Roundabout Turn Signal Control Using Route and Position Data
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing route guidance technologies at circular intersections, such as roundabouts, fail to effectively provide directional indications while adhering to the specific rules of roundabouts, which differ from other intersections.
Innovation Solution
A direction indicator control method and device that utilize an electronic control unit, external and internal sensors, GPS, and a navigation system to determine directional indication points and control vehicle exterior and interior direction indicators based on the vehicle's position and the roundabout's layout, inhibiting or initiating directional signals according to the vehicle's movement within the roundabout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional route guidance technology is used at roundabouts, then directional indication is provided, but the indication does not comply with roundabout rules
Solution Approach 1:
The patent applies dynamics by making the direction indicator control adaptive and variable based on real-time vehicle position and roundabout geometry. The control unit dynamically adjusts when to activate indicators based on whether the vehicle is approaching a join point or exit point, rather than using a fixed control pattern. This allows the system to comply with roundabout rules while managing complexity through context-aware adaptation.
Solution Approach 2:
The patent implements feedback by continuously monitoring the vehicle's position relative to the roundabout geometry (join points and exit points) and using this information to adjust the direction indicator control. The control unit receives feedback from position detection and map information, then modifies the indicator activation timing accordingly, ensuring rule compliance while maintaining manageable system complexity through intelligent control logic.
2Measurement precision
If direction indicators are activated early at roundabouts, then directional information is provided in advance, but incorrect signaling may occur
Solution Approach 1:
The patent applies preliminary action by preparing the direction indicator control in advance based on predicted vehicle position relative to join points and exit points. The control unit determines ahead of time when indicators should be activated based on map information and current position, allowing precise timing without premature activation. This ensures directional information is provided at the correct moment without causing incorrect signaling.
3Adaptability or versatility
If direction indicators follow conventional intersection rules, then standard signaling is provided, but roundabout-specific rules are not followed
Solution Approach 1:
The patent applies local quality by implementing different control logic specifically for roundabout scenarios versus conventional intersections. The control unit identifies when the vehicle is at a roundabout based on map information and applies specialized control rules for join points and exit points, rather than using generic intersection logic. This provides adaptability to roundabout rules while keeping the overall system simple through targeted local modifications.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A direction indicator control unit (12) inhibits direction indicators (7A, 7B) of a host vehicle from making a directional indication when the host vehicle enters a roundabout determined to be present along a presumed traveling route on which the host vehicle is presumed to travel.