1、Study on the Technology of the Coal Mining Safety Monitoring SystemAbstractNew development and application of the wireless radio frequency make the application of the RFID (Radio Frequency Identification) technology become more and more extensively, and combining the characteristics of RFID technolo
2、gy with the mine, we established an underground safety monitoring system with integrality, real-time and flexibility, which could automatically alarm when dangers happen and enhance the search and rescue efficiency. The system could manage the harm-gas concentration, planning arrangement of workers,
3、 access control for the works passing in and out laneway, distribution of laneway personnel and workers data, realize the informationization and visualization of the underground management, and enhance the mining production management level and the work safety level of the mine.Keywords: RFID, Safet
4、y monitoring system, E-tag, Reader-writerMining accidents often happened in China in recent years, and except for mine owners weak safety and legal consciousness, the lagged safety establishments and the imperfect managements of the mining personnel and equipments were the important causes. Through
5、analyzing several extra serious accidents in the near period, following common problems generally existed (Qiu, 2007, P.28-29), (1) the information communication between the ground personnel and the underground was not timely, (2) ground personnel could not dynamically grasp the underground personne
6、ls distribution and operation situation, and could not exactly position underground personnel, (3) once the mine accident happened, the efficiency of rescue was low, and the effect was worse. Therefore, it is very important and urgent to exactly and quickly carry out the coal mining safety monitorin
7、g function (Liu, 2004, P.22-25 & Guo, 2005), effectively manage the miners, and ensure the high-efficiency operation of the rescue.The coal mining personnel and vehicle safety monitoring system proposed in the article can track, monitor and position the harmful gases, personnel and vehicles in the m
8、ine real time, and offer dynamic information about the mine laneway network, personal position, vehicle position, dangerous region and corresponding clews for ground personnel. If the accident happens, the system also can inquire about the personnel distribution, the personnel quantity, the personne
9、l withdrawal line to offer scientific references for the accident rescue from the monitoring computer. At the same time, the mangers can utilize the daily attendance function in the system to implement attendance management for miners.1. Introduction of the RFID technologyRFID (Zhou, 2006 & Nadeem R
10、aza, 1999) is a sort of non-contact automatic identification technology, and it can automatically identify the objective by the radio frequency signals, quickly track the goods and exchange data. The identification work needs not human operation, and can work under various severe environments. RFID
11、technology can identify high-speed objects and identify multiple tags simultaneously, and the operation is quick and simple. RFID technology was generated in the Second World War, and it is the successor of the traditional code technology, and its major core part is the E-tag, and the identification
12、 system could read the information stored in the E-tag through the radio waves emitted by the reader-writer from a few centimeters to a few meters, and identify the identity of the goods, people and objects represented by the E-tag.1.1 Composing of RFID systemRFID systemis generally composed by E-ta
13、g, reader-writer and computer communication network(Simson Garfinekel, 2005).1.1.1 E-tagE-tag stores correlative information of the identified objects, and it is usually put on the identified objects, and the information stored by it can be read and written by the radio frequency reader-writer throu
14、gh the non-contact mode.1.1.2 Reader-writerThe reader-writer is the equipment which can be used to read and write the information of the E-tag by the radio frequency technology. The tag information read by the reader-writer can be managed and transmitted by the computer network system.1.1.3 Computer
15、 communication networkIn the RFID system, the computer communication network is generally used to manage the data and complete the function of communication transmission. The reader-writer can connect with the computer communication network by the standard interface to realize the communication and
16、data transmission.1.2 Work principle of RFID systemRFID technology is a sort of non-contact information transfer mode realized by the radio frequency signals through space coupling (alternating magnetic field or electromagnetic field), and it identifies the objective through the transferred information. Its work principle can be described as follows (Klaus Finkenzeller, 2003): reader-writer emits energy in one region, form the electromagnetic field, a
