中国科学院机构知识库网格系统: 检索

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	High-Precision Automatic Calibration Modeling of Point Light Source Tracking Systems 期刊论文 OAI收割 SENSORS, 2021, 卷号: 21 作者: Li, Ruijin; Zhang, Liming; Wang, Xianhua; Xu, Weiwei; Li, Xin \| 收藏 \| 浏览/下载：36/0 \| 提交时间：2021/05/17 radiometric calibration modeling geometric error high-precision calibration
	A Novel Camera Calibration Method Based on Multilevel-Edge-Fitting Ellipse-Shaped Analytical Model 期刊论文 OAI收割 IEEE Sensors Journal, 2020, 卷号: 20, 期号: 11, 页码: 5818-5826 作者: Su S(苏顺); Luo Y(罗阳); Yang KK(杨克克); Gao ZY(高振远); Zhao YW(赵忆文) \| 收藏 \| 浏览/下载：10/0 \| 提交时间：2020/05/30 Camera calibration spherical calibration plate distortion bias high precision calibration
	Design and investigation of absolute radiance calibration primary radiometer 期刊论文 OAI收割 IET SCIENCE MEASUREMENT & TECHNOLOGY, 2018, 卷号: 12, 期号: 8, 页码: 994-1000 作者: Wang Yupeng; Xia Zhiwei; Luo Yang; Wang Kai; Fang Wei \| 收藏 \| 浏览/下载：76/0 \| 提交时间：2019/08/26 radiometry temperature control geophysical equipment cryogenics calibration radiometers power measurement calibration precision space remote sensor absolute radiance calibration primary radiometer ARCPR irradiance calibration standard mechanical cryogenic absolute radiometer cryogenic environment Stryn-type pulse tube cryocooler high-precision temperature controllers detector characteristics measurement radiometric calibration standard
	Evaluation of different calibration equations for NTC thermistor applied to high-precision temperature measurement 期刊论文 OAI收割 Measurement, 2018, 卷号: 120, 页码: 21-27 作者: Liu, G.; Guo, L.; Liu, C. L.; Wu, Q. W. \| 收藏 \| 浏览/下载：15/0 \| 提交时间：2019/09/17 Calibration equation NTC thermistor High precision Uncertainty Engineering Instruments & Instrumentation
	Theoretical analysis on optical parallelism of pentaprism 期刊论文 OAI收割 ACTA PHOTONICA SINICA, 2015, 卷号: 44, 期号: 5, 页码: 523006 作者: Wang QS(王秋实); Li M(李明); Liao KL(廖可梁); Yang FG(杨福桂); Sheng WF(盛伟繁) 收藏 \| 浏览/下载：65/0 \| 提交时间：2016/04/18 Analytical expressions Coordinates transformation High-precision optical surfaces Laser interferometer Matrix optics Pentaprism System calibration Tolerance analysis
	A novel miniature absolute metal rotary encoder based on Single-track Periodic Gray Code (EI CONFERENCE) 会议论文 OAI收割 2012 2nd International Conference on Instrumentation and Measurement, Computer, Communication and Control, IMCCC 2012, December 8, 2012 - December 10, 2012, Harbin, Heilongjiang, China 作者: Sun Y.; Yang S.-W.; Sun Y.; Wan Q.-H. 收藏 \| 浏览/下载：27/0 \| 提交时间：2013/03/25 In order to improve the resolution and enhance the impact resistance and vibration resistance of encoders a novel absolute metal rotary encoder based on Single-track Periodic Gray Code is presented. The configuration and working principle of the encoder is introduced and then the metal code disc which can realize full scale absolute encoding on one single track and its corresponding metal slit disc are proposed. Finally the data acquisition and processing system based on FPGA of encoder is presented. The resolution of the encoder can reach 5.27through electronic subdivision and calibration between the precision code and the coarse code with its volume only 4840mm. The encoder has some advantages such as small volume low cost high resolution and strong impact resistance. 2012 IEEE.
	The study of encoding principle and encoding disc design of a new-style vernier absolute encoder (EI CONFERENCE) 会议论文 OAI收割 2nd Annual Conference on Electrical and Control Engineering, ICECE 2011, September 16, 2011 - September 18, 2011, Yichang, China 作者: Li L. 收藏 \| 浏览/下载：26/0 \| 提交时间：2013/03/25 To satisfy the requirement of encoder miniaturization high dependability and high measuring accuracy a new-style vernier absolute type encoder which offered significant advantages over less reticling circles and high precision was presented in the paper which carried out the design of vernier encoding disc the analysis of new-style vernier encoding principle and exact encoding track calibration by studying the photoelectric encoder. The Matlab simulation results prove that the encoding and coding methods are feasible. The test showed that the cubage of encoder was quite small and the diameter of the encoder can be controlled within 100mm its resolution can reach 24 bits i.e. 0.0772. The feasibility of encoding and coding method was further proved. 2011 IEEE.
	Design of high precision star image locating method used in star sensor technology (EI CONFERENCE) 会议论文 OAI收割 2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China 作者: Sun H.; Wang Y.; Wang Y.; Wang Y.; Wang Y. 收藏 \| 浏览/下载：54/0 \| 提交时间：2013/03/25 Nowadays star sensor technology used in aircraft attitude measurement has become more and more popular for its high precision light weight without attitude accumulation errors and other advantages. In order to enhance the accuracy of star sensor it is critical to make efforts to promote the precision of star image locating. High precision star image locating method mentioned in this article includes two aspects. One is sub-pixel dividing algorithm used to acquire the coordinate of stars. The other one is imaging calibration method used to weaken the effect caused by imaging distortion. This method is finally realized in some type of star sensor system. Then an experiment is designed to verify the precision of the method. The result of the experiment shows that the precision of the method is 2" in the experimental environment. 2010 IEEE.
	A new high-precision measurement system used in the image calibration of large-sized photographic instrument (EI CONFERENCE) 会议论文 OAI收割 Optical Design and Testing II, November 8, 2004 - November 11, 2004, Beijing, United states 作者: Li Y.; Liu Z.; Li Y.; Li Y.; Li Y. 收藏 \| 浏览/下载：15/0 \| 提交时间：2013/03/25 The purpose of characterizing the image of large-sized photographic instrument is to make the directionality of three coordinate axises in the three-dimensional coordinate of the image and the directionality of three axises of coordinate in the frame of axes of the instrument keep the same direction. This problem was solved by a high-precision measurement system composed of double-theodolite and a set of communication system. Two cube prisms will be respectively placed on the image surface and the instrument. Every cube prism will stand for a three-dimensional coordinate from the image surface or the instrument. As a result the interdependence of both coordinates from the image surface and the instrument can be obtained by measuring the interdependence of the both cube prisms with autocollimation survey axiom. In the survey system two high-precision stations TDA5005 from Leica Company will be selected as double-theodolite and the interdependence of both coordinates can be achieved by moving the station only at one time. Therefore this measurement system is a high efficient and high-precision surveying method to the image calibration of the large-sized photographic instrument. Based on the experiment its measuring accuracy can reach arc-second level.