车载γ能谱仪数据实时传输系统设计  

Real-Time Data Transmission System for Carborneγ-Ray Spectrometer

作　　者：杨剑[1] 曾国强[1] 赖茂林[1] 张开琪 葛良全[1] 王涛[1] 

机构地区：[1]成都理工大学地学核技术重点实验室,成都610051

出　　处：《核电子学与探测技术》2016年第5期466-469,474,共5页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金资助项目(41474159);国家863计划项目(2012AA061803);地学核技术四川省重点实验室开放基金资助项目(gnzds2014006)

摘　　要：传统γ能谱仪采用小体积探测器和串口传输数据,不能满足车载谱仪大体积多探测器快速巡测的大数据量传输的要求,且存在多探测器时间协同问题。论文采用两个4 L大体积Na I(Tl)闪烁体晶体提高探测速率,使用GPS秒脉冲时钟同步独立数字多道进行谱线测量,谱线数据通过CAN总线传输到能谱仪主机并与GPS信息进行打包,再通过无线Wi-Fi高速传输到电脑进行谱线和核素分析,从而保证了时间精度和传输速度的要求,最后将分析结果传输到远程服务器用于实时评估环境辐射情况。The traditional γ-ray spectrometer uses small volume detector and serial port to transfer data. It cannot apply to the transmission of sizable data for the fast patrol carborne spectrometer using the large volume and multi - detectors, and also exists the time synchronization problems of multiple detectors. This paper uses two 4 L large volume NaI （Tl） scintillation crystals to improve measurement efficiency and GPS PPS clock to synchronize the measurements of independent digital multi - channel pulse amplitude analyzers. The spectral data are transferred with the information to the host machine of spectrometer through the high - speed CANbus and then integrated of GPS. The integrated data are high - speed transferred to computer for spectral analysis through Wi - Fi. This approach guarantees the accurate time and high - speed transmission. The results of anal- ysis are transferred to remote server for real - time assessment of environmental radiation.

关 键 词：车载 Γ谱仪 CAN总线 WI-FI 全球定位系统 

分 类 号：TL81[核科学技术—核技术及应用]