Camera-Based Trailer Angle Detection for Turn Signal Deactivation
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Solution Overview
Problem
Automatic deactivation of turn signals in semi-trailer trucks is complicated due to the need to ensure the trailer has completed a turn, which cannot be reliably determined by the steering wheel position alone, and adding sensors to detect the trailer's angle increases mechanical complexity.
Innovation Solution
A camera monitoring system provides information to an electronic control unit (ECU) to determine when the trailer's angle has departed from and returned to a centered position, allowing the ECU to automatically deactivate the turn signal indicator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensors are added to detect the trailer's angle, then the accuracy of turn completion detection is improved, but the mechanical complexity of the vehicle increases
Solution Approach 1:
The patent replaces mechanical angle sensors with a vision-based system using existing cameras and image processing algorithms to detect trailer angle and determine turn completion, thereby avoiding additional mechanical components while maintaining detection accuracy
Solution Approach 2:
The patent utilizes existing cameras originally designed for other purposes (such as backup cameras or side-view cameras) to perform trailer angle detection, making the system multi-functional without requiring dedicated sensors
2Reliability
If the turn signal remains activated until the trailer completes the turn, then the safety and communication accuracy are improved, but the duration of turn signal activation increases
Solution Approach 1:
The patent implements a feedback mechanism where the camera system continuously monitors trailer position and provides real-time information to the ECU, which automatically deactivates the turn signal when the trailer returns to the centered region, creating a closed-loop control system that adapts to actual turn completion
Data Source
AI summary
In some embodiments of the present disclosure, techniques are provided for automatic turn signal deactivation in a vehicle with a trailer. The vehicle includes a camera monitoring system that provides video images for display devices that replace traditional side view mirrors. In some embodiments, video information is obtained from the camera monitoring system and is used to determine an angle of the trailer. Upon activation of a turn signal indicator, the video information is used to detect departure of the trailer angle from a centered region and the subsequent return of the trailer angle to the centered region in order to automatically deactivate the turn signal indicator.