公开(公告)号：US20190193271A1

公开(公告)日：2019-06-27

申请号：US15854896

申请日：2017-12-27

Applicant: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： YI-YUH HWANG ,  WEI-GUO CHANG ,  LI-CHUNG LIU

IPC: B25J9/16 ,  G06K9/78 ,  G06T7/73 ,  G06K9/62 ,  H04N7/18 ,  G06K9/20 ,  G06T7/00

CPC classification number: B25J9/1697 ,  G06K9/209 ,  G06K9/6202 ,  G06K9/78 ,  G06T7/001 ,  G06T7/74 ,  G06T2207/30164 ,  H04N7/181 ,  Y10S901/09 ,  Y10S901/47

Abstract: An error compensation device comprises at least one photographing module, a comparison module and a compensation module compensation module. The photographing module establish a space coordinate system relative to the object and comprises a first photographer and a second photographer which respectively photograph a first non-deformed laser speckle image on a first surface and a second non-deformed laser speckle image on a second surface, the first surface differs from the second surface by an azimuth. The comparison module respectively compares the first non-deformed laser speckle image before and after the displacement with the second non-deformed laser speckle image to calculate a displacement value between the two surfaces. The compensation module controls the movement of the object according to the displacement value. The error compensation utilizes the displacement of the non-deformed laser speckle image to obtain the absolute error of the object and compensate the error.

公开(公告)号：US20180178339A1

公开(公告)日：2018-06-28

申请号：US15388496

申请日：2016-12-22

Applicant: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： YI-YUH HWANG ,  WEI-GUO CHANG ,  LI-CHUNG LIU

IPC: B23Q11/00 ,  B23Q17/24 ,  G01B11/00 ,  G05B19/402

CPC classification number: B23Q11/0007 ,  B23Q17/2428 ,  B23Q17/2495 ,  G01B11/002 ,  G05B19/402 ,  G05B2219/37582

Abstract: A measurement, calibration and compensation system for machine tool includes a first positioning base; two first speckle image sensors for sensing speckle positions of an object holding unit at a first XY plane and a first XZ plane of the first positioning base before and after the machine tool is started for machining; a second positioning base; two second speckle image sensors for sensing speckle positions of a cutter holding unit at a second XY plane and a second YZ plane of the second positioning base before and after the machine tool is started for machining. Thus, the thermal expansion at all axes of the machine tool can be measured in a simplified and low-cost way, and the absolute positioning coordinates of all axes of the machine tool can be calibrated in real time to avoid reduced positioning accuracy due to the thermal expansion of the multi-axis machine tool.