Grain Cart Auto-Steering for Precise Trailer Unloading Alignment

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Solution Overview

Problem

Agricultural machine operators face challenges in accurately aligning and positioning grain carts with trailers during unloading operations, leading to potential damage and material spillage due to incorrect offset and alignment, which increases operational stress and inefficiency.

Innovation Solution

A mobile agricultural machine equipped with a steering system and distance sensors that automatically maintain a prescribed lateral distance from a detected linear object surface, allowing the operator to focus on controlling the unloading process rather than steering, using a controller to receive operator inputs and generate steering outputs based on sensor data.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the operator manually steers the grain cart during unloading, then the operator can adjust to arbitrary trailer positions, but the alignment precision and lateral distance control deteriorate leading to potential damage and spillage

Engineering Contradiction:

Improveability to handle arbitrary trailer positionsVSAvoidalignment precision and lateral distance control

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent replaces manual mechanical steering control with an automated steering system that uses sensors to detect trailer position and automatically adjusts the grain cart's steering. This substitution maintains the ability to handle arbitrary trailer positions while significantly improving alignment precision and lateral distance control, eliminating the trade-off between adaptability and precision.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Manufacturing precision

If the operator focuses on correcting alignment and offset, then the lateral positioning accuracy improves, but the unloading efficiency and productivity deteriorate due to increased operational stress and time

Engineering Contradiction:

Improvealignment and offset accuracyVSAvoidunloading efficiency

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The automated steering system performs the alignment and positioning functions autonomously without requiring continuous operator intervention. The system self-adjusts the grain cart's position and orientation based on sensor feedback, freeing the operator to focus solely on monitoring the unloading process and controlling material flow, thereby improving both precision and productivity simultaneously.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system continuously monitors the grain cart's position relative to the trailer using sensors and provides real-time feedback to the steering control. This closed-loop feedback mechanism enables automatic correction of alignment and offset errors, ensuring high positioning accuracy while eliminating the need for constant manual adjustment, thus maintaining high unloading efficiency.

Inventive Principle:

Principle #23Feedback

3Device complexity

If no automated guidance system is used, then the device complexity remains low, but the measurement precision of lateral distance and alignment deteriorates

Engineering Contradiction:

Improvesteering system complexityVSAvoidlateral distance measurement accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent introduces sensor-based detection systems (such as ultrasonic, infrared, or vision sensors) that automatically measure lateral distance and alignment between the grain cart and trailer. These electronic measurement systems replace manual visual estimation and provide high-precision data to the control system, dramatically improving measurement precision while adding only moderate complexity through integrated sensor and controller components.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS20220071078A1Automatic machine guidance initiation for agricultural machine during unloading

Publication Date: 2022.03.10 DEERE & CO

AI summary

A mobile agricultural machine includes a steering system configured to steer the mobile agricultural machine. At least one distance sensor is mounted on the mobile agricultural machine and is configured to provide a distance sensor signal indicative of a distance from the mobile agricultural machine to a surface of a remote object. A controller is operably coupled to the steering system and the at least one distance sensor. The controller is configured to receive an operator input enabling object detection and responsively monitor the distance sensor signal of the at least one distance sensor to detect a linear object surface and to responsively generate a steering output to the steering system to maintain a prescribed lateral distance from the detected linear object surface.