摘要
核信号的仿真与成形对核仪器的研发有重要意义。探测器输出的核信号有噪声并且十分微弱,不能被后续数据采集系统处理,所以需要对核信号进行滤波成形。高斯波形具有较好的信噪比,因此核信号通常是通过某种数学模型将其转化成高斯型信号。该文先通过MATLAB建立指数函数并叠加随机数噪声来进行核脉冲信号的仿真,再利用Sallen-Key滤波器对信号成形得到高斯信号,最后研究了成形参数对信号宽度的影响。研究结果表明Sallen-Key滤波方案是切实可行的,对探测器成行电路的设计有一定指导作用。
Nuclear signal simulation and shaping is great significance to the research and development of n- uclear instruments.The output signal of the detector with noise is too weak to be processed by the following data acquisition system,so it is necessary to filter the nuclear signal.As Gauss waveform has a good signal to noise ratio,the signal is usually converted into a Gauss signal by some mathematical model.Firstly nuclear s- ignal simulation with MATLAB in the this paper is established with an exponential function and random numbers.Then Sallen-Key filter is used to get the signal shaped into Gauss signal.Finally the effect of shaping parameters on the width of the signal is researched.The results show that the Sallen-Key filtering scheme is feasible and has a certain guiding effect on the desian of detector circuit.
作者
覃骏
周伟
杜洋
李扬红
徐晓娜
Qin Jun Zhou Wei Du Yang Li Yang-hong Xu Xiao-na(Institute of Nuclear Applications,East China University of Technology,Jiangxi Nanchang 330013 Institute of Nuclear Tech- niques,Chengdu University of Technology,Sichuan Chengdu 610059)
出处
《电子质量》
2017年第1期95-96,102,共3页
Electronics Quality
