原子能科学技术2011，Vol.45Issue(9)：1116-1119,4.
凸度仪X光机参数设置有效性的实验验证
Experimental Verification of Validity of Parameters of X-ray Module for Profile Gauge
摘要
Abstract
The instantaneous profile gauge uses two X-ray modules and two arrays of gas-filled ionization chambers to measure the thickness, crown and other parameters of steel strips. The energy and intensity of X-ray are the main factors that affect the measurement accuracy. In order to ensure the accuracy, it was assumed that thickness error caused by statistical fluctuation should be less than ±0. 06% according to GB/T 15636-2008, the theoretical maximum relative standard deviation of the detector signals was estimated at 180 kV X-ray tube voltage and 11 mA X-ray tube current, some steel strips were measured included in the gauge thickness range, and the relative standard deviation was calculated for each detector. The result indicates that the real statistical fluctuation can be less than the estimation value by averaging several raw data. So the set values of X-ray tube voltage and tube current of the X-ray module can meet the requirement of thickness accuracy.关键词
凸度仪/X射线/测厚/统计涨落Key words
profile gauge/ X-ray/ thickness measurement/ statistical fluctuation分类
能源科技引用本文复制引用
张玉爱,吴志芳,苗积臣,邢桂来,李立涛..凸度仪X光机参数设置有效性的实验验证[J].原子能科学技术,2011,45(9):1116-1119,4.基金项目
国家自然科学基金资助项目(10875068) （10875068）
北京市科技计划资助项目(Z080903027508) （Z080903027508）
