Active Crane Jib Deformation Control via Sensor Feedback
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Solution Overview
Problem
Existing crane systems face challenges in maintaining load-bearing capacity due to jib deformations caused by external loads, leading to reduced stability and increased stress on components, which are not effectively addressed by passive anchoring systems.
Innovation Solution
An activatable adjusting unit is integrated into the crane system to actively counteract deformations by detecting changes with a sensor unit and applying restoring forces, allowing for precise control of the jib system's geometry and anchoring forces to maintain the load plane and enhance load-bearing capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If passive anchoring systems are used to reduce jib deformation, then jib stability is improved, but device complexity and material usage increase
Solution Approach 1:
The patent transforms the static passive anchoring system into a dynamic active system by introducing actuators that can adjust anchoring forces in real-time. The anchoring device includes movable anchoring elements and control units that respond to sensor feedback, enabling the system to adapt to varying load conditions and maintain optimal jib stability without requiring excessive material or complex fixed structures.
Solution Approach 2:
The patent implements a feedback control mechanism where sensors detect jib deformation or position deviations, and this information is fed to control units that adjust the anchoring forces accordingly. This closed-loop system enables automatic correction of jib deformations, replacing the need for over-engineered passive anchoring structures with an intelligent, responsive system that uses minimal material while maintaining high stability.
2Strength
If additional material is used to strengthen the jib system, then load-bearing capacity is improved, but weight and material usage increase
Solution Approach 1:
The patent employs dynamic actuators and adjustable anchoring elements that can actively compensate for jib deformations under load. This allows the use of lighter, more slender jib structures that would otherwise require excessive material for passive strengthening. The active system dynamically adjusts to maintain structural integrity, enabling weight reduction while preserving load-bearing capacity.
Solution Approach 2:
The patent changes the operational parameters of the jib system by introducing active control mechanisms that adjust anchoring forces, actuator positions, and system geometry in real-time. This enables slender jib structures to achieve high load-bearing capacity through intelligent parameter adjustment rather than through increased material quantity, allowing optimization of the length-to-thickness ratio.
3Strength
If passive geometric load transfer is used to increase jib rigidity, then load-bearing capacity is improved, but device complexity increases
Solution Approach 1:
The patent replaces static geometric load transfer structures with dynamic active control elements including actuators and adjustable anchoring devices. These elements can actively maintain jib rigidity and correct deformations without requiring complex fixed geometric arrangements. The system adapts its structural configuration in real-time, simplifying the overall design while maintaining high rigidity through intelligent control rather than through complicated passive geometry.
4Productivity
If longer slender jibs are used to increase reach, then productivity is improved, but deformation and stability worsen
Solution Approach 1:
The patent enables the use of longer, more slender jibs by introducing active control systems with actuators and adjustable anchoring elements that dynamically compensate for the increased flexibility and deformation of long jibs. The system continuously monitors and corrects position deviations, allowing the crane to achieve extended reach with slender jibs while maintaining stability through real-time active control rather than through increased structural mass.
Solution Approach 2:
The patent implements feedback control mechanisms with sensors that detect the position and deformation of long slender jibs, and control units that adjust anchoring forces and actuator positions to maintain stability. This closed-loop system enables long jibs to operate stably by continuously correcting deformations, allowing increased productivity through extended reach without sacrificing the stability that would otherwise be lost in slender structures.
Data Source
AI summary
A crane having at least one jib system, a sensor unit for detecting a deformation of the jib system transversely to a load plane, and to an activatable adjustment unit for influencing the deformation of the jib system transversely to the load plane.