Crane Stability Monitoring via Center of Gravity Prediction
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Solution Overview
Problem
Existing crane monitoring systems struggle to balance efficient operation with timely restriction of critical crane movements, particularly when dealing with variable support configurations and directional dependence of stability.
Innovation Solution
The method involves monitoring the overall center of gravity and estimating its future positions under various operating and influencing variables, allowing for the determination of a stability reserve and necessary restrictions on crane movements to prevent instability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the crane monitoring system continuously monitors the center of gravity position to ensure stability, then the safety and stability of the crane is improved, but the operational efficiency and freedom of movement is reduced due to frequent restrictions on crane movements
Solution Approach 1:
The system calculates future center of gravity positions in advance by considering possible crane movements and their effects on stability. This preliminary assessment allows the system to predict critical situations before they occur, enabling proactive restrictions rather than reactive responses, thus maintaining operational efficiency while ensuring safety
Solution Approach 2:
The monitoring device continuously feedbacks the current center of gravity position and predicted future positions to the control system. This feedback mechanism allows for real-time adjustment of crane operations, restricting movements only when necessary based on actual stability conditions, thereby balancing safety requirements with operational efficiency
2Adaptability or versatility
If the crane operates with variable support configurations to adapt to constricted space conditions, then the adaptability and versatility of the crane is improved, but the stability and directional dependence of the crane deteriorates
Solution Approach 1:
The system dynamically adjusts stability assessment and operational restrictions based on the current support configuration. When supports are partially extended due to space constraints, the system recalculates the center of gravity position and tipping edges accordingly, adapting the stability monitoring to the actual operational conditions rather than assuming a fixed stable configuration
Solution Approach 2:
The system changes the parameters used for stability assessment according to the support configuration. By modifying the tipping edge positions and center of gravity calculations based on whether supports are fully or partially extended, the system maintains accurate stability evaluation across variable operational conditions, enabling safe operation in constricted spaces
3Reliability
If the crane restricts movements to prevent reaching critical load limits, then the safety is improved, but the operational flexibility and movement freedom is reduced
Solution Approach 1:
The system performs preliminary calculations of future center of gravity positions and stability margins before restricting movements. By predicting whether a proposed movement would lead to critical conditions, the system can allow movements that are safe in advance while restricting only those that would create danger, thus maintaining operational flexibility when safety permits
Solution Approach 2:
The system applies preliminary counter-measures by calculating the effects of possible movements on stability before they occur. When a movement would lead to critical load conditions, the system preemptively restricts or modifies that movement, preventing the development of dangerous situations while allowing safe operations to proceed uninterrupted
Data Source
AI summary
The invention relates to a method for monitoring the operation of a crane, in which an overall center of gravity of the crane, possibly with a load attached thereto, is determined and monitored in terms of its position in relation to a tipping edge of the crane, wherein possible displacements of the overall center of gravity caused by possible changes in different operating and/or influencing variables, which comprise at least different crane movements, and resultant future overall centers of gravity are determined, wherein the most critical overall center of gravity in relation to the tipping edge is determined from the determined plurality of future overall centers of gravity and a possible restriction of crane movements is determined on the basis of the position of this most critical future overall center of gravity in relation to the tipping edge.