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长春光学精密机械与物... [7]
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会议论文 [7]
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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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The research on adaptive measurement of angular acceleration for photoelectric servo turntable (EI CONFERENCE)
会议论文
2011 International Conference on Mechatronic Science, Electric Engineering and Computer, MEC 2011, August 19, 2011 - August 22, 2011, Jilin, China
Liang W.
;
Guo J.
;
Chen J.
;
Feng F.
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浏览/下载:18/0
  |  
提交时间:2013/03/25
The paper proposes a new measurement method of angular acceleration for photoelectric servo turntable. Piezoelectric angular acceleration sensor is used to measure angular acceleration directly
Adaptive FIR filter based on LMS algorithm is established on DSP
by which angular acceleration signal can be filtered and corrected errors adaptively
then angular acceleration signals can be measured adaptively. This method avoids measurement errors and calculation noise by computing angular acceleration indirectly
thus improving measurement precision and making measurement results better than traditional methods. The gotten angular acceleration can be sent to servo control mechanism as feed forward control signals to improve control effects of servo turntable significantly. 2011 IEEE.
Simulation and experiment of the static FTIR based on micro multi-step mirrors (EI CONFERENCE)
会议论文
International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies, May 24, 2011 - May 26, 2011, Beijing, China
Liang J.
;
Liang Z.-Z.
;
Lv J.-G.
;
Fu J.-G.
;
Zheng Y.
;
Feng C.
;
Wang W.-B.
;
Zhu W.-B.
;
Yao J.-S.
;
Zhang J.
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  |  
浏览/下载:27/0
  |  
提交时间:2013/03/25
In recent years
Fourier transform spectrometer (FTS) with small size and low mass is required in many applications with growing need for real-time and small platform spectral detection. In this paper
a micro Fourier transform infrared spectrometer (FTIR) based on spatial modulation mode was designed. This spectrometer has the advantages of high stability and simplified configuration. It also promises optical path differences (OPD) with high precision
as MOEMS technology is used in manufacturing the key components. The simulation and the experiments with regard to this FTIR configuration have been done. Firstly
the diffraction effect of the micro multi-step mirrors (MMSMs) is studied. We discuss the influence to the reversed spectrum by different mirror widths and different diffraction distances. Secondly
we simulate and analyze the influence of the source solid angle to the spectral resolution. Thirdly
we set up the theoretical model of the collimation error which is mainly from the defocus of the optical system and analyze the result caused by the collimation error. Fourthly
a new discrete Fourier transform arithmetic using least-squares cosines progression (LSCP) is proposed which can reconstruct the spectrum with nonuniform sampled signals. Finally
the MMSMs are fabricated used the MOEMS technology and the structural parameters are tested. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).
A real-time two-dimensional correlation speed measurement based on image (EI CONFERENCE)
会议论文
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Zhang Y.-X.
;
Xu Z.-P.
;
Yu L.
;
Ge W.-Q.
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浏览/下载:17/0
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提交时间:2013/03/25
In order to implement two-dimensional moving object's non-contact and real-time speed measurement
in this paper
wc proposed a new method which was based on the characteristic of FPGA and a real-time two-dimensional correlation speed measurement was proposed on image processing using high speed CMOS shown in figure 1. Experimental installation was shown in figure 2
a cardboard with images which was fixed in electric control movement device was moving to simulate moving object
the CMOS image sensor gathered image signals of the cardboard and the image signals was output to FPGA after a serials pretreatment such as binaryzation etc. Logical operation insteaded mathematical operation on FPGA to implement two frames image's cross-correlation operations as the formula (10) in this paper
and finally calculate the two-dimensional velocity. Through experiment result of table 1 we drawn an conclusion the accurarcy of the method in this paper was less than 1 pixel and the method can be used at a certain speed ranges of two-dimensional
real-time speed measurement. 2010 IEEE.
Real-time quality control on a smart camera (EI CONFERENCE)
会议论文
ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China
Xiao C.
;
Zhou H.
;
Li G.
;
Hao Z.
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浏览/下载:20/0
  |  
提交时间:2013/03/25
A smart camera is composed of a video sensing
high-level video processing
communication and other affiliations within a single device. Such cameras are very important devices in quality control systems. This paper presents a prototyping development of a smart camera for quality control. The smart camera is divided to four parts: a CMOS sensor
a digital signal processor (DSP)
a CPLD and a display device. In order to improving the processing speed
low-level and high-level video processing algorithms are discussed to the embedded DSP-based platforms. The algorithms can quickly and automatic detect productions' quality defaults. All algorithms are tested under a Matlab-based prototyping implementation and migrated to the smart camera. The smart camera prototype automatic processes the video data and streams the results of the video data to the display devices and control devices. Control signals are send to produce-line to adjust the producing state within the required real-time constrains.
Design and DSP implementation of star image acquisition and Star point fast acquiring tracking (EI CONFERENCE)
会议论文
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 2, 2005 - November 5, 2005, Zian, China
Zhou G.
;
Wang X.
;
Hao Z.
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浏览/下载:17/0
  |  
提交时间:2013/03/25
Star sensor is a special high accuracy photoelectric sensor. Attitude acquisition time is an important function index of star sensor. In this paper
the design target is to acquire 10 samples per second dynamic performance. On the basis of analyzing CCD signals timing and star image processing
a new design and a special parallel architecture for improving star image processing are presented in this paper. In the design
the operation moving the data in expanded windows including the star to the on-chip memory of DSP is arranged in the invalid period of CCD frame signal. During the CCD saving the star image to memory
DSP processes the data in the on-chip memory. This parallelism greatly improves the efficiency of processing. The scheme proposed here results in enormous savings of memory normally required. In the scheme
DSP HOLD mode and CPLD technology are used to make a shared memory between CCD and DSP. The efficiency of processing is discussed in numerical tests. Only in 3.5ms is acquired the five lightest stars in the star acquisition stage. In 43us
the data in five expanded windows including stars are moved into the internal memory of DSP
and in 1.6ms
five star coordinates are achieved in the star tracking stage.
Error analysis and test study of fiber optic gyroscope north-finder (EI CONFERENCE)
会议论文
Advanced Sensor Systems and Applications II, November 8, 2004 - November 12, 2004, Beijing, China
Zhang Z.
;
Sun J.
;
Wu K.
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浏览/下载:20/0
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提交时间:2013/03/25
North-finder system is an important application of the inertial technology. It provides true north azimuth information to f all kinds of ground-based equipment. This paper designed a dynamic automatic north-finder based on the modulation output of fiber optic gyroscope (FOG). In this scheme
the sine output signal of the FOG was sampled and disposed
and then the real north of surveyed point on the surface of earth was calculated. The deviation caused by the base tilt was compensated by an accelerator. The output signals of FOG and accelerator were computed combined with the position sampled from increasing encoder by digital signal processor. Successive rotating technique was adopted to modulate the FOG signal periodically. Most of the low frequency part of random gyro drift errors was compensated. The north-finder accuracy was improved compared with the traditional static measuring method. The test result shows the FOG automatic north-finder obtains 2' true north angle accuracies within not more than three minutes
can meet the orientation need of artillery
terrain measurement vehicle
armored car
unmanned drive vehicle
geodetic survey and tunnel exploration.
The signal extraction of fetal heart rate based on wavelet transform and BP neural network (EI CONFERENCE)
会议论文
Third International Conference on Experimental Mechanics and Third Conference of the Asian Committee on Experimental Mechanics, November 29, 2004 - December 1, 2004, Singapore, Singapore
Hong Y. X.
;
Cheng Z. B.
;
Dai F. H.
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浏览/下载:15/0
  |  
提交时间:2013/03/25
This paper briefly introduces the collection and recognition of bio-medical signals
the other threading is analyzing data. Using the method
designs the method to collect FM signals. A detailed discussion on the system hardware
it is broaden to analyze the signal in real-time. Wavelet transform to remove the main interference in the FM and by adding time-window to recognize with BP network
structure and functions is also given. Under LabWindows/CVI
Finally the results of collecting signals and BP networks are discussed.8 pregnant women's signals of FM were collected successfully by using the sensor. The correctness rate of BP network recognition is about 83.3% by using the above measure.
the hardware and the driver do compatible
the hardware equipment work properly actively. The paper adopts multi threading technology for real-time analysis and makes use of latency time of CPU effectively
expedites program reflect speed
improves the program to perform efficiency. One threading is collecting data
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