Invention Grant
- Patent Title: Measurement method and device for thread parameters
- Patent Title (中): 螺纹参数的测量方法和装置
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Application No.: US13131851Application Date: 2009-12-03
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Publication No.: US08682465B2Publication Date: 2014-03-25
- Inventor: Nicolás Hernán Bonadeo , Sebastián Berra , Javier Ignacio Etcheverry
- Applicant: Nicolás Hernán Bonadeo , Sebastián Berra , Javier Ignacio Etcheverry
- Applicant Address: VC Kingstown
- Assignee: Tenaris Connections Limited
- Current Assignee: Tenaris Connections Limited
- Current Assignee Address: VC Kingstown
- Agency: Knobbe, Martens, Olson & Bear, LLP
- Priority: EP08170841 20081205
- International Application: PCT/EP2009/066309 WO 20091203
- International Announcement: WO2010/063792 WO 20100610
- Main IPC: G06F19/00
- IPC: G06F19/00 ; G01B5/08 ; G01B7/12 ; G01B11/08 ; G01B13/08 ; G01B21/10 ; G01B11/24 ; G06K9/00

Abstract:
A measurement method for thread parameters for a threaded object (3), by means of a measurement device (1) defining a spatial reference system (X, Y, Z) incorporating an optical sensor (5) to retrieve the shape of the threaded object, and defining a spatial reference system (X′, Y′, Z′), the measurement device (1) having a computer to assemble a first matrix that describes the quadratic form representing the threaded object in the spatial reference system (X, Y, Z), thus providing the relationship between the two spatial reference systems. The method comprises the steps of: a) predefining at least one trajectory of the at least one optical sensor (5) on the threaded object, along which measurement points are selected such that the matrix evaluated on these values satisfies the condition that it has maximum rank, b) performing a first scanning operation by the at least one optical sensor (5) along said at least one trajectory and retrieving data of the predefined measurement points, c) feeding these data to the first matrix and calculating an axes transformation matrix relating the first spatial reference system with the second spatial reference system for defining the relative position of the threaded object with respect to the second spatial reference system, d) using the axes transformation matrix to convert all data retrieved from the second spatial reference system to the first spatial reference system.
Public/Granted literature
- US20110238199A1 MEASUREMENT METHOD AND DEVICE FOR THREAD PARAMETERS Public/Granted day:2011-09-29
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