Driving Assist Blind Spot Speed Zone Computation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing driving assistance devices cannot accurately compute the speed decrease required for collision avoidance and are influenced by the accuracy of future vehicle position predictions, leading to unnecessary or inadequate assistance, potentially discomforting drivers.
Innovation Solution
A driving assistance device with a blind spot recognition unit, mobile object information setting unit, speed zone computation unit, target speed computation unit, and target speed profile creation unit, which predicts mobile objects, computes collision risk zones, and sets target speeds to ensure safe passage through blind spots, independent of course prediction accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If driving assistance is performed using course prediction results of the host vehicle, then collision avoidance can be achieved, but the accuracy of collision determination becomes low when prediction accuracy is low, leading to unnecessary or inadequate assistance
Solution Approach 1:
The system performs preliminary actions by computing the speed zone and target speed in advance based on mobile object information and blind spot conditions, before the actual collision risk materializes. This allows the driving assistance to be prepared and executed accurately without relying on low-accuracy future course predictions
Solution Approach 2:
The patent introduces an intermediary approach by using mobile object information (assumed speed, position) as a mediator between the host vehicle state and collision determination. Instead of directly predicting the host vehicle's future course, the system uses the mobile object's characteristics to compute the speed zone, thereby avoiding the accumulation of prediction errors
2Ease of operation
If the driving assistance device computes speed decrease and avoidance amount, then appropriate driving assistance can be provided, but the device complexity increases
Solution Approach 1:
The system changes parameters by computing the speed zone based on mobile object information (assumed speed, position) rather than predicting the host vehicle's future course. This parameter transformation simplifies the computation while providing appropriate driving assistance through target speed computation
Data Source
AI summary
A driving assistance device includes; a speed zone computation unit configured to compute a speed zone of the host vehicle having a possibility that the host vehicle will come into contact with the mobile object when progressing in the progressing direction, based on the mobile object information set by the mobile object information setting unit; a target speed computation unit configured to compute a target speed of the host vehicle based on a speed zone; and a target speed profile creation unit configured to create a target speed profile for decelerating the host vehicle from the current speed to the blind spot entry target speed, based on a blind spot entry target speed which is the target speed of the host vehicle at the time of entering a place forming the blind spot, a current speed of the host vehicle, and a target acceleration for deceleration.