Coal mine underground gas real-time monitoring system and monitoring method

Abstract

An underground coal mine gas real-time monitoring system comprises a plurality of gas sensors arranged in an underground coal mine and used for collecting real-time gas parameters; the wireless data transmission network is used for transmitting the real-time gas parameters, the wireless data transmission network comprises a plurality of wireless network terminals which are movably arranged, and a dynamic data sub-network used for sharing the real-time gas parameters is established based on the signal intensity in the moving process of the wireless network terminals; the terminal management server is arranged at a mine exit and used for activating the wireless network terminal in the moving process of the wireless network terminal and obtaining real-time gas parameters from the wireless network terminal; and the data management server is used for acquiring the real-time gas parameters from the terminal management server and processing and storing the real-time gas parameters. According to the coal mine underground gas real-time monitoring system and the coal mine underground gas real-time monitoring method, real-time gas parameters are transmitted in a wireless communication mode, additional data cables do not need to be laid, implementation is easier, and in addition, data safety is high.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine safety, in particular to a real-time monitoring system and method for underground gas in a coal mine. Background Art

[0002] Coal mine gas is a harmful gas mainly composed of coalbed methane in coal mines, sometimes referred to as methane alone. In the process of coal mining, gas is an important factor causing safety accidents, so it is necessary to monitor the gas and deal with it in time when dangerous situations such as gas outbursts occur. In the prior art, gas monitoring mainly involves setting gas sensors at specific locations and laying dedicated data cables to upload the gas data generated by the gas sensors to the upper equipment. With the continuous increase in the progress of mining, new gas sensors and data cables need to be continuously added. The construction process is complicated, and the data cables may be damaged by underground equipment, resulting in data loss, which in turn poses a safety hazard. Summary of the invention

[0003] In order to solve the deficiencies in the prior art, the present invention provides a real-time coal mine gas monitoring system and monitoring method, which adopts wireless communication to transmit real-time gas parameters, does not need to lay additional data cables, is easier to implement, and has high data security.

[0004] In order to achieve the above object, the specific scheme adopted by the present invention is:

[0005] A real-time monitoring system for underground coal mine gas, comprising:

[0006] Multiple gas sensors are installed in coal mines to collect real-time gas parameters.

[0007] A wireless data transmission network, used for transmitting the real-time gas parameters, the wireless data transmission network includes a plurality of wireless network terminals that are arranged in a mobile manner, and a dynamic data subnet for sharing the real-time gas parameters is established based on signal strength during the movement of the wireless network terminals;

[0008] The terminal management server is arranged at the mine exit, and is used to activate the wireless network terminal during the movement of the wireless network terminal, and obtain the real-time gas parameters from the wireless network terminal;

[0009] The data management server is used to obtain the real-time gas parameters from the terminal management server, and process and store them.

[0010] Preferably, the wireless network terminal includes an inner shell, the interior of the inner shell is provided with a processing module, a communication module, a storage module and a power module, wherein the processing module is electrically connected to the communication module and the storage module, and the outside of the inner shell is provided with a sealed protective shell.

[0011] Preferably, the inner shell includes a first substrate and a second substrate arranged parallel to each other, the first substrate is fixedly connected to a first frame, the second substrate is fixedly connected to a second frame, the first frame and the second frame are arranged opposite to each other, and the first frame is sleeved on the peripheral side of the second frame, the first substrate, the second substrate, the first frame and the second frame enclose a cavity for accommodating the processing module, the communication module, the storage module and the power module.

[0012] Preferably, a shock-absorbing frame is fixedly provided on the inner wall of the first frame, and the second frame abuts against the shock-absorbing frame and is connected to the shock-absorbing frame via a plurality of adhesive strips.

[0013] Preferably, a mounting plate parallel to the second substrate is fixedly provided on the inner wall of the second frame, a channel is opened in the middle of the mounting plate, a main board and a lining plate are respectively provided on both sides of the mounting plate, and the main board and the lining plate are connected by a number of connecting bolts, and the processing module, the communication module and the storage module are all arranged on the main board.

[0014] Preferably, the power module includes a battery and a wireless charging component, wherein the battery is fixedly arranged on the first substrate, and the wireless charging component is fixedly arranged on the second substrate, the input end of the battery is electrically connected to the wireless charging component through a charging cable, and the charging cable passes through the mounting plate, and the output end of the battery supplies power to the mainboard through an output line.

[0015] Preferably, a groove is formed on the outer wall of the sealing protection shell, and the groove is close to the second substrate.

[0016] A method for real-time monitoring of gas in a coal mine, based on the above-mentioned real-time monitoring system for gas in a coal mine, comprises the following steps:

[0017] S1. deploying the gas sensor, which monitors the gas and generates the real-time gas parameter, where the real-time gas parameter includes a generation time and a gas monitoring value;

[0018] S2. Initializing and authenticating the wireless network terminal using the terminal management server;

[0019] S3, the wireless network terminal is allocated to the underground personnel and the underground equipment, and the underground personnel and the underground equipment carry the wireless network terminal and move in the coal mine;

[0020] S4. When the signal strength between the wireless network terminal and the gas sensor reaches a preset strength threshold, the wireless network terminal obtains real-time gas parameters from the gas sensor;

[0021] S5. During the movement of the wireless network terminal, the wireless network terminal finds other wireless network terminals whose signal strength reaches the strength threshold with itself, and establishes a dynamic data subnet;

[0022] S6. The wireless network terminals share real-time gas parameters in the dynamic data subnet;

[0023] S7, when the wireless network terminal leaves the mine, sending the real-time gas parameters to the terminal management server;

[0024] S8, the terminal management server sends the received real-time gas parameters to the data management server according to a preset period;

[0025] S9. The data management server summarizes all acquired real-time gas parameters and generates gas monitoring results.

[0026] Preferably, in S4 and S5, when the wireless network terminal finds the gas sensor or other wireless network terminal whose signal strength reaches a strength threshold, it sends a connection request message and waits for feedback. When the wireless network terminal receives the connection confirmation message fed back by the gas sensor or other wireless network terminal, it establishes a wireless communication connection and transmits the real-time gas parameters.

[0027] Preferably, after receiving the real-time gas parameters, the terminal management server screens and corrects the gas monitoring values ​​based on the generation time.

[0028] The present invention transmits the real-time gas parameters collected by the gas sensor in a wireless communication manner, which does not require the additional laying of communication cables or the continuous extension of communication cables during the construction process, and is easier to implement. The present invention adopts multiple wireless network terminals to form a dynamic wireless data transmission network, and the wireless data transmission network includes multiple dynamically changing dynamic data subnets. In the dynamic data subnet, the wireless network terminals share the real-time gas parameters they have received, and can realize dynamic backup of the implemented gas parameters, ensure the data security of the real-time gas parameters, and further ensure that the implemented gas parameters can be accurately transmitted to the terminal management server and the data management server. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a structural block diagram of the system of the present invention;

[0031] Figure 2 It is a schematic diagram of the network structure when wireless network terminals form a dynamic data subnet;

[0032] Figure 3 It is a schematic diagram of the overall structure of a wireless network terminal;

[0033] Figure 4 It is a schematic diagram of the internal structure of a wireless network terminal.

[0034] Figure markings: 1-sealed protective shell, 2-groove, 3-first substrate, 4-first frame, 5-shock-absorbing frame, 6-adhesive strip, 7-battery, 8-output line, 9-charging line, 10-second frame, 11-second substrate, 12-mounting plate, 13-lining plate, 14-wireless charging assembly, 15-connecting bolt, 16-channel, 17-main board. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] like Figure 1 and 2 As shown, a real-time monitoring system for underground coal mine gas includes a data management server, a terminal management server, a wireless data transmission network and multiple gas sensors.

[0037] A plurality of gas sensors are arranged in the coal mine, and the gas sensors are used to collect real-time gas parameters. The gas sensor can be flexibly arranged at a suitable position according to the actual monitoring needs. In the present invention, the gas sensor needs to be arranged as a wireless gas sensor, which belongs to the prior art in this field and will not be described in detail here. Accordingly, the gas sensor can be battery-powered, and the battery is detachable, and there is no need to deploy a power supply cable separately. It is more flexible and can be deployed to the position that needs to be monitored according to the construction progress. It should be noted that at this time, the battery and the connector need to be explosion-proofed, and the specific processing method is also a conventional technology in this field, which will not be described in detail here.

[0038] A wireless data transmission network is used to transmit real-time gas parameters. The wireless data transmission network includes multiple wireless network terminals that are arranged in a mobile manner, and a dynamic data subnet for sharing real-time gas parameters is formed based on signal strength during the movement of the wireless network terminals. The wireless network terminals are correspondingly allocated to underground personnel and underground equipment. During the movement of underground personnel and underground equipment, the wireless network terminals can approach the gas sensor and establish a link with the gas sensor to obtain real-time gas parameters from the gas sensor. On the other hand, during the movement, the wireless network terminal can also find other wireless network terminals with a signal strength close to its own, thereby forming a dynamic data subnet and sharing the received real-time gas parameters in the dynamic data subnet. By continuously sharing the real-time gas parameters, the real-time gas parameters obtained by the wireless network terminal can be backed up to avoid the loss of the gas parameters, and ensure that the real-time gas parameters can be accurately transmitted to the outside to achieve real-time monitoring of underground gas.

[0039] The terminal management server is set at the exit of the mine and is used to activate the wireless network terminal during the movement of the wireless network terminal and obtain real-time gas parameters from the wireless network terminal. When the underground personnel and underground equipment carry the wireless network terminal into the mine, the terminal management server is used to activate the wireless network terminal so that the wireless network terminal can enter the working state. When the wireless network terminal leaves the mine, the terminal management server is used to close the wireless network terminal so that the wireless network terminal can enter the standby state, thereby extending the use time of a single charge. On the other hand, when the wireless network terminal leaves the mine, all real-time gas parameters received by the wireless network terminal are obtained from the wireless network terminal.

[0040] The data management server is used to obtain real-time gas parameters from the terminal management server, and process and store them. The data management server is used to obtain, process and store all implemented gas parameters and generate the final gas monitoring results. When the gas monitoring results show that the local gas concentration exceeds the preset safety threshold, the data management server issues a warning to remind relevant personnel to handle it in time.

[0041] The present invention transmits the real-time gas parameters collected by the gas sensor in a wireless communication manner, which does not require the additional laying of communication cables or the continuous extension of communication cables during the construction process, and is easier to implement. The present invention adopts multiple wireless network terminals to form a dynamic wireless data transmission network, and the wireless data transmission network includes multiple dynamically changing dynamic data subnets. In the dynamic data subnet, the wireless network terminals share the real-time gas parameters they have received, and can realize dynamic backup of the implemented gas parameters, ensure the data security of the real-time gas parameters, and further ensure that the implemented gas parameters can be accurately transmitted to the terminal management server and the data management server.

[0042] like Figure 3 and 4 As shown, in the present invention, the specific structure of the wireless network terminal includes an inner shell, and a processing module, a communication module, a storage module and a power module are arranged inside the inner shell, wherein the processing module is electrically connected to the communication module and the storage module, and a sealed protective shell 1 is arranged outside the inner shell. The processing module is used to control the communication module and the storage module, and process the real-time gas parameters. More specifically, during the movement of the wireless network terminal, the processing module discovers the gas sensor and other wireless network terminals through the communication module in real time. When the signal strength meets the conditions, the processing module communicates with the gas sensor or other wireless network terminals through the communication module to implement the transmission of the gas parameters; when the real-time gas parameters are received, the processing module writes the real-time gas parameters into the storage module; the power module is used to power the processing module, the communication module and the storage module. In the present invention, the processing module can adopt a single-chip microcomputer, such as the STM32 series, and the communication module can adopt a WIFI module, a Bluetooth module or a ZigBee module, etc., all of which belong to mature existing technologies and will not be repeated here. The sealing protective shell 1 is used to seal the inner shell and the various components arranged inside the inner shell to avoid safety accidents caused by internal current, meet the requirements of explosion-proof, and fully ensure safety. The sealing protective shell 1 can be made of conventional materials such as silicone, resin or rubber, which will not be repeated here.

[0043] The specific structure of the inner shell is as follows: the inner shell includes a first substrate 3 and a second substrate 11 arranged in parallel with each other, the first substrate 3 is fixedly connected to the first frame 4, the second substrate 11 is fixedly connected to the second frame 10, the first frame 4 and the second frame 10 are arranged opposite to each other, and the first frame 4 is sleeved on the peripheral side of the second frame 10, and the first substrate 3, the second substrate 11, the first frame 4 and the second frame 10 enclose a cavity for accommodating a processing module, a communication module, a storage module and a power module. The first frame 4 and the second frame 10 are connected by plugging, which is simple and convenient, and easy to assemble and disassemble.

[0044] In order to improve the safety of the wireless network terminal and avoid damage caused by vibration due to accidental falling or other reasons, a shock absorbing frame 5 is fixedly arranged on the inner wall of the first frame 4, and the second frame 10 is against the shock absorbing frame 5 and connected to the shock absorbing frame 5 through multiple adhesive strips 6. When the wireless network terminal falls, the first substrate 3 and the second substrate 11 may move toward each other, driving the second frame 10 to move toward the inside of the first frame 4. During the process, the second frame 10 squeezes the shock absorbing frame 5, so that the shock absorbing frame 5 absorbs the vibration energy to protect the modules in the cavity. The shock absorbing frame 5 can be made of soft rubber.

[0045] The shock-absorbing frame 5 can play a shock-absorbing role when the first substrate 3 and the second substrate 11 move toward each other. However, when the wireless network terminal falls to the ground in a direction parallel to the first substrate 3 and the second substrate 11, the shock-absorbing frame 5 will lose its function. In order to protect the wireless network terminal in this case, especially to protect each module, a mounting plate 12 parallel to the second substrate 11 is fixedly provided on the inner wall of the second frame 10, and a channel 16 is opened in the middle of the mounting plate 12. A main board 17 and a lining plate 13 are respectively arranged on both sides of the mounting plate 12, and the main board 17 and the lining plate 13 are connected by a plurality of connecting bolts 15. The processing module, the communication module and the storage module are all arranged on the main board 17. The areas of the main board 17 and the lining board 13 are larger than the areas of the passage 16, so that the main board 17 and the lining board 13 cannot pass through the passage 16. When the wireless network terminal falls in a direction parallel to the first substrate 3 and the second substrate 11, the main board 17 and the lining board 13 can move up and down under the action of gravity without directly impacting the first frame 4 and the second frame 10, so that the main board 17 and the modules arranged thereon can be protected. A shock-absorbing layer can also be added to the inner wall of the passage 16. The shock-absorbing layer can be made of sponge material. When the main board 17 and the lining board 13 move up and down, when the connecting bolts 15 hit the shock-absorbing layer, the shock-absorbing layer can absorb the vibration energy, and further protect the main board 17 and the modules thereon.

[0046] The power module includes a battery 7 and a wireless charging component 14, wherein the battery 7 is fixedly arranged on the first substrate 3, and the wireless charging component 14 is fixedly arranged on the second substrate 11. The input end of the battery 7 is electrically connected to the wireless charging component 14 through a charging line 9, and the charging line 9 passes through the mounting plate 12, and the output end of the battery 7 supplies power to the mainboard 17 through an output line 8. Because the wireless network terminal as a whole needs to be sealed with a sealed protective shell 1, it is impossible to charge the battery 7 directly by wire. The present invention adopts a wireless charging method. When the remaining power of the battery 7 cannot continue to maintain the operation of the wireless network terminal, the battery 7 is charged by the wireless charging component 14. The technology of wireless charging belongs to the mature existing technology and will not be repeated here.

[0047] Considering that the service life of the battery 7 itself is limited, and each module may also fail, the wireless network terminal needs to be opened for maintenance, and the wireless network terminal as a whole is sealed and protected by a sealed protective shell 1. In order to facilitate the removal of the sealed protective shell 1 to open the wireless network terminal, a groove 2 is provided on the outer wall of the sealed protective shell 1, and the groove 2 is close to the second substrate 11. When the sealed protective shell 1 needs to be removed, the sealed protective shell 1 is cut along the groove 2 with a tool. During the process, the second substrate 11 can limit the tool to prevent the tool from being inserted too deeply and damaging each module. At the same time, because the battery 7 is fixedly set on the first substrate 3, even if the tool damages the second substrate 11, it can only contact the wireless charging component 14, and will not contact the battery 7, thereby avoiding damage to the battery 7. In particular, when the battery 7 is set as a lithium battery, it can avoid the battery 7 from being damaged and burning to cause a safety accident.

[0048] The present invention further provides a method for real-time monitoring of gas in coal mines. Based on the above-mentioned real-time monitoring system for gas in coal mines, the method includes S1 to S9.

[0049] S1. Deploy gas sensors, which monitor gas and generate real-time gas parameters. The real-time gas parameters include generation time and gas monitoring value.

[0050] S2. Initialize and authenticate the wireless network terminal using the terminal management server. During the initialization process, the terminal management server instructs the wireless network terminal to delete all real-time gas parameters stored in the storage module to avoid storage overflow when the wireless network terminal obtains real-time gas parameters underground, thereby avoiding the loss of real-time gas parameters; the authentication process is used to verify the legitimacy of the wireless network terminal. Specifically, the terminal management server obtains the encrypted identity authentication code stored in the wireless network terminal, and compares the identity authentication code with its own stored identity database. If the comparison is successful, the verification is passed. At this time, the wireless network terminal is a legal device, and a legal tag is transmitted to the wireless network terminal. The wireless network terminals use the legal tag to verify each other during the underground communication process. Wireless network terminals without legal tags cannot obtain and transmit gas parameters.

[0051] S3. Allocation of wireless network terminals to underground personnel and underground equipment. The underground personnel and underground equipment carry wireless network terminals and move underground in the coal mine. All wireless network terminals are collected and stored when leaving the underground. At this time, the gas parameters stored in the wireless network terminals can be used as cold backups. When the gas parameters in the terminal management server are lost, they can be used as supplements to further improve data security. When underground personnel and underground equipment need to enter the underground, wireless network terminals are reallocated.

[0052] S4. When the signal strength between the wireless network terminal and the gas sensor reaches a preset strength threshold, the wireless network terminal obtains real-time gas parameters from the gas sensor. The wireless network terminal establishes a link with the gas sensor based on the signal strength, which can ensure the stability of the communication process and avoid the loss of real-time gas parameters.

[0053] S5. During the movement of the wireless network terminal, it finds other wireless network terminals whose signal strength reaches a strength threshold with its own, and establishes a dynamic data subnet.

[0054] S6. Wireless network terminals share real-time gas parameters in the dynamic data subnet.

[0055] More specifically, in S4 and S5, when the wireless network terminal finds a gas sensor or other wireless network terminal whose signal strength reaches the strength threshold, it sends a connection request message and waits for feedback. When the wireless network terminal receives a connection confirmation message fed back by the gas sensor or other wireless network terminal, it establishes a wireless communication connection and transmits real-time gas parameters. The dynamic data subnet can include multiple wireless network terminals at the same time. In the dynamic data subnet, the signal strength between any two wireless network terminals reaches the strength threshold, thereby ensuring that the real-time gas parameters received by any wireless network terminal can be smoothly shared with other wireless network terminals. When the signal strength between a wireless network terminal and all other wireless network terminals is lower than the strength threshold, it automatically leaves the dynamic data subnet. At the same time, if other wireless network terminals cannot communicate with the wireless network terminal within the preset monitoring time, it can be determined that the wireless network terminal has left the network and no longer attempts to communicate with it, thereby avoiding wasting power. When sharing real-time gas parameters, the wireless network terminal shares them by broadcasting. The wireless network terminal that receives the real-time gas parameters stores the real-time gas parameters in its own storage module.

[0056] S7. When the wireless network terminal leaves the mine, the real-time gas parameters are sent to the terminal management server.

[0057] S8. The terminal management server sends the received real-time gas parameters to the data management server according to a preset cycle. After receiving the real-time gas parameters, the terminal management server screens and corrects the gas monitoring values ​​based on the generation time. By sharing the real-time gas parameters, the security of the real-time gas parameters can be fully guaranteed to avoid data loss. However, it will also cause redundancy of the real-time gas parameters, that is, the amount of data of the real-time gas parameters received by the terminal management server will exceed the amount of data of the real real-time gas parameters, so the terminal management server needs to screen and correct the received real-time gas parameters. Specifically, the terminal management server first screens all real-time gas parameters based on the generation time, aggregates all real-time gas parameters corresponding to the same generation time, and regroups based on the gas sensors corresponding to the real-time gas parameters to obtain multiple data groups, and all real-time gas parameters in a data group belong to the same generation time and a gas sensor. Afterwards, the terminal management server corrects each data group, counts the same real-time gas parameters, takes the real-time gas parameter with the largest number as the true value, and removes the remaining real-time gas parameters as false values, and finally stores the corrected real-time gas parameters. The corrected implementation gas parameters include the gas sensor number, generation time and corrected gas monitoring value.

[0058] S9. The data management server summarizes all acquired real-time gas parameters and generates a gas monitoring result. The gas monitoring result includes the gas monitoring values ​​generated by all gas sensors at each generation time within a monitoring cycle.

[0059] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0060] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A real-time monitoring system for underground coal mine gas, characterized in that: include: Multiple gas sensors are installed in coal mines to collect real-time gas parameters. A wireless data transmission network, used for transmitting the real-time gas parameters, the wireless data transmission network includes a plurality of wireless network terminals that are arranged in a mobile manner, and a dynamic data subnet for sharing the real-time gas parameters is established based on signal strength during the movement of the wireless network terminals; The terminal management server is arranged at the mine exit, and is used to activate the wireless network terminal during the movement of the wireless network terminal, and obtain the real-time gas parameters from the wireless network terminal; The data management server is used to obtain the real-time gas parameters from the terminal management server, and process and store them.

2. A real-time coal mine gas monitoring system as claimed in claim 1, characterized in that: The wireless network terminal comprises an inner shell, wherein a processing module, a communication module, a storage module and a power module are arranged inside the inner shell, wherein the processing module is electrically connected to the communication module and the storage module, and a sealed protective shell (1) is arranged outside the inner shell.

3. A real-time coal mine gas monitoring system as claimed in claim 2, characterized in that: The inner shell comprises a first substrate (3) and a second substrate (11) which are arranged parallel to each other, the first substrate (3) is fixedly connected to a first frame (4), the second substrate (11) is fixedly connected to a second frame (10), the first frame (4) and the second frame (10) are arranged opposite to each other, and the first frame (4) is sleeved on the circumference of the second frame (10), and the first substrate (3), the second substrate (11), the first frame (4) and the second frame (10) enclose a cavity for accommodating the processing module, the communication module, the storage module and the power module.

4. A real-time coal mine gas monitoring system as claimed in claim 3, characterized in that: A shock-absorbing frame (5) is fixedly arranged on the inner wall of the first frame (4); the second frame (10) abuts against the shock-absorbing frame (5) and is connected to the shock-absorbing frame (5) via a plurality of adhesive strips (6).

5. A real-time coal mine gas monitoring system as claimed in claim 3, characterized in that: A mounting plate (12) parallel to the second base plate (11) is fixedly arranged on the inner wall of the second frame (10); a channel (16) is provided in the middle of the mounting plate (12); a main board (17) and a lining plate (13) are respectively arranged on both sides of the mounting plate (12); the main board (17) and the lining plate (13) are connected via a plurality of connecting bolts (15); and the processing module, the communication module and the storage module are all arranged on the main board (17).

6. A real-time coal mine gas monitoring system as claimed in claim 5, characterized in that: The power module comprises a battery (7) and a wireless charging component (14), wherein the battery (7) is fixedly arranged on the first substrate (3), and the wireless charging component (14) is fixedly arranged on the second substrate (11); the input end of the battery (7) is electrically connected to the wireless charging component (14) via a charging line (9), and the charging line (9) passes through the mounting plate (12); and the output end of the battery (7) supplies power to the mainboard (17) via an output line (8).

7. A real-time coal mine gas monitoring system as claimed in claim 6, characterized in that: A groove (2) is provided on the outer wall of the sealing protection shell (1), and the groove (2) is close to the second substrate (11).

8. A method for real-time monitoring of gas in coal mines, based on a real-time monitoring system for gas in coal mines as claimed in claim 1, characterized in that: The method comprises the following steps: S1. deploying the gas sensor, which monitors gas and generates the real-time gas parameters, where the real-time gas parameters include generation time and gas monitoring value; S2. Initializing and authenticating the wireless network terminal using the terminal management server; S3, the wireless network terminal is allocated to the underground personnel and the underground equipment, and the underground personnel and the underground equipment carry the wireless network terminal and move in the coal mine; S4. When the signal strength between the wireless network terminal and the gas sensor reaches a preset strength threshold, the wireless network terminal obtains real-time gas parameters from the gas sensor; S5. During the movement of the wireless network terminal, the wireless network terminal finds other wireless network terminals whose signal strength reaches the strength threshold with itself, and establishes a dynamic data subnet; S6. The wireless network terminals share real-time gas parameters in the dynamic data subnet; S7, when the wireless network terminal leaves the mine, sending the real-time gas parameters to the terminal management server; S8, the terminal management server sends the received real-time gas parameters to the data management server according to a preset period; S9. The data management server summarizes all acquired real-time gas parameters and generates gas monitoring results.

9. A method for real-time monitoring of gas in underground coal mines as claimed in claim 8, characterized in that: In S4 and S5, when the wireless network terminal finds the gas sensor or other wireless network terminal whose signal strength reaches the strength threshold, it sends a connection request message and waits for feedback. When the wireless network terminal receives the connection confirmation message fed back by the gas sensor or other wireless network terminal, it establishes a wireless communication connection and transmits the real-time gas parameters.

10. A method for real-time monitoring of gas in underground coal mines as claimed in claim 8, characterized in that: After receiving the real-time gas parameters, the terminal management server screens and corrects the gas monitoring values ​​based on the generation time.

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