Alcohol Detection via Pulse Wave Frequency Fluctuation Analysis

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current alcohol-drinking detection systems using breath analysis can be deceived by a fellow passenger's breath, and existing methods for detecting alcohol consumption through pulse waves lack accuracy.

Innovation Solution

An alcohol-drinking detecting system that utilizes an air-pack sensor to analyze air pressure fluctuations, employing frequency dynamic information processing and dominant frequency analysis to determine the presence of alcohol by comparing time-series fluctuations with non-drinking state tendencies.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If breath analysis is used for alcohol detection, then the detection method is simple and widely applicable, but the system can be deceived by a fellow passenger's breath

Engineering Contradiction:

Improvedetection method applicabilityVSAvoidalcohol detection accuracy

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent extracts the harmful factor (fellow passenger's breath) from the detection target by shifting from breath analysis to pulse wave analysis. The pulse wave sensor detects only the driver's physiological signals through contact with the driver's body, eliminating the possibility of deception by other passengers' breath.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces an intermediary (pulse wave signal) between the alcohol consumption and detection. Instead of directly detecting breath alcohol, the system detects changes in pulse wave characteristics caused by alcohol's effect on the cardiovascular system, providing indirect but more reliable evidence of alcohol consumption.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If pulse wave analysis is used for alcohol detection, then the detection targets only the driver, but the existing methods lack accuracy in determining alcohol consumption

Engineering Contradiction:

Improvedriver-specific detectionVSAvoidalcohol consumption detection accuracy

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The patent applies dynamic analysis by examining changes in pulse wave characteristics over time rather than static measurements. The system analyzes the temporal evolution of pulse wave parameters to detect alcohol-induced physiological changes, improving measurement precision through time-series analysis.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent detects alcohol consumption by monitoring changes in pulse wave parameters (amplitude, frequency, waveform shape) rather than relying on a single fixed threshold. The system identifies alcohol effects through characteristic changes in multiple pulse wave parameters, enhancing detection accuracy.

Inventive Principle:

Principle #35Parameter changes

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 provides a more accurate detection of alcohol consumption by analyzing frequency fluctuations in air-pack sensor data, enhancing the reliability of alcohol-drinking state determination.

Implementation Method 1

a sensor which detects an air pressure fluctuation in an air pack

Methodology Applied

Scientific EffectPressure detection:

Implementation Method 2

a frequency dynamic information processing means which obtains, from a time-series waveform of the biological signal, a time-series fluctuation regarding the frequency of the time series-waveform

Methodology Applied

Scientific EffectFrequency analysis:

Data Source

PatentUS9149231B2Alcohol-drinking detecting system and computer program

Publication Date: 2015.10.06 DELTA TOOLING CO LTD

AI summary

Determination about presence/absence of alcohol in the body is made accurately.A frequency dynamic information processing means 610 which obtains a tendency of time-series fluctuation regarding a frequency of a pulse wave of a back portion of a person detected by an air pack and an alcohol-drinking determining means 650 which determines an alcohol-drinking state when a tendency of a time-series fluctuation regarding the frequency obtained by the frequency dynamic information processing means 610 is separated from a tendency of time-series fluctuation regarding the frequency at a non-drinking state are provided. Since determination about whether or not a person is in an alcohol-drinking state is made according to comparison with time-series fluctuation regarding the frequency at a non-drinking time, where the determination is made using not only frequency analysis of the frequency of a pulse wave changing according to the physical condition of the person but also the time-series fluctuation thereof, determination about presence/absence of alcohol drinking can be made more accurately as compared with the conventional method.