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The mining industry in South Africa is using RFID for tracking lighting, rescue, Biss detection and first aid equipment, and is using the locally developed dual-frequency (DF) RFID, which was invented by IPico in Pretoria.
IPico’s iP-XTM dual-frequency RFID uses low-frequency radiation and high-frequency RFID with high-speed data transmission capabilities. The advantage is that multiple tags can be read in crowded places with good accuracy, fast reading speed and greater reading distance. Dual-frequency tags and readers are ideal tools for ten free-flowing people or objects that require accurate time determination, such as entry management, timekeeping and attendance systems, item loss and anti-theft devices, etc. ICI have a good performance.
The reading speed of dual-frequency tags is up to 10ms, as long as a standard single-antenna reader is used. Large-scale local coal mines require automatic processing systems that can generate reliable management information in real time.
The T/T underground personnel tracking system developed by the Australian Mining Technology Company uses RFID to track and locate underground personnel and equipment, and grasp the dynamic information of every worker in the underground, the electronic tag equipment and the location in the underground in real time. Distribution situation; especially during accident rescue, the distribution situation and accurate location of underground personnel can be timely and accurately understood, so that the rescue work can achieve clear targets, accurate positioning, and strong pertinence.
The main function of the system: Under normal operation, it can understand the working position of the underground operator; in an emergency, it can send alarms and emergency instructions to the operator to guide the evacuation, and at the same time, it can receive the location information sent by the underground operator. People who are trapped and unable to move can be rescued one by one; the working status of various sensors can be monitored in real time, and the underground environment can be grasped.
The system consists of three parts: electronic tracker (one-way and two-way, which can be placed on the helmet cover of each operator, and send the transceiver number and location information to the base station regularly. The two-way tracker also returns Can receive ground emergency indication signals); signal base station (monitoring the location of operators through communication with electronic trackers, and forming a underground wireless tracking and monitoring network with other base stations); monitoring and control equipment (used to control all base stations and the ground) Since the connection with other communication equipment).
The system is a wireless communication positioning system based on underground personnel monitoring. The signal base station will collect data from the electronic transceivers in its coverage area at a certain time interval (such as 100s, which can be set), and transmit the position signal of each person to the ground monitoring center, so that the manager can effectively grasp the situation. . When an emergency occurs, ground personnel can send instructions to underground operators, and operators can understand the instructions according to the speed and number of flashes of the lights of the electronic transceiver. The coverage area of the base station is within a radius of 50m. With the expansion of underground mining area, the number of base stations can be gradually increased.
The characteristic of this system is that it does not rely entirely on the production power supply system, and can support normal communication for a long time when the power fails; complete wireless communication; two-way real-time communication; monitor the location of personnel; monitor the soil conditions of sensors; small size and cost Low; strong fault tolerance, high reliability; advanced technology, obtained multiple benefits; wide application), obtained technical appraisal from the mining departments of the United States, Canada, and Australia, and has been used in multiple coal mines; easy to expand and maintain; can be used with Compatible with other underground management systems, such as SQL and Citec.
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