Dr. Jinling Chen Profile

Dr. Jinling Chen

at Institute of Optics and Electronics CAS

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Publications (4)

Proceedings Article | 27 November 2007 Paper

Approach using sparse bundle adjustment for system calibration of fringe projective 3D profile sensor

Jian Luo, Jiahu Yuan, Jinling Chen, Ai Xiong

Proceedings Volume 6723, 672331 (2007) https://doi.org/10.1117/12.783382

KEYWORDS: Calibration, Cameras, Projection systems, 3D modeling, Sensors, Imaging systems, Stereoscopic cameras, 3D acquisition, Distortion, Model-based design

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Proceedings Article | 19 November 2007 Paper

Echo signal processing of laser rapid scanning based on wavelet transform

Jinling Chen, Zhengfeng Xu, Delin Xie, Hongbin Chen, Jian Luo

Proceedings Volume 6724, 67240R (2007) https://doi.org/10.1117/12.782686

KEYWORDS: Target detection, Signal detection, Wavelet transforms, Laser energy, Wavelets, Edge detection, Signal processing, Laser scanners, Laser systems engineering, Optical filters

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Proceedings Article | 14 November 2007 Paper

Analysis for dynamics decoupling of photoelectric tracking system with collimated axis eccentricity

Zhengfeng Xu, Jinling Chen, Hongbin Chen, Tao Tang

Proceedings Volume 6722, 67221K (2007) https://doi.org/10.1117/12.783008

KEYWORDS: Control systems, Complex systems, Collimation, Differential equations, Device simulation, Nonlinear control, Kinematics, MATLAB, Simulink, Mathematical modeling

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The horizontal or X-Y tracking gimbal of photoelectric system has spatial blind region because of themselves framework limit, In order to solve the problem of blind region and also track object with high-precision and speediness, a new three-axis photoelectric theodolite system with collimation axis eccentricity is brought forward, It can achieve large-scale space tracking by means of mutual conversion of tracking modes. There is dynamics and inertia coupling in the three-axis photoelectric tracking system, the kind of coupling will directly affect the static state, dynamic state characteristics and indeed system stability. To get high performance photoelectric tracking system, dynamics coupling must be took into account in three-axis photoelectric tracking system. The matrix transformation of angle velocity and moment can be derived from the reference frame relation of three-axis photoelectric tracking system with collimation axis eccentricity; the kinematics property is analyzed by momentum theorem and angular momentum theorem. Through the analysis of inertia coupling in axes, their object differential equation is gained. In the last, the system nonlinear coupling dynamics model is built using multi-body system theory and Lagrange-Eula equation. From the analysis of dynamic equation, it is evident that the photoelectric tracking system with three input and three output contain complicated nonlinear coupling factor, the study of decoupling control must be carried through in order to get high-precision control system. By importing the geometry coordinate transformation, dynamic compensation and nonlinear state feedback, the nonlinear factor can get accurate elimination on base of the system reversibility of input and output, the three-axis photoelectric tracking system control differential equation can be got nonlinear decoupling by static state feedback, several variable photoelectric tracking system turn into three respective self-governed singularity input and output control system to achieve state or output tracking control. The coupling and decoupling control system is respectively simulated using MATLAB's simulink toolbox. Simulation results have proved that the decoupling control method proposed and the decoupling controller designed for system are effective.

Proceedings Article | 19 May 2006 Paper

Signal processing schemes for optical voltage transducer

Jinling Chen, Delin Xie, Hongbin Chen, Latang Xie, Jianhe Song, Xiaoni Luo

Proceedings Volume 6150, 61502D (2006) https://doi.org/10.1117/12.676888

KEYWORDS: Crystals, Transducers, Signal processing, Optical fibers, Sensors, Modulation, Polarizers, Electro optics, Refractive index, Birefringence

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This paper describes an optical voltage transducer(OVT) for a 35kV system based on Pockels effect in a BGO(Bi₄Ge₃O₁₂) crystal. OVT used to measure the voltage of power are superior to conventional electromagnet-induced voltage transducer in many aspects, thus it has great potential to applications. It has some advantages. These advantages are: 1)Optics provides total galvanic separation between the measuring point at high voltage (HV) potential and the measuring equipment at ground potential. 2)Transmission of measuring signals in optical fibers is immune to induced electromagnetic noise even in EMI-environment of switchyards and other high voltage installations. 3)Optics and especially optical fibers make the insulation costs independent of voltage levels thus giving an economical advantage at voltage levels above 100kV. 4)The use of optics is expected to reduce the weight of the transducers. 5)Optical transducers are expected to have a large bandwidth than conventional transducers. 6)The output-signals from an optical transducer are easily interfaced with computers and electronically operated equipment such as digital relays. New techniques developed in electronics and optical field including fiber optic technology bring new contributions to the measurement of voltage and electric field. A Pockels voltage sensor has been widely introduced to electrical power transmission and distribution systems and some advantage of the optical voltage measuring techniques are reported. In this paper, a brief summary of electro-optic effects and the principle of OVT is proposed. The signal processing schemes of different optical path and features are analyzed. The basic principle of OVT is to modulate the irradiance of the light-directed to OVT by an optical fiber-according to the potential difference between the HV-line and the ground potential. The modulation of the light is accomplished by placing a material-that has an optical property (the birefringence), which is sensitive to the electrical field strength (Pockels effect)-inside the OVT.

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