Vehicle Control Zone Setting via Broken Line Detection
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Solution Overview
Problem
Existing vehicle control systems struggle to accurately set control zones for driving assist control on entrance and exit ramps connected to main roads with different safe cruising speed limits, due to inaccuracies in road information and vehicle position detection.
Innovation Solution
A vehicle control apparatus that uses broken line detecting means, such as an imaging system, to determine control zones based on the detection of road markings, allowing for precise identification of zone boundaries and initiating or ending assist control accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If road information and host vehicle position are used to detect connecting roads and set control zones, then the control system can operate automatically, but the positional accuracy deteriorates due to errors in road information and position detection
Solution Approach 1:
The patent introduces a broken line detection result as an intermediary element between the road information/position detection system and the control zone setting. The broken line, which is a visible road marking, serves as a mediator to accurately determine the control zone position without relying directly on error-prone GPS position data or map information. The control ECU uses the detected broken line position as a reference point to set the control zone, thereby eliminating the accumulation of errors from multiple detection sources.
2Reliability
If multiple detection methods (road information, position detection) are combined to improve reliability, then system coverage is improved, but measurement accuracy deteriorates due to error accumulation
Solution Approach 1:
The patent extracts the broken line detection function as a separate, dedicated detection mechanism from the overall position detection system. Instead of relying on the integrated but error-prone combination of GPS and map matching, the system extracts and uses only the broken line visual detection result for determining control zone boundaries. This extraction approach isolates the critical positioning function from sources of error, achieving both reliability through dedicated detection and precision by eliminating error accumulation from multiple detection methods.
Data Source
AI summary
A vehicle control apparatus that performs driving assist control on an entrance ramp or an exit ramp connected to a main road having a different safe cruising speed limit than the entrance ramp or the exit ramp. The control apparatus includes a broken line detecting device that detects a broken line marked on the road and divides the main road and the entrance ramp or the exit ramp and a controller that determines a control zone of the driving assist control based on the broken line detection results from the broken line detecting device. For example, the vehicle control apparatus detects the broken line that divides a main road and an exit ramp using the broken line detecting device and starts driving assist control using the controller when it is detected that an accelerator pedal has been released.