Patent ID: 7916312

Claim:
A measurement arrangement ( 1 ) for the measurement of a diameter or a width of an object, characterized in that a first joint ( 2 ) is arranged at a first end ( 3 ) of an extended member ( 4 ), around which first end ( 3 ) the measurement arrangement ( 1 ) has a rotation axis (P), in that a second joint ( 5 ) is arranged at the opposing end ( 6 ) of the extended member ( 4 ), in that an equipment ( 11 ) for recording measured points is arranged at the second joint ( 5 ) and connected to it, in that the first joint ( 2 ) and the second joint ( 5 ) are connected through a cord ( 8 ) or a wire, in that the equipment ( 11 ) for recording measured points is arranged to be rotated through a pre-determined angle when the extended member ( 4 ) is turned around its rotation axis (P), in that an angle sensor is arranged at one of the joints in order to record a rotation of the equipment ( 11 ) for recording measured points relative to the extended member ( 4 ), in that the equipment ( 11 ) for recording measured points is arranged to be rotated by means of the cord ( 8 ) or wire through an angle that corresponds to the angle that the extended member ( 4 ) has been turned around its rotation axis (P), in that the equipment ( 11 ) for recording measured points and the extended member ( 4 ) are arranged to be rotated in opposite directions, in that the angles of rotation are recorded when the equipment ( 11 ) for recording measured points detects the limiting surface of the object on both sides of the diameter that is to be measured, and in that a processor is arranged to calculate the diameter based on the said angles of rotation.