Arrangements for the one-dimensional or multi-dimensional determination of the position of a load suspension point in hoists

US6229473A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Guenter Doemens · Holzkirchen, DE
• Wolfgang Wichner · Wendelstein, DE

Key dates

• Filing date: Nov 17, 1999
• Grant date: May 8, 2001
• Expiry date: Nov 17, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S13/878
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The stopping of a load suspended from a crane requires a swing control or, respectively, a swing damping. Upon employment of microwave measuring units, spacings between a carrying cable suspension and a load suspension point are determined on the basis of transit time measurements. The position of the load suspension point can be determined from the transit time measurements quickly and with high precision. Swinging motions are avoided by controlled opposing control of the carrying cable suspension.