中国科学院机构知识库网格系统: 检索

Robotic grasping and assembly of screws based on visual servoing using point features 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, 2023, 页码: 13
作者: Hao, Tiantian; Xu, De

|

收藏 | 浏览/下载：19/0 | 提交时间：2023/12/21

Feature extraction Image-based visual servoing Position alignment Robotic grasping Robotic assembly

Image-Based Visual Servoing for Position Alignment With Orthogonal Binocular Vision 期刊论文 OAI收割
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 2023, 卷号: 72, 页码: 10
作者: Hao, Tiantian; Xu, De; Qin, Fangbo

|

收藏 | 浏览/下载：12/0 | 提交时间：2023/11/17

Binocular vision image-based visual servoing (IBVS) control interaction matrix position alignment sensitivity for motion

Robotic Grasping and Alignment for Small Size Components Assembly Based on Visual Servoing 期刊论文 OAI收割
International Journal of Advanced Manufacturing Technology., 2020, 卷号: 2020, 期号: 106, 页码: 4827-4843
作者: Yanqin Ma; Xilong Liu; Juan Zhang; De Xu; Dapeng Zhang

|

收藏 | 浏览/下载：16/0 | 提交时间：2020/06/10

Grasping Alignment Monocular vision guidance Position offset compensation Visual servoing Robotic assembly

Automatic precise alignment of Sagnac interferometer 会议论文 OAI收割
Nanjing, PEOPLES R CHINA, 2017-10-24
作者: Li Tian-yue; Zhang Xue-min; Song Xing; Zhang, XM (reprint author), Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Shaanxi, Peoples R China.

|

收藏 | 浏览/下载：28/0 | 提交时间：2018/07/05

Spectrology Precise Alignment Sagnac Interferometer Position Accuracy Angle Accuracy

Alignment of beam position monitors in cryomodule of CADS injector II 期刊论文 OAI收割
NUCLEAR SCIENCE AND TECHNIQUES, 2017, 卷号: 28, 页码: 6
作者: Yuan, Jian-Dong; He, Yuan; Zhang, Bin; Zhang, Jun-Hui; Wu, Jun-Xia

|

收藏 | 浏览/下载：25/0 | 提交时间：2018/05/31

Beam position monitors Alignment Fourier's Law Cryomodule CADS ANSYS

Alignment of ADS beta cryostat with wire position monitor 期刊论文 OAI收割
NUCLEAR SCIENCE AND TECHNIQUES, 2015, 卷号: 26, 期号: 4, 页码: 51-56
作者: Zhu HY(朱洪岩); Dong L(董岚); Men LL(门玲鸰); Liu C(刘粲); Li B(李波)

收藏 | 浏览/下载：34/0 | 提交时间：2016/04/18

Wire position monitor Alignment of cryostat Wire position monitor calibration

Predicting Protein N-Terminal Signal Peptides Using Position-Specific Amino Acid Propensities and Conditional Random Fields 期刊论文 OAI收割
CURRENT BIOINFORMATICS, 2013, 卷号: 8, 期号: 2, 页码: 183-192
作者: Fan, Yong-Xian; Song, Jiangning; Xu, Chen; Shen, Hong-Bin

收藏 | 浏览/下载：16/0 | 提交时间：2016/06/22

Conditional random fields (CRFs) hydrophobicity alignment position-specific amino acid propensities secretory protein signal peptide

CONTROL SYSTEM DESIGN OF INSERTING MACHINE AND ITS HIGH PRECISION ALIGNMENT 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF INNOVATIVE COMPUTING INFORMATION AND CONTROL, 2010, 卷号: 6, 期号: 4, 页码: 1595-1604
作者: Yang, Ping; Xu, De

收藏 | 浏览/下载：20/0 | 提交时间：2015/08/12

Motion control Position correction Alignment Control system Inserting machine

Design and fabrication of CGH for aspheric surface testing and its experimental comparison with null lens (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China
作者: Zhao J.; Zhang X.; Zhang X.; Zhang X.; Li F.

收藏 | 浏览/下载：33/0 | 提交时间：2013/03/25

Computer-generated hologram (CGH) is an effective way to compensate wavefront in null test of aspheric surfaces and freeform surfaces. Our strategies of CGH design and fabrication for optical testing are presented and an experiment demonstrating the compensation results of CGH and null lens is also reported. In order to design complex CGH software was developed with which we can design a CGH including three sections: main section for compensating wavefront in null test alignment section for adjusting the relative position between CGH and interferometer and fiducial section for projecting fiducial marks around the optics under test. The design result is represented in GDS II format file which could drive a laser-direct-writer- machine to fabricate a photomask. Then a 1:1 replication process is applied to duplicate the patterns from photomask to a parallel optical substrate whose surface is error better than /60 rms. Finally an off-axis aspheric surface was tested with CGH and null lens respectively. The test result with CGH (0.019rms) is almost the same as the result with null lens (0.020 rms). This experiment also demonstrated that fiducial marks projected by CGH can be used to guide the alignment of the optics and measurement of its off-axis distance. 2010 Copyright SPIE - The International Society for Optical Engineering.

The effect on tolerance distributing of an off-axis three mirror anastigmatic optical system with wavefront coding technology (EI CONFERENCE) 会议论文 OAI收割
Optical System Alignment and Tolerancing II, August 10, 2008 - August 11, 2008, San Diego, CA, United states
作者: Yan F.; Zhang X.-J.; Yan F.

收藏 | 浏览/下载：34/0 | 提交时间：2013/03/25

The wavefront coding technology is known as a system-level technology which can extend the depth of focus of optical system by innovative optical design and image restoration. This technology can control misfocus related aberrations including misfocus astigmatism and Petzval curvature temperature-related misfocus in digital imaging systems. It can also help optical system tolerate more residual error in optical manufacturing and alignment besides misfocus. The brief introduction of wavefront coding technology and the wavefront coded TMA system under research is presented respectively in part 1 and part 2. The "MTF similarity" is defined to describe the relationship among MTF at different position or different fields in the third part. It is also shown in this part that the MTF similarity of wavefront coded system is much higher than the normal system within a large range. In part 4 comparison between the origin system and the new system with wavefront coding technology is provided after multiple errors are introduced from which it can be observed that the system with wavefront coding technology can tolerate much bigger error than origin system. The error tolerance is re-distributed according to a new criterion based on MTF similarity. If the MTF similarity is less than a certain value it can be regarded that the system can tolerate the residual error. The new error tolerance is displayed and it is shown that the wavefront coding technology can also loosen the error distributing besides extended the depth of focus.