Research And Design Of Advanced Low-temperature Plasma Device

As the continuous development of modern biomedical science and technology, it is geting more need of the low surgical trauma and safety requirements.The ideal surgical effect is to achieve the purpose of the operation with smallest amount of wounds and bleeding.That is needing higherlevel Standard of power-control technology in active medical electronic device.Biomedical Systems is the most difficult modeling and control system in the world,speaking of its complexity and technical difficulty. All biological systems are nonlinear systems.It is impossible to measure changing parameter or individual differences,neither to describe the mathematical model.This study designed a type of low-temperature plasma treatment device based on fuzzy-PID power controller. Verified by clinical analysis, the operative time, blood loss and length of incision of the low-temperature plasma surgery group is less than that of the ratio of frequency plasma surgery group(P<0.05);The incidence of postoperative complications of the low-temperature plasma surgery group is significantly lower than the ratio of frequency plasma surgery group(P<0.05). Conclusion: the low-temperature plasma treatment can significantly reduce blood loss and length of incision, shorten operative time, reduce postoperative complications in the general surgery. It is a safe and effective electrical surgical equipment.In the first chapter,it introduces the background,significance of the article,status of plasma disciplinary and the main work of this paper.In the second chapter, the controlled device is analyzed with the concept of medical low-temperature plasma.In the third chapter, the design programs of low-temperature plasma device have been demonstrated, then the key technology is determined.In the fourth chapter,fuzzy PID power control system is Simulated by Simulink and Fuzzy tool box.The hardware and the softwaresystem have been designed. The simulation results confirm that fuzzy PID power controller has less overshoot,better dynamic performance and shorter adjustment time.In the fifth chapter,clinical trials and statistics of low-temperature plasma device proof the actual effect of power control.In the last chapter,the author summarize the whole work of this paper and prospects for future work.