High-precision personnel positioning application cases of six major mining systems

System Overview

The underground high-precision personnel positioning system is an information technology product that integrates multidisciplinary applications of computer software and hardware, information collection and processing, wireless data transmission, network data communication, automatic control and other technologies. The system is used to move long-distance underground mine tunnels Personnel conduct non-contact information collection to achieve automated collection and management of targets, enabling high-precision positioning management of personnel underground.

This system integrates the high-tech ZigBee technology and applies the wireless chip with the fastest transmission rate at present to achieve reliable wireless data communication. Equipment such as RFID Card reading substations and RFID personnel cards adopt intrinsically safe designs and are installed It is convenient, has long operating distance, has the characteristics of high-precision identification without blind areas, high signal security and confidentiality, no electromagnetic pollution to the human body, and strong environmental adaptability.

  System functions

The system has powerful and practical emergency rescue functions for underground personnel:

When people underground are in danger, they can trigger the "SOS" button, and the ground will immediately alert the police, and query and display who is asking for help, at what time, and where;

When there is danger in a certain area underground and people need to be evacuated, the ground dispatcher or system manager can send a group emergency evacuation notice to the people in the dangerous area underground, and the people underground can receive the "evacuation" signal in time through sound and indicator lights;

When the surface needs someone underground and notifies them to call back, a "call" signal can be sent on the surface. The underground personnel can receive the "call" signal in time through sound and indicator lights, and the underground personnel can call back to the surface.

The underground personnel can be tracked and monitored in real time, and their positions are automatically displayed.

It can accurately count the number of personnel underground in the entire mine and in a certain area (such as the working face).

It can track, query and print the number, activity trajectories and distribution of underground personnel currently and within a certain period of time in real time.

RFID card reading substation and RFID personnel positioning identification card have completely independent transmitting and receiving components, and their core technologies are composed of embedded microprocessors and embedded software.

The RFID personnel positioning identification card uses an advanced embedded microprocessor to realize encoding, decoding, communication and information collision processing and other functions under the control of embedded software.

The system has card checking and attendance functions. When workers pass through the wellhead, the card checking screen can detect whether the card is good or bad, and has a very powerful attendance management function.

The personnel positioning identification card adopts active working mode (independent power supply), ultra-low energy consumption design, one-time replacement of the battery, maintenance-free use for more than 1 year, and has an under-voltage indication function.

Card carriers can identify received commands through different light indicators. (two-way function)

The system has the function of automatically merging attendance when communication is interrupted to prevent personnel location data from being lost due to line failure causing communication interruption at the personnel station.

The system software has the battery management function of personnel identification card.

The system can reliably identify static or high-speed moving targets ≥15m/s.

A single target identifier can identify more than 300 RFID personnel identification cards at the same time.

Automatic identification function: Staff entering and exiting by car do not need to get off the vehicle. After the vehicle enters the monitoring area, the personnel positioning and attendance functions can be automatically completed.

There is no directionality, no blind spots in the recognition area, and no harm to the human body.

When the underground personnel positioning substation loses contact with the surface central station, the substation can still work independently and automatically Store personnel monitoring data. When communication is restored, the monitoring host can extract the data and automatically complete the data repair. The stored data is more than 2,000 pieces.

When the system collects real-time data, it can perform recording, display, query, editing, manual entry, network communication, etc.

RFID Access Control function: restrict employees from entering special areas underground in coal mines as needed. If an unauthorized person approaches the area, an audible and visual alarm signal will be sent out, and the ground monitoring host will also send out an alarm signal.

Alarm function: The entry and exit time and location of people going down the mine can be restricted. If the authorized time is exceeded or the unauthorized location is entered, the alarm equipment will be triggered to issue a warning, so that the control personnel can respond quickly and take safety measures.

The system can automatically generate a personnel information database, realize attendance statistics and management reports, and improve management efficiency.

Once a safety accident occurs in a mine, the monitoring center can know the basic conditions of the trapped persons as soon as possible to facilitate accident rescue work.

The system has the function of reproducing personnel activity trajectories.

The sub-station has personnel coding and independent clock display functions, and the detector can be used to query records.

  System Features

The fastest wireless speed and strong anti-interference ability: using the latest radio frequency chip, the air transmission is 1 megabit per second (1Mbps), which is the fastest among current RFID personnel positioning chips. This greatly reduces air collision and interference, and more It is conducive to applications in situations with a large number of people, and the technology is in the leading state in China.

High-precision identification area: The technical application of dual reception of personnel identification card signals using a card reading substation and a wireless receiver can effectively realize the positioning of high-precision personnel underground; different areas can set specific accuracy according to different requirements. .

Each sub-station can independently determine the entry and exit direction of personnel: using special technology, underground personnel can identify the entry and exit direction after passing through one sub-station, instead of the traditional need to pass through two sub-stations to identify personnel entry and exit. (This technology has been patented)

The sub-station has the function of wireless relay: the underground sub-station has the function of wireless transmission between sub-stations. The bus can be wired or wireless. Especially suitable for intersections and corners, signal conversion is very convenient. Created a new model of underground bus distribution.

Graphical software with rich functions: It adopts the combination of geographical information system GIS and SQL Server database, with pictures and texts. It is unique in terms of sub-station setting, sub-station movement and line layout. Substations can be dragged arbitrarily, and substations can be easily displayed (increased or decreased) according to the production progress of the mine.

It has a two-way calling function: the person above the mine can call the people underground, and when the people underground are in danger, they can call the people above the mine for help, which is of great significance for rescue and disaster relief.

Certification according to the latest safety standards: The system adopts the latest safety standard certification for personnel positioning standards. The functions are written according to the new requirements and are compatible with the functions of the personnel attendance system.

Self-detection of equipment failure: It has an automatic alarm function for equipment failure, making maintenance very convenient.

The system has the function of off-duty alarm: the key underground personnel (foreman, team leader, tile inspector, security inspector, stationed mine supervisor, etc.) off-duty alarm; underground work overtime alarm; alarm when entering dangerous areas or key protection areas; mine and mining Alarm for overcrowding in areas and work surfaces. Through off-duty alarms for different positions and regional conditions, mine production safety is ensured in real time.

The system has a gas mobile terminal-RFID detector: it can dynamically detect the gas concentration at various locations underground in real time, and transmit it to the sub-station through wireless transmission, and then transmit it to the host computer to display the gas concentration value in the host computer, which is a good complement to the fixed gas monitoring system.