Navigation System Lost Vehicle Detection
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Solution Overview
Problem
Existing navigation systems inaccurately determine when a vehicle has reached its destination, leading to unnecessary route guidance restarts, as they fail to distinguish between a vehicle that has arrived and one that is still en route to a large facility or parking lot.
Innovation Solution
A navigation system that determines whether a vehicle is lost by monitoring its movement pattern after route guidance ends, specifically looking for movements away from and back towards the destination point within predetermined distances, and adjusts these distances based on traffic restrictions and facility types to reduce erroneous determinations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the navigation system restarts route guidance when a vehicle travels for a predetermined time after reaching the destination, then the system can detect lost vehicles, but it causes unnecessary route guidance restarts when vehicles are queuing or searching for parking
Solution Approach 1:
The navigation system dynamically adjusts the lost vehicle determination threshold based on the type of destination. For large facilities with extensive parking areas, the threshold is extended beyond the standard predetermined time, allowing vehicles to remain in queue or search for parking without triggering false lost detection. This dynamic adaptation resolves the contradiction by making the system both reliable in detecting actual lost vehicles and convenient for drivers at large facilities.
Solution Approach 2:
The system changes the time parameter for lost vehicle determination based on destination characteristics. Instead of using a fixed predetermined time for all destinations, the determination threshold is modified according to whether the destination is a large facility, shopping center, or other location with extended parking needs. This parameter change enables accurate lost detection while avoiding unnecessary route guidance restarts.
2Ease of operation
If the navigation system uses a fixed predetermined time to determine lost vehicles, then the system is simple to operate, but it cannot accurately distinguish between vehicles that have arrived and those still en route to large facilities
Solution Approach 1:
The system modifies the time parameter for lost vehicle determination based on destination type. For large facilities with extensive parking areas, the determination threshold is extended beyond the standard predetermined time. This parameter change maintains operational simplicity while significantly improving measurement precision in distinguishing between arrived and en-route vehicles.
Solution Approach 2:
The lost determination mechanism transitions from a static fixed-time approach to a dynamic adaptive approach. The system automatically adjusts the determination threshold based on destination characteristics, maintaining ease of operation while achieving accurate distinction between vehicles that have arrived and those still searching for parking at large facilities.
Data Source
AI summary
A navigation system which performs route guidance from a vehicle departure location to a target location. After a vehicle has arrived at the target location and completed the route guidance, if the vehicle has moved away from the target location and thereafter has approached the target location again, the navigation system: determines that the vehicle is disorientated and unable to arrive at the target location; and resumes the route guidance.