基于FPGA的高速峰值检测

High- speed Peak Detecting Based On FPGA

针对研发数字多道的实际需求,提出了一种基于FPGA的高速峰值检测技术,并且采用ARM+FPGA的架构实现了基于该技术的数字多道系统。通过Modelsim仿真分析了FPGA峰值检测算法的理论,该算法可精确获取高斯信号的最值并获得幅度值。最后通过CZT探测器进行^(241)Am源实测γ射线能谱,实验结果表明该峰值检测算法及数字多道系统设计可准确并且快速获得能谱图。通过合理设置峰值检测算法的高低阈值,可以测试不同基线值的前放信号。

For the development of digital multi- channel real demand,we propose a high- speed peak detection technology based on FPGA,and we use the ARM ＋ FPGA architecture to realize the digital multi- channel system based on this peak detection technology. Using the Modelsim software to simulate,the algorithm can accurately obtain the extreme value for Gaussian signals and obtain amplitude values. Then,we used the CZT detector and-（241）Am gamma- ray to test the digital multi- channel system,experimental results show that the peak detection algorithm and digital multi- channel system can accurately and quickly get energy spectrum. And by setting the algorithm a reasonable threshold level,it can test different baseline values of the preamplifier signal.