APPARATUS, SYSTEM AND METHOD OF MEASURING THREAD PARAMETERS AT TUBE END Russian patent published in 2012 - IPC G01B21/20 

FIELD: physics.

SUBSTANCE: apparatus, method and system for measuring thread parameters at the end of a tube or a threaded pipe, comprising: an optical sensor which measures a first thread parameter by detecting light from a light source lying on the opposite side of the axis of the tube or pipe, and essentially passes parallel the thread groove; a contact sensor which measures a second thread parameter through contact of contact probe with the thread lateral surface and detection of spatial coordinates of the contact probe during contact; and processor which calculates thread parameters from the combination of the first thread parameter and the second thread parameter. High-precision measurements can be taken even for a thread parameter associated with hook lateral surfaces, which is susceptible to considerable measurement errors when measuring only optically since they are almost completely hidden in the shadow of the thread crest. Using the disclosed system of measuring thread parameters, the height at which a threaded tube is placed can be adjusted using a height adjustment mechanism so that the reference measurement axis of the thread parameter measuring device can be level with the central axis of the threaded tube.

EFFECT: high accuracy of measuring thread parameters associated with thread lateral surfaces.

9 cl, 12 dwg