Earthmoving Load-Container Control for Adaptive Dumping
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Solution Overview
Problem
Existing earth moving machines require skilled operators for efficient and precise dumping, leading to inefficiencies, material waste, and increased wear due to inappropriate dumping techniques, particularly for varying load adhesive properties.
Innovation Solution
A system that analyzes sensor data to determine material parameters, selecting optimal dumping modes such as rap out, gradual opening, or flowing spread based on adhesive properties, and automatically adjusts control data for precise and efficient unloading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rap out is used to fully dump sticky material, then the conveying container is emptied completely, but wear and fatiguing of machine components increases
Solution Approach 1:
The system changes the dumping parameters (speed, angle, duration) based on detected material properties. For sticky materials, it adjusts the dumping sequence to include multiple phases with varying speeds and angles, optimizing emptying completeness while minimizing unnecessary rap outs that cause wear.
Solution Approach 2:
The system uses sensors to detect material properties and dumping effectiveness in real-time, then adjusts the dumping strategy accordingly. This feedback mechanism ensures rap outs are only applied when necessary for sticky materials, reducing unnecessary wear while maintaining complete emptying.
2Reliability
If a rap out is applied to all loads, then sticky material is fully dumped, but efficiency decreases for fluent loads where rap out is unnecessary
Solution Approach 1:
The system varies dumping parameters based on material characteristics. For fluent materials like dry sand, it uses gentle dumping with slow container opening. For sticky materials, it applies rap outs or shaking motions. This adaptive approach optimizes efficiency for each material type.
Solution Approach 2:
The dumping strategy dynamically adapts to material properties detected by sensors. The system transitions between different dumping modes (gentle dumping, rap out, shaking) based on real-time material assessment, ensuring optimal efficiency for each loading condition.
3Manufacturing precision
If the operator manually controls dumping with complex sequences, then precise unloading is achieved, but skill requirements increase and workflow efficiency decreases
Solution Approach 1:
The system performs material detection and dumping strategy selection automatically without operator intervention. Sensors detect material properties and the control system autonomously selects and executes the appropriate dumping mode, eliminating the need for operator skill in judging material characteristics.
Solution Approach 2:
The system continuously monitors material properties and dumping progress, automatically adjusting control commands to achieve precise unloading. This closed-loop control maintains high precision while removing the need for operator skill in manual control.
4Reliability
If container movements are repeated to fully empty sticky material, then complete emptying is achieved, but available container volume for next operation decreases and more loading/unloading steps are required
Solution Approach 1:
The system detects sticky material properties before dumping and prepares the optimal dumping strategy in advance. For sticky materials, it pre-plans rap outs or shaking sequences that ensure complete emptying in a single controlled operation, preventing the need for repeated container movements and subsequent loading steps.
Data Source
AI summary
An improved controlling of a dumping of a load of an earth moving machine, which has a conveying container configured for carrying the load. Control data for maneuvering the conveying container according to a selected dumping mode are generated by analyzing perception data and/or machine sensing data to determine a material parameter providing information on an adhesive property of a current load of the conveying container. Based on the material parameter, an appropriate dumping mode is selected, e.g. to improve efficiency of the unloading sequence and to reduce wear of the earth moving machine.