Vehicle Control Offset Erasure for Adaptive Cruise Accuracy
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Solution Overview
Problem
Existing vehicle control apparatuses face challenges in maintaining accurate inter-vehicle distance control when targets on a preceding vehicle change positions unexpectedly, leading to incorrect implementation of adaptive cruise control.
Innovation Solution
A vehicle control apparatus that calculates and stores an offset between detected distances to multiple targets on a preceding vehicle, allowing it to adjust inter-vehicle distance control based on the detected distance to the rear-end target and erase offsets if targets are determined to belong to different vehicles, ensuring proper adaptive cruise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system stores an offset between multiple targets to maintain inter-vehicle distance control when the rear-end target is not detected, then the continuity of adaptive cruise control is improved, but the system may incorrectly recognize targets from different vehicles as belonging to the same vehicle, leading to control errors
Solution Approach 1:
The system continuously monitors the relative displacement between the first and second targets and uses this feedback to determine whether they belong to the same vehicle. When the displacement exceeds a threshold, the system erases the stored offset, preventing incorrect recognition. This feedback mechanism maintains control continuity while ensuring accurate target identification.
Solution Approach 2:
The offset storage is not static but dynamically managed based on real-time target displacement detection. The system adapts by erasing stored offsets when targets are determined to belong to different vehicles, allowing the inter-vehicle distance control to switch between using stored offsets and direct target detection based on current conditions.
2Productivity
If the system uses detected distance to the first target and stored offset to calculate distance to the second target when the rear-end target is not detected, then the inter-vehicle distance control can continue, but the control accuracy deteriorates due to target displacement uncertainties
Solution Approach 1:
The system uses feedback from relative displacement detection to determine when to trust the stored offset for distance calculation. When displacement is within acceptable thresholds, the offset is used to maintain control continuity. When displacement exceeds thresholds indicating different vehicles, the system stops using the offset, ensuring distance measurement accuracy is maintained.
3Measurement precision
If the system erases the stored offset when targets are determined to belong to different vehicles, then the accuracy of vehicle identification is improved, but the complexity of the system increases due to additional judgment logic
Solution Approach 1:
The system performs self-verification by monitoring relative displacement between targets and automatically determining whether they belong to the same vehicle. This self-service approach improves identification accuracy through simple displacement threshold comparisons rather than complex external verification systems.
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 continuous and accurate adaptive cruise control by accounting for unexpected target displacements, preventing incorrect recognition of vehicles and maintaining a stable inter-vehicle distance, thus enhancing safety and reducing driver workload during traffic jams.
Implementation Method 1
The radar device is configured to transmit radar waves to a front of the subject vehicle and receive reflected waves from targets
Data Source
AI summary
A vehicle control apparatus for implementing inter-vehicle distance control of a vehicle carrying the apparatus behind a preceding vehicle. In the apparatus, an offset storage is configured to calculate an offset that is a difference between detected distances to first and second targets, and store the offset associated with the first target forward of the second target. The inter-vehicle distance control may be implemented based on a distance calculated by subtracting the offset from the detected distance to the first target. An offset eraser is configured to, based on the presence or absence of relative displacement between the first and second targets, determine whether or not the first and second targets belong to different vehicles, and when the first and second targets belong to different vehicles, erase the offset stored by the offset storage.