Breath Alcohol Detection With Tracer-Guided Interactive Sampling
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Solution Overview
Problem
Current breath analyzing systems in vehicles face challenges with slow and unreliable contactless detection methods, particularly in real-life scenarios, leading to prolonged response times and increased use of disposable plastic mouthpieces, which are environmentally questionable and inconvenient for sober drivers.
Innovation Solution
A breath analysis system and method that employs a compliant mode for fast and convenient detection for sober drivers, shifting to an interactive mode when necessary, using a combination of breath measurement units, secondary sensing units, and interaction units to issue instructions and update action compliance values, thereby reducing classification time and minimizing manual operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If contactless detection is used to avoid disposable mouthpieces, then environmental friendliness and convenience are improved, but the detection time becomes too long and reliability decreases
Solution Approach 1:
The system dynamically adapts the detection procedure based on real-time conditions. It switches between compliant mode (fast, minimal user action) and interactive mode (slower, more instructions) depending on whether the driver is sober or intoxicated, optimizing both speed and accuracy for each scenario
Solution Approach 2:
The system performs preliminary analysis of breath samples to quickly determine if further analysis is needed. Tracer gas analysis is performed first to trigger or cancel the target substance analysis, reducing overall detection time by avoiding unnecessary lengthy procedures for sober drivers
2Loss of substance
If contactless detection is used to eliminate disposable plastic mouthpieces, then environmental impact is reduced, but measurement reliability and accuracy deteriorate
Solution Approach 1:
The system uses tracer gases (CO2, water vapor) as intermediary substances that are always present in breath in predictable amounts. These tracers serve as reliable indicators to trigger analysis and facilitate determination of target substance concentration, compensating for the lower concentration issues in contactless detection
Solution Approach 2:
The system continuously monitors tracer gas concentrations and uses this feedback to adjust the detection process. The tracer analysis results feed into the decision to proceed with target substance analysis, ensuring reliable detection by adapting to actual breath conditions in real-time
3Measurement precision
If active detection with mouthpiece is used to ensure correct determination, then measurement accuracy is improved, but user effort and time required increase substantially
Solution Approach 1:
The system dynamically adapts the detection procedure based on real-time conditions. It switches between compliant mode (fast, minimal user action) and interactive mode (slower, more instructions) depending on whether the driver is sober or intoxicated, optimizing both speed and accuracy for each scenario
Solution Approach 2:
The system performs preliminary analysis of breath samples to quickly determine if further analysis is needed. Tracer gas analysis is performed first to trigger or cancel the target substance analysis, reducing overall detection time by avoiding unnecessary lengthy procedures for sober drivers
4Reliability
If tracer gases are used to facilitate contactless detection, then detection capability is improved, but response time becomes too slow for practical use
Solution Approach 1:
The system performs preliminary analysis of breath samples to quickly determine if further analysis is needed. Tracer gas analysis is performed first to trigger or cancel the target substance analysis, reducing overall detection time by avoiding unnecessary lengthy procedures for sober drivers
Solution Approach 2:
The system dynamically adapts the detection procedure based on real-time conditions. It switches between compliant mode (fast, minimal user action) and interactive mode (slower, more instructions) depending on whether the driver is sober or intoxicated, optimizing both speed and accuracy for each scenario
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 system significantly reduces the time for reliable classification, is more convenient for sober drivers, and reduces the complexity and time required for analysis, utilizing existing vehicle equipment like touch screens and voice recognition systems, while providing warnings and increasing interaction complexity only when needed.
Implementation Method 1
a breath measurement unit arranged to sample signals representing a local concentration of an intoxicating substance
Data Source
Figure 1a
Figure 1b
Figure 2
AI summary
The present invention relates to a breath analyzing system and method. In particular the invention relates to a breath analyzing system and method arranged to provide tracer-aided determination and classification of the presence of a breath intoxicating substance facilitated by a user interaction scheme. If a determination may not be performed within a first compliant mode of operation an interactive mode is initiated wherein the user is stepwise instructed to perform actions that facilitate the classification. An action compliance value, representing how well the user follows issued actions/instructions, is determined and used to select actions.