公开(公告)号：US20220314468A1

公开(公告)日：2022-10-06

申请号：US17219851

申请日：2021-03-31

Applicant: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Yi-Yuh Hwang ,  Li-Chung Liu

IPC: B25J19/02 ,  B25J13/08 ,  B25J9/16

Abstract: A device for measuring repeated positioning precision of a robotic arm is introduced. Using an optical speckle three-dimensional displacement sensor developed by the inventor, and with collaboration of an optical speckle image three-dimensional positioning base built with an optical speckle coordinate database and having low thermal expansion, an optical speckle three-dimensional absolute positioning space is established. The optical speckle three-dimensional displacement sensor is installed on an end effector of a robotic arm, the robotic arm is moved to have the optical speckle three-dimensional displacement sensor enter an optical speckle three-dimensional absolute positioning space, an optical speckle image of a positioning point is captured and compared with a coordinate optical speckle image in the optical speckle coordinate database, and current three-dimensional absolute positioning coordinates of the end effector of the robotic arm can be obtained.

公开(公告)号：US11442427B2

公开(公告)日：2022-09-13

申请号：US16726915

申请日：2019-12-25

Applicant: National Chung-Shan Institute of Science and Technology

Inventor： Yi-Yuh Hwang ,  Li-Chung Liu

IPC: G05B19/404 ,  B23Q23/00 ,  G01B11/02 ,  G01B11/00 ,  G01B11/24 ,  G01B11/30 ,  B23Q17/24 ,  B23Q17/22 ,  B23Q11/00 ,  G05B19/402 ,  B23Q1/62

Abstract: The present invention provides a planar three-dimensional displacement sensor for a multiaxis machining device. With the measurement of the (planar) three-dimensional displacement sensor in the multiaxis machining device, the multiaxis machining device and a multiaxis machining compensation method are able to eliminate various deformation effects effectively.

公开(公告)号：US10670877B1

公开(公告)日：2020-06-02

申请号：US16224663

申请日：2018-12-18

Applicant: National Chung-Shan Institute of Science and Technology

Inventor： Yi-Yuh Hwang ,  Wei-Kuo Chang ,  Li-Chung Liu

IPC: G02B27/48 ,  G01B11/00 ,  G06F3/03

Abstract: The present invention is to provide a method of precisely comparing and positioning speckle patterns, which calculates light intensities of the speckle patterns, is capable of enhancing positioning accuracy of the speckle patterns, and is applicable to various navigation input devices for various types of notebook computers, multi-function keyboard and TV remote control.

公开(公告)号：US10189133B2

公开(公告)日：2019-01-29

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

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.

公开(公告)号：US11554506B2

公开(公告)日：2023-01-17

申请号：US17219851

申请日：2021-03-31

Applicant: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Yi-Yuh Hwang ,  Li-Chung Liu

IPC: B25J19/02 ,  B25J9/16 ,  B25J13/08

Abstract: A device for measuring repeated positioning precision of a robotic arm is introduced. Using an optical speckle three-dimensional displacement sensor developed by the inventor, and with collaboration of an optical speckle image three-dimensional positioning base built with an optical speckle coordinate database and having low thermal expansion, an optical speckle three-dimensional absolute positioning space is established. The optical speckle three-dimensional displacement sensor is installed on an end effector of a robotic arm, the robotic arm is moved to have the optical speckle three-dimensional displacement sensor enter an optical speckle three-dimensional absolute positioning space, an optical speckle image of a positioning point is captured and compared with a coordinate optical speckle image in the optical speckle coordinate database, and current three-dimensional absolute positioning coordinates of the end effector of the robotic arm can be obtained.

公开(公告)号：US20210200180A1

公开(公告)日：2021-07-01

申请号：US16726915

申请日：2019-12-25

Applicant: National Chung-Shan Institute of Science and Technology

Inventor： Yi-Yuh Hwang ,  Li-Chung Liu

IPC: G05B19/404 ,  B23Q23/00

Abstract: The present invention provides a planar three-dimensional displacement sensor for a multiaxis machining device. With the measurement of the (planar) three-dimensional displacement sensor in the multiaxis machining device, the multiaxis machining device and a multiaxis machining compensation method are able to eliminate various deformation effects effectively.