低功耗多道脉冲幅度分析器研制  

Development of Low-power Multi-channel Analyzer

作　　者：李兆龙 谢裕颖 刘亚建 陈祖良 傅建新 陈蝶芬 沈美玲 郭雄斌 LI Zhao- long XIE Yu- ying LIU Ya-jian CHEN Zu- liang FU Jian- xin CHEN Die - fen SHEN Mei - ling GUO Xiong - bin(Zhejiang Institute of Energy and Nuclear Technology, Hangzhou 310012, China)

机构地区：[1]浙江省能源与核技术应用研究院,杭州310012

出　　处：《核电子学与探测技术》2016年第11期1167-1171,共5页Nuclear Electronics & Detection Technology

基　　金：浙江省科技计划项目(2014F30027)资助

摘　　要：以ARM Cortex-M0+处理器LPC11U68为核心,研制了一款多道脉冲幅度分析器。该多道脉冲幅度分析器采用多重反馈型2阶积分滤波成形电路,对峰值保持电路进行改进,引入智能化硬件——TFT触摸屏,利用USB2.0接口实现与PC端的通信,移植整合了μC/OS-II和μC/GUI。性能测试表明:该仪器配置GM26金硅面垒探测器,其能量分辨率为2.6%;道址—脉冲幅度线性相关系数为0.997;重复性、稳定性良好,峰漂小于0.4%。The multi- channel analyzer （MCA） adopted an ARM Cortex- M0 ＋ based LPC11U68 mierocontroller as the controlling core was developed. Based on multi - feedback mechanism, the two - order filter was designed as the pulse shaping circuit of the MCA. Tile pulse peak - holding circuit and USB2.0 port were de- signed as well. In the develop process of intelligent hardware and software, the TFT Touch - Screen was used and the μC/OS- Ⅱ and μC/GUI were transplanted successfully into LPC11 U68. The performance test results showed that the energy resolution of the MCA configured with GM26 Au - Si surface barrier detector was 2.6%. The linear correlation coefficient between channel and pulse amplitude was 0. 997. The repeatability and stability were good, and the peak - shifting was less than 0.4%.

关 键 词：多道脉冲幅度分析 ARM 滤波成形 多重反馈 ΜC/OS-II ΜC/GUI 

分 类 号：TL822[核科学技术—核技术及应用]