WiFi-based real-time positioning and monitoring system for intelligent elderly care community
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1. Program objectives
The project is a Wi-Fi-based wireless local area network real-time positioning and tracking management system, which combines the latest Internet of Things, wireless local area network (WLAN), and real-time positioning and other technologies, in the space of the elderly community (indoor or outdoor), Realize complex personnel positioning, monitoring and tracking tasks, and accurately find the target object. This system will combine consumption, access control, and health management systems to realize the all-in-one card function, making the life of the elderly in the community more intelligent, and realizing humanized and intelligent monitoring of the elderly.
2. Advantages of WiFi solution
1) International standard protocol: adopt the international standard IEEE802.11b/g/n protocol
2) Highest security: support WEP/WPA/WPA2 and other international standard encryption methods; tags support digital encryption technology; internal and external networks can transfer location information through a gatekeeper to ensure internal network security.
3) Fast transmission rate: 300Mb per second, far exceeding 4G rate
4) Positioning accuracy: high positioning accuracy, up to 3-5M, accurate positioning to each room.
5) Label low power consumption: The label has ultra-low power consumption, can replace the battery or charge, and is safe to the human body without radiation hazard;
6) One network with multiple functions: powerful extension function, WiFi network conveniently realizes multiple functions such as video, voice, positioning, etc. The network has strong compatibility, and the existing network wiring can be used to avoid repeated construction of the network.
7) Simple construction: the existing network wiring can be used, and the AP can also be wirelessly connected, making the construction simple and convenient.
3. Scheme design
3.1 Design principles
The design of the entire system scheme runs through the following principles:
When designing the entire system, the starting point is advanced technology, reasonable architecture, mainstream products, low cost, and low maintenance.
Technological advancement: The design of the entire system, the choice of technology, and the configuration of software and hardware equipment should all comply with the high-tech trend. The world’s leading Wi-Fi RTLS technology should be adopted to maintain the technological advancement of the entire project in the next 5 years.
The overall design of the design: from the perspective of the informationization of the entire elderly care community, make the system an organic part of the basic information service system of the elderly care community; make full use of the existing relevant network facilities and IT resources, and carry out the relevant IT system when necessary Data sharing, avoid information islands, and avoid duplication of construction.
The rationality of the architecture: the use of advanced and mature technology to structure each subsystem can make it run safely and smoothly, effectively eliminate the bottleneck that may occur in each system, and ensure that each subsystem has good scalability through appropriate equipment.
Stability: The system is based on a stable, safe, and confidential large-scale database to ensure the normal operation of the system. It has a complete management system such as good data sharing, real-time fault repair, and real-time backup. Security: The system adopts international standard wireless encryption methods such as WEP, WPA, WPA2, and the label supports digital encryption technology, which has high security.
Product mainstream: When selecting equipment, it is mainly based on the actual situation of the positioning environment and various products on the market to select products with the best performance-to-price ratio and expansion capabilities. Low cost and low maintenance: The products used should be simple, easy to operate, and easy to maintain.
Compatibility: All systems are relatively open systems. Different products have standard interfaces and provide multiple communication standard protocols, which can facilitate the access of third-party equipment.
Modularization: the establishment of various sub-systems up to the overall system strictly implement the modular structure to meet the needs of system function expansion, replacement and maintenance of operating equipment, and ensure the efficient and reliable operation of the system.
Scalability: Using object-oriented and modular development technology, software and hardware modules with other functions can be expanded at any time as needed, with good scalability.
Centralized management: Each sub-system is centralized in the center for unified control, and implements the control and setting of all remote devices to ensure that the system performs its management functions efficiently, orderly, and reliably.
Upgrade and maintenance: Considering the actual needs of the system for increasing and modifying the capacity and functions in the future, the positioning system can be upgraded to the software, and the operation is simple, and the operation can be completed by the system administrator, without the need for complicated operations and specialized techniques.
3.2 Technical advantages
The technical team of Xinhui IOT combines various technologies such as radio frequency signal optimization, multiple positioning algorithm integration, electronic map data analysis and generation, and software platform architecture optimization. It has independently developed a WiFi real-time positioning system for more than ten years. The core technology of the system’s positioning engine has obtained a number of national invention patents and software copyrights, and has been continuously improved through hundreds of actual cases. It has the characteristics of high accuracy, strong interference, good stability, and strong scalability, reaching the international leading level. .
The real-time positioning system of Xinhui IoT has the following advantages:
-High positioning accuracy: It can achieve positioning accuracy of 3-5 meters, which fully meets the positioning needs of nursing home personnel;
-Multiple positioning algorithms: Support a variety of positioning algorithms, including triangulation, wireless fingerprint positioning, round-trip time positioning, self-organizing network positioning, combined with historical trajectory analysis and scene structure analysis to improve positioning accuracy and stability;
-Customized calculation: You can set the running trajectory according to different environmental locations to increase the positioning accuracy and stability, without passing through walls or jumping floors;
-Strong adaptability: It can automatically determine the WiFi chip manufacturers of different terminals and human interference, automatically adjust the positioning parameters, and increase the positioning accuracy and stability;
-The number of positioning can be expanded: a single positioning engine can locate 2000 terminal devices at the same time within 1 second, adopting a distributed architecture, can support multiple positioning engines at the same time, and manage millions of terminal devices;
-Support any WiFi terminal device positioning: the positioning engine supports both AP active scan mode and terminal scan mode. Although Apple’s iOS7 prohibits APP from obtaining the WiFi MAC address, our unique solution can realize iOS device positioning, and it is supported on iOS devices The function of pushing information according to the MAC address;
-Support WiFi tags: Support one-way transmission of ultra-low power WiFi location tags, wristbands, WiFi sensors, to achieve tracking and status monitoring of people and objects;
-Support cloud computing: the location AP of any place can be transmitted to the cloud server via the Internet;
-Many cooperative AP manufacturers: The equipment of mainstream AP manufacturers at home and abroad supports our positioning engine;
-Integrated one-card: Integrate personnel positioning, consumption, access control, video surveillance, physical examination and health management, out-of-bed alarm and other systems in one to realize intelligent one-card services;
-Abundant actual operations: The company’s successful WiFi positioning cases in China include nursing homes, exhibition halls, office buildings, factories, ports, prisons, coal mines and other industries in various complex environments;
3.3 Design requirements
The Wi-Fi-based real-time positioning and tracking management system for the elderly community is a safe, reliable, technologically advanced, stable operation, and high-performance information system. In addition to meeting all the software and hardware functional requirements described in this document, it should also be able to To meet the performance requirements brought about by business growth within 5 years, the construction of the system should meet the following basic requirements:
1. The technology adopted should be the mainstream technology in the industry and possess certain development potential.
2. It should have 7×24 hours of working stability.
3. It has good scalability to meet the ever-changing business support in the future.
4. Strict security management should be carried out on the stored and processed data to ensure the reliability, confidentiality, consistency and non-repudiation of the data.
5. Develop a reasonable and reasonable plan based on the business characteristics of community service and management for the elderly.
3.4 Network structure
According to the business development strategy and actual needs of the senior care community, based on the overall framework of the information system of the senior care community, the technical architecture of the Wi-Fi-based real-time location tracking management system for the senior care community is planned. The positioning-based wireless local area network is different from the general communication network. It requires that more than 3 AP signals can be received at any location, and the RSSI value of the signal should not be less than -70dBM.
3.5 System composition
The real-time location tracking management system is mainly composed of three parts: location tag, AP locator and back-end management center (location server software, etc.):
-The location tag is worn on the person as a wireless data collection module, and the system can track and locate the person and assets by tracking the tag. The positioning label must have the function of being scanned by the designated AP locator, and this function must be verified on site by the bid evaluation committee. The technical indicators of those who fail the verification do not meet the requirements.
-The AP locator must use the 2.4GHz frequency band, support 802.11b/g mode, support scanning and collecting tag information, and transmit it to the back-end management center to control and manage the location tag.
-The back-end management center is installed with the location tracking management system, which mainly realizes the analysis and processing of real-time data. Analyze and manage tag data, monitor and display the location of each field tag in time through the electronic map of the management center. The data can be stored in the storage database at the same time. Movement trajectory in a period of time, etc.
3.6 Overall function
The Wi-Fi-based real-time positioning and tracking management system for the elderly community is mainly based on Wi-Fi wireless network real-time positioning to realize dynamic and real-time tracking management of relevant personnel in the museum, especially personnel.
-Realize real-time positioning and tracking management of personnel in the elderly care community. The overall indoor accuracy is required to be within 5 meters, the key supervision area is required to be within 3 meters, and each household is located, and the outdoor area is located;
-The positioning tag is equipped with an active alarm function. When personnel encounter difficulties or emergencies in the area, they can actively alert the staff to prevent various safety hazards;
-The personnel positioning tag has a binding function, which can realize the binding of the managed personnel. When the monitored personnel walk out of the area, they can alarm to know the accurate position in time;
-Set up an early warning mechanism for entering and exiting special areas. If designated groups of people enter or leave the designated area, the system will actively alarm to prevent unknowingly or otherwise unknowingly or otherwise the adverse consequences of people and other personnel visiting or walking beyond the area;
-Historical track playback provides a record of all tagged walking routes;
-On-duty management of medical staff on duty, which can monitor the time and line of medical staff on duty in real time to prevent the occurrence of off-duty and other situations during the on-duty process, so as to facilitate the assessment of the working conditions of employees;
-The positioning tracking time is adjustable, and the fastest positioning time is 2 seconds;
-Realize regional stay time statistics;
-Can lock and track specific people;
-The positioning network can also be used for other purposes such as Internet access, voice, video, etc., but it is necessary to ensure that the network is not congested and does not affect the positioning effect;
-A visual terminal platform that displays the location and movement trajectory of people or objects in the form of an electronic map; the electronic map requires functions such as zooming, and can switch floors.
-Video linkage, the system according to the location of the positioning target, combined with security or other monitoring systems, can adjust the camera near the location of the positioning target to perform video tracking as needed. Need to carry out secondary development to support the existing video system.
3.7 Positioning engine
The system integrates advanced Wi-Fi wireless network-based positioning engine technology to achieve corresponding tracking management functions.
-Support 2.4GHZ Wi-Fi wireless network, positioning work mode supports RSSI mode;
-The maximum number of label management is more than 10,000;
-The maximum number of tags processed at the same time is more than 1000;
-Provide API interface and location tracking software to realize data exchange;
-The positioning accuracy is less than or equal to 5 meters; the key areas require the positioning accuracy to be less than or equal to 3 meters;
-The existing AP and wireless network can be used for positioning data transmission;
-The fastest positioning response time: less than or equal to 2 seconds
-Scalable to support the positioning of other Wi-Fi devices (such as laptops, PDAs, Wi-Fi mobile phones, etc.);
3.8 Real-time location tracking management system software
The system language and display interface are Chinese, with a good human-computer interaction interface; visualized location display based on labels and electronic maps; software based on B/S mode;
3.9 System Integration
According to the planning of the smart elderly community for different projects, customized services can be provided, including:
The software management system for the internal management of nursing homes supports traditional old-age care models and high-end member operation models;
The health examination system for the elderly or members supports cloud data management and remote monitoring;
One card system integration, such as identification, consumption, access control, positioning, health management, etc.
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