03.06.17 – Saggiomo, M.; Klug, J.; Gloy, Y.-S.; Gries, T.
Vision-based shed inspection supporting the automated removal of faulty weft threads in air-jet weaving machines
Technical fabrics demand high quality measures. Depending on the specific application e.g. airbags for automotive industry, fabric defects are unacceptable. A possible reason for fabric defects are faulty weft threads. To fix faulty weft threads in air-jet weaving, modern machines have a system for automatic removal of faulty weft threads. This system has a reliability of about 80 %. In 20 % of the cases, the automatic removal system reports successful removal to the machine but there is still dirt or fragments of the faulty weft thread in the shed.
The goal is to increase the reliability of the system for automatic removal of faulty weft threads to 95 % in order to increase the productivity of weaving mills for high quality technical fabrics. The time loss caused by faulty weft threads is reduced. Thus, the efficiency of the air-jet weaving process is increased.
In order to increase the reliability of the system for automatic removal of faulty weft threads, a machine vision system for shed inspection in air-jet weaving machines is developed. The machine vision system checks if the shed is clean after the automatic thread removal proce-dure is completed.