Journals >Electro-Optic Technology Application
Contents
2020
Volume: 35 Issue 4
17 Article(s)
Export citation format
[in Chinese]
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 4, 1 (2020)
Design of Low F-Number LWIR Off-Axis Hybrid Imaging Optical System
WANG Zi-ying
A long wavelength infrared off-axis hybrid imaging optical system with 1.67 f-number is introduced. The secondary imaging structure is adopted in the system. The optical aperture is compressed by a large aperture off-axis refractive reflector set in front of the first imaging, and the aberration of the system is compenA long wavelength infrared off-axis hybrid imaging optical system with 1.67 f-number is introduced. The secondary imaging structure is adopted in the system. The optical aperture is compressed by a large aperture off-axis refractive reflector set in front of the first imaging, and the aberration of the system is compensated by a small aperture hybrid refractive diffractive relay lens set after the first imaging. Through the optimization design analysis of the optical system, the transfer function value in full field of view is more than 0.45 at 20 lp/mm, the dispersion circle root diameter value in full field of view is less than 25 μm, the full field of view distortion of the lens is less than 1%, and good image quality is got. The longest aperture of the system is 300 mm, which is suitable for long wavelength infrared imaging sensors on platforms..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 4, 1 (2020)
Design and Implementation of Electro-optical Tracking and Pointing Turntable Control System
JIA Qi, and SUI Yin
The design and implementation of an electro-optical tracking and pointing turntable control system is introduced. Based on the traditional PID control algorithm and the attenuation of high frequency signal by the lag link, the position loop is optimized. In the small error range, PI and double lag link series correctioThe design and implementation of an electro-optical tracking and pointing turntable control system is introduced. Based on the traditional PID control algorithm and the attenuation of high frequency signal by the lag link, the position loop is optimized. In the small error range, PI and double lag link series correction is used. Simulation results show that the proposed control algorithm improves the bandwidth, stability and tracking accuracy of the system. And the design is applied to an electro-optical tracking and pointing turntable and the tracking accuracy is within 20″ (RMS)..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 4, 5 (2020)
Optical Design of Infrared Zoom Microscope System with Long Working Distance
WU Fan, LI Sen-sen, and LAN Xi-rui
Infrared thermal microscope imaging system can be used to analyze the temperature changes of tiny objects or the local details, which has been widely used in industrial detection, medical diagnosis, scientific experimental research and other fields. The design method of the infrared zoom microscope optical system is anInfrared thermal microscope imaging system can be used to analyze the temperature changes of tiny objects or the local details, which has been widely used in industrial detection, medical diagnosis, scientific experimental research and other fields. The design method of the infrared zoom microscope optical system is analyzed, and an optical system with an imaging magnification of 0.5 ×~2 × is designed based on the refrigeration infrared detector. Mechanical compensation zoom is used in the system. The cooling diaphragm of the detector is matched with the pupil of the optical system by the secondary imaging configuration. The higher-order aberration is corrected by the two aspherical surfaces on eight lenses. And the smooth and continuous zoom in the full magnification range is realized. Through the analysis of zooming process by ZEMAX macro program, the optical system is designed with smooth movement, stable imaging and small change of dispersion spots during the whole zooming process..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 4, 9 (2020)
Research on Laser Warning Networking Layout and Data Fusion Technology
ZHANG Sheng-chong, WU Zhuo-kun, and XU Shi-wei
The principle of laser warning and the radiation model is introduced. The networking layout of laser warning equipments and the methods of data fusion are analyzed. The layout graphics, distance, detection probability, false alarm rate and the calculation method of multi-station locating are researched. The validity ofThe principle of laser warning and the radiation model is introduced. The networking layout of laser warning equipments and the methods of data fusion are analyzed. The layout graphics, distance, detection probability, false alarm rate and the calculation method of multi-station locating are researched. The validity of the laser warning networking method is verified through computer simulation..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 4, 15 (2020)
Experimental Research on Infrared Temperature Measurement Characteristics of Laser Processed Silicon Materials
ZHAO Wan-li, and WANG Bi-yi
Experimental research on silicon materials irradiated by 980 nm laser was performed in order to accurately obtain the temperature characteristics of semiconductor silicon materials during laser processing. The characteristic curves of silicon material are obtained by contacted and infrared non-contacted methods. And thExperimental research on silicon materials irradiated by 980 nm laser was performed in order to accurately obtain the temperature characteristics of semiconductor silicon materials during laser processing. The characteristic curves of silicon material are obtained by contacted and infrared non-contacted methods. And the characteristic change rules are analyzed under laser irradiation. Results show that the infrared radiation from laser irradiation is not only related to the temperature of the material, but also is related to incident laser wavelength, strength and time. For the temperature change of laser irradiation silicon material in real time not being correctly calibrated by the traditional non-contacted infrared temperature measurement method, a new calibration method is needed. The research is important to parameter calibration of non-contacted temperature measuring equipments during laser processing..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 4, 19 (2020)
Research on Digital Time Gain Control Technology of Cat-eye Target Detection
HU Bo, and GAO Lei
The electro-optical observation, aiming and reconnaissance devices with cat-eye effect have been a huge threat in modern battlefield. In order to realize the effective detection of cat-eye targets, the principle of laser detecting cat-eye is analyzed. According to the influencing factors of cat-eye efficiency, the concThe electro-optical observation, aiming and reconnaissance devices with cat-eye effect have been a huge threat in modern battlefield. In order to realize the effective detection of cat-eye targets, the principle of laser detecting cat-eye is analyzed. According to the influencing factors of cat-eye efficiency, the conclusion of the detection efficiency of cat-eye affected by cat-eye target, background and distance is given. Based on this, a digital time gain controller of laser detection system is designed, the flexible configuration of time gain control curve is realized, and the adaptability of laser detection system to different application environments is improved..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 4, 22 (2020)
Correlation Analysis of Multimodal Lie Features Based on Speech and Physiological Signals
JIA Jun-wei, and JIANG Nan
The correlation and value of multimodal lie features are researched. Due to the lack of single-modal features, the accuracy of lie recognition will be affected. Therefore, combined with objective speech and physiological signals, the lie correlation of formant frequency, speech energy, Mel-frequency cepstrum coefficienThe correlation and value of multimodal lie features are researched. Due to the lack of single-modal features, the accuracy of lie recognition will be affected. Therefore, combined with objective speech and physiological signals, the lie correlation of formant frequency, speech energy, Mel-frequency cepstrum coefficients, Gammatone frequency cepstrum coefficient, heart rate and other multimodal features based on statistical principles is analyzed. Experiments on ten subjects showed that the second and the third formants, Gammatone frequency cepstrum coefficient and heart rate have higher lie correlation, which provides theoretical and data support for the selection of lie features..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 4, 26 (2020)
Research on Vision Grabbing System of Pneumatic Bionic Arm Based on Deep Learning
SHI Zheng-jin, GENG Feng, ZHANG Xiao-shun, QIN Peng, and WANG Tian-yu
Aiming at the requirements of recognition accuracy and grabbing accuracy of target object for robot based on visual assistance, a vision grabbing system based on deep learning target detection method is proposed. Firstly, based on the improved depth learning-based target detection algorithm, the recognition of the captAiming at the requirements of recognition accuracy and grabbing accuracy of target object for robot based on visual assistance, a vision grabbing system based on deep learning target detection method is proposed. Firstly, based on the improved depth learning-based target detection algorithm, the recognition of the captured object is realized. Secondly, according to the method of Zhang Zheng-you's camera calibration, the end gripper flexible jaw and the depth camera are used for hand-eye calibration. Finally, the gripping experiment of the object is completed on the pneumatic bionic arm experimental platform. Experimental results show that compared with the traditional visual grabbing system, the grabbing system based on deep learning target detection can not only improve the recognition accuracy of the robot on the captured object, but also can adapt to the capture of multiple categories of objects in various complicated environments, and has achieved satisfactory results..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 4, 31 (2020)
Finite Element Analysis Method Based on Equivalent Transformation of Mixed Vibration Spectrum
XU Rong-ze, DA Xuan-xiang, and LIU Ye-lei
Based on the finite element modal analysis results, the equivalent random vibration analysis of equipment is completed by transforming the constant frequency sine plus random vibration spectrum into the acceptable boundary conditions of finite element analysis software. The displacement and stress response of the equivBased on the finite element modal analysis results, the equivalent random vibration analysis of equipment is completed by transforming the constant frequency sine plus random vibration spectrum into the acceptable boundary conditions of finite element analysis software. The displacement and stress response of the equivalent in the vibration environment is obtained. The vibration simulation analysis is carried out by using this method, and the analysis results show that the strength of the equipment meets the requirements of operation. And the correctness of the equivalent transformation method is verified by experiments..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 4, 36 (2020)
Research on Optical Fiber Delay Measurement
OUYANG Hong, WANG Xia, WEI Mu-ye, and YUE Yao-li
Optical fiber delay system is widely used in broadband and large dynamic RF optical links, optical transmission of clock and local oscillator signals, RF optical fiber remote and ultra-wideband phased array, and the accurate measurement of optical fiber delay and optical fiber length is the key technology to develop opOptical fiber delay system is widely used in broadband and large dynamic RF optical links, optical transmission of clock and local oscillator signals, RF optical fiber remote and ultra-wideband phased array, and the accurate measurement of optical fiber delay and optical fiber length is the key technology to develop optical fiber delay system. Several optical delay measurement methods are introduced in detail, and the characteristics and application scenarios are compared and analyzed..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 4, 41 (2020)
Modeling and Simulation of Pulse Doppler Radar System
LI Bin, WANG Lei, and ZHANG Shao-hua
With the development of science and technology, weapon system is threatened by more and more electronic interference. Computer simulation has the characteristics of safety, efficiency, economy and so on, which has become an important means in the field of radar and electronic countermeasures at present and in the futurWith the development of science and technology, weapon system is threatened by more and more electronic interference. Computer simulation has the characteristics of safety, efficiency, economy and so on, which has become an important means in the field of radar and electronic countermeasures at present and in the future. The modular design of Simulink is adopted to simulate the signal level of the pulse Doppler radar, and the radar simulation system is established. The user can modify the parameters of the radar through the simulation boundary, so as to simulate the radar performance that the user wants..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 4, 45 (2020)
Stress Analysis and Strength Check of Load Mounting Thread on Electro-optical Turntable
DA Xuan-xiang, and HE De-fang
In accordance with the load conditions of an electro-optical turntable, the force analysis of the connecting bolts is carried out. According to the load non-slip condition, the pre-tightening fore, the tightening torque and the maximum total pulling force are calculated. Based on the material strength theory and finiteIn accordance with the load conditions of an electro-optical turntable, the force analysis of the connecting bolts is carried out. According to the load non-slip condition, the pre-tightening fore, the tightening torque and the maximum total pulling force are calculated. Based on the material strength theory and finite element simulation and analysis technology, the stress analysis and strength check of bolts and thread teeth used for mounting load are carried out, and the results are compared and analyzed. The results of theoretical calculation and practical verification show that the thread stress analysis and strength check method described can make the thread connection structure between the electro-optical turntable and the load reliable. The method can be used as a reference for the design of the load mounting thread of the turntable..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 4, 54 (2020)
Structural Design and Finite Element Analysis of a Reflector
HE De-fang, XU Rong-ze, and YANG Hao
The reflector plays an important role in the optical system. A kind of reflector with orthogonal axis frame is designed, which contains a series of geometric symmetry elements. Its temperature rise and vibration resistance characteristics meet the use requirements. Compared with three common materials, the temperature The reflector plays an important role in the optical system. A kind of reflector with orthogonal axis frame is designed, which contains a series of geometric symmetry elements. Its temperature rise and vibration resistance characteristics meet the use requirements. Compared with three common materials, the temperature response and vibration response of the reflector structure are analyzed. The temperature field, thermal stress, mode, equivalent stress and strain of three kinds of reflectors with different material are obtained by using the finite element analysis software ANSYS Workbench. Analysis results show that the temperature response of cast iron HT300 is smaller and its vibration resistance is better, which has a wide application space in the engineering practice of optical system..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 4, 60 (2020)
Research on CAD/CAPP/CAM System Integration Technology Based on PDM
LI Zhi-yuan, and GAO Ying
With the improvement of computer information management technology and the deepening of enterprise information construction, how to integrate computer aided design (CAD), computer aided process planning (CAPP) and computer aided manufacturing (CAM) systems and realize the free conversion of data and information betweenWith the improvement of computer information management technology and the deepening of enterprise information construction, how to integrate computer aided design (CAD), computer aided process planning (CAPP) and computer aided manufacturing (CAM) systems and realize the free conversion of data and information between CAD, CAPP and CAM systems, so as to improve the product development efficiency, which is a problem that many enterprises pay more and more attention to. CAD, CAPP and CAM integrated system framework based on PDM is proposed, and the customization content and implementation technology involved in the implementation of the framework are researched in depth..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 4, 66 (2020)
Three-dimensional Wiring Design of Turntable Based on NX
GAO Lei, and LI Chen-xi
With a turntable line wiring as a research object, a three-dimensional wiring process design technology based on the routing electrical module of UG NX11 is proposed. Through analyzing the characteristics of the turntable wiring, the three-dimensional wiring process is designed, and the design input data is decomposed.With a turntable line wiring as a research object, a three-dimensional wiring process design technology based on the routing electrical module of UG NX11 is proposed. Through analyzing the characteristics of the turntable wiring, the three-dimensional wiring process is designed, and the design input data is decomposed. The design principle of three-dimensional wiring is planned, the wiring route is planned and connection and equipment relationship tables are invoked. So the three-dimensional wiring of the turntable is realized. Some problems such as lagging design and low wiring accuracy are resolved to improve the efficiency and quality of wiring..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 4, 71 (2020)
Summary of General Quality Characteristic Relationship of Equipment
ZHANG Jian, YU Shui-you, and WANG Lei
From the aspects of concept, purpose, characteristics, work flow and problems, a brief summary of the general quality characteristics of equipment is carried out. The interrelationships are researched and the possible research interest in future is pointed out. Moreover, its interrelationships is further explained combFrom the aspects of concept, purpose, characteristics, work flow and problems, a brief summary of the general quality characteristics of equipment is carried out. The interrelationships are researched and the possible research interest in future is pointed out. Moreover, its interrelationships is further explained combined with actual engineering case in the work of general quality characteristic, and based on which some suggestions are given at last..
Electro-Optic Technology Application
- Publication Date: Jan. 01, 1900
- Vol. 35, Issue 4, 76 (2020)
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20