Tractor-Trailer Turn Signal Control Using Alignment Angle Feedback
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Solution Overview
Problem
Self-cancelling turn signals in tractor-trailers often cancel prematurely due to the tractor and trailer turning differently, leading to safety risks and inefficiencies, especially during complex maneuvers like the Button Hook turn.
Innovation Solution
A turn signal control system using sensors to detect the angle between the tractor and trailer portions, a computing device to analyze this angle, and a controller to automatically cancel the turn signal when the angle reaches 180°, ensuring accurate signal cancellation during turns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If self-cancelling turn signals use steering angle and timer to determine cancellation, then turn signal cancellation is automated, but the turn signal frequently cancels too early
Solution Approach 1:
The system continuously monitors the relative angle between tractor and trailer through sensors and uses this feedback to dynamically adjust turn signal cancellation timing. The controller receives real-time angle data and compares it against threshold values (e.g., 180 degrees) to determine the appropriate cancellation moment, ensuring the turn signal remains active throughout the entire turning maneuver including counter-steering phases.
2Device complexity
If turn signals are cancelled based on steering inputs alone, then the cancellation process is simple, but the trailer may still be continuing in its turn causing safety risks
Solution Approach 1:
The system introduces a fifth wheel angle sensor as an intermediary measurement device that directly measures the relative orientation between tractor and trailer. This sensor provides accurate angle data that serves as a reliable basis for cancellation decisions, bridging the gap between simple steering input detection and complex trailer position monitoring.
3Reliability
If self-cancelling turn signals are not offered as standard equipment, then the issues with premature cancellation are avoided, but drivers lose the convenience and safety benefits of automated turn signal cancellation
Solution Approach 1:
The system segments the turn signal control function into distinct modules: a steering angle sensor for driver input detection, a fifth wheel angle sensor for trailer position monitoring, and a controller that integrates both data sources. This segmentation allows the system to maintain automated cancellation convenience while improving reliability through multi-source verification of turn completion.
Data Source
AI summary
A turn signal control system and method for controlling a turn signal are provided. The turn signal control system may comprise one or more sensors, coupled to a tractor-trailer. The tractor-trailer may comprises a tractor portion and a trailer portion. The one or more sensors may be configured to detect one or more data points pertaining to a position of the tractor portion in relation to the trailer portion. The turn signal control system may comprise one or more computing devices, each comprising a processor and a memory, configured to analyze the one or more data points to determine an angle between the tractor portion and the trailer portion, and a controller configured to automatically cancel a turn signal based on one or more factors. The one or more factors may comprise the angle between the tractor portion and the trailer portion.