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长春光学精密机械与物... [6]
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会议论文 [6]
发表日期
2009 [6]
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发表日期:2009
内容类型:会议论文
专题:长春光学精密机械与物理研究所
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Graph fitting test method for the interpolation error of Moire fringe (EI CONFERENCE)
会议论文
9th International Conference on Electronic Measurement and Instruments, ICEMI 2009, August 16, 2009 - August 19, 2009, Beijing, China
Wan Q.
;
Sun Y.
;
She R.
;
Liang L.
;
Lu X.
;
Du Y.
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浏览/下载:23/0
  |  
提交时间:2013/03/25
In order to realize the fast test for the interpolation error
the graph fitting test method for the interpolation error of Moire fringe is put forward in this paper. Firstly
the triangular wave Moire fringe photoelectric signal of the encoder whose phase difference is 90 are sampled to get the Lissajous graph of the two signals. Secondly
the single wave represented by the founded subsection function is used to fit the practical Moire fringe Lissajous graph. Then
the fitting result is tested to verify whether it satisfies the accuracy requirement. Lastly
the founded subsection function instead of the practical wave function is used to calculate the interpolation error. Using the graph fitting method to sample the Moire fringe single of 15-bits photoelectric encoder to get the interpolation error curve
the tested maximum interpolation error is 70" and the minimum error is - 69". Comparing with the interpolation error which is received from traditional test method
the change trend of the interpolation error curve is similar
and peak-peak value is almost equality. The results of experiment indicate that: the equipment is convenient and the examination method is efficient and feasible. The measure speed is fast and the manifestation result is intuitionistic. The system can be used in the working field. The method can avoid the speed influence and realize the dynamic interpolation error measure
which is significant for the research of encoder's dynamic accuracy characteristics. 2009 IEEE.
Real-time matching algorithm of navigation image based on corner detection (EI CONFERENCE)
会议论文
International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications, June 17, 2009 - June 19, 2009, Beijing, China
Zhang T.
;
Yang L.-M.
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浏览/下载:41/0
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提交时间:2013/03/25
In order to meet requirement of real-time and high accuracy in image matching aided navigation
SSDA algorithm is used to match remote sensing image and template image coarsely
a fast and effective algorithm of remote sensing image matching based on corner detection is put forward. With the combination of rough and fine match
when the matching result is bigger than one to count absolute value sum of energy difference of characteristic point energy to realize fine match of remote sensing image and template image to locate the position of template image in remote sensing image accurately. Simulation experiment proves that the matching of a remote sensing image resolution of 1018*1530 and a template image resolution of 150*90 can be fulfilled within 2.392 second
wavelet transform is used to acquire low frequency component to realize image compression to decrease calculation work and increase matching speed. Harris corner detection algorithm is used to detect corner of remote sensing image and template image and energy of every corner is calculated
the algorithm is robust and effective
real time image navigation can be achieved. 2009 SPIE.
Modeling and analysis of dialyte-lens auto-focusing technology for theodolite (EI CONFERENCE)
会议论文
2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications, November 16, 2008 - November 19, 2008, Beijing, China
Wu L.-T.
;
Qiao Y.-F.
;
Wu D.-K.
;
Cai S.
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浏览/下载:14/0
  |  
提交时间:2013/03/25
In order to realize real-time auto-focusing for theodolite
lens-apart method was designed with the corresponding math model built and analyzed. An Object beam splitted after the first image surface of the theodolite traveled through two dialyte lens and then was imaged on CCD. The distance between two spots when exactly focused was set as the calibration value
and the relationship between defocus distance and spot offset was given. The influence of tracking center shift and divergence angle etc. on focusing accuracy was analyzed. Compared with the traditional focusing method
this scheme has a higher accuracy
faster calculation
higher tolerance for environment temperature and a simpler construction. The experiment result exhibited a resolution higher than 0.056mm
which shows a bright engineering application prospect for this method. 2009 SPIE.
Orientation error analysis of alt-alt photoelectric telescope (EI CONFERENCE)
会议论文
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, November 19, 2008 - November 21, 2008, Chengdu, China
Han X.-B.
;
Zhang J.-X.
;
Zhao J.-Y.
;
Zhao Y.-Z.
;
Wu X.-X.
;
Wang Z.-C.
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浏览/下载:26/0
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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.
The automatic photoresist coating machine on the spherical surface (EI CONFERENCE)
会议论文
2009 IEEE International Conference on Mechatronics and Automation, ICMA 2009, August 9, 2009 - August 12, 2009, Changchun, China
Li X.
;
Wang H.
;
Xu J.
;
Li Y.
;
Feng X.
收藏
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浏览/下载:13/0
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提交时间:2013/03/25
The photoresist coating is an important micro machining process widely applied in engineering. The formed film should be uniform and enough thin to assure the quality of final pattern whose line width is micrometer or nanometer. It is more difficult to process it on the spherical surface than on the flat. In this work
mathematic model of film thickness on the spherical surface is proposed by using hydromechanics. The key factors that influence the film thickness are obtained from the analysis of coating process. Then
the rational parameters which be controlled by the automatic photoresist coating machine can be final set up according to the result of the coating experiments. And the accuracy analysis of the key part which is used for the main process is performed by the error analytics. This machine not only makes the whole coating process automation
but also monitors the film quality in real time. It is adequate for aspheric surface also. 2009 IEEE.
Space optics remote sensor focusing components mechanics characteristic analysis based on FEM (EI CONFERENCE)
会议论文
International Symposium on Photoelectronic Detection and Imaging 2009: Material and Device Technology for Sensors, June 17, 2009 - June 19, 2009, Beijing, China
Wang Y.-X.
;
Wang B.
;
Ren J.-Y.
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  |  
浏览/下载:77/0
  |  
提交时间:2013/03/25
Space optical remote sensor is very important in many fields of science and military significance. It is widely applied. Space optical remote sensor design and manufacturing require precision and stability. Focusing mechanics is an important component of remote sensors. Focusing mechanics can guarantee the stability of the entire mechanics focusing accuracy
therefore the stability of research focusing mechanics is very important. In order to guarantee the space optics remote sensor focusing mechanics the stability
takes steps the space optics remote sensor focusing organization mechanics characteristic analysis from the classics contact theory. This article uses international general non-linear finite element analysis software ABAQUS to carry on mechanics characteristic analysis to the space optics remote sensor focusing mechanics. First acts according to the focusing mechanics unique feature
carries on the finite element to the structural model the grid division
the material attribute disposition and the boundary condition indeed grades. Then establishment contact non-linear finite element model
and to focusing organization finite element model infliction unit action. Like this contacts the result and the equivalent static analysis result which the nonlinear analysis obtains carries on the contrast and the analysis. This article last count result modality is 90HZ
satisfies the space optics remote sensor structure overall modality to request to be bigger than 50HZ.This article when carries on the dynamic analysis
extracts the structure kinetic energy and the acceleration curve. In the dynamic analysis obtained transient response analysis modality 70.5Hz
this also is bigger than 50HZ. The dynamic analysis indicated the structure dynamic stability has the distinct enhancement
has provided certain foundation for the space optics remote sensor following development work
reduced the overall system development cycle. 2009 SPIE.
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