| 曾家骏,何剑锋,袁兆林,汪雪元,祝 翔,陈谢熠阳.数字多道中双指数脉冲梯形成形算法的实现与测试[J].电子测量与仪器学报,2021,35(9):129-135 |
| 数字多道中双指数脉冲梯形成形算法的实现与测试 |
| Implementation and testing of double exponential pulsetrapezoidal shaping algorithm in DMCA |
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| DOI： |
| 中文关键词: 梯形成形 双指数核脉冲信号 FPGA 多道脉冲幅度分析器 |
| 英文关键词:trapezoidal shaping double exponential nuclear pulse FPGA DMCA |
| 基金项目:国家自然科学基金(11865002)、江西省重点研发计划（20203BBG73069）、江西省放射性地学大数据技术实验室开放基金(JELRGBDT201703)项目资助 |
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| Author | Institution |
| Zeng Jiajun | 1. School of Information Engineering, East China University of Technology,2. Big Data Technology Engineering Laboratory of Radiogeology,3. Jiangxi Institute of Nuclear and Geoscience Data Science and Systems Engineering Technology |
| He Jianfeng | 1. School of Information Engineering, East China University of Technology,2. Big Data Technology Engineering Laboratory of Radiogeology,3. Jiangxi Institute of Nuclear and Geoscience Data Science and Systems Engineering Technology，4. National Key Laboratory of Radioactive Geology and Exploration Technology |
| Yuan Zhaolin | 1. School of Information Engineering, East China University of Technology,2. Big Data Technology Engineering Laboratory of Radiogeology,3. Jiangxi Institute of Nuclear and Geoscience Data Science and Systems Engineering Technology |
| Wang Xueyuan | 1. School of Information Engineering, East China University of Technology,2. Big Data Technology Engineering Laboratory of Radiogeology,3. Jiangxi Institute of Nuclear and Geoscience Data Science and Systems Engineering Technology |
| Zhu Xiang | 1. School of Information Engineering, East China University of Technology,2. Big Data Technology Engineering Laboratory of Radiogeology,3. Jiangxi Institute of Nuclear and Geoscience Data Science and Systems Engineering Technology |
| Chen Xieyiyang | 1. School of Information Engineering, East China University of Technology,2. Big Data Technology Engineering Laboratory of Radiogeology,3. Jiangxi Institute of Nuclear and Geoscience Data Science and Systems Engineering Technology |
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| 中文摘要: |
| 数字化谱仪的实际应用中探测器输出的脉冲信号可以近似看作双指数脉冲,由于探测器存在电荷收集时间等原因造成
采集的脉冲幅度存在弹道亏损,不利于后续准确提取幅度,影响了探测系统的能量分辨率。 在 MATLAB 中对理想双指数脉冲
信号的梯形成形进行了仿真并在 Simulink 平台上建立模型使用理想双指数脉冲序列测试可行性;使用 HDLCoder 将 Simulink 逻
辑模型转换成 VerilogHDL 代码并在 ModelSim 上进行测试。 搭建硬件平台测试代码并将硬件平台应用到实测数据的处理中,通
过串口分别发送单峰多峰脉冲测试,使用嵌入式逻辑分析仪捕捉成形数据同时通过串口输出成形后的数据观察,结果显示双指
数脉冲信号梯形成形算法在 FPGA 中得到了较好的实现,恢复误差在 0. 2%以内。 实现的硬件平台对存在弹道亏损的脉冲有较
好的成形效果并具有一定的噪声滤除能力,可以作为数字多道脉冲幅度分析器设计开发的参考。 |
| 英文摘要: |
| In the actual application of the digital spectrometer, the pulse signal output by the detector can be approximately regarded as a
double exponential pulse. Due to the charge collection time of the detector, the collected pulse amplitude has ballistic loss, which is not
conducive to the subsequent accurate amplitude extraction and affects the energy resolution of detection system. In this paper, the
trapezoidal forming of ideal double exponential pulse signal is simulated in MATLAB, and the model is built on Simulink platform, and
the feasibility is tested by ideal double exponential pulse sequence. Use HDLCoder to convert Simulink logic model into VerilogHDL
code and test it on ModelSim. Build the hardware platform test code and apply the hardware platform to the processing of the measured
data, send single-peak and multi-peak pulse tests through the serial port, and use the embedded logic analyzer to capture the forming
data and output the formed data observation through the serial port. The trapezoidal algorithm of exponential pulse signal has been well
implemented in FPGA, and the recovery error is within 0. 2%. The implemented hardware platform has a good shaping effect on pulses
with ballistic losses and a certain noise filtering ability, which can be used as a reference for the design and development of digital multichannel pulse amplitude analyzers. |
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