Real-time surface shape measurement by an active interferometer

1997 ◽  
Vol 4 (1) ◽  
pp. A216-A220 ◽  
Author(s):  
Ji-Yuan Liu ◽  
Ichirou Yamaguchi ◽  
Jun-ichi Kato ◽  
Toshinori Nakajima
Keyword(s):  
Real Time ◽  
Surface Shape ◽  
Shape Measurement ◽  
Active Interferometer

Real-time surface shape measurement by an active interferometer

1997 ◽  
Vol 4 (1) ◽  
pp. 216-220 ◽  
Author(s):  
Ji-Yuan Liu ◽  
Ichirou Yamaguchi ◽  
Jun-ichi Kato ◽  
Toshinori Nakajima
Keyword(s):  
Real Time ◽  
Surface Shape ◽  
Shape Measurement ◽  
Active Interferometer

Wavelength scanning profilometry for real-time surface shape measurement

1997 ◽  
Vol 36 (19) ◽  
pp. 4473 ◽  
Author(s):  
Susumu Kuwamura ◽  
Ichirou Yamaguchi
Keyword(s):  
Real Time ◽  
Surface Shape ◽  
Shape Measurement ◽  
Wavelength Scanning

scholarly journals Real-time motion-induced-error compensation in 3D surface-shape measurement

2019 ◽  
Vol 27 (18) ◽  
pp. 25265 ◽  
Author(s):  
Xinran Liu ◽  
Tianyang Tao ◽  
Yingying Wan ◽  
Jonathan Kofman
Keyword(s):  
Real Time ◽  
Error Compensation ◽  
Surface Shape ◽  
Shape Measurement ◽  
Time Motion ◽  
3D Surface

New Method for Surface Shape Measurement Based on Brox Optical Flow Algorithm

2020 ◽  
Vol 40 (17) ◽  
pp. 1712004
Author(s):  
唐钰欣 Tang Yuxin ◽  
孙平 Sun Ping ◽  
代晴 Dai Qing ◽  
范超 Fan Chao ◽  
类智方 Lei Zhifang
Keyword(s):  
Optical Flow ◽  
Surface Shape ◽  
New Method ◽  
Shape Measurement ◽  
Flow Algorithm

scholarly journals High-speed real-time 3D shape measurement based on adaptive depth constraint

2018 ◽  
Vol 26 (17) ◽  
pp. 22440 ◽  
Author(s):  
Tianyang Tao ◽  
Qian Chen ◽  
Shijie Feng ◽  
Jiaming Qian ◽  
Yan Hu ◽  
...  
Keyword(s):  
Real Time ◽  
High Speed ◽  
Shape Measurement ◽  
3D Shape ◽  
3D Shape Measurement

Position-based impedance force controller with sensorless force estimation

2019 ◽  
Vol 39 (3) ◽  
pp. 489-496 ◽  
Author(s):  
Jianjun Yuan ◽  
Yingjie Qian ◽  
Liming Gao ◽  
Zhaohan Yuan ◽  
Weiwei Wan
Keyword(s):  
Real Time ◽  
External Force ◽  
Force Control ◽  
Impedance Control ◽  
Surface Shape ◽  
Force Estimation ◽  
Shape Information ◽  
Content Type ◽  
Generalized Inverse Matrix ◽  
Surface Prediction

Purpose This paper aims to purpose an improved sensorless position-based force controller in gravitational direction for applications including polishing, milling and deburring. Design/methodology/approach The first issue is the external force/torque estimation at end-effector. By using motor’s current information and Moore-Penrose generalized inverse matrix, it can be derived from the external torques of every joints for nonsingular cases. The second issue is the force control strategy which is based on position-based impedance control model. Two novel improvements were made to achieve a better performance. One is combination of impedance control and explicit force control. The other one is the real-time prediction of the surface’s shape allowing the controller adaptive to arbitrary surfaces. Findings The result of validation experiments indicates that the estimation of external force and prediction of surface’s shape are credible, and the position-based constant contact force controller in gravitational direction is functional. The accuracy of force tracking is adequate for targeted applications such as polishing, deburring and milling. Originality/value The value of this paper lies in three aspects which are sensorless external force estimation, the combination of impedance control and explicit force control and the independence of surface shape information achieved by real-time surface prediction.

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