At the university of electronics and technology university, in the second grade of the university of computer science and technology, he has been a little busy lately. The fingerprint lock of the dormitory, made by his “certificate”, has attracted the attention of a number of students, even from other dormitory students, for practical reasons。
According to students, the fingerprint lock was developed by stm32 circuit boards and consisted of four parts of stm32 master board, fingerprint identification module, step-by-step machine and oled screen. Fingerprint recognition module, step-by-step machine, oled screens, respectively, were inserted at the appropriate position on the circuit board and powered with a chargeable 5v voltage, and the fingerprint lock began work。
Zhong won-shin demonstrated the operation of the fingerprint lock - first press the power button of the circuit board, and then the system begins to start. The k5 key on the board then entered the fingerprint identification module and the oled screen was followed by the put your finger command, at which point fingerprint information could be verified on the fingerprint identifier。
Zhong won-shin's roommate's fingerprints were taken and numbered in advance, with different numbers corresponding to different names. If it is recorded in the fingerprint library and successfully identified, the fingerprint identifier returns a real value to the circuit board chip, which can direct the oled screen display。
“search securityly”. Depending on the number of the returned value, the old screen displays "welcome back+ roommate's name " . If fingerprint recognition is unsuccessful or the fingerprints were not previously recorded in the fingerprint library, the old screen displays “failed, try again”。
The fingerprints of his classmates were successfully identified, and with the sound of a drop, the walk-in machine began to turn, and the line was gradually shorter, as a result of the link between a string on the axle and the iron hand behind the door lock, and the hand was pulled to the left, and the door opened。
After the fingerprint locks had been put into effect, his roommate, prince zhou, who had often been locked outside the door for forgetting to bring the keys, claimed to be the “best beneficiary” of the small creation. The prince said, “at the end of the year, we sometimes study later in the study room. With this little invention, we don't have to worry about getting our roommate out of bed!"
It's in russia, it's on the day. Turning to the birth of the fingerprint locks, zhong yuan believed that the original idea was simply one of his own “sluggering”. “my roommate is very concerned about raising a child and has bought an electronic name in the dormitory to `monitor' his weight at all times. Just a few of our classmates in the small room, and the other roommates in the back room know about it and often come to our dorm and call it weight. My position is by the door, and every time i close the door, i write the program in half, and i interrupt because i open the door. I was wondering if i could make a fingerprint lock that would allow other small roommates to talk to us in our bedroom, while at the same time allowing us not to bother by opening doors frequently.”
With this idea, zhong won-shin began to conceptualize the design of the fingerprint lock and purchased relevant materials online. He used the extra-curricular hours to write the fingerprint locks and to assemble them with his roommates. In the process, zhong won-shin and his roommates also encountered a number of problems, and they defused them. They had to drill a small hole in the door, with specialized equipment, to the masters in charge of the maintenance of the dormitory, as a result of pressure, which often resulted in short circuits; in order to solve the problem of the `dubon line' being too short, after many matching and testing, they finally found suitable outsourced material to extend and seal the `dubon line'; after the first version of the program was written, they encountered the problem that the program could not be burned, and zhong won-shin students were subjected to constant debugging and eventually achieved better results. When the fingerprint lock was first in use, it was slow because of limited voltage, and in order to reduce resistance, zhong won-shin students put rubber bands behind the lock, making it easier to pull hands back and away. Throughout the process, zhong yuanjin students and roommates have been searching and improving, and this fingerprint lock is now a third generation product. Due to their usefulness and wide-ranging use, the fingerprint locks became part of their participation in this year's extra-curricular scientific competition for university students at the starfire cup。
Believe it or not. During this year and a half of the year in which western electricity is sought, zhong won-shin students feel deeply at the scientific atmosphere of western electricity, and the first course of " learning guidance " became the beginning of his scientific research and competitions, while he slowly transformed from a learner to a participant in various major competitions in schools and won a third prize in the first year of the acm international university program design competition. When it comes to homemade fingerprint locks, quintana says, "i love computer science, and the it industry can connect all walks of life, so that information can be shared and dead water turned into live water. College expertise education gives me theoretical nourishment, which is the basis for my exploration of the outside world. "theory's vitality lies in constant innovation," and our profession is also a very demanding one. For example, my fingerprint lock is simple: it's more time-consuming to make it, and many of my classmates don't want to do it, and i particularly like to say, "you do what you did in march and april, and september has a natural answer," and i believe that in normal times, we just work hard and time will give us the answer." zhao reilly, china business news
