Downhole multifunctional personnel location distress system

Abstract

The invention discloses a downhole multifunctional personnel location distress system which comprises a location server, a monitoring terminal, a wire communication subsystem, wireless communication base stations and a distress calling device. The wire communication subsystem mainly comprises optical fibers, an optical splitter and a wireless switch. Each wireless communication base station comprises an explosion-proof box, a power supply, a standby battery, a wireless access device, an antenna isolator and antennas. The distress calling device comprises an acquisition subsystem, a location subsystem, a communication subsystem, a display subsystem, a control subsystem and a storage subsystem. The wireless communication base stations are arranged in the pit at intervals and are connected with the wireless switch and the location server through the optical fibers. The distress calling device and the wireless communication base stations are in bidirectional communication based on a wireless mode. The distress calling device can be located accurately. The downhole multifunctional personnel location distress system can be used to monitor a person using the distress calling device, has multiple distress calling functions, can support search-and-rescue when existing communication facilities are damaged and do not work, and is a synthetic system integrating mine personnel tracking and locating, dispatching management, and distress call and search-and-rescue after disasters.

Description

technical field [0001] The invention relates to an underground multifunctional personnel positioning and calling for help system. The invention specifically relates to technical fields such as wireless communication, wireless positioning, and signal processing. Background technique [0002] Downhole personnel positioning is an important measure for safe production. Over the years people have adopted various methods to detect the position of underground personnel. [0003] At present, the actual use is mainly based on radio frequency identification technology (RFID). RFID uses radio frequency to carry out non-contact two-way communication to achieve the purpose of identification and exchange data. Different from other contact identification technologies, the RFID system can realize automatic identification and position monitoring of people or objects in different states without contact between the radio frequency card and the reader. A typical radio frequency identificatio...

AI Technical Summary

Problems solved by technology

[0004] 1. The positioning accuracy is low, and the positioning accuracy is limited by the distribution density of the readers. It can only achieve regional positioning, and cannot achieve accurate positioning with an error of a few meters;

[0005] 2. It is easy to miss reading, and due to the limitation of RFID reading and writing speed, it cannot handle the situation where multiple people pass through the card reading system at the same time.

[0007] 1. The transmission loss model of the wireless signal is greatly affected by the environment. Zigbee uses the field strength positioning algorithm, which is subject to large interference, so it is easy to cause inaccurate positioning;

[0008] 2. The hardware positioning engine inside the Zigbee communication chip is suitable for a plane positioning environment. The underground is mostly a linear environment composed of tunnels, which is different from the plane positioning environment in an open space, and there are problems in practical application;

[0009] 3. Existing positioning systems and positioning devices cannot detect the activity status of the device wearer;

[0010] 4. The Zigbee wireless communication distance is short, which cannot meet the system communication requirements of long-span underground, and there are difficulties in the implementation of specific projects

[0011] The existing positioning system has a single function. When an accident occurs underground, people are trapped, or the communication system fails or is paralyzed, the existing positioning terminal equipment cannot automatically call for help, and cannot provide the functional support required for rescue in real time.

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