中国科学院机构知识库网格系统: 检索

Localizability With Range-Difference Measurements: Numerical Computation and Error Bound Analysis 期刊论文 OAI收割
IEEE-ACM TRANSACTIONS ON NETWORKING, 2022, 页码: 14
作者: Zeng, Guangyang; Mu, Biqiang; Wei, Jieqiang; Wong, Wing Shing; Wu, Junfeng

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收藏 | 浏览/下载：46/0 | 提交时间：2022/06/21

Location awareness Noise measurement Error analysis Pollution measurement Measurement uncertainty Coordinate measuring machines Closed-form solutions Localization time difference of arrival (TDOA) nonconvex optimization numerical computation Lagrange multiplier

Atmospheric CO2 column concentration retrieval based on high resolution laser heterodyne spectra and evaluation method of system measuring error 期刊论文 OAI收割
ACTA PHYSICA SINICA, 2020, 卷号: 69
作者: Sun Chun-Yan; Wang Gui-Shi; Zhu Gong-Dong; Tan Tu; Liu Kun

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收藏 | 浏览/下载：27/0 | 提交时间：2020/10/26

laser heterodyne measuring error the reference forward model CO2 column concentration

Applications of differential barometric altimeter in ground cellular communication positioning network 期刊论文 OAI收割
IET SCIENCE MEASUREMENT & TECHNOLOGY, 2020, 卷号: 14, 期号: 3, 页码: 322-331
作者: Hu, Zhengqun; Zhang, Lirong; Ji, Yuanfa

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收藏 | 浏览/下载：25/0 | 提交时间：2021/12/06

cellular radio height measurement measurement errors Global Positioning System altimeters barometers least squares approximations Kalman filters surface fitting spread spectrum communication compensation matrix algebra GPS signal message structure power spectrum spread spectrum ranging signal fitting parameters least-square solution calibration compensation system noise variance matrix measurement noise variance matrix multibase station correction height information correction calculation DBA system systematic performance differential barometric altimeter ground cellular communication positioning network measurement datum distribution altitude positioning error Global Positioning System differential barometric altimetry system systematic implementation level continuous altitude measurement precise altitude measurement DBA systematic implementation aspect two dimensional curved surface fitting function sensor measurement correction filtering effect Kalman filter measuring station multiBSs navigation fusion

Error Analysis and Experiments of Attitude Measurement using Laser Gyroscope 会议论文 OAI收割
Shanghai, PEOPLES R CHINAShanghai, PEOPLES R CHINA, NOV 24-26, 2017NOV 24-26, 2017
作者: Ren, Xin-Ran; Ma, Wen-Li; Jiang, Ping; Huang, Jin-Long; Pan, Nian

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收藏 | 浏览/下载：27/0 | 提交时间：2019/08/23

laser gyro attitude measurement error analysis photoelectric tracking and measuring equipment

Flatness measurement of large flat with two-station laser trackers 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF OPTOMECHATRONICS, 2018, 卷号: 12, 期号: 1, 页码: 53-62
作者: Li, Jie; Yang, Jie; Wu, Shibin; Cao, Xuedong

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收藏 | 浏览/下载：34/0 | 提交时间：2019/08/23

Flatness measurement large-scale metrology error compensation coordinate measuring machine laser tracker

Bi-camera ranger-finder and error analyze based on binocular parallax (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Vibration, Structural Engineering and Measurement, ICVSEM2011, October 21, 2011 - October 23, 2011, Shanghai, China
Wang Z. C.; Dai M.; Huang J.; Wang Y. Y.; Chen X. L.; Gao Y. J.

收藏 | 浏览/下载：28/0 | 提交时间：2013/03/25

The traditional facilities that used to find range are mostly based on laser or ultrasonic. Now based on binocular parallax of human eyes we advance a method used to get the distance by measuring the offset on image panel. On this foundation we also analyze the error in forward. The academic analysis indicate that the measurement would be impacted severely by transverse offset and angle-measuring offset in contrast much slightly by lengthways offset. When we put this facility into practice this facility can suffice practical demand completely if we select the space between bi-camera and the focus of facility rationally. (2012) Trans Tech Publications Switzerland.

Error analysis of correlating Shack-Hartmann wave-front sensor for a point source 期刊论文 OAI收割
ACTA PHYSICA SINICA, 2011, 卷号: 60, 期号: 9
作者: Chen Lin-Hui; Rao Chang-Hui

收藏 | 浏览/下载：23/0 | 提交时间：2015/09/21

correlating Shack-Hartmann wavefront sensor correlation algorithm centroiding algorithm measuring error

Data processing method of multi-position strap-down north seeking system based on SVD (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Mechatronic Science, Electric Engineering and Computer, MEC 2011, August 19, 2011 - August 22, 2011, Jilin, China
Shen C.-W.; Liu C.; Yu S.-B.; Wang Z.-Q.; Li J.-R.

收藏 | 浏览/下载：36/0 | 提交时间：2013/03/25

With the aim to fit the sin wave curve of a multi-position strap-down north seeking system and to calculate the real north angle accurately the principles of the system and the algorithm of singular value decomposition(SVD) are introduced. The factors influencing the measuring precision are also analyzed. Then the algorithm is adopted to fit curves. Experimental results indicate that the singular value decomposition is very precise for its error sum is 1.1102V and the squared error is 2.8mV. Moreover for phase angle measurement measured six times in same direction the squared error is 24 (1). The method based on SVD can satisfy the system precision requirements of curve-fitting north seeking systems. 2011 IEEE.

The Research of real time auto-recognition of the moire fringe (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
Wang M.-J.; Wu Z.-G.

收藏 | 浏览/下载：19/0 | 提交时间：2013/03/25

Measuring the movement of raster by the method of moire fringe has the advantage of high sensitivity high resolution and non-contacted measurement. The characteristic of moire fringe is that the image is white alternate with black the angle of the stripes is uniform the width of the stripes is uniform the terminators of the stripes aren't clear. A fast method that can figure out the width and angle of the moire fringe precisely is put forward in this paper. It calculates the angle the stripes firstly. According to the principle of the minimum mean squared error (MMSE) the closer a series of data is the smaller the value of the MMSE will be. The method is described as follows: It takes the image's center as the origin 180 beelines pass through the origin with the same angle interval. it calculates the value of the minimum mean squared error of the 180 beelines and find out the least one among those then the angle of the moire fringe comes out primarily. In order to improving the calculating precision of moire fringe 60 equal angles are divided in the neighborhood of the angle then a precise angle of moire fringe is calculated according to the principle of the MMSE. After getting out the angle of the moire fringe we begin to calculate the width of moire fringe. A line vertical with the moire fringe is drawn and we can get the width of the moire fringe by the vertical line. In order to get over the influence of the noise an effective area with the shape of diamond is selected in the image. The data of area is accumulated and projected according to the direction of moire fringe and a sine curve come out. The width of moire fringe can be obtained by getting the position of the first wave crest the position of the last wave crest and the number of wave crest. Experiments prove that the precision of the method put forward in this paper is enhanced in comparison with the traditional frequency method the precision of width calculation achieves to 99.6% according to the evaluation indicators of width detection error. The computing speed is boosted largely compared with traditional method and it can achieve with 15 ms that satisfying the demand of real time. 2011 SPIE.

Autocollimation form dual-frequency laser diffraction grating interferometer design and analysis (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
Wang C.-G.

收藏 | 浏览/下载：34/0 | 提交时间：2013/03/25

Propose a new measurement system of autocollimation form laser grating heterodyne interferometer. Take grating diffraction and polarization optics as theoretical foundation second furthermore combined with electronics knowledge to analyze the system. First make use of autocollimation diffraction of grating measurement information obtained by dual-frequency laser belongs to ac signal the interferometer measurement system take grating pitch as measuring datum the structure is simple possess great gain and high signal-noise ratio therefore stable completely overcome the disadvantages of DC level drift caused by light intensity variation of single-frequency laser system can achieve nanometer resolution. 2010 IEEE. reduce the impact of environmental factors easy to install and debug measurement error is small