Self-Calibrating Breathalyzer with Driver Verification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing breath alcohol ignition interlock devices face challenges in preventing circumvention attempts, such as imposter fraud, tampering, and the need for frequent calibration, which is costly and inconvenient.
Innovation Solution
A self-calibrating breath alcohol ignition interlock device equipped with a miniaturized fuel cell, dual image recorders to verify the driver's identity, accelerometers to detect tampering, and a wireless link for secure communication, along with a relay box that connects to the vehicle's electrical system to prevent operation if an acceptable breath sample is not provided.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional breathalyzers are combined with ignition locking system, then intoxicated drivers are prevented from starting vehicles, but the device can be circumvented by imposters providing breath samples
Solution Approach 1:
The system continuously monitors breath alcohol content at random intervals after engine start and provides immediate feedback through warnings and logging when violations occur, creating a closed-loop control system that deters imposter fraud through active monitoring rather than single-point verification
Solution Approach 2:
The device requires breath samples to be provided at predetermined intervals after engine start, establishing a proactive verification schedule that prevents imposters from maintaining control of the vehicle without periodic detection
2Measurement precision
If periodic calibration is performed using pressurized alcohol/gas mixture or Guth bath, then sensor accuracy is maintained, but cost and inconvenience increase significantly
Solution Approach 1:
The system performs automatic self-calibration using an integrated Guth bath that contains known standard alcohol solution, allowing the device to maintain its own accuracy without requiring external calibration services, thereby eliminating the monthly $100 calibration cost and user inconvenience
Solution Approach 2:
The calibration system is merged into the main device body, combining the sensor, fuel cell, and calibration standards into a single integrated unit that can self-test and self-calibrate without separation into handheld and relay box components
3Adaptability or versatility
If handheld component and relay box are separated, then device functionality is distributed, but opportunities for tampering and destruction increase
Solution Approach 1:
The system merges the handheld breathalyzer component and the relay box into a single integrated device, eliminating the wireless communication interface that could be exploited for tampering and reducing the number of separate components that can be individually targeted for destruction
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 device effectively prevents circumvention attempts by ensuring accurate calibration without manual intervention, verifying the driver's identity, and securely communicating tampering events, thereby enhancing the reliability and convenience of the interlock system.
Implementation Method 1
a fuel cell to contain the electrochemical reaction and response after gathering the initial breath data
Implementation Method 2
Modern ignition interlock devices use an ethanol specific fuel cell for a sensor. A fuel cell is an electrochemical device in which alcohol undergoes a chemical oxidation reaction at a catalytic electrode surface (often platinum) to generate an electrical current.
Data Source
AI summary
The invention relates to an improvement in a breath alcohol test devices includes within the handheld unit containing a fuel cell, a miniaturized self calibrating test device thereby avoiding the need for 30, 60 and 90 day calibration testing. It also relates to various tamper or circumvention improvements that may be used alone or in combination with the self calibration improvement, including cameras to record a driver providing a breath sample and to verify the location of the driver within a vehicle.