Crane Load Limit Control Based on Wind Resistance
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Solution Overview
Problem
Existing crane control systems fail to adequately account for wind resistance when determining load limits, leading to suboptimal stability and performance in varying wind conditions.
Innovation Solution
A wind resistance detection device adjusts load limits based on detected wind resistance parameters, considering the presence and position of wind-catching components like operator platforms and advertising surfaces to enhance stability and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed load limits are used in crane control systems, then safety is ensured under worst-case wind conditions, but crane performance and load capacity are reduced in calmer wind conditions
Solution Approach 1:
The patent implements dynamic adjustment of load limits based on real-time wind resistance detection. The monitoring device continuously detects wind resistance parameters and adjusts the load limits accordingly, transitioning from fixed static limits to dynamic adaptive limits that optimize both safety and performance under varying environmental conditions
Solution Approach 2:
The patent changes the parameter of load limits from fixed values to variable values that depend on detected wind resistance parameters. The control system modifies operational parameters (load limits, speeds, accelerations) based on environmental conditions, allowing the crane to operate with higher load capacity in calm conditions while maintaining safety margins in windy conditions
2Productivity
If wind resistance detection and dynamic load limit adjustment is implemented, then crane performance is optimized, but device complexity increases
Solution Approach 1:
The monitoring device is designed to serve multiple functions: it detects wind resistance parameters, determines their impact on crane stability, and adjusts operational parameters accordingly. This multi-functional approach consolidates what could be separate complex systems into a unified control mechanism
Solution Approach 2:
The patent implements a feedback loop where the monitoring device continuously detects wind resistance parameters, compares them against stability criteria, and automatically adjusts load limits and operational parameters. This closed-loop feedback system enables automatic adaptation without requiring complex manual intervention or oversight
Data Source
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AI summary
The present invention relates to a crane, for example in the form of a fast-erecting crane comprising a telescopic and/or luffing tower, having a crane controller (21) for controlling crane movements by means of drive devices, wherein the crane controller has a monitoring device (22) for monitoring stability and limiting crane movements if a load limit is reached. According to the invention, the monitoring device has a wind resistance detection unit (20) for detecting at least one variable wind resistance parameter which influences the wind resistance of the crane, and is designed to change the load limit depending on the detected wind resistance parameter and/or to consider different load limits depending on said wind resistance parameter.