Journals >Electro-Optic Technology Application
Contents
2009
Volume: 24 Issue 6
20 Article(s)
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Research Article
Design and Realization of Dynamic Deformation Screen
MENG Xian-hao, and LV Xu-liang
The principle of deformation screen was described. The method of using dynamic deformation screen was il1ustrated. A kind of deformation screen backstop used for vehicles and other moving targets was designed which combined with camouf1age nets to constitute a deformation screen. A screen span experiment was made on soThe principle of deformation screen was described. The method of using dynamic deformation screen was il1ustrated. A kind of deformation screen backstop used for vehicles and other moving targets was designed which combined with camouf1age nets to constitute a deformation screen. A screen span experiment was made on some vehicles , the edge detecting method evaluating the image has been adopted after span by MAT LAB, the target' s contour features were found to be eHectively changed. Though comparing three kinds of images in the cases of not using a screen , using a simple screen and using the distortion screen , it was found that the target can integrate with background after applying deformation screen..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 1 (2009)
Theoretical Calculation of Temperature Distribution of A Space Target
LI YingJie, and LV XiangYin
Obtaining the target′s surface temperature field is prerequisite to analysis of the IR characteristic. In order to determine the temperature field distribution, a differential equation of heat conduction for space target was established and the surface temperature distribution of space target was got by node network. LObtaining the target′s surface temperature field is prerequisite to analysis of the IR characteristic. In order to determine the temperature field distribution, a differential equation of heat conduction for space target was established and the surface temperature distribution of space target was got by node network. Lastly the value calculation was made and analyzed for the surface temperature distribution of a space target model..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 4 (2009)
Color Matching of RGBLEDs Based on Dichotomy
XU Shibo, LV Yijun, CHEN Huanting, GAO Yulin, and CHEN Zhong
The way to match the ratio of RGB trichromatic lights to get arbitrary color of light quickly and accurately is of great significance. An easily realizable RGBLEDs color matching model with simple structure was proposed. An arbitrary color can be matched by changing trichromatic LED radiation power in the way of curreThe way to match the ratio of RGB trichromatic lights to get arbitrary color of light quickly and accurately is of great significance. An easily realizable RGBLEDs color matching model with simple structure was proposed. An arbitrary color can be matched by changing trichromatic LED radiation power in the way of current amplitude modulation, which in turn adjusts the proportion of each color′s luminous intensity. At the same time, an accuracy evaluation indicator for color matching model was given. Based on the model, a dichotomy algorithm of RGB color matching is employed so that the chromaticity coordinates of mixed color can be quickly matched to a specified scope. The simulation results prove the correctness and validity of the algorithm. This algorithm has a high value in practical application for its rapid convergence and high precision color matching..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 7 (2009)
A Method of Object Recognition Based on Optical Correlation
HU Xianliang, and ZHANG Weiping
The principle of correlation recognition of target is analyzed. To solve the distortion problem in direction and scale, a distortion invariant model is designed and improved by means of synthetic discriminate function (SDF), by introducing the recognition SDF into training samples. The recognition capability could be eThe principle of correlation recognition of target is analyzed. To solve the distortion problem in direction and scale, a distortion invariant model is designed and improved by means of synthetic discriminate function (SDF), by introducing the recognition SDF into training samples. The recognition capability could be enhanced by changing the superposition coefficient to insure that the correlation peak at the origin point is higher while the correlation peaks in different samples maintain alike..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 11 (2009)
Design of Temperature Control System with Integrated Utilization of Solar PhotovoltaicThermal(PV/T) Effects
HE Chao, WU Hanping, HU Dajun, and ZHANG Yan
A temperature control system is designed based on the principle of thin film optics and heat transfer theory, it integrates the utilization of solar photovoltaicthermal effect by using a specific optical thin film to eliminate the ultraviolet radiation and a thermal circulation system to reduce its working temperatureA temperature control system is designed based on the principle of thin film optics and heat transfer theory, it integrates the utilization of solar photovoltaicthermal effect by using a specific optical thin film to eliminate the ultraviolet radiation and a thermal circulation system to reduce its working temperature. After deducing the operational principle and design ideas of such system, the index are advanced, and the influence factors of ambient temperature and spectral transmittance to the heat transfer efficiency are analyzed. And then, several reasonable improved methods are put forward. A professional thinfilm design software named TFCalc is applied to design a particular optical thin film, simulation results show that the film can reflect a certain bandwidth of ultraviolet spectrum. The temperature control system has good practical value for the widely used photovoltaic power system..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 14 (2009)
Attenuation and Reflection of Electromagnetic Wave in Uniform Magnetized Plasma
LV Dan, and TONG Chuangming
When a metallic target is coated with plasma, the plasma will absorb and refract the incident electromagnetic wave, so as to attenuate the power of the incident wave and reduce the power of the reflected wave. Thus, the RCS of the target also will be reduced. For the uniform magnetized plasma, the permittivity has a reWhen a metallic target is coated with plasma, the plasma will absorb and refract the incident electromagnetic wave, so as to attenuate the power of the incident wave and reduce the power of the reflected wave. Thus, the RCS of the target also will be reduced. For the uniform magnetized plasma, the permittivity has a relationship with the density of particle of plasma, the intensity of the outer magnetic field, the collision rate of electron and the frequency of the incident wave. The influence of different density, intensity, collision rate and thickness on the attenuation and reflection characteristics of electromagnetic wave in millimeter wave band can be calculated by the simulation method..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 19 (2009)
Research and Developments of Thirdorder Nonlinear Optical Polymers
JIAO Feng, LIU Xin, and ZHANG Xiaoguang
The thirdorder nonlinear optical polymers attract more and more attention. The theory, research methods and affect factors of thirdorder nonlinear optical effect were introduced briefly. Some nonlinear optical polymers of popular interest were discussed, and the advantages and disadvantages of such were compared. BasThe thirdorder nonlinear optical polymers attract more and more attention. The theory, research methods and affect factors of thirdorder nonlinear optical effect were introduced briefly. Some nonlinear optical polymers of popular interest were discussed, and the advantages and disadvantages of such were compared. Based on the principles of nonlinear optics, the organic molecular design has also been analyzed. The future of the thirdorder nonlinear optical polymers is prospected..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 23 (2009)
Intelligent CCD Detector Design for Portable Spectrometers
CAI Zhijian, WEI Xiaoru, JU Jianzhi, and WU Jianhong
Spectrometer is one of the most important optical instruments. CCD spectrometer technology is moving in the direction toward miniaturization and even microminiaturization. A design project of intelligent CCD detector specifically for portable spectrometers is proposed in accordance with the features of the portable spSpectrometer is one of the most important optical instruments. CCD spectrometer technology is moving in the direction toward miniaturization and even microminiaturization. A design project of intelligent CCD detector specifically for portable spectrometers is proposed in accordance with the features of the portable spectrometer. This detector combines the intelligent control ability of MCU and the accurate and programmable timing feature of CPLD, and integrates with a USB interface to facilitate data acquisition and light integraltime control from the host computer. The design realized a miniaturization, intelligence and integration for spectrometer CCD detector is implemented..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 28 (2009)
Analysis of Principle and Accuracy Reliability of High Accurate Sun Sensor
ZHANG Wanyong
The principle and the expression of accuracy reliability of some kinds of sun sensor were analyzed to find that the accuracy of the compound sun sensor based on the existing device have the potential to be enhanced. Based on the device used in disquisition, it was confidence that in theory the absolute accuracy reliabiThe principle and the expression of accuracy reliability of some kinds of sun sensor were analyzed to find that the accuracy of the compound sun sensor based on the existing device have the potential to be enhanced. Based on the device used in disquisition, it was confidence that in theory the absolute accuracy reliability of angle resolution can be at digitally 10-5, and the accuracy can be improved digitally 2; along with the progressing of the device, the accuracy of sun sensor to be used in future can reach digitally 5, or even more..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 32 (2009)
Design of Michelson Interference Ring AutoCount Device
ZHAO Zhongwei, CHEN Peng, SUN Zhongtao, and CHENG Yubao
Aiming at the fact that the Michelson′s interferometer needs artificial counting the interference rings, a kind of interference ring autocount device is designed. The optoelectronic sensor and thresholds comparator are used in the device to collect the interference ring, producing the electric impulses corresponding tAiming at the fact that the Michelson′s interferometer needs artificial counting the interference rings, a kind of interference ring autocount device is designed. The optoelectronic sensor and thresholds comparator are used in the device to collect the interference ring, producing the electric impulses corresponding to the light and dark fringes. The electric impulses are counted and displayed by the microcontrollers. In order to eliminate the interfering impulses generated by circuit noise, the delay technology of is used in the software, which improves accuracy of pulse counting. The experimental result shows that the device is accurate and feasible for Michelson interference experiment..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 36 (2009)
Fiber Bragg Grating Temperature Sensing System of Power Cables Based on Least Square Method
YANG Guangxue, and MO Lei
To improve the accuracy and speed of the online temperature measurement system for power cables, a method for fitting data reference points was proposed, which uses fiber interleaver filter to replace referencegrating. Least square method is utilized to fit linear dependency between bragg wavelength of fiber grating To improve the accuracy and speed of the online temperature measurement system for power cables, a method for fitting data reference points was proposed, which uses fiber interleaver filter to replace referencegrating. Least square method is utilized to fit linear dependency between bragg wavelength of fiber grating and tuning voltage of FabryPerot filter. With wavelength shift that is demodulated by the tunable FabryPerot filter, the system realizes temperature measurement of power cables. The result of the research shows that fiber interleaver filter can replace the referencegratings in thermostatic environment to calibrate the wavelength shift. Error of reflected wavelength is ±5pm, and mean square error of temperature is 0.7℃..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 39 (2009)
Application of Remote Intelligent Control in Continuous Variables Coherent Optical Systems
LIN Li, and HUANG Chunhui
In the laboratory, in view of the requirement of high sensitivity and the problem of external interference on continuous variables coherent optical communications platform, the remote intelligent control system is designed based on LabVIEW and the AVR microcontroller. The system communicates with AVR microcontroller thIn the laboratory, in view of the requirement of high sensitivity and the problem of external interference on continuous variables coherent optical communications platform, the remote intelligent control system is designed based on LabVIEW and the AVR microcontroller. The system communicates with AVR microcontroller through the RS232 standard serial interface, which uses LabVIEW8.2 remote front panel technology, serial port VI and data acquisition board. The remote intelligent control of the power supply of various electric circuit modules is realized in the coherent optical communications system. The power supply systems are protected effectively and the disturbance is reduced..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 43 (2009)
Design of Portable Multichannel Temperature Data Acquisition System Base on LabVIEW
LI Cheng, SUN Yanfeng, and NING Qi
For multipoint temperature measurement in various environments, a portable multichannel temperature data acquisition system was designed. Making use of the thermocouple as the temperature sensor, the signal of thermocouple is modulated by NI 9211 4channel thermocouple input module, then sent into the computer throughFor multipoint temperature measurement in various environments, a portable multichannel temperature data acquisition system was designed. Making use of the thermocouple as the temperature sensor, the signal of thermocouple is modulated by NI 9211 4channel thermocouple input module, then sent into the computer through the USB bus for analysis and display. Based on a graphic development environment of LabVIEW, and with the flexible configurations of all parameters, the system software has a good applicable value in the multipoint temperature measurement..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 47 (2009)
Design of Isolated Circuit of Bipolar Signal Based on Linear Optocoupler HCNR201
YANG Jupeng, WANG Junmin, and LIU Diren
Data acquisition in transient electromagnetic method(TEM) is in a high voltage and strong electromagnetic field. If there is not electric isolation between analog quantity and digital amount, the high voltage is easy to entry in the low voltage device and destroy it. A bipolarsignal isolation circuit was designed basedData acquisition in transient electromagnetic method(TEM) is in a high voltage and strong electromagnetic field. If there is not electric isolation between analog quantity and digital amount, the high voltage is easy to entry in the low voltage device and destroy it. A bipolarsignal isolation circuit was designed based on the features of the highlinearity optocoupler HCN201, and the working principle and the features of the highlinearity optocoupler HCN201 were introduced. The experimental results show the circuit has the better linearity, high acuracy and practicability in TEM system..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 51 (2009)
Feedback Control of DC Motor by PID Algorithm
LI Tiantian, CHEN Hong, and LI Jingtao
Closed feedback control to DC motor was made by PID based on SPMC75F2413A SMC and coder in order to make the hookliked scanning probe driven by the DC motor to rest on the specified position. The PID feedback control algorithm can be used to realize displacement control. The coder changes the displacement of the hookClosed feedback control to DC motor was made by PID based on SPMC75F2413A SMC and coder in order to make the hookliked scanning probe driven by the DC motor to rest on the specified position. The PID feedback control algorithm can be used to realize displacement control. The coder changes the displacement of the hookliked scanning probe to electric pulse. Through SPMC75F2413A SMC, these electric pulses were analyzed and compared to the specified value. The output signals were calculated by the differences to control the right and reverse round of the motor, i.e. when the hooklike probe is higher than the position, the DC motor rotates reversely immediately, if lower, the motor rounds rightly..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 55 (2009)
Effects of Dispersion on Performance of ROF
GAO Song, PEI Li, QI Chunhui, AN Lijing, LI Zhuoxuan, and ZHAO Ruifeng
The basic principles of dispersion are illustrated. The researching on ROF system indicates that with the increasing of transmission velocity, the dispersion will limit the performances of the transmission system, even lead to the distortion of the signal. The effects of dispersion on ROF system are summarized and analThe basic principles of dispersion are illustrated. The researching on ROF system indicates that with the increasing of transmission velocity, the dispersion will limit the performances of the transmission system, even lead to the distortion of the signal. The effects of dispersion on ROF system are summarized and analyzed from three aspects: the two different ways of amplitude modulation (DSB modulation and SSB modulation), the two different ways of modulation in the number of wavelength (solitary wavelength and dual wavelength) and the chirped phenomenon caused to the signal in its transmission. The conclusion is that SSB modulation is better than DSB modulation, which provides some theoretical basis for improving the performance of ROF system..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 58 (2009)
Interaction between People and OptElectronic Reconstructed Real Images of Digital Hologram
YU Yingjie, LI Yulang, and ZHENG Huadong
In order to improve the naturalness of interaction, an interaction method that uses finger detected by special orthogonal binocular cameras as an input of interactive system to guide holographic images display is proposed. After analyzing finger movement and images changes, an interaction relationship between them is eIn order to improve the naturalness of interaction, an interaction method that uses finger detected by special orthogonal binocular cameras as an input of interactive system to guide holographic images display is proposed. After analyzing finger movement and images changes, an interaction relationship between them is established. For realizing the interaction, the digital hologram sequences should be acquired beforehand through computergenerated holograms, then the relevant holograms should be selected to reconstruct images according to finger information detected by cameras, eventually, the interaction between finger and optelectronic reconstructed real images of digital hologram can be achieved. The proposed method is validated by an interaction between peacock images and people..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 61 (2009)
Realization of RealTime Infrared Image Accommodation Linear Enhancement Algorithm Based on FPGA
XU Shiwei, ZHANG Wei, LIU Yanyan, and GAO Wenqing
A grayscale histogram statistic method was proposed, a frame image histogram statistics was completed using FPGA and the next frame of image data conversion was made by the adaptive linear enhanced algorithm. According to the needs for real time processing, field programmable gate arrays (FPGA ) was applied to construA grayscale histogram statistic method was proposed, a frame image histogram statistics was completed using FPGA and the next frame of image data conversion was made by the adaptive linear enhanced algorithm. According to the needs for real time processing, field programmable gate arrays (FPGA ) was applied to construct the highspeed image preprocessor and to finish the realtime calculation for infrared tracking image preprocessing. The simulation and experimental results demonstrate that this method is feasible, and it has the advantages such as: the simple code, less system resources occupied by FPGA, and the capability of realtime data conversion..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 66 (2009)
Solution of Lathing Deformation Parameters by Regression Analysis
GAN Yongli, LV Zhixin, and NIU Daming
The workpieces will be deformed under the cutting and clamping forces during the lathing,the values of deformation will directly influence the precision of workpiece,especially with bad diameter rigidity. So how to obtain the lathing and clamping values is very important to improve the precision and efficiency of mass The workpieces will be deformed under the cutting and clamping forces during the lathing,the values of deformation will directly influence the precision of workpiece,especially with bad diameter rigidity. So how to obtain the lathing and clamping values is very important to improve the precision and efficiency of mass production. The parameters can be partly gained by regression analysis, it can instruct the mass lathing instrumentally..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 70 (2009)
Fatigue Intensity Calculation and Analysis of Mechanical Parts
LI Wenhong, and HUANG Xiaochun
The mechanical parts of the brackets are destroyed in oscillation experimentation, the reasons of destructions were analyzed and researched, the safety factors of the static strength of their supporting parts meet the requirements, which indicates these destructions are fatigue destructions. Based on the fatigue destroThe mechanical parts of the brackets are destroyed in oscillation experimentation, the reasons of destructions were analyzed and researched, the safety factors of the static strength of their supporting parts meet the requirements, which indicates these destructions are fatigue destructions. Based on the fatigue destroying theory and bracket models, from the beginning of the theoretical calculation the fatigue loads were analyzed. Depending on the fatigue destroying theory and the conclusions of the calculation, the correlative designs and technical measures were taken to the main supporting parts. The oscillation experimentation and actual application have proved these technical measures are reasonable and reliable, the problems of the bracket fatigue are solved and the brackets could meet the requirements of the environment..
Electro-Optic Technology Application
- Publication Date: Oct. 09, 2021
- Vol. 24, Issue 6, 73 (2009)
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