DEVICE FOR MEASURING SCREW ELEMENT AT PIPE END, SYSTEM FOR MEASURING SCREW ELEMENT AND METHOD FOR MEASURING SCREW ELEMENT

摘要

A first thread feature is measured by detecting with an optical sensor 2 light that reaches from a light source 21 located on the opposite side of a pipe axis and runs substantially in parallel to thread grooves A4. A contact probe 31 of a contact sensor 3 is contacted with a thread flank surface A8 to detect the space coordinates of the contact probe 31 at the time of contact, so that a second thread feature is measured. The first and second thread features thus detected are combined with each other by a processor 4, and thread features of the thread provided as a measurement object are thereby calculated.