Rearview Mirror Alerts for More Reliable Reverse Object Detection
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Solution Overview
Problem
Despite the presence of rear vision systems and backup assist systems, accidents still occur during reversing maneuvers as drivers often fail to adequately detect objects behind their vehicles due to limited attention and reliance on rearview mirrors.
Innovation Solution
A visual alert system is integrated into the vehicle's rearview mirrors and cabin display, using a rear-mounted imaging sensor and video display to alert the driver of potential objects behind the vehicle during reverse maneuvers, prompting them to verify the presence and location of the object on the video screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drivers rely on rearview mirrors for detecting objects during reversing maneuvers, then the driver can maintain a simple monitoring system, but the detection reliability is insufficient leading to accidents
Solution Approach 1:
The monitoring system is segmented into multiple independent components: rearview mirrors for general monitoring, backup camera for detailed rear scene capture, and visual alert system for hazard notification. Each component performs a specific function, and their combined operation achieves high detection reliability without requiring a single complex system.
Solution Approach 2:
A visual alert system acts as an intermediary between the backup camera and the driver. When the camera detects potential hazards, the alert system notifies the driver through visual signals at the rearview mirrors, prompting them to verify the scene. This intermediary enhances reliability by ensuring drivers notice hazards they might otherwise miss during reversing maneuvers.
2Measurement precision
If drivers spend more time checking the rearward scene, then object detection accuracy improves, but the reversing maneuver time increases
Solution Approach 1:
The system enables drivers to perform self-verification of the rearward scene through visual alerts at the rearview mirrors. When hazards are detected, drivers are prompted to quickly check the backup camera display to verify the scene themselves, rather than relying solely on passive mirror monitoring. This self-service approach improves detection accuracy while maintaining driver control and minimizing time loss.
Solution Approach 2:
The backup camera continuously captures and displays the rearward scene before the driver completes the reversing maneuver. Visual alerts are generated in advance when potential hazards are detected, allowing drivers to take preliminary verification actions without significantly extending the overall reversing time. The system prepares hazard information ahead of time for driver review.
3Reliability
If a comprehensive backup assist system with multiple sensors is implemented, then object detection capability is enhanced, but the device complexity and cost increase
Solution Approach 1:
The rearview mirror assembly serves multiple functions: traditional rearward viewing, visual alert display for hazard notification, and integration with the backup camera system. This multi-functionality allows the same component structure to support both simple mirror monitoring and complex sensor-based detection, enhancing object detection capability without proportionally increasing overall system complexity.
Solution Approach 2:
The visual alert system is merged with the existing rearview mirror assembly rather than being implemented as a separate complex notification system. The alert signals are integrated into the mirror structure, allowing hazard information to be displayed at a location the driver already monitors during reversing maneuvers. This merging approach enhances detection capability while utilizing existing structural components.
Data Source
AI summary
A vehicular control system includes a central control module vehicle, a plurality of vehicular cameras disposed at a vehicle and viewing exterior of the vehicle, and a plurality of radar sensors disposed at the vehicle and sensing exterior of the vehicle. The plurality of vehicular cameras includes at least (i) a forward-viewing vehicular camera, (ii) a driver side sideward-viewing vehicular camera and (iii) a passenger side sideward-viewing vehicular camera. The central control module receives vehicle data relating to operation of the vehicle. Responsive at least in part to processing at the central control module of (i) image data captured by at least the forward-viewing vehicular camera and (ii) radar data captured by at least the front radar sensor, the vehicular control system at least in part controls a plurality of driver assistance systems of the vehicle.