Breath Analysis Interaction Scheme for Fast Reliable Intoxication Screening

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Solution Overview

Problem

Existing breath analyzing systems in vehicles face challenges with slow response times and reliability, particularly in contactless detection, leading to inconvenient and time-consuming tests for sober drivers, and issues with measurement errors and user cooperation.

Innovation Solution

A breath analysis system with a compliant mode for quick testing and an interactive mode for complex interactions, utilizing existing vehicle equipment like touch screens and sensors to ensure accurate classification, including visual and audio cues, and secondary sensing units to improve user compliance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If contactless detection is used to simplify the testing process, then ease of operation is improved, but measurement precision deteriorates due to low concentration of substances and interference from surrounding air

Engineering Contradiction:

Improvetesting processVSAvoidsubstance concentration detection

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The patent introduces tracer gases (carbon dioxide or water vapor) as intermediary substances that are always present in breath in highly predictable amounts. These tracers serve as mediators to both trigger the analysis of the target substance and facilitate the determination of the target substance concentration value, thereby improving measurement precision in contactless detection mode.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If tracer gases are used to improve measurement precision in contactless detection, then measurement precision is improved, but reliability deteriorates due to difficulty in functioning satisfactorily in real life scenarios

Engineering Contradiction:

Improvetarget substance concentration determinationVSAvoiddetection system performance

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent implements dynamic mode switching between compliant mode and interactive mode based on real-time assessment of measurement quality and user cooperation. The system adapts its operational characteristics dynamically, transitioning from passive contactless detection to active guided detection when measurement precision or reliability falls below acceptable thresholds.

Inventive Principle:

Principle #15Dynamics

3Productivity

If compliant mode is used for fast testing, then productivity is improved, but reliability deteriorates when measurement errors occur

Engineering Contradiction:

Improvetesting speedVSAvoidmeasurement accuracy

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent implements feedback mechanisms where the system continuously monitors measurement quality and classification confidence. When measurement errors are detected or classification confidence is insufficient, the system provides feedback to the user through instructions and warnings, and automatically transitions from compliant mode to interactive mode to obtain better measurements, thereby maintaining reliability while preserving productivity.

Inventive Principle:

Principle #23Feedback

4Reliability

If interactive mode is used to handle measurement errors, then reliability is improved, but loss of time increases due to complex user interactions

Engineering Contradiction:

Improveclassification accuracyVSAvoidtesting duration

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies partial action by implementing a staged approach where the system first attempts classification with minimal user interaction (compliant mode). Only when measurement quality or classification confidence falls below thresholds does the system escalate to full interactive mode with multiple instructions and user actions. This partial/excessive action strategy ensures reliability is improved only when necessary, minimizing time loss.

Inventive Principle:

Principle #16Partial or excessive action

5Measurement precision

If active detection with mouthpiece is used to ensure correct determination, then measurement precision is improved, but ease of operation deteriorates due to substantial time and effort required

Engineering Contradiction:

Improvebreath analysis accuracyVSAvoiduser effort

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The patent implements dynamic operational modes that adapt to user needs and measurement requirements. The system can switch between compliant mode (passive, minimal effort), interactive mode (guided steps), and active detection mode (mouthpiece-based). This dynamic adaptation ensures measurement precision is maintained while minimizing user effort through the use of contactless detection when conditions permit.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12565175B2Method and system for determination and classification of intoxicating substance in a breath sample facilitated by a user interaction scheme

Publication Date: 2026.03.03 AUTOMOTIVE COALITION FOR TRAFFIC SAFETY INC

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.