Rear-Side Alarm Device Trailer Detection Zone Segmentation
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Solution Overview
Problem
Rear-side alarm devices malfunction when rear sensors are blocked by obstacles, such as trailers, leading to reduced effectiveness in preventing collisions during lane changes.
Innovation Solution
A rear-side alarm system that includes sensors and a controller to detect trailers and set system activation and deactivation areas based on trailer status information, allowing the system to differentiate between the trailer and other vehicles and perform alarm operations only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rear sensors continuously monitor the rear area to detect obstacles, then collision prevention capability is improved, but false alarm occurs when trailers are detected
Solution Approach 1:
The monitoring area is segmented into multiple zones: a trailer-specific zone directly behind the vehicle where trailers are expected to be present, and other areas for general obstacle detection. This segmentation allows the system to differentiate between trailers (which generate false alarms) and actual obstacles requiring alarm, thereby reducing false alarms while maintaining collision prevention capability.
Solution Approach 2:
The system dynamically adjusts its detection and alarm behavior based on the detected object type. When a trailer is detected in the trailer-specific zone, the system adapts by not generating false alarms for that zone. This dynamic adaptation allows the system to maintain high reliability for collision prevention while eliminating false alarms generated by trailers.
2Object-generated harmful factors
If the alarm system is deactivated when trailers are detected, then false alarm is eliminated, but collision warning capability is reduced
Solution Approach 1:
The system segments the alarm function by zone: the trailer-specific zone has alarm suppression when trailers are present, while other zones maintain full alarm functionality. This allows the system to eliminate false alarms from trailers while preserving collision warning capability for other areas such as blind spots and lateral zones.
Solution Approach 2:
Different alarm policies are applied to different spatial zones. The trailer-specific zone receives special treatment with suppressed alarms when trailers are detected, while other zones maintain normal alarm behavior. This local differentiation ensures that false alarms are eliminated without compromising overall collision warning capability.
3Object-generated harmful factors
If the system distinguishes between trailers and other vehicles, then false alarm is reduced, but system complexity increases
Solution Approach 1:
The system performs preliminary classification of detected objects to identify trailers before generating alarms. By pre-identifying trailers using specific detection criteria and zones, the system can prevent false alarms without requiring complex post-detection analysis, thereby reducing overall system complexity while still achieving false alarm reduction.
Solution Approach 2:
The patent introduces an intermediary classification mechanism that sits between sensor detection and alarm generation. This intermediary layer uses relatively simple criteria (object position in trailer-specific zone, basic object characteristics) to identify trailers and prevent false alarms, avoiding the need for complex image recognition or detailed object analysis while still achieving effective false alarm reduction.
Data Source
AI summary
A rear-side alarm device and a rear-side alarm method thereof. The rear-side alarm device includes a sensor and a controller. The sensor monitors a rear area or a rear-side area of a vehicle. If a trailer connected to the vehicle is detected, the controller sets a system deactivation area and a system activation area, based on status information of the trailer, and controls an alarm operation to be performed by judging whether or not another vehicle has entered into the system activation area. The rear-side alarm device can operate normally even in the case in which a trailer is connected to a vehicle, thereby providing driving safety to a driver.