公开(公告)号：US10379520B2

公开(公告)日：2019-08-13

申请号：US15271824

申请日：2016-09-21

Applicant: Mitutoyo Corporation

Inventor： Takashi Noda ,  Hiromi Deguchi ,  Norihiko Murata

IPC: G01B5/008 ,  G01B7/008 ,  G06F17/16 ,  G05B19/401

Abstract: There is provided a method for controlling a shape measuring apparatus which can achieve both trajectory correcting capability and control stability. A stylus tip is moved along a scanning path while controlling the stylus tip so as to keep an amount of deflection of a probe to a workpiece to be a reference amount of deflection. A movement instruction for the probe is generated according to a combined velocity vector V represented by the following expression: combined velocity vector V=Gf·Vf+Ge·Ve+Gc·Vc2, where Vf is a path velocity vector to move the probe along the scanning path, Ve is a deflection correcting vector to keep the amount of deflection of the probe to the workpiece to be the reference amount of deflection, Vc2 is a second trajectory correcting vector represented by (Vc1·q)q, Vc1 is a first trajectory correcting vector to correct a position of the probe so that the stylus tip heads to the scanning path, and q is a trajectory correcting direction vector given by a vector product of a normal line of a surface of the workpiece and the path velocity vector Vf.

公开(公告)号：US10365630B2

公开(公告)日：2019-07-30

申请号：US15638932

申请日：2017-06-30

Applicant: MITUTOYO CORPORATION

Inventor： Takashi Noda ,  Hiromi Deguchi ,  Norihiko Murata

IPC: G01B21/04 ,  G01B21/20 ,  G01B5/008 ,  G05B19/04 ,  G05B19/401

Abstract: A probe displacement command in a scanning measurement is generated according to a composite speed vector V: V=Gf·Vf+Ge·Ve+sp(p)·Gc·Vc2 wherein Vf is a vector along which a probe is displaced along a scanning path, Ve is a vector maintaining a deflection amount of the probe toward a work piece at a standard deflection amount. Vc2 is represented by (Vc1·q)q, Vc1 is a vector in a direction correcting a probe position such that a stylus tip is oriented along a scanning course, q is a vector given by a vector product of the normal line of a surface of the work piece and Vf, The normal direction of a measured surface is designated as Nw, p is a scalar product of Vc2 and Nw, and sg(p) is a function returning +1 or −1 in accordance with a value of p.

公开(公告)号：US20170090455A1

公开(公告)日：2017-03-30

申请号：US15271824

申请日：2016-09-21

Applicant: Mitutoyo Corporation

Inventor： Takashi Noda ,  Hiromi Deguchi ,  Norihiko Murata

IPC: G05B19/401 ,  G06F17/16 ,  G01B7/008

CPC classification number: G05B19/401 ,  G01B5/008 ,  G01B7/008 ,  G05B2219/23385 ,  G06F17/16

Abstract: There is provided a method for controlling a shape measuring apparatus which can achieve both trajectory correcting capability and control stability. A stylus tip is moved along a scanning path while controlling the stylus tip so as to keep an amount of deflection of a probe to a workpiece to be a reference amount of deflection. A movement instruction for the probe is generated according to a combined velocity vector V represented by the following expression: combined velocity vector V=Gf·Vf+Ge·Ve+Gc·Vc2, where Vf is a path velocity vector to move the probe along the scanning path, Ve is a deflection correcting vector to keep the amount of deflection of the probe to the workpiece to be the reference amount of deflection, Vc2 is a second trajectory correcting vector represented by (Vc1·q)q, Vc1 is a first trajectory correcting vector to correct a position of the probe so that the stylus tip heads to the scanning path, and q is a trajectory correcting direction vector given by a vector product of a normal line of a surface of the workpiece and the path velocity vector Vf.