Control system for cable crane
US5392935A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1993 |
| Grant date | Feb 28, 1995 |
| Priority date | — |
| Expiry date | Aug 13, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02D17/18
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A cable crane system includes a main cable stretched between two points, a transverse trolley traveling along the main cable, a traction cable for driving the trolley, a bucket hung by a hanging cable, a transverse winch for driving the traction cable for driving the trolley between a transportation start position to a transportation end position, a vertical winch for retracting and extracting the hanging cable for lifting the bucket up and down, and driving means for the transverse and vertical winches. A control system for such cable crane system comprises means for detecting a weight of an object for transportation including the trolley and the bucket, means for detecting transverse traveling magnitude and speed of the trolley, means for detecting vertical traveling magnitude and speed of the bucket, arithmetic means for deriving a predicted value of a deflection magnitude of the main cable on the basis of a trace of the main cable preliminarily established as a numerical model corresponding to the overall weight loaded on the main cable, detected by the weight detecting means, a coordinate of a starting point and target destination point of the trolley, and transverse traveling…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.