WIRE-ROPES. (INCLUDES APPENDICES).

Combining Structure and Appearance for Anomaly Detection in Wire Ropes

We present a new approach for anomaly detection in the context of visual surface inspection. In contrast to existing, purely appearancebased approaches, we explicitly integrate information about the object geometry. The method is tested using the example of wire rope inspection as this is a very challenging problem. A perfectly regular 3d model of the rope is aligned with a sequence of 2d rope ...

Propagation of Ultrasonic Guided Waves in Composite Multi-Wire Ropes

Multi-wire ropes are widely used as load-carrying constructional elements in bridges, cranes, elevators, etc. Structural integrity of such ropes can be inspected by using non-destructive ultrasonic techniques. The objective of this work was to investigate propagation of ultrasonic guided waves (UGW) along composite multi-wire ropes in the cases of various types of acoustic contacts between neig...

Analysis of Structural Dependencies for the Automatic Visual Inspection of Wire Ropes

Automatic visual inspection is an arising field of research. Especially in security relevant applications, an automation of the inspection process would be a great benefit. For wire ropes, a first step is the acquisition of the curved surface with several cameras located all around the rope. Because most of the visible defects in such a rope are very inconspicuous, an automatic defect detection...

A Unified Fatigue and Fracture Model Applied to Steel Wire Ropes

Enhanced anomaly detection in wire ropes by combining structure and appearance

Automatic visual surface inspection is a challenging task, which has become important for quality assurance in the last years. Wire rope inspection is a special problem within this field. Usually, the huge and heavy ropes cannot be detached. Thus, an inspection of the ropes must be conducted, while the ropes are in use. The rope surface exhibits various appearance characteristics so that the ex...