Pedestrian Detection Control for Commercial Vehicle Front Blind Spots
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Solution Overview
Problem
Commercial vehicles equipped with automatic emergency braking systems face challenges in accurately detecting pedestrians within the vehicle's front blind spot due to the positioning of forward-facing cameras, leading to potential collisions, especially with individuals of shorter stature.
Innovation Solution
A vehicle system incorporating a forward-looking camera and driver assistance controller that identifies pedestrians within its field of view and triggers service braking when the distance is less than a predetermined threshold, maintaining braking requests even if the pedestrian moves out of the camera's view by using historical data and radar confirmation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a forward-facing camera is mounted behind the windshield for pedestrian detection, then the system can identify pedestrians within the field of view, but pedestrians may become fully immersed in the front blind spot as the vehicle moves closer, reducing detection accuracy
Solution Approach 1:
The system activates service braking in advance when a pedestrian is detected within a predetermined distance, before the pedestrian fully enters the blind spot where detection would be lost. This preliminary action ensures braking intervention occurs while the pedestrian is still detectable by the camera.
Solution Approach 2:
The driver assistance controller continuously monitors the pedestrian's position and maintains the braking signal as long as the pedestrian remains within the detection threshold, creating a feedback loop that adapts braking intervention to real-time detection conditions.
2Reliability
If the driver assistance controller maintains braking signal until the pedestrian is no longer identified as a target, then continuous braking intervention is provided even when pedestrian moves out of camera view, but this increases the duration of braking action beyond what traditional systems would apply
Solution Approach 1:
The system initiates braking action in advance when the pedestrian is first detected within the predetermined distance, before the pedestrian enters the blind spot. This ensures that braking intervention begins while detection is still reliable.
Solution Approach 2:
The braking signal is maintained continuously as long as the pedestrian remains identified as a target within the predetermined distance, ensuring uninterrupted braking intervention throughout the critical approach phase, rather than interrupting when the pedestrian temporarily moves out of view.
Data Source
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AI summary
A vehicle system for a commercial vehicle comprises a first forward-looking camera, a service braking controller; and a driver assistance controller communicating with the first forward looking camera and the service braking controller. The driver assistance controller identifies a pedestrian as a target within the field of view of the first forward looking camera, determines a distance to the pedestrian is less than or equal to a predetermined distance, transmits a signal to the service braking controller to request deceleration of the vehicle in response to the distance to the pedestrian being less than or equal to the predetermined distance. The driver assistance controller maintains the signal to the service braking controller until the pedestrian is no longer identified as a target.