Crane Attachment Position Estimation for Deformation-Aware Clearance
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Solution Overview
Problem
Conventional construction planning simulation systems for cranes fail to accurately represent the deformation of attachments due to suspended loads, leading to a significant difference between simulation and actual work in terms of working radius and lifting height.
Innovation Solution
An information acquisition system that estimates the position of attachments and suspended cargo based on mass and posture information, deriving the possibility of interference with external objects, thereby providing a more realistic simulation by considering deformation in actual boom work.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional construction planning simulation systems are used, then simulation computation is simple and fast, but the simulation results show large difference from actual work in terms of working radius and lifting height due to inability to express deformation
Solution Approach 1:
The patent introduces a position estimation unit as an intermediary component that calculates attachment positions by considering deformation caused by suspended cargo weight. This unit receives input data (attachment specifications, cargo weight, posture information) and outputs corrected position information that accounts for elastic deformation, thereby improving simulation accuracy without requiring a complete overhaul of the simulation system
Solution Approach 2:
The patent changes the parameters used in position calculation from rigid-body coordinates to flexible coordinates that incorporate deformation effects. By modifying the position estimation methodology to include deformation parameters (such as deflection amounts based on cargo weight and attachment elasticity), the system achieves more accurate working radius and lifting height predictions while maintaining computational efficiency
2Productivity
If attachment deformation is not considered in simulation, then computation is simpler and faster, but the working radius and lifting height in simulation differ significantly from actual work
Solution Approach 1:
The patent creates a simplified computational model that copies the essential deformation behavior of attachments without requiring full finite element analysis. The position estimation unit uses pre-established relationships between cargo weight, attachment specifications, and deflection amounts to calculate corrected positions, achieving a balance between computational simplicity and accuracy
Solution Approach 2:
The patent applies partial deformation consideration rather than full elastic analysis. By focusing only on the critical deformation effects (vertical deflection due to cargo weight) and using simplified calculation methods, the system achieves sufficient accuracy improvement without the computational cost of complete structural analysis
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system faithfully reproduces the state of an actual working machine, reducing the difference between simulation and reality by accurately modeling attachment deformation, allowing for closer-to-reality work simulations.
Implementation Method 1
attachments deform due to their own weights and the suspended cargo. Specifically, when the suspended cargo is suspended or the rope is wound up to suspend the suspended cargo, the attachments deflect.
Data Source
AI summary
An information acquisition system includes a first input acquisition unit that acquires masses of the attachment and the suspended cargo as first input, a second input acquisition unit that acquires information about a posture of the attachment as second input, a position estimation unit that estimates the position of at least one of the attachment and the suspended cargo, based on the first input and the second input, and an information derivation unit that derives information about the possibility of interference between the external object and at least one of the attachment and the suspended cargo, based on the position of at least one of the attachment and the suspended cargo estimated by the position estimation unit.