Positioning and tracking system of underground/roadway moving object

Abstract

The invention discloses a positioning and tracking system of an underground / roadway moving object, comprising underground positioning and tracking systems distributed under a detected mine and ground monitoring systems distributed on the ground; two-way communication is conducted between the underground positioning and tracking system and the ground monitoring system; the underground positioning and tracking system comprises a plurality of wireless radio-frequency labels, a plurality of wireless signal receiving and transmitting devices and a plurality of card readers which are respectively carried by underground workers, are internally stored with the information of the identity and engaged job category information of a cardholder, can read the stored information in the wireless radio-frequency labels within respective signal coverage area in real time, and synchronously upload the read information and the internally-stored information to the card reader of the receiving and transmitting device; and the wireless radio-frequency labels are distributed on a coal mining work surface or a coal mining roadway. The positioning and tracking system has reasonable design, convenient installation and distribution, low cost, complete function and good use effect, and also improves the coverage area correspondingly while saving the cost.

Description

technical field [0001] The invention relates to a mobile object positioning and tracking system, in particular to an underground / roadway mobile object positioning and tracking system. Background technique [0002] In recent years, mine accidents have occurred frequently. Due to the complexity of the mine situation, the rescue work of miners is very difficult. If you can know the precise location of the workers in the mine in time at ordinary times, the casualty rate of the accident will be greatly reduced in the event of an accident. Therefore, the positioning of underground personnel has always been an urgent task in coal mining. Now researchers have proposed many solutions, mainly including RFID-based underground personnel positioning methods and PHS-based underground personnel positioning methods, etc., but Little success. [0003] Among them, the working principle of the underground personnel positioning method based on RFID is to use radio frequency identification tec...

AI Technical Summary

Problems solved by technology

However, the RFID-based underground personnel positioning method still has the following disadvantages: 1. Due to the limitation of the transmission distance, the coverage area of ​​these positioning systems in the underground is very limited, and the positioning information obtained can only indicate that the employee has been to this place for the last time, But now it is impossible to know where the employee is, so it is impossible to realize the real-time positioning and tracking of personnel; ②Because the RFID positioning card only actively sends its own ID number to the receiver in the activation area, without any other functions, so when an accident occurs In case of emergency, there is no way to communicate between the underground staff and the ground monitoring station; ③The positioning cannot reach the required accuracy range, and the most fundamental defect of RFID radio frequency technology is the lack of technical means to improve the positioning accuracy; ④The software of the existing system The positioning interface generally displays positioning information in the form of downhole schematic diagrams or tables, and it is difficult for monitoring personnel to have a more accurate understanding of the downhole situation

However, the PHS underground personnel positioning method still has the following disadvantages: ① The surrounding field strength information and specific algorithms sent by the locator or the positioning mobile phone can be located within a range of tens of meters, but cannot be accurately located; The PHS base station has a large ground coverage area, but the underground coverage is not ideal, and the signal cannot be covered in many places; ③PHS base station equipment and terminals are relatively expensive

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