Abstract: A kind of gesture recognition algorithm of image processing based on 3D Kinect is proposedThe dynamic gesture recognition algorithm is performed by skeleton images and depth imagesAt first,two skeleton points which are nearest to hands are choosen from 20 skeleton points in a skeleton imageThe process of tracking hands is performed by tracking the positions of the two skeleton pointsThen the dynamic gesture recognition pro cess is realized by the change of depths of hands(the distance between a hand and a camera)

Abstract: The classifications and characteristics of electro-optic masts are discussed based on the vehicle electro-optic mast system as the principal part.The application status and key technologies of electro-optic masts are summarized.The development trend of electro-optic masts technology is analyzed,which can provide references for the research and application of electro-optic masts.

Abstract: In areas of high-precision position tracking and the quality improvement of servo system,traditional PID control has shown a lot of defects.The control interference and measure noise from the system deeply affect the tracking accuracy of servo system.According to the control problems of controlled targets in actual operation,the traditional PID control algorithm is improved.A control method which combines a repetition control compensa tion PID with a Kalman filter with feedforward compensation is proposed.By stimulation experiments testing,the control method can be used to track periodic input signals and has good suppression random disturbances and ro bustness.

Abstract: According to the identical border requirement of thermal loads in a chassis,the thermal-power consumption of electronic function modules and the heat flux density of a thermal runaway surface at thermal sta bility state are analyzed and calculated.The integral thermal runaway characteristic is analyzed by calculating the hot flow density value which is from cooled natural convection air between the chassis and outside.And the re sults are compared with the hot flow density threshold of air natural convection thermal runaway.Based on this,the simulation of CAD numerical sample is completed by simulation software UG NX7.5.CFD and thermal simu lation analysis are performed by thermal simulation analysis software of ANSYS Icepak limited elements.Param eters assumption and grids plotting of the chassis are completed.Accurate calculations of thermal simulations are performed to validate the thermal design reliability of the chassis and provide references for thermal simulation analysis and thermal runaway optimum design of other similar electronic equipment.

Abstract: According to the choice of fusion rules,a fusion algorithm based on non-subsampled Contourlet transform(NSCT)is proposed for infrared polarization and light intensity image fusionFirstly,the NSCT is used to perform the multi-scale and multi-direction decomposition of the source imagesThen the low frequency sub-band coefficients and high frequency sub-band coefficients of the fused images can be obtained by the fu sion rules based on the local energy and regional characteristic of the targetThe experimental results show that the local standard deviation increases by 342%,the local coarseness increases by 127% and the contrast increas es by 967%,by comparing with the fusion rules of weighted average and maximum absolute value

Abstract: Aiming at the target detection from tens to hundreds of meters,a project of receiving and processing of short-range pulse laser detection is proposed.The detection receiving optical system and automatic gain control curve are designed particularly,the combination focus of double lens is analyzed and calculated,and the receiving optical system is validated and optimized farther by the software simulation method.In the design of automatic gain control curve,for characteristics of AD558 chip,the designs of automatic gain control and amplifier circuits in CPLD chip are described,and the automatic gain control curve circuit is simulated.The experiment shows that the detection effect is very good.

Abstract: Design of pulse laser detection circuit is very important in the laser applications,according to the characteristics of the pulse laser,the design of the pulse laser detection circuit is studied from three aspects which are the detection capability,response time and stability.Three main parts of the photoelectric detection system are discussed,which are the photoelectric detector,photoelectric conversion circuit and detector bias circuit.The selection of the photoelectric detector,photoelectric conversion characteristics of the circuit with resistance and photoelectric conversion characteristics of the circuit with transconductance amplifier are analyzed,which offers the reference to the design of the laser detection system.

Abstract: According to the characteristics of the UV communication signals in free space near surface layer,based on the modulation methods of UV signals,the frequency-choosing characteristics and specifications of ampli fiers are proposedBased on the predetermined specifications,frequency-choosing circuits and three-level amplifi cation circuits are designedThe overall characteristic curves can meet the requirements of actual application for gains modulation circuits,which can perform gain compensation and gain trimmingThe simulation results by Multi sim shows that: the amplifier has continuously adjustable gains magnification between 10 000～100 000 at the cen ter frequency of 30 kHz and 50 kHzAnd the bandwidth near center frequency is about 2 kHz,the equivalent input noise voltage is ≤5 nV/ Hz~(1/2) @30 kHz、50 kHzThe amplifier is more suitable for magnifying weak UV signals near surface layer for using low-noise apparatus,which provides certain reference value for actual application

Abstract: The extinction principle of the smoke screen is explained,the infrared extinction coefficient is the basic foundation to assess the infrared extinction performance.The three test methods of the infrared extinction co efficient are introduced: the testing methods of Fourier spectrometer,infrared radiometer and thermal imager,and the testing method of infrared extinction coefficient for thermal imager is discussed further.The thermal imager can assess the extinction performance of the smoke screen materials by testing the extinction coefficient of the materi als.

Abstract: To overcome the shortcomings such as big volume,big noise and limited control precision of the tra ditional temperature control system of the semiconductor laser,a temperature control system of the semiconductor laser is developed based on the MSP430F449 single chip and DS18B20 digital temperature sensor.In the system,the drive current is controlled by using PWM pulse width modulation and combining with PID algorithm,so the constant temperature of the laser is controlled.The experiment results show that the temperature control precision of the system is better than ±0.1 ℃,and steady temperature condition can be offered for the semiconductor laser.

Abstract: The opto-electronic countermeasure is an important part of the electronic countermeasure.With the fast development of military opto-electronic equipments,the status of opto-electronic countermeasure becomes higher and its influence is more prominent.Firstly,the system of the opto-electronic countermeasure is discussed from the opto-electronic reconnaissance,opto-electronic jamming,opto-electronic anti-reconnaissance and op to-electronic anti-jamming.Then,combining the technology development with the typical battle,the development history of the opto-electronic countermeasure is introduced from the visible countermeasure,infrared countermea sure and laser countermeasure.Finally,the research focus and future trends in the field of opto-electronic counter measure are summarized comprehensively.The research results are helpful for understanding and grasping the op to-electronic countermeasure technologies.

Abstract: The Internet of things is a current hot topic,and optical fiber sensor technology application in the In ternet of things has already caused wide concern.The Internet of things is consisted of four levels.They are user and application interface,data processing technology,data transmission network and sensor network.A large num ber of varied sensors are needed in the Internet of things.Sensor can perceive all kinds of environmental parameters like temperature,gravity,photo-electricity,sound,displacement and vibrate to provide the original data informa tion.The structure of the sensor,classification,and its applications in the Internet of things like optical fiber gyro,optical fiber hydrophone,optical fiber grating sensor and optical fiber current sensor are introduced.Forefront appli cation in the Internet of things of continuous distributed optical fiber sensing technology based on Brillouine effect is also introduced.

Abstract: Based on the FPGA hardware resources,a FPGA in the logic circuit design is presented to achieve the two-point correction.The floating-point adder,floating-point divider,floating-point multiplier and the inter nal RAM,ROM memory in FPGA can be used to calculate the correction factors in real time,and then the non-uni formity correction is completed on the linear array infrared detector,thus the correction accuracy is ensured.At the same time,the coefficient and the reading of image data can be completed in a clock cycle by using the parallel pro cessing ability of the FPGA.

Abstract: The method of self coupling transform is adopted to design a small and low power consumption bias circuit suitable for low voltage and 5 V to 100～600 V transform is realizedThe voltage resistance require ments of voltage boosters are reduced,the circuit structure is simplified and the volume and power consumption of detection circuit are also reducedSo the detector can be miniaturized

Abstract: According to noise jamming existing in ultraviolet imaging process,typical UV imaging system are researched for acquiring high quality UV images and inspecting targets accurately.The reasons that noise jam ming exists in ultraviolet imaging process are analyzed.The scene models of ultraviolet targets are established.Based on this,the restoration methods of ultraviolet images are researched.Single image is performed threshold processing so as to cut out background noise.Then multi-frame continuous images are performed average pro cessing and time-recursive filtering.Better image output is got after threshold segmentation process.Based on output results of images,the random noise from ultraviolet images can be removed effectively by multi-frame im age average processing and time-recursive filtering.Especially the method of time-recursive filtering has better effect on image restoration.

Abstract: The performance of electro-optical detection system is affected by the design of electro-optical circuit.The performance of electro-optical detection circuit is simulated based on PSpice EDA software.The PSpice model of photodiode,the characteristics of time domain,frequency domain and noise are analyzed.Ac cording to the parameter scanning function of PSpice software,the circuit parameters are optimized.Based on the noise analysis function of PSpice software,NEP and post-stage circuit design parameters of the system are calculated.

Abstract: The formation and development history of prognostic and health management(PHM) are reviewed,the differences between PHM and traditional test technology are compared from leading idea,key technology,appli cation level and fault response method.The basic principle of PHM is discussed.The condition based maintenance(CBM) is proposed by introducing the health status classification and health degradation process of the system,the differences between CBM and breakdown maintenance and periodic maintenance are also analyzed.According to the capacity requirement of PHM,the task and flow are discussed.Aiming at the typical PHM technology based on the sensor system,the system composition is introduced,and the selection principle of the sensor system is studied combing with the practical application.Some advice about key technologies such as PHM method and selection of monitoring parameters are given.

Abstract: In order to enhance the efficiency of imaging monitoring,the short-range ocean surface monitoring usually obtains the high-definition and high-resolution images under the low illuminance.Compared with the tradi tional infrared imaging monitoring,lidar is an active imaging technology,which can obtain the intensity and range image(4D image),so it has the high detection and recognition probability.The development status and technology advantage of U.S.streak tube imaging lidar(STIL) are analyzed.The principles of the flash type system,one-time imaging and high-speed data acquisition are discussed.The streak tube imaging lidar can be used in the short-range ocean monitoring,and can also be combined with other sensor,such as passive infrared and microwave radar to im prove the monitor efficiency.

Abstract: Based on the principle of diffraction for circular aperture,a comparison of characteristic between Fresnel diffraction and Fraunhofer diffraction is made.Integrating with light-intensity Airy disc distributing char acteristic of Fraunhofer diffraction,a measurement method of laser beam divergence angle based on Fraunhofer diffraction is proposed.By collecting,analyzing and disposing far-field laser facula on the basis of arranging la ser target,the real test values of laser beam divergence angle are gained.The test result shows that more precision can be got with the method.And the factors influencing on measuring precision are analyzed.The method will af ford a scientific guidance for laser parameter outfield measurement.

Abstract: The ultraviolet(UV) laser interaction with semiconductors has a considerable interest in recent years.The applications of UV laser interaction with semiconductors are reviewed,including photon-electron in dustry,laser machining and laser surface modification.The theory of UV laser interaction with semiconductors is introduced,and the theory model of UV laser ablation on the semiconductor is summarized,including heat con duction model,carrier coupling diffusion model,photochemical model,thermal surface vaporization model,dou ble-temperature model and laser induced surface charging model.The experimental results of damage morpholo gy,ablation threshold and mechanisms of semiconductor damaged by UV laser ablation are summarized.The pro posals of possible research and new application field of UV laser interaction with semiconductors are presented.