In the era of the Internet of Everything, the value of data is further highlighted. Among the massive data, location data has become the basic coordinates in the Internet of Everything industry. The indoor space structure is becoming more and more complex, people's requirements for real-time and accuracy of location are constantly improving, and the demand for indoor positioning is also unprecedentedly high. The penetration of satellite signals to obstacles is weak, which makes such outdoor positioning systems unable to be used in indoor environments. And in the complex indoor environment, there are many factors that interfere with the positioning signal, which will reduce the positioning accuracy, such as high concentration of dust, obstacles, multi-path refraction caused by complex environment, humid environment, etc. As an extension of outdoor positioning technology, indoor positioning makes up for the shortcomings of traditional positioning technology. It has been widely used in smart medical care, smart factories, smart exhibition halls, smart shopping malls, parking lots, nursing homes and other scenarios to realize mobile personnel and assets. Real-time indoor positioning. In order to optimize services, large commercial supermarkets and airports have begun to use Bluetooth technology to provide reverse car search based on indoor location services, find specific locations, indoor navigation, etc.
Bluetooth indoor positioning solution
Bluetooth positioning is based on the RSSI (Received Signal Strength Indication, signal field strength indication) positioning principle. Bluetooth indoor technology is to use several Bluetooth LAN access points installed indoors to maintain the network as a basic network connection mode based on multi-users, and to ensure that the Bluetooth LAN access point is always the master device of the piconet, and then through the measurement signal Intensity obtains the user's location information . According to different positioning terminals, Bluetooth positioning methods are divided into network side positioning, terminal side positioning and active and passive integrated positioning .
Working principle of Bluetooth indoor positioning solution
- Personnel wear positioning badges that work in the broadcast state, and the positioning badges broadcast their own MAC address, battery power and other information in real time.
- The front-end positioning base station scans and collects the broadcast information of the positioning badge in real time, and transmits the relevant information to the dedicated positioning engine machine in the computer room of the sports center through the POE switch.
- The entered external data sources can be uniformly supervised and configured through the database server and monitoring console, and can be used as the source data source or the destination data source.
- Access and analysis of positioning data, the system can support positioning SDK and API for multiple terminals (such as smart phones, cards, vehicles, etc.), so as to obtain corresponding positioning original information and receive positioning results.
- The personnel information database is matched with the positioning badge, and the positioning engine runs the Bluetooth positioning algorithm to accurately calculate the positioning badge data information collected by the front-end positioning base station, and obtain the location information of the positioning badge.
- Combined with the 3D map of the sports center, the monitoring station will locate the position of the work card and display it on the large screen, and the current real-time position of the personnel can be viewed in real time.
Bluetooth indoor positioning solution function introduction
1. Ordinary visitor user positioning and navigation: When the user is in the Beacon coverage area, obtain the Beacon RSSI data in the scene through the mobile phone Bluetooth scanning authority, and obtain the user's current location through the ranging positioning algorithm; when the user is in the Bluetooth gateway coverage area, broadcast through the mobile phone The relevant protocol package collects relevant data through the Bluetooth gateway and uploads it to the server to locate the user's mobile phone, and finally sends the user's location information to the user's mobile phone for presentation.
2. Staff location management: When the work card is in the Beacon coverage area, scan the Beacon RSSI data in the scene through the work card, and then transmit the data to the positioning engine server through the LPWAN base station, and finally obtain the current position of the work card through the ranging positioning algorithm; When the work card is in the coverage area of the Bluetooth gateway, it will automatically switch to the broadcast mode. Through broadcasting related protocol packets, relevant data will be collected through the Bluetooth gateway and uploaded to the server for high-precision positioning of the work card, and finally the position of the work card will be displayed on the web management terminal.
Introduction to the Advantages of Bluetooth Indoor Positioning Solution
(1) High precision and low latency
Using Nordic nRF52 series high-quality chip solutions, Bluetooth beacons, personnel positioning badges and Bluetooth gateways have stable and reliable performance, and can be used together to achieve real-time accurate positioning of personnel.
Bluetooth beacon has the advantages of low power consumption, accurate positioning, and convenient indoor use. It also has the "letter" function of sending information and the "mark" function of marking the location. And because the Bluetooth beacon can send signals continuously, once the mobile phone user enters the signal coverage of the Bluetooth beacon, an automatic answering mechanism on the mobile phone can be formed, and the information receiving function can be realized without unnecessary manual operation by the user.
The emergence of Bluetooth gateways does bring more possibilities to the development and application of Bluetooth positioning application scenarios, real-time positioning system, low latency, easy secondary development, and an API for obtaining real-time positioning data.
(2) Advantages of software platform algorithm
The industry-leading multi-source fusion algorithm of Bluetooth beacons and Bluetooth gateways meets business system operation, location calculation, data analysis, data review, etc., and supports system expansion, which can fully adapt to changes in digital management requirements in the next three to five years.
(3) Remote synchronization
The built-in remote access engine of the system, with the support of third-party software, can realize the synchronous operation of the system in different places around the world, centralized data management, and the management system supports various mobile communication devices anytime and anywhere to realize mobile office.
(4) super compatible
Powerful underlying technology, supports various databases, seamlessly connects with various software systems, and supports various operating systems. The system has no special requirements for the computer configuration and network bandwidth required by the client, and does not require high hardware and network costs. Greatly reduce customer IT investment costs.
(5) Rapid deployment
Pure green system architecture, no need to write the operating system registry, only need to install the server, support WEB mode, WeChat applet login, avoid the problem of repeated installation due to operating system crashes.