凸度仪系统机械系统加工精度对重建误差的影响研究  

Research on Reconstruction Error Affected by Mechanical Accuracy of X-ray Instantaneous Profile Gauge for Steel Strip

作　　者：邢桂来[1] 吴志芳[1] 苗积臣[1] 

机构地区：[1]清华大学核能与新能源技术研究院,北京100084

出　　处：《原子能科学技术》2011年第10期1250-1253,共4页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(10875068);北京市科技计划资助项目(Z080903027508)

摘　　要：双X射线源、双电离室探测器阵列构成的热轧钢板凸度仪,其机械部件多、尺度大,加工和安装难度高。在加工和安装过程中不可避免地存在误差,且误差会逐渐累积,表现为机械参数与设计值有偏差。本文基于实际凸度仪系统,研究机械参数的精度对凸度仪测量精度的影响规律。结果表明,适当加大射线源间的距离,以及提高射线源相对探测器的位置,可降低机械参数的精度对测量精度的影响;同时,如果系统的测量精度为0.1%,在忽略准直等问题后,则允许的机械加工的精度范围在数十mm。In the profile gauge for hot steel strip constructed with two X-ray sources and two arrays of gas-filled ion chambers,there＇re many components and their dimensions are commonly large.So there＇re many errors in the machining of the gauge.The errors are cumulated so that the mechanical parameters in the final gauge will be a little bit different from the design values.Based on the practice gauge,the principle how the parameters＇ difference affects the accuracy of the gauge was researched.The result shows that the effect will be reduced when the distance between the two X-ray sources is made bigger and the source positions are made higher from the detectors.Meanwhile if the accuracy is claimed to be 0.1%,the parameters＇ difference from the design values can be several ten millimeters.

关 键 词：凸度仪 机械精度 重建误差 

分 类 号：TL99[核科学技术—核技术及应用]