核脉冲信号滤波成形电路的数字化研究
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摘要
核脉冲信号的滤波成形电路用于改变脉冲形状、提高核谱仪器系统的信噪比,从而获取更佳的性能指标。从极零相消电路与Sallen-Key电路的工作原理出发,推导了基于数字极零相消、数字Sallen-Key在时域中的成形递推函数,分别获取其在Z域中的传输函数,在频域中对其滤波性能、幅频响应特性进行了分析。对仿真核信号,采用数字极零相消、数字高斯成形递推函数模型,实现不同参数下的极零相消与高斯成形处理。对SiPIN探测器测量~(55)Fe和NaI探测器测量~(137)Cs的核脉冲信号,实现了数字极零相消、不同参数下的数字高斯成形处理,从时域与频域两个方面对结果进行了分析,研究成果可应用于核脉冲信号极零相消、滤波成形参数的最优化选取。
[Background] Filter shaping of pulsed signals is used to change the pulse shape and increase the system signal-to-noise ratio for better performance in a nuclear spectrometer system. [Purpose] This study aims at digitalization of filter shaping circuit for nuclear pulse signal. [Methods] Based on the principle of digital pole-zero cancellation and digital Sallen-Key in the time domain, the shape recursive function was derived, and the transfer function of them in the Z domain was obtained respectively. The filtering performance and amplitude-frequency response characteristics in the frequency domain were analyzed. Then the digital pole-zero cancellation and digital Gaussian shaping recursive function model are used to realize the simulated nuclear pulse signal processing with different parameters. Furthermore,~(55)Fe and~(137)Cs radioactive sources were measured with the Si-PIN detector and NaI detector respectively, obtained nuclear pulse signals were processed by the digital pole-zero cancellation and digital Gaussian shaping processing with different parameters. [Results and Conclusion] The results in both the time domain and the frequency domain show the efficiency of proposed digitalization approaches of filter shaping circuit for nuclear pulse signal. These approaches can be applied to the optimization of the pole-zero cancellation and filter shaping parameters of nuclear pulse signals.
[Background] Filter shaping of pulsed signals is used to change the pulse shape and increase the system signal-to-noise ratio for better performance in a nuclear spectrometer system. [Purpose] This study aims at digitalization of filter shaping circuit for nuclear pulse signal. [Methods] Based on the principle of digital pole-zero cancellation and digital Sallen-Key in the time domain, the shape recursive function was derived, and the transfer function of them in the Z domain was obtained respectively. The filtering performance and amplitude-frequency response characteristics in the frequency domain were analyzed. Then the digital pole-zero cancellation and digital Gaussian shaping recursive function model are used to realize the simulated nuclear pulse signal processing with different parameters. Furthermore,~(55)Fe and~(137)Cs radioactive sources were measured with the Si-PIN detector and NaI detector respectively, obtained nuclear pulse signals were processed by the digital pole-zero cancellation and digital Gaussian shaping processing with different parameters. [Results and Conclusion] The results in both the time domain and the frequency domain show the efficiency of proposed digitalization approaches of filter shaping circuit for nuclear pulse signal. These approaches can be applied to the optimization of the pole-zero cancellation and filter shaping parameters of nuclear pulse signals.
引文
1 Evariste W T,Hong S U,Yi Q,et al.Design and simulation of Gaussian shaping amplifier made only with CMOS FET for FEE of particle detector[J].Nuclear Science and Techniques,2010,21(5):312-315.DOI:10.13538/j.1001-8042/nst.21.312-315.
2张怀强,吴和喜,宁洪涛.基于Multisim的核信号仿真与高斯成形研究[J].核电子学与探测技术,2015,35(8):845-848.DOI:10.3969/j.issn.0258-0934.2015.08.023.ZHANG Huaiqiang,WU Hexi,NING Hongtao.Research on the simulation and Gaussian shaping of nuclear signal based on multisim software[J].Nuclear Electronics&Detection Technology,2015,35(8):845-848.DOI:10.3969/j.issn.0258-0934.2015.08.023.
3林斯波,葛愉成.基于Sallen-Key滤波器的主成形放大电路的研究[J].核电子学与探测技术,2015,35(4):408-410,416.DOI:10.3969/j.issn.0258-0934.2015.04.022.LIN Sibo,GE Yucheng.Study of main shaping amplifier circuit based on Sallen-Key filter[J].Nuclear Electronics&Detection Technology,2015,35(4):408-410,416.DOI:10.3969/j.issn.0258-0934.2015.04.022.
4张志勇,曾卫华,周舜铭,等.核能谱信号放大器脉冲成形电路的设计[J].核电子学与探测技术,2011,31(11):1300-1302.DOI:10.3969/j.issn.0258-0934.2011.11.027.ZHANG Zhiyong,ZENG Weihua,ZHOU Shunming,et al.Design of the nuclear pulse shaping circuit in nuclear spectrum signal amplifier[J].Nuclear Electronics&Detection Technology,2011,31(11):1300-1302.DOI:10.3969/j.issn.0258-0934.2011.11.027.
5李东仓,杨磊,田勇,等.基于Sallen-Key滤波器的核脉冲成形电路研究[J].核电子学与探测技术,2008,28(3):563-566.DOI:10.3969/j.issn.0258-0934.2008.03.028.LI Dongcang,YANG Lei,TIAN Yong,et al.Study of a nuclear pulse shaped circuit base in Sallen-Key filter[J].Nuclear Electronics&Detection Technology,2008,28(3):563-566.DOI:10.3969/j.issn.0258-0934.2008.03.028.
6 Zhou J B,Hong X,Wang R B,et al.Study of recursive model for pole-zero cancellation circuit[J].Nuclear Science and Techniques,2014,25(1):010403.DOI:10.13538/j.1001-8042/nst.25.010403.
7 Zhou J B,Zhou W,Lei J R,et al.Study of time-domain digital pulse shaping algorithms for nuclear signals[J].Nuclear Science and Techniques,2012,23(3):150-155.
8 Zhou J B,Zhou W,Hong X.Improvement of digital S-Kfilter and its application in nuclear signal processing[J].Nuclear Science and Techniques,2013,24(6):060401.DOI:10.13538/j.1001-8042/nst.2013.06.020.
9 Ge Q,Ge L Q,Yuan H W,et al.A new digital Gaussian pulse shaping algorithm based on bilinear transformation[J].Nuclear Science and Techniques,2015,26(1):010402.DOI:10.13538/j.1001-8042/nst.26.010402.
10张怀强,卢炜煌,汤彬.基于MATLAB的核脉冲信号数字成形实现与性能分析[J].核技术,2018,41(10):100401.DOI:10.11889/j.0253-3219.2018.hjs.41.100401.ZHANG Huaiqiang,LU Weihuang,TANG Bin.Digital shaping and performance analysis of nuclear pulse signal based on MATLAB[J].Nuclear Techniques,2018,41(10):100401.DOI:10.11889/j.0253-3219.2018.hjs.41.100401.
11洪旭,倪师军,周建斌,等.数字高斯脉冲成形算法仿真研究[J].核技术,2016,39(11):110403.DOI:10.11889/j.0253-3219.2016.hjs.39.110403.HONG Xu,NI Shijun,ZHOU Jianbin,et al.Simulation study on Gaussian pulse shaping algorithm[J].Nuclear Techniques,2016,39(11):110403.DOI:10.11889/j.0253-3219.2016.hjs.39.110403.
12蒋开明,黄洪全,杨小峰,等.基于S-K数字成形和种群技术的脉冲参数提取方法[J].核电子学与探测技术,2017,37(2):121-124.DOI:10.3969/j.issn.0258-0934.2017.02.003.JIANG Kaiming,HUANG Hongquan,YANG Xiaofeng,et al.Pulse parameter extraction method based on S-Kdigital shaping and population technique[J].Nuclear Electronics&Detection Technology,2017,37(2):121-124.DOI:10.3969/j.issn.0258-0934.2017.02.003.
13葛青,葛良全,李晓丽.基于冲激响应不变法的核信号数字滤波成形算法研究[J].核电子学与探测技术,2014,34(7):913-916.DOI:10.3969/j.issn.0258-0934.2014.10.011.GE Qing,GE Liangquan,LI Xiaoli.Research on digital shaping algorithm of the nuclear signal based on the same impulse response[J].Nuclear Electronics&Detection Technology,2014,34(7):913-916.DOI:10.3969/j.issn.0258-0934.2014.10.011.
14葛青,葛良全,薛雅娟.基于IIR滤波器的核信号数字高斯成形方法[J].核电子学与探测技术,2015,35(3):223-225,234.DOI:10.3969/j.issn.0258-0934.2015.03.001.GE Qing,GE Liangquan,XUE Yajuan.Method of digital Gaussian shaper for nuclear signals based on IIR digital filter[J].Nuclear Electronics&Detection Technology,2015,35(3):223-225,234.DOI:10.3969/j.issn.0258-0934.2015.03.001.
15周伟,周建斌,雷家荣,等.基于Sallen-Key滤波器的数字高斯成形方法的仿真[J].系统仿真学报,2013,25(1):195-196.DOI:10.16182/j.cnki.joss.2013.01.021.ZHOU Wei,ZHOU Jianbin,LEI Jiarong,et al.Simulation of digital gaussian filtering based on SallenKey filter[J].Journal of System Simulation,2013,25(1):195-196.DOI:10.16182/j.cnki.joss.2013.01.021.
2张怀强,吴和喜,宁洪涛.基于Multisim的核信号仿真与高斯成形研究[J].核电子学与探测技术,2015,35(8):845-848.DOI:10.3969/j.issn.0258-0934.2015.08.023.ZHANG Huaiqiang,WU Hexi,NING Hongtao.Research on the simulation and Gaussian shaping of nuclear signal based on multisim software[J].Nuclear Electronics&Detection Technology,2015,35(8):845-848.DOI:10.3969/j.issn.0258-0934.2015.08.023.
3林斯波,葛愉成.基于Sallen-Key滤波器的主成形放大电路的研究[J].核电子学与探测技术,2015,35(4):408-410,416.DOI:10.3969/j.issn.0258-0934.2015.04.022.LIN Sibo,GE Yucheng.Study of main shaping amplifier circuit based on Sallen-Key filter[J].Nuclear Electronics&Detection Technology,2015,35(4):408-410,416.DOI:10.3969/j.issn.0258-0934.2015.04.022.
4张志勇,曾卫华,周舜铭,等.核能谱信号放大器脉冲成形电路的设计[J].核电子学与探测技术,2011,31(11):1300-1302.DOI:10.3969/j.issn.0258-0934.2011.11.027.ZHANG Zhiyong,ZENG Weihua,ZHOU Shunming,et al.Design of the nuclear pulse shaping circuit in nuclear spectrum signal amplifier[J].Nuclear Electronics&Detection Technology,2011,31(11):1300-1302.DOI:10.3969/j.issn.0258-0934.2011.11.027.
5李东仓,杨磊,田勇,等.基于Sallen-Key滤波器的核脉冲成形电路研究[J].核电子学与探测技术,2008,28(3):563-566.DOI:10.3969/j.issn.0258-0934.2008.03.028.LI Dongcang,YANG Lei,TIAN Yong,et al.Study of a nuclear pulse shaped circuit base in Sallen-Key filter[J].Nuclear Electronics&Detection Technology,2008,28(3):563-566.DOI:10.3969/j.issn.0258-0934.2008.03.028.
6 Zhou J B,Hong X,Wang R B,et al.Study of recursive model for pole-zero cancellation circuit[J].Nuclear Science and Techniques,2014,25(1):010403.DOI:10.13538/j.1001-8042/nst.25.010403.
7 Zhou J B,Zhou W,Lei J R,et al.Study of time-domain digital pulse shaping algorithms for nuclear signals[J].Nuclear Science and Techniques,2012,23(3):150-155.
8 Zhou J B,Zhou W,Hong X.Improvement of digital S-Kfilter and its application in nuclear signal processing[J].Nuclear Science and Techniques,2013,24(6):060401.DOI:10.13538/j.1001-8042/nst.2013.06.020.
9 Ge Q,Ge L Q,Yuan H W,et al.A new digital Gaussian pulse shaping algorithm based on bilinear transformation[J].Nuclear Science and Techniques,2015,26(1):010402.DOI:10.13538/j.1001-8042/nst.26.010402.
10张怀强,卢炜煌,汤彬.基于MATLAB的核脉冲信号数字成形实现与性能分析[J].核技术,2018,41(10):100401.DOI:10.11889/j.0253-3219.2018.hjs.41.100401.ZHANG Huaiqiang,LU Weihuang,TANG Bin.Digital shaping and performance analysis of nuclear pulse signal based on MATLAB[J].Nuclear Techniques,2018,41(10):100401.DOI:10.11889/j.0253-3219.2018.hjs.41.100401.
11洪旭,倪师军,周建斌,等.数字高斯脉冲成形算法仿真研究[J].核技术,2016,39(11):110403.DOI:10.11889/j.0253-3219.2016.hjs.39.110403.HONG Xu,NI Shijun,ZHOU Jianbin,et al.Simulation study on Gaussian pulse shaping algorithm[J].Nuclear Techniques,2016,39(11):110403.DOI:10.11889/j.0253-3219.2016.hjs.39.110403.
12蒋开明,黄洪全,杨小峰,等.基于S-K数字成形和种群技术的脉冲参数提取方法[J].核电子学与探测技术,2017,37(2):121-124.DOI:10.3969/j.issn.0258-0934.2017.02.003.JIANG Kaiming,HUANG Hongquan,YANG Xiaofeng,et al.Pulse parameter extraction method based on S-Kdigital shaping and population technique[J].Nuclear Electronics&Detection Technology,2017,37(2):121-124.DOI:10.3969/j.issn.0258-0934.2017.02.003.
13葛青,葛良全,李晓丽.基于冲激响应不变法的核信号数字滤波成形算法研究[J].核电子学与探测技术,2014,34(7):913-916.DOI:10.3969/j.issn.0258-0934.2014.10.011.GE Qing,GE Liangquan,LI Xiaoli.Research on digital shaping algorithm of the nuclear signal based on the same impulse response[J].Nuclear Electronics&Detection Technology,2014,34(7):913-916.DOI:10.3969/j.issn.0258-0934.2014.10.011.
14葛青,葛良全,薛雅娟.基于IIR滤波器的核信号数字高斯成形方法[J].核电子学与探测技术,2015,35(3):223-225,234.DOI:10.3969/j.issn.0258-0934.2015.03.001.GE Qing,GE Liangquan,XUE Yajuan.Method of digital Gaussian shaper for nuclear signals based on IIR digital filter[J].Nuclear Electronics&Detection Technology,2015,35(3):223-225,234.DOI:10.3969/j.issn.0258-0934.2015.03.001.
15周伟,周建斌,雷家荣,等.基于Sallen-Key滤波器的数字高斯成形方法的仿真[J].系统仿真学报,2013,25(1):195-196.DOI:10.16182/j.cnki.joss.2013.01.021.ZHOU Wei,ZHOU Jianbin,LEI Jiarong,et al.Simulation of digital gaussian filtering based on SallenKey filter[J].Journal of System Simulation,2013,25(1):195-196.DOI:10.16182/j.cnki.joss.2013.01.021.