Snag detection system

EP4770943A1Pending Publication Date: 2026-07-08KONECRANES GLOBAL OY
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Patent Information

Application Number
EP2024769418
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-08-29
Filing Date
2024-08-28
Publication Date
2026-07-08

AI Technical Summary

Technical Problem

Existing snag detection systems for crane systems are prone to errors and are not universal, as they require experimentally derived threshold values specific to each crane system's dynamic properties, making them time-consuming to set up and difficult to adapt for different systems.

Method used

A crane system equipped with sensors to measure the angle of the carrying member relative to the trolley/hoist, a dynamic model to estimate the angle during movement, and a controller that compares the estimated and measured angles to control the horizontal movement of the trolley/hoist, thereby preventing snagging.

Benefits of technology

The system provides accurate and flexible snag detection, reducing the risk of damage to loads, ropes, and equipment, and allowing for adaptation to various crane systems with minimal configuration, while maintaining normal operation unless snagging is detected.

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Abstract

The present invention relates to a crane system (2) comprising a trolley (7) to support a load and movable about a horizontal direction to provide movement of the load in a horizontal direction accordingly and a carrying member (10) supported by the trolley (7) and configured to carrying the load in use. A sensor (22,24) to measures the angle of the carrying member (10) relative to the trolley (7) and a controller (20) is configured to provide a dynamic model of the trolley (7) to determine an estimated angle of the carrying member (10) during movement of the trolley (7). The controller (20) is configured to compare to the estimated angle and the measured angle and control horizontal movement of trolley (7) in accordance with said comparison.
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