Working Vehicle Task Switching Control via Steering Angle Detection
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Solution Overview
Problem
Existing control systems for working vehicles in farm fields struggle to accurately detect task switching due to communication limitations with GPS, leading to improper spraying of fertilizers or chemicals.
Innovation Solution
A control device that uses steering angle and traveling information to detect task switching, independent of GPS, and adjusts driving force maps based on identified tasks, including energy consumption and vehicle speed, to manage task details and ensure precise task execution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS positional information is used to detect task switching, then the system can identify location-based boundaries, but the communication period causes delays in accurately detecting when the vehicle actually turns around at the boundary
Solution Approach 1:
The patent replaces GPS-based positional detection with a steering angle-based detection system. The control device obtains steering angle information from a steering angle sensor and detects task switching when the steering angle exceeds a predetermined threshold, eliminating reliance on GPS communication cycles and achieving real-time detection without spatial-temporal lag.
2Reliability
If the vehicle relies on GPS communication to detect boundary crossing, then location-based control is possible, but the communication period causes the vehicle to start spraying chemicals before turning around or continue spraying fertilizers after turning around
Solution Approach 1:
The system substitutes GPS positional monitoring with direct mechanical sensing of the steering angle. By continuously monitoring the steering angle sensor output, the control device can precisely detect the moment when the vehicle begins to turn (when steering angle exceeds the threshold), enabling accurate task switching detection without the temporal lag inherent in GPS communication cycles.
Solution Approach 2:
The control device implements real-time feedback by continuously monitoring the steering angle and immediately responding when the predetermined angle threshold is exceeded. This closed-loop feedback mechanism ensures that task switching is detected at the exact moment the vehicle begins to turn, allowing the control device to adjust the implement operation timing accurately without delay.
3Object-affected harmful factors
If GPS-based boundary detection is used, then the system can prevent spraying on roads, but it cannot precisely detect the switching between tasks performed by the working vehicle in the farm field
Solution Approach 1:
The patent replaces GPS-based boundary detection with steering angle-based detection. The control device monitors the steering angle in real-time and detects task switching when the angle exceeds a predetermined threshold, providing precise detection of the vehicle's turning action regardless of GPS communication status and enabling accurate task transition control within the farm field.
Data Source
AI summary
Provided is a control device of a working vehicle including a prime mover and a driving mechanism that drives an implement based on power of the prime mover, wherein the control device is configured to obtain a steering angle of the working vehicle, and detect switching between tasks performed by the working vehicle in a farm field, when the steering angle is equal to or greater than a predetermined angle indicating the switching between tasks.