基于FPGA的数字化多道脉冲幅度分析器的设计

摘要

为能进行高速能谱分析,得到高效、高精确度的能谱数据,提出了基于FPGA的数字化多道脉冲幅度分析器的设计方案.采用A3P250作为核心处理器件,对ADC采样数字化的脉冲信号进行捕获,并完全采用FPGA数字化处理实现多道脉冲幅度分析,完成有效信号判断、信号峰值判断、信号幅度分析等数字处理,得到能谱数据.并且采用FPGA内部串口模块与外部进行通讯,进行能谱数据的传送.按照该方案设计的多道脉冲幅度分析器已应用于自然伽马能谱测井仪器以及其他核测井仪器中,得到了高效的能谱数据,为能谱分析提供了保证.%In order to analyze energy spectrum in high speed and get high-efficiency and high-precision energy spectrum data, a design scheme of digital multi-channel pulse amplitude analyzer is proposed based on the FPGA.A3P250 is used as the core of processing device.The digital pulse signal is obtained from AD sampling, and effective signal judgment, signal peak value judgment, signal amplitude analysis are implemented by FPGA digital processing completely to get energy spectrum data.And FPGA internal UART module is used to communicate with outside so to send energy spectrum data.The multi-channel pulse amplitude analyzer is applied to Natural Gamma-ray Spectral logging tool and other nuclear logging tools.It gets high-efficiency energy spectrum data and provides a guarantee for energy spectrum analyzing.