中国科学院机构知识库网格
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A design on a control method of a new type of focal plane shutter (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
Xue L.; Ming L.; Zheng L.-N.; Zhou J.-F.; Zhang H.-W.; Zhang J.-C.
收藏  |  浏览/下载:33/0  |  提交时间:2013/03/25
In order to ensure appropriate exposure time  and no exposure while electric charge is transferring after taking a photograph  it is necessary to have the shutter mechanism cooperate with CCD for area CCD aerial cameras. The ground object illumination has a wide range which is from 4000Lx to 100000Lx  so a shutter which is high efficient and a continuous stepless adjustment are also required. This paper introduces the fundamental principle  structural design and control procedure about this new focal plane shutter. Under the control of DSP  the velocity of shutter curtain governed by the shutter motor can be not only precisely controlled  but also the durability and the reliability are increased. The experiment results have shown that this new shutter has the higher stability of movement  long life span with more than 105 operating times  a wide range of exposure time from1/ 50s to 1/ 320s(depending on the slit width)and the exposure error is less than 10%. With the CCD gain adjustment  the performance of this shutter is fully satisfied with the requirements of area CCD aerial cameras. 2010 IEEE.  
Quantifying rupture force and bond lifetime of P-selectin-PSGL-1 interactions at lower forces 会议论文  OAI收割
Advances in Heterogeneous Material Mechanics 2008 - 2nd International Conference on Heterogeneous Material Mechanics, ICHMM 2008, Huangshan, China, June 3, 2008 - June 8, 2008
作者:  
Zhang Y(章燕);  Sun GY(孙淦云);  Huo B(霍波);  Long M(龙勉)
收藏  |  浏览/下载:39/0  |  提交时间:2017/06/01
Broadband near-infrared emission in Er3+-Tm3+ codoped chalcohalide glasses 期刊论文  OAI收割
opt. lett., 2008, 卷号: 33, 期号: 20, 页码: 2293, 2295
Xu Yinsheng; 陈丹平; Wang Wel; Zhang Qiang; 曾惠丹; Shen Ce; Chen Guorong
收藏  |  浏览/下载:1336/213  |  提交时间:2009/09/24