Powered my fan: It turns out | 'Face recognition'

Every time in the hot summer, people always think of all kinds of tricks trying to cool themselves. All fans have seen, but they can realize the 'Face Tracker' smart fan, I guess you haven’t heard of it? A few days ago, at the Chinese Academy of Sciences At the Beijing Youth Science and Technology Innovation Contest hosted by the University Huairou Yanqi Lake Campus, three senior high school boys Wang Nan, Zou Wenze, and Li Zepeng from the High School Affiliated to China University of Geosciences, Beijing No. 101 Middle School, and the Capital Normal University Affiliated High School brought such a case. 'High-end' stuff. 'Our purpose is to make it track people's faces, so that people always bring 'closed' coolness.'

Face recognition fans have never come to the market

With the continuous improvement of people’s quality of life requirements, the intelligentization of furniture and appliances has become a mainstream trend. Since the introduction of electric fans, intelligence has also been continuously improved. From the beginning, only a fixed direction can be provided to automatically swing the head. , and then to the current remote control, frequency conversion mute and other functions have become a reality, but the current market, the fan automatically follow the function is rarely achieved.

Prior to the study of the interventional subjects, the three boys conducted a thorough investigation of the functions of the smart electric fans on the current market. According to them, Beijing Information Technology University had a team designed a single-chip microcomputer as a control unit and combined with embedded technology. Intelligent electric fan with temperature-controlled speed regulation, automatic tracking of human body position, intelligent start-stop, LCD display time and temperature. 'This fan power supply is stable, easy to operate and reliable, but it does not have to automatically follow the human face. In addition, some foreign scholars have designed a smart electric fan including a fan body, a power supply circuit, a control circuit, a biological infrared sensor, and a swing motor for swinging the fan body. 'This smart fan has multi-point detection. The advantage of this is that it can avoid misoperation. It can perform static inspection on the human body, but it does not have the function of face recognition.

Based on this market situation, a small team of three boys proposed an intelligent electric fan that can automatically follow the face, hoping to provide people with some convenience. 'It uses face recognition as a starting point and uses convolutional nerves. The network recognizes the human face and uses the steering gear to implement the automatic following function.

Three functions to achieve personalized service

According to the introduction of three boys, the smart electric fan developed by them has three major functions: First, it automatically recognizes the human face, and the fan's orientation changes with the person's position, ensuring that the wind always blows to the person; the second largest function is based on people. Near and far from the fan, the air volume is automatically adjusted, and the distance from the air is increased, the air volume is reduced when the air volume is near, the air volume of the guarantor is basically stable, and the third function is to leave the fan when the object is blown. Detection range, the fan will automatically shut down to achieve the purpose of energy saving and environmental protection.

The boys have preset some suitable scenes for this smart fan. The first is the gym, 'We are all fitness enthusiasts. In general, we don't have air conditioning in the gym, because we need fluid surface heat dissipation. However, the general electricity Fans do not have 'directivity' and it is difficult for everyone to achieve the purpose of cooling. 'At this time, this smart electric fan will be able to 'big show'. Next is in the public workshop, 'This space is generally present.' Industrial detritus or oil, if you use an undirected electric fan, is likely to cause environmental pollution. If the electric fan can catch workers' movements, 'chasing' the workers to blow heat, it will inevitably improve work efficiency. ' The third scenario is In public places or family environments where the crowd is more complex, 'both young and old, they have different abilities for wind capacity. Some people are not heat-resistant and are easily upset; some have weak human bodies. The wind blows and it's easy to catch a cold. At this time, this electric fan that can chase people's hair is used.'

Zou Wenze introduced the operating principle of this intelligent electric fan to reporters: Send the information captured by the camera to the vision board, run the face recognition program of the convolutional neural network algorithm on it, and feed the face information back to the microcontroller in real time. The decision-making rules are used to control the steering gear and motor to achieve related functions. 'The camera is the eye, used to capture the position and image; the microcontroller is like the brain used to make decisions, it passes instructions to the servos and motors; they are like limbs. , can follow the position of the human face.'

In the future will join the 'private order' service

In order to complete this project, three boys who had little basis in the MCU came to the laboratory of Beijing Institute of Technology to ask the teachers of the Automated Institute for advice. The teacher popularized a lot of electrical knowledge and the working principles of some of the components to be used. For example, the role of the microcontroller, the preparation of the code, the principle of the steering gear and so on.

After determining the theme of the project, each of them returned home and provided ideas for the fan's structure, function, and style. After unifying opinions and identifying the three main functions of the fan, everyone said it and worked.

"This project is simple and easy to say. It's difficult and difficult. It requires a lot of basic building and assembling operations as well as writing in the C++ language. It's also a good exercise opportunity." Wang Nan said that he hadn't had any contact with c++ before. 'I didn't expect programming to be bothersome. I used to have only had some simple programming, and I couldn't stand to jump to this height. ' They used their spare time to teach themselves and ask teachers, and slowly put people's faces under the visual processing framework. The identified program is settled.

After nearly half a year, this smart fan has finally been basically completed. According to their ideas, the future of this electric fan will be added to the face recognition function of specific individuals, 'according to different people accept the difference in the amount of wind, enter different users The physical parameters, personalization, and ensuring the accuracy and maximization of work efficiency. ' In addition, the human face is only the 'benchmark' of this fan recognition, in the future it can also set the amount of air and hair blow. 'It will be with the mobile phone End-to-end connections, users can set and adjust information autonomously, like 'private-custom' services.'