基于碳纳米管的冷阴极X射线检测技术及其应用  

Cold Cathode X-Ray Detection Technology Based on Carbon Nanotubes and Its Application

作　　者：王波[1,2] 罗朝莉 朱冰 刘小军[2] 陈林 WANG Bo;LUO Zhao-li;ZHU Bing;LIU Xiao-jun;CHEN Lin(School of Electronic Engineering,Xi an Shiyou University,Xi,an 710065,China;Xi an Tsukuba Technology Co.,Ltd.,Xi an 710075,China)

机构地区：[1]西安石油大学电子工程学院,陕西西安710065 [2]西安筑波科技有限公司,陕西西安710075

出　　处：《真空电子技术》2023年第6期28-33,共6页Vacuum Electronics

摘　　要：针对热阴极X射线检测成像时存在的系统预热耗时长、寿命短、体积大、对外辐射剂量大等问题,提出采用碳纳米冷阴极X射线检测系统代替热阴极系统。冷阴极X射线管可通过栅极电压控制X射线管的管电流,具有良好的脉冲响应。本系统以具有场致发射特征的电子源制备成发射X射线源,配备平板探测器和可充电锂电池,建立区域无线网络,实现无线远程控制脉冲X射线源激发与平板探测器接收。利用该系统对耐张线夹、电力排管、焊缝内部缺陷进行检测研究。结果表明:该系统能够在计算机控制端即时成像,快速检出耐张线夹内部压接质量、电力排管内部氧化堆积物、焊缝内部气孔及裂缝缺陷等。利用该技术可大幅提高检测效率,对电力、石油管道、核电等领域的无损检测具有一定的应用价值。In order to solve the problems of long preheating time,short life,huge volume and large radiation exposure of the system in hot cathode X-ray detection imaging,a carbon nano cold cathode X-ray system is proposed.The cold cathode X-ray tube can control the tube current of the X-ray tube by gate voltage,and it has good pulse response.This system uses an electronic source with field emission characteristics to prepare an emission X-ray source,equipped with a flat panel detector and a rechargeable lithium battery.A regional wireless network is established to achieve wireless remote control of pulse X-ray source excitation and flat panel detector reception.This system can be used to detect and study internal defects in tension clamps,power pipes,and welds.The results show that the constructed cold cathode X-ray detection system can quickly image at the computer controller,quickly detect the internal crimping quality of the tension clamp,oxidation deposits inside the power pipe,internal pores and crack defects in the weld seam,etc.This technology can greatly improve the detection efficiency,and has certain application value for non-destructive testing in fields such as power,oil pipelines,and nuclear power.

关 键 词：碳纳米管 冷阴极X射线 场致发射 无线远程控制 

分 类 号：TN14[电子电信—物理电子学]