中文摘要：

基于γ吸收法对原有的模拟式在线分析测量系统进行升级改造。改造后的测量系统包括探头、数字化谱仪和工业计算机三部分。探头和数字化谱仪实现γ射线透射强度测量,分别安装在壁龛内、外,工业计算机上配置上位机软件安装在主控室;上位机软件与数字化谱仪间的数据传输、命令控制通过CAN总线接口完成。经测试,本测量系统测量铀浓度的相对标准差为0.0294%;连续测量10 h,测量结果全部落在μ±3σ范围。

英文摘要：

The original analog on- line determination system for uranium concentration is upgraded based on gamma - ray absorption method. The transformed system consists of detector, digital spectrometry, and industrial computer. The detector and digital spectrometry are used to measure the transmitted intensity of gamma - ray. The detector is installed in the niche and the digital spectrometry is located beside the niche. The industrial computer, which is equipped with upper computer software, is installed in main control room for observation. The communication between the upper computer software and the digital spectrometry is established by using CAN bus interface. The testing results indicate that the relative standard deviation of the transformed instrument is 0. 0294%. The measured values of uranium concentration for 10 hours fall within μ±3σ range which shows that the stability of the system is good.