机构

• 长春光学精密机械与... [10]
• 光电技术研究所 [1]
• 武汉岩土力学研究所 [1]
• 合肥物质科学研究院 [1]
• 软件研究所 [1]

采集方式

• OAI收割 [14]

内容类型

• 会议论文 [10]
• 期刊论文 [4]

发表日期

• 2024 [1]
• 2021 [1]
• 2012 [1]
• 2011 [8]
• 2010 [3]

学科主题

• Computer S... [1]

筛选

浏览/检索结果: 共14条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Atmospheric carbon dioxide profile detection with a continuous-wave differential absorption lidar 期刊论文  OAI收割 OPTICS AND LASERS IN ENGINEERING, 2024, 卷号: 180 作者:  Hua, Zhenzhen;  Huang, Jian;  Shi, Dongfeng;  Yuan, Kee;  Hu, Shunxing   |  收藏  |  浏览/下载：6/0  |  提交时间：2024/11/20 Differential absorption lidar (DIAL)  Carbon dioxide (CO 2 )  Scheimpflug imaging principle   Identification of geo-bodies in borehole radar image based on Curvelet transform 期刊论文  OAI收割 JOURNAL OF APPLIED GEOPHYSICS, 2021, 卷号: 189, 页码: 9 作者:  Li, Li;  Wang, Rui;  Peng, Tianxiang;  Hao, Jingyi;  Zhou, Zhipeng   |  收藏  |  浏览/下载：42/0  |  提交时间：2021/06/18 Ground Penetrating Radar  Imaging principle of GPR  Curvelet transform  Reflected energy  Identification of geo-bodies   The analyze and design of focusing system for space camera (EI CONFERENCE) 会议论文  OAI收割 2012 International Conference on Electrical Insulating Materials and Electrical Engineering, EIMEE 2012, May 25, 2012 - May 27, 2012, Shenyang, Liaoning, China 作者:  Yu T. 收藏  |  浏览/下载：27/0  |  提交时间：2013/03/25 In order to control the focal plane and guarantee the imaging quality of space camera  the focusing system was proposed. Firstly  the reasons of defocusing were analyzed and a solution method was given. Secondly  the system structure and operating principle were introduced. Thirdly  the system design was presented in detail. Finally  the system was experimented. Experimental results indicate that the defocusing amount of camera can be controlled below 10 um and the focusing system satisfies the requirement of system design. (2012) Trans Tech Publications  Switzerland.   The research on statistical properties of TDI-CCD imaging noise (EI CONFERENCE) 会议论文  OAI收割 International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Imaging Detectors and Applications, May 24, 2011 - May 26, 2011, Beijing, China Gu Y.-Y.; Shen X.-H.; He G.-X. 收藏  |  浏览/下载：23/0  |  提交时间：2013/03/25 TDI-CCD can improve the sensitivity of space camera without any degradation of spatial resolution which is widely used in aerospace imaging devices. The article describes the basic working principle and application characteristics of TDI-CCD devices  analyses the composition of TDI-CCD imaging noise  and propose a new method to analyze TDI-CCD imaging noise with statistical probability distribution. In order to estimate the distribution of gray values affect by noise we introduced the concept of skewness and kurtosis. We design an experiment using constant illumination light source  take image with TDI-CCD working at different stage such as stage 16  stage 32  stage 48  stage 64 and stage 96  analyse the characteristics of image noise with the method we proposed  experimental results show that the gray values approximately meet normal distribution in large sample cases. 2011 SPIE.   Study on spectrograph for ionosphere: A broadband imaging instrument prototype for far-ultraviolet (EI CONFERENCE) 会议论文  OAI收割 International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China 作者:  Wang S.-R. 收藏  |  浏览/下载：36/0  |  提交时间：2013/03/25 Current research on space-based exploration for the ionosphere needs more advanced technologies. Because the spectral signals in the ionosphere distributing basically in the far-ultraviolet waveband are very weak. Usual spectrometer structures and detectors such as CCD can't receive enough information. Based on this principle of atmospheric sounding  the imaging spectrometer prototype for ionosphere detection application was designed to solve the problem. This prototype consists of the telescope and the imaging spectrometer. The simple structure and small number of mirrors can help higher transmission efficiency be achieved and weak signals detection be implemented. The telescope is an off-axis parabolic mirror and the spectrometer is a modified Czerny-Turner spectral imaging system. Modified Czerny-Turner spectrometer contains a spherical mirror  a fixed plane grating and a toroidal mirror. By adjusting the incident angle to the collimating mirror and using toroidal mirror  coma and astigmatism were corrected well. We also optimize distances between the grating to the focusing mirror and the focusing mirror to the image plane to improve disadvantages of traditional Czerny-Turner structure. Designed results demonstrate that aberrations are substantially corrected  and high image quality can be obtained in broad waveband. The photon counting Wedge-Strip-Anode detector with micro-channel planes as the receiving plane is accepted for the instrument prototype. The other photon counting 2-D detector responding well for weak light such as Cross-Delay line detector and MAMA detector can also be used for detection. The calibration and performances testing system is made of a vacuum system  a deuterium lamp  a monochrometer and the instrument prototype. Results obtained from the experiment show that the spectral resolution is 2.4 nm and the spatial resolution is 80 m. The other calibration experiments are running. The technology of the spectrometer prototype is important for the research and applications of ionosphere remote sensing. 2011 SPIE.   Design of motion compensation mechanism of satellite remote sensing camera (EI CONFERENCE) 会议论文  OAI收割 International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China Gu S.; Yan Y.; Xu K.; Jin G. 收藏  |  浏览/下载：47/0  |  提交时间：2013/03/25 With the development of aerospace remote sensing technology  the ground resolution of remote sensing camera enhances continuously. Since there is relative motion between camera and ground target when taking pictures  the target image recorded in recording media is moved and blurred. In order to enhance the imaging quality and resolution of the camera  the image motion had to be compensated. In order to abate the effect of image motion to image quality of space camera and improve the resolution of the camera  the compensation method of image motion to space camera is researched. First  the reason of producing drift angle and adjustment principle are analyzed in this paper. This paper introduce the composition and transmission principle of image motion compensation mechanism. Second  the system adopts 80C31 as controller of drift angle  and adopts stepping motor for actuators  and adopts absolute photoelectric encoder as the drift Angle measuring element. Then the control mathematical model of the image motion compensation mechanism are deduced  and it achieve the closed-loop control of the drift angle position. At the last  this paper analyses the transmission precision of the mechanism. Through the experiment  we measured the actual precision of the image motion compensation mechanism  and compared with the theoretical analysis. There are two major contributions in this paper. First  the traditional image motion compensation mechanism is big volume and quality heavy. This has not fit for the development trend of space camera miniaturization and lightweight. But if reduce the volume and quality of mechanism  it will bring adverse effects for the precision and stiffness of mechanism. For this problem  This paper designed a image motion compensation that have some advantages such as small size  light weight at the same time  high precision  stiffness and so on. This image motion compensation can be applicable to the small optics cameras with high resolution. Second  the traditional mechanism control need to corrected  fitting and iterative for the control formula of mechanism. Only in this way  we can get the optimal control mathematical model. This paper has high precision of the control formula derived. It can achieve the high precision control without fitting  It also simplify the difficulty of control mathematical model establishment. This paper designed the range of adjusting of image motion compensation mechanism between -5 +5. Based on choosing-5  -4  -3  -2  -1  0  +1  +2  +3  +4  +4 as the expectation value of the imaginary drift angle  we get ten groups of the fact data in adjusting drift angle measured. The test results show that the precision of the drift angle control system can be achieved in 1. It can meet the system requirements that the precision of the control system is less than 3'  and it can achieve the high-precision image motion compensation. 2011 SPIE.   Study on the flutter model of the imaging quality of TDICCD space camera (EI CONFERENCE) 会议论文  OAI收割 2011 International Conference on Advanced Engineering Materials and Technology, AEMT 2011, July 29, 2011 - July 31, 2011, Sanya, China 作者:  Chen X.;  Chen X.;  Chen X. 收藏  |  浏览/下载：28/0  |  提交时间：2013/03/25 For any On-orbit Space camera  the influence of flutter on the imaging process of TDICCD space camera is inevitable  thus causing the decline of image quality. This paper briefly introduces the principle of TIDCCD camera and how flutter affects the imaging process. Then through the analysis and calculation of practical program  we find the acceleration criterion to avoid the blur of image quality. (2011) Trans Tech Publications.   Image forward motion compensation method for some aerial reconnaissance camera based on neural network predictive control (EI CONFERENCE) 会议论文  OAI收割 International Conference on Advanced Research on Computer Science and Information Engineering, CSIE 2011, May 21, 2011 - May 22, 2011, Zhengzhou, China Zhong C.; Ding Y.; Fu J. 收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25 In this paper  neural network predictive control method is used to compensate the image forward motion of a certain aerial reconnaissance camera and we have solved several problems that traditional control methods have. Firstly  according to the principle of imaging  we analyzed the reasons for the existence of image forward motion and established the mathematical model. Secondly  we analyzed the theoretically feasibility of the method. At last  simulation  experiments and test are used to validate the practical feasibility. Through what we have done  we conclude that neural network predictive control method can be used to compensate image forward motion for this certain camera and can make a perfect performance. 2011 Springer-Verlag.   Design and analysis of auto-focus assembly for spaceborne remote sensing camera (EI CONFERENCE) 会议论文  OAI收割 2011 International Conference on Electronics, Communications and Control, ICECC 2011, September 9, 2011 - September 11, 2011, Ningbo, China 作者:  Chen W.;  Gao X. 收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25 Spaceborne remote sensing camera may be out of focus when the environment and photographic distance changes. In order to get higher ground sampled distance for the camera  based on the experience gained from the development of a remote sensing camera  working principle of auto-focus assembly control system was discussed. Time of waveform extraction was reduced. It sets force an auto-focus assembly that uses cam and line guide rail in order to move the lens group. The motion error of the auto-focus assembly was difficult to be eliminated and would affect on the focusing accuracy of the spaceborne remote sensing camera directly. So it was analyzed at both ends of the focusing structure. The CCD detector can keep stable when the remote sensing camera is imaging. The motion error was tested to verify the validity of the simulation result and it is less than 0.01mm. Its accuracy meets using demand. The focusing method of moving focal plane is suitable for spaceborne remote sensing camera. 2011 IEEE.   Image motion compensation for a certain aviation camera based on Lucy-Richardson algorithm (EI CONFERENCE) 会议论文  OAI收割 2011 International Conference on Electronics and Optoelectronics, ICEOE 2011, July 29, 2011 - July 31, 2011, Dalian, China Zhong C.; Fu J.; Ding Y. 收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25 According to the actual situation  when high quality and high precision are required for the image  both beforehand and afterwards compensation should be used. In this paper  we use Lucy-Richardson algorithm to compensate image motion of a certain aviation camera as an afterwards compensation. Firstly  we analyze the imaging principle of the camera and the reasons that cause image motion. Then we have a brief introduce of the Lucy-Richardson algorithm. At last  in order to show the feasibility of the method  we do some simulation. Through theoretical and practical analysis  experiments and test  we conclude the Lucy-Richardson algorithm can be used to compensate image motion for the certain camera. 2011 IEEE.