Patent ID: 6966120

Claim:
Process for determining the alignment of a cylindrical body with respect to a reference direction by means of a measurement device having a first attachment area and a second attachmcnt area and a position measurement probe calibrated relative to the reference direction and which is capable of detecting a first angle of rotation of the probe around a first axis which is fixed in space and is capable of detecting a second angle of rotation of the probe around a second axis fixed in space, comprising the steps of: performing a first measurement in which the probe is located with the first attachment area and the second attachment area on a peripheral surface of the body, wherein the first attachment area is a first measurement position which is held stationary with respect to the peripheral surface of the body and wherein, at the second attachment area, the probe is angularly displaced relative to the first attachment area into contact with the peripheral surface of the body; detecting, during the angular displacement the characteristic of the first angle and the second angle of rotation; performing a second measurement in which the probe is attached with the first attachment area and the second attachment area on another part of the peripheral surface of the body which is offset in a peripheral direction from the area on the peripheral surface of the body on which the probe is located during the first measurement, wherein the first attachment area is held stationary with respect to the peripheral surface of the body and wherein, at the second attachment area, the probe is angularly displaced relative to the first attachment area into contact with the peripheral surface of the body, detecting, during the angular displacement, the characteristic of the first angle and the second angle of rotation, performing a comparison of the characteristic of the first angle and second angle of rotation from the first measurement with the characteristic of the first angle and second angle of rotation from the second measurement, and determining the alignment of the body, as result of the comparison, with respect to the reference direction.