基于FPGA的数字多道脉冲幅度分析器设计

现代地质 ›› 2012, Vol. 26 ›› Issue (6): 1317-1321.

基于FPGA的数字多道脉冲幅度分析器设计

曾卫华¹，魏秋菊²

1 中国地质大学地球物理与信息技术学院，北京100083；2 河北地质职工大学，河北石家庄050081

收稿日期:2012-06-15 修回日期:2012-08-26 出版日期:2012-10-24 发布日期:2012-10-31
作者简介:曾卫华，男，讲师，1978年出生，地球物理工程专业，主要从事地球物理仪器的教学与科研工作。Email：zwh@cugb.edu.cn。
基金资助:
中央高校基本科研业务费专项资金资助项目(2-9-2012-59)。

Design of Digital Multichannel Analyzer Based on FPGA

ZENG Wei hua ^-1，WEI Qiu ju^-²

1 School of Geophysics and Information Technology, China University of Geosciences，Beijing100083, China；
2 Hebei Vocational College of Geosciences, Shijiazhuang, Hebei050081,China

Received:2012-06-15 Revised:2012-08-26 Online:2012-10-24 Published:2012-10-31

摘要/Abstract

摘要：

数字化多道脉冲幅度分析成为多道分析技术的主流，介绍了一种基于单FPGA芯片的数字脉冲幅度分析器的设计。采用EP3C40Q240作为数字核信号处理器，将ADC采集到的核信号进行数字积分、寻峰、阈值检测等数字处理，并得到能谱。系统通过高速RS485接口实现数字多道与上位机能谱分析软件的通信。最后给出了由NaI(Tl)探测器得到的核信号经数字多道处理后获得的137Cs能谱图。

关键词: 数字多道分析器, FPGA, 数字积分, RS485

Abstract:

Digital multi-channel pulse height analysis becomes the mainstream of multi-channel analysis technology. A digital multi-channel analyzer (DMCA) based on a single FPGA chip is introduced. The nuclear signals are processed by EP3C40Q240. It uses digital signals acquired by ADC to do calculus, seek the peaks, discriminate the threshold, and then form the energy spectrum. DMCA communicates with the RS485 bus interface. The software on PC can control DMCA and display energy spectrum. And the energy spectrum of 137Cs is given, which is obtained from NaI( Tl) detector and processed by DMCA.

Key words: digital multi-channel analyzer, FPGA, digital calculus, RS485

曾卫华, 魏秋菊. 基于FPGA的数字多道脉冲幅度分析器设计[J]. 现代地质, 2012, 26(6): 1317-1321.

CENG Wei-Hua, WEI Qiu-Ju. Design of Digital Multichannel Analyzer Based on FPGA[J]. Geoscience, 2012, 26(6): 1317-1321.

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