Journals >Electro-Optic Technology Application
Contents
2010
Volume: 25 Issue 2
22 Article(s)
Export citation format
Research Article
[in Chinese]
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 1 (2010)
Application of Fiber Bragg Grating to Monitor Ice on Power Transmission Line
XUE Neng, CAO Yue-xia, YANG Bin-bin, and ZHAO Xun-jie
Starting from the principles and characteristics of fiber Bragg grating(FBG), the possibility to monitor the ice on power transmission line by using FBG sensors was experimentally and theoretically analyzed. The one-side and two-side simple supported beams were established, the relation between reflected wavelength of Starting from the principles and characteristics of fiber Bragg grating(FBG), the possibility to monitor the ice on power transmission line by using FBG sensors was experimentally and theoretically analyzed. The one-side and two-side simple supported beams were established, the relation between reflected wavelength of FBG and the loading on beams was studied. Then the experimental data was fitted by using least squares and thus the mathematical relation between wavelength offset and the loading on beams were obtained. The result shows that it is practical to monitor the weight of ice on power transmission line by FBG sensors..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 1 (2010)
Frequency Characteristic Test and Data Analysis of Optoelectronic Tracking System
SHU Xiao-fang, WU Zhuo-kun, and FENG Hai-qing
The composing and controlling diagram block of the optoelectronic tracking system were analyzed，and every part of velocity stabilization loop was modeled. Through the open-loop frequency characteristic test of the gimbal, the actual frequency characteristic curve of the tracking system was plotted. By using total leastThe composing and controlling diagram block of the optoelectronic tracking system were analyzed，and every part of velocity stabilization loop was modeled. Through the open-loop frequency characteristic test of the gimbal, the actual frequency characteristic curve of the tracking system was plotted. By using total least square algorithm on testing data to approach curve, the mathematics model of the controlled object was built. Comparing with the actual frequency characteristic curve, the model has made good coherence..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 5 (2010)
Laser Interaction with Polymers and Its Applications
LI Yang-long, and WANG Wei-Ping
Research of laser interaction with polymers attracts more and more attention. Applications of interaction of laser and polymers are reviewed, including laser machining, laser beams control in liquid crystal optical elements, and micro laser plasma thruster. The theory of laser interaction with polymers is introduced, aResearch of laser interaction with polymers attracts more and more attention. Applications of interaction of laser and polymers are reviewed, including laser machining, laser beams control in liquid crystal optical elements, and micro laser plasma thruster. The theory of laser interaction with polymers is introduced, and the ablation models are summarized, including photochemical model, photothermal model, steady-state model, plume shielding model and photothermal-photochemical model. The experimental results of etching rate, ablation threshold and disassociation principle are summarized. The possible research and new applications of laser interaction with polymers are put forward..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 8 (2010)
Laser Detection Technique Based on CPLD and DSPYAO
Long-hai, YE Qing, QIU Lin, and SHEN Chao
On the basis of a comparative analysis of the advantages and disadvantages of three types of existing laser detection technology, the relative matured non-imaging spectrum recognition technology was chosen to enhance the effect-cost ratio. CPLD and DSP were applied in the signal processing chips, together with compilinOn the basis of a comparative analysis of the advantages and disadvantages of three types of existing laser detection technology, the relative matured non-imaging spectrum recognition technology was chosen to enhance the effect-cost ratio. CPLD and DSP were applied in the signal processing chips, together with compiling of corresponding software algorithm. The 10-path dual-channel optical system can execute a 360-degree detection at the wavebands of 1.06 μm and 1.54 μm. The binary-related detection technology is utilized to maximize detection probability and to minimize false alarm probability..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 14 (2010)
Application of Laser Diode in Optical Soliton Communications
YIN Qing-lin, WANG Ling, and XU Da-wei
The characteristics of the light source in fiber optic communications were analyzed. According to the coherence of light, the principle, structure , performance and coupling efficiency of the light-emitting diode(LED) and laser diode(LD) were compared, so that the characteristics of laser diode were obtained, and that The characteristics of the light source in fiber optic communications were analyzed. According to the coherence of light, the principle, structure , performance and coupling efficiency of the light-emitting diode(LED) and laser diode(LD) were compared, so that the characteristics of laser diode were obtained, and that laser diode was found to adapt to the fiber optic communications with large capability and long-distance transmission. In the new-generation optical soliton communications system, whether as a light source of optical soliton or a pumping source of EDFA, laser diode exerts very important function. The Laser diode exerts more important effect in future..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 18 (2010)
Support Optimization for Collimator Primary Mirror
WU Wei, WANG Wei, LIN Li-ming, FAN Xue-wu, and YU Shun-jing
How to support the Mirror, especially the primary mirror is one of the most difficulties to design a large aperture and long focal length collimator. The number and the location of support points for collimator primary mirror are optimized. The diameter of primary mirror is 1 000 mm. The formidable optimization analysiHow to support the Mirror, especially the primary mirror is one of the most difficulties to design a large aperture and long focal length collimator. The number and the location of support points for collimator primary mirror are optimized. The diameter of primary mirror is 1 000 mm. The formidable optimization analysis module of ANSYS is used to optimize the primary mirror’s model in condition of 3, 9, 18, 24 and 27 different points support. Also, static analysis of five different numbers of points support in gravity field is simulated. From the displacements of five mirror models, the values of PV and RMS respectively are calculated. To satisfy the requirement of PV and RMS, the best case can be given-18 points support..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 21 (2010)
Integral Statistic Estimation of Boresight Error Using Return Optical Signal
HAN Lei, REN Ge, ZHOU Lei, and XIANG Chun-sheng
All laser pointing systems are subject to two fundamental pointing errors which are boresight and jitter errors. The beam can be accurately pointed to the target and the signal loss can be reduced during transmission if the effect of the two main pointing errors are mitigated. A new method of the laser pointing system All laser pointing systems are subject to two fundamental pointing errors which are boresight and jitter errors. The beam can be accurately pointed to the target and the signal loss can be reduced during transmission if the effect of the two main pointing errors are mitigated. A new method of the laser pointing system based on a Gaussian far-field irradiance profile and a Gaussian jitter model is proposed, and which can get boresight error using the information of the return optical intensity without the return signal from sensors on the target neither scanning the target and get the error only 5 μrad. The experimental results successfully validated the feasibility of this method..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 25 (2010)
Structural Features and Technical Analysis of New Infrared Optical System
LIU Qun-long, WU Han-ping, ZHANG Yan, and HU Da-jun
With the development of infrared technology, the effect of infrared optical system should not be overlooked. The structural features of modern infrared optical system (such as off-axis three-mirror system, binary optical system and adaptive optical system) were analyzed on the basis of the summarizing traditional infraWith the development of infrared technology, the effect of infrared optical system should not be overlooked. The structural features of modern infrared optical system (such as off-axis three-mirror system, binary optical system and adaptive optical system) were analyzed on the basis of the summarizing traditional infrared optical system (such as reflective IR optical system, refractive IR optical system and catadioptric IR optical system). The advantages and disadvantages of traditional infrared optical systems and modern infrared optical systems were compared from the technical aspect, and the development tendency of the infrared optical system was explored. There is some theoretical guidance role and significance in further research and development of new infrared optical system..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 29 (2010)
Thermal Emission Control with Two-Dimensional Photonic Crystals
DAI Qiao-feng
The thermal emissions of two-dimensional photonic crystals are researched with transfer matrix method. The thermal emission in stop band is generally weak for a perfect photonic crystal. As the radii of air holes in surface layer are changed, the thermal emission is adjusted accordingly. In some wavelengths, the thermaThe thermal emissions of two-dimensional photonic crystals are researched with transfer matrix method. The thermal emission in stop band is generally weak for a perfect photonic crystal. As the radii of air holes in surface layer are changed, the thermal emission is adjusted accordingly. In some wavelengths, the thermal emission is become greatly big. Such kind of modification of thermal emission is originated from the excitation of surface mode..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 35 (2010)
A Complex Electrode Flat Back-light for LCD
WANG Qi-guan, WANG Su-min, and LI Jian-ping
A new flat back-light excited by plasma employing different conductive materials as the external electrode was developed. This back-light is composed of two sealed flat glasses in which the pure Xe (at pressure of 200 Torr) was inflated and a layer of phosphor was coated. A water film being considered as electrode was A new flat back-light excited by plasma employing different conductive materials as the external electrode was developed. This back-light is composed of two sealed flat glasses in which the pure Xe (at pressure of 200 Torr) was inflated and a layer of phosphor was coated. A water film being considered as electrode was sealed on the out surface of the upper glass substrate, and an ITO film being considered as conductive medium was added on the out surfaces of the lower glass substrate by using the transparent conductive tape, where the glass with thickness of 1.1 mm was used as the dielectric barrier discharge layer. The white light was available by exciting the phosphor layer with the plasmas introduced by high-frequency voltage, whose luminance was 4 000 cd/m2 accompanied with the lighting homogeneity over than 92%. The experimental results show that the most suitable driving frequency was 9.6 kHz..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 38 (2010)
Preparation and Properties of Photochromic Mesoporous Silica/Molybdphosphoric Acid Composite Thin Films
TIAN Tian, ZHANG Xue-ao, WANG Jian-fang, WU Wen-jian, and LUO Zhi-gang
The photochromic mesoporous silica/ molybdphosphoric acid composite thin films were prepared by evaporation induced self-assembly process and wetness impregnation. The results indicate that the PMo molecules are homogeneously distributed and immobilised inside silica mesopores modified by organic amine. The composite tThe photochromic mesoporous silica/ molybdphosphoric acid composite thin films were prepared by evaporation induced self-assembly process and wetness impregnation. The results indicate that the PMo molecules are homogeneously distributed and immobilised inside silica mesopores modified by organic amine. The composite thin films change from colorless to blue under ultraviolet irradiation. It is shown that the charge transfer occurs by reduction of heteropolyanions accompanying the formation of heteropolyblues, and the bleaching process of composite thin films is closely related to the presence of oxygen..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 42 (2010)
Lo/Hi-Beam Auto-switch of Automobile Headlight
LIU Xiao-en
The meeting car to car, Lo/Hi-beam automatically transform design ideas of headlight is described, and the car will automatically change the distance adjustable light control circuit design, control system also includes open automatically according to ambient brightness near light or high beam headlights automatically The meeting car to car, Lo/Hi-beam automatically transform design ideas of headlight is described, and the car will automatically change the distance adjustable light control circuit design, control system also includes open automatically according to ambient brightness near light or high beam headlights automatically turn on the lights / delay lights of the circuit design. The technology has support for manual / auto-darkening two modes, design simple, reliable, stable performance, convenience and low cost of construction characteristics, suitable for automotive lighting lighting system using the transformation..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 45 (2010)
Removal of Slow A/D Conversion Frequency Interference
LIU Li, SI Han-ying, and MA Hong-rui
Frequency interference is the most common form of interference signals in all kinds of information equipment and signal processing. If the frequency interference is not removed, it would affect the measurement accuracy. In the beginning, the frequency interference on the impact of the analog signal was analyzed, then aFrequency interference is the most common form of interference signals in all kinds of information equipment and signal processing. If the frequency interference is not removed, it would affect the measurement accuracy. In the beginning, the frequency interference on the impact of the analog signal was analyzed, then according to the characteristics of interference, a control circuit to control sampling frequency was designed, and the sampling frequency and frequency synchronization were realized, and so as to effectively remove the frequency interference. Finally by the method of calibration, the ideal mathematical relationship of the output values and the input analog signal were obtained..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 48 (2010)
Principle of Linearity Optocouplers HCNR201 and Its Applications in Bearing Fault Detection
LI Pei-jian, and CAI Hai-chao
Because railway trucks bearing fault detection field conditions are extremely complicated, every electromagnetic interference signals can easily enter the measurement system along with the measured signal. To address this issue, the voltage isolation hardware circuit achieved by high linearity analog optocoupler HCNR20Because railway trucks bearing fault detection field conditions are extremely complicated, every electromagnetic interference signals can easily enter the measurement system along with the measured signal. To address this issue, the voltage isolation hardware circuit achieved by high linearity analog optocoupler HCNR201 and operational amplifier was designed. In the circuit, one operational amplifier is used as a negative feedback amplifier in front of the linear optocoupler, which is used to detect analog voltage signal; the operational amplifier at the end of linear optocoupler makes a conversion between the current and voltage, outputs finely voltage signal and achieves the 1:1 isolation transmission of voltage signal. The experimental results show that the measuring method can realize the good voltage linearity and high accuracy..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 51 (2010)
Coin Denomination Recognition Based on Neural Network
MAO xi, and GUO Guang-li
The automatic recognition of coin denomination is a key technology for vending machines and coin sorting machines. The exterior appearance of the coin was used to recognition its denomination through capturing the image signal of the coin by using camera. Firstly, the invariant moments of coins image were extracted, thThe automatic recognition of coin denomination is a key technology for vending machines and coin sorting machines. The exterior appearance of the coin was used to recognition its denomination through capturing the image signal of the coin by using camera. Firstly, the invariant moments of coins image were extracted, then the neural network was used to classify the images for realizing the recognition of coin denomination. The experimental results show that the proposed method can achieve satisfying recognition results..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 54 (2010)
Noise’s Impact on Hadamard Transform Decoding Algorithm
LI Yun, XIANG Li-bin, ZHOU Jin-song, and WEI Ru-yi
In the Hadamard transform imaging spectrometer, the Hadamard decoding is very important, and the noise brings an affect on the decoding to a certain extent. The basic principles of the Hadamard transform imaging spectrometer are described. On this basis, the inverse filtering method for Hadamard decoding algorithms is In the Hadamard transform imaging spectrometer, the Hadamard decoding is very important, and the noise brings an affect on the decoding to a certain extent. The basic principles of the Hadamard transform imaging spectrometer are described. On this basis, the inverse filtering method for Hadamard decoding algorithms is analyzed. In the actual imaging process, the noise will be inevitably introduced. Through analysis, the impact of the Gaussian blur noise on the Hadamard decoding algorithm is primarily studied, the computer simulation results are given. It is very important for the further study of Hadamard decoding algorithm..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 57 (2010)
Imaging Quality Evaluating Method of Optical Measurement Film Based on Hough Transform
WANG Yu-mei
The photo sensitive characteristic curve is one quality evaluating method of measuring film. Aiming at the strong subjectivity, big error, quantitative difficulty of the traditional evaluating method, the imaging quality evaluating method of optical measurement film was put forward, using Hough transform technology to The photo sensitive characteristic curve is one quality evaluating method of measuring film. Aiming at the strong subjectivity, big error, quantitative difficulty of the traditional evaluating method, the imaging quality evaluating method of optical measurement film was put forward, using Hough transform technology to make a space shift for the film photo sensitive characteristic curves, and evaluating the indexes of characteristics by analyzing and testing the changing rules, slope, broken-line rate of the characteristic curves. The experiment was done using two different imaging quality wedge films of 21 steps, the results prove the evaluating results are more correct and objective, it can truly reflect the imaging quality of the optical measurement film..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 61 (2010)
Modeling and Analyzing the Noise of CCD
JIANG Bao-tan, QIU Yue-hong, WEN Yan, and CHEN Zhi
In order to improve performance of CCD(charge coupled device) at low light levels, a new technique of eliminating readout noise is presented after analyzing the short of classical technique, namely, correlated double sampling.First, the primary kinds of noise in CCD are analyzed, and then a platform for generating and In order to improve performance of CCD(charge coupled device) at low light levels, a new technique of eliminating readout noise is presented after analyzing the short of classical technique, namely, correlated double sampling.First, the primary kinds of noise in CCD are analyzed, and then a platform for generating and analyzing the noise in CCD is established. An array of proper numbers can be found to be used in the practical filter circuit from the result obtained by the platform under low light level. Therefore, the reset noise of CCD can be eliminated more efficiently than classical technique and any other noise passes doesn’t introduced through digital filter..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 64 (2010)
Design of Electro-optical Simulator and Its Application in Semi-physical Emulation Test
DAI Zhe, TIAN Ying, and SHI Yan
The design and realization of electro-optical simulation as well as its application in semi-physical emulation test were introduced. In the hardware design, the hardware of electro-optical simulation is based on the industry-control-computer platform. The hardware was designed and realized in order to provide the videoThe design and realization of electro-optical simulation as well as its application in semi-physical emulation test were introduced. In the hardware design, the hardware of electro-optical simulation is based on the industry-control-computer platform. The hardware was designed and realized in order to provide the video simulation image for the tested equipment. In the software design, the electro-optical simulation software was written in Visual C++ programming environment, which supports the functions such as emulated trace creation, video simulation image sending, test data process and evaluation..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 68 (2010)
Simulation and Test of Tracked Vehicle Ride Comfort
ZHU Zhi-hao, HUA Shun-gang, ZHANG Li-na, and YU Shuai
Based on virtual prototype technology, combined with three-dimensional modeling, FEA and multi-body dynamics software, simulation technology of tracked vehicle ride comfort was studied. A mixed rigid-flexible virtual prototype of a certain tracked vehicle and a random uneven road were created to form the simulation sysBased on virtual prototype technology, combined with three-dimensional modeling, FEA and multi-body dynamics software, simulation technology of tracked vehicle ride comfort was studied. A mixed rigid-flexible virtual prototype of a certain tracked vehicle and a random uneven road were created to form the simulation system of ride comfort. The ride comfort simulation was carried out on the F-level virtual road, from which the acceleration curves at the location of driver were captured. According to the evaluation standards, the ride comfort of the tracked vehicle was analyzed and evaluated. By compared with the actual tests and computing results, it shows that the simulation model system and evaluation method are reasonable and feasible for analyzing and improving the mobility of tracked vehicle..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 71 (2010)
Moving Vehicles Detection in Intelligent Transportation Systems Based on Optical Flow
LI Xi-lai, LI Ai-hua, and BAI Xiang-feng
As the video vehicle detecting has a great importance to the intelligent transportation system, a new moving vehicle detection method based on optical flow in complicated background was presented. To deal with the hypothesis that the smoothness of optical flow and the conservation of gray intensity don’t come into exisAs the video vehicle detecting has a great importance to the intelligent transportation system, a new moving vehicle detection method based on optical flow in complicated background was presented. To deal with the hypothesis that the smoothness of optical flow and the conservation of gray intensity don’t come into existence on the condition of shadow, boundary and overlap, a new forward-backward optical flow equation is introduced and the Hessian matrix of equation is computed. Then the conditional number of the matrix is combined with the associated matrix of Lucas-Kanade’s optical flow method to eliminate the restriction points which are not credible within local neighborhood. Experimental results show that the proposed method helps to obtain satisfying detecting results due to its good stability and high detecting accuracy. The results can be used as the basis of advanced vehicle control and traffic management in intelligent transportation systems..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 25, Issue 2, 75 (2010)
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20