摘要
在252Cf裂变中子信号的随机过程分析中,引入功率谱密度分析方法,利用脉冲时间序列采集器结合PC主控处理机,构建了一种针对252Cf裂变中子信号的功率谱密度分析系统。该系统采用现场可编程门阵列(FPGA)和数字信号处理器(DSP)技术实现3通道中子脉冲时间序列的高精度在线检测;在PC机端对检测到的数据进行处理、相关计算、快速付里叶变换(FFT)及功率谱密度计算;设计并验证了简化的功率谱密度估计算法流程。系统能准确、高效地进行252Cf裂变中子信号检测,并得到相关函数、功率谱密度等主要特征参数。
The power spectrum density analysis method is incorporated in the analysis of 252Cf fission neutron random signal.An actual spectrum density analytic system for 252Cf neutron signals is constructed,which combines the pulse-time collector and PC processor.The system can on-line acquire the time series data of neutron pulses（3 channels） based on FPGA and DSP,and then implement the data processing,corre-lation calculation,FFT calculation and power spectrum density calculation on PC.A reduced power spectrum algorithm is designed simultaneously.The system can exactly detect the 252Cf neutron pulse and effectively obtain the results of characteristic parameters such as correlation function and power spectrum density,and then provide the effective preparation for the dynamic parameters measurement of 252Cf neutron source or reactor.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2010年第2期140-144,共5页
Nuclear Power Engineering
基金
重庆市科委自然科学基金项目(CSTC2007BB3174)资助
