Patent ID: 8855965
Filing Date: 2014-10-07
Classification: G01B

Abstract:
1. A measurement device for measuring thread parameters of a threaded object, comprising: one or more position sensors configured to determine a shape of the threaded object in a first spatial reference system with first co-ordinate axes (X, Y, Z), the threaded object defining a second spatial reference system comprising second co-ordinate axes (X′, Y′, Z′), a mechanical moving system, wherein said one or more sensors are mounted on the mechanical moving system, the mechanical moving system configured to guide the one or more sensors during determination of the shape of the threaded object along a selected trajectory including selected measurement points, wherein the measurement points are selected such that a matrix describing a quadratic form has maximum rank when values corresponding to these measurement points are inserted in the matrix; a mechanism configured to synchronize output signals of the one or more sensors with spatial positions of the mechanical moving system; a computing device configured to control the one or more sensors during determination of the shape of the threaded object; and an electronic circuit connecting the computing device to the mechanical moving system and to the one or more sensors.