Ground Pressure Control for Mobile Working Machines
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Solution Overview
Problem
Existing methods fail to effectively compare the current load-bearing capacity of the ground with the ground pressure generated by a ramming and/or drilling device, particularly for machines with no support feet, leading to a risk of tipping over due to yielding ground conditions.
Innovation Solution
A method that determines the maximum permissible ground pressure through manual input or automatic measurement, calculates the actual ground pressure using sensors and a calculation model, and provides feedback to the operator to prevent exceeding this limit, using visual cues like color displays or percentage feedback to indicate permissible or impermissible loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the machine operates with high mast configuration to increase working reach, then productivity is improved, but the risk of tipping over due to ground yielding increases
Solution Approach 1:
The system performs preliminary assessment of ground bearing capacity before the machine begins operation or enters critical loading states. Sensors continuously monitor ground conditions and predict potential yielding before it occurs, allowing preventive actions to be taken such as adjusting ballast or limiting operational parameters.
Solution Approach 2:
The system implements continuous feedback by monitoring actual ground pressure through sensors and comparing it against the determined bearing capacity limit values. This feedback loop enables real-time detection of approaching critical states and triggers warnings or automatic protective measures to prevent tipping.
2Stability of the object's composition
If support legs are added to stabilize the machine on weak ground, then stability is improved, but the machine cannot be used in motion or for piling operations
Solution Approach 1:
The system replaces mechanical stabilization elements (support legs) with a computational and sensor-based monitoring system. Instead of physically modifying the machine to add support structures, the invention uses sensors, computational models, and control algorithms to detect and respond to ground stability issues, maintaining operational flexibility while ensuring safety.
3Measurement precision
If the operator manually assesses subsurface conditions using geologists and measuring instruments, then measurement precision is improved, but the complexity of operation increases and real-time monitoring is not achieved
Solution Approach 1:
The system enables the machine to autonomously determine its own operating limits by integrating sensors that directly measure ground response to the machine's presence and operation. The computational model automatically processes this data to determine bearing capacity, eliminating the need for external geologists or complex manual assessment procedures.
Solution Approach 2:
The system introduces computational models and sensor systems as intermediaries between the machine and the ground. Rather than requiring direct human assessment through complex geological instruments, the computational model acts as an intermediary that translates raw sensor data into meaningful bearing capacity determinations and limit values.
Data Source
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AI summary
The invention relates to a method for operating a mobile working machine with ground pressure limitation and to a corresponding working machine. A maximum allowable ground pressure is compared to the actual ground pressure.