基于PLC的X光机智能控制系统  

Design of X-ray intelligent control system based on PLC

作　　者：邓玉福[1,2] 于彦泽 孟德川[1,2] 李晟栋 于桂英 DENG Yufu;YU Yanze;MENG Dechuan;LI Shengdong;YU Guiying(Collage of Physics and Technology,Shenyang Normal University,Shenyang 110034,China;Ray Instrumentation Engineering Technology Research Center of Liaoning Province,Shenyang Normal University,Shenyang 110034,China;Experimental Teaching Center,Shenyang Normal University,Shenyang 110034,China)

机构地区：[1]沈阳师范大学物理科学与技术学院,沈阳110034 [2]沈阳师范大学辽宁省射线仪器仪表工程技术研究中心,沈阳110034 [3]沈阳师范大学实验教学中心,沈阳110034

出　　处：《沈阳师范大学学报（自然科学版）》2018年第2期149-153,共5页Journal of Shenyang Normal University:Natural Science Edition

基　　金：辽宁省科技厅科学技术计划项目(20092069);沈阳市科技计划项目(F14-231-1-37)

摘　　要：X射线机是一种重要的检测设备。随着食品安全、医疗、工业检测等方面的广泛应用,对它的制造技术和检测精度不断提出更高的要求。针对传统X光机手动调节方式复杂,速度慢,准确性低等缺点,提出了一种高频X光机电源智能控制系统的设计方案,以PLC为核心控制区,实现了X光机的智能化控制。在控制系统中完成了管电压(kV)、管电流(mA)闭环反馈控制及过压过流检测等保护功能。经多次测试结果表明,该智能控制系统能够达到管电压0~300kV、X射线管小焦点电流0~3mA和大焦点电流0~10mA连续可调等目标。该智能控制系统具有外围电路简单、操作简便、设计灵活、工作稳定、精度高、软件开发周期短等优点,主要应用于工业无损检测等方面。X-ray machine is an important testing equipment.Along with the wide application of xray machine to food safety, medical treatment,industrial inspection,etc.,it is needed to increasingly improve its manufacturing technology and detection accuracy.To solve these defects,such as complex manual adjustment,slow respond and low measuring accuracy ect.,of traditional x-ray machine,we designed the intelligent high-frequency power supply control system of x-ray machine.With PLC as the core control zone,the intelligence control system of x-ray machine has been realized.In the control system,many functions,such as the closed-loop feedback control of tube voltage（kV）,tube current（mA）and over-voltage and over-current detection protection functions,become practical.The results of the measurements illustrate that,the intelligent control system can achieve the following goal,that is,continuous adjustment the tube voltage of 0~300 kV,the small-focus current 0~3 mA and the large-focus current of 0~10 mA.The intelligent control system has the advantages,such as simple peripheral circuits,easy and steady operation,flexible design,high precision,and short software development cycle,which can be practically applied in industrial non-destructive testing.

关 键 词：X光机 控制系统 PLC 高压开关电源 闭环控制 

分 类 号：TN86[电子电信—信息与通信工程]