A multifunctional communication node for mine emergency rescue

Abstract

This invention discloses a multi-functional communication node for emergency rescue in mines, comprising a power supply control unit, a CPU central control unit, a wireless transceiver unit, a network interface unit, and several positioning terminals. When a mine accident occurs, underground communication lines and facilities may suffer partial or complete damage, causing communication disruptions. In traditional mine search and rescue operations, to avoid secondary accidents, the underground power supply is completely cut off after a mine accident, and the power supply to communication lines and facilities is also cut off. The communication node of this invention can quickly establish an emergency rescue communication system information platform based on a composite cable of signal and power lines and a wireless self-organizing network. It can accurately assess the situation at the accident site, provide data support for on-site rescue command, ensure the orderly conduct of on-site rescue work, avoid casualties among rescue team members, and achieve safe rescue. This invention can also be applied to other emergency rescue sites besides mines, with a very broad application prospect.

Description

Technical Field

[0001] The invention belongs to the technical field of mine emergency rescue, and in particular relates to a multifunctional communication node for mine emergency rescue. Background Art

[0002] After a disaster accident in a mine, especially when a fire, gas outburst or explosion occurs, the air composition changes due to power outage at the accident site and the destruction of the ventilation system, which is no longer suitable for normal breathing. Underground communication lines and facilities may suffer partial or devastating damage, resulting in communication obstruction. The situation at the accident site can only be grasped by rescue team members wearing oxygen respirators who enter the disaster area for reconnaissance, accurately ascertain the nature, scope, number and location of people in distress and casualties, as well as ventilation, gas, dust, toxic and harmful gases, temperature and other conditions of the accident. The results of the reconnaissance are an important basis for the emergency command to fully understand the disaster and make correct decisions, and are also an important guarantee for the mine rescue team to fully understand the disaster and achieve safe rescue. After reconnaissance, timely positioning of the trapped miners' exact location is very necessary for search and rescue operations, which helps the rescue team to reach the correct location as soon as possible and save the precious lives of the trapped miners.

[0003] The following technical difficulties exist in the existing mine emergency rescue field: the existing sensors have poor adaptability in disaster environments, the information transmission capacity in the disaster area after an accident is not strong, the disaster warning system is not fully covered, and the disaster information response is not timely; the demand for communication frequency resources at the emergency rescue site is large, and the communication standards and communication modes between different communication equipment and emergency command communication management systems are incompatible; the rescue communication terminal has poor waterproof, explosion-proof and high-temperature resistance, and the communication equipment such as emergency rescue walkie-talkies have fewer functions, are inconvenient to fix, have low transmission power, short communication distance, and weak anti-interference ability; the mine communication system is easily damaged when an accident occurs, and the existing mine explosion-proof or explosion-proof and intrinsically safe ground-penetrating communication system has poor portability, safety, and reliability. The communication distance of wireless network node equipment is short, the anti-interference ability is weak, the sensitivity is low, and the endurance time is short. Long-distance optical fiber communication is difficult to achieve due to the limited length of communication optical cables that rescuers can carry at one time. The cables of existing communication systems are bulky, and the wired communication system and the wireless communication system cannot be integrated by themselves. The existing various emergency rescue platforms have a single communication mode, scattered functions, poor information and data analysis capabilities, and low intelligence. There is a lack of efficient interconnection between the emergency rescue platform and the disaster area reconnaissance equipment, and a lack of advanced technical means for rescue decision-making. The existing life detection technology makes it difficult to detect and search for victims. RFID identification cards cannot accurately locate the geographic coordinates of underground personnel.

[0004] In the face of disasters, "communication saves lives" is a primary emergency criterion. By quickly building an emergency rescue communication system information platform based on signal line and power line composite cables and wireless ad hoc networks, the accurate situation of the accident site is detected, data support is provided for on-site rescue command, and on-site rescue work is ensured to be carried out in an orderly manner, to avoid casualties of the rescue team members themselves, and to achieve safe rescue. The multifunctional communication node for mines is a key device in the mine emergency rescue communication system, and the present invention is generated based on the above background. Summary of the invention

[0005] In order to overcome the shortcomings of the existing mine emergency rescue communication technology, the present invention provides a mine emergency rescue multifunctional communication node, which can quickly lay an emergency rescue communication system after a disaster, enable heterogeneous interconnection of different communication equipment, realize two-way voice communication and wireless broadcasting, and video transmission functions; collect environmental gas, carbon monoxide, oxygen and other parameters at the accident site in real time; monitor the vital signs parameters of rescuers and rescued persons in real time, and provide real-time and accurate decision-making basis for ground and underground rescue command.

[0006] To achieve the above-mentioned purpose, a multifunctional communication node for emergency rescue in a mine of the present invention comprises a power supply control unit, a CPU central control unit, a wireless transceiver unit, a network interface unit and several positioning terminals;

[0007] The power supply control unit is composed of a DCDC control chip and an LDO chip, which provides a stable and reliable power supply guarantee, and realizes a stable 3.3V / 3A DC current and a 1.2V / 1A DC current supply. It adopts a composite cable for power supply, and the power supply distance is not less than 1Km. The distance between nodes is not more than 50m during deployment. The first node is powered by a dedicated power supply, and the nodes within 1Km are powered by data line feeding. When the distance exceeds 1Km, the starting node adopts the power supply cable of the composite cable, and the subsequent nodes are powered by data line feeding;

[0008] The core of the CPU central control unit is composed of MT7620 and supporting DDR chips, which realize the core processing of data, namely the switching function, provide data processing and switching for the uplink data port and the downlink data port, and realize the management of the emergency rescue multifunctional communication node;

[0009] The wireless transceiver unit receives and sends wireless data, implements filtering, shaping, and signal amplification of wireless data, and implements a direct data transmission channel between the data and the CPU central control unit and the network interface unit;

[0010] The network interface unit is composed of an uplink data interface and a downlink data interface, which realizes the uplink and downlink transmission interfaces of wired data, forming a complete uplink and downlink data transmission channel;

[0011] The positioning terminal is equipped with different types according to the underground personnel, vehicles and equipment. The wireless transceiver unit collects the wireless signal of the positioning terminal in real time. The CPU central control unit quickly captures the position of the positioning terminal through an autonomous filtering algorithm, locates the entire distance within the coverage of the cable, and determines the direction of entry and exit of the well through the moving trajectory of the positioning terminal. The real-time positioning accuracy of the positioning terminal is within 2 meters when the positioning terminal is stationary.

[0012] Preferably, the DC power supply voltage ripple provided by the power supply control unit is no more than 10mV.

[0013] Preferably, the software system of the CPU central control unit is based on the Linux operating system, and the CPU central control unit supports the exchange processing of two 100 / 1000Mbps Ethernet data.

[0014] Preferably, the data processing rate of the CPU central control unit is not less than 400Mhz.

[0015] Preferably, the wireless signal frequency of the wireless data transceiver unit is 2.4 GHz, which is used to receive positioning data, voice data, transmit broadcast data and auxiliary rescue data.

[0016] Preferably, the network interface unit supports an uplink data interface and a downlink data interface, both of which are standard 100 / 1000Mbps Ethernet interfaces, to achieve transmission of one or more of positioning data, voice data, broadcast data, and auxiliary rescue data.

[0017] Preferably, the voice communication function of voice data uses a terminal with voice communication function underground. Through the wireless transceiver unit, it can provide users with mobile voice communication services while positioning, and can roam throughout the entire network, freeing underground communications from the constraints of cables and ensuring smooth communication above and below the well.

[0018] Preferably, the communication node supports point-to-point and point-to-multipoint communication, can broadcast and multicast to underground terminals through the dispatch console, and supports communication between dispatch phones and mobile terminals within the network, and supports intercommunication between phones outside the network and underground terminals.

[0019] The beneficial effects of the present invention are as follows: by quickly building an emergency rescue communication system information platform based on a composite cable of signal lines and power lines and a wireless ad hoc network, the accurate situation at the accident site can be scouted, data support can be provided for on-site rescue command, and on-site rescue work can be ensured to be carried out in an orderly manner, thereby avoiding casualties among rescue team members themselves and achieving safe rescue. The application prospects of the present invention are very broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Attached Figure 1 The overall structure diagram of a multifunctional communication node for mine emergency rescue is shown in FIG.

[0021] Attached Figure 2 is a schematic diagram of a power supply control unit;

[0022] Attached Figure 3 This is a schematic diagram of the CPU central control unit;

[0023] Attached Figure 4 is a schematic diagram of a wireless transceiver unit;

[0024] Attached Figure 5 is a schematic diagram of the structure of a network interface unit;

[0025] Attached Figure 6 A schematic diagram of the deployment implementation. DETAILED DESCRIPTION

[0026] like Figure 1-Figure 5 As shown, a multifunctional communication node for emergency rescue in a mine of the present invention comprises a power supply control unit 1, a CPU central control unit 2, a wireless transceiver unit 3, a network interface unit 4 and a plurality of positioning terminals;

[0027] The power supply control unit 1 is composed of a DCDC control chip and an LDO chip, which provides a stable and reliable power supply guarantee, and realizes a stable 3.3V / 3A DC current and a 1.2V / 1A DC current supply. It adopts a composite cable for power supply, and the power supply distance is not less than 1Km. The distance between nodes is not more than 50m when deployed. The first node is provided by a dedicated power supply, and the nodes within 1Km are powered by the data line. When the distance exceeds 1Km, the starting node adopts the power supply cable of the composite cable, and the subsequent nodes are powered by the data line. The external power supply can be in the range of DC 9V to 15V, and the standard uses the 12V input standard;

[0028] The core of the CPU central control unit 2 is composed of MT7620 and a matching DDR chip, which realizes the core processing of data, that is, the exchange function, provides data processing and exchange for the uplink data port and the downlink data port, and realizes the management of the emergency rescue multifunctional communication node. The CPU central control unit 2 is composed of a basic CPU and a peripheral reset circuit, a program storage circuit, and a DDR external cache circuit to realize the basic data exchange management circuit;

[0029] The wireless transceiver unit 3 receives and sends wireless data. The wireless transceiver unit 3 implements filtering, shaping, and signal amplification of wireless data. The wireless transceiver unit 3 implements a direct data transmission channel between the data and the CPU central control unit 2 and the network interface unit 4. The data sent by the CPU central control unit 2 is converted into a radio frequency 2.4Ghz wireless signal after filtering, shaping, and power amplification and then passed through the antenna for transmission; the process of the CPU central control unit 2 receiving data through the wireless transceiver unit 3 is the reverse process of the transmission process. The wireless signal is received by the antenna, and then sent to the CPU central control unit 2 after power development and filtering and shaping to realize data reception;

[0030] The network interface unit 4 is composed of an uplink data interface and a downlink data interface, which realizes the uplink and downlink transmission interfaces of wired data, and forms a complete uplink and downlink data transmission channel. During the transmission of network data, the uplink data interface, the downlink data interface, and the wireless data interface are equal in data interaction status, and the data of the three interfaces can be directly exchanged with each other on the three interfaces, thereby building a transparent data transmission communication platform;

[0031] The positioning terminal is equipped with different types according to the underground personnel, vehicles and equipment. The wireless transceiver unit 3 collects the wireless signal of the positioning terminal in real time. The CPU central control unit 2 quickly captures the position of the positioning terminal through an autonomous filtering algorithm, locates the entire process within the coverage of the cable, and determines the direction of entering and exiting the well through the moving trajectory of the positioning terminal. The real-time positioning accuracy of the positioning terminal is within 2 meters when the positioning terminal is stationary.

[0032] The DC power supply voltage ripple provided by the power supply control unit 1 is no greater than 10 mV.

[0033] The software system of the CPU central control unit 2 is based on the Linux operating system. The CPU central control unit 2 supports the exchange processing of two 100 / 1000Mbps Ethernet data. The data processing rate of the CPU central control unit 2 is not less than 400Mhz.

[0034] The wireless signal frequency of the wireless data transceiver unit 3 is 2.4 GHz, which is used to receive positioning data, voice data, transmit broadcast data and auxiliary rescue data.

[0035] The network interface unit 4 supports an uplink data interface and a downlink data interface, both of which are standard 100 / 1000Mbps Ethernet interfaces, to achieve transmission of one or more types of data including positioning data, voice data, broadcast data, and auxiliary rescue data.

[0036] The present invention also has a data bus transmission function. Various intrinsically safe monitoring equipment underground, such as gas concentration detectors, wind pressure sensors, roof pressure sensors, data terminals such as the vital signs of rescue team members and people in distress, can aggregate data to the CPU central control unit 2 through the wireless transceiver unit 3, and then transmit the data to the data bus through the network interface unit 4 for comprehensive analysis and decision-making by the ground monitoring center.

[0037] The present invention is an open basic communication platform. Any manufacturer can integrate its sensors, controllers, and personnel communication equipment into the mine emergency rescue communication network as long as it complies with standard wireless communication specifications, thereby realizing unified management and interaction of personnel and equipment.

[0038] Deployment and implementation: Figure 6 As a deployment implementation diagram, the present invention uses a mine intrinsically safe package, and the composite cables connected at both ends can be hung on the wall of the tunnel at the mine accident site like ordinary cables. They can be spliced ​​and bifurcated, and are tensile and wear-resistant. They can perfectly cope with the complex branching structure of the tunnel at the mine accident site. As long as there is space for laying cables, this communication system can be laid. It is not affected by the corners and fork structures of the space, and the deployment method is extremely simple and fast, which wins precious time for emergency rescue of mine accidents. With low power consumption design, two adjacent power supply positions can be connected up to 2km apart, solving the problem of difficulty in obtaining power underground; the signal is uniform and fully covered, and uniform wireless signal coverage can be formed wherever the multifunctional communication node is laid, covering a range of 30 meters in radius from the cable. Compared with the traditional base station deployment method, it has no dead angles or blind spots, and has stronger anti-interference ability; it is easy to maintain and repair quickly, and the multifunctional communication node has a self-test function. The background monitors the operating status of cables, information converters and other equipment in real time, and promptly alarms when a fault occurs; it supports remote diagnosis, upgrades and restarts and other operations; if a section of cable fails, it can be directly cut off, and a new section of cable can be connected using a quick connector to complete the troubleshooting work; the cable connection adopts the cold connection method, which does not require professional tools and can be completed by hand or with simple tools.

[0039] The above is only a preferred implementation of a multifunctional communication node of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A multifunctional communication node for mine emergency rescue, characterized in that: It comprises a power supply control unit (1), a CPU central control unit (2), a wireless transceiver unit (3), a network interface unit (4) and a plurality of positioning terminals; The power supply control unit (1) is composed of a DCDC control chip and an LDO chip, providing a stable and reliable power supply guarantee, realizing a stable 3.3V / 3A DC current and a 1.2V / 1A DC current supply, and adopts a composite cable for power supply. When the distance between nodes is deployed, it does not exceed 50m. The first node is powered by a dedicated power supply, and the nodes within 1km are powered by data line power supply. When the distance exceeds 1km, the starting node adopts a composite cable power supply cable, and the subsequent nodes adopt data line power supply. The core of the CPU central control unit (2) is composed of MT7620 and a matching DDR chip, which realizes the core processing of data, namely the switching function, provides data processing and switching for the uplink data port and the downlink data port, and realizes the management of the emergency rescue multifunctional communication node; The wireless transceiver unit (3) receives and sends wireless data. The wireless transceiver unit (3) implements filtering, shaping, and signal amplification of wireless data. The wireless transceiver unit (3) implements a direct data transmission channel between the data and the CPU central control unit (2) and the network interface unit (4); The network interface unit (4) is composed of an uplink data interface and a downlink data interface, which realizes the interface of uplink and downlink transmission of wired data, forming a complete uplink and downlink data transmission channel; The positioning terminal is equipped with different types according to the underground personnel, vehicles and equipment. The wireless transceiver unit (3) collects the wireless signal of the positioning terminal in real time. The CPU central control unit (2) quickly captures the position of the positioning terminal through an autonomous filtering algorithm, locates the whole process within the coverage of the cable, and determines the direction of entering and exiting the well through the moving trajectory of the positioning terminal. The real-time positioning accuracy of the positioning terminal is within 2 meters when the positioning terminal is stationary. It also has a data bus transmission function. Various underground safety monitoring devices collect data to the CPU central control unit (2) through the wireless transceiver unit (3), and then transmit the data to the data bus through the network interface unit (4) to the ground monitoring center for comprehensive analysis and decision-making; Through mining packaging, the composite cables connected at both ends can be hung on the wall of the tunnel at the mine accident site like ordinary cables. They can be spliced ​​and forked, are tensile and wear-resistant, and can perfectly cope with the complex branching structure of the tunnel at the mine accident site. As long as there is space for laying cables, this communication system can be laid, and it is not affected by the corners and fork structures of the space.

2. The multifunctional communication node for mine emergency rescue according to claim 1, characterized in that: The software system of the CPU central control unit (2) is based on the Linux operating system, and the CPU central control unit (2) supports the exchange processing of two 100 / 1000Mbps Ethernet data.

3. The multifunctional communication node for mine emergency rescue according to claim 2 is characterized in that: The data processing rate of the CPU central control unit (2) is not less than 400Mhz.

4. The multifunctional communication node for mine emergency rescue according to claim 1, characterized in that: The wireless signal frequency of the wireless data transceiver unit (3) is 2.4 GHz, and is used to receive positioning data, voice data, and transmit broadcast data and auxiliary rescue data.

5. The multifunctional communication node for mine emergency rescue according to claim 1, characterized in that: The network interface unit (4) supports an uplink data interface and a downlink data interface, both of which are standard 100 / 1000 Mbps Ethernet interfaces, and realizes the transmission of one or more types of data selected from positioning data, voice data, broadcast data, and auxiliary rescue data.

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