Down-hole remote locating method and system based on beam forming

Abstract

The invention discloses a down-hole remote locating method and a system based on the beam forming. The down-hole remote locating method the beam forming includes transmitting sound signals; collecting sound signals; processing sound signals by a processing unit, wherein the sound signal processing specifically comprises beam forming stacking; spectral analysis and characteristic signal extraction; determining time differences of characteristic signals arriving at a signal collection unit; and calculating a located position according to the arrival time differences. According to the locating method, used sound signals utilize roadway metal structures as communication media, the penetrating capability is high, the propagation distance is far, and erecting of base stations is avoided. A beam forming technology is used for processing the sound signals, so that the signal to noise ratio of the sound signals is enhanced. According to the down-hole remote locating method and the system based on the beam forming, the locating accuracy is high, the reliability is high, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of mine personnel positioning search and rescue, in particular to an underground remote positioning method and system based on beamforming. Background technique [0002] The safety of coal mine production and the search and rescue of people trapped underground after mining accidents are a crucial issue in the production process of the coal mine industry. Because coal mines are distributed tens to hundreds of meters underground, and the tunnels extend hundreds to several kilometers, the special environment of coal mines makes communication between the underground and the ground extremely difficult. Once gas explosions, landslides, water seepage and other accidents occur in the mine, the underground situation cannot be transmitted to the ground, and the search and rescue personnel cannot obtain the exact location of the trapped people, so the disaster relief work cannot be carried out effectively. [0003] Th...

AI Technical Summary

Problems solved by technology

[0004] The existing positioning search and rescue technology for people trapped underground relies heavily on wireless signals (RFID, WiFi, and ZigBee) and wireless / sensor networks throughout the underground, and has the following technical defects: 1. Low positioning accuracy

Wireless signals are easily affected by signal distortion, attenuation and multipath effects when transmitted in roadways with rock and mine structures, and the transmission distance is greatly reduced. In the case of curved roadways, the non-line-of-sight distance of wireless signals is less than 10 meters

2. Low reliability

3. High cost

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