Designed Of X-Ray Control System Based On PLC

Since the discovery of X-rays at the end of the 19 th century,Xenon has made X-rays more closely connected with people's production and life because of the special nature of X-rays.X-rays have been widely used in security,aerospace technology,industrial non-destructive testing,military,food safety and medical science and many other fields.With the continuous development of X-ray technology and its rapid advancement in technology,people's dependence on X-rays will continue to increase in the future.Traditional X-ray machines occupy a large area,carry heavy loads,have complex adjustment methods,are slow,have poor accuracy,and have low reliability.The resulting X-rays have poor quality and result in low image quality.Therefore,traditional power frequency X-ray machines have been phased out.With the rapid advancement of science and technology,the liberation of labor has become an inevitable trend,and automation will inevitably become a trend.Modern X-ray machines use single-chip microcomputers,DSPs,FPGAs,ARMs,and PLCs to control high-frequency,modular,and intelligent development.In order to produce stable and high-quality X-rays,this article proposes and designs a PLC-based X-ray machine intelligent control system.The new high-voltage DC switching power supply and high-frequency filament power supply technology are applied to the control circuit with Siemens PLC as the control core.The aim is to design a light-weight,small-size,convenient operation and digitization of high-voltage DC switching power supply and filament power supply.And intelligent control.The experimental design of dual DA output,three AD sampling,real-time control and regulation,alarm information feedback,so that the X-ray machine to complete the tube voltage(kV)and tube current(mA)control and output settings.In order to make the system work stable,the HCNR200 optocoupler is used as an isolation device to ensure stable X-ray output.The completed software design part mainly includes the main program(parameter setting program),time count program,protection program,small focus PID program,large focus PID program,negative high pressure PID program,training program,negative high voltage + small focus program,negative High-voltage + large-focus program,alarm program,touch screen program,etc.After many tests and debugging,the experimentally designed intelligent control system can achieve the expected results and technical indicators.The control system adopts PLC control to achieve the tube voltage 0-300 kV,small focus current 0-3mA and large focus current 0-10 mA continuously adjustable.All-digital control is realized.The control system has the advantages of simple peripheral circuits,easy operation,flexible design,convenient debugging,stable operation,high precision,and short software development cycle.Has a good practical and market effect,applicable and industrial non-destructive testing.