Blind-Area Travel Control Using Relative Speed and Elapsed Time
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Solution Overview
Problem
Existing technologies fail to determine early whether blind area avoidance control for a host vehicle is necessary, leading to potential unnecessary speed adjustments and driver discomfort.
Innovation Solution
A travel control device that utilizes nearby vehicle information and surrounding road environment data to perform blind area avoidance control based on relative speed, elapsed time, and positional criteria, determining when such control is not needed to prevent unnecessary adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blind area avoidance control is performed based on continuous detection exceeding a predetermined threshold value, then the host vehicle can avoid traveling in the blind area of the adjacent vehicle, but it is not possible to determine early that there is no need to perform blind area avoidance control
Solution Approach 1:
The system performs preliminary assessment of blind area avoidance necessity using multiple criteria (detection position, relative speed, elapsed time) before committing to control action. This allows early determination that control is not needed, avoiding unnecessary waiting for threshold-based continuous detection
Solution Approach 2:
The system changes from using a single threshold-based time parameter to multiple parameters including detection position, relative speed, and elapsed time. This multi-parameter approach enables more nuanced and timely determination of when blind area avoidance control is necessary
2Reliability
If blind area avoidance control is performed by waiting for continuous detection threshold, then control reliability is ensured, but unnecessary speed adjustments occur when control is not actually needed
Solution Approach 1:
The system applies different control strategies based on local conditions - when the host vehicle is in the blind area with specific relative speed and time conditions, control is applied; otherwise, control is avoided. This localized approach ensures control reliability when needed while maintaining driver comfort when unnecessary
Solution Approach 2:
Instead of always waiting for continuous detection threshold which may cause excessive action, the system uses partial action by assessing multiple parameters simultaneously. This allows determining control necessity earlier and avoiding excessive speed adjustments that would degrade driver comfort
Data Source
AI summary
A travel control device performs blind area avoidance control when a host vehicle is in a blind area, a relative speed which is a value obtained by subtracting a speed of the host vehicle from a speed of an adjacent vehicle is larger than a first relative speed threshold value, the relative speed is smaller than a second relative speed threshold value, and an elapsed time from the point of time the host vehicle entered the blind area is an elapsed time threshold value or more and does not perform the blind area avoidance control when the host vehicle is not in the blind area, when the relative speed is the first relative speed threshold value or less, when the relative speed is the second relative speed threshold value or more, or when the elapsed time is shorter than the elapsed time threshold value.