中国科学院机构知识库网格系统: 检索

Trust-Region Nonlinear Optimization Algorithm for Orientation Estimator and Visual Measurement of Inertial-Magnetic Sensor 期刊论文 OAI收割
DRONES, 2023, 卷号: 7, 期号: 6, 页码: 25
作者: Jia, Nan; Wei, Zongkang; Li, Bangyu

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收藏 | 浏览/下载：16/0 | 提交时间：2023/11/17

onboard sensor fusion nonlinear optimization visual measurement drone orientation estimator

Orientation Measurement for Objects with Planar Surface Based on Monocular Microscopic Vision 期刊论文 OAI收割
International Journal of Automation and Computing, 2020, 卷号: 17, 期号: 2, 页码: 247-256
作者: Ying Li; Xi-Long Liu; De Xu; Da-Peng Zhang

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收藏 | 浏览/下载：18/0 | 提交时间：2021/02/22

Microscopic vision micro assembly orientation measurement optimization analytical computation.

High precision assembly and efficient dispensing approaches for millimeter objects 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF ADVANCED ROBOTIC SYSTEMS, 2019, 卷号: 16, 期号: 3, 页码: 11
作者: Li, Ying; Zhang, Dapeng; Xu, De

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收藏 | 浏览/下载：51/0 | 提交时间：2019/09/29

Orientation measurement laser range sensor fluid glue dispensing microscopic vision precision assembly

Robust orientation estimate via inertial guided visual sample consensus 期刊论文 OAI收割
Personal and Ubiquitous Computing, 2018, 卷号: 22, 期号: 2, 页码: 259–274
作者: Zhang YL(张吟龙); Li Y(李杨); Liang W(梁炜); Tan JD(谈金东); An HB(安海博)

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收藏 | 浏览/下载：30/0 | 提交时间：2017/08/20

Orientation estimate Wearable sensors Inertial measurement unit Monocular camera Sample and consensus

POSITION AND ORIENTATION MEASUREMENT FOR AUTONOMOUS AERIAL REFUELING BASED ON MONOCULAR VISION 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF ROBOTICS & AUTOMATION, 2017, 卷号: 32, 期号: 1, 页码: 13-21
作者: Wu, Wenqi; Wang, Xingang; Xu, De; Yin, Yingjie

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收藏 | 浏览/下载：29/0 | 提交时间：2017/05/05

Ellipse Fitting Position And Orientation Measurement Monocular Vision Aerial Refuelling

Orientation estimation using visual and inertial sensors 会议论文 OAI收割
2015 IEEE International Conference on Information and Automation, Lijiang, China, Augest 8-10, 2015
作者: Zhang YL(张吟龙); Liang W(梁炜); Li Y(李杨)

收藏 | 浏览/下载：28/0 | 提交时间：2015/12/19

Orientation Estimate Inertial Measurement Unit Monocular Camera Nearest Neighbor locality constraint

The method of the system error modification of photoelectric theodolite of T type (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China
作者: Zhao L.; Zhang Y.

收藏 | 浏览/下载：19/0 | 提交时间：2013/03/25

The system error of photoelectric theodolite includes Visual axis error This paper ratiocinates the formula of Azimuth orientation error horizontal axis error elevation zero error and Visual axis error of Photoelectric theodolite of T type by triangle relation in space. Photoelectric theodolite of U type with main visual axis and auxiliary visual axis shoots images and inverse images of marks to obtain system error data. Error is less than 0.4 second by comparing error data of auxiliary visual axis with error data of main visual axis and the precision of two methods is identical. It has been validated that the method of error measurement of photoelectric theodolite of T type is right. 2012 IEEE. vertical axis error Azimuth orientation error elevation zero error

High accuracy star image locating and imaging calibration for star sensor technology (EI CONFERENCE) 会议论文 OAI收割
6th International Symposium on Precision Engineering Measurements and Instrumentation, August 8, 2010 - August 11, 2010, Hangzhou, China
作者: Wang Y.; Wang Y.; Wang Y.; Wang Y.; Wang Y.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

Today aircraft attitude measurement technology plays an important role in an aircraft system because it can provide orientation for aircraft in action. Lately star sensor technology used in aircraft attitude measurement has become more and more popular because of its high accuracy light weight without attitude accumulation errors and other advantages. There are three main steps for star sensor to measure aircraft attitude star image locating star identification and attitude tracking. The latter two steps are based on the accuracy of star image locating. So it's critical to make efforts to advance the accuracy of star image locating. Some imaging errors such as spherical aberration or coma aberration also have negative effect on the accuracy of star image locating of which the effect is necessarily reduced as well. At the beginning of this article the structure of star sensor hardware is introduced. Secondly three methods for star image locating are described specifically which are traditional centroid method Gauss quadric fitting method and improved Gauss quadric fitting method. Subsequently an imaging calibration method is described for the purpose of reducing the effect of imaging errors. Finally the experiment shows that the accuracy of the star sensor is 2-arc-second. 2010 SPIE.

Orientation error analysis of alt-alt photoelectric telescope (EI CONFERENCE) 会议论文 OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, November 19, 2008 - November 21, 2008, Chengdu, China
作者: Wu X.-X.

收藏 | 浏览/下载：33/0 | 提交时间：2013/03/25

In order to ascertain the effects of main errors of alt-alt photoelectric telescope on measurement accuracy orientation error is analyzed.For analyzing optical mechanical and electrical errors from measured target to telescope picture we construct 7 coordinates such as:the earth's core coordinate alt-alt coordinate etc. carry through 21 times coordinate transformation form measuring equation with 26 variables. and we utilize Monte Carlo method to calculate the orientation error analyze the effects of errors upon pointing. The result indicates that the measuring error standard deviation of alt-alt telescope is minimum value about 10? at the zenith zone. and the deviation increases with the rotation angles of longitude and latitude axes. The model and the method not only can analyze and synthesize the main errors but also provide a reference to the whole design. 2009 SPIE.

Study of high precision non-contact measurement based on CCD (EI CONFERENCE) 会议论文 OAI收割
4th International Conference on Information Technology and Applications, ICITA 2007, January 15, 2007 - January 18, 2007, Harbin, China
Lin L.; Yun F.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

In this paper a method that measures relatively positionrelationshipquickly and accurately between two vehicles both on a horizontal plane is introduced. When the linear CCD camera placed on the end of manipulator scans two point targets located on the other vehicle by virtue of the spatial intersection principle and trigonometry theorem the relative position relationship between the loading vehicles and launching ones can be gotten(i.e. the spatial coordinate parameters of x y z and the angle displacement ). At the same time the paper establishes that the measurement error of length is less than 1mm by analysis of thee rror analysis and the simulation of computer. The angle displacement is less than 3 which satisfies the technical requests. So the vehicle orientation and loading missiles can be both done at the shortest time. It meets the demand of centralization between the measurement and execution. Forboth automatic transshipment and spatial position relationship measurement the study is valuable. And the manipulator is measure device as well as executive one so that residual inherent error decreases according to identical reference principle. Therefore the measure precision can be improved greatly.