The system takes AT89S5 1 as the core component, adopts software programming, realizes password lock and alarm function through keyboard control and LCD display, and can prevent password from being tried many times, which can meet the basic requirements and play a part in this design topic. Try to make the hardware circuit simple and stable, reduce environmental interference such as electromagnetic interference, give full play to the advantages of software programming, and reduce errors caused by insufficient precision of components. The intelligent combination lock of this design scheme has the characteristics of low cost, reliable operation, multiple functions, intelligence and strong practicability, and can be applied to many occasions with intelligent and flexible control.

Due to the limitation of time and knowledge level, there are still some imperfections in this system, and some specific details need to be solved before it can be used as a practical application. For example: extended infrared detection technology, fingerprint recognition technology, voice recognition technology, image recognition technology and so on. Only in this way can we better meet the development of society and the needs of the people.

With the continuous development of computer science and sensing technology, we believe that in the near future, password locks and related technologies will mature and play a greater role in improving people's quality of life.

After two months of stumbling, my graduation project is finally coming to an end. Physical design has basically achieved the expected results, but due to the relationship between ability and time, there are always many unsatisfactory places, such as incomplete functions and rough appearance. But I can proudly say that every piece of code in it has my work. When you look at your own program, it is really great happiness and comfort that the system that you accompany all day can run healthily. I believe that the ups and downs will eventually turn into sweet springs.

Graduation design may be the last assignment I handed in in my college career. I want to take this opportunity to thank all the teachers and classmates who have been helping me. Your friendship is my wealth and an indispensable part of my life. My graduation advisor, Miss Wu Huifeng, has always been an elder, forgiving my ignorance and impulsiveness and giving me tireless guidance. Here, I want to say thank you to her.

The experience of writing this paper will also benefit me for life. I feel that writing a paper is something I really want to do. It is a real process of self-study and research. Without learning, I can't have the ability to learn. You can't make a breakthrough without your own research, so it's not called a thesis. I hope this experience can inspire me to continue to make progress in my future study.