Patent ID: 9726616
Date: 2017-08-08
CPC Classifications: B29C,B65H,D03D,D03J,D06H,F01D,G01N

Claim:
1. A method of determining weaving anomalies in a machine for weaving or winding a fiber preform onto a mandrel having an axis of rotation that is substantially horizontal for receiving the preform, the mandrel being driven about the axis of rotation by a motor actuated by a control unit; said method comprising: scanning and acquiring images, with a plurality of cameras looking at the underside of the fiber texture, of the bottom face of the fiber preform, processing, with an image analysis module, the images of the bottom face of the fiber preform in a plurality of adjacent scan windows in order to extract weaving patterns therefrom, comparing said weaving patterns with reference weaving patterns previously stored in the module, stopping, with the control unit, rotation of the mandrel if the result of the comparison reveals, in at least one scan window, a difference in appearance between the two weaving patterns that is characteristic of the presence of an anomaly resulting from pollution and/or weaving faults in the fiber preform, and wherein, when an anomaly is recognized, its position on the fiber preform and a label selected by an operator from predetermined types of anomaly are stored together with an image of said anomaly, and when the recognized anomaly is repaired, a corresponding label selected by an operator from predetermined types of repair is stored together with an image of said repair, and the recognized anomalies and the repaired anomalies are displayed in a developed representation or a three-dimensional representation of said fiber preform that is accessible to the operator from said control unit.