Journals >Electro-Optic Technology Application
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2020
Volume: 35 Issue 2
16 Article(s)
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Research on Kinematic Decoy at Abroad
ZHANG Jing-yuan, ZHAO Fei-yu, GAO Xu-heng, and GUO Kai
Kinematic decoys, with kinematic characteristics more similar with aircraft, which can improve thecountering ability to guiding missiles with speed characteristic identification. Kinematic radar decoys can improvethe countering ability to pulse Doppler (PD) radar guiding missiles. Comparing with traditional infrared deKinematic decoys, with kinematic characteristics more similar with aircraft, which can improve thecountering ability to guiding missiles with speed characteristic identification. Kinematic radar decoys can improvethe countering ability to pulse Doppler (PD) radar guiding missiles. Comparing with traditional infrared decoy, kine.matic infrared decoy can improve the countering ability to infrared-guided missiles with kinematic characteristicidentification. The technology research and equipment status of abroad kinematic decoy are introduced, which pro.vide reference for jamming technology to countering advanced guided missiles..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 2, 1 (2020)
[in Chinese]
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 2, 1 (2020)
Research on Concept Model of Non-power Heavy Decoy Based on Aerodynamic Drag
LI Zhi-yuan, and GAO Ying
Based on false target jamming theory, ballistic target motion theory in re-entry phase and radar scat. tering characteristics, a concept model of non-power heavy decoy with reference to aerodynamic drag coefficient isproposed. And a kind of accompanying heavy decoy in ballistic missile penetrating re-entry phase, with Based on false target jamming theory, ballistic target motion theory in re-entry phase and radar scat. tering characteristics, a concept model of non-power heavy decoy with reference to aerodynamic drag coefficient isproposed. And a kind of accompanying heavy decoy in ballistic missile penetrating re-entry phase, with the samesize, much smaller volume and lighter weight is designed, which combines with the domestic and foreign researchstatus. And in consideration of the effect of warhead resistance coefficient, accompanying in ballistic missiles re-en. try phase is realized by morphological change instead of engine adjustment. Also, a structure of passive radar jam.ming component is established by calculating performance parameters of the core component. At last, the radar scat.tering characteristics of the core jamming components are simulated and experimentally tested, which provides thetheoretical basis and data support for the research onaccompanying heavy decoy in ballistic missile penetrationre-entry phase..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 2, 7 (2020)
Research on Preparation of Modified Carbon Fiber and RCS Characteristics
LIU Yu-jie, ZHAO Fei-yu, REN Qing-guo, GUO Shu-chao, and YIN Qing-guo
As a new function material, carbon fiber (CF) has wide application prospect in radar passive jam. ming for it’s higher conductivity. A copper coating is electrolessly deposited on the surface of carbon fiber, and thena nickel film is deposited on the surface of the copper coating by means of chemical vapor deposition pAs a new function material, carbon fiber (CF) has wide application prospect in radar passive jam. ming for it’s higher conductivity. A copper coating is electrolessly deposited on the surface of carbon fiber, and thena nickel film is deposited on the surface of the copper coating by means of chemical vapor deposition process. Themorphology and composition of the modified carbon fiber are tested with scanning electron microscopy (SEM), ener.gy disperse spectroscopy (EDS) and X-ray diffraction (XRD). The radar cross section (RCS) characteristics of themodified carbon fiber are analyzed by RCS testing system. The results showed that Ni-Cu deposited carbon fiber isuniformly and flatness, which exists in elemental state. The RCS value of the modified carbon fiber is improvedgreatly compared with that of the non-modified carbon fiber and it is close to the theoretical value..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 2, 12 (2020)
Research on Application of Thin Film Interference in Cinnabar Stick Sequence of Ink-jet File
YU Lin
Cinnabar stick sequence checking is one of the most important parts of document formation timechecking technology. As the number of cases involving ink-jet printed documents increases, in order to effectivelysolve the problem that it is difficult to test the sequence of ink in ink-jet printing documents, the principle Cinnabar stick sequence checking is one of the most important parts of document formation timechecking technology. As the number of cases involving ink-jet printed documents increases, in order to effectivelysolve the problem that it is difficult to test the sequence of ink in ink-jet printing documents, the principle of thin-film interference is applied to the sequence of ink documents, and exploring a new feature in cinnabar stick se.quence. In view of the printer type, the seal oil type, the seal material, the light and so on, the thin film interferencephenomenon to the ink time sequence influence is sought and the ink time sequence phenomenon formation reasonis analyzed. Through observing the appearance of yellow-green interference fringes under different conditions by mi.croscope examination, a comprehensive comparison and analysis is made. The results show that the thin film inter.ference phenomenon is more obvious in the document which is printed first and then stamped than in the documentwhich is stamped first and then printed. It can be concluded that the thin film interference phenomenon is valuablefor cinnabar stick sequence checking, and can provide reference for the sequence judgment of printing documentsand seals..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 2, 16 (2020)
Design of Large Field of View Off-axis Three-mirror Reflective Optical System
SHEN Zhi-juan
Compared with the traditional refraction optical system, the off-axis reflection optical system has thecharacteristics of small volume, light weight and no chromatic aberration, and thus it is widely used in the field oftelescope system and space observation system. With the widely use of the free surface, at first, thCompared with the traditional refraction optical system, the off-axis reflection optical system has thecharacteristics of small volume, light weight and no chromatic aberration, and thus it is widely used in the field oftelescope system and space observation system. With the widely use of the free surface, at first, the initial structureparameter determination method of the off-axis three-mirror reflective optical system is analyzed. And then, the freesurface with the Zernike polynomial to design the main mirror of the optical system is applied. At last, the off-axis three-mirror reflective optical system is designed, and its effective focal length is 700 mm, field of view is 10°, rela.tive aperture is F/# is 4.5, total length is 597.58 mm. The modulation transfer function (MTF) in every field angle ishigher than 0.28 at 71.4 lp/mm, and its maximum distortion is less than 0.1%, and the results show the image quali.ty of the optical imaging system is very good. Therefore, the design method of the optical system has the certain ref.erence value for similar off-axis three-mirror optical system design..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 2, 24 (2020)
Design and Implementation of Turntable Protection System Based on Ultrasonic Ranging
LI Tian-hao, FAN Xin-kun, LI Hang-yu, and ZHAO Jian
Aiming at the current situation of imperfect protection measures of turntables, a turntable protectionsystem based on ultrasonic ranging is designed. The basic working principle of the ultrasonic ranging is introduced.The hardware and software designs of the turntable protection system are described in detail. The testAiming at the current situation of imperfect protection measures of turntables, a turntable protectionsystem based on ultrasonic ranging is designed. The basic working principle of the ultrasonic ranging is introduced.The hardware and software designs of the turntable protection system are described in detail. The testing is complet.ed in a laboratory. Testing results show that the system can trigger the alarm in time at the nearest presented dis.tance of 30 cm and the longest alarm distance of 70 cm, and the turntable's enable control button is cut off to ensurethe safety of testers. The feasibility of the ultrasonic ranging turntable protection system is verified, and technicalsupports are provided for other turntable protection designs..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 2, 28 (2020)
Design and Implementation of Infrared Gun Pointing Mirror System for Automatic Rifle
BAI Peng-Fei1, and ZHANG Jia-Li2
The design principle and function of this kind of infrared sight are described. The detailed formulaand simulation results are given. And the system error and the hit probability of this kind of infrared sight are ana.lyzed and simulated.The design principle and function of this kind of infrared sight are described. The detailed formulaand simulation results are given. And the system error and the hit probability of this kind of infrared sight are ana.lyzed and simulated..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 2, 32 (2020)
Design and Implementation of Laser Warning Testing System Based on Wireless Control
WU Xue-feng, LI Tian-hao, and FAN Xin-kun
The traditional laser warning testing system has the problems of low angle testing efficiency, poorcoding accuracy, low security and inconvenience. For these problems, a design scheme of a laser warning testing sys.tem based on wireless control is proposed. The corresponding deflecting angle of the warning unit is contThe traditional laser warning testing system has the problems of low angle testing efficiency, poorcoding accuracy, low security and inconvenience. For these problems, a design scheme of a laser warning testing sys.tem based on wireless control is proposed. The corresponding deflecting angle of the warning unit is controlledthrough wireless remote control mode, so the signals with different patterns is emitted from the laser, and the warn.ing characteristics testing of the laser warning unit is completed. The programmable timer array (PCA) software tim.er mode inside the STC microcontroller is used to improve the accuracy of the pulse timing, and the wireless remotecontrol is used to turn the laser on and off. The applications show that the design scheme has the advantages of con.venience in testing and operation, and the testing efficiency and safety are improved..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 2, 41 (2020)
Wide-range, Fast and High Precision Scanning Technology Based on Rotational Double Prisms
LI Jin-ying, CHEN Ke, PENG Qi, WANG Zhong-ke, AN Tao, MA Hao-tong, and XIANG Chun-sheng
Wide-range, fast, and high-precision scanning is a key technology in the fields of electro-optical de.tection, laser radar and infrared countermeasures. It is difficult to balance these indicators with traditional scanningmethods. Firstly, the advantages of rotational double prisms for wide-range, fast and high-precisiWide-range, fast, and high-precision scanning is a key technology in the fields of electro-optical de.tection, laser radar and infrared countermeasures. It is difficult to balance these indicators with traditional scanningmethods. Firstly, the advantages of rotational double prisms for wide-range, fast and high-precision scanning are ana.lyzed. Secondly, the principle and method of forward and reverse scanning are introduced, and different algorithmsof reverse scanning such as first-order approximation method and vector optical method are analyzed. Finally, the ro.tational double prisms fast scanning simulation system is established. The validity and accuracy of the two reversescanning methods are verified and tested. The results show that, in the scanning range of ±1.5°, the accuracy of thefirst order approximation is about 20", and the vector optical method is about 1". A new technical approach is pro.vided for wide-range, fast and high precision scanning applications..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 2, 44 (2020)
Synthesis of Novel Rigid Terphenyl Diamine and Application in Transparent Polyimide
JIANG Jian-jun, JIANG Peng-fei, LU Feng, and TU Guo-li
Traditional polyimide film’s color is yellow because of inter-and intra-molecular charge transfer complex (CTC). Based on molecular structure design, a new diamine named 3,5-di (2-trifluoromethyl-4-amino)-1-tri. fluoromethyl-tuluene is designed and synthesized. The new colorless polyimide film is prepared from the polyTraditional polyimide film’s color is yellow because of inter-and intra-molecular charge transfer complex (CTC). Based on molecular structure design, a new diamine named 3,5-di (2-trifluoromethyl-4-amino)-1-tri. fluoromethyl-tuluene is designed and synthesized. The new colorless polyimide film is prepared from the polymeriza.tion between the diamine and the dianhydride 6FDA through one-step method. Through infrared absorption spectra (FTIR), UV-vis transmittance and thermal performance (DSC/TGA) testing on the polyimide film, experimental re.sults that the polyimide film has a high degree of imization, high visible transmittance, maximum transmittance of88.9% and high glass transition temperature, which Tg is 275.48℃, high thermal decomposition temperature Td5% is 550℃, and Td10% is 582℃..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 2, 49 (2020)
An Optical Controlled Beam-forming Network Based on Wavelength Division Multiplexing
WU Peng-sheng, WANG Kai, and LI Lin
An optical controlled beam-forming network based on wavelength division multiplexing technologyis proposed. The core of the system consists of wavelength-division multiplexers, adjustable attenuators and an opti.cal delay module built of optical reflectors. The time delay between channels is obtained by adjusting the oAn optical controlled beam-forming network based on wavelength division multiplexing technologyis proposed. The core of the system consists of wavelength-division multiplexers, adjustable attenuators and an opti.cal delay module built of optical reflectors. The time delay between channels is obtained by adjusting the optical pathof the optical reflectors. Two optical delay modules of 16 channels with beam direction of 0° and -45° at 18 GHz arefabricated. Testing results show that the phase accuracy of the modules is ±15° and the amplitude consistency isbetter than ±0.1 dB. The simulation pattern shows a higher beam pointing accuracy..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 2, 56 (2020)
Single-personmulti-pose Image Generation Method Based on Unsupervised Learning
ZHANG Jing, SUN Jin-gen, CHEN Liang, and LIU Yun-ting
Aiming at the problems of small sample data and single feature of the person data collected in thefield of visual surveillance, a method of generating a desired person pose image with a bidirectional generative ad.versarial network with high visual perception constraints is proposed. A single image of a given characterAiming at the problems of small sample data and single feature of the person data collected in thefield of visual surveillance, a method of generating a desired person pose image with a bidirectional generative ad.versarial network with high visual perception constraints is proposed. A single image of a given character and atwo-dimensional skeleton of a desired pose are used as inputs to a bidirectional generation adversarial network togenerate an image with the desired pose of the target person. The generated expected pose image is mapped back tothe original pose image, and a small number of images are used for learning in an unsupervised learning manner togenerate a high-quality image of the character′s desired pose. The proposed method is tested on the DeepFashionpublic data set. The results show that the image structure similarity (SSIM) generated by the method is 0.28 higherthan that of previous methods, which effectively improves the image generation quality of single-personmulti-pose based on unsupervised learning..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 2, 60 (2020)
Optimization Design of LED Ceiling Lamp Life
LI Hui-xiu, and ZHAO Li-na
For the problem of the life of LED affecting by high temperature, a more perfect optimization designmethod is proposed. Through analyzing the factors affecting the life of LED lamps, it is pointed out that temperatureis the key factor affecting the life of LED lamps. The analysis of the reason of MOSFET serious heatingFor the problem of the life of LED affecting by high temperature, a more perfect optimization designmethod is proposed. Through analyzing the factors affecting the life of LED lamps, it is pointed out that temperatureis the key factor affecting the life of LED lamps. The analysis of the reason of MOSFET serious heating is focusedon. And a feasible optimization scheme is put forward, that is, the optimization design of LED chips in series andparallel, and the experiment is carried out. The experimental results show that the temperature of MOSFET can beeffectively reduced about 10 ℃ by changing the arrangement of LED chips, which proves the feasibility of the opti.mal design..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 2, 65 (2020)
Preparation of Short Wave Pass Filter by Multi Angle Spectrum Measurement
ZHANG Jin-bao, SHI Cheng-bo, and GENG Hao
The reason for the deviation of the spectrum curve between the theoretical design and the actualpreparation of the short wave pass filter and the correction method are discussed in detail. At first, the high and lowrefractive index materials are selected to design the short wave pass filter system. And then, the actualThe reason for the deviation of the spectrum curve between the theoretical design and the actualpreparation of the short wave pass filter and the correction method are discussed in detail. At first, the high and lowrefractive index materials are selected to design the short wave pass filter system. And then, the actual film systemis prepared. Due to the control error of the coating machine, the actual film preparation thickness deviating from thetheoretical thickness, the actual preparation spectral curve out of tolerance is produced. By using multi angle spec.trum measurement method to measure the preparation results, according to the curve deviation from multi measure.ment results, the film material resulting film thickness deviation, the deviation size and direction are determined.After correcting the film thickness deviation, the short wave pass filter with flat spectral curve is prepared. And theshort wave pass filter film with better spectral performances can avoid the chromatic aberration effect of optical sys.tems..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 2, 70 (2020)
Safety Design of Airborne Electronic Equipment in Complex Electromagnetic Environments
WANG Bo, and SUN Li-cai
Some problems are solved by the safety design of airborne electronic equipments in complex electro.magnetic environments. Firstly, the safety problems caused by the work disorder of airborne electronic equipmentswhich are caused by electromagnetic induction and coupling. Secondly, the safety problems are caused by mal Some problems are solved by the safety design of airborne electronic equipments in complex electro.magnetic environments. Firstly, the safety problems caused by the work disorder of airborne electronic equipmentswhich are caused by electromagnetic induction and coupling. Secondly, the safety problems are caused by mal func.tion when induced voltage or current produced by electromagnetic induction and electromagnetic coupling reachesor exceeds the relevant performance characteristics with the airborne electronic equipments working properly. Final.ly, the importance and necessity of the electromagnetic environment safety design of the airborne electronic equip.ments are showed through introducing a situation of the electromagnetic safety design for a typical airborne electron.ic equipment in a complex electromagnetic environment..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 2, 74 (2020)
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