Prof. Zengxiang Zhou Profile

Prof. Zengxiang Zhou

Senior Enigineer at Univ of Science And Technology of China

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Publications (26)

Proceedings Article | 10 July 2018 Paper

Research on active heat dissipation experimental system for focal plate

Lixuan Cheng, Jianping Wang, Houxi He, Zengxiang Zhou, Chao Zhai

Proc. SPIE. 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III

KEYWORDS: Cooling systems, Telescopes, Control systems, Space telescopes, Thermal effects, Convection, Optical instrument design, HVAC controls, Device simulation, Temperature metrology

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Proceedings Article | 10 July 2018 Paper

Comparison of pose error compensation for focal plane pose test platform using GRNN and CART

Qiang Lu, Jianping Wang, Feifan Zhang, Zengxiang Zhou

Proc. SPIE. 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III

KEYWORDS: Mathematical modeling, Data modeling, Sensors, Error analysis, Data acquisition, Space telescopes, Neural networks, Lutetium, Motion models, Statistical modeling

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Proceedings Article | 10 July 2018 Paper

A micro-optical fiber positioner

Hongzhuan Hu, Jianping Wang, Zhigang Liu, Zengqiang Zhou, Chao Zhai, Jiaru Chu

Proc. SPIE. 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III

KEYWORDS: Optical fibers, Telescopes, Optical design, Astronomy, Roads, Spectroscopy, Servomechanisms, Galactic astronomy, Optical mounts, Chaos

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This paper gives a scheme of optical fiber positioner structure of a miniature, by use of the DC servo motor with the diameter of 3mm driver, the distance can designed to 8.5mm, and can arrange more than 12000 fibers in the focal plane with the diameter of 1 meters, it is especially suitable for telescope with small dimension focal plane and has high density fiber positioning requirements. Based on the principle of double rotary fiber positioning principle, It consists of a hollow shaft revolving mechanism, and eccentric axis revolving mechanism relative to hollow shaft. The hollow shaft turns round at the range of -180 degrees to +180 degrees and the eccentric axis turns round at the range of -90 degrees to +90 degrees at the half of radius driving by each control motor. When positioning, the optical fiber end moves on the focal plate throughout, and can never deviate from focal plane. optical fiber is fixed in the mounting hole of fiber support which installed on the eccentric rotary shaft (fiber support’s hole axis is parallel to the axis of the hollow shaft), and fiber will lead to pass through the inner hole of the hollow shaft and focal plate then connected to the spectrometer. positioner center shaft adopts planetary gear driving principle, with small module motor’s gear and the fixed ring gear can driving motor and positioner planetary rotate, the eccentric shaft by DC servo motor with the diameter of 3mm drived coaxial optical fiber on the eccentric shaft, the center and the eccentric shafts adopts micro rolling bearing support; in order to prevent the positioner’s center and eccentric shaft to rotate out of bounds, both limiting devices have designed to ensure the safety of fiber positioning; both center and eccentric shaft are designed with a spring structure to eliminate the influence of gear clearance; because positioner size is very small, the positioner driving wire is embedded in the slot of the hollow shaft sleeve wall. This will not affect the fiber go through the center shaft’s holes and pass through the focal plane; positioner sample test results show that the closed-loop positioning can reached accuracy of 0.01mm unit, and can meet with the demand of optical fiber positioning.

Proceedings Article | 9 July 2018 Paper

The improvement of LAMOST fiber view camera metrology system fiber position recognition algorithm

Kang Zhao, Zhigang Liu, Hongzhuan Hu, Jianping Wang, Chao Zhai, Zengxiang Zhou

Proc. SPIE. 10702, Ground-based and Airborne Instrumentation for Astronomy VII

KEYWORDS: Optical fibers, Metrology, Detection and tracking algorithms, Imaging systems, Cameras, CCD cameras, Stereo vision systems

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Proceedings Article | 9 July 2018 Paper

Stability study of the multi-object photogrammetric platform for optical fiber units

Houxi He, Jianping Wang, Jiaru Chu, Hongzhuan Hu, Zengxiang Zhou, Zhigang Liu

Proc. SPIE. 10702, Ground-based and Airborne Instrumentation for Astronomy VII

KEYWORDS: Optical fibers, Metrology, Imaging systems, Cameras, Magnetism, Control systems, Head, Vibration isolation, Control systems design, Prototyping

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Proceedings Article | 6 July 2018 Paper

The fiber view metrology system design for spectral survey telescope

Kang Zhao, Zhigang Liu, Hongzhuan Hu, Jianping Wang, Chao Zhai, Zengxiang Zhou

Proc. SPIE. 10700, Ground-based and Airborne Telescopes VII

KEYWORDS: Optical fibers, Telescopes, Visualization, Imaging systems, Cameras, Calibration, Image processing, CMOS cameras, Servomechanisms, Optical instrument design

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Proceedings Article | 27 July 2016 Paper

Design and study of the mask exchange system based on Delta parallel mechanism

Feifan Zhang, Jianping Wang, Hongfei Zhou, Zengxiang Zhou, Jiaru Chu

Proc. SPIE. 9906, Ground-based and Airborne Telescopes VI

KEYWORDS: Observatories, Telescopes, Thirty Meter Telescope, Imaging systems, Ions, Space telescopes, System identification, Molybdenum, Optical instrument design, Surface conduction electron emitter displays

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Proceedings Article | 22 July 2016 Paper

A compact optical fiber positioner

Hongzhuan Hu, Jianping Wang, Zhigang Liu, Zengxiang Zhou, Chao Zhai, Jiaru Chu

Proc. SPIE. 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II

KEYWORDS: Optical fibers, Telescopes, Optical design, Astronomy, Safety, Stars, Spectroscopy, Structured optical fibers, Control systems, Galactic astronomy

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Proceedings Article | 22 July 2016 Paper

Back-illuminate fiber system research for multi-object fiber spectroscopic telescope

Zengxiang Zhou, Zhigang Liu, Hongzhuan Hu, Jianping Wang, Chao Zhai, Jiaru Chu

Proc. SPIE. 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II

KEYWORDS: Optical fibers, Telescopes, Spectrographs, Light sources, Light emitting diodes, Spectroscopy, CCD cameras, Light sources and illumination, Integrating spheres, Back illuminated sensors

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In the telescope observation, the position of fiber will highly influence the spectra efficient input in the fiber to the spectrograph. When the fibers were back illuminated on the spectra end, they would export light on the positioner end, so the CCD cameras could capture the photo of fiber tip position covered the focal plane, calculates the precise position information by light centroid method and feeds back to control system. A set of fiber back illuminated system was developed which combined to the low revolution spectro instruments in LAMOST. It could provide uniform light output to the fibers, meet the requirements for the CCD camera measurement. The paper was introduced the back illuminated system design and different test for the light resource. After optimization, the effect illuminated system could compare with the integrating sphere, meet the conditions of fiber position measurement.Using parallel controlled fiber positioner as the spectroscopic receiver is an efficiency observation system for spectra survey, has been used in LAMOST recently, and will be proposed in CFHT and rebuilt telescope Mayall. In the telescope observation, the position of fiber will highly influence the spectra efficient input in the fiber to the spectrograph. When the fibers were back illuminated on the spectra end, they would export light on the positioner end, so the CCD cameras could capture the photo of fiber tip position covered the focal plane, calculates the precise position information by light centroid method and feeds back to control system. After many years on these research, the back illuminated fiber measurement was the best method to acquire the precision position of fibers. In LAMOST, a set of fiber back illuminated system was developed which combined to the low revolution spectro instruments in LAMOST. It could provide uniform light output to the fibers, meet the requirements for the CCD camera measurement and was controlled by high-level observation system which could shut down during the telescope observation. The paper was introduced the back illuminated system design and different test for the light resource. After optimization, the effect illuminated system could compare the integrating sphere, meet the conditions of fiber position measurement.

Proceedings Article | 22 July 2016 Paper

Research and implementation of the integrated cooling system for focal plate

Jianping Wang, Lixuan Cheng, Jiaru Chu, Hongzhuan Hu, Zengxiang Zhou

Proc. SPIE. 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II

KEYWORDS: Cooling systems, Telescopes, Composites, Power supplies, Control systems, 3D modeling, Space telescopes, Finite element methods, Convection, Temperature metrology

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Proceedings Article | 22 July 2016 Paper

Error compensation research on the focal plane attitude measurement instrument

Hongfei Zhou, Feifan Zhang, Chao Zhai, Zengxiang Zhou, Zhigang Liu, Jianping Wang

Proc. SPIE. 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II

KEYWORDS: Aerospace engineering, Sensors, Error analysis, Space telescopes, Neural networks, Astronomical telescopes, Servomechanisms, Signal detection, Neurons, Motion controllers

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Proceedings Article | 8 October 2015 Paper

Serial robot for the trajectory optimization and error compensation of TMT mask exchange system

Jianping Wang, Feifan Zhang, Zengxiang Zhou, Chao Zhai

Proc. SPIE. 9678, AOPC 2015: Telescope and Space Optical Instrumentation

KEYWORDS: SolidWorks, Telescopes, MATLAB, Thirty Meter Telescope, Imaging systems, Space telescopes, Photomasks, Analytical research, Device simulation, Space robots

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Proceedings Article | 8 October 2015 Paper

Conceptual design of a hybrid parallel mechanism for mask exchanging of TMT

Jianping Wang, Hongfei Zhou, Kexuan Li, Zengxiang Zhou, Chao Zhai

Proc. SPIE. 9678, AOPC 2015: Telescope and Space Optical Instrumentation

KEYWORDS: Mathematical modeling, SolidWorks, Aerospace engineering, Thirty Meter Telescope, Imaging systems, Kinematics, Space telescopes, Analytical research, Dynamical systems, Systems modeling

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Proceedings Article | 19 August 2014 Paper

Research of fiber position measurement by multi CCD cameras

Zengxiang Zhou, Hongzhuan Hu, Jianping Wang, Chao Zhai, Jiaru Chu, Zhigang Liu

Proc. SPIE. 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation

KEYWORDS: Optical fibers, Telescopes, MATLAB, Imaging systems, Cameras, Image processing, Robotics, Control systems, CCD cameras, Prototyping

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Proceedings Article | 28 July 2014 Paper

Accuracy research for survey telescope fiber position measurement

Zengxiang Zhou, Zhigang Liu, Hongzhuan Hu, Jianping Wang, Chao Zhai, Jiaru Chu

Proc. SPIE. 9147, Ground-based and Airborne Instrumentation for Astronomy V

KEYWORDS: Target detection, Telescopes, Stars, Cameras, Photography, Robotics, 3D modeling, Photogrammetry, 3D metrology, Galactic astronomy

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Proceedings Article | 18 July 2014 Paper

A high-density integrated optical focal plane positioning system

Hongzhuan Hu, Jianping Wang, Zhigang Liu, Zengxiang Zhou, Chao Zhai, Jiaru Chu

Proc. SPIE. 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation

KEYWORDS: Optical fibers, Telescopes, Prisms, Roads, Ceramics, Numerical simulations, Structured optical fibers, Integrated optics, Astronomical telescopes, Optical instrument design

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Proceedings Article | 18 July 2014 Paper

Mechanical design and analysis of focal plate for gravity deformation

Jianping Wang, Jiaru Chu, Hongzhuan Hu, Kexuan Li, Zengxiang Zhou

Proc. SPIE. 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation

KEYWORDS: Mathematical modeling, Optical fibers, Telescopes, MATLAB, Astronomy, Aerospace engineering, Space telescopes, Aluminum, Astronomical telescopes, Mechanical engineering

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Proceedings Article | 24 September 2012 Paper

The measuring apparatus research for BigBOSS fiber-positioner

Zengxiang Zhou, Michael Sholl, Christoph Schenk, Joe Silber, Chris Bebek, Chao Zhai

Proc. SPIE. 8446, Ground-based and Airborne Instrumentation for Astronomy IV

KEYWORDS: Actuators, MATLAB, Imaging systems, Cameras, Calibration, Image processing, Distortion, Kinematics, CCD cameras, Charge-coupled devices

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Proceedings Article | 23 July 2010 Paper

The calibration and evaluation for laser tracker application in LAMOST site environment

Zeng-xiang Zhou, Yi Jin, Chao Zhai, Yong-gang Gu

Proc. SPIE. 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation

KEYWORDS: Reflectors, Mirrors, Interferometers, Calibration, Manufacturing, Distance measurement, 3D metrology, Laser stabilization, Environmental sensing, Laser systems engineering

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Proceedings Article | 19 July 2010 Paper

Zigbee networking technology and its application in Lamost optical fiber positioning and control system

Yi Jin, Chao Zhai, Yonggang Gu, Zengxiang Zhou, Xiaofeng Gai

Proc. SPIE. 7740, Software and Cyberinfrastructure for Astronomy

KEYWORDS: Optical fibers, Telescopes, Stars, Control systems, Data transmission, Space telescopes, Astronomical imaging, Wireless communications, Data communications, Standards development

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Proceedings Article | 1 October 2009 Paper

Study on the distortion prediction of focal plate

Jianping Wang, Jiaru Chu, Hongzhuan Hu, Xiaofeng Li, Zengxiang Zhou

Proc. SPIE. 7427, Optical Modeling and Performance Predictions IV

KEYWORDS: Optical fibers, Mirrors, Optical spheres, Metals, Distortion, 3D modeling, Finite element methods, Aluminum, Chemical elements, Spherical lenses

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Proceedings Article | 18 July 2008 Paper

High precise measurement of tiny angle dimensional holes for the unit-holes of the LAMOST Focal Plane Plate

Zengxiang Zhou, Yi Jin, Chao Zhai, Xiaozheng Xing

Proc. SPIE. 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation

KEYWORDS: Optical fibers, Telescopes, Optical spheres, Calibration, Error analysis, Manufacturing, Precision measurement, Tolerancing, Assembly tolerances, Chaos

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Proceedings Article | 11 July 2008 Paper

A new measurement method of profile tolerance for the LAMOST focal plane

Zengxiang Zhou, Yi Jin, Chao Zhai, Xiaozheng Xing

Proc. SPIE. 7014, Ground-based and Airborne Instrumentation for Astronomy II

KEYWORDS: Optical fibers, Telescopes, Astronomy, Optical spheres, Manufacturing, Time metrology, Space telescopes, Spherical lenses, Tolerancing, Assembly tolerances

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Proceedings Article | 11 July 2008 Paper

The testing scheme for the LAMOST focal plane plate

Zengxiang Zhou, Yi Jin, Jianping Wang, Xiaofeng Li, Xiaozheng Xing

Proc. SPIE. 7014, Ground-based and Airborne Instrumentation for Astronomy II

KEYWORDS: Telescopes, Astronomy, Optical spheres, Calibration, Manufacturing, Inspection, Distance measurement, Astronomical telescopes, Spherical lenses, Tolerancing

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Proceedings Article | 11 July 2008 Paper

Study on measurement error of fiber space coordinate detection using an area CCD camera for the LAMOST positioning system

Yi Jin, Xiaozheng Xing, Chao Zhai, Zengxiang Zhou

Proc. SPIE. 7014, Ground-based and Airborne Instrumentation for Astronomy II

KEYWORDS: Optical fibers, Imaging systems, Speckle, Error analysis, CCD cameras, Photogrammetry, Distance measurement, Light sources and illumination, Charge-coupled devices, Speckle imaging

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Proceedings Article | 28 June 2006 Paper

The measurement of profile tolerance for the small focal plane plate of LAMOST

Zengxiang Zhou, Chao Zhai, Xiaozheng Xing, Hongzhuan Hu

Proc. SPIE. 6269, Ground-based and Airborne Instrumentation for Astronomy

KEYWORDS: Optical fibers, Telescopes, Astronomy, Roads, Optical spheres, Imaging systems, Spectroscopy, Reflector telescopes, Spherical lenses, Tolerancing

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Showing 5 of 26 publications

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