光信号自动拾取丝扫描测量系统设计

邵中尉; 韩定定; 龚培荣

doi:10.3969/j.issn.1000-5641.2018.01.012

光信号自动拾取丝扫描测量系统设计

doi: 10.3969/j.issn.1000-5641.2018.01.012

1.
华东师范大学信息科学技术学院, 上海 200241
2.
中国科学院上海应用物理研究所, 上海 201204

详细信息

作者简介:
邵中尉, 男, 硕士研究生, 研究方向为束线光束工程.E-mail:1575345317@qq.com

通讯作者:
韩定定, 女, 教授, 博士生导师, 研究方向为复杂网络与智能信息处理.E-mail:ddhan@ee.ecnu.edu.cn

中图分类号: TL81
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- 文章访问数: 263
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- 被引次数: 0
出版历程
- 收稿日期: 2016-12-27
- 刊出日期: 2018-01-25

Beam automatic detection wire scanner system design

1.
School of Information Science and Technology, East China Normal University, Shanghai 200241, China
2.
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China

摘要

摘要: 为了提高同步辐射丝扫描探测器的测量分辨率与缩短数据处理时间，设计了光信号自动拾取丝扫描测量系统.该系统采用多进程优先级机制管理采样过程，对信号进行降噪处理后使用Allen函数对信号幅度变化特征进行放大，长短时平均法与赤池准则结合拾取光信号，自动确定拟合区间，同时采用能量变化法对高斯拟合参数初值进行估测.经实验验证，该测量系统拾取光信号位置准确，可有效提高丝扫描探测器的测量分辨率，缩短数据处理用时.
- 同步辐射 /
- 丝扫描 /
- 信号处理 /
- 分辨率
Abstract: A beam automatic detection wire scanner system was developed to improve the measurement resolution and shorten the data processing time. The system managed the sampling process by multi-process priority mechanism, using Allen function to amplify signal variation characterization after signal processing. Fitting range was recognized based on short time average/long time average and Akaike information criterion, and fitting parameter initial values were determined by energy gradient curve. It is found that the system detects beam accurately and improves the measurement resolution and shortens data processing time.
- synchrotron radiation /
- wire scanner /
- signal processing /
- resolution

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图 1 丝扫描探测器结构示意图

Fig. 1 Schematic diagram of wire scanner

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图 2 预处理前后信号对比

Fig. 2 Comparison of signal preprocessing before and after

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图 3 长短时平均法处理结果

Fig. 3 Result of STA/LTA process

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图 4 赤池准则检测结果

Fig. 4 Results of AIC process

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图 5 能量变化率计算结果

Fig. 5 Results of energy gradient

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图 6 系统测试结果

Fig. 6 The results of system test

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表 1 长短时平均法判断结果

Tab. 1 Judging results of STA/LTA

	STA/LTA超过阈值位置	范围预测
光信号出现位置	$i=357$	307 $\sim $ 407
光信号消失位置	$i=1\;754$	1 704 $\sim $ 1 804

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表 2 拟合参数估测值

Tab. 2 Fitting initial parameters guess

	数学期望 $\mu $	标准差 $\sigma $	偏置常数 $c$ /mV	最大幅值 $m$ /mV
估测值	868	328.5	-2.698	87.529

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参考文献(10)

[1]	KOCSIS M, FAJARDO P, GRENOBLE E. High spatial resolution X-ray beam position monitor[C]//IEEE Nuclear Science Symposium Conference Record, 2005. IEEE, 2005, 3: 1223-1225. http://ieeexplore.ieee.org/xpl/articleDetails.jsp?reload=true&arnumber=1596539&filter%3DAND(p_IS_Number%3A33581)
[2]	KREJCIK P, CAMPELL M, D'EWART J, et al. Performance of the new fast wire scanner at the LCLS[C]//Proceedings of the 4th International Beam Instrumentation Conference (IBIC2015). 2016: 547-549. http://www.irgrid.ac.cn/handle/1471x/1071046
[3]	龚培荣, 徐慧超, 周剑英, 等.上海光源光束线前端区XBPM探测器[J].核电子学与探测技术, 2015, 35(5):281-286. http://www.irgrid.ac.cn/handle/1471x/1004017
[4]	龚培荣, 何迎花, 周剑英.丝扫描探测器测量同步辐射X光的位置和尺寸[J].核电子学与探测技术, 2016, 36(3):274-278. http://www.cnki.com.cn/Article/CJFDTotal-HERE201603010.htm
[5]	ALLEN R V. Automatic earthquake recognition and timing from single traces[J]. Bulletin of the Seismological Society of America, 1978, 68(5):1521-1532. https://pubs.geoscienceworld.org/bssa/article-lookup/68/5/1521
[6]	ALLEN R. Automatic phase pickers:Their present use and future prospects[J]. Bulletin of the Seismological Society of America, 1982, 72(6B):S225-S242. https://pubs.geoscienceworld.org/bssa/article-lookup/72/6B/S225
[7]	BAER M, KRADOLFER U. An automatic phase picker for local and teleseismic events[J]. Bulletin of the Seismological Society of America, 1987, 77(4):1437-1445. https://www.researchgate.net/publication/215755718_An_Automatic_phase_picker_for_local_and_teleseismic_events
[8]	EARLE P S, SHEARER P M. Characterization of global seismograms using an automatic-picking algorithm[J]. Bulletin of the Seismological Society of America, 1994, 84(2):366-376. https://www.researchgate.net/publication/228077555_Characterization_of_Global_Seismograms_Using_an_Automatic-Picking_Algorithm
[9]	MAEDA N. A method for reading and checking phase times in auto-processing system of seismic wave data[J]. Zisin, 1985, 38(3):365-379. doi: 10.4294/zisin1948.38.3_365
[10]	MARQUARDT D W. An algorithm for least-squares estimation of nonlinear parameters[J]. Journal of the Society for Industrial and Applied Mathematics, 1963, 11(2):431-441. doi: 10.1137/0111030