes the sensing chamber with inert carrier gas to transport any target analyte that has migrated into the sensing chamber and deliver it to a remotely located target-analyte sensor
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
A protocol adaptive, computer controlled target-analyte permeation testing instrument, capable of self-adaptive adjustments to measurement interval, rezero frequency and independent zero go-no-go.