Tractor Auto-Travel Deceleration for Precise Field Turnarounds
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing automatic traveling systems for work vehicles face inefficiencies when changing direction, either requiring deceleration that causes delays or risking the vehicle leaving the field without proper stopping, leading to degraded work efficiency.
Innovation Solution
An automatic traveling system that includes a route generation processor, positioning processor, and traveling processor to generate and navigate a target route with controlled deceleration at a direction change position within a predetermined distance, ensuring precise direction changes without stopping at the target position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If deceleration control is performed before target position to temporarily stop at the target position, then the work vehicle can be stopped accurately at the direction change position, but the work efficiency is degraded because it takes time to change direction
Solution Approach 1:
The system changes the deceleration parameter dynamically based on the distance to the direction change position. When the distance is short, deceleration is applied to prevent field exit. When the distance is long, deceleration is not applied to maintain work efficiency. This parameter change resolves the contradiction by adapting the stopping behavior to the specific situation.
2Productivity
If deceleration control is not performed, then the time required for changing direction is shortened, but the work vehicle cannot be stopped at the target position and travels out of the field, causing automatic traveling to stop
Solution Approach 1:
The system performs preliminary assessment of the distance to the direction change position before executing the direction change. Based on this preliminary information, it decides whether deceleration is necessary to prevent field exit. This preliminary action ensures reliable automatic traveling continuation by preventing situations that would cause traveling to stop.
3Productivity
If the direction change position is far from the predetermined area, then the work vehicle can maintain higher speed for better efficiency, but the vehicle may not have enough distance to safely change direction
Solution Approach 1:
The system changes the speed parameter based on the distance to the direction change position. When the distance is short, speed is reduced to enable precise direction change. When the distance is long, speed is maintained for efficiency. This dynamic parameter adjustment resolves the contradiction between efficiency and precision.
Data Source
AI summary
A positioning unit measures the position of a tractor. An automatic traveling control unit causes the tractor to automatically travel according to a target route on the basis of positioning information of the positioning unit. In the case where the tractor changes its direction on a direction change route, when the distance from a field to an end position at which the front-rear direction of the tractor is switched is less than a predetermined distance, the automatic traveling controller executes deceleration processing of decelerating a target speed of the tractor toward the end position.