Wireless Ignition Interlock Using Smartphone Impairment Tests
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Solution Overview
Problem
Existing ignition interlock devices (IIDs) are complex and expensive to install, require trained technicians, and primarily detect alcohol impairment, failing to address broader driver impairment beyond alcohol levels.
Innovation Solution
A system comprising a mobile application on a portable device and a hardware component integrated into the vehicle's wiring, which uses interactive interfaces and reaction time measurements to assess driver impairment, and a smart fuse that prevents the vehicle from starting if impairment is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an ignition interlock device is installed to prevent impaired driving, then driver safety is improved, but device complexity and installation cost increase
Solution Approach 1:
The patent uses a portable communication device (smartphone, tablet, or portable computer) as an intermediary to perform impairment testing. This portable device acts as a mediator between the driver and the vehicle's starting system, eliminating the need for complex hardwired installations while maintaining safety functionality. The portable device runs an application that conducts various impairment tests and communicates the results to control the vehicle's starting capability.
Solution Approach 2:
The patent replaces traditional mechanical and electrical wiring systems with wireless communication technology. Instead of hardwiring the interlock device into the vehicle's electrical system, the invention uses wireless communication protocols to transmit impairment test results and control signals, significantly simplifying installation and reducing device complexity.
2Measurement precision
If a traditional ignition interlock device is used, then alcohol detection is achieved, but detection of other impairment factors is limited
Solution Approach 1:
The patent implements a multi-functional impairment testing system that can detect various types of impairment beyond just alcohol. The portable communication device application conducts multiple types of tests including dexterity tests, reaction time tests, visual acuity tests, and cognitive function tests. This universal testing approach allows the system to adapt to different impairment conditions (alcohol, drugs, fatigue, medical conditions) while maintaining precise measurement capabilities through multiple independent test modalities.
3Reliability
If complex interlock devices are installed, then impairment prevention is effective, but ease of operation decreases
Solution Approach 1:
The patent enables the driver to perform impairment tests independently using their own portable communication device. The driver self-administers the tests by interacting with the application on their device, eliminating the need for technicians or external equipment operation. The system provides clear instructions and automatically processes results, making the operation simple and user-friendly while maintaining effective impairment detection.
Data Source
AI summary
A system preventing an impaired driver from starting a vehicle has a mobile application executing on a portable communication device having a display screen, user-operable input elements, a microphone audio input, a speaker and wireless communication circuitry, a hardware component integrated into wiring of the vehicle, the hardware component comprising a normally open switching element operable by wireless signal from the portable communication device, that when open prevents the vehicle from starting, and an interactive interface displayed on the display screen.The interactive interface requests specific action from a candidate driver, records the candidate driver's action, determines if the action indicates the candidate driver is impaired, and if not impaired, signals the hardware component wirelessly to close the normally open switching element for a predetermined time, enabling the candidate driver to start the vehicle.