Intersection Start Judgment Device for 4-Way Stop Priority
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Solution Overview
Problem
Existing vehicle control systems, such as course prediction devices, cannot effectively manage vehicle start priorities at '4-WAY STOP' intersections where vehicles from all directions need to temporarily stop, as they lack the capability to assess and enforce the traffic rule that prioritizes vehicles based on arrival time.
Innovation Solution
An intersection start judgment device equipped with an autonomous sensor, a driving environment recognizer, a locator, and a controller, which uses stereo cameras and a Global Navigation Satellite System to detect and recognize the driving environment, calculate the vehicle's location, and grant start permission when no other vehicles are stopping at the intersection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing course prediction devices are used, then vehicle movement prediction is possible, but start priority judgment at 4-WAY STOP intersections cannot be performed
Solution Approach 1:
The system segments the intersection environment into multiple detection zones (front, left, right, rear) and assigns specific monitoring functions to each zone. This allows the system to track vehicles from different directions independently and determine start priority based on arrival time at each zone, enabling accurate 4-WAY STOP rule enforcement that general course prediction devices cannot provide.
Solution Approach 2:
The patent introduces an intermediary judgment mechanism that mediates between raw sensor data and control actions. The judgment device acts as an intermediary layer that processes arrival time data from multiple vehicles, applies 4-WAY STOP rules, and generates start permission signals, thereby enabling reliable start priority judgment that bridges the gap between basic course prediction and traffic rule enforcement.
2Measurement precision
If subtraction counting method is used to track stopping vehicles, then start permission can be accurately determined, but system complexity increases
Solution Approach 1:
The judgment device performs multiple functions using a unified subtraction counting mechanism: it tracks the number of stopping vehicles, determines when the count reaches zero, generates start permission signals, and resets for the next cycle. This multi-functional approach achieves precise vehicle count measurement without requiring separate complex systems for each function, thereby maintaining relatively simple device architecture while ensuring accurate start priority judgment.
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
Enables accurate judgment and enforcement of start priorities at '4-WAY STOP' intersections, ensuring safe and orderly vehicle movement by determining when it is safe for a vehicle to proceed based on the presence and status of other vehicles.
Implementation Method 1
an autonomous sensor disposed on the own vehicle and configured to detect a driving environment in front of the own vehicle
Implementation Method 2
a global navigation satellite system; and a locator configured to calculate a location of the own vehicle with map information and the global navigation satellite system
Data Source
AI summary
An intersection start judgment device judges whether to start an own vehicle at an intersection at which vehicles in all directions need to temporarily stop. The device includes an autonomous sensor, a driving environment recognizer, a locator, and a controller. The autonomous sensor is disposed on the own vehicle and configured to detect a driving environment in front of the own vehicle. The driving environment recognizer is configured to recognize, with the autonomous sensor, the driving environment of the own vehicle. The locator is configured to calculate a location of the own vehicle with map information and a global navigation satellite system; and a controller configured to give, in a case where the own vehicle stopped temporarily at the intersection, start permission to the own vehicle when the number, counted by the driving environment recognizer, of other vehicles that are already stopping at the intersection becomes zero by subtraction counting.