Vehicle Sobriety Interlock with Dynamic Retest Timing
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Solution Overview
Problem
Sobriety testing systems require drivers to remain in the vehicle during the warm-up or cooling process, which can take several minutes, especially in extreme weather conditions, and retest protocols often necessitate drivers to stay inside, even if the passenger compartment is not at a comfortable temperature, posing discomfort for drivers and passengers, especially those with children or the elderly.
Innovation Solution
A vehicle sobriety interlock system that allows a driver to start the engine and delay retesting for a predetermined period if the vehicle remains stationary, enabling the environmental control systems to warm or cool the passenger compartment to a comfortable level before re-engaging the transmission or initiating vehicle motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driver is required to remain in the vehicle during the warm-up or cooling process to comply with retesting protocols, then the sobriety monitoring reliability is maintained, but the driver and passengers experience discomfort due to extreme temperatures in the passenger compartment
Solution Approach 1:
The retesting protocol is made dynamic by adjusting the retest timing based on vehicle operation state. When the vehicle remains stationary during warm-up or cooling, the retest is delayed. When the vehicle begins to move, the retest protocol is activated. This dynamic adjustment allows drivers to leave the vehicle during temperature adjustment while maintaining sobriety monitoring when the vehicle is in operation.
Solution Approach 2:
The system performs preliminary sobriety testing before allowing the vehicle to start and warm-up. By conducting the initial test and then delaying subsequent retests until the vehicle is in motion, the system ensures driver sobriety is verified before the critical driving phase while allowing comfort during the stationary warm-up period.
2Object-affected harmful factors
If the driver is allowed to leave the vehicle during the warm-up process, then driver and passenger comfort is improved, but the risk of intoxicated driver circumvention increases
Solution Approach 1:
The retesting protocol transitions from a static fixed-time approach to a dynamic state-based approach. The system monitors vehicle motion sensors to determine when the vehicle is in motion, and only then triggers the retest. This dynamic approach maintains security by testing during actual driving conditions while allowing flexibility during stationary warm-up periods.
Solution Approach 2:
The system uses feedback from vehicle motion sensors to control the timing of retests. When motion is detected, the system triggers the retest protocol. This feedback mechanism ensures that sobriety is verified at the appropriate moment (when driving begins) while allowing drivers to leave the vehicle during stationary periods for comfort.
Data Source
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AI summary
A vehicle sobriety interlock system including a sobriety testing apparatus for testing a driver of a vehicle for intoxication and an interlock system responsive to test results from the sobriety testing apparatus for controlling ignition of an engine of the vehicle. The interlock system, in response to a test result indicating that the driver is sober, allows the driver to start the engine of the vehicle. During a vehicle warm-up time period of a predetermined length following start of the engine and before a transmission of the vehicle has been engaged for putting the vehicle in motion, the interlock system delays a retest of the driver with the sobriety testing system for intoxication.