Resolution is one of the important performance indicators of the visible light observation system's ability to identify targets. It is usually detected by the visible light performance test equipment in the laboratory, but the experimental environment is relatively ideal, and the influence of atmospheric factors on the television observation system is not considered. Therefore, this paper proposes a visible light target with adjustable brightness angle, which is the resolution of VISIBLE LIGHT observation system under different weather conditions The outdoor test provides conditions for the development of identification ability related detection work.
According to the influence of light intensity fluctuation, source and image jitter and beam expansion, the paper studies the following aspects: 1. the maximum ranging equation for small target is analyzed, considering the influence of atmospheric introduction, the key indexes affecting laser remote ranging ability are analyzed; 2. the existing test methods are analyzed and their limitations are put forward; 3. combined with the far field test environment, the improved test method is put forward.
Aiming at the current testing requirements of optoelectronic products, a portable target simulation system with adjustable radiation band was designed.The optical design of the system adopted a total reflection structure, and the radiation source adopted a combination of black body and visible light, covering the wavelength band of 0.4 μm to 12 μm.In order to facilitate the use of the product, an electronic shutter was installed to realize the disappearance and appearance of the target. By switching different wavelength filters, the switching and combination of medium wave, long wave, visible light and other radiation bands could be realized. The final design achieved an effective aperture of Φ200mm, a field of view of 2°, a parallel difference of 9", and a focal length of 1500mm.The target simulator works well after delivery
Ranging ability is one of the core indicators of laser ranging equipment. The actual ranging test has certain requirements for the visibility conditions and cooperative targets. Generally, there is no suitable cooperative target for ranging, which affects the acquisition of real sample data or the assessment of actual ranging ability. In this paper, a mobile laser ranging cooperative target is proposed, which can effectively establish the ranging environment in the real scene It provides strong support for the debugging and testing of laser ranging equipment.
In this paper, a device for fast energy measurement and spot quality measurement for large aperture laser illuminator is designed. The device has compact structure, small volume and high sensitivity. It can quickly test the energy and spot performance of the structural detector on line, and provide a test environment for evaluating the performance index of the structural detector.
KEYWORDS: Target detection, Computer simulations, Control systems, 3D modeling, 3D acquisition, Structural design, Finite element methods, Spindles, Motion models
The recognition and tracking ability[1-4] of detection equipment in the process of relative movement with the observed target is always one of the key research contents and important research directions of photoelectric detection technology. Aiming at the relative angular position between the target and the detection equipment, this paper designs a kind of relative motion simulation equipment which can independently control the bearing two axes. The motion range of the platform carrying the measured equipment can reach ± 120° , the positioning accuracy is better than 10 ″ , the maximum angular velocity and angular acceleration can reach 60°/ s and 40°/s2 respectively. The target motion range can reach ± 150° , the positioning accuracy is better than 10 ″ , and the maximum angular velocity and angle acceleration can reach 60°/s and 60°/s2 respectively.
This paper presents a retractable infrared laser characteristic fusion target design configuration. In this configuration, the folding mechanism provides the retraction and playback function to drive the simulated target to extend in the length direction, and the extension length can be adjusted according to the background and scene requirements. The simulated target has both infrared and laser characteristics, which can provide a fixed laser reflectivity and cross-sectional area of the characteristic body target. At the same time, the characteristic body target has infrared radiation characteristics of 3~5um and 8~12um bands, respectively, for detection and recognition of high-sensitivity infrared detector, and for the verification of laser range finder's ranging ability.
Vibration is one of the main factors that greatly affect the tracking and stability of photoelectric detection. With the development of technology for many years, the simulation of vibration conditions has gradually developed from single line vibration or angle disturbance to line angle compound vibration. In this paper, the working principle and application of two kinds of multi-degree of freedom line-angle composite vibration system are introduced, and the differences between the two main mechanisms and simulation systems are compared and analyzed, which provides a theoretical support for the photoelectric detection technology to carry out the vibration reproduction test in the laboratory.
The laser anti-collision imaging radar is composed of the following key technologies: high beam quality, high repetition frequency, high power laser shooting machine technology, high sensitivity-high precision receiving technology, high efficiency-fast and linear optical scanning technology, and fast image processing and obstacle recognition and warning technology, etc. This paper studies on the key technology above.
KEYWORDS: Laser applications, Laser systems engineering, Unmanned aerial vehicles, Laser processing, Signal detection, Power supplies, Control systems, Signal processing, Airborne laser technology, Pulsed laser operation
This paper introduced some kind of rapid an accurate detected laser system using on UAV. Composing, function and key technology of this system were discussed. A kind of detected system with character of miniaturization and lightweight was designed. This system can be used on UAV and detect rapidly an accurately.
KEYWORDS: Control systems, Gyroscopes, Control systems design, Structural design, Navigation systems, Finite element methods, Safety, Servomechanisms, Human-machine interfaces, Error analysis
Gyro stabilized platform is sensitive to external angle change, and is mainly used to effectively isolate the influence of angle disturbance on the attitude maintenance of stabilized platform[1-3]. In order to provide the simulation environment of external angle disturbance for the stable platform[4], this paper designs an azimuth and pitch two-dimensional angular motion excitation device, which can effectively simulate the low-frequency angular disturbance condition below 20Hz. The angular motion range can reach ±50°azimuth, and the pitch axis can reach ±70°. The positioning accuracy is 10″. The device provides a good man-machine interface, which can display the motion data of each axis in real time. At the same time, considering the safety of use, the design has electrical, software and mechanical multi-level limit measures, which can realize automatic monitoring and system protection.
KEYWORDS: Infrared radiation, Ranging, Temperature sensors, Temperature metrology, Resistance, Laser optics, Copper, Platinum, Infrared lasers, Control systems
In this paper, a design configuration of infrared guiding source for laser cooperative target is proposed. In this configuration, the infrared radiation target surface can effectively reduce the heat dissipation speed and ensure the uniform distribution of temperature radiation at the edge and the center by setting a wind shield, an independent edge circular electric heating film and a temperature PID control loop. It can provide effective infrared characteristic target for infrared / laser common optical path ranging system and guide laser ranging accurately.
In order to improve the readability of infrared image, this paper proposes an image fusion algorithm based on the characteristics of the target region. The algorithm uses wavelet transform to decompose the multi-source image, and uses image segmentation algorithm to extract the target features of the multi-source image, and then uses different fusion strategies to fuse the infrared image and the visible image according to the features of the infrared image extraction and the low-frequency and high-frequency components of the visible image in different regions. The simulation results show that the algorithm can achieve better image fusion results.
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