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A Pressure-Based High-Quality Wrist Pulse Measurement System With an Application in Emotion Analysis 期刊论文  OAI收割
IEEE SENSORS JOURNAL, 2023, 卷号: 23, 期号: 18, 页码: 21821-21831
作者:  
Liu, Zeyu;  Cheng, Long;  Li, Zhengwei
  |  收藏  |  浏览/下载:24/0  |  提交时间:2023/12/21
Intentional Blocking Based Photoelectric Soft Pressure Sensor with High Sensitivity and Stability 期刊论文  OAI收割
SOFT ROBOTICS, 2022, 页码: 12
作者:  
Li, Zhengwei;  Cheng, Long;  Liu, Zeyu
  |  收藏  |  浏览/下载:36/0  |  提交时间:2022/07/25
An Ultra-Stretchable and Highly Sensitive Photoelectric Effect-Based Strain Sensor: Implementation and Applications 期刊论文  OAI收割
IEEE SENSORS JOURNAL, 2021, 卷号: 21, 期号: 4, 页码: 4365-4376
作者:  
Li, Zhengwei;  Cheng, Long;  Song, Qingkun
  |  收藏  |  浏览/下载:42/0  |  提交时间:2021/03/29
Ferroelectric, Photoelectric, and Photovoltaic Performance of Silver Niobate Ceramics 期刊论文  OAI收割
ADVANCED FUNCTIONAL MATERIALS, 2019, 卷号: 29, 期号: 28
作者:  
He, Xiang;  Chen, Chen;  Li, Chunbo;  Zeng, Huarong;  Yi, Zhiguo
  |  收藏  |  浏览/下载:65/0  |  提交时间:2019/12/26
On the cutoff law of laser induced high harmonic spectra 期刊论文  OAI收割
FRONTIERS OF PHYSICS, 2015, 卷号: 10, 期号: 2, 页码: 103201
作者:  
Guo DS;  Yu C;  Zhang JT;  Gao J;  Sun ZW(孙祉伟)
收藏  |  浏览/下载:44/0  |  提交时间:2015/07/21
Design of motion compensation mechanism of satellite remote sensing camera (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
Gu S.; Yan Y.; Xu K.; Jin G.
收藏  |  浏览/下载:47/0  |  提交时间:2013/03/25
With the development of aerospace remote sensing technology  the ground resolution of remote sensing camera enhances continuously. Since there is relative motion between camera and ground target when taking pictures  the target image recorded in recording media is moved and blurred. In order to enhance the imaging quality and resolution of the camera  the image motion had to be compensated. In order to abate the effect of image motion to image quality of space camera and improve the resolution of the camera  the compensation method of image motion to space camera is researched. First  the reason of producing drift angle and adjustment principle are analyzed in this paper. This paper introduce the composition and transmission principle of image motion compensation mechanism. Second  the system adopts 80C31 as controller of drift angle  and adopts stepping motor for actuators  and adopts absolute photoelectric encoder as the drift Angle measuring element. Then the control mathematical model of the image motion compensation mechanism are deduced  and it achieve the closed-loop control of the drift angle position. At the last  this paper analyses the transmission precision of the mechanism. Through the experiment  we measured the actual precision of the image motion compensation mechanism  and compared with the theoretical analysis. There are two major contributions in this paper. First  the traditional image motion compensation mechanism is big volume and quality heavy. This has not fit for the development trend of space camera miniaturization and lightweight. But if reduce the volume and quality of mechanism  it will bring adverse effects for the precision and stiffness of mechanism. For this problem  This paper designed a image motion compensation that have some advantages such as small size  light weight at the same time  high precision  stiffness and so on. This image motion compensation can be applicable to the small optics cameras with high resolution. Second  the traditional mechanism control need to corrected  fitting and iterative for the control formula of mechanism. Only in this way  we can get the optimal control mathematical model. This paper has high precision of the control formula derived. It can achieve the high precision control without fitting  It also simplify the difficulty of control mathematical model establishment. This paper designed the range of adjusting of image motion compensation mechanism between -5 +5. Based on choosing-5  -4  -3  -2  -1  0  +1  +2  +3  +4  +4 as the expectation value of the imaginary drift angle  we get ten groups of the fact data in adjusting drift angle measured. The test results show that the precision of the drift angle control system can be achieved in 1. It can meet the system requirements that the precision of the control system is less than 3'  and it can achieve the high-precision image motion compensation. 2011 SPIE.  
Application of particulate reinforced aluminum matrix composite in airborne photoelectric turret (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Electric Information and Control Engineering, ICEICE 2011, April 15, 2011 - April 17, 2011, Wuhan, China
作者:  
Wang P.
收藏  |  浏览/下载:24/0  |  提交时间:2013/03/25
In order to design and manufacture more excellent airborne photoelectric stable turret  modulus of elasticity of 213 GPa and thermal expansion coefficient of 7.9106/K. The frame has decreased the maximum deformation by by 60% and increased the fundamental frequency by 65% as compared with those of aluminum alloy materials  a new type of aeronautical material-particulate reinforced aluminum matrix composite (SiC/Al composite) is investigated. Several crucial technologies  respectively as shown by finite element analysis results. Those are confirmed by vibration test furthermore. Therefore  such as pressureless infiltration technology  a significant lightening effect is achieved and the thermal control load is also reduced. The test result indicates that the stable accuracy of the system achieves 19.8rad and the optical-axis parallelism of pay load is 0.1mrad. The research applies the SiC/Al composites to airborne photoelectric platforms  interface reaction controls and plate's welding are systematically studied. Then  which makes a effective exploration for the new aeronautical material's application. 2011 IEEE.  using SiC/Al composites  the airborne photoelectric stable turret frame is successfully prepared in density of 2.94 g/ cm3  
空间CCD凝视成像跟踪系统的作用距离分析 期刊论文  OAI收割
中国激光, 2008, 卷号: 35, 期号: 2, 页码: 173, 177
董吉辉; 胡企铨
收藏  |  浏览/下载:1180/157  |  提交时间:2009/09/18
Analysis of the disturbance of remote aerial detector induced by laser (EI CONFERENCE) 会议论文  OAI收割
High-Power Lasers and Applications III, November 8, 2004 - November 11, 2004, Beijing, China
作者:  
Zhou J.;  Fu Y.;  Guo J.;  Guo J.
收藏  |  浏览/下载:40/0  |  提交时间:2013/03/25
It is important to study the interaction effect between laser and photoelectric detector. In most of the laser detecting systems  laser must irradiate the photoelectric detector. The detector will be saturated or damaged easily if the fluence of the laser is higher than the saturation threshold of the detector. Now  many photoelectric detectors are used in space. To achieve their interaction  "Cat's eye" effect is applied to find and locate the remote aerial detector by laser. The possibility and mechanism of disturbance to remote aerial detector induced by laser are analyzed  and the factors of influence are also analyzed. The fluence of laser on the photoactive area of remote aerial detector is estimated. With two samples of CCD and TV tracking system  the mechanism of soft damage to CCD and TV tracking system induced by laser are introduced. The saturation of CCD and crosstalk of CCD are the main reasons of disturbance. When the tracking system is used in wave-door tracking mode  it will lose its tracking target if the saturation or crosstalk of CCD can enter into wave-door. At last  the influence to disturbance induced by atmosphere effect is also analyzed.