After a lot of work, the graduation project is over. Inevitably, due to lack of experience, many areas were not fully considered. It would be unthinkable to complete the design without the guidance and guidance of the tutor and the joint efforts of the students.First of all, I'd like to thank my mentor, Mr. He fang. Mr. He fang was very busy on weekdays, but he fang provided me with careful guidance at every stage of the graduation project, from the internship to the consultation materials, to the determination and modification of the design draft, and to the regular inspection. In addition to appreciating Mr. He fang's professional level, her rigorous academic knowledge and scientific research spirit are also examples for me to learn from forever, and will have a positive impact on my future study and work.Then, I would also like to thank all the teachers in the university for laying a solid foundation of professional knowledge for me. At the same time, I would also like to thank all the students, thanks to their support and encouragement, the graduation project will be successfully completed.