Since the 1960s, developed countries such as Europe and the United States have stepped into an aging society. China has also entered an aging society at the end of the 20th century, and the aging trend has further intensified. Foreign research on barrier-free facilities for the elderly has reached a certain level, for example, Japan, Europe and the United States. The toilets produced by Toto Corporation of Japan have self-cleaning functions for the elderly, and the research on related products of the elderly in the United States mainly focuses on the study of the elderly living environment and the design of indoor facilities for the elderly. However, the research on the elderly facilities in China is in the initial stage. Most of the facilities are designed mainly for young people. The facilities for the elderly do not consider the functional size changes caused by the decline of physiological functions. For example, the height of male elderly people is about 2.5% to 3.0% lower than that of young people. The height of female elderly people is 2.5% shorter than that of young people, and some even reach 6%. The range of joint activities of the elderly people varies with age. Reduced; incompetence of legs and feet caused by physical decline; decreased vision caused by the elderly to see things ambiguous and other factors. Faced with the concentration of population, the further intensification of urbanization, the miniaturization of families and the increasing number of empty nesters, the conditions and safety of the elderly need to be further improved and improved. The development and improvement of facilities and equipment related to the elderly It is imminent.
1 Analysis of the status quo of the elderly
At present, our country mainly focuses on the mode of home-based care, which mainly includes empty nesters, couples living together, and residents living with their children. The empty nest elderly are poorly psychological, and most of them are cohabiting couples, and they have greater economic pressure to live with their children. Couples are more ideal. The elderly as a large part of society has become an indisputable fact. With the increase of age, the physiological function gradually declines, the functional size of the human body is reduced to different extents, the bones and joints are aging, the movement is inconvenient, the visual acuity generally declines, and the elderly are more or less loneliness and lack of safety after retirement. The sense of self-esteem is also very strong. Older people have a sense of loneliness and abandonment after they retreat from the second line of work. Due to frequent lack of communication, they may even develop diseases such as depression.
2 Analysis of the status quo of smart cat eyes
The investigation and study of the access control system in the existing household environment found that there are many problems in the access control of elderly houses in China. From the perspective of safety, since security issues sometimes occur, the design of the security door cat eye is of great significance to the safety of the elderly at home. From the ergonomic point of view, on the one hand, the current setting of the height of the cat's eye of the security door is based on the size of the normal middle-aged human body, and does not take into account the reduction in the functional size of the elderly due to functional decline; The eye of the cat's eye is too small for the elderly to use, which is very inconvenient, as shown in Figure 1. From the physiological point of view of the elderly, the loss of vision caused by the deterioration of the physiological functions of the elderly leads to blurring of the outside through the cat's eye. The current access control system must allow the elderly to go to the door to see the visitors and press the door, which brings a lot of inconvenience to the elderly.
figure 1
3 Application of smart bracelet in the elderly access control system
It can be seen from the above that there are many unreasonable aspects of the design of the elderly access control system. In response to these problems, the application of the smart bracelet in the elderly access control system is proposed. The use of the smart bracelet in the elderly access control system is achieved by combining the electronic cat eye outside the door, the screen fixed in the door and the smart bracelet worn on the old man. The electronic cat's eye is responsible for the input of information, and the indoor screen and the smart bracelet are the receiving ends of the information. The three closely cooperate to complete the communication of indoor and outdoor information. The smart bracelet allows the elderly to observe the scene outside the door anywhere in the room, helping the elderly to overcome the difficulties of easy forgetting, poor vision, and inconvenient movement.
3.1 audiovisual function
The biggest difference between a smart bracelet and a traditional access control system device is that it has a built-in projector device and forms a screen for human skin. The visitor touches the touch screen button on the electronic cat's eye, and the built-in motor of the wristband starts to vibrate. The information can be transmitted to the indoor screen device and the smart bracelet by ringing. The voice request can be sent in conjunction with the voice tube. After the voice request is sent, the voice request is released. When the touch screen is turned on, the information can also be transmitted to the indoor screen and the smart bracelet. At this time, the projector device inside the wristband is awakened and forms a screen on the surface of the human skin, and the old person completes the video communication with the outside visitors through the screen. The old man ends the video by tapping the touch screen screen in the center of the bracelet. The elderly can complete the communication with the visitors outside the door and control the access control at any corner of the room, avoiding unnecessary trouble and no fatigue.
3.2 Shooting and recording function
The electronic cat's eye, as shown in Figure 2, is equipped with a camera, a touch screen button and a voice call device, which is the information source of the entire system and is responsible for the input of information. The camera starts the automatic shooting and recording function when the guest stays at the door for more than 30 seconds. At this time, the picture is transmitted to the smart bracelet worn by the elderly by the wireless sensing technology, and the old person can observe and edit the picture by clicking the second touch screen button, the picture can be automatically saved, and connected with the network client. Effectively reduce theft, theft and other acts. In the event of the theft, relevant information can be provided to assist in the investigation. At the same time, the photo can be saved in the visual screen inside the door. (The visual screen is the part that is installed on the door and connected to the electronic cat's eye outside the door. The overall appearance of the device is simple. Generous, using a 3.5-inch large screen, has changed the traditional electronic cat's eye hole is small, the inconvenience caused by the observation of the elderly; the screen height is 1450mm, the screen interface uses the form of buttons to facilitate the elderly to touch and manipulate, the elderly used to press the button The form of the button is more convenient for the elderly with visual impairment. The button is turned on and off at the bottom left of the screen, and the button is pressed to open the video when someone calls, and the video function is turned off after the video voice is completed. The lower button is used to adjust and control the size of the sound, and the brightness of the screen can be controlled and adjusted; the middle button is used to view the video recording and electronic photo recording of the most recent period, and the bottom is the voice call device. The visual screen is for the elderly. In terms of indoor use, it is more common and convenient to use (as shown in Figure 3).
figure 2
3.3 Positioning function
For most elderly people, getting out of the way often happens. If the elderly go out of their way, they can touch the third touch screen. At this time, the smart bracelet turns on the display and starts the GPS positioning system. The smart bracelet passes the positioning system and feedback information. The way to guide the specific direction and location of the elderly, the lost can also reach the destination by interacting with the server by inputting voice.
3.4 Alarm function
If the visitor has more than 5 minutes in the visible range of the cat's eye outside the door, the camera will automatically input the information. The smart bracelet worn by the old man will ring with a strong vibration, so that the elderly can easily identify the visitor. Connect the smart bracelet alarm system to friends and relatives and network clients to increase the safety factor.
3.5 Other functions
If there are bad guys and gangsters, the wearer can send a distress signal to the surrounding relatives, friends or related departments through the GPS positioning system, or directly call the relevant unit for help, greatly improving the safety factor of the empty nest elderly in the apartment. This smart bracelet can also record various activities in the daily life of the elderly, such as the elderly's sleep time, physical condition, eating time, exercise time, etc. and can record it and transmit it to nearby nursing homes or hospitals by data. Telemedicine terminal. This raises the attention of the hospital or family members to the elderly, keeps abreast of the physical condition of the elderly, and reduces accidents caused by accidents such as sudden illness in empty nesters. The bracelet has a built-in lithium battery, and the vibration motor is very practical, and the simple but not simple design style plays a very good decorative role. The development of modern science and technology has given us unlimited possibilities. The Internet has played an irreplaceable role in modern life. This product takes the elderly as the core and adopts the universal design concept to connect environmental facilities and equipment with computers, Weibo and other clients. A unified system to achieve a people-oriented design philosophy. Effectively protect the personal safety of the elderly, and through analysis and a systematic and theoretical design method. As shown in Figure 4.
Figure 4
Conclusion
Caring for the elderly is caring for our future. The soundness of the design of the elderly indoor facilities reflects the level of our living standards to a certain extent and is the embodiment of our country's comprehensive strength. The use of smart bracelets in the elderly access control system, with the elderly as the main target group, with the popularity of intelligent configuration and big data become the norm, the role of wearable devices in the elderly life is more and more significant. The data shows that the degree of aging in China is increasing, and the equipment supporting the elderly is receiving much attention. The global market sold 14 million high-tech wearable devices in 2011. It is expected that by 2017, the world will sell nearby. 70 million smart wearable gear. This also makes wearable smart devices become the next battleground for e-commerce companies. This is also the significance of this study.
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