Controlling the quality of welding cord produced by a tool, comprises collecting a signal representing fusion temperature of portion of welding cordon, and treating and analyzing the signal to identify possible defects in the welding cord

摘要

The process for controlling the quality of welding cord produced by a tool (12), comprises collecting a signal representing a fusion temperature of a portion of welding cordon using an optical pyrometer having a sensor at high frequency of acquisition, treating and analyzing the signal to identify the possible defects in the welding cord, and locating a defect zone by calculating the temperature of the signal. The treatment and analysis step includes a frequency phase to raise a relevant recurrent frequency of the signal using mathematical tools. The process for controlling the quality of welding cord produced by a tool (12), comprises collecting a signal representing a fusion temperature of a portion of welding cordon using an optical pyrometer having a sensor at high frequency of acquisition, treating and analyzing the signal to identify the possible defects in the welding cord, and locating a defect zone by calculating the temperature of the signal. The treatment and analysis step includes: a frequency phase to raise a relevant recurrent frequency of the signal using mathematical tools and to verify whether the recurrent frequencies are same as reference frequencies; a phase amplitude to calculate the average amplitude of all or part of the signal and to verify whether the average amplitude is same as reference amplitude; a phase temperature to calculate the average temperature of all or part of the signal and to verify whether the average temperature is same as reference temperature; and a phase extremum to verify whether all or part of the signal is comprised in an area of reference extremum temperature. The reference area has a maximum temperature and a minimum temperature. An independent claim is included for a device for controlling the quality of welding cord produced by a tool.