基于PGNAA法检测输油管道油垢厚度的初步实验研究

摘要

为改进石油输送过程中的油垢检测方法,应用PGNAA(瞬发γ射线中子活化分析)法对管道同一横截面处不同探测角度时不同石蜡(模拟油垢)厚度进行γ光子计数,研究发现γ光子计数响应与探测角度有很大关系.探测角度为135°时线性相关系数的平方和测量精度都是最佳,达到0.9986和0.906mm.本工作对PGNAA法检测油垢厚度选择最佳的探测角度提供了实验基础.%In order to improve the measurement method of grease stain thickness in oil pipeline, we use PGNAA (prompt gamma neutron activation analysis) method, and count (Υ) photon for the same crosssectional area of oil pipeline with different thickness of paraffin (simulating grease ). We found that the (Υ) photon counting response was related to detection angle . The value of square of coefficient of linear and measuring accuracy was best with angle of detection was 135° The value was 0.9986 and 0.906mm. This work provided a experimental basis to detect grease stain thickness for choosing the best angle of detection with PGNAA method .