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1 System Overview
The core identification equipment of underground personnel positioning and attendance systemRFIDRadio frequency identification adopts the most advanced 0.18uM microwave chip technology today, and adopts the working mode of active identification of 2.4GHz working frequency. Compared with the original microwave identification technology, its performance has been substantially improved, and it has completely solved the long-distance, The identification and data transmission problems of large-flow, ultra-low power consumption, and high-speed moving markers also solve the fatal weakness of low-frequency electromagnetic wave technology with short sensing distance and poor anti-collision capabilities.
The underground personnel positioning and attendance system can timely and accurately reflect the dynamics of personnel and equipment in various areas of the underground to the ground computer system, so that managers can grasp the distribution of underground personnel and equipment and the movement trajectory of each miner at any time, so as to facilitate More reasonable scheduling management. When an accident occurs, rescuers can also quickly understand the location of relevant personnel based on the data and graphics provided by the underground personnel positioning and attendance system, and take corresponding rescue measures in time to improve the efficiency of emergency rescue work.
The downhole personnel positioning and attendance system is a comprehensive application system integrating daily management, personnel attendance, tracking and positioning, and post-disaster first aid. It integrates the most advanced products and technologies such as domestic advanced identification technology, transmission technology, and software technology. The domestically most advanced technology, the most stable operation, and the most professionally designed underground personnel positioning system. The realization of this scientific and technological achievement will bring new opportunities for the safety production and daily management of coal mine enterprises as well as emergency first aid.
1.1 System composition
Underground personnel positioning and attendance system equipment mainly includes: central station host, data communication box, substation, wireless identification sensors for coal mines, and wireless identification cards for coal mines.
1.2 working principle
First of all, place a certain number of wireless card readers for coal mines in the areas and roadways where people need to be tracked in the underground according to the specific needs of the site. The wireless card readers for coal mines are connected to the ground computer through the transmission bus, and at the same time, the substations and the coal mines are wirelessly read. The card connector is connected to provide working power. In this way, a system is set up in which the underground computer connects the underground wireless identification sensor through the optical fiber.
The downhole personnel who need to track and locate personnel each wear a wireless identification card. When the downhole personnel enter the underground, as long as they pass or approach any coal mine wireless card reader placed in the tunnel, the coal mine wireless card reader will immediately Sensing the information on the wireless identification card, and uploading the card number to the central station host, so that the central station host’s software can determine the specific information of the person through the database system (such as: who, job position, location, specific time ), and it can be displayed graphically on the computer screen of the control center at the same time.
The manager can view a certain area according to the distribution diagram on the computer, and the computer will count and display the personnel in this area. The central station host computer will sort out various attendance reports of each underground worker in this period according to the personnel access information for a period of time.
1.3 System characteristics
The system has the characteristics of long transmission distance, no “blind spots” in recognition, strong signal penetration ability, no electromagnetic pollution to the human body, strong environmental adaptability, convenient network connection remote monitoring, fault self-diagnosis, etc., so that the mine can truly realize the full automation of underground personnel The goal of safety management.
Zero missed/misread
The system uses advanced and reliable wireless communication interaction between the wireless encoding transmitter and the acquisition controller to ensure that when batch personnel pass the acquisition controller at the same time, there will be no missed or misreading situations, and the accuracy of the data is guaranteed .
Multi-user browsing and networking capabilities
The system software adopts the B/S network architecture, which can assign multiple users with different permissions. The client does not need to install any programs, and you can browse and understand related information on the network terminal.
Automatic attendance and well identity verification
Realize the automatic attendance of personnel entering and exiting the well. And through the identity verification function of the well, it ensures the uniqueness of the identity of the personnel who enters the well, and eliminates the phenomenon of personnel replacement and illegal entry into the well, especially the effective management of the change of the outsourcing team personnel.
Simple installation and debugging, easy to maintain and manage
For underground operators, no training and special requirements are required, and it is easy to operate and be accepted by operators.
Two-way information call function to meet the needs of mine comprehensive management
The system can send call information to the target, such as general call, emergency call, evacuation call, etc.; it can call a specific target or multiple targets (group call); the information can be communicated to everyone at the first moment, Realize real-time information transmission. In an emergency, underground personnel can also send a distress signal to the system through a portable card, so as to obtain timely help from other personnel.
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