RFID and WiFi underground personnel positioning system

With the rapid development of the country's economic construction, various industries have an increasing demand for resources such as coal and metals. The underground safety production situation is severe and they are facing greater pressure. Major disasters and casualties in mines occur from time to time. The life safety of all types of underground workers is seriously affected. are seriously threatened, therefore, the underground personnel positioning system is particularly important.

Problems with the current underground personnel positioning system

In recent years, large and medium-sized coal mines at home and abroad have successively completed the construction of underground personnel positioning systems. However, traditional underground positioning technologies such as RFID and Zigbee have also exposed some problems. For example, RFID is strictly an attendance identification system, not a real positioning system. It is regionally positioned and not cost-effective. The Zigbee positioning system has a low transmission rate and does not meet the needs of multiple services.

At present, most underground positioning systems have relatively single functions and are dedicated to private networks. They cannot simultaneously meet the basic needs of mining enterprises such as personnel positioning, mobile phone calls, real-time data transmission, and video monitoring. These are precisely the important guarantees for achieving safe underground production.

Failure, repeated construction of multiple systems makes the cost of underground systems higher. How to improve the informatization level of underground mines and improve the traditional underground personnel positioning and environmental monitoring models? Anhui's underground positioning project has put forward their requirements to us. This is also a concern of all mining companies.

The comprehensive underground mine solution based on Wi-Fi wireless technology is directly tailored to address the above problems. Through the international standard IEEE802.11, the integration of wireless communications, personnel positioning, environmental monitoring, wireless video surveillance and other services is realized, while other solutions require the deployment of two or more networks.

  Our advantage

Wide signal coverage: Wi-Fi coverage can reach 100 meters indoors and 300 meters to several kilometers outdoors.

High positioning accuracy: WiFi positioning accuracy can reach up to 3-5M, fully meeting the positioning needs of underground surfaces.

Fast transmission speed: can reach 200Mb/second, the latest standard supports IGb/second transmission rate. It can support multiple high-definition videos and is in line with the trend of personal information development.

Ultra-high cost performance: The WiFi positioning system can be expanded to implement multiple business functions such as voice calls, video transmission, and sensing, making one network multi-purpose.

Simple networking: Wireless terminals and positioning APs can meet the positioning configuration, so that network resources can be shared in wireless mode with the existing wired architecture, and the installation costs and complex procedures are far lower than traditional wired networks.

Diversified terminals: Positioning terminals are diverse. In addition to traditional positioning tags, the system supports positioning of smart terminals such as WiFi phones, laptops, WiFi cameras, and iPADs to meet mobile business needs.

Rich experience: The first brand in the domestic WiFi positioning market, with more than 100 successful cases at home and abroad, and rich project experience.

System composition

The underground personnel real-time positioning supervision system (Wi-Fi RTLS) consists of three parts: positioning tag (Wi-Fi Tag), wireless LAN access point (Access Point), and positioning server (Locating Server).

The wireless LAN real-time positioning system mainly consists of positioning tags, AP locators and back-end monitoring and management

(Positioning server) consists of three parts:

1) WiFi positioning tag: The positioning tag is worn on each worker as a wireless data collection module. The system tracks and locates people and vehicles by tracking the tag.

2) AP locator: uses the 2.4GHz frequency band, supports 802. llb/g/n mode, collects tag information in a timely manner, and transmits it to the back-end monitoring center to control and manage underground tag equipment. The effective coverage range of each AP base station underground is 100 meters, and the effective accuracy for tags is 5 meters.

3) Positioning server: A monitoring and management center equipped with a positioning server software system, which mainly implements real-time data analysis and processing. Analyze and manage tag data, monitor and promptly display the location of each on-site tag through the electronic map of the control center, the data can be Stored in the storage database at the same time, and monitoring personnel can access the storage server through the computer to query the location of personnel.

  The main function

◆ Real-time positioning: The visual interface displays the location of underground personnel on a map in web form and moves them in real time

◆ Query function: The system provides query by person; query by time; query by region; query by identification area; query by timeout alarm; query by overcrowding alarm; query by alarm by restricted area; query by alarm by work abnormality; query by personnel classification; Query by department; query by type of work, etc.

◆ Statistical function: Provide various practical statistical data in the form of reports, such as various warning records of labels, personnel entry and exit records, operation history records, etc.

◆ Real-time alarm: In the event of a danger, underground workers can touch the label button for real-time alarm. The system will pop up a page to provide an audible alarm and predict the danger in advance.

◆ Trajectory playback: Play back the historical movement trajectory of a specific person who is targeted in a specific time period for various analyses.

◆ Alarm management: Manage actual alarms such as button alarms, disappearance alarms, low battery alarms, and cross-border alarms, and provide subsequent response methods for various alarm situations. Otherwise, the alarm will continue to remind you until it is processed.

◆ Attendance management: record the entry and exit time and stay time of each person working in the well, forming a complete intelligent attendance record

◆ Video linkage: When a dangerous situation occurs underground, the system will pop up nearby cameras immediately, retrieve images, and understand the dynamics of the scene in the shortest possible time.

◆ System management: system maintenance, log query, data import, data export, data backup, data scalable implementation

◆ WiFi calling: Make use of underground WiFi signals to make high-quality WiFi calls without incurring any fees. It is safe and reliable and supports intercom, group calling, text messaging and other functions.

◆ Environmental monitoring: In conjunction with environmental monitoring sensors, sensitive data such as underground dangerous gas concentration, wind speed, temperature and humidity can be monitored.

◆ Video transmission: Utilize the high bandwidth of WiFi network to realize WiFi video signal transmission