Method and device for locating underground personnel in coal mine

Abstract

The invention discloses a method for automatic location of underground personnel in the coal mine. The method is as below: (a) detecting current triaxial acceleration and triaxial angular velocity of an underground personnel as a location object on real-time basis, and detecting the magnetic field strength of a current location; (b) collecting the above data periodically, and calculating location information, including motion velocity and relative position, of the location object in each collecting period by using these detection data; and (c) transmitting the calculated location information through a Zigbee wireless network to a ground monitoring system for storage and real-time display, thus completing the location process on the underground personnel. In addition, the invention also discloses a corresponding automatic location device, and optimization schemes for the implementation of posture estimation on the location object and zero velocity correction processing. By the invention, personnel location with high accuracy and reliability can be achieved, and good application of Zigbee network in the coal mine environment can be given full play.

Description

technical field [0001] The invention belongs to the technical field of wireless communication positioning, and more specifically relates to a method and device for locating personnel in a coal mine underground. Background technique [0002] With the continuous development of the coal industry, the demand for production management and production safety of coal enterprises is also increasing. Among them, the effective positioning of underground personnel in coal mines is not only conducive to improving management quality, but also a reliable guarantee for safe production and accident rescue. Since the GPS signal cannot be received underground, the GPS system cannot be used to solve the problem of personnel positioning. At present, RFID positioning or Zigbee positioning is usually used to realize the positioning of underground personnel. Both of these positioning methods belong to wireless signal positioning. It is necessary to place positioning sensors at the passage openings ...

AI Technical Summary

Problems solved by technology

The algorithm of RFID positioning technology is simple, but it has the following disadvantages: its positioning accuracy is proportional to the placement density of the radio frequency card reader, and the cost of improving the accuracy is high; the reading speed of the radio frequency card is limited, and when multiple people pass the radio frequency card reader at the same time , there will be missed detection; in addition, the reading range of the RF card reader is limited, the direction of the RF card and the antenna placement of the RF card reader need to meet a certain matching relationship, and the flexibility is low

However, due to the complex underground environment, numerous interference sources, and large fluctuations in signal strength, the accuracy of the correspondence between signal strength and distance is low, resulting in instability of the final positioning effect

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