# Interior Design of Aging Housing Based on Smart Home System of IOT Sensor

Authors: Xiao Dong Cui; Wonjun Chung
Journal: Journal of Sensors
 (2023)

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## Abstract

In order to provide more comfortable living space for the elderly, this paper proposes an interior design method of aging housing based on intelligent home system of Internet of things sensors. Taking the residential area as the background environment, create the living space and environment for the elderly through intelligent means. There is a close relationship between the intelligent system in the room and the management center of the residential area and other users in the residential area. Firstly, through the theoretical research on the concepts of home-based elderly care and intelligent elderly care, the development process of intelligent elderly care is described. Finally, in the “people-oriented” concept, summarize and analyze the design methods of intelligent elderly care housing. The application results show that the interior form of the residence, the entrance of the lobby, the bedroom, and the kitchen should be designed for aging and intellectualization, respectively. For example, the clear width of the main passage of the bedroom should be greater than 900 mm, and its direction should be to the long side leading to the bed. The layout of furniture should consider leaving1500∗1500mm wheelchair rotation space to facilitate the activities of the elderly. Conclusion. This method can meet the physiological and psychological needs of the elderly.


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## Body

## 1. Introduction

In order to cope with the current severe aging situation, the report of the 19th national congress in 2017 put forward the initiative of “building a policy system and social environment for the elderly, filial piety and respect for the elderly, promoting the combination of medical care and elderly care, and accelerating the development of aging undertakings and industries,” which provides action guidelines for the issue of population aging at the national level [1]. The central urban work conference held in 2015 pointed out that “we will orderly promote the comprehensive renovation of old residential quarters, strive to basically complete the renovation of dilapidated buildings, shanty towns, and villages in the city by 2020, and finally build a harmonious, livable, dynamic, and distinctive modern city.” The government has listed the renovation of old residential quarters in urban construction as the construction focus. It can be seen that the aging transformation of residential buildings has become one of the key issues of urban construction of the government [2]. The traditional culture of filial piety first is deeply rooted in the hearts of Chinese people. Most people tend to live at home for the elderly after they grow old. Home care is also the basis for the construction of the elderly care service system in the 13th five-year plan. In 2017, the 13th five-year plan for the development of China’s aging cause put forward the construction requirements at this stage, which improved the elderly care service system of “home-based, community-based, institutional, and medical support,” and created a social environment to support the development of the aging cause and the construction of the elderly care system by providing significantly improved quality, more reasonable structure, multilevel, and diversified elderly care services [3]. Among them, the special project to promote the livable construction of the elderly is emphasized. It is required to promote the barrier free construction and transformation of facilities and create a safe, green, and convenient living environment. It is expected that by 2020, 60% of urban residential areas will meet the construction requirements, 40% of rural areas will meet the construction requirements, and the daily life of the vast majority of the elderly can be carried out normally relying on the community. In response to various pension policies issued by the central government and the “13th five-year plan,” various regions have carried out special planning for pension facilities, which not only carries out targeted overall planning from the urban scale but also successively issued policies for their living space/residential buildings to carry out targeted transformation from the aspect of adaptation to the elderly, in order to create a more suitable livable space for the elderly (as shown in Figure 1).Figure 1
Scenario design of smart home aging housing based on IOT sensor network.


## 2. Literature Review

Hu et al. analyzed the light environment of the elderly when they lived and specifically studied the lighting design method in the living space of the elderly from the vision and other factors of the elderly [4]. Cox et al. made a detailed analysis on the building components, spatial scale, functional configuration in the space, common furniture and facilities in the space and the environment in the space for the elderly, put forward the interior design principles, and conducted a detailed study on the apartment for the elderly and the two generation living mode [5]. Losanno et al. mainly investigated the elderly care facilities at that time, conducted targeted research and analysis on the policies and systems at that time and the population base of the elderly, paid attention to the physical and mental conditions of the elderly, put forward a new “elderly care” model, and discussed the indoor and outdoor environment suitable for the lives of the elderly [6]. Hamada et al. summarized the design points of the main entrance space function form, furniture and facilities elements and environmental feeling through the results of investigation and information feedback on the use of the elderly, and took this as the theoretical basis for the project practice [7]. Li et al. have studied the case, design, development strategy, and other contents of elderly care facilities in Japan, thus providing a real reference for the planning, construction and operation development of elderly care facilities, and making up for some deficiencies in aging design [8]. Gong et al. tentatively put forward the landscape design strategy for the external environment of the elderly, summarized some existing problems in the landscape space, and gave the key points of landscape design with the function of health care [9]. Yi et al. drew lessons from and summarized the public space of foreign nursing homes and explored relevant issues [10]. The key points of design are given from the aspects of furniture facilities configuration and functional form in public space, and the design method is summarized from the space environment. Mamom mainly studied the aging problem of the main functional spaces in the elderly living environment and elderly care facilities and put forward the adaptive transformation design strategy [11].From the professional perspective of architectural design, combined with environmental psychology, environmental behavior, gerontology, marketing, computer science, and other related knowledge, through the research on the trend of social aging, national policies, and the aging market, this paper puts forward many problems about the elderly care. Through the case study, this paper makes a comprehensive analysis on the aging housing. After understanding the living characteristics of the elderly in many aspects, we should ensure that in addition to the barrier free measures that must be ensured in the design, we should combine modern intelligent technology to seek corresponding countermeasures and reasonable solutions to the problem of how to meet the special physiological and psychological needs of the elderly through high technology. This paper mainly focuses on the helping and caring elderly among the elderly.


## 3. Research Methods

### 3.1. Concept of Intelligent Home-Based Elderly Care Mode

“Smart home care,” namely, “smart elderly care”, was first proposed by the British life trust foundation and is collectively referred to as “fully intelligent elderly care system.” Intelligent home care system is based on the Internet of Things technology, which embeds intelligent chips in home devices in the house, so as to realize the remote monitoring of the life safety of the elderly. Its core idea is to apply advanced electronic information technology and management concepts, such as sensor network, cloud computing, 3G mobile communication, web services, intelligent data processing, and other related IT technology means, so as to make the government, medical community, and community cooperate closely to provide medical care, travel safety monitoring, entertainment, and other services for the daily life of the elderly. In some cities in China, such as Beijing and Yangzhou, intelligent home-based elderly care has gradually become an inevitable development trend [12].In order to overcome the impact of the dynamic changes of the network on the transmission of various smart home sensors, the network QoS monitoring technology is introduced to lay a good foundation for intelligent transmission control with real-time monitoring. Add a timestamp at the protocol layer to monitor the network delay, add two fields to each message, and record the last received timestamp (LRT) and the currently sent timestamp (CST) [13]. After receiving the message, the receiving end calculates the local packet delay according to the LRT and SCT of the message. At the same time, the processing delay of the message in the network can be obtained by subtracting the processing delay of the opposite end according to the last time stamp (LST) saved by the receiving end and the time when the message is currently received.When endB replies A message,
(1)LRT=TB+∆t1,(2)CST=TB+∆t1+∆t2.When endA receives the message from end B, its local
(3)LRT=TA+∆t1.And its current time is(4)CT=TA+∆t1+∆t2+∆t3.At this time, it can be calculated that the bidirectional delay of message sending is(5)CT−LST−CST−LRT.


### 3.2. Development of Intelligent Elderly Care

The national intelligent elderly care experimental base is an intelligent elderly care demonstration project based on intelligent technology and equipment integration system and the advantages of Internet of Things and cloud computing [14]. Big data and spatial geographic information management integration is based on the principles of “fit for the old, adapt to local conditions, low-carbon environmental protection, and intelligent efficiency.” The project adheres to the policy of “government support, society participation, market-oriented, standardized construction, scientific management, and group development” and takes “platform construction, team construction, channel construction, and brand construction” as the development strategy. Through practice and exploration, the following three modes of intelligent elderly care experimental bases have been preliminarily formed (see Table 1).Table 1
Mode analysis of intelligent elderly care experimental base.
Base modeFormal contentComprehensive intelligent elderly communityNewly built intelligent residential buildings, apartments, and nursing homes for the elderly, as well as intelligent health management, life services, culture, and entertainment facilitiesIntelligent elderly livable communityWith the existing urban communities as the carrier, build an intelligent elderly care service platform to provide intelligent elderly care services for families, community service facilities, and community elderly service institutionsIntelligent aging service organizationPromote and apply intelligent technology and equipment in nursing homes, universities for the elderly, elderly activity centers and other institutions, train relevant family members, and establish an intelligent service networkThe ministry of housing and urban rural development will designate a city as a pilot city for the construction of a national smart city. According to the deployment of the scheme, the smart elderly care comprehensive service platform, which is supported by the government and participated by many enterprises, is launched. The base has successfully explored a new mode of providing for the aged with a new idea of development driven by demonstration. It is realized by adopting IT technologies such as big data, Internet of Things, and mobile Internet. The base simultaneously uses five platforms to pay attention to the daily life of the elderly, and all data are finally transmitted to the children and communities of the elderly through a comprehensive platform (see Figure2).Figure 2
Smart community platform.Academic circles have also made in-depth research and discussion on the basic theoretical issues of smart cities. The basic characteristics of smart cities can be summarized into the following four aspects (see Table2).Table 2
Basic characteristics of smart city.
Basic featureContent descriptionComprehensive IOTUsing intelligent sensor equipment to realize the networking of all public facilities in the cityFully integratedInternet of Things system and Internet system are fully connected and integratedEncourage innovationOn the basis of smart infrastructure, the government and relevant enterprises carry out innovative applications in technology and businessCollaborative operationEach key system of the city operates efficiently and harmoniously with its participantsIt can be seen that the practice of the actual work department in creating smart communities and smart cities and the academic discussion on the basic theoretical issues of smart cities, not only involve the theoretical and practical issues of intelligent elderly care, but also provide guidance for the innovation and development of intelligent elderly care.


## 3.1. Concept of Intelligent Home-Based Elderly Care Mode

“Smart home care,” namely, “smart elderly care”, was first proposed by the British life trust foundation and is collectively referred to as “fully intelligent elderly care system.” Intelligent home care system is based on the Internet of Things technology, which embeds intelligent chips in home devices in the house, so as to realize the remote monitoring of the life safety of the elderly. Its core idea is to apply advanced electronic information technology and management concepts, such as sensor network, cloud computing, 3G mobile communication, web services, intelligent data processing, and other related IT technology means, so as to make the government, medical community, and community cooperate closely to provide medical care, travel safety monitoring, entertainment, and other services for the daily life of the elderly. In some cities in China, such as Beijing and Yangzhou, intelligent home-based elderly care has gradually become an inevitable development trend [12].In order to overcome the impact of the dynamic changes of the network on the transmission of various smart home sensors, the network QoS monitoring technology is introduced to lay a good foundation for intelligent transmission control with real-time monitoring. Add a timestamp at the protocol layer to monitor the network delay, add two fields to each message, and record the last received timestamp (LRT) and the currently sent timestamp (CST) [13]. After receiving the message, the receiving end calculates the local packet delay according to the LRT and SCT of the message. At the same time, the processing delay of the message in the network can be obtained by subtracting the processing delay of the opposite end according to the last time stamp (LST) saved by the receiving end and the time when the message is currently received.When endB replies A message,
(1)LRT=TB+∆t1,(2)CST=TB+∆t1+∆t2.When endA receives the message from end B, its local
(3)LRT=TA+∆t1.And its current time is(4)CT=TA+∆t1+∆t2+∆t3.At this time, it can be calculated that the bidirectional delay of message sending is(5)CT−LST−CST−LRT.


## 3.2. Development of Intelligent Elderly Care

The national intelligent elderly care experimental base is an intelligent elderly care demonstration project based on intelligent technology and equipment integration system and the advantages of Internet of Things and cloud computing [14]. Big data and spatial geographic information management integration is based on the principles of “fit for the old, adapt to local conditions, low-carbon environmental protection, and intelligent efficiency.” The project adheres to the policy of “government support, society participation, market-oriented, standardized construction, scientific management, and group development” and takes “platform construction, team construction, channel construction, and brand construction” as the development strategy. Through practice and exploration, the following three modes of intelligent elderly care experimental bases have been preliminarily formed (see Table 1).Table 1
Mode analysis of intelligent elderly care experimental base.
Base modeFormal contentComprehensive intelligent elderly communityNewly built intelligent residential buildings, apartments, and nursing homes for the elderly, as well as intelligent health management, life services, culture, and entertainment facilitiesIntelligent elderly livable communityWith the existing urban communities as the carrier, build an intelligent elderly care service platform to provide intelligent elderly care services for families, community service facilities, and community elderly service institutionsIntelligent aging service organizationPromote and apply intelligent technology and equipment in nursing homes, universities for the elderly, elderly activity centers and other institutions, train relevant family members, and establish an intelligent service networkThe ministry of housing and urban rural development will designate a city as a pilot city for the construction of a national smart city. According to the deployment of the scheme, the smart elderly care comprehensive service platform, which is supported by the government and participated by many enterprises, is launched. The base has successfully explored a new mode of providing for the aged with a new idea of development driven by demonstration. It is realized by adopting IT technologies such as big data, Internet of Things, and mobile Internet. The base simultaneously uses five platforms to pay attention to the daily life of the elderly, and all data are finally transmitted to the children and communities of the elderly through a comprehensive platform (see Figure2).Figure 2
Smart community platform.Academic circles have also made in-depth research and discussion on the basic theoretical issues of smart cities. The basic characteristics of smart cities can be summarized into the following four aspects (see Table2).Table 2
Basic characteristics of smart city.
Basic featureContent descriptionComprehensive IOTUsing intelligent sensor equipment to realize the networking of all public facilities in the cityFully integratedInternet of Things system and Internet system are fully connected and integratedEncourage innovationOn the basis of smart infrastructure, the government and relevant enterprises carry out innovative applications in technology and businessCollaborative operationEach key system of the city operates efficiently and harmoniously with its participantsIt can be seen that the practice of the actual work department in creating smart communities and smart cities and the academic discussion on the basic theoretical issues of smart cities, not only involve the theoretical and practical issues of intelligent elderly care, but also provide guidance for the innovation and development of intelligent elderly care.


## 4. Result Analysis

### 4.1. Indoor Space Form

#### 4.1.1. Aging Design

Indoor space, according to different family structures, has different divisions of indoor space. Family population and family model elements are two basic conditions that affect family structure [15]. According to the degree of residence and separation between the elderly and their children, they can be divided into the following three types.(1) Sharing Type. According to the different degree of separation of the special space for the elderly in the residential apartment type, it can be divided into the following three categories, a total of six combinations of different planes (see Table 3 and Figure 3).Table 3
Spatial relationship between the elderly and their children.
Cohabitation spatial relationshipSeparate bedroom (separate bedrooms, shared by other spaces)Family shared toiletToilet for the elderlySeparate living room and bedroom (independent living room and bedroom, shared by other spaces)Shared toiletToilet separationSeparate main living space (independent living room, kitchen, dining room, and bedroom, shared by other spaces)Common in lobbyVestibule separationFigure 3
Proportion of CO habitation spatial relationship.(2) Neighborhood Type. There are mainly three forms of “living in different households on the same floor,” “living in different floors in the same building,” “living in different buildings in the same group,” and “living in different groups in the same area,” which not only facilitates the completely independent life of the two generations but also ensures the mutual care and emotional communication between the two generations in their daily life.(3) Split Type. Two generations of families are highly independent, but they are still in the same community, which is in line with the living trend of “separation, proximity, long-term contact, and response” in modern life. Most of the elderly live independently [16]. At the same time, there are potential safety problems, which make the elderly unable to receive timely care in terms of physical and mental health.


#### 4.1.2. Intelligent Design

Intellectualization will have a great impact on the division of indoor space forms. Nowadays, most rooms are divided by fixed walls with single function [17]. In the era of more and more intelligence, there are walls that can move and change, and spaces can be freely combined. With the development of science and technology, movable laminated glass, high-tech liquid crystal, or even invisible “virtual wall” may replace a single cement wall to divide the space, which will make the form of indoor space more colorful. With the application of intelligence, the division of residential indoor space will be more flexible and humanized. For example, more and more kitchen designs are changing from the corner of the house to the entrance of the house, connecting with the living room and dining room, or directly making an open kitchen. When the old man is alone at home, he cannot help feeling that the big room lacks a sense of security. At this time, intelligent applications come in handy. The old man can use the remote control to create a comfortable private space for himself on the movable wall of his home.


### 4.2. Entrance Hall

#### 4.2.1. Aging Design

The entrance hall is the first place for the host to meet the guests. It is the link between inside and outside. The design of the entrance can reflect the owner’s life taste and home design style. In addition to the required daily use safety, attention should also be paid to the portability of the elderly. It can be improved through the following specific aging measures:(1)
The passageways inside and outside the entrance hall shall meet the smooth passage of the local ambulance stretcher to avoid that the stretcher cannot be used due to the narrow passageway(2)
The inner side of the entrance hall should be reserved for the elderly to sit down and change shoes. Handrails and grab bars should be installed next to the seats


#### 4.2.2. Intelligent Design

The entrance design should be comfortable, convenient, and safe. In this position, the intelligent system includes night vision waterproof camera, visual intercom function, and fingerprint door lock. A waterproof color camera with night vision function is set at the gate to facilitate the children of the owner or the elderly to observe the images at the gate through the Internet or TV touch-screen anytime and anywhere, and the records are kept for 20 days [18]. Through the visual intercom function, the elderly can easily talk with visitors to open the door in the living room, bedroom, kitchen, and bathroom. In addition, they can also contact the monitoring center and even other residents in the community. Fingerprint door lock refers to the installation of household access control equipment at one side of the house door. Generally, there are visual doorbell and electric fingerprint door lock, which can visually talk with visitors or swipe cards, input passwords, and open doors by pressing fingerprints. A set of entrance protection doors and building door electronic doors are incorporated into the community security and emergency rescue system. Emergency call buttons are installed in public places in the community and in each room of the home, ensuring that the elderly can automatically unlock when there is an emergency and get help in time. It should be noted that the height design of fingerprint door lock and emergency button should meet the ergonomics of the elderly. In addition, we only need to install a touch-screen scene panel, which has been configured with the welcome and leave modes. When visitors arrive, the welcome scene will be turned on, and the lights will illuminate the whole living room, which is convenient for the elderly to operate, and will also reduce the loneliness of the elderly living alone at home.


### 4.3. Bedroom

#### 4.3.1. Aging Design

As the elderly get older, their activity ability gradually declines, and they will spend more time indoors. Since sufficient sunshine, fresh air, and beautiful outdoor landscape will play an important role in the physical and mental health of the elderly, the bedroom design should ensure the best lighting, ventilation, and landscape line of sight requirements [19]. The bedroom where the elderly live is best equipped with an auxiliary bathroom. Good aging design of bedroom is reflected in the following points:
(1)
The design of the bedroom should consider the psychological characteristics that the elderly do not like to rest in the same bed. Because the elderly sleep less, snoring at night will interfere with each other, so most elderly people have their own beds or sleep in different rooms. Therefore, when designing the bedroom area, two single beds should be reserved for the elderly to take care of themselves. It is very convenient to provide a bed for relatives to rest when the elderly care for them(2)
The elderly do not like to sleep in soft beds, because it is not easy to get up and turn over, and it is unhealthy. Therefore, when helping the elderly buy and select mattresses, they should pay attention. It is best to have a handle or handrail beside the bed to help the elderly get up(3)
The layout of beds, wardrobes, dressing tables, and other furniture should conform to the living habits of the elderly, especially to avoid dead corners of space, so as to prevent the elderly from feeling at a loss or causing unexpected injuries. The bed should not be too close to the window to avoid the direct blowing of cold wind(4)
The clear width of the main passage of the bedroom should be greater than 900 mm, and it should point to the long side leading to the bed. The layout of furniture should consider leaving1500∗1500mm wheelchair rotation space to facilitate the activities of the elderly(5)
The electrical control switch in the bedroom shall be set at the head of the bed for the elderly to facilitate operation


#### 4.3.2. Intelligent Design

(1) Emergency Call System. The bedroom is equipped with an infrared detector. If the elderly do not move for a long time, the emergency call system will send an alarm signal to the community management center and the building management station.(2) Profile. The intelligent control system often selects scene panel, background music panel, LCD TV, emergency button, single connected seesaw reset switch, etc. when configuring equipment. Common scene modes in the bedroom are as follows:Home mode: it is set as normal living lighting, and the air conditioner should be adjusted to the comfortable temperature of the elderly.Warm mode: the soft lights in the lamp pool will be turned on, and soft music will be played to create a warm atmosphere and romantic mood.Reading mode: the illumination of the bedside lighting should be suitable for reading, and the rest should be turned off [20].Theater mode: the curtains are automatically closed, and the lights are in place in one step, creating a visual and audio effect of being born in its environment.Night rising mode: the wall lamp is lit slowly, and the light in the corridor leading to the bathroom is also lit, which will not disturb the rest of friends and family. When they pass by again, the light will go out naturally.


### 4.4. Kitchen

#### 4.4.1. Aging Design

Standardized kitchen operation often brings inconvenience to the elderly. It is necessary to consider the arrangement order and position of kitchen utensils such as refrigerator, sink, stove, and storage cabinet in the cooking activities of the elderly. Considering that the elderly are relatively weak in terms of mobility and energy, the design should try to make the elderly shorten the time in the cooking process, make the operation steps smooth, simple, and convenient, and avoid wasting physical strength and overturning dishes and bowls.(1)
Appropriate area of the kitchen: after the kitchen is equipped with the console, the net width shall not be less than 1500 mm to ensure that there is enough turning space for the wheelchair elderly(2)
The plane layout of the kitchen: the layout form is relatively flexible. The common types are type I, II, L, H, and U. The L-shaped layout has a simple and clear operation flow line. It is reasonably arranged according to the sequence of food storage-sorting-cleaning-cutting-cooking-equipment, which is more suitable for the elderly [21](3)
Kitchen cabinets: the height from the bottom of the cabinet to the ground shall be 140~150 mm, and the height of the console shall be 750 mm. In order to facilitate the use of the elderly, the operating table with a width greater than 500 mm is more suitable, the clear height under the table should be greater than 600 mm, and the depth of the clearance under the table should be greater than 250 mm(4)
Pool part: the wheelchair needs to be inserted under the console, so the pool depth should be relatively reduced. The height of the pool table is usually as follows: the height of the knee of the person sitting in the wheelchair is 180 mm, of which the pool depth is 160 mm


#### 4.4.2. Intelligent Design

The modern integrated kitchen is more fashionable and humanized than the traditional kitchen. Due to the decline of memory of the elderly, sometimes they forget to turn off the gas when cooking, and often forget to turn off the light or it is inconvenient to turn off the light. Intelligent installation provides us with great convenience.(1)
The lighting design of the kitchen part is relatively simple, and the ordinary reset switch can be used. Connect the switch with the light control system to realize the control by the light system(2)
Install TV in the kitchen so that residents can watch TV and listen to FM while cooking. When visitors visit, the TV in the kitchen can also be used as a visual intercom(3)
Control the start and stop, wind speed, temperature, and mode of the kitchen air conditioner through the touch screen. If you forget to turn off the air conditioner, the elderly can turn off the air conditioner in the kitchen by pressing the “late night mode” before going to bed [22](4)
The elderly will inevitably forget to turn off the gas. The intelligent system will automatically cut off the gas valve and give an alarm when the CO concentration exceeds the standard. If the smoke concentration exceeds the standard, the alarm can be triggered. Finally, connect the lighting system with the alarm system. Once the alarm is given, the lights of the whole house will be bright to remind the residents more conveniently(5)
The highly intelligent kitchen can also monitor the residents’ diet and propose menus. After a dish is selected, the kitchen will search for its cooking methods through the Internet. The intelligent system can also be linked with the district supermarket to automatically order food


## 4.1. Indoor Space Form

### 4.1.1. Aging Design

Indoor space, according to different family structures, has different divisions of indoor space. Family population and family model elements are two basic conditions that affect family structure [15]. According to the degree of residence and separation between the elderly and their children, they can be divided into the following three types.(1) Sharing Type. According to the different degree of separation of the special space for the elderly in the residential apartment type, it can be divided into the following three categories, a total of six combinations of different planes (see Table 3 and Figure 3).Table 3
Spatial relationship between the elderly and their children.
Cohabitation spatial relationshipSeparate bedroom (separate bedrooms, shared by other spaces)Family shared toiletToilet for the elderlySeparate living room and bedroom (independent living room and bedroom, shared by other spaces)Shared toiletToilet separationSeparate main living space (independent living room, kitchen, dining room, and bedroom, shared by other spaces)Common in lobbyVestibule separationFigure 3
Proportion of CO habitation spatial relationship.(2) Neighborhood Type. There are mainly three forms of “living in different households on the same floor,” “living in different floors in the same building,” “living in different buildings in the same group,” and “living in different groups in the same area,” which not only facilitates the completely independent life of the two generations but also ensures the mutual care and emotional communication between the two generations in their daily life.(3) Split Type. Two generations of families are highly independent, but they are still in the same community, which is in line with the living trend of “separation, proximity, long-term contact, and response” in modern life. Most of the elderly live independently [16]. At the same time, there are potential safety problems, which make the elderly unable to receive timely care in terms of physical and mental health.


### 4.1.2. Intelligent Design

Intellectualization will have a great impact on the division of indoor space forms. Nowadays, most rooms are divided by fixed walls with single function [17]. In the era of more and more intelligence, there are walls that can move and change, and spaces can be freely combined. With the development of science and technology, movable laminated glass, high-tech liquid crystal, or even invisible “virtual wall” may replace a single cement wall to divide the space, which will make the form of indoor space more colorful. With the application of intelligence, the division of residential indoor space will be more flexible and humanized. For example, more and more kitchen designs are changing from the corner of the house to the entrance of the house, connecting with the living room and dining room, or directly making an open kitchen. When the old man is alone at home, he cannot help feeling that the big room lacks a sense of security. At this time, intelligent applications come in handy. The old man can use the remote control to create a comfortable private space for himself on the movable wall of his home.


## 4.1.1. Aging Design

Indoor space, according to different family structures, has different divisions of indoor space. Family population and family model elements are two basic conditions that affect family structure [15]. According to the degree of residence and separation between the elderly and their children, they can be divided into the following three types.(1) Sharing Type. According to the different degree of separation of the special space for the elderly in the residential apartment type, it can be divided into the following three categories, a total of six combinations of different planes (see Table 3 and Figure 3).Table 3
Spatial relationship between the elderly and their children.
Cohabitation spatial relationshipSeparate bedroom (separate bedrooms, shared by other spaces)Family shared toiletToilet for the elderlySeparate living room and bedroom (independent living room and bedroom, shared by other spaces)Shared toiletToilet separationSeparate main living space (independent living room, kitchen, dining room, and bedroom, shared by other spaces)Common in lobbyVestibule separationFigure 3
Proportion of CO habitation spatial relationship.(2) Neighborhood Type. There are mainly three forms of “living in different households on the same floor,” “living in different floors in the same building,” “living in different buildings in the same group,” and “living in different groups in the same area,” which not only facilitates the completely independent life of the two generations but also ensures the mutual care and emotional communication between the two generations in their daily life.(3) Split Type. Two generations of families are highly independent, but they are still in the same community, which is in line with the living trend of “separation, proximity, long-term contact, and response” in modern life. Most of the elderly live independently [16]. At the same time, there are potential safety problems, which make the elderly unable to receive timely care in terms of physical and mental health.


## 4.1.2. Intelligent Design

Intellectualization will have a great impact on the division of indoor space forms. Nowadays, most rooms are divided by fixed walls with single function [17]. In the era of more and more intelligence, there are walls that can move and change, and spaces can be freely combined. With the development of science and technology, movable laminated glass, high-tech liquid crystal, or even invisible “virtual wall” may replace a single cement wall to divide the space, which will make the form of indoor space more colorful. With the application of intelligence, the division of residential indoor space will be more flexible and humanized. For example, more and more kitchen designs are changing from the corner of the house to the entrance of the house, connecting with the living room and dining room, or directly making an open kitchen. When the old man is alone at home, he cannot help feeling that the big room lacks a sense of security. At this time, intelligent applications come in handy. The old man can use the remote control to create a comfortable private space for himself on the movable wall of his home.


## 4.2. Entrance Hall

### 4.2.1. Aging Design

The entrance hall is the first place for the host to meet the guests. It is the link between inside and outside. The design of the entrance can reflect the owner’s life taste and home design style. In addition to the required daily use safety, attention should also be paid to the portability of the elderly. It can be improved through the following specific aging measures:(1)
The passageways inside and outside the entrance hall shall meet the smooth passage of the local ambulance stretcher to avoid that the stretcher cannot be used due to the narrow passageway(2)
The inner side of the entrance hall should be reserved for the elderly to sit down and change shoes. Handrails and grab bars should be installed next to the seats


### 4.2.2. Intelligent Design

The entrance design should be comfortable, convenient, and safe. In this position, the intelligent system includes night vision waterproof camera, visual intercom function, and fingerprint door lock. A waterproof color camera with night vision function is set at the gate to facilitate the children of the owner or the elderly to observe the images at the gate through the Internet or TV touch-screen anytime and anywhere, and the records are kept for 20 days [18]. Through the visual intercom function, the elderly can easily talk with visitors to open the door in the living room, bedroom, kitchen, and bathroom. In addition, they can also contact the monitoring center and even other residents in the community. Fingerprint door lock refers to the installation of household access control equipment at one side of the house door. Generally, there are visual doorbell and electric fingerprint door lock, which can visually talk with visitors or swipe cards, input passwords, and open doors by pressing fingerprints. A set of entrance protection doors and building door electronic doors are incorporated into the community security and emergency rescue system. Emergency call buttons are installed in public places in the community and in each room of the home, ensuring that the elderly can automatically unlock when there is an emergency and get help in time. It should be noted that the height design of fingerprint door lock and emergency button should meet the ergonomics of the elderly. In addition, we only need to install a touch-screen scene panel, which has been configured with the welcome and leave modes. When visitors arrive, the welcome scene will be turned on, and the lights will illuminate the whole living room, which is convenient for the elderly to operate, and will also reduce the loneliness of the elderly living alone at home.


## 4.2.1. Aging Design

The entrance hall is the first place for the host to meet the guests. It is the link between inside and outside. The design of the entrance can reflect the owner’s life taste and home design style. In addition to the required daily use safety, attention should also be paid to the portability of the elderly. It can be improved through the following specific aging measures:(1)
The passageways inside and outside the entrance hall shall meet the smooth passage of the local ambulance stretcher to avoid that the stretcher cannot be used due to the narrow passageway(2)
The inner side of the entrance hall should be reserved for the elderly to sit down and change shoes. Handrails and grab bars should be installed next to the seats


## 4.2.2. Intelligent Design

The entrance design should be comfortable, convenient, and safe. In this position, the intelligent system includes night vision waterproof camera, visual intercom function, and fingerprint door lock. A waterproof color camera with night vision function is set at the gate to facilitate the children of the owner or the elderly to observe the images at the gate through the Internet or TV touch-screen anytime and anywhere, and the records are kept for 20 days [18]. Through the visual intercom function, the elderly can easily talk with visitors to open the door in the living room, bedroom, kitchen, and bathroom. In addition, they can also contact the monitoring center and even other residents in the community. Fingerprint door lock refers to the installation of household access control equipment at one side of the house door. Generally, there are visual doorbell and electric fingerprint door lock, which can visually talk with visitors or swipe cards, input passwords, and open doors by pressing fingerprints. A set of entrance protection doors and building door electronic doors are incorporated into the community security and emergency rescue system. Emergency call buttons are installed in public places in the community and in each room of the home, ensuring that the elderly can automatically unlock when there is an emergency and get help in time. It should be noted that the height design of fingerprint door lock and emergency button should meet the ergonomics of the elderly. In addition, we only need to install a touch-screen scene panel, which has been configured with the welcome and leave modes. When visitors arrive, the welcome scene will be turned on, and the lights will illuminate the whole living room, which is convenient for the elderly to operate, and will also reduce the loneliness of the elderly living alone at home.


## 4.3. Bedroom

### 4.3.1. Aging Design

As the elderly get older, their activity ability gradually declines, and they will spend more time indoors. Since sufficient sunshine, fresh air, and beautiful outdoor landscape will play an important role in the physical and mental health of the elderly, the bedroom design should ensure the best lighting, ventilation, and landscape line of sight requirements [19]. The bedroom where the elderly live is best equipped with an auxiliary bathroom. Good aging design of bedroom is reflected in the following points:
(1)
The design of the bedroom should consider the psychological characteristics that the elderly do not like to rest in the same bed. Because the elderly sleep less, snoring at night will interfere with each other, so most elderly people have their own beds or sleep in different rooms. Therefore, when designing the bedroom area, two single beds should be reserved for the elderly to take care of themselves. It is very convenient to provide a bed for relatives to rest when the elderly care for them(2)
The elderly do not like to sleep in soft beds, because it is not easy to get up and turn over, and it is unhealthy. Therefore, when helping the elderly buy and select mattresses, they should pay attention. It is best to have a handle or handrail beside the bed to help the elderly get up(3)
The layout of beds, wardrobes, dressing tables, and other furniture should conform to the living habits of the elderly, especially to avoid dead corners of space, so as to prevent the elderly from feeling at a loss or causing unexpected injuries. The bed should not be too close to the window to avoid the direct blowing of cold wind(4)
The clear width of the main passage of the bedroom should be greater than 900 mm, and it should point to the long side leading to the bed. The layout of furniture should consider leaving1500∗1500mm wheelchair rotation space to facilitate the activities of the elderly(5)
The electrical control switch in the bedroom shall be set at the head of the bed for the elderly to facilitate operation


### 4.3.2. Intelligent Design

(1) Emergency Call System. The bedroom is equipped with an infrared detector. If the elderly do not move for a long time, the emergency call system will send an alarm signal to the community management center and the building management station.(2) Profile. The intelligent control system often selects scene panel, background music panel, LCD TV, emergency button, single connected seesaw reset switch, etc. when configuring equipment. Common scene modes in the bedroom are as follows:Home mode: it is set as normal living lighting, and the air conditioner should be adjusted to the comfortable temperature of the elderly.Warm mode: the soft lights in the lamp pool will be turned on, and soft music will be played to create a warm atmosphere and romantic mood.Reading mode: the illumination of the bedside lighting should be suitable for reading, and the rest should be turned off [20].Theater mode: the curtains are automatically closed, and the lights are in place in one step, creating a visual and audio effect of being born in its environment.Night rising mode: the wall lamp is lit slowly, and the light in the corridor leading to the bathroom is also lit, which will not disturb the rest of friends and family. When they pass by again, the light will go out naturally.


## 4.3.1. Aging Design

As the elderly get older, their activity ability gradually declines, and they will spend more time indoors. Since sufficient sunshine, fresh air, and beautiful outdoor landscape will play an important role in the physical and mental health of the elderly, the bedroom design should ensure the best lighting, ventilation, and landscape line of sight requirements [19]. The bedroom where the elderly live is best equipped with an auxiliary bathroom. Good aging design of bedroom is reflected in the following points:
(1)
The design of the bedroom should consider the psychological characteristics that the elderly do not like to rest in the same bed. Because the elderly sleep less, snoring at night will interfere with each other, so most elderly people have their own beds or sleep in different rooms. Therefore, when designing the bedroom area, two single beds should be reserved for the elderly to take care of themselves. It is very convenient to provide a bed for relatives to rest when the elderly care for them(2)
The elderly do not like to sleep in soft beds, because it is not easy to get up and turn over, and it is unhealthy. Therefore, when helping the elderly buy and select mattresses, they should pay attention. It is best to have a handle or handrail beside the bed to help the elderly get up(3)
The layout of beds, wardrobes, dressing tables, and other furniture should conform to the living habits of the elderly, especially to avoid dead corners of space, so as to prevent the elderly from feeling at a loss or causing unexpected injuries. The bed should not be too close to the window to avoid the direct blowing of cold wind(4)
The clear width of the main passage of the bedroom should be greater than 900 mm, and it should point to the long side leading to the bed. The layout of furniture should consider leaving1500∗1500mm wheelchair rotation space to facilitate the activities of the elderly(5)
The electrical control switch in the bedroom shall be set at the head of the bed for the elderly to facilitate operation


## 4.3.2. Intelligent Design

(1) Emergency Call System. The bedroom is equipped with an infrared detector. If the elderly do not move for a long time, the emergency call system will send an alarm signal to the community management center and the building management station.(2) Profile. The intelligent control system often selects scene panel, background music panel, LCD TV, emergency button, single connected seesaw reset switch, etc. when configuring equipment. Common scene modes in the bedroom are as follows:Home mode: it is set as normal living lighting, and the air conditioner should be adjusted to the comfortable temperature of the elderly.Warm mode: the soft lights in the lamp pool will be turned on, and soft music will be played to create a warm atmosphere and romantic mood.Reading mode: the illumination of the bedside lighting should be suitable for reading, and the rest should be turned off [20].Theater mode: the curtains are automatically closed, and the lights are in place in one step, creating a visual and audio effect of being born in its environment.Night rising mode: the wall lamp is lit slowly, and the light in the corridor leading to the bathroom is also lit, which will not disturb the rest of friends and family. When they pass by again, the light will go out naturally.


## 4.4. Kitchen

### 4.4.1. Aging Design

Standardized kitchen operation often brings inconvenience to the elderly. It is necessary to consider the arrangement order and position of kitchen utensils such as refrigerator, sink, stove, and storage cabinet in the cooking activities of the elderly. Considering that the elderly are relatively weak in terms of mobility and energy, the design should try to make the elderly shorten the time in the cooking process, make the operation steps smooth, simple, and convenient, and avoid wasting physical strength and overturning dishes and bowls.(1)
Appropriate area of the kitchen: after the kitchen is equipped with the console, the net width shall not be less than 1500 mm to ensure that there is enough turning space for the wheelchair elderly(2)
The plane layout of the kitchen: the layout form is relatively flexible. The common types are type I, II, L, H, and U. The L-shaped layout has a simple and clear operation flow line. It is reasonably arranged according to the sequence of food storage-sorting-cleaning-cutting-cooking-equipment, which is more suitable for the elderly [21](3)
Kitchen cabinets: the height from the bottom of the cabinet to the ground shall be 140~150 mm, and the height of the console shall be 750 mm. In order to facilitate the use of the elderly, the operating table with a width greater than 500 mm is more suitable, the clear height under the table should be greater than 600 mm, and the depth of the clearance under the table should be greater than 250 mm(4)
Pool part: the wheelchair needs to be inserted under the console, so the pool depth should be relatively reduced. The height of the pool table is usually as follows: the height of the knee of the person sitting in the wheelchair is 180 mm, of which the pool depth is 160 mm


### 4.4.2. Intelligent Design

The modern integrated kitchen is more fashionable and humanized than the traditional kitchen. Due to the decline of memory of the elderly, sometimes they forget to turn off the gas when cooking, and often forget to turn off the light or it is inconvenient to turn off the light. Intelligent installation provides us with great convenience.(1)
The lighting design of the kitchen part is relatively simple, and the ordinary reset switch can be used. Connect the switch with the light control system to realize the control by the light system(2)
Install TV in the kitchen so that residents can watch TV and listen to FM while cooking. When visitors visit, the TV in the kitchen can also be used as a visual intercom(3)
Control the start and stop, wind speed, temperature, and mode of the kitchen air conditioner through the touch screen. If you forget to turn off the air conditioner, the elderly can turn off the air conditioner in the kitchen by pressing the “late night mode” before going to bed [22](4)
The elderly will inevitably forget to turn off the gas. The intelligent system will automatically cut off the gas valve and give an alarm when the CO concentration exceeds the standard. If the smoke concentration exceeds the standard, the alarm can be triggered. Finally, connect the lighting system with the alarm system. Once the alarm is given, the lights of the whole house will be bright to remind the residents more conveniently(5)
The highly intelligent kitchen can also monitor the residents’ diet and propose menus. After a dish is selected, the kitchen will search for its cooking methods through the Internet. The intelligent system can also be linked with the district supermarket to automatically order food


## 4.4.1. Aging Design

Standardized kitchen operation often brings inconvenience to the elderly. It is necessary to consider the arrangement order and position of kitchen utensils such as refrigerator, sink, stove, and storage cabinet in the cooking activities of the elderly. Considering that the elderly are relatively weak in terms of mobility and energy, the design should try to make the elderly shorten the time in the cooking process, make the operation steps smooth, simple, and convenient, and avoid wasting physical strength and overturning dishes and bowls.(1)
Appropriate area of the kitchen: after the kitchen is equipped with the console, the net width shall not be less than 1500 mm to ensure that there is enough turning space for the wheelchair elderly(2)
The plane layout of the kitchen: the layout form is relatively flexible. The common types are type I, II, L, H, and U. The L-shaped layout has a simple and clear operation flow line. It is reasonably arranged according to the sequence of food storage-sorting-cleaning-cutting-cooking-equipment, which is more suitable for the elderly [21](3)
Kitchen cabinets: the height from the bottom of the cabinet to the ground shall be 140~150 mm, and the height of the console shall be 750 mm. In order to facilitate the use of the elderly, the operating table with a width greater than 500 mm is more suitable, the clear height under the table should be greater than 600 mm, and the depth of the clearance under the table should be greater than 250 mm(4)
Pool part: the wheelchair needs to be inserted under the console, so the pool depth should be relatively reduced. The height of the pool table is usually as follows: the height of the knee of the person sitting in the wheelchair is 180 mm, of which the pool depth is 160 mm


## 4.4.2. Intelligent Design

The modern integrated kitchen is more fashionable and humanized than the traditional kitchen. Due to the decline of memory of the elderly, sometimes they forget to turn off the gas when cooking, and often forget to turn off the light or it is inconvenient to turn off the light. Intelligent installation provides us with great convenience.(1)
The lighting design of the kitchen part is relatively simple, and the ordinary reset switch can be used. Connect the switch with the light control system to realize the control by the light system(2)
Install TV in the kitchen so that residents can watch TV and listen to FM while cooking. When visitors visit, the TV in the kitchen can also be used as a visual intercom(3)
Control the start and stop, wind speed, temperature, and mode of the kitchen air conditioner through the touch screen. If you forget to turn off the air conditioner, the elderly can turn off the air conditioner in the kitchen by pressing the “late night mode” before going to bed [22](4)
The elderly will inevitably forget to turn off the gas. The intelligent system will automatically cut off the gas valve and give an alarm when the CO concentration exceeds the standard. If the smoke concentration exceeds the standard, the alarm can be triggered. Finally, connect the lighting system with the alarm system. Once the alarm is given, the lights of the whole house will be bright to remind the residents more conveniently(5)
The highly intelligent kitchen can also monitor the residents’ diet and propose menus. After a dish is selected, the kitchen will search for its cooking methods through the Internet. The intelligent system can also be linked with the district supermarket to automatically order food


## 5. Conclusion

As a new mode of providing for the aged, intelligent home-based elderly care is still in the initial stage of exploration. With the further development of people’s living standards and comprehensive national strength in the future, intelligent elderly care will become a strategic emerging industry. In addition to the characteristics and functions of ordinary houses, the residential design under the intelligent elderly care has higher requirements for comfort and personalization. In order to meet the needs of intellectualization and aging adaptation, the design is based on the principle of “aging adaptation, adaptation to local conditions, low-carbon environmental protection, intelligent, and efficient” to design the interior, appearance, landscape, and other hardware conditions. In addition, it should also create a safe, comfortable, energy-saving, and efficient and healthy high-quality living environment for the elderly from more aspects. In this paper, by studying the indoor environmental elements and environmental scales of residential buildings, the aging and intelligent design of the interior space environment are studied and analyzed, respectively. Only by meeting the physiological and psychological needs of the elderly, can the real-humanized design be achieved.



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*Source: 9281248-2023-02-14.xml*