Vehicle Obstacle Detection Excluding Distant Moving Objects
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Solution Overview
Problem
Existing driver assistance technologies frequently issue alarms for moving obstacles, such as walls or guardrails, that are unlikely to enter the vehicle's expected travel route, causing driver annoyance.
Innovation Solution
An obstacle detecting and notifying device that calculates the expected moving routes of both the vehicle and obstacles, sets an alarm area, and excludes obstacles unlikely to reach this area, thereby minimizing unnecessary alarms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If alarm is issued for all detected moving obstacles in the monitoring area, then obstacle detection coverage is improved, but false alarm frequency increases causing driver annoyance
Solution Approach 1:
The monitoring area is segmented into multiple regions (first region closer to vehicle, second region farther away). Different alarm policies are applied to different segments: obstacles in the first region trigger alarms, while obstacles in the second region are excluded from alarming. This spatial segmentation resolves the contradiction by detecting all obstacles for safety while filtering out distant ones that cause false alarms.
Solution Approach 2:
Different quality characteristics are applied to different spatial zones. The alarm notification characteristic is applied locally to obstacles in the first region, while obstacles in the second region receive a different treatment (exclusion from alarm). This local differentiation allows the system to maintain high detection coverage while reducing false alarms in specific areas.
2Measurement precision
If alarm area is set to cover the entire monitoring area, then detection sensitivity is improved, but unnecessary alarms increase during parking operations
Solution Approach 1:
The alarm area is made dynamic by adjusting its boundaries based on vehicle operation state. During normal driving, the alarm area covers the monitoring region appropriately for safety. During parking operations, the alarm area is automatically adjusted to exclude zones where unnecessary alarms would occur, allowing drivers to focus on parking without interruptions.
Solution Approach 2:
The system changes the parameter of alarm area boundaries based on vehicle operation state. By detecting whether the vehicle is in driving or parking mode, the system adjusts the spatial extent of the alarm area, reducing it during parking to prevent unnecessary alarms while maintaining sensitivity during normal driving.
Data Source
AI summary
An obstacle detecting and notifying device according to an embodiment is to be installed in a vehicle, to issue an alarm upon detecting a moving obstacle. The device includes a moving-obstacle detector that detects a moving obstacle in a given monitoring area; a first calculator that calculates an expected moving route of the moving obstacle; a second calculator that calculates an expected moving route of the vehicle; a setter that sets an alarm area in the monitoring area in accordance with the expected moving route of the vehicle, the alarm area in which the alarm is to be issued; an excluder that excludes, from alarming moving obstacles, the moving obstacle unlikely to reach the alarm area, in accordance with the expected moving route of the moving obstacle and the expected moving route of the vehicle; and an alarm that issues an alarm against the alarming moving obstacles.