Fire early warning system and fire early warning method for coal mine goaf

Abstract

The invention provides a fire early warning system and a fire early warning method for a coal mine goaf. The system comprises a plurality of wireless sensing terminals, at least one core communication node and a cloud platform, wherein the wireless sensing terminals are arranged at a plurality of target test environment points respectively; the core communication node is in wireless communication connection with the plurality of wireless sensing terminals and the cloud platform; the core communication node is used for issuing a timed wake-up instruction to the wireless sensing terminal; the plurality of wireless sensing terminals are used for acquiring environment related information of a target test environment point based on a timed wake-up instruction, and uploading the environment related information to the core communication node by adopting a comb network communication mode; the core communication node is also used for uploading the environment related information to the cloud platform; and the cloud platform is used for performing fire early warning on the coal mine goaf based on the environment-related information. According to the invention, the problems of severe coal mine goaf environment, difficult wiring of wired sensors, difficult returning of early warning signals, low power consumption of equipment and the like are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fire early warning, and in particular to a fire early warning system and a fire early warning method for coal mine goaf areas. Background Art

[0002] At present, the methods for fire monitoring in coal mine goafs at the early stage of fire include temperature-based fire detection technology, gas-based fire detection technology, visible light image-based fire detection technology, and vision-based solutions; among them, temperature-based fire detection technology has the defects of limited detection range and complex maintenance procedures; gas-based fire detection technology is not accurate and often causes false alarms; visible light image-based fire detection technology relies on manual observation and monitoring, with high labor costs. In actual applications, it is often the case that personnel are away from their posts and cannot accurately observe the occurrence of fires; based on vision solutions, it relies on the installation location, installation density, and visual conditions of on-site cameras, has huge blind spots and is costly. Summary of the invention

[0003] To this end, the present invention provides a fire warning system and a fire warning method for coal mine goaf areas, aiming to solve the technical problem that the prior art cannot perform high-precision fire monitoring and warning for coal mine goaf areas.

[0004] To achieve the above objectives, the present invention adopts the following technical solutions:

[0005] According to a first aspect of the present invention, the present invention provides a fire early warning system for coal mine goaf, the system comprising a plurality of wireless sensor terminals respectively arranged at a plurality of target test environment points, at least one core communication node and a cloud platform; the core communication node is wirelessly connected to the plurality of wireless sensor terminals and the cloud platform respectively;

[0006] The core communication node is used to send a timed wake-up instruction to the wireless sensor terminal;

[0007] The plurality of wireless sensor terminals are used to obtain the environment-related information of the target test environment point based on the timed wake-up instruction, and upload the environment-related information to the core communication node using a comb network communication method;

[0008] The core communication node is also used to obtain environment-related information from the plurality of wireless sensor terminals, and upload the environment-related information to the cloud platform;

[0009] The cloud platform is used to provide fire warning for the coal mine goaf based on the environment-related information.

[0010] Optionally, each of the wireless sensor terminals is sequentially arranged in the coal mine goaf at a preset distance;

[0011] The core communication node is used to send a timed wake-up instruction to each of the wireless sensor terminals, so as to wake up the wireless sensor terminals in turn to obtain environment-related information corresponding to the target test environment point;

[0012] The most remote wireless sensor terminal is used to obtain first environment-related information corresponding to the target test environment point based on the timed wake-up instruction, and send the environment-related information to at least one adjacent wireless sensor terminal in a single-shot or multi-hop manner;

[0013] The adjacent wireless sensor terminal is used to obtain the second environment-related information corresponding to the target test environment point based on the timed wake-up instruction, and send the received first environment-related information to at least one adjacent wireless sensor terminal through a single-hop or multi-hop manner, until the last wireless sensor terminal sends the environment-related information including multiple target test environment points to the core communication node.

[0014] Optionally, the wireless sensing terminal includes a first main controller, a temperature sensor, a smoke sensor and a combustible gas sensor;

[0015] The temperature sensor, the smoke sensor and the combustible gas sensor are respectively connected to the first main controller for communication;

[0016] The temperature sensor is used to collect the ambient temperature parameters of the target test environment point; the smoke sensor is used to collect the smoke concentration parameters of the target test environment point; the combustible gas sensor is used to collect the combustible gas concentration parameters of the target test environment point;

[0017] The first main controller is used to obtain the ambient temperature parameter, the smoke concentration parameter and the combustible gas concentration parameter, and perform fusion calculation on the sensor parameters to obtain the environment-related information of the target test environment point.

[0018] Optionally, the wireless sensor terminal further includes a first wireless communication module;

[0019] The first main controller is used to transmit the environment-related information to other wireless sensor terminals or the core communication node through the first wireless communication module.

[0020] Optionally, the core communication node includes a second main controller, a second wireless communication module, a 4G / 5G communication module and / or an ETH Ethernet interface;

[0021] The core communication node is connected to the cloud platform through a 4G / 5G communication module and / or an ETH Ethernet interface;

[0022] The core communication node receives the environment-related information from the wireless sensor terminal through the second wireless communication module.

[0023] Optionally, the wireless sensor terminal further includes a battery;

[0024] The battery is used to supply power to the first main controller, the temperature sensor, the smoke sensor and the combustible gas sensor.

[0025] Optionally, the wireless sensor terminal further includes a posture sensor;

[0026] The attitude sensor includes at least one of a three-axis gyroscope, a three-axis accelerometer and a three-axis electronic compass, and is used to monitor environmental changes of the target test environment point.

[0027] Optionally, the first wireless communication module uses a circuit board microstrip antenna and is connected to the first main controller via a feeder;

[0028] The wireless communication module used by the first wireless communication module includes at least one of Lora, Bluetooth, RFID, NB-IoT, 4G, 5G and star flash light wireless communication technology.

[0029] Optionally, the data format of the environment-related information includes a starting bit device ID, data information and a check bit;

[0030] The data information includes data codes obtained by converting ambient temperature parameters, smoke concentration parameters and combustible gas concentration parameters in a fixed format.

[0031] According to a second aspect of the present invention, the present invention provides a fire warning method, which is applied to the fire warning system as described in any one of the first aspects of the present invention, and the method comprises:

[0032] Multiple wireless sensor terminals are sequentially arranged at preset intervals in the coal mine goaf; a timed wake-up instruction is sent to the wireless sensor terminal by using a core communication node;

[0033] The plurality of wireless sensor terminals respond to the timed wake-up instruction, obtain the environment-related information of the target test environment point, and upload the environment-related information to the core communication node by using a comb network communication method;

[0034] Using the core communication node to obtain environment-related information from the plurality of wireless sensor terminals, and uploading the environment-related information to a cloud platform;

[0035] The cloud platform is used to analyze the environmental related information of multiple target test environment points to provide fire warning for the coal mine goaf.

[0036] The present invention adopts the above technical solution and has at least the following beneficial effects:

[0037] Through the scheme of the present invention, a wireless fire monitoring and early warning system suitable for coal mine goaf is proposed, including multiple wireless sensor terminals respectively arranged at multiple target test environment points, at least one core communication node and a cloud platform; the core communication node is wirelessly connected to the multiple wireless sensor terminals and the cloud platform respectively; the core communication node is used to issue a timed wake-up instruction to the wireless sensor terminal; the multiple wireless sensor terminals are used to obtain environmental related information of the target test environment point based on the timed wake-up instruction, and upload the environmental related information to the core communication node using a comb network communication method; the core communication node is also used to obtain environmental related information from the multiple wireless sensor terminals, and upload the environmental related information to the cloud platform; the cloud platform is used to issue a fire early warning for the coal mine goaf based on the environmental related information. Through the present invention, a multi-sensor fusion method such as temperature, smoke, and combustible gas is adopted to collect environmental information of the test point; it is transmitted to the main controller in real time by wireless means, and the relevant data is stored in the cloud. Low-cost sensors can be deployed in batches to monitor the goaf environment in real time and automatically alarm abnormal areas. With the cooperation of relevant processing mechanisms, good detection and early warning effects are achieved, which solves the problems of harsh goaf environment in coal mines, difficult wiring of wired sensors, difficult feedback of early warning signals, and low power consumption of equipment.

[0038] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] 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.

[0040] Figure 1 A schematic diagram showing the structure of a fire warning system provided by an embodiment of the present invention is shown;

[0041] Figure 2 A schematic diagram of the structure of a wireless sensor terminal provided by an embodiment of the present invention is shown;

[0042] Figure 3 A schematic diagram showing the structure of a core communication node provided by an embodiment of the present invention is shown;

[0043] Figures 4a to 4cA schematic diagram of a communication link of a fire warning system provided by an embodiment of the present invention is shown;

[0044] Figure 5 A schematic flow chart of a fire warning method provided in accordance with an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0045] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0047] The embodiment of the present invention provides a fire warning system for coal mine goaf, such as Figure 1 As shown, it includes multiple wireless sensor terminals 101, at least one core communication node 201 and a cloud platform 301.

[0048] Among them, multiple wireless sensor terminals 101 are sequentially arranged at multiple target test environment points in the coal mining area according to preset intervals, and are used to collect environmental related information of the target test environment points. The core communication node 201 serves as a data forwarding node for multiple wireless sensor terminals 101, and is responsible for data reception, forwarding and network access of the wireless sensor terminals 101. In the fire warning system in the embodiment of the present invention, multiple core communication nodes 201 can be set, and each core communication node 201 is responsible for data forwarding of multiple wireless sensor terminals 101 within a certain range, thereby forwarding environmental related information to the cloud platform 301 in a relay manner. The cloud platform 301 is responsible for monitoring and analyzing environmental related information of multiple target test environment points to provide abnormal warnings for coal mine goafs.

[0049] It should be noted that after the coal mine goaf collapses, the communication distance of most wireless communication technologies will decrease exponentially due to the cover of the coal seam. According to existing experiments and tests, most wireless communication distances in coal media are less than 2m, and the worst 4G / 5G distance is only within 1m. Based on the specific environment of the embodiment of the present invention, a core communication node 210 is set to relay data for the wireless sensor terminal 101.

[0050] Specifically, for real-time monitoring of coal mine goafs, a timed wake-up instruction can be issued to the wireless sensor terminal 101 based on the core communication node 210; multiple wireless sensor terminals 101 obtain environmental related information of the target test environment point based on the timed wake-up instruction, and upload the environmental related information to the core communication node 201 using a comb network communication method; the core communication node 201 obtains environmental related information from multiple wireless sensor terminals, and uploads the environmental related information to the cloud platform 301, and the cloud platform 301 performs related analysis, storage, fire warning and other tasks.

[0051] Furthermore, if Figure 2 As shown, the wireless sensor terminal 101 in the embodiment of the present invention may include a first main controller 102, a temperature sensor 103, a smoke sensor 104 and a combustible gas sensor 105. Among them, the first main controller 102 may be a controller with a wireless transceiver function, which is used to realize the collection and calculation of various parameter data and the transmission and reception of wireless data. The temperature sensor 103 is used to collect the ambient temperature parameters of the target test environment point; the smoke sensor 104 is used to collect the smoke concentration parameters of the target test environment point; and the combustible gas sensor 105 is used to collect the combustible gas concentration parameters of the target test environment point. The first main controller 102 can also be used to configure the working status of the temperature sensor 103, the smoke sensor 104, and the combustible gas sensor 105, obtain the ambient temperature parameters, the smoke concentration parameters and the combustible gas concentration parameters, and perform fusion calculation on the sensor parameters to obtain the environment-related information of the target test environment point, and send the environment-related information to the core communication node 201.

[0052] In addition, the wireless sensor terminal 101 may also include a battery 106 and a first wireless communication module 107. The battery 106 is used to power the first main controller 102, the temperature sensor 103, the smoke sensor 104 and the combustible gas sensor 105. The first main controller 102 is used to transmit environment-related information to other wireless sensor terminals 101 or core communication nodes 201 through the first wireless communication module 107. Specifically, the first wireless communication module 107 can use a circuit board microstrip antenna and be connected to the first main controller 102 by means of a feeder; the wireless communication modules used by the first wireless communication module 107 include Lora, Bluetooth, RFID, NB-IoT, 4G, 5G and star flash light wireless communication technology. Preferably, Lora communication is relatively good, and the wireless communication distance in the coal medium can reach 3 to 5 meters.

[0053] Furthermore, if Figure 3 As shown, the core communication node 201 in the embodiment of the present invention may include a second main controller 202, a second wireless communication module 203, a 4G / 5G communication module 204 and / or an ETH Ethernet interface 205; the core communication node 201 is communicatively connected to the cloud platform 301 via the 4G / 5G communication module 204 and / or the ETH Ethernet interface 205; the core communication node 201 receives environment-related information from the wireless sensor terminal 101 via the second wireless communication module 203.

[0054] Furthermore, the comb network communication method adopted in the embodiment of the present invention is described in detail:

[0055] like Figure 1 As shown, in the embodiment of the present invention, multiple wireless sensor terminals 101 are sequentially arranged in the coal mine goaf at a preset distance. When performing data monitoring, the core communication node 201 is used to send a timed wake-up instruction to each wireless sensor terminal 101 to wake up the wireless sensor terminal 101 in sequence to obtain the environment-related information of the corresponding target test environment point; the farthest wireless sensor terminal 101 is used to obtain the first environment-related information of the corresponding target test environment point based on the timed wake-up instruction, and send the environment-related information to at least one adjacent wireless sensor terminal 101 in a single-challenge or multi-hop manner; the adjacent wireless sensor terminal 101 is used to obtain the second environment-related information of the corresponding target test environment point based on the timed wake-up instruction, and send the first environment-related information received to at least one adjacent wireless sensor terminal 101 in a single-challenge or multi-hop manner, until the last wireless sensor terminal 101 sends the environment-related information including multiple target test environment points to the core communication node 201. Finally, the cloud platform 301 receives the environment-related information of multiple target test environment points in the coal mine goaf to monitor abnormal data, and alarm and process the abnormal data.

[0056] It should be noted that the communication link in the embodiment of the present invention can be freely configured according to actual needs, that is, point-to-point chain links, single-hop and multi-hop self-organizing network modes can be implemented for communication, and the data transmission of the wireless sensor terminal 101 can also be unilaterally transmitted or transmitted on both sides at the same time. As shown in Figure 4, it is a schematic diagram of the communication link between wireless sensor terminals. Among them, Figure 4a and Figure 4b For one-sided transmission, Figure 4c It is transmitted simultaneously on both sides. It can be understood that due to the special application environment of the present invention, it is buried in a mine, the wireless communication is poor, and the reliability of wired communication is low, so a wireless communication method with low data volume is applicable. Preferably, the distance between each adjacent wireless transmission terminal 101 is set to be less than or equal to 3m. In practical applications, the communication link constructed by the embodiment of the present invention can preferentially communicate in a single-hop manner, that is, transmitted by relay. In other words, when the overall communication in the coal mine goaf is good, that is, no wireless sensor terminal 101 fails, multiple wireless transmission terminals 101 at the remote end can transmit data to either side or to both sides at the same time through a single-hop relay mode, and the wireless transmission terminals 101 set in the air intake and return air lanes of the coal mine goaf send the joint data to the core communication node 201; and when the communication state is poor, for example, one or several wireless transmission terminals 101 in the middle fail and lose connection, the adjacent wireless transmission terminal 101 can transmit data through the communication link on the other side. Therefore, even if some wireless transmission terminals 101 fail to communicate, the present invention can still ensure real-time fire monitoring and early warning, greatly improving the stability of the system. In addition, the cloud platform 301 can also locate the failed or disconnected wireless transmission terminal 101 based on the data information sent back by the core communication node 201, so that the staff can perform maintenance in time. In summary, the comb network communication method constructed by the embodiment of the present invention can not only ensure the stable communication of the overall system, but also achieve the balance of equipment power and data between multiple wireless sensor terminals, avoiding large data volume and excessive power consumption of a single node.

[0057] The data format of the environment-related information in the embodiment of the present invention can be a starting bit device ID + data information + check bit, wherein the data information can include ambient temperature parameters, smoke concentration parameters and combustible gas concentration parameters encoded in a fixed format. A single sensor transmits sensor information according to the encoding format, and aggregates the joint environment-related information to the cloud platform 301.

[0058] Furthermore, as an extension of the embodiment of the present invention, the wireless sensor terminal 101 may also be provided with a posture sensor. The posture sensor may be a three-axis gyroscope, a three-axis accelerometer, a three-axis electronic compass, etc., which are used to monitor the environmental changes of the target test environment point, so as to more accurately monitor the environmental changes of the coal mine goaf. In addition, in practical applications, the shell of the wireless sensor terminal 101 adopts IP65 protection grade and low power consumption design, and the design standard refers to the mine safety and coal safety design. The installation method can adopt gluing to fix the equipment and the rotating shaft.

[0059] In view of the communication characteristics of underground mines, the present invention proposes a fire warning system for coal mine goaf areas, which integrates multiple sensors and performs multi-sensor data fusion to improve detection sensitivity and reduce the risk of false alarms, solving the problems of harsh coal mine goaf environment, difficult wiring of wired sensors, difficult return of warning signals, and low power consumption of equipment. The present invention has at least the following advantages:

[0060] ①Adopt wireless communication to reduce wiring and save costs;

[0061] ②Using low power consumption solutions, the equipment can work normally for 2 years or even longer, and can support working time of more than 8 years at most;

[0062] ③Use low-cost solutions such as common sensors, which can be deployed in batches and installed flexibly;

[0063] ④The system facilities are simple to install and easy to maintain.

[0064] Furthermore, the embodiment of the present invention also provides a method for applying Figure 1 The fire warning method of the fire warning system shown includes steps S501 to S504:

[0065] Step S501, multiple wireless sensor terminals are sequentially arranged at preset intervals in the coal mine goaf; a timed wake-up instruction is sent to the wireless sensor terminal by using a core communication node;

[0066] Step S502, multiple wireless sensor terminals respond to the timed wake-up instruction, obtain environment-related information of the target test environment point, and upload the environment-related information to the core communication node using a comb network communication method;

[0067] Step S503, using the core communication node to obtain environment-related information from multiple wireless sensor terminals, and uploading the environment-related information to the cloud platform;

[0068] Step S504, using the cloud platform to analyze the environmental related information of multiple target test environment points to issue a fire warning for the coal mine goaf.

[0069] It should be noted that the specific implementation of each step in the fire warning method provided in the embodiment of the present invention can be referred to Figure 1 The corresponding description of the functional modules in the shown system will not be repeated here.

[0070] Those skilled in the art can clearly understand that the specific working processes of the systems, devices, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and for the sake of brevity, they are not further described here.

[0071] In addition, the functional units in various embodiments of the present invention may be physically independent of each other, or two or more functional units may be integrated together, or all functional units may be integrated into one processing unit. The above integrated functional units may be implemented in the form of hardware, or in the form of software or firmware.

[0072] Those skilled in the art can understand that if the integrated functional unit is implemented in the form of software and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention can essentially or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, which includes a number of instructions to enable a computing device (such as a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention when running the instructions. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes.

[0073] Alternatively, all or part of the steps of the aforementioned method embodiments can be implemented by hardware related to program instructions (such as computing devices such as personal computers, servers, or network devices), and the program instructions can be stored in a computer-readable storage medium. When the program instructions are executed by the processor of the computing device, the computing device executes all or part of the steps of the methods described in the embodiments of the present invention. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that within the spirit and principles of the present invention, the technical solutions recorded in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not make the corresponding technical solutions deviate from the protection scope of the present invention.

Claims

1. A fire warning system for coal mine goaf, characterized in that: The system comprises a plurality of wireless sensor terminals, at least one core communication node and a cloud platform respectively arranged at a plurality of target test environment points; the core communication node is wirelessly connected to the plurality of wireless sensor terminals and the cloud platform respectively; The core communication node is used to send a timed wake-up instruction to the wireless sensor terminal; The plurality of wireless sensor terminals are used to obtain the environment-related information of the target test environment point based on the timed wake-up instruction, and upload the environment-related information to the core communication node using a comb network communication method; The core communication node is also used to obtain environment-related information from the plurality of wireless sensor terminals, and upload the environment-related information to the cloud platform; The cloud platform is used to provide fire warning for the coal mine goaf based on the environment-related information.

2. The system according to claim 1, characterized in that The wireless sensor terminals are sequentially arranged in the coal mine goaf at preset intervals; The core communication node is used to send a timed wake-up instruction to each of the wireless sensor terminals, so as to wake up the wireless sensor terminals in turn to obtain environment-related information corresponding to the target test environment point; The most remote wireless sensor terminal is used to obtain first environment-related information corresponding to the target test environment point based on the timed wake-up instruction, and send the environment-related information to at least one adjacent wireless sensor terminal in a single-shot or multi-hop manner; The adjacent wireless sensor terminal is used to obtain the second environment-related information corresponding to the target test environment point based on the timed wake-up instruction, and send the received first environment-related information to at least one adjacent wireless sensor terminal through a single-hop or multi-hop manner, until the last wireless sensor terminal sends the environment-related information including multiple target test environment points to the core communication node.

3. The system according to claim 1, characterized in that The wireless sensor terminal includes a first main controller, a temperature sensor, a smoke sensor and a combustible gas sensor; The temperature sensor, the smoke sensor and the combustible gas sensor are respectively connected to the first main controller for communication; The temperature sensor is used to collect the ambient temperature parameters of the target test environment point; the smoke sensor is used to collect the smoke concentration parameters of the target test environment point; the combustible gas sensor is used to collect the combustible gas concentration parameters of the target test environment point; The first main controller is used to obtain the ambient temperature parameter, the smoke concentration parameter and the combustible gas concentration parameter, and perform fusion calculation on the sensor parameters to obtain the environment-related information of the target test environment point.

4. The system according to claim 3, characterized in that The wireless sensor terminal also includes a first wireless communication module; The first main controller is used to transmit the environment-related information to other wireless sensor terminals or the core communication node through the first wireless communication module.

5. The system according to claim 1, characterized in that The core communication node includes a second main controller, a second wireless communication module, a 4G / 5G communication module and / or an ETH Ethernet interface; The core communication node is connected to the cloud platform through a 4G / 5G communication module and / or an ETH Ethernet interface; The core communication node receives the environment-related information from the wireless sensor terminal through the second wireless communication module.

6. The system according to claim 3, characterized in that The wireless sensor terminal also includes a battery; The battery is used to supply power to the first main controller, the temperature sensor, the smoke sensor and the combustible gas sensor.

7. The system according to claim 3, characterized in that The wireless sensor terminal also includes a posture sensor; The attitude sensor includes at least one of a three-axis gyroscope, a three-axis accelerometer and a three-axis electronic compass, and is used to monitor environmental changes of the target test environment point.

8. The system according to claim 4, characterized in that The first wireless communication module uses a circuit board microstrip antenna and is connected to the first main controller via a feeder; The wireless communication module used by the first wireless communication module includes at least one of Lora, Bluetooth, RFID, NB-IoT, 4G, 5G and star flash light wireless communication technology.

9. The system according to any one of claims 1 to 7, characterized in that: The data format of the environment related information includes a starting bit device ID, data information and a check bit; The data information includes data codes obtained by converting ambient temperature parameters, smoke concentration parameters and combustible gas concentration parameters in a fixed format.

10. A fire early warning method, characterized in that: Applied to the fire warning system according to any one of claims 1 to 9, the method comprises: Multiple wireless sensor terminals are sequentially arranged at preset intervals in the coal mine goaf; a timed wake-up instruction is sent to the wireless sensor terminal by using a core communication node; The plurality of wireless sensor terminals respond to the timed wake-up instruction, obtain the environment-related information of the target test environment point, and upload the environment-related information to the core communication node by using a comb network communication method; Using the core communication node to obtain environment-related information from the plurality of wireless sensor terminals, and uploading the environment-related information to a cloud platform; The cloud platform is used to analyze the environmental related information of multiple target test environment points to provide fire warning for the coal mine goaf.

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