Active / passive combined home monitoring system and method based on wireless indoor positioning

Abstract

The invention discloses an active / passive combined home monitoring system and method based on wireless indoor positioning, and mainly solves the problems that in the prior art, emergencies cannot be coped with autonomously, and the monitoring effect is poor. The system comprises a wireless terminal device, a wireless positioning node connected with a community hospital management platform, a community management platform and a mobile terminal application program. Wherein the wireless positioning node collects transmitted vital sign data by using wireless terminal equipment, analyzes equipment wearing and health safety conditions of a person under guardianship, and integrates AI voice interaction, comprehensive judgment and autonomous switching of working modes; under an emergency situation, the wireless positioning node analyzes an abnormal situation in real time and sends data to the community hospital management platform, and after processing, analysis and matching, the community hospital management platform sends prompt information to the community management platform and a mobile terminal of a guardian, so that monitoring is realized. According to the invention, the safety monitoring level can be effectively improved, and all-around and all-weather intelligent monitoring is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of real-time monitoring technology, and further relates to home-based elderly care monitoring technology, specifically an active / passive combined home-based monitoring system and method based on wireless indoor positioning technology, which can be used for home-based monitoring of elderly people living alone. Background Art

[0002] As they age, the judgment, memory, and hearing and vision of the elderly gradually deteriorate. Accidents such as bumps, falls, and sudden illnesses often occur at home. In particular, elderly people living alone are not always found, helped, or treated in time. Therefore, building a home monitoring system that is easy to implement and more adaptable is an urgent need that concerns the life safety of elderly people living alone.

[0003] In recent years, one of the simple and effective means of home care is to use a network-based video surveillance system. The guardian can access the video data stored in the cloud through terminal devices such as mobile phones, and can observe the home conditions of the elderly in real time. For example, the existing document with patent publication number CN104618464A discloses an intelligent home-based elderly care service system based on the Internet of Things. The invention deploys video equipment and audio equipment to collect image information and sound information of the elderly at home to enable their children to inquire about the elderly's situation. However, the collection of image and sound information in this system needs to consider a variety of environmental factors, and the frequent transmission of data increases security risks and privacy leakage risks. In addition, pagers based on wireless communication are another widely popular solution, including two types, one is to install pagers in fixed locations, and the other is to equip the elderly with portable calling devices such as mobile terminals and smart bracelets. In the prior art with patent publication number CN221124877U, a smart elderly positioning monitoring device is disclosed. The device needs to be worn by the elderly during daily activities or when going out. It can autonomously judge the elderly's fall through acceleration sensors and vibration sensors and feedback to the background for processing; or the elderly can press the alarm button on the device to trigger the buzzer to sound and the LED light beads to attract the attention of people around and provide help. This solution must be based on the premise that the elderly continue to wear the device. For non-standing stable postures, such as sitting, lying down, etc., it is difficult for the device to autonomously detect the abnormal situation of the elderly; and the elderly's autonomous call for help can only be realized if they are not living alone or outdoor passers-by can provide help.

[0004] At present, the existing guardianship plans all require the elderly to be conscious and have complete or a certain degree of autonomous mobility during the process of seeking help. Therefore, there is still room for exploration and improvement in the methods and mechanisms of home guardianship for elderly people living alone. Summary of the invention

[0005] The purpose of the present invention is to address the deficiencies of the above-mentioned prior art and propose an active / passive combined home monitoring system and method based on wireless indoor positioning, which is used to solve the problem that when the device wearing situation is unknown, the device can autonomously judge and perform all-round and all-weather safety monitoring on the ward, especially the home monitoring of the elderly living alone. When the system starts running, the ward needs to wear a wireless terminal device first, and the ward is positioned indoors and health and safety is monitored in active mode; when an abnormal situation occurs, the system switches the active / passive working mode autonomously through voice interaction and logical judgment, and conducts preliminary danger investigation; further, the dangerous situation will be notified to the relevant person in charge. Indoor positioning technology based on wireless sensor networks can realize real-time monitoring of static or mobile targets using anchor nodes at fixed positions. According to the situation of the target carrying related equipment, it is usually divided into two solutions: active positioning and passive positioning. When the elderly wear wireless terminal devices, the active positioning solution is adopted. At this time, the target position can be analyzed in real time to achieve the purpose of tracking the target's motion state, and vital signs information can also be obtained and a one-key call for help function is provided. When the elderly do not wear wireless terminal devices, a passive positioning solution is used. At this time, not only can the target motion state be tracked, but also the elderly's state can be monitored in real time through behavior recognition. In addition, the relatively stable overall indoor environment makes wireless indoor positioning technology very suitable for home monitoring of elderly people living alone, and can achieve a more detailed and diverse monitoring process than existing solutions, thereby effectively improving the safety monitoring level of elderly people living alone.

[0006] The technical solution of the present invention to achieve the above-mentioned purpose includes:

[0007] An active / passive combined home monitoring system based on wireless indoor positioning includes a wireless terminal device, a wireless positioning node, a community hospital management platform, a residential area management platform and a mobile terminal application; wherein the wireless terminal device performs wireless data transmission with the community hospital management platform via the wireless positioning node, and the community hospital management platform is connected to the residential area management platform and the mobile terminal application respectively;

[0008] The wireless terminal device is used to collect measurement data related to the real-time position of the guardian, and to exchange information with the wireless positioning node through wireless transmission in the active positioning mode, and at least has the function of vital sign monitoring and one-key call for help;

[0009] The wireless positioning node includes multiple anchor nodes and a summary node, which is used to monitor the indoor location of the ward in real time and accurately, and promptly judge the abnormal behavior of the ward. The summary node sends the abnormal situation result information after comprehensive processing to the community hospital management platform;

[0010] The community hospital management platform adopts a standardized coding system to accurately locate each ward in the community through a unique identifier and receives information data sent by the aggregation node;

[0011] The community management platform and the mobile terminal application are used to receive standardized text data sent by the community hospital management platform.

[0012] Furthermore, the above-mentioned wireless terminal device at least includes a wireless communication unit, a vital signs monitoring unit, an emergency call unit, a central control unit and a power management unit; and the wireless communication unit, the vital signs monitoring unit and the emergency call unit are independently connected to the central control unit and the power management unit respectively.

[0013] Furthermore, the above-mentioned anchor node includes a wireless communication unit, an AI voice interaction unit and a central control unit connected in sequence, and a power management unit for supplying power to these three units respectively; wherein the wireless communication unit is used to receive the measurement data collected by the wireless terminal device and send it to the central control unit, and the central control unit realizes safety monitoring and related reminders of the guardian according to the measurement data; the related reminders are carried out through the AI ​​voice interaction unit, and the central control unit responds to different monitoring conditions according to the interactive content; the summary node includes a wireless communication unit, a data cache unit, a data processing unit and a network interface unit connected in sequence, and a central control unit and a power management unit connected to these four units respectively; it is used to analyze the indoor position of the guardian, comprehensively and intelligently judge the physical condition of the guardian, selectively report the abnormal situation of the guardian to the community and the guardian, and partition and package various data for storage. The data cache unit is divided into three areas: fingerprint library, temporary cache area and call database; and the unit has a built-in active / passive location resolution algorithm.

[0014] Furthermore, the above-mentioned community hospital management platform includes a data management unit and a network interface unit; used to realize the connection between the ward, the guardian, and managers at all levels; the data management unit includes a data storage module and a data processing module; the network interface unit supports TCP / IP protocol and 4G / 5G communication protocol, and exchanges data with the external network through wired or wireless methods.

[0015] A method for active / passive combined home monitoring based on wireless indoor positioning, in which when the ward wears the wireless terminal device, the system adopts the active positioning mode, the wireless positioning node and the wireless terminal device work together to locate the ward and implement vital signs monitoring, and collect or update fingerprints for passive positioning; when the ward does not wear the wireless terminal device, the system automatically switches to the passive positioning mode, the wireless positioning nodes exchange information, locate the ward and make safety judgments; according to the actual situation and operation requirements, the system makes relevant voice reminders to the ward by judging or switching the working mode; in an emergency, the aggregation node in the wireless positioning node sends corresponding signal data to the community hospital management platform, the community hospital management platform processes the data, analyzes and matches the community to which the ward belongs and his guardian, and sends the processed data to the community management platform to which the ward belongs and the mobile terminal application of his guardian; the implementation steps are as follows:

[0016] (1) The ward checks the wireless terminal device and wears it after confirming that the device is in normal condition. The system then enters the initial working state, i.e., the active positioning mode;

[0017] (2) The aggregation node calls the anchor nodes in turn, and for the i-th anchor node AN i The distance between the wireless terminal device and the wireless terminal device is measured, where i = 1, 2, ..., n, where n represents the total number of anchor nodes; at the same time, the vital sign data of the guardian is collected, and then the measurement results are packaged together with the collected data and transmitted to the aggregation node for storage;

[0018] (3) The aggregation node determines whether the effective ratio R of the vital sign data stored in the current round meets the set standard. If so, it directly executes step (5). Otherwise, the aggregation node selects and calls the anchor node AN closest to the guardian. j , send a voice inquiry to the guardian and wait for the guardian's voice feedback, check the wearing status of the wireless terminal device, and continue to step (4);

[0019] (4) If positive feedback is received from the ward, AN j The distance measurement is performed with the wireless terminal device to collect the vital signs data of the guardian, and the data is fed back to the aggregation node to re-determine whether the vital signs data is valid; if it is valid, the data is used to replace the invalid data corresponding to the temporary buffer area, and step (5) is continued; otherwise, the maximum number of repeated measurement operations is set, and the measurement is repeated multiple times within the operation limit. If valid vital signs data is obtained, the data is used to replace the invalid data corresponding to the temporary buffer area, and step (5) is continued; if valid vital signs data is still not obtained, the AN jThe voice reminds the ward to check the wireless terminal device and proceed to step (6);

[0020] If negative feedback is obtained from the ward, relevant processing is performed according to the different feedback contents, and then step (6) is executed;

[0021] (5) The aggregation node analyzes the location of the guardian in real time according to the active positioning algorithm in the data processing unit and stores it in the fingerprint database; then, it broadcasts and switches to the passive positioning mode and continues to execute step (7);

[0022] (6) The aggregation node determines whether the data storage in the fingerprint database has reached the standard for independent passive positioning. If it has reached the standard, it broadcasts and switches to the passive mode and continues to execute step (7). Otherwise, it adopts the active positioning mode and returns to step (2).

[0023] (7) The aggregation node calls the anchor nodes in turn. Each anchor node exchanges information with all other anchor nodes except itself, collects data such as received signal strength indication RSSI, channel state information CSI or channel impulse response CIR, and packages the data and transmits it to the aggregation node;

[0024] (8) The aggregation node determines whether the data storage in the fingerprint database meets the standard for independent passive positioning. If not, the system switches to active positioning mode; otherwise, the passive positioning algorithm in the data processing unit is used to parse and estimate the location of the guardian in real time, and the corresponding data value of this round is stored in the fingerprint database;

[0025] (9) The aggregation node determines the time interval between the last effective execution of the active positioning mode and the current passive positioning process, and takes corresponding reminders to the guardian according to the time interval;

[0026] (10) The aggregation node determines whether the position of the guardian has changed since the last measurement; if so, the system switches to the active positioning mode; otherwise, it continues to determine whether the relative static time of the guardian's position exceeds the set time. If so, step (11) is executed. Otherwise, it further determines whether the effective proportion R of the vital sign data corresponding to the position of the last round of active positioning analysis meets the set standard. If so, the system switches to the active positioning mode. If not, step (11) is executed. If positive feedback is obtained, the system switches to the active positioning mode; if negative feedback is obtained, processing is performed according to the feedback content.

[0027] (11) The aggregation node filters and calls the anchor node AN that is closest to the guardian. j, send a voice inquiry to the guardian and wait for the guardian's voice feedback to check the guardian's status; if positive feedback is received, the system switches to active positioning mode; if negative feedback is received, relevant processing is performed according to different feedback contents; and then it switches to active positioning mode to achieve real-time monitoring.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] First, the present invention uses rich and comprehensive combined judgment logic to allow the system to autonomously switch between active and passive working modes. Except for the initial deployment, the system does not require the ward to frequently participate in autonomous operation, which greatly simplifies the application process and implementation difficulty, allowing the ward to easily and quickly adapt to and realize the sustainable application of the monitoring network.

[0030] Second, in abnormal situations, the present invention uses an AI voice interaction module to conduct preliminary situation investigation, classify abnormal situations through the voice feedback content of the guardian, and adopt different degrees of processing measures for different categories. This ensures that the system can not only quickly identify potential emergencies, but also take appropriate measures according to specific circumstances, avoiding overreaction or underreaction, thereby optimizing processing efficiency and accuracy while ensuring safety.

[0031] Third, since the present invention adopts a coding system to determine the guardian and various signal data in the entire system; in addition, relevant data such as work and rest time and home map are stored in the local summary node, the positioning data is updated in real time, and the vital signs data is selectively retained and transmitted to the community hospital management platform, which effectively balances the relationship between personal privacy protection, data security management and intelligent monitoring applications.

[0032] Compared with the existing home monitoring system, this system has significantly improved the performance and user experience of the monitoring system through the deep integration of the above-mentioned innovative technologies and actual application needs, ensured the data security of users, and effectively balanced the relationship between personal privacy protection, data security management and intelligent monitoring applications. It provides a safer, more efficient and private monitoring service, and builds a comprehensive, all-weather intelligent monitoring network. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural block diagram of the system of the present invention;

[0034] Figure 2 The overall network architecture diagram of the system of the present invention;

[0035] Figure 3 A schematic diagram of the structure of an anchor node in the system of the present invention;

[0036] Figure 4It is a structural schematic diagram of a summary node in the system of the present invention;

[0037] Figure 5 A schematic diagram of the structure of a wireless terminal device in the system of the present invention;

[0038] Figure 6 This is a schematic diagram of the structure of the community hospital management platform in the system of the present invention;

[0039] Figure 7 The present invention is a flowchart for implementing the method of the present invention. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0041] Example 1: Reference Figure 1 , the present invention proposes an active / passive combined home monitoring system based on wireless indoor positioning, which specifically includes: a wireless terminal device, a wireless positioning node, a community hospital management platform, a community management platform and a mobile terminal application; wherein the wireless terminal device performs wireless data transmission with the community hospital management platform through the wireless positioning node, and the community hospital management platform is connected to the community management platform and the mobile terminal application respectively;

[0042] The wireless terminal device is used to collect measurement data related to the real-time location of the person under guardianship, and to exchange information with the wireless positioning node through wireless transmission in the active positioning mode. It also has at least vital signs monitoring function and one-key call for help function. To achieve these functions, the device includes at least a wireless communication unit, a vital signs monitoring unit, an emergency call unit, a central control unit and a power management unit; and the wireless communication unit, the vital signs monitoring unit and the emergency call unit are independently connected to the central control unit and the power management unit.

[0043] The wireless positioning node includes multiple anchor nodes and an aggregation node, which are used to monitor the indoor location of the ward in real time and accurately, and to judge the abnormal behavior of the ward in time. The aggregation node sends the monitored location information and abnormal behavior information to the community hospital management platform. Among them, the anchor node includes a wireless communication unit, an AI voice interaction unit and a central control unit connected in sequence, and a power management unit for supplying power to these three units respectively; wherein the wireless communication unit is used to receive the measurement data collected by the wireless terminal device and send it to the central control unit, and the central control unit realizes the safety monitoring and related reminders of the ward according to the measurement data; the related reminders are carried out through the AI ​​voice interaction unit, and the central control unit responds to different monitoring conditions according to the interactive content; the aggregation node includes a wireless communication unit, a data cache unit, a data processing unit and a network interface unit connected in sequence, and a central control unit and a power management unit connected to these four units respectively; it is used to analyze the indoor location of the ward, comprehensively and intelligently judge the physical condition of the ward, selectively report the abnormal situation of the ward to the community and the guardian, and partition and package and store various data; the above-mentioned data cache unit is divided into three parts: fingerprint library, temporary cache area and call database; and the unit has a built-in active / passive location resolution algorithm.

[0044] The community hospital management platform adopts a standardized coding system to accurately locate each ward in the community through a unique identifier and receive information data sent by the aggregation node; the platform is used to realize the connection between the ward, the guardian, and managers at all levels, including a data management unit and a network interface unit, and the data management unit includes a data storage module and a data processing module. The network interface unit in this embodiment supports TCP / IP protocol and 4G / 5G communication protocol, and exchanges data with the external network through wired or wireless methods.

[0045] The community management platform and the mobile terminal application are used to receive standardized text data sent by the community hospital management platform.

[0046] Embodiment 2: The overall structure of the active / passive combined home monitoring system proposed in this embodiment is the same as that of Embodiment 1. Figure 2 A specific example is given to further describe the network architecture of the system of the present invention in detail:

[0047] The system of the present invention comprises a wireless positioning node, a wireless terminal device, a community hospital management platform, a community management platform and a mobile terminal application program, wherein the wireless positioning node, the community management platform and the mobile terminal application program are all connected to the community hospital management platform.

[0048] Specifically, in a community system, intelligent home monitoring of each ward is achieved through wireless terminal devices and wireless positioning nodes deployed indoors. The aggregation nodes of the deployed wireless positioning nodes can transmit data bidirectionally with the community hospital management platform. In the event of an emergency, the aggregation node sends the corresponding signal data to the community hospital management platform. After a series of processing by the community hospital management platform, various types of data are sent to the community management platform and mobile terminal applications in the form of standardized text data, ensuring that the management of the community to which the ward belongs and his guardian can quickly understand the ward's abnormal condition or distress information, and can quickly respond and take necessary measures.

[0049] In actual deployment scenarios, Figure 2 Taking the guardian No. 1 in community A as an example, several anchor nodes and an aggregation node are deployed in the entire room where he lives. These nodes work together with the wearable wireless terminal device worn by the guardian to monitor the guardian's location, vital signs and safety status in real time. When the system detects an abnormal situation of the guardian or captures the guardian's distress message, the aggregation node sends signal data containing detailed information of the situation to the community hospital management platform according to the current situation. After receiving the signal data, the community hospital management platform converts the original signal data into clear standardized text data, and at the same time analyzes and determines the community (community A) to which the guardian belongs and his guardians (including guardian 1-1 of community A, guardian 1-2 of community A, and guardian 1-3 of community A). Subsequently, the community hospital management platform sends the standardized text data to the management platform of community A and the mobile terminal applications of the three guardians through the corresponding network interface.

[0050] Embodiment 3: The overall structure of the active / passive combined home monitoring system proposed in this embodiment is the same as that of Embodiment 1. Figure 3-4 , the wireless positioning node in the system of the present invention is further described in detail:

[0051] Figure 3 and Figure 4 The diagrams are respectively the structural diagrams of the anchor node and the aggregation node in the system of the present invention, which together constitute the wireless positioning node. The wireless positioning node in the system includes several anchor nodes and one aggregation node, which can monitor the indoor position of the ward in real time and accurately, timely judge the potential risks corresponding to abnormal movement or long-term stillness, and provide immediate response to possible emergencies.

[0052] Specifically, the anchor node is used to collect and transmit wireless measurements related to the real-time location of the ward, and to perform safety monitoring and related reminders on the ward through AI voice interaction; it includes a wireless communication unit, an AI voice interaction unit, a central control unit, and a power management unit. The wireless communication unit is used to realize wireless communication and data transmission with the aggregation node, other anchor nodes, and wireless terminal devices; the AI ​​voice interaction unit is used to perform safety monitoring and related reminders on the ward through voice inquiries and receiving and judging voice feedback; the central control unit is used to call and control other units.

[0053] In actual deployment scenarios, given the small size and low energy consumption of anchor nodes, their deployment locations can be flexibly arranged based on factors such as the height of the person being guarded and the layout of the indoor environment. Considering that anchor nodes need to run continuously for a long time, they can be installed inside lamps in various rooms or inside wall power sockets, but wall power sockets are currently the most ideal choice for installation. On the one hand, wall power sockets can provide a stable power supply to anchor nodes, ensuring that they can work uninterruptedly for a long time; on the other hand, wall power sockets are commonly found in every corner of the room, with sufficient number and moderate height, which is conducive to the formation of a dense signal coverage network for anchor nodes, improving the breadth and accuracy of positioning measurements, and effectively avoiding physical damage that may be caused to them by daily activities, ensuring the long-term stable operation of the equipment.

[0054] Specifically, the aggregation node is used to analyze the indoor location of the guardian, comprehensively and intelligently judge the physical condition of the guardian, and partition and package various data for storage; it includes a wireless communication unit, a data cache unit, a data processing unit, a network interface unit, a central control unit and a power management unit. The wireless communication unit is used to realize wireless communication and data transmission between anchor nodes and wireless terminal devices; the data cache unit is divided into three parts: a fingerprint library, a temporary cache area and a call database. The fingerprint library is used to store passive wireless measurements and corresponding positions related to the real-time position of the guardian, and is continuously updated with the changes in indoor furnishings and the movement of the guardian. The temporary cache area is used to temporarily store active wireless measurements and vital signs data related to the real-time position of the guardian. The call database is used to store relatively unchanged information that needs to be called, including indoor maps, the guardian's daily schedule, standard vital signs reference values ​​for the guardian's current age and state, sensitive vocabulary library, and signal data (including prompt signal data, alarm signal data and emergency call signal data); the data processing unit has a built-in active / passive position resolution algorithm, which can resolve the guardian's position based on wireless measurements related to the guardian's real-time position; the network interface unit is used to realize high-speed data transmission between the community hospital management platform.

[0055] It is particularly pointed out that after completing a round of positioning, the measurement data stored in the temporary cache area will be deleted, and the corresponding storage space will be released immediately. This mechanism helps to reduce the operating pressure of the aggregation node, thereby improving the overall operating efficiency and response speed of the system. However, in addition to active wireless measurements related to the real-time location of the ward, a flexible application solution can be selected for the management of vital signs data. For example, the vital signs data of the ward can be transmitted to the community hospital in the area to which they belong for long-term monitoring of the ward's physical condition, supporting more accurate health assessments and disease warnings, while also increasing the guardian's understanding of the ward's health status and improving the overall quality of care.

[0056] In the actual deployment scenario, considering that the aggregation node is the core component of the system, it must have strong computing power and storage capacity to control all anchor nodes and recover all sensor data in real time. Compared with the anchor node, it will be larger in size and more complex in function. It should be deployed at a lower position close to a stable power source. This location should be less susceptible to interference from daily activities and physical damage. While ensuring continuous power supply, it can also protect the equipment itself and ensure that its normal operation is not affected by power problems or external environmental factors. In addition, the network interface unit of the aggregation node supports TCP / IP protocol and 4G / 5G communication protocol, and can exchange data with external networks in both wired and wireless ways to ensure that relevant information can be transmitted to the community hospital management platform in a timely and accurate manner.

[0057] Embodiment 4: The overall structure of the active / passive combined home monitoring system proposed in this embodiment is the same as that of Embodiment 1. Figure 5 , the wireless terminal device in the system of the present invention is further described in detail:

[0058] Figure 5 It is a structural schematic diagram of the wireless terminal device in the system of the present invention. The wireless terminal device is used to exchange information with each anchor node in the active positioning mode to collect and transmit wireless measurements related to the real-time position of the guardian. It also has vital signs monitoring function and one-key call for help function to ensure that the health status of the guardian is promptly paid attention to and processed; it includes a wireless communication unit, a vital signs monitoring unit, an emergency call unit, a central control unit and a power management unit; the wireless communication unit is used for wireless communication and data transmission between the aggregation node and the anchor node; the vital signs detection unit is used to continuously monitor the heart rate, blood oxygen, pulse and other health indicators of the guardian; the emergency call unit is used for the guardian to autonomously make an emergency call when wearing the wireless terminal device.

[0059] It is particularly pointed out that the structural composition of the wireless terminal device is not limited to the functional modules mentioned above, and its components can be expanded and customized according to specific application requirements, and additional hardware components or software functions can be added to the above structural composition to enhance device performance, meet a wider range of application scenarios, and improve user experience. For example, in actual deployment scenarios, the device can also add 4G / 5G modules, Beidou or GPS positioning modules to expand the outdoor positioning function of the wireless terminal device, and modify and optimize the network architecture and data transmission protocol accordingly to achieve all-round seamless monitoring.

[0060] Embodiment 5: The overall structure of the active / passive combined home monitoring system proposed in this embodiment is the same as that of Embodiment 1. Figure 6 , the community hospital management platform in the system of the present invention is further described in detail:

[0061] Figure 6 This is a structural diagram of the community hospital management platform in the system of the present invention. The platform is used to achieve connections between the guardian and the guardian, the community hospital and the platform managers at all levels of the community, forming a fast-response multi-level three-dimensional emergency response system; it includes a data management unit and a network interface unit.

[0062] Specifically, the data management unit includes a data storage module and a data processing module. The data storage module is used to store the relevant information of each ward, including the name and code of the ward, detailed home address, the community name and the network interface code of the management platform, and the name of the guardian and its network interface code, and encapsulates and stores the household as the basic unit. The data processing module is used to match the various types of data information received with the data in the data storage module, and convert them into standardized text data.

[0063] In the actual deployment scenario, take a community as an example. The community covers four communities, A, B, C, and D, which are coded as "001", "002", "003", and "004" respectively. The identity and location information of the guardian of Household 101, Unit 1, Building 1 in Community A is determined by the unique code "0010101101" (001 / 01 / 01 / 101). The signal data in the summary node also follows this set of coding rules. For example, "01" represents prompt signal data, "02" represents alarm signal data, and "03" represents emergency signal data. When the network interface captures the code "001010110103", the data processing module immediately starts matching analysis and determines that this signal data originates from "the emergency call issued by the guardian of Household 101, Unit 1, Building 1, Community A", and then converts the original signal data into clear standardized text data based on the pre-stored detailed information. For example, "A community guardian: The guardian of XXX in the area under your charge, Unit 1, Building 1, Household 101, is experiencing an emergency, which has triggered an emergency call for help. Please go to the scene immediately to handle it!!", "Guardian XXX: The guardian XXX is experiencing an emergency, which has triggered an emergency call for help. Please go to the scene immediately to handle it!!". At the same time, the data processing module quickly and accurately matches the management platform network interface of the community where the guardian is located, as well as the personal network interface of his guardian, and sends the generated standardized text data to them, ensuring that all kinds of information notifications can be conveyed to the relevant responsible persons in a timely and accurate manner.

[0064] Throughout the system, a standardized coding system is used to accurately locate each guardian in the community through a unique identifier, as well as all types of signal data they may emit.

[0065] It is particularly pointed out that in this system architecture, the community hospital management platform is selected as the core hub instead of the traditional community management platform. There are two main reasons:

[0066] (1) Comprehensiveness of service coverage.

[0067] Given that some old residential areas, urban villages, and rural areas or independent households around towns may lack property management agencies to centrally manage the data of the wards or provide door-to-door services. In contrast, community hospitals, as public service agencies, not only have a high penetration rate, but also their geographical division method can effectively cover and serve various communities or independent households. This ensures that even in areas lacking professional property management, the wards can receive timely health monitoring and necessary services.

[0068] 2. Health needs of target groups

[0069] Considering that the guardians are mainly elderly people with limited self-care ability, this special group generally faces the challenge of declining physical functions. Therefore, regular physical health assessment and examination is an indispensable project for them. Establish a health file for each guardian, provide regular comprehensive health examinations according to the regional layout of community hospitals, and store physical examination data in their health files. These data are not only archived within the community hospital, but also synchronized to the summary node as the standard vital signs reference value of the guardian's current age and state, and are dynamically updated according to the most recent physical examination time. This mechanism ensures the timeliness and accuracy of individual standard vital signs reference values, avoids the risk of misjudgment caused by delayed database updates and unified reference standards, and thus ensures the accurate operation of the active positioning solution.

[0070] Embodiment 6: The overall structure of the active / passive combined home monitoring system proposed in this embodiment is the same as that of Embodiment 1. Now, the cell management platform and the mobile terminal application in the system of the present invention are further described in detail:

[0071] The community management platform and mobile terminal application in the monitoring system are used to receive standardized text data sent by the community hospital management platform so that the community management and the ward can respond quickly to various special situations and unexpected conditions, and take timely and effective measures to ensure the safety and health of the ward.

[0072] In practical applications, the method of delivering standardized text data to guardians is flexible and is not limited to specific mobile terminal applications. It can also be delivered via WeChat applets or directly to the guardian's mobile phone via text messages. However, it should be recognized that the functions of WeChat applets currently have certain limitations, and text messages, as a more traditional communication method, are now mainly used for the dissemination of advertising information and the sending of various verification codes, and their frequency of use and value are relatively low. In addition, at the specific operational level, the path for delivering standardized text data to guardians is not limited to the above-mentioned "directly sent from the community hospital management platform to the mobile terminal application". For prompt signals with lower severity, the above-mentioned direct path can be used, and for more serious alarm signals and emergency distress signals that require immediate attention, the community hospital management platform can first notify the guardian's community management party to conduct preliminary on-site verification and related processing. After confirming the situation, the community management party is responsible for notifying the guardian to ensure that the guardian understands and responds in a timely manner.

[0073] Example 7: Reference Figure 7The present invention proposes a method for home monitoring according to the system described in Example 1. When the ward wears the wireless terminal device, the system adopts an active positioning mode, and the wireless positioning node works in coordination with the wireless terminal device to locate the ward and implement vital sign monitoring, and collect or update fingerprints for passive positioning; when the ward does not wear the wireless terminal device, the system automatically switches to a passive positioning mode, and the wireless positioning nodes exchange information to locate and make safety judgments for the ward; according to actual conditions and operational requirements, the system makes relevant voice reminders to the ward by judging or switching working modes; in an emergency, the aggregation node in the wireless positioning node sends corresponding signal data to the community hospital management platform, and the community hospital management platform processes the data, and analyzes and matches the community to which the ward belongs and his guardian, and sends the processed data to the community management platform to which the ward belongs and the mobile terminal application of his guardian; specifically, the following steps are included:

[0074] Step 1. The guardian checks the wireless terminal device and wears it after confirming that the device is in normal state. The system enters the initial working state, that is, the active positioning mode;

[0075] Step 2. The aggregation node calls the anchor nodes in turn, and for the i-th anchor node AN i The distance between the wireless terminal device and the wireless terminal device is measured, where i = 1, 2, ..., n, where n represents the total number of anchor nodes; at the same time, the vital sign data of the guardian is collected, and then the measurement results are packaged together with the collected data and transmitted to the aggregation node for storage;

[0076] Step 3. The aggregation node determines whether the effective ratio R of the vital signs data stored in the current round meets the set standard. If so, it directly executes step 5. Otherwise, the aggregation node filters and calls the anchor node AN closest to the guardian. j , send a voice inquiry to the guardian and wait for the guardian's voice feedback, check the wearing status of the wireless terminal device, and continue to step 4;

[0077] Step 4. If positive feedback is received from the ward, AN j The distance measurement is carried out with the wireless terminal device to collect the vital signs data of the guardian, and the data is fed back to the aggregation node to re-determine whether the vital signs data is valid; if it is valid, the data is used to replace the invalid data corresponding to the temporary buffer area, and step 5 is continued; otherwise, the maximum number of repeated measurement operations is set, and the measurement is repeated multiple times within the limited range of the operation. If valid vital signs data is obtained, the data is used to replace the invalid data corresponding to the temporary buffer area, and step 5 is continued; if valid vital signs data is still not obtained, the AN jThe voice reminds the guardian to check the wireless terminal device and proceed to step 6;

[0078] If negative feedback is obtained from the ward, relevant processing is performed according to the different feedback contents, and then step 6 is executed; here, relevant processing is performed according to the different feedback contents, specifically, according to the negative feedback obtained from the ward, corresponding operations are performed, including reminding to charge or put on the device again, repeating inquiries and raising the volume, notifying the ward's community, and notifying the guardian to take measures.

[0079] Step 5. The aggregation node analyzes the location of the guardian in real time according to the active positioning algorithm in the data processing unit and stores it in the fingerprint database; then, it broadcasts and switches to the passive positioning mode and continues to step 7;

[0080] Step 6. The aggregation node determines whether the data storage in the fingerprint database has reached the standard for independent passive positioning. If it reaches the standard, it broadcasts and switches to the passive mode and continues to step 7. Otherwise, it adopts the active positioning mode and returns to step 2.

[0081] Step 7. The aggregation node calls the anchor nodes in turn, and each anchor node exchanges information with all other anchor nodes except itself, collects data such as received signal indication strength RSSI, channel state information CSI or channel impulse response CIR, and packages the data and transmits it to the aggregation node;

[0082] Step 8. The aggregation node determines whether the data storage in the fingerprint database meets the standard for independent passive positioning. If not, the system switches to active positioning mode; otherwise, the passive positioning algorithm in the data processing unit is used to parse and estimate the location of the guardian in real time, and the corresponding data value of this round is stored in the fingerprint database;

[0083] Step 9. The aggregation node determines the time interval between the last effective execution of the active positioning mode and the current passive positioning process, and takes corresponding reminders to the guardian according to the time interval;

[0084] Step 10. The summary node determines whether the position of the ward has changed since the last measurement; if so, the system switches to the active positioning mode; otherwise, it continues to determine whether the relative static time of the ward exceeds the set time. If so, execute step 11. Otherwise, it further determines whether the effective proportion R of the vital sign data corresponding to the position of the last round of active positioning analysis meets the set standard. If so, the system switches to the active positioning mode. If not, execute step 11. If positive feedback is obtained, the system switches to the active positioning mode; if negative feedback is obtained, it is processed according to the feedback content.

[0085] Step 11. The aggregation node filters and calls the anchor node AN that is closest to the guardian j , send a voice inquiry to the guardian and wait for the guardian's voice feedback to check the guardian's status; if positive feedback is received, the system switches to active positioning mode; if negative feedback is received, relevant processing is performed according to different feedback contents; and then it switches to active positioning mode to achieve real-time monitoring.

[0086] Embodiment 8: The overall implementation steps of the monitoring method proposed in this embodiment are the same as those of Embodiment 7. Now, a specific example is given to further describe the implementation process of the method of the present invention in detail:

[0087] After completing the installation of the wireless positioning node, the connection of the network interfaces between the various parts, and the pre-storage of the relevant information of the guardian, the system begins the positioning work.

[0088] Specifically, when the ward wears a wireless terminal device, the active positioning mode is adopted, and the aggregation node broadcasts 3 times, so that the entire wireless monitoring network enters the active positioning working mode, and all anchor nodes wait to receive instructions.

[0089] The aggregation node sends the information to the anchor node AN i (i=1,2,…,n) Send work instructions, AN i After receiving the instruction, the distance is measured with the wireless terminal device, and the vital sign data of the person being monitored is collected and transmitted at the same time. Taking anchor nodes AN1 and AN2 as an example, AN1 packages the measured distance and the received vital sign data in the form of {Distance1, Vital Sign1} and transmits them to the aggregation node. The aggregation node stores {Distance1, Vital Sign1} in the temporary buffer area and then sends a work instruction to AN2. AN2 and AN1 perform the same workflow. The aggregation node receives {Distance1, Vital Sign1} from all anchor nodes in turn. n , Vital Sign n}.

[0090] The aggregation node accesses the temporary buffer area to determine whether the effective ratio R of the Vital Sign data stored in the current round reaches 50%, that is, the ratio of the effective vital sign data in the current round to the total vital sign data.

[0091] When R reaches 50%, the aggregation node accesses the temporary cache area, parses the location of the guardian according to n Distance and the active positioning algorithm, and stores it in the fingerprint library. After that, the entire wireless monitoring network switches to the passive positioning scheme.

[0092] When R does not reach 50%, the aggregation node accesses the temporary cache area to determine the anchor node AN corresponding to the minimum value of Distance stored in the current round. j , that is, the anchor node AN closest to the guardian j The aggregation node sends j Send voice work instructions, AN j After receiving the voice work instruction, a voice inquiry "Are you wearing the device?" is sent to the guardian, and the guardian waits for voice feedback to check the wearing status of the wireless terminal device.

[0093] If positive feedback is obtained from the ward, AN j The wireless terminal device measures the distance to the guardian separately, and the wireless terminal device measures the vital signs of the guardian again. j Feedback to the summary node to determine whether the vital sign data is valid. If the individual measurement results in invalid vital sign data, repeat the operation.

[0094] When the number of repetitions does not exceed 5, if valid vital sign data is obtained, the group of data {Distance i , Vital Sign i}Replace the original data into the temporary cache. Summarize the access to the temporary cache, analyze the location of the person under guardianship according to n distances and the active positioning algorithm, and then the entire wireless monitoring network switches to the passive positioning mode.

[0095] If the operation is repeated more than 5 times and still no valid vital signs data can be obtained, the AN is triggered. j The voice reminder prompts the guardian to check the battery level or wearing method of the wireless terminal device. The aggregation node determines whether the data storage in the fingerprint database has reached the standard for independent passive positioning. If it has reached the standard, the entire wireless monitoring network switches to the passive positioning solution, otherwise it continues to use the active positioning solution.

[0096] If negative feedback is received from the ward, different degrees of processing will be performed according to the content of the feedback. Specifically, negative feedback is divided into three situations according to the feedback: feedback that the device is not worn, unclear feedback or no feedback, and feedback sensitive words (such as "help"). In the first case, the system waits for 1 minute for the ward to wear the wireless terminal device and then goes to the next step. In the second case, the system waits for 15 seconds to receive as much voice feedback as possible, and the anchor node AN j Feedback to the summary node, the summary node sends the secondary alarm signal data to the community hospital management platform, the community hospital management platform converts the original signal data into standardized text data, and sends it to the management platform of the community to which the guardian belongs. The summary node calls AN againj The guardian is asked a voice question, "Are you wearing the device?" If the feedback result is still "unclear or no feedback", repeat the above operation until the number of inquiries reaches 10, and then go to the next step. j The situation is immediately fed back to the summary node, which sends the first-level alarm signal data to the community hospital management platform. The community hospital management platform converts the original signal data into standardized text data and sends it to the management platform of the community to which the guardian belongs and the guardian's mobile terminal application. Repeat the above operation until the number of transmissions reaches 10 times, and then go to the next step.

[0097] Then the aggregation node determines whether the data storage in the fingerprint database has reached the standard for independent passive positioning. If it has reached the standard, the entire wireless monitoring network switches to the passive positioning solution, otherwise it continues to use the active positioning solution.

[0098] Specifically, when the positioning data in the fingerprint database has not been fully collected, or when the data storage in the fingerprint database has met the standard for independent passive positioning, if the guardian does not wear a wireless communication device or gives negative feedback during voice inquiries, a passive positioning solution is adopted, and the aggregation node broadcasts 3 times, causing the entire wireless monitoring network to enter the passive positioning working mode, and all anchor nodes wait to receive instructions.

[0099] The aggregation node sends the information to the anchor node AN i (i=1,2,…,n) Send work instructions, AN i After receiving the command, it exchanges information with all other anchor nodes. Taking anchor nodes AN1 and AN2 as an example, AN1 will exchange the RSSI, CSI or CIR data values ​​obtained during the information exchange with other anchor nodes in the entire network. The aggregate node will be packaged in the form of After being stored in the fingerprint database, the work instruction is sent to AN2, and AN2 performs the same workflow as AN1. The aggregation node receives the information sent back by all anchor nodes in turn.

[0100] The aggregation node determines whether the data storage in the fingerprint database meets the standard for independent passive positioning. If it does not meet the standard, the entire wireless monitoring network switches to active positioning mode to supplement the data in the fingerprint database; if it meets the standard, the location of the guardian is estimated based on {Distance nn} and the passive positioning algorithm, and corresponds to the position of the guardian in the round. Stored in the fingerprint library.

[0101] In order to avoid the problem of fingerprint database data mismatch caused by long-term non-active positioning, the aggregation node accesses the temporary cache area to determine the time interval between the last effective execution of the active positioning process and the current passive positioning process, and takes different degrees of reminders to the guardian according to the length of the time interval.

[0102] It is particularly pointed out that the effective execution of active positioning means that during the execution of the plan, the location of the guardian can be obtained according to relevant measurements and algorithms and stored in the fingerprint database, including two situations: the effective proportion R of vital signs data reaches 50%; the effective proportion of vital signs data does not reach 50% but after obtaining positive feedback from the guardian, valid vital signs data can be obtained within 5 repetitions.

[0103] Specifically, there are five cases according to the length of the time interval: within 1 day, 1-3 days, 3-5 days, 5-7 days, and more than 7 days. In the first case, there is basically no large mismatch in the data in the fingerprint database, and no reminder is given to the guardian. In the second case, the aggregation node accesses the fingerprint database and determines the nearest anchor node AN based on the guardian's location. j , and to AN j Send voice work instructions, AN j After receiving the voice work instruction, a voice reminder is issued to the guardian: "The system detects that you have not worn the device for a long time. For your health and safety, please wear it as soon as possible." At the same time, the aggregation node sends the prompt signal data to the community hospital management platform, and the community hospital management platform converts the original signal data into standardized text data and sends it to the guardian's mobile terminal application. In the third case, the aggregation node sends the prompt signal data to the community hospital management platform, and the community hospital management platform converts the original signal data into standardized text data and sends it to the management platform of the community to which the guardian belongs. In the fourth case, the aggregation node sends the prompt signal data to the community hospital management platform, and the community hospital management platform converts the original signal data into standardized text data and sends it to the management platform of the community to which the guardian belongs and the guardian's mobile terminal application. In the fifth case, the aggregation node sends the first-level alarm signal data to the community hospital management platform, and the community hospital management platform converts the original signal data into standardized text data and sends it to the management platform of the community to which the guardian belongs and the guardian's mobile terminal application.

[0104] In order to prevent the guardian from being unable to be monitored due to unexpected situations (abnormal movement, stillness, etc.) in the passive positioning mode, the aggregation node accesses the fingerprint library to determine whether the guardian's position has changed to a certain extent compared to the last measurement. If there is a certain degree of change, the entire wireless monitoring network switches to active positioning mode. On the contrary, when the guardian's position is relatively still, it is determined whether the relative stillness time of the guardian's position has exceeded 10 minutes; if it has not exceeded, it is further determined whether the effective proportion R of the Vital Sign data corresponding to the last round of active positioning and resolution has reached 50%. If it reaches 50%, the entire system switches to active positioning mode. In the case that the guardian's position is relatively still compared to the last measurement, the relative stillness time has exceeded 10 minutes or the effective proportion of the vital sign data corresponding to the last round of active positioning and resolution has not reached 50%, then according to the guardian's position at this time, the aggregation node calls the anchor node AN that is closest to the guardian. j , a voice inquiry is made to the guardian: "The system detects that you have not moved for a long time, are you okay?" If positive feedback is received, the entire wireless monitoring network switches to the active positioning mode; if negative feedback is received, different degrees of processing are performed according to the feedback content, and then the entire wireless monitoring network switches to the active positioning solution.

[0105] Specifically, negative feedback is divided into three situations according to the feedback content: unclear feedback, no feedback, and feedback of sensitive words. In the first case, the system waits for 10 seconds to receive as much voice feedback as possible, and the anchor node AN j Feedback to the summary node, 10 seconds later the summary node calls AN again j Initiate a voice inquiry to the guardian: "The system detects that you have not moved for a long time, are you okay?" If the feedback result is still "Unclear feedback", repeat the above operation until the number of inquiries reaches 3, and then switch directly to active mode. In the second case, the aggregation node accesses the data cache unit and determines the specific area of ​​the guardian's location in the room based on the indoor map; if it is in a safe area (around the bed in the bedroom, around the sofa, in the kitchen or bathroom, etc.), it continues to determine whether the current relative static time is consistent with the pre-stored work and rest time of the guardian. If it is not consistent with his daily work and rest time, the system waits for 10 minutes and the aggregation node calls AN again. j Initiate a voice inquiry to the guardian: "The system detects that you have not moved for a long time, are you okay?" The inquiry volume is higher than the previous one. If the feedback result is still "no feedback", repeat the above operation until the number of inquiries reaches 3, and then switch to active mode directly; if the guardian is not in a safe area or the work and rest time is in line with his daily routine, switch to active mode directly. In the third case, AN jThe situation is immediately fed back to the aggregation node, which sends the first-level alarm signal data to the community hospital management platform. The community hospital management platform converts the original signal data into standardized text data and sends it to the management platform of the community to which the guardian belongs and the mobile terminal application of the guardian.

[0106] Based on the above content, the present invention takes the active / passive joint solution as the main framework and adopts wireless indoor positioning technology. Under the premise of active cooperation of the ward, the guardian and the community, through the seamless connection, autonomous switching and three-dimensional circulation of the active / passive working modes, the ward can be positioned in real time under any working conditions and random motion states indoors. At the same time, the health and safety of the ward can also be monitored to a certain extent to effectively prevent and respond to emergencies.

[0107] Parts of the present invention that are not described in detail belong to common knowledge among those skilled in the art.

[0108] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Obviously, for professionals in this field, after understanding the content and principles of the present invention, they may make various modifications and changes in form and details without departing from the principles and structures of the present invention. However, these modifications and changes based on the ideas of the present invention are still within the scope of protection of the claims of the present invention.

Claims

1. An active / passive combined home monitoring system based on wireless indoor positioning, characterized in that: include: Wireless terminal equipment, wireless positioning nodes, community hospital management platforms, residential management platforms and mobile terminal applications; The wireless terminal equipment transmits wireless data to the community hospital management platform through the wireless positioning node, and the community hospital management platform is connected to the community management platform and the mobile terminal application respectively; The wireless terminal device is used to collect measurement data related to the real-time position of the guardian, and to exchange information with the wireless positioning node through wireless transmission in the active positioning mode, and at least has the function of vital sign monitoring and one-key call for help; The wireless positioning node includes multiple anchor nodes and a summary node, which is used to monitor the indoor location of the ward in real time and accurately, and promptly judge the abnormal behavior of the ward. The summary node sends the monitored location information and abnormal behavior information to the community hospital management platform; The community hospital management platform adopts a standardized coding system to accurately locate each ward in the community through a unique identifier and receives information data sent by the aggregation node; The community management platform and the mobile terminal application are used to receive standardized text data sent by the community hospital management platform.

2. The system according to claim 1, characterized in that: The wireless terminal device at least includes a wireless communication unit, a vital sign monitoring unit, an emergency call unit, a central control unit and a power management unit; and the wireless communication unit, the vital sign monitoring unit and the emergency call unit are independently connected to the central control unit and the power management unit respectively.

3. The system according to claim 1, characterized in that: The anchor node includes a wireless communication unit, an AI voice interaction unit and a central control unit connected in sequence, and a power management unit for supplying power to the three units respectively; wherein the wireless communication unit is used to receive the measurement data collected by the wireless terminal device and send it to the central control unit, and the central control unit implements safety monitoring and related reminders for the guardian according to the measurement data; the related reminders are carried out through the AI ​​voice interaction unit, and the central control unit responds to different monitoring conditions according to the interaction content; the aggregation node includes a wireless communication unit, a data cache unit, a data processing unit and a network interface unit connected in sequence, and a central control unit and a power management unit connected to the four units respectively; It is used to analyze the indoor location of the guardian, make comprehensive and intelligent judgments on the guardian's physical condition, selectively report abnormal conditions of the guardian to the community and guardian, and package and store various data in partitions.

4. The system according to claim 3, characterized in that: The data cache unit is divided into three areas: a fingerprint library, a temporary cache area and a call database; and the unit has a built-in active / passive location resolution algorithm.

5. The system according to claim 1, characterized in that: The community hospital management platform includes a data management unit and a network interface unit, which are used to realize the connection between the ward, the guardian, and managers at all levels.

6. The system according to claim 5, characterized in that: The data management unit includes a data storage module and a data processing module.

7. The system according to claim 3 or 5, characterized in that: The network interface unit supports TCP / IP protocol and 4G / 5G communication protocol, and exchanges data with the external network via wired or wireless methods.

8. The method for performing home monitoring according to the system of claim 1, characterized in that: When the ward is wearing the wireless terminal device, the system adopts the active positioning mode, and the wireless positioning node works in conjunction with the wireless terminal device to locate the ward and monitor vital signs, while collecting or updating fingerprints for passive positioning; when the ward is not wearing the wireless terminal device, the system automatically switches to the passive positioning mode, and the wireless positioning nodes exchange information to locate the ward and make safety judgments; according to the actual situation and operation requirements, the system makes relevant voice reminders to the ward by judging or switching the working mode; In an emergency, the aggregation node in the wireless positioning node sends the corresponding signal data to the community hospital management platform, which processes the data, analyzes and matches the cell to which the ward belongs and his guardian, and sends the processed data to the cell management platform to which the ward belongs and the mobile terminal application of his guardian; the implementation steps are as follows: (1) The ward checks the wireless terminal device and wears it after confirming that the device is in normal condition. The system then enters the initial working state, i.e., the active positioning mode; (2) The aggregation node calls the anchor nodes in turn, and for the i-th anchor node AN i The distance between the wireless terminal device and the wireless terminal device is measured, where i = 1, 2, ..., n, where n represents the total number of anchor nodes; at the same time, the vital sign data of the guardian is collected, and then the measurement results are packaged together with the collected data and transmitted to the aggregation node for storage; (3) The aggregation node determines whether the effective ratio R of the vital sign data stored in the current round meets the set standard. If so, it directly executes step (5). Otherwise, the aggregation node selects and calls the anchor node AN closest to the guardian. j , send a voice inquiry to the guardian and wait for the guardian's voice feedback, check the wearing status of the wireless terminal device, and continue to step (4); (4) If positive feedback is received from the ward, AN j The distance measurement is performed with the wireless terminal device to collect the vital signs data of the guardian, and the data is fed back to the aggregation node to re-determine whether the vital signs data is valid; if it is valid, the data is used to replace the invalid data corresponding to the temporary buffer area, and step (5) is continued; otherwise, the maximum number of repeated measurement operations is set, and the measurement is repeated multiple times within the operation limit. If valid vital signs data is obtained, the data is used to replace the invalid data corresponding to the temporary buffer area, and step (5) is continued; if valid vital signs data is still not obtained, the AN j The voice reminds the ward to check the wireless terminal device and proceed to step (6); If negative feedback is obtained from the ward, relevant processing is performed according to the different feedback contents, and then step (6) is executed; (5) The aggregation node analyzes the location of the guardian in real time according to the active positioning algorithm in the data processing unit and stores it in the fingerprint database; then, it broadcasts and switches to the passive positioning mode and continues to execute step (7); (6) The aggregation node determines whether the data storage in the fingerprint database has reached the standard for independent passive positioning. If it has reached the standard, it broadcasts and switches to the passive mode and continues to execute step (7). Otherwise, it adopts the active positioning mode and returns to step (2). (7) The aggregation node calls the anchor nodes in turn. Each anchor node exchanges information with all other anchor nodes except itself, collects data such as received signal strength indication RSSI, channel state information CSI or channel impulse response CIR, and packages the data and transmits it to the aggregation node; (8) The aggregation node determines whether the data storage in the fingerprint database meets the standard for independent passive positioning. If not, the system switches to active positioning mode; otherwise, the passive positioning algorithm in the data processing unit is used to parse and estimate the location of the guardian in real time, and the corresponding data value of this round is stored in the fingerprint database; (9) The aggregation node determines the time interval between the last effective execution of the active positioning mode and the current passive positioning process, and takes corresponding reminders to the guardian according to the time interval; (10) The summary node determines whether the position of the guardian has changed since the last measurement; If it happens, the system switches to the active positioning mode; otherwise, continue to determine whether the relative static time of the guardian's position exceeds the set time. If it exceeds, execute step (11). Otherwise, further determine whether the effective proportion R of the vital sign data corresponding to the position of the previous round of active positioning analysis meets the set standard. If it meets the standard, the system switches to the active positioning mode. If it does not meet the standard, execute step (11). If positive feedback is obtained, the system switches to the active positioning mode; if negative feedback is obtained, it is processed according to the feedback content. (11) The aggregation node filters and calls the anchor node AN that is closest to the guardian. j , send a voice inquiry to the guardian and wait for the guardian's voice feedback to check the guardian's status; if positive feedback is received, the system switches to active positioning mode; if negative feedback is received, relevant processing is performed according to different feedback contents; and then it switches to active positioning mode to achieve real-time monitoring.

9. The method according to claim 8, characterized in that: The steps (4) and (11) described in the related processing according to different feedback contents specifically refer to taking corresponding actions according to the negative feedback contents obtained from the ward, including reminding to charge or put on the device again, repeating the inquiry and raising the volume, notifying the ward's community, and notifying the guardian to take measures.

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