中国科学院机构知识库网格系统: 检索

Solar-blind UV signal detection system 会议论文 OAI收割
Beijing, China, 2023-07-25
作者: Xiang, Junjie; Bai, Yonglin; Cao, Weiwei

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收藏 | 浏览/下载：17/0 | 提交时间：2024/02/07

signal acquisition solar-blind ultraviolet β-Ga2O3 photoconductive sensor

Precise Loran-C Signal Acquisition Based on Envelope Delay Correlation Method 期刊论文 OAI收割
SENSORS, 2020, 卷号: 20, 期号: 8, 页码: 15
作者: Yan, Wenhe; Zhao, Kunjuan; Li, Shifeng; Wang, Xinghui; Hua, Yu

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收藏 | 浏览/下载：17/0 | 提交时间：2020/09/01

Loran-C signal acquisition envelope delay correlation cross-rate interference

A novel method to real-time offset correction for frame transfer CCD 会议论文 OAI收割
8th international symposium on advanced optical manufacturing and testing technologies: optoelectronic materials and devices, aomatt 2016, suzhou, china, 2016-04-26
作者: Chen, Zhi; Wen, Yan; Yao, Dalei; Jiang, Baotan

收藏 | 浏览/下载：25/0 | 提交时间：2016/12/20

CCD cameras Charge coupled devices Digital storage Image acquisition Manufacture Materials testing Optical data processing Optoelectronic devices Processing Shift registers Signal processing

Orbit improvement for Chang'E-5T lunar returning probe with GNSS technique 期刊论文 OAI收割
ADVANCES IN SPACE RESEARCH, 2015, 卷号: 56, 期号: 11, 页码: 2473-2482
作者: Fan, Min; Hu, XiaoGong; Dong, Guangliang; Huang, Yong; Cao, Jianfeng

收藏 | 浏览/下载：70/0 | 提交时间：2016/01/14

Chinese lunar exploration program Global navigation satellite system Weak signal acquisition and tracking performance Fusion processing of space- and ground-based data Accuracy of orbit determination and prediction

基于振动信号处理的滚动轴承故障检测方法研究 学位论文 OAI收割
工学硕士, 中国科学院自动化研究所: 中国科学院研究生院, 2011
蒋志同

收藏 | 浏览/下载：291/0 | 提交时间：2015/09/02

滚动轴承小波分析振动信号故障诊断特征提取数据采集系统 rolling bearings wavelet analysis vibration signal fault diagnosis feature extraction data acquisition system

A harmonic coil measurement system based on a dynamic signal acquisition device 期刊论文 iSwitch采集
Nuclear instruments & methods in physics research section a-accelerators spectrometers detectors and associated equipment, 2010, 卷号: 624, 期号: 3, 页码: 549-553
作者: Zhou, J. X.; Li, L.; Yin, B. G.; Deng, C. D.; Kang, W.

收藏 | 浏览/下载：28/0 | 提交时间：2019/04/23

Dc and ac magnetic field measurements Harmonic coil Dynamic signal acquisition device Digital bucking

Small aircraft CAN bus signal acquisition equipment (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
Chen C.-Q.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

Small aircraft often used RS485 bus. But with the complexity of the small aircraft's subsystems increase and the progress of field bus technology CAN bus systems in small aircraft use more and more widely. How to record real-time flight experiment data on the small aircraft's CAN bus and provide test data for reproducing the process of a small aircraft flying is very important. This paper presents a design method of signal acquisition device it can be used for small aircraft flying field experiment. 2010 IEEE. as the main chip with DSP2812 SJA1000 as CAN controller CTM1050 as the CAN transceiver CF card as storage media. Gives the diagram of its hardware and software design process. Combined with the background of a small aircraft testing the instrument for data acquisition when the ground experiments and flight progress. Experimental data show that the design of high reliability and CAN signals can effectively complete the record

Design and image restoration research of a cubic-phase-plate system (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, April 26, 2010 - April 29, 2010, Dalian, China
作者: Zhang J.; Zhang J.; Zhang J.; Shi G.; Zhang X.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

Wave-front coding technology is a novel jointly optical and digital imaging technology which can greatly extend the depth of focus of optical systems. The image restoration process is an important part of wave-front coding technology. Using wave-front coding makes the modulation transfer function(MTF) values of the optical systems change little over a range of several times the depth of focus which means the system MTF is quite insensitive to defocus and there is no zero in the passband. So we can design a single filter for the restoration of images in different defocus positions. However it's hard to avoid noise during image acquisition and transmission processes. These noises will be amplified in the image restoration especially in the high frequency part when the MTF drop is relatively low. The restoration process significantly reduces the system signal to noise ratio this way. Aimed at the problem of noise amplification a new algorithm was proposed which incorporated wavelet denoising into the iterative steps of Lucy-Richardson algorithm. Better restoration results were obtained through the new algorithm effectively solving the noise amplification problem of original LR algorithm. Two sets of identical triplet imaging systems were designed in one of which the cubic-phase-plate was added. Imaging experiments of the manufactured systems were carried and the images of a traditional system and a wave-front coded system before and after decoding were compared. The results show that the designed wave-front coded system can extend the depth of focus by 40 times compared with the traditional system while maintaining the light flux and the image plane resolution. 2010 Copyright SPIE - The International Society for Optical Engineering.

Model identification and closed-loop confirmation for opto-electronic platform of seeker (EI CONFERENCE) 会议论文 OAI收割
2010 2nd International Conference on Industrial Mechatronics and Automation, ICIMA 2010, May 30, 2010 - May 31, 2010, Wuhan, China
作者: Liu H.; Zhang J.; Zhang J.; Zhang J.; Chen J.

收藏 | 浏览/下载：33/0 | 提交时间：2013/03/25

A mathematical model of seeker opto-electronic platform is the basis for researching performance designing a servo control system and simulating. Focusing on high frequencies of mechanical resonant restriction of gimbaled axis rotation a new model identification method was proposed under the pseudo-random invert-M-sequences. The testing signal data acquisition the calculating of frequency response and least square identification were investigated. The realized steps are explicitly illustrated and the testing example is given in this paper the results confirm that the proposed method is effective and practical. 2010 IEEE.

Method for recovering dynamic position of photoelectric encoder (EI CONFERENCE) 会议论文 OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 19, 2008 - November 21, 2008, Chengdu, China
作者: Sun Y.; Liu Y.-S.; Liang L.-H.; Sun Y.; Wan Q.-H.

收藏 | 浏览/下载：16/0 | 提交时间：2013/03/25

This paper presents a method to recover dynamic position of photoelectric encoder. While working at dynamic state original outputs of the photoelectric encoder are in theory two sine or triangular signals with a phase difference of /2. However there are still deviations of actual output signals. Interpolating on the basis of this deviation signal will result in interpolation errors. In dynamic state true original signal data obtained by data acquisition system is a time equation. Through processing these data by data equiangular and harmonic analysis the equation will be converted from time domain to position domain and an original position equation can be formed. Then the interpolation errors also can be obtained. By this method the interpolation errors can be checked in dynamic state and it can also provide electric interpolation basis so that to improve dynamic interpolation precision of the encoder. Software simulation and experimental analysis all prove the method effective. This method is he basis in theory for precision checking and calibration in motion. 2009 SPIE.