CPC G01L 5/24 (2013.01) [B25B 23/1456 (2013.01)] | 14 Claims |
1. A method for determining a tightening class of a tightening operation performed by a tightening tool, the method comprising:
acquiring time-domain representations of sets of observed torque and angle values for fasteners having been tightened by the tightening tool;
acquiring frequency-domain representations of the observed sets of torque values for the fasteners having been tightened by the tightening tool;
associating a tightening class with each acquired time-domain representation of the sets of observed torque and angle values and each acquired frequency-domain representation of the sets of observed torque values, the tightening class identifying a type of tightening operation having been applied to the fasteners;
training a machine-learning model with the acquired time-domain representations of the sets of observed torque and angle values, the acquired frequency-domain representations of the sets of observed torque values and the tightening class associated with each set; and
supplying the trained machine-learning model with a further acquired time-domain representation of a set of observed torque and angle values and a frequency-domain representation of the further set of observed torque values for a fastener having been tightened by the tightening tool, wherein the trained machine-learning model outputs an estimated tightening class for the supplied set of observed torque and angle values.
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