Wireless sensor network node device used in underground coal mine

Abstract

The invention discloses a wireless sensor network node device used in an underground coal mine, which belongs to a hardware platform for personnel positioning and environmental monitoring based on a wireless sensor network in the underground coal mine. The wireless sensor network node device used in the underground coal mine is provided with wireless sensor fixed nodes (1) and wireless sensor mobile nodes (2); the sensor fixed nodes (1) are placed on a tunnel wall from space to space in the underground coal mine; and the sensor mobile nodes (2) are worn by mining personnel. The device has the following advantages: 1) the device has high positioning accuracy, and the mobile nodes carried by the personnel transmit wireless signals to communicate the approaching fixed nodes so as to determine the position of the device and improve the positioning precision; 2) both the wireless sensor fixed nodes and the wireless sensor mobile nodes have the capacity of bidirectional communication so as to accurately position the position of the personnel; 3) the design cost of the wireless sensor nodes is comparatively low, large amount of nodes can be arranged, and drain regions and blind points of positioning and monitoring are avoided; and 4) the arranged wireless sensor fixed nodes do not need wire connection, so the cost is low.

Description

technical field [0001] The invention relates to a hardware platform for personnel positioning and environment monitoring based on a wireless sensor network in underground coal mines, in particular to an underground wireless sensor network node device in coal mines. Background technique [0002] The underground working environment of coal mine is a harsh environment with complex geological environment, various harmful gases and unknown water bodies escaping. Due to the high mobility of underground operators and the complex working environment, once an accident occurs, it is difficult to determine the exact number of underground personnel and the specific location of each person, which brings great difficulties to the rescue work and often delays the rescue. The best time, with serious consequences. [0003] At present, underground personnel generally use an underground personnel positioning system based on radio frequency technology. The underground personnel positioning sy...

AI Technical Summary

Problems solved by technology

The underground personnel positioning system based on radio frequency technology has played a certain role in the real-time monitoring of the underground personnel's position, but it is still in the exploratory stage and the application is not yet mature.

There are some following problems in this positioning system and method: 1) positioning accuracy is low

3) Due to the limitation of the underground environment of coal mines and the cost of radio frequency base stations, it is impossible to arrange many radio frequency base stations, so that the detection of personnel can only be discontinuous, and there are positioning leakage areas

4) A large number of identification sub-stations need to be arranged, and the identification sub-stations are mainly connected by wires, which makes wiring difficult and costly

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