Vehicle Entry Direction Determination for Accurate Geofence Notifications
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Solution Overview
Problem
Existing vehicle management systems struggle to accurately output information to vehicles traveling on specific roads with different passage directions, particularly in areas where the geofence size is small or when vehicles pass through the geofence during data acquisition intervals, leading to missed notifications.
Innovation Solution
A vehicle management device with an entry direction determination unit that assesses whether a vehicle's entry direction into a designated region matches a predetermined direction, allowing for targeted notification information output based on this assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the geofence size is reduced to improve notification precision, then the notification accuracy improves, but the reliability of notification decreases because vehicles may pass through during data acquisition intervals
Solution Approach 1:
The patent divides the notification determination into two independent stages: geofence entry detection and passage direction verification. This segmentation allows the system to maintain a small geofence for precision while adding a directional check to ensure reliability, preventing missed notifications when vehicles pass through quickly.
Solution Approach 2:
The system performs preliminary action by recording the entry direction of vehicles when they first enter the geofence. This pre-recorded directional information is then used to verify whether the vehicle is traveling in the correct direction, ensuring reliable notification even for vehicles that move quickly through the small geofence area.
2Reliability
If the geofence size is increased to improve notification reliability, then the notification reliability improves, but the notification precision deteriorates because it cannot distinguish between vehicles on different roads with different passage directions
Solution Approach 1:
The patent segments the notification determination process into two independent verification stages: geofence entry detection and passage direction matching. This allows the use of a small, precise geofence while adding directional verification to ensure reliability, avoiding the need to enlarge the geofence which would reduce precision.
Solution Approach 2:
The passage direction information acts as an intermediary criterion between the geofence detection and the final notification decision. By introducing this intermediate verification step, the system can maintain a small geofence for precision while ensuring reliable notifications through directional confirmation.
3Adaptability or versatility
If passage direction determination is added to improve notification selectivity, then the notification selectivity improves, but the device complexity increases
Solution Approach 1:
The patent makes the notification system multi-functional by enabling it to perform both basic geofence entry detection and directional verification using the same hardware components. The communication device can universally handle both types of determination, increasing selectivity without requiring separate specialized hardware for each function.
Solution Approach 2:
The notification determination device uses its own recorded entry direction information to perform self-verification. By comparing the current vehicle direction against the pre-recorded entry direction, the system performs directional verification autonomously without requiring external reference systems, thereby increasing selectivity while minimizing additional complexity.
Data Source
AI summary
An entry direction determination unit determines whether or not an entry direction of a vehicle into an output determination region is a predetermined direction in a case where the vehicle is located in a predetermined region or at a predetermined point. An output unit determines whether or not predetermined information is to be output on the basis of whether or not the entry direction is the predetermined direction.