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浏览/检索结果: 共7条，第1-7条 帮助 限定条件 内容类型：会议论文    专题：长春光学精密机械与物理研究所    第一署名单位    第一作者单位    通讯作者单位     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Design and analyze of optical system for high-speed three-channel framing camera 会议论文 2013 2nd International Conference on Mechatronics and Control Engineering, ICMCE 2013, August 28, 2013 - August 29, 2013, Dalian, China Liu C. Y.; Xu T. Q.; Xu Z. 收藏  |  浏览/下载：50/0  |  提交时间：2014/05/15 Friction torque measurement of servo mount based on stribeck model 会议论文 2013 International Conference on Energy Research and Power Engineering, ERPE 2013, May 24, 2013 - May 25, 2013, Zhengzhou, Henan, China Liu W.; Li Y. X.; Meng H. R. 收藏  |  浏览/下载：10/0  |  提交时间：2014/05/15 Parameters estimation of BLDC motor for energy storage system (EI CONFERENCE) 会议论文 10th World Congress on Intelligent Control and Automation, WCICA 2012, July 6, 2012 - July 8, 2012, Beijing, China Wu J. 收藏  |  浏览/下载：15/0  |  提交时间：2013/03/25 This paper presents a statistical method to estimate the parameters of the brushless dc (BLDC) motor of a flywheel system for energy storage. The principle of the estimation is based on least square estimation under a reasonable constraint. Method is suitable to avoid using complicated test apparatus. Torque constant  static friction coefficient  vicious friction coefficient and inertia moment can be estimated. Furthermore  copper loss  iron loss  mechanical loss and other loss can be computed from these estimation and measurement data. By the proposed method  it is demonstrated experimentally that accuracy estimation can be achieved. 2012 IEEE.   Design of real-time small target detection system for infrared image based on FPGA (EI CONFERENCE) 会议论文 2010 International Conference on Optics, Photonics and Energy Engineering, OPEE 2010, May 10, 2010 - May 11, 2010, Wuhan, China Qu F.; Liu J.; Xu H.; Ye X.; Yang D.; Wang J.; Piao R.; Wu H.; Sun Q. 收藏  |  浏览/下载：15/0  |  提交时间：2013/03/25 A simple detection measurement is developed for realtime small target detection in infrared background  which can be easily available on FPGA. Basing on the difference between target and background  a predictive background is generated via restraining the infrared background with median filter  and then global threshold segmentation is used to residual image for further processing. Taking advantage of the relationship of targets in frames  a comprehensive analysis of residual image is made  and then the precise position of target is got by removing pseudo-objectives. Experiment results show that the method is simple to apply to hardware system  improve the system's false alarm rate and meet the requirements of practical engineering. 2010 IEEE.   Shape and alignment measurement of the heliostat by laser deflectometry (EI CONFERENCE) 会议论文 Optical Modeling and Measurements for Solar Energy Systems II, August 13, 2008 - August 14, 2008, San Diego, CA, United states Xu W.; Lu Z.; Liu H.; Zhang H.; Ni Z. 收藏  |  浏览/下载：13/0  |  提交时间：2013/03/25 In the solar tower thermal power generation system  such apparatus and corresponding software packages are developed. With the help of these two apparatus  (hexagon)  the precision of the slope angle of the heliostat is the major factor  the heliostat of 1002  for the 1MWe solar tower power plant in Beijing are measured and connected successfully.  which influences the efficiency of the system  consisting of 55 mirror facets of 1.8182 m2  consequently  this angle should be tested accurately. In this paper  the methods based on laser deflectometry are proposed to measure the shape error of the mirror facet and the connected error of the facets   Research on 10.6 m laser beam monitoring in CO2 laser processing system (EI CONFERENCE) 会议论文 Infrared Materials, Devices, and Applications, November 12, 2007 - November 15, 2007, Beijing, China Shi Y.; Gao Y.; Deng W.; Shao S. 收藏  |  浏览/下载：19/0  |  提交时间：2013/03/25 It is a key point of CO2 laser beam monitoring in the CO 2 laser processing system to achieve alignment between CO2 laser and PL (pointing and launching) system. By monitoring the angle offset of CO2 laser beam  the compensation can be gotten witch is given to fast-steering mirror to rectify the direction of laser beam. But the normal photoelectric detector can not get the laser signal because of CO2 laser's high energy and long wavelength. Its wavelength is 10.6m and its power can reach kW level. Consequently  it is difficult to detect the high-energy 10.6m laser beam directly. So  we monitored the output mirror of laser resonator superseded the laser beam  indirectly. The laser beam monitoring system could be designed based on CCD laser auto-collimation angular measurement principle and image processing method. In this paper  application of CCD laser auto-collimation angular measurement principle and image processing method for CO2 laser beam monitoring system is introduced particularly  After design  fabrication and alignment  the monitoring system can be used for experimental study that including angular measurement accuracy and angle offset measurement of CO2 laser beam. Angle offset range and angle variation rule of CO2 laser beam is also can be acquired for further research.   Research on the affect of differential-images technique to the resolution of infrared spatial camera (EI CONFERENCE) 会议论文 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, July 8, 2007 - July 12, 2007, Chengdu, China Jin G.; An Y.; Qi Y.; Hu F. 收藏  |  浏览/下载：12/0  |  提交时间：2013/03/25 The optical system of infrared spatial camera adopts bigger relative aperture and bigger pixel size on focal plane element. These make the system have bulky volume and low resolution. The potential of the optical systems can not be exerted adequately. So  one method for improving resolution of infrared spatial camera based on multi-frame difference-images is introduced in the dissertation. The method uses more than one detectors to acquire several difference images  and then reconstructs a new high-resolution image from these images through the relationship of pixel grey value. The technique of difference-images that uses more than two detectors is researched  and it can improve the resolution 2.5 times in theory. The relationship of pixel grey value between low-resolution difference-images and high-resolution image is found by analyzing the energy of CCD sampling  a general relationship between the enhanced times of the resolution of the detected figure with differential method and the least count of CCD that will be used to detect figure is given. Based on the research of theory  the implementation process of utilizing difference-images technique to improve the resolution of the figure was simulated used Matlab software by taking a personality image as the object  and the software can output the result as an image. The result gotten from the works we have finished proves that the technique is available in high-resolution image reconstruction. The resolution of infrared spatial camera can be improved evidently when holding the size of optical structure or using big size detector by applying for difference image technique. So the technique has a high value in optical remote fields.