Underground personnel positioning system and method based on radio frequency identification technology

Abstract

The invention discloses an underground personnel positioning system based on a radio frequency identification technology. The system comprises tag card readers, electronic tags, a switch, an upper personal computer (PC), a central display screen and optical fibers; at least three tag card readers are arranged in underground laneways and are connected with the electronic tags which are worn by underground personnel through radio frequency electromagnetic waves; the conventional ranging algorithm is improved by adopting an electromagnetic wave propagation model and an attenuation index which are in accordance with an underground environment; distance between the underground personnel and each tag card reader is measured accurately by an improved ranging algorithm by the tag card readers; measurement results are transmitted to the ground upper PC after being collected by the switch; coordinate positions of the underground personnel are determined accurately by a trilateral positioning method according to the distance value of every three same identifiers by the upper PC; a positioning result is displayed on the central display screen in real time; and position reference is provided for ground management personnel and personnel who is about to go down for operating. By the improved system and the improved algorithm, the problem of coal mine underground positioning difficulties is solved effectively.

Description

technical field [0001] The invention relates to a radio frequency communication positioning system and an algorithm, in particular to a radio frequency identification technology-based system and algorithm for determining the location of underground personnel, belonging to the technical field of measurement and positioning. The positioning system includes tag readers, electronic tags, switches, host computer PCs, central display screens and optical fibers. Background technique [0002] Research on emergency measures for mine frequent events such as gas explosions and underground water seepage has always been the focus of people's attention. How to quickly and accurately determine the location of underground trapped personnel within a limited time after an accident occurs is an urgent problem to be solved. Radio Frequency Identification (RFID) technology stands out from many positioning technologies with its advantages of high sensitivity, non-line-of-sight and non-contact, lo...

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Problems solved by technology

[0006] In order to overcome the shortcomings of the existing underground radio frequency identification positioning system and method, such as low measurement accuracy, poor robustness, and small measurement range, the present invention provides a radio frequency communication positioning system and algorithm, specifically a radio frequency identification technology-based measurement of underground The system and algorithm of personnel position are optimized by using high-speed digital signal processing chips, adding anti-collision processing mode, placing the tag reader in a metal protective shell, and using multiple antennas in the tag reader RF module. ; The algorithm is improved to use the electromagnetic wave propagation model and attenuation index that are more in line with the underground environment to accurately calculate the distance between the tag reader and the electronic tag worn by the personnel, and use the trilateral positioning method to accurately obtain the location coordinates of the underground personnel, greatly improving the positioning accuracy

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