US 4,591,995 A · Process and device for monitoring single strands in stranding processes

Abstract

For monitoring stranding machines for breakage or run-out of single strands, a device is employed which checks the rope or cable after stranding for uniformity of the rope or cable surface. For this purpose, an electrical image of the rope or cable surface is read into a memory and the measured values compared with this stored pattern during the further stranding process. In the event of deviations resulting from this comparison, disconnecting or other actuating elements are actuated in order to avoid the production of further faulty lengths of rope or cable. For reflection measurements, electromagnetic, optical or acoustic waves can be employed. Instead of scanning of the rope or cable surface based on reflection, corpuscular radiation which partially penetrates the rope or cable can be employed.

Claims14

Dependent claims

A process for monitoring single strands for correct sequence, correct surface quality, breakages or run-outs in the stranding process for manufacture of multi-strand rope or cable, comprising the steps of:

storing a signal pattern representative of at least one peripheral line of a representative section in the longitudinal direction of a fault-free rope or cable;
scanning a rope or cable with wave energy along a peripheral line corresponding to that of said stored signal pattern;
converting wave energy received from said rope or cable to an electrical signal;
comparing the pattern of said electrical signal with said stored signal pattern to detect differences therebetween, and
generating a fault signal when the difference between said electrical signal and said stored signal pattern exceeds a predetermined tolerance limit.

2 more elements

Dependencies are inferred from the claim text.

Process and device for monitoring single strands in stranding processes

Life of this patent

Process and device for monitoring single strands in stranding processes

Life of this patent

Abstract

Claims14