The global population ageing is a trend. China is about to enter a super-aging society. China is taking a highly profitable route in the care of the elderly. The number of private for-profit institutions is many times higher than public. The disadvantages include: expensive, over-received beds, quality problems, human exploitation leading to burnout, and more ward-style care that deviates from human dignity and interpersonal interaction.
In Asian countries, influenced by traditional ethics, most people want to live with their children, and the situation of younger ones leads to a heavier burden on young people. Children often need to face the shackles of daily life, urinary and lavatory, and spend a long time to kill their affection, causing emotional distress. However, the children are not worried about the elderly living alone, preferring to be sent to the support institutions. Therefore, even if scholars believe that "aging at home" is the best choice, but for the real compromise, the market demand for support institutions has been increasing.
Smart care family age is coming
In the face of the above dilemma, do we have a prescription for it? The advent of the era of smart care for the family may be the answer to the dilemma. In recent years, the world has invested a lot of manpower and resources to develop smart home related technologies. Smart home refers to the "home" as the center, combined with the surrounding related industries, to jointly promote smart home services, including home care, security monitoring, smart home appliances and home entertainment. In 2004, the United States promoted the intelligent structure development plan, actively researched and developed capital communication and monitoring technology in buildings, and accelerated the trend of the smart home market. So far, Japan’s technology is the most mature, and South Korea is also catching up.
Among them, “Smart Care Home†integrates medical care and technology to apply smart home to the field of care. In addition to solving the human burden of the care organization, the quality is not uniform, and the management is unreasonable, it also makes the occupants' life more convenient and more independent, and combines the emergency rescue system to ensure safety. Let the old man be more elegant and self-respecting and brave. A typical smart care home integrates the following five main items:
1. Sensor under the floor tile : measure the gait and weight of the occupant as a means of diagnosing disease and injury.
2. Camera embedded in the bathroom mirror : measure heartbeat, face changes, skin color to analyze health status and blood oxygen concentration data.
3. Smart home appliances : measure the physiological data through the wearable device, and automatically adjust the temperature and humidity of the most suitable occupants in combination with the home appliance.
4, connected sports equipment: including static bicycles, interactive Tai Chi training equipment, somatosensory monitoring for therapists to assess health status, can also be combined with the home rehabilitation system.
5, other measuring equipment : measuring whether the appropriate medication, sleep quality is good and bedtime is too long.
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Lamp panel
The lamp panel is divided into ordinary infrared lamps (Dingyuan and Guanglei) and array lamps. The array camera is also divided into 1W, 2W and 3W. Therefore, when choosing infrared lamps, if it is an ordinary infrared lamp, try to choose Dingyuan and 3W array lamps. Since the appearance of infrared lamps is generally invisible, some cottage cameras are filled with Guanglei and 1W array cameras are filled with 3W array cameras. Therefore, try to choose a large brand when choosing cameras.
Maximum Aperture
The real value of the maximum aperture is to improve the light intake under low light conditions, so as to achieve the best exposure combination. In general, the ability to visualize the lens is not required for shooting landscapes. In addition, the lens caliber is not required for shooting landscapes except in particularly dark places. However, when the 70-200mm zoom lens is equipped with a 2-fold zoom lens to make the telephoto section become 400mm and AF is used for automatic focusing, it is better to choose a lens with the largest aperture of F2.8. Large aperture is conducive to accurate focusing in dark conditions. When shooting people with a large aperture lens, even in places where the light is weak, the handset can also use natural light to shoot. In addition, the lens with the largest aperture can bring fast shutter speed, so sports photography also needs a large aperture lens.
Another reason for requiring the lens aperture to be large is to be able to visualize the background freely and ensure the quality of visualization. When the aperture of the lens with the maximum aperture of F1.4 is reduced to F2, both the imaging quality and the blurring quality of the background are better than those of the lens with the maximum aperture of F2. Therefore, it is of great value to reduce the aperture of a large aperture lens by one stop. Any photographer should be good at using the lens.
focal length
The first thing to pay attention to when selecting a lens is the focal length of the lens. In fact, focal length is a matter of perspective. Different focal lengths and perspectives are different. In addition, users should be clear about what is the main purpose of buying lenses? Is it for scenery or people. As we all know, it is better to use a wide-angle lens when shooting landscapes, and a telescopic lens when shooting people. Therefore, you should first decide the focal length of the lens you want to buy according to the purpose of photography.
The best focal sections for shooting scenery are 24 mm wide angle focal section and 200 mm telescopic focal section (both are based on 35 mm specifications, the same below). When the wide-angle focus segment of the standard zoom lens evolves from 28mm to 24mm, the viewing angle becomes larger, and the range of scenery that can be stored is greatly expanded. Generally speaking, the maximum aperture of the lens is not required for shooting landscapes. If you are mainly shooting landscapes, a wide angle focal length of 24mm is basically enough when you select a zoom lens. As for the telephoto section, it must be at least 200mm. If the telephoto section is 300mm or 400mm, it is more ideal, and the degree of freedom will be greatly improved. The telephoto focus segment of traditional zoom lens is 300 mm, which is 450 mm for digital SLR. The focal length has been expanded by 1.5 times, which makes it more enjoyable to use. This is the value of digital SLR. The wide-angle focal section of the digital special ultra wide-angle lens produced is generally 12mm, equivalent to 18mm of 35mm, which is nearly 1.5 times larger than the 28mm focal section of 35mm, thus greatly widening the left and right range of the scenic scene.
The best focal length for shooting people is 85mm. In terms of 35mm standard, 85mm focal length is basically used as the standard for shooting characters. The portrait taken by the 85mm focal section is basically close to the picture effect taken by the medium frame camera. It is not only suitable for the distance, but also the face of the person looks very natural. The distance between the camera and the person being photographed can basically be kept at the normal speaking distance. The 85mm focal length can also effectively blur the background and prominent characters. In order to obtain good visualization effect, the lens with the largest aperture should be selected. The 85mm focal length is about 135mm on the digital SLR. Although the sense of distance of the shot is a little weak, it is basically OK, so the focal length of the person lens should be at least about 85mm.
A 100mm macro lens is enough for traditional SLR to shoot flowers. The 100mm macro lens can be used for equal magnification photography, which can make the flowers very large. However, when taking equal magnification photography or near equal magnification photography, due to the depth of the long focus scene, it is easy to shake, so anti shake measures should be considered when taking photos. From this point of view, 50mm macro lens is easier to use on digital SLR.
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