Smart home based on IoT wireless sensing

With the support of modern technology and “big data” thinking, “smart city” is more and more people are aware of, but also the traditional city management and city operations to reconstruct, and gradually realize the transformation from digital to intelligent, along with the IoT application technology With the maturity of IoT application technology, a series of products have been produced: smart campus, smart home.

With the proposed 5G and AI technology, the domestic smart home has been more fully developed, and from IDC data analysis, the smart home market size is expected to grow to about 1.7 trillion RMB by 2022. Under the wave of consumer IoT, smart home has become one of the most promising market segments. Nowadays, building an ecological platform with multiple scenes, multiple entrances and multiple applications has become a strategic direction for several electronic industries, where multiple scenes not only refer to common home scenes such as living room, kitchen and bedroom, but also include buildings, cars, restaurants and hotels. Multi-entry refers to the WeChat small program and related APP and other entrances to itself; all kinds of cell phone partners entrance, such as: vivo, huawei, oppo, etc. and Baidu Xiaodu, Tmall Genie and other audio entrance. Multi-application refers to the smart home ecosystem will develop more content and value-added services such as life consumption, health, entertainment, social and so on, in addition to controlling the operation status of home appliances. Today, smart home is developing interconnected intelligence and trying to approach the smart home.

1、Technology support

The three core components of the technology key of smart home are: Internet of Things (IoT), artificial intelligence and cloud computing [1].

Internet of Things (IoT): connects objects to the network through sensors, and realizes management and operation after data and information processing such as cloud computing, and finally realizes the connection between things and things and people and things. IoT can be roughly divided into four levels, which are perception layer, network layer, platform layer and application layer.

Artificial Intelligence: Simulation through algorithms enables computers to simulate human brain for voice and face recognition. The empowerment of artificial intelligence for smart home mainly lies in two aspects of perception and processing. The face recognition and voice recognition technologies of artificial intelligence add active perception capabilities at the visual and auditory levels to the smart home, providing more ways of interaction.

Cloud computing: resources are shared in the cloud, and users can obtain resources through network connection. The way of obtaining resources through cloud computing reduces the requirements for users’ server software and hardware, and is not restricted by geography, time and equipment.

2、The development of smart home

The development of smart home has transitioned from the early product-centered single product intelligence stage to the scene-centered interconnection only stage, which connects each smart single product through the Internet of Things to form a more unified intelligent system and realize the scene-centered smart home. Currently, the smart home is evolving to the user-centered smart home stage, whose expected effect is to realize the user-centered intelligent and personalized home through combining with big data analysis. user-centered intelligent and personalized operation. The “smart home” brings users a more comfortable living environment that can be adjusted precisely to their preferences, while reducing energy and use and waste, without the need for old-fashioned user controllers [2].

3.Characteristics of smart homes

3.1 Control methods of smart homes

The control methods of smart home commonly used today include intelligent voice control, intelligent panel control, and cell phone APP control, which can be controlled according to the needs in different environments through different methods [3].

1) For voice control, take the Tmall Genie voice control process as an example, the voice command is obtained through the Tmall Genie, the user is connected to the merchant through the cloud-to-cloud solution, and the implementation of the user command is realized through the analysis of the corresponding sensors to achieve the intelligence of voice [3].

2) Intelligent panel control

Smart control panel is a collection of smart switches through flat operation to achieve control of furniture, usually the smart panel will be installed at the switch, today’s smart screen, not only can control smart devices, but also food procurement and understanding the news, etc. Smart control panel combines smart devices and control panels to make them more spatially specific and persuasive, in some ways, changing people’s The smart control panel combines smart devices and control panels, making them more spatial and persuasive, and in some ways, changing people’s lifestyle and ensuring the balance of food meals.

3)Mobile APP control

When we are in the field and cannot control the indoor furniture by voice or panel, what should we do? We can realize the intelligent regulation of furniture through cell phone APP, and the intelligent regulation of cell phone remote control commonly used in daily life for the control of TV or air conditioner [4].

3.2 Intelligent experience of single product and scene interaction in parallel

In different scenes, the requirements of each element in the environment are different, such as: air humidity, room temperature, light intensity, etc. Thus, combined with the smart furniture APP, a variety of new modes have been studied to improve the quality of life, such as: “automatic mode” and “scene mode “. Automatic mode is a mode that executes a series of commands from by a certain behavior or command as a touch point [5]. Among them, the “away from home mode” can be used as a touch point through the closing of the user’s door, through this touch point to achieve the closure of indoor lighting, electric gate, thus reducing or avoiding the waste of resources. The “scene mode” is to operate various devices in the environment through the determination of a scene, in order to achieve an atmosphere close to the pre-selected scene, this mode is very similar to the selection of the scene mode when listening to songs, for example, “movie mode”, will be the environment in which the lighting This mode is very similar to the selection of scene mode when listening to songs, such as “movie mode”, which will adjust the lighting, indoor temperature and other elements of the environment.

4、Status of smart home

In March 2019, Huawei released a full-scene wisdom strategy, and “scene” became the focus of Huawei’s strategic deployment. In the scene era, “scene” has become a new experience unit, and the ability to provide users with the corresponding experience in a specific scene is the embodiment of intelligence [6]. Through intelligent operation, the humanized characteristics of the machine are realized and more vivid and flexible changes are made.

The smart home is not only a device, but also a system concept, and overall it is a system management platform to realize the simultaneous control of multi-system software, thus making the product more intelligent and standardized. The current smart home covers a wide range of machines, which can be divided into environmental air, kitchen products, audio-visual entertainment, bathroom products, security monitoring, control connection, etc., as shown in the figure below.

At the China Household Electrical and Consumer Electronics Fair in Shanghai in 2021, there were many smart home “black technologies” to achieve quality life. As seen in Haier’s smart kitchen, the refrigerator hears the consumer’s voice command and passes the command to the connected oven or rice cooker, which puts the ingredients in without any operation, and the consumer can sit and wait for the delicious food to come out [7]. In the checkroom of the bedroom, there is also a manifestation of “intelligence”, where the dresser stands in front of an intelligent apparatus, gets a photo of the body type, and by recognizing the body type and integrating factors such as season, occasion and temperature of the day, the dresser matches the dress. At the same time, by analyzing the identifier’s body fat and body shape, health data can also be obtained so that users can understand their own health. In addition, the smart home supports the operation status control of appliances including washing machines, TVs, air conditioners, etc. For example, the intelligent control of TVs enables simultaneous multi-party video sessions, which greatly improves office efficiency to a certain extent.

In addition, in order to better integrate intelligence into life and ensure quality of life, at the expo, 3M brought the Total Clean series air purifier, which is introduced as an air purifier with 3M’s unique patented electrostatic electret technology, equipped with a new five-in-one high-efficiency composite filter to optimize the efficient removal of bacteria and viruses and enhance the removal efficiency of gaseous pollutants (such as formaldehyde/TVOC). In addition, the machine is also equipped with solid-state pollutant laser sensors and high-precision gaseous pollutant sensors to effectively detect indoor air PM2.5, formaldehyde and TVOC content, and realize real-time data display and human-computer interaction experience, with remote intelligent monitoring and control functions.
It can be seen that home wisdom is not only limited to the operability of some furniture, but in the process of development, the smart home is more refined and health-oriented.

Based on all the scenes and life needs of users, smart home creates a boundless ecology by integrating various resource service providers to provide users with a seamless wisdom experience of the whole process, covering the whole scenario of clothing, food, housing, entertainment and transportation.

From “smart home” to “smart community” to “smart city” [8], it not only marks the progress of science and technology, but also improves people’s quality of life to a certain extent. The technology is integrated into life, which brings convenience to people’s life and enhances their happiness index.

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