Field Vehicle Slip Detection for Automatic Path Control
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Solution Overview
Problem
Existing slip determination systems for agricultural field vehicles lack effective control mechanisms to prevent deviations from a target travel path due to slippery conditions, and travel path generation systems fail to consider the work state of preceding vehicles, leading to inefficiencies in agricultural work planning and execution.
Innovation Solution
A slip determination system that calculates slip amounts using satellite navigation and axle revolutions, determining appropriateness for automatic travel and adjusting turning performance, combined with a travel path generation system that acquires and considers work information from preceding vehicles to optimize travel paths for subsequent vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If automatic travel control is implemented in slippery field conditions, then travel automation is improved, but vehicle deviation from target path increases due to wheel slip
Solution Approach 1:
The system continuously calculates slip amounts by comparing estimated movement distance (from axle revolutions) with actual movement distance (from satellite navigation), and uses this feedback to determine appropriateness for automatic travel and adjust turning performance accordingly
Solution Approach 2:
The system dynamically adjusts turning performance parameters based on real-time slip conditions, making the automatic travel control adaptive to changing field conditions rather than operating with fixed parameters
2Productivity
If travel path is generated without considering preceding vehicle's work state, then path calculation speed is improved, but work efficiency decreases due to unnecessary rework
Solution Approach 1:
The system acquires and stores work state information from preceding vehicles before generating the travel path, so that the path can be optimized in advance to avoid areas requiring rework, rather than reacting to problems after they occur
Solution Approach 2:
The travel path generation system serves multiple functions: it calculates optimal paths while simultaneously considering and integrating work state information from different types of field work vehicles, making the system adaptable to various agricultural operations
3Measurement precision
If slip amount calculation uses both satellite navigation and axle revolutions, then measurement accuracy is improved, but system complexity increases
Solution Approach 1:
The system uses the slip amount calculation as an intermediary process that integrates data from two different measurement sources (satellite navigation and axle revolutions), comparing them to detect discrepancies that indicate wheel slip
Data Source
AI summary
A slip determination system is provided that is capable of providing appropriate control information to a traveling vehicle when the traveling vehicle has proceeded to an area where a slip is likely to occur during automatic travel. The slip determination system includes: a vehicle position detection module for detecting a vehicle position; and an automatic travel control portion for enabling automatic travel based on the vehicle position and a set travel path; a slip amount calculation portion for calculating a slip amount of the traveling vehicle body, using an estimated movement distance of the traveling vehicle body calculated based on the number of revolutions of a driving axle of the traveling vehicle body, and an actual movement distance of the traveling vehicle body calculated based on the vehicle position; an appropriateness determination portion for performing appropriateness determination to determine, based on the slip amount, whether or not a state of a traveling ground surface is appropriate for automatic travel; and an automatic travel stop portion for stopping automatic travel based on a determination result.