Driving Assistance Device Obstacle Detection Lane Deviation
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Solution Overview
Problem
When a vehicle deviates from a lane due to a driver's operation, existing lane deviation prevention systems either cancel the assistance or continue to alert, leading to a risk of collision with the road edge or going off the road, as the driver may not notice the approach to the physical road edge.
Innovation Solution
A driving assistance device with a processor and memory that includes an external environment information acquisition unit, obstacle detection, lane detection, alarm, and state management units, which suppresses alarms or steering assists when an obstacle is detected, allowing the vehicle to deviate from the lane without preventing deviation from the road edge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lane deviation prevention function is canceled when an obstacle is detected, then the driver can freely change lane or pass the obstacle, but the driver may deviate from the road edge without noticing
Solution Approach 1:
The system dynamically changes the alarm function based on the detected situation. When an obstacle is detected in the lane, the alarm function is selectively canceled to allow lane changing. When no obstacle is detected but road edge deviation is detected, the alarm function is activated. This dynamic adjustment resolves the contradiction between ease of operation and reliability.
2Reliability
If the lane deviation alarm function continues when the vehicle deviates from the lane, then road edge safety is maintained, but the driver's intended lane deviation is hindered
Solution Approach 1:
The system uses feedback from obstacle detection to control the alarm function. When an obstacle is detected, the system feedbacks to cancel the alarm, allowing intended lane deviation. When no obstacle is detected, the alarm remains active to ensure road edge safety. This feedback mechanism resolves the contradiction between reliability and ease of operation.
3Ease of operation
If the alarm function is canceled when an obstacle is detected, then lane changing is facilitated, but the distinction between intended and unintended deviation is lost
Solution Approach 1:
The system segments the alarm function into two independent parts: one for lane deviation and one for road edge deviation. By selectively canceling only the lane deviation alarm when an obstacle is detected while maintaining the road edge alarm, the system preserves information about road edge safety while facilitating lane changing. This segmentation resolves the contradiction between ease of operation and information loss.
Data Source
AI summary
A driving assistance device that includes a processor and a memory and assists driving of a vehicle includes: an external environment information acquisition unit that acquires external environment information of the vehicle; an obstacle detection unit that detects an obstacle in front of the vehicle from the external environment information; a lane detection unit that detects a lane boundary line and a road edge from the external environment information; an alarm unit that issues an alarm or performs steering assist when deviation from the lane boundary line or the road edge is detected; and a state management unit that suppresses the alarm or the steering assist when the obstacle detection unit detects the obstacle.