Movable moisture-proof gas detection device and use method thereof

Abstract

The invention discloses a movable moisture-proof gas detection device and a use method thereof. Comprising an explosion-proof and moisture-proof shell with holes densely distributed in the whole body, the interior of the explosion-proof and moisture-proof shell is divided into an upper electric appliance cabin and a lower sensor cabin through a physical barrier plate, a wireless communication and processing module, a battery module and a motor are installed in the upper electric appliance cabin, and an output shaft of the motor extends into the lower sensor cabin and is connected with a fan. A gas detection device and a porous breathable drying agent tray are further arranged in the lower sensor cabin, a display alarm device is arranged on the surface of the anti-explosion and moisture-proof shell, and the bottom of the anti-explosion and moisture-proof shell is connected with an external movable support through a support fixing connector. A three-dimensional mine gas safety protection closed loop from accurate sensing and advanced early warning to rapid cooperative response is constructed through active moisture-proof and flexible deployment design of a hardware level and in combination with an edge intelligence and cooperative early warning algorithm of a software level, and the active defense capability and intelligent management level of a mine for dealing with gas disasters are remarkably improved.

Description

Technical Field

[0001] This invention relates to a portable moisture-proof gas detection device and its usage method, belonging to the technical field of gas detection equipment. Background Technology

[0002] The underground mining environment is complex, and gas hazards such as methane, carbon monoxide, hydrogen sulfide, and abnormal oxygen concentrations are major safety threats. Currently, mine gas monitoring mainly relies on two types of equipment: fixed online monitoring systems and portable detectors. However, both types of equipment have certain shortcomings when dealing with the extreme environments of underground mining, such as humidity, dust, and variable spatial conditions, and cannot meet the demands of modern mines for flexible, reliable, and intelligent safety monitoring.

[0003] In terms of environmental adaptability, existing equipment lacks sufficient moisture resistance, especially in underground areas such as mining faces, return air corners, and drainage points. Current mainstream electrochemical and catalytic combustion gas sensors suffer from electrolyte dilution and electrode corrosion in high-humidity environments, leading to signal drift, prolonged response time, and frequent false alarms. Regarding monitoring modes, there is a contradiction between "mobility" and "area monitoring capability." Portable four-in-one detectors carried by miners are flexible but their monitoring range is limited to their immediate surroundings, failing to provide effective continuous spatial monitoring of a working face, a roadway, or an entire refuge chamber. Equipment with area monitoring capabilities is often bulky, making transport and installation extremely inconvenient in low, narrow, and cluttered underground roadways, hindering rapid and flexible deployment as the working face advances.

[0004] Therefore, downhole safety monitoring requires an innovative device that can overcome the humid environment in the downhole environment, combine portability with the spatial coverage capability of regional monitoring equipment, and achieve early warning. Summary of the Invention

[0005] The purpose of this invention is to provide a portable, moisture-proof gas detection device for mining. It can overcome the humid environment underground, combining portability with the spatial coverage capability of area monitoring equipment, and enabling early warning.

[0006] The technical solution of the present invention: A portable moisture-proof gas detection device includes an explosion-proof and moisture-proof outer shell with numerous holes all over its body. The interior of the explosion-proof and moisture-proof outer shell is divided into an upper electrical compartment and a lower sensor compartment by a physical barrier plate. The upper electrical compartment is equipped with a wireless communication and processing module, a battery module and a motor. The output shaft of the motor extends into the lower sensor compartment and is connected to a fan. The lower sensor compartment is also equipped with a gas detection device and a porous breathable desiccant tray. The surface of the explosion-proof and moisture-proof outer shell is equipped with a display and alarm device. The bottom of the explosion-proof and moisture-proof outer shell is connected to an external movable bracket via a bracket fixing interface.

[0007] In the aforementioned portable moisture-proof gas detection device, a side dustproof mesh is fixed inside the explosion-proof and moisture-proof outer shell of the lower sensor compartment, and a bottom dustproof mesh is fixed at the bottom of the explosion-proof and moisture-proof outer shell. The fan, gas detection equipment, and porous breathable desiccant tray are arranged in the cavity surrounded by the side dustproof mesh and the bottom dustproof mesh.

[0008] In the aforementioned portable moisture-proof gas detection device, the motor extends into the output shaft of the lower sensor compartment and is fitted with a protective tube. A porous, breathable desiccant disc and a gas detection device are sequentially fitted onto the protective tube from bottom to top. The side dustproof mesh and the bottom dustproof mesh are made of hydrophobic filter mesh, and a nano-hydrophobic breathable membrane is installed on the inner side of the filter mesh.

[0009] In the aforementioned portable moisture-proof gas detection device, the external movable support is a triangular telescopic leg structure, a strong magnetic chuck structure, or a suspension structure. When it is a suspension structure, the external movable support includes a threaded connector, the other end of which is connected to a metal hook, and the metal hook is provided with an anchor rod interface. When it is a strong magnetic chuck structure, the external movable support includes a threaded connecting rod, the bottom of which is connected to a mounting base, and a movable connecting rod is hinged to the mounting base. The other end of the movable connecting rod is hinged to a high magnetic base.

[0010] In the aforementioned portable moisture-proof gas detection device, the porous breathable desiccant tray includes a porous detachable tray, in which a highly absorbent desiccant is placed and the surface is covered with a breathable mesh.

[0011] In the aforementioned portable moisture-proof gas detection device, the gas detection equipment includes a modular sensor array, which consists of multiple independent smart sensor slots, and the array includes at least a catalytic combustion sensor and an electrochemical sensor.

[0012] In the aforementioned portable moisture-proof gas detection device, the display alarm device includes an ultra-bright LED multi-color indicator light, a high-decibel buzzer, and a vibration motor; The wireless communication and processing module includes an intelligent early warning algorithm unit and a device self-test and lifespan prediction unit. The intelligent early warning algorithm unit can analyze gas concentration data based on time series and predict the concentration development in a specific future time period based on its changing trend before the gas concentration reaches a preset alarm threshold, and issue a trend warning signal. The device self-test and lifespan prediction unit is used to periodically and automatically perform sensor baseline calibration and performance diagnosis, predict its remaining lifespan by analyzing the sensor signal attenuation characteristics, and generate maintenance prompt information.

[0013] A method of using the aforementioned portable moisture-proof gas detection device specifically includes the following steps: S1: Flexible deployment: Select the appropriate deployment mode according to the terrain and structure of the area to be monitored: ground area monitoring mode, equipment attachment monitoring mode or ceiling space monitoring mode, and ensure that the power is on; S2: Self-test and networking: After the device starts up, it automatically performs sensor and system self-tests, and automatically connects to the mine safety monitoring network via Wi-Fi, reporting its device ID, location status and self-test results; S3: Continuous monitoring and intelligent analysis: The device continuously samples the ambient gas; the wireless communication and processing module processes the data in real time and runs an intelligent early warning algorithm to predict the trend of slowly changing gas risks; S4: Tiered alarm and information synchronization: When the gas concentration is detected to reach the preset threshold or a significant dangerous trend is identified, the device immediately activates the corresponding level of local audible, visual and vibration alarm; at the same time, the alarm event, real-time data and location information are synchronously uploaded to the monitoring center through the wireless communication and processing module and broadcast to the relevant mobile inspection terminals in the system. S5: Data Management and Maintenance: Monitoring data is continuously stored locally on the device and uploaded to the cloud; the monitoring platform arranges planned maintenance based on the received device self-inspection and life prediction information, and replaces sensor modules with degraded performance in advance.

[0014] In the aforementioned method of using a portable moisture-proof gas detection device, the intelligent early warning algorithm in step S3 specifically involves: using historical concentration data sequences and through exponential smoothing or ARIMA time series models, predicting the trajectory of a specific gas concentration change within a certain future time period; and triggering a trend warning when the predicted concentration is likely to exceed a low-level alarm threshold.

[0015] The beneficial effects of the present invention are as follows: Compared with the prior art, the mobile moisture-proof gas detection device for mining provided by the present invention integrates moisture-proof technology, multi-gas sensing, intelligent early warning algorithm and flexible mobile deployment method, and can reliably, continuously and intelligently monitor various dangerous gases in the humid environment underground.

[0016] Its core innovations are mainly reflected in the following aspects: First, a porous, breathable desiccant tray was designed, which combines moisture protection with the function of gas passage.

[0017] Second, the concept of "mobile area monitoring" was proposed. The device can be deployed in various flexible ways through a detachable external bracket, combining portability with continuous area monitoring capabilities.

[0018] Third, it is equipped with intelligent algorithms that have trend warning and equipment self-test functions. It can predict concentration trends based on historical data, provide early warnings, assess sensor lifespan, and support predictive maintenance.

[0019] Fourth, this invention has modular gas sensors for catalytic combustion and electrochemistry, which can continuously monitor multiple gases such as CH4, O, and CO, and upload the data in real time via wireless network.

[0020] The significant advantages of the device of the present invention are strong environmental adaptability, flexible deployment and high degree of intelligence, providing a reliable, intelligent and integrated gas safety monitoring solution for key areas such as underground mining faces, return airways and temporary refuge chambers.

[0021] In summary, the equipment and method provided by this invention, through proactive moisture protection and flexible deployment design at the hardware level, combined with edge intelligence and collaborative early warning algorithms at the software level, construct a three-dimensional closed loop for mine gas safety protection, from accurate perception and advanced early warning to rapid collaborative response, which significantly improves the mine's proactive defense capabilities and intelligent management level in the face of gas disasters. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention (the external movable support is a triangular telescopic support leg structure). Figure 2 for Figure 1 Cross-sectional view without external movable support; Figure 3 This is a schematic diagram of the connection structure between the motor and the fan; Figure 4 This is a schematic diagram of the structure of a porous, breathable desiccant disc; Figure 5 This is a structural diagram of an external movable support structure that is suspended. Figure 6 This is a structural diagram of an external movable support with a strong magnetic chuck structure.

[0023] Reference numerals: 1. Explosion-proof and moisture-proof shell; 2. Wireless communication and processing module; 3. Physical barrier plate; 4. Side dustproof mesh; 5. Gas detection equipment; 6. Fan; 7. Bracket fixing interface; 8. Bottom dustproof mesh; 9. Porous breathable desiccant tray; 10. Protective tube; 11. Battery module; 12. Motor; 13. Display and alarm device; 14. External movable bracket; 15. Threaded connector; 16. Metal hook; 17. Anchor bolt interface; 18. Movable connecting rod; 19. Threaded connecting rod; 20. High magnetic base. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0025] An embodiment of the present invention: A portable moisture-proof gas detection device includes an explosion-proof and moisture-proof outer shell 1 with numerous holes all over its body. The interior of the explosion-proof and moisture-proof outer shell 1 adopts a chamber isolation design, which is divided into an upper electrical compartment and a lower sensor compartment by a physical barrier plate 3. The upper electrical compartment is equipped with a wireless communication and processing module 2, a battery module 11 and a motor 12. The output shaft of the motor 12 extends into the lower sensor compartment and is connected to a fan 6. The lower sensor compartment is also equipped with a gas detection device 5 and a porous breathable desiccant tray 9. The surface of the explosion-proof and moisture-proof outer shell 1 is equipped with a display alarm device 13. The bottom of the explosion-proof and moisture-proof outer shell 1 is connected to an external movable bracket 14 via a bracket fixing interface 7.

[0026] During operation, the battery module 11 provides the necessary power to the internal electrical equipment. The motor 12 rotates, driving the fan 6 to circulate ambient gas, allowing external gases to enter the casing through the openings in the explosion-proof and moisture-proof housing 1. The gas detection device 5 detects various gas concentration parameters in the environment and feeds the data back to the wireless communication and processing module 2. The wireless communication and processing module 2 processes the data from the gas detection device 5 and controls the entire system operation. It can also transmit data to the monitoring center via wireless communication. The display and alarm device 13 displays information and provides alarm indications. The movable bracket 14 is detachably connected to the bottom of the explosion-proof and moisture-proof housing 1, allowing for flexible deployment. A porous, breathable desiccant tray 9 is placed in the lower sensor compartment to absorb moisture from the air entering the housing, preventing moisture from affecting the internal electronic equipment. The upper electrical compartment and the lower sensor compartment are separated by a physical barrier plate 3. Cables are connected between the compartments via sealed interfaces to prevent the spread of moisture and dust between them.

[0027] The lower sensor compartment has a side dustproof mesh 4 fixed inside its explosion-proof and moisture-proof outer shell 1, and a bottom dustproof mesh 8 fixed at its bottom. A fan 6, a gas detection device 5, and a porous, breathable desiccant tray 9 are arranged within the cavity formed by the side dustproof mesh 4 and the bottom dustproof mesh 8. This allows gas to enter the explosion-proof and moisture-proof outer shell 1 from the bottom or side, while the dustproof mesh prevents dust from entering the shell and affecting internal instruments and components.

[0028] The motor 12 extends into the output shaft of the lower sensor compartment and is fitted with a protective tube 10. A porous, breathable desiccant disc 9 and a gas detection device 5 are sequentially fixed to the protective tube 10 from bottom to top. When it is necessary to replace the desiccant in the porous, breathable desiccant disc 9 or the sensor module on the gas detection device 5, the bracket fixing interface 7 and the bottom dustproof mesh 8 at the bottom of the explosion-proof and moisture-proof housing 1 are removed, and the fan 6 is disassembled. This allows the protective tube 10 to be removed, facilitating the replacement of the desiccant and sensor module, and making installation relatively convenient. Furthermore, this structure allows gas from the external environment to first enter the area where the fan 6 is located under the action of the fan 6, and then flow towards the porous, breathable desiccant disc 9. During the process of the gas passing through the porous, breathable desiccant disc 9, the highly absorbent desiccant inside absorbs the moisture. Finally, the dried gas enters the area where the gas detection device 5 is located and is discharged outwards from the side dustproof mesh 4 and the holes on the explosion-proof and moisture-proof housing 1.

[0029] The external movable support 14 can be a triangular telescopic leg structure, a strong magnetic chuck structure, or a suspension structure. The triangular telescopic leg structure is a conventional structure, and its specific structure will not be described in detail here. When it is a suspension structure, the external movable support 14 includes a threaded connector 15, the other end of which is connected to a metal hook 16, and the metal hook 16 is provided with an anchor bolt interface 17. When it is a strong magnetic chuck structure, the external movable support 14 includes a threaded connecting rod 19, the bottom of which is connected to a mounting base. A movable connecting rod 18 is hinged to the mounting base, and the other end of the movable connecting rod 18 is hinged to a high-magnetic base 20. The support fixing interface 7 is provided with a threaded interface, which facilitates the connection of external movable supports 14 with different structural forms. This device can select a suitable deployment mode according to the site physical environment, and different deployment modes are matched with different external movable supports 14. When in ground area monitoring mode, the external movable support 14 adopts a triangular telescopic support leg structure; when in equipment attachment monitoring mode, the external movable support 14 adopts a strong magnetic chuck structure; when in ceiling space monitoring mode, the external movable support 14 adopts a suspension structure.

[0030] The triangular telescopic outrigger structure includes three independently adjustable support rods, each hinged to a connecting base. The connecting base is detachably fixed to the bottom of the housing. By adjusting the length and angle of the outriggers, the device can stand stably on uneven ground. The entire device weighs 3-5 kg, and when using the triangular telescopic outrigger structure, the height of the device is continuously adjustable within the range of 0.5 m to 1.5 m.

[0031] The strong magnetic chuck structure is connected to the bracket fixing interface 7 via a threaded connecting rod 19, and the high magnetic base 20 is used to firmly attach the device to the roadway metal support, mine car, ventilation duct, or other ferromagnetic surface. During the adsorption process, the device can be kept in a vertical position by rotating the movable connecting rod 18.

[0032] The suspension mechanism is connected to the bracket fixing interface 7 via the threaded connector 15, suspending the device on the anchor rod, cable or specially set hanging point at the top of the roadway, so that the device is in an inverted state.

[0033] The porous, breathable desiccant tray 9 includes a porous, detachable tray containing a highly absorbent desiccant and covered with a breathable mesh. Gas passing through the porous, detachable tray is absorbed by the highly absorbent desiccant and then discharged through the breathable mesh. This structure also allows for rapid replacement of the highly absorbent desiccant.

[0034] The gas detection device 5 includes a modular sensor array consisting of multiple independent smart sensor slots, supporting hot-swapping and replacement of sensors. The array includes at least a catalytic combustion sensor for detecting methane and combustible gases; an electrochemical sensor for detecting oxygen, carbon monoxide, and hydrogen sulfide; and an anti-condensation electrochemical sensor for detecting nitrogen dioxide.

[0035] The display alarm device 13 enables human-machine interaction, including a high-brightness anti-glare touchscreen for real-time display of gas concentrations, temperature and humidity, battery power, and system alarm information; it also includes an alarm module comprising ultra-bright multi-color LED indicator lights, a high-decibel buzzer, and a vibration motor, collectively providing sound, light, and vibration alarms. The alarm module responds to commands from the wireless communication and processing module 2, triggering different alarm modes based on the severity of the event, including a flashing blue signal indicating a trend warning, an intermittent yellow alarm indicating a safety alert, and a continuous, strong sound, light, and vibration alarm indicating an excessive danger level.

[0036] The battery module 11 includes: an intrinsically safe high-capacity lithium-ion battery pack, a wired fast charging interface, and a power management unit. The power management unit is responsible for charge and discharge control, power monitoring, and overcharge and over-discharge protection.

[0037] The wireless communication and processing module 2 includes an intelligent early warning algorithm unit and a device self-test and lifespan prediction unit. The intelligent early warning algorithm unit can analyze gas concentration data based on time series and predict the concentration development in a specific future time period based on its changing trend before the gas concentration reaches a preset alarm threshold, and issue a trend warning signal. The device self-test and lifespan prediction unit is used to periodically and automatically perform sensor baseline calibration and performance diagnosis, predict its remaining lifespan by analyzing the sensor signal attenuation characteristics, and generate maintenance prompt information.

[0038] The portable moisture-proof gas detection device of the present invention can be combined with a mine safety production monitoring center and a mobile inspection terminal to form a complete mine gas safety monitoring system. The portable moisture-proof gas detection device serves as a regional monitoring node, an underground wireless communication gateway or base station, and is used to collect data from various monitoring nodes. The mine safety production monitoring center receives data from underground and performs storage, analysis, display and remote control. The mobile inspection terminal receives local broadcast alarm information and forwards data from the device of the present invention.

[0039] The system platform based on the device components of this invention can receive and process sensor life prediction information uploaded by the device, and automatically generate equipment maintenance work orders and spare parts procurement suggestions.

[0040] This invention relates to a mine safety monitoring terminal. Its core design concept is to achieve reliable, flexible, and intelligent regional gas safety monitoring in extremely harsh mine environments (high humidity, high dust levels, and confined space). The device overcomes the shortcomings of traditional portable devices, which are limited to personal protection, and fixed equipment, which involves complex installation. It creatively adopts a "mobile regional monitoring station" design. The entire unit has a compact structure, weighs between 3 and 5 kilograms, and possesses protection ratings and intrinsically safe certification for mining, ensuring absolute safety in flammable and explosive environments.

[0041] The main components and system of the device of the present invention include: 1. Active intelligent moisture-proof subsystem First layer: Physical barrier protection The air inlet of the equipment is equipped with hydrophobic filter screens (side dustproof screen 4 and bottom dustproof screen 8), which can filter dust and intercept most water mist. A nano-hydrophobic and breathable membrane is installed at the end of the filter screen. The pore size of this membrane is about 0.2 micrometers, allowing small molecule gases such as O2, CH4, and CO to pass through quickly, but effectively blocking liquid water droplets and water mist, preventing water droplets from wetting and adhering.

[0042] Second layer: Active dehumidification Inside the sealed lower sensor chamber, a porous, breathable desiccant tray is installed to effectively absorb moisture and condensation that cannot be blocked from the outside, keeping the inside of the instrument dry.

[0043] 2. Multifunctional movable deployment stand To achieve the flexibility of "deployment and monitoring at any time", this device is designed with an integrated external movable support 14.

[0044] Triangular telescopic outrigger structure: Made of aviation aluminum, the three outriggers can independently extend and retract steplessly from 0.5 meters to 1.6 meters and are self-locking. Each outrigger has a non-slip rubber foot pad at the end, which can adapt to the uneven terrain of the tunnel floor and stabilize the detection sensor at the optimal breathing zone height.

[0045] Strong magnetic chuck structure: With a built-in neodymium iron boron permanent magnet array and a scratch-resistant rubber coating, it provides a vertical adsorption force of over 500N, allowing it to be firmly attached to hydraulic support columns, mine car bodies, steel air doors, or any iron surface for wall-mounted monitoring.

[0046] Suspension structure: Made of high-strength engineering plastic, it is equipped with a threaded connector 15, a metal hook 16 and an anchor bolt interface 17, and can be safely suspended on cables, pipes and anchor bolt trays, suitable for monitoring of roof areas.

[0047] 3. Intelligent Sensing and Early Warning Subsystem Modular sensor array of gas detection device 5: The mainboard provides four standardized smart sensor interfaces, supporting "plug and play". Each interface offers unified power supply, digital communication, and physical card slots. Users can flexibly select sensor modules based on the current risk type of the work area.

[0048] Edge intelligent computing of wireless communication and processing module 2: Equipped with an ARM Cortex-M7 core processor, it not only collects data but also runs advanced embedded AI algorithms. By performing time-series analysis on various gas concentration values ​​or identifying dangerous trends such as abnormal fluctuations, the algorithm determines that the concentration is at risk of exceeding the low alarm threshold within the next 10 minutes. Even if the current concentration is normal, the device will issue a "trend warning" in advance, buying valuable time for response.

[0049] Predictive maintenance function of wireless communication and processing module 2: The processor periodically and automatically executes a sensor self-test program, recording key parameters such as zero-point voltage and sensitivity current. By analyzing the historical degradation curves of these parameters, the device can estimate the remaining lifespan of the sensor and push a replacement reminder through the platform when 10% of the lifespan remains, realizing the transformation from "post-failure maintenance" to "predictive maintenance".

[0050] High-reliability battery module 11: It uses intrinsically safe lithium iron phosphate battery packs that have passed coal mine safety certification, with a capacity of no less than 10,000mAh. The charging method provides intrinsically safe wired fast charging, which, together with the explosion-proof charging base underground, ensures high safety and facilitates batch charging management at the charging point.

[0051] The monitoring method provided by this invention is a complete closed-loop process from equipment deployment, data sensing, intelligent analysis to collaborative response. The specific detailed steps are as follows: Step 1: Scene Adaptive Deployment and System Activation Based on the production plan or risk assessment, the inspector or safety officer determines the areas that need to be monitored more closely (such as newly exposed tunneling heads, the upper corner of the coal mining face, and temporarily set up refuge chambers).

[0052] Choose the appropriate deployment mode based on the site's physical environment: Ground-based monitoring mode: Install the triangular telescopic outrigger structure and adjust the outrigger to stabilize the equipment, so that the sensor air inlet height is about 1.5 meters (simulating human breathing height).

[0053] Equipment adhesion monitoring mode: Install a strong magnetic chuck structure to attach the equipment to the air intake side or near the heat-prone parts of the main equipment (such as coal mining machine, conveyor motor).

[0054] Top slab space monitoring mode: Using a suspension structure, the equipment is fixed to the roof anchor bolts or ventilation ducts to monitor gases such as CH4 or CO accumulated on the roof.

[0055] Press and hold the power button to start the device. The system will perform a power-on self-test and initialize all sensors. The LED indicator will flash green slowly, indicating that it has entered the preheating preparation state.

[0056] Step 2: Self-organizing network registration and environmental baseline establishment After the device is started, it automatically searches for and connects to the preset downhole IoT gateway, registers and goes online. The registration information includes: the device's unique ID, current location, sensor configuration list, battery level, etc.

[0057] After the preheating period (usually 3-5 minutes), the device enters "Environmental Baseline Learning Mode." Over the next 5 minutes, the system collects current ambient gas concentration, temperature, and humidity data, calculates and stores their average values ​​as a dynamic baseline for the local environment. This baseline value will be used for anomaly detection in subsequent trend analysis.

[0058] Step 3: Continuous Monitoring and Edge Intelligent Analysis+ The device enters a normal operating cycle, synchronously collecting data from all sensors at a frequency of once per second.

[0059] Data preprocessing: Wireless communication and processing module 2 first calls the dynamic temperature and humidity compensation algorithm to correct the original values ​​of all gas concentrations in real time.

[0060] Real-time trend analysis: The processor stores the gas concentration data collected in the last 5 minutes in chronological order.

[0061] The linear regression slope of the buffer data is calculated every 10 seconds. Taking CH4 as an example, if the slope is consistently positive and the value exceeds the set threshold, it is determined to be an "accumulation trend".

[0062] Meanwhile, a first-order difference algorithm is applied to monitor the instantaneous rate of change in concentration, which is used to detect gas leaks such as CO that are suddenly generated by incomplete combustion.

[0063] Hierarchical judgment logic: Status normal (green): All concentration values ​​are within the normal fluctuation range of the dynamic baseline and show no significant trend. Data is uploaded once according to the set period.

[0064] Trend Warning (Blue): A gas is detected to have a clear "accumulation trend" or "slow increase," but the current concentration has not reached the Level 1 alarm threshold. The device's local blue indicator light begins to flash slowly, and the "trend warning" information (including gas type, predicted concentration, and estimated time of exceeding the limit) is sent with high priority to the monitoring platform and Bluetooth terminals of nearby personnel.

[0065] Exceedance Alarm (Yellow / Red): The concentration reaches the preset Level 1 (low alarm) or Level 2 (high alarm) threshold. Immediately trigger a local Level 3 audible, visual, and vibration alarm, and continuously upload alarm data streams at high speed (once per second).

[0066] Step 4: Multi-path collaborative alarm and emergency response Local alarm: The device itself activates a pulse siren of up to 105dB, a red flashing LED, and strong vibration to attract the attention of on-site personnel.

[0067] Network broadcast: Alarm signals are uploaded to the monitoring center's large screen and dispatch console, automatically triggering voice broadcasts. Simultaneously, a simplified alarm message is broadcast to the smart mining lamps of nearby workers, which vibrate and flash their lights as a notification.

[0068] Linkage control: The monitoring platform software can preset linkage strategies. For example, when the equipment on the windward side of the coal mining machine detects that CH4 reaches 1.0%, the platform can automatically send a command to the intelligent power supply switch in that area to cut off the power supply to the coal mining machine and activate the enhanced local ventilation fan.

[0069] Step 5: Data Traceability and System Maintenance All raw data, corrected data, and alarm events are timestamped with high precision and stored in the device's local memory, capable of storing over 90 days of minute-level data to ensure traceability and analysis after an incident.

[0070] The monitoring platform software receives equipment self-test data in real time and displays the health status of each sensor in a graphical interface. When the platform receives a warning that "the sensor's lifespan is about to end," it automatically generates a spare parts purchase request in the materials management system and arranges a maintenance work order.

[0071] The method of the present invention will be further described below by deploying three devices of the present invention in different areas.

[0072] Step 1, Planning and Preparation: Based on the coal mining operation plan, determine the locations of the equipment for monitoring gas emission and distribution. Check the battery levels, sensor expiration dates, and self-test status of the three devices to ensure they are in good working order. Based on the deployment site environment, prepare appropriate external movable supports: 14: At 20 meters, where there are anchor bolts on the roof, prepare a suspension structure; at 50 meters, where there are hydraulic support columns, prepare a strong magnetic chuck structure; at 100 meters, where the floor is flat, prepare a triangular telescopic outrigger structure.

[0073] Step 2: The operator carries the device to the designated location, selects a suitable support structure based on the actual site conditions, ensures the device structure is stable, and then installs and secures the device. Press and hold the power button on each device for 3 seconds to start it. The equipment completes self-tests sequentially, and then the module automatically searches for and connects to the pre-deployed intrinsically safe wireless gateway in the tunnel, registering and going online.

[0074] Step 3: The three devices begin continuous monitoring. Data is packaged every minute and uploaded to the underground ring network via wireless communication and processing module 2, ultimately converging to the surface mine safety monitoring center server. Assuming the device at 50 meters detects a slow increase in methane concentration from 0.2%, the intelligent algorithm calculates the rate of increase as 0.05% / minute. After 10 minutes, the concentration rises to 0.7%, and the trend prediction module determines that, following this trend, it will exceed the first-level alarm threshold of 0.8% in 8 minutes. A "blue trend warning" is immediately triggered: the device's blue light ring begins flashing, and the screen displays "Methane Accumulation Trend Warning." This warning information is simultaneously uploaded to the monitoring center via the network. Monitoring center and on-site response: A warning information box pops up on the monitoring screen, and the dispatcher notifies the gas inspector and team leader in the area via walkie-talkie. Upon receiving the alert, on-site personnel immediately check the device screen and take appropriate measures. Through early warning and intervention, gas over-limit alarms and production interruptions may be avoided.

[0075] Step 4: The device automatically performs a sensor self-test once daily during the early morning off-peak period, uploading data such as zero point and sensitivity. The platform software analyzes the self-test data; if it detects a decrease in sensor sensitivity, it automatically generates a "maintenance work order" and pushes it to the electromechanical team's maintenance personnel via the network. The maintenance personnel receive the new sensor module, disconnect the power upon arrival, open the bottom dust screen 8 at the bottom of the sensor compartment, remove the old sensor module, insert the new module, and after a "click," the device automatically recognizes the new sensor and completes preliminary calibration. The entire process takes no more than 2 minutes.

Claims

1. A portable moisture-proof gas detection device, characterized in that: The explosion-proof and moisture-proof housing (1) has holes all over its body. The interior of the explosion-proof and moisture-proof housing (1) is divided into an upper electrical compartment and a lower sensor compartment by a physical barrier plate (3). The upper electrical compartment is equipped with a wireless communication and processing module (2), a battery module (11) and a motor (12). The output shaft of the motor (12) extends into the lower sensor compartment and is connected to a fan (6). The lower sensor compartment is also equipped with a gas detection device (5) and a porous breathable desiccant tray (9). The surface of the explosion-proof and moisture-proof housing (1) is equipped with a display alarm device (13). The bottom of the explosion-proof and moisture-proof housing (1) is connected to an external movable bracket (14) via a bracket fixing interface (7).

2. The portable moisture-proof gas detection device according to claim 1, characterized in that: The explosion-proof and moisture-proof outer shell (1) of the lower sensor compartment is fixed with a side dustproof mesh (4) and a bottom dustproof mesh (8) is fixed at the bottom. The fan (6), gas detection device (5) and porous breathable desiccant disc (9) are arranged in the cavity surrounded by the side dustproof mesh (4) and the bottom dustproof mesh (8).

3. The portable moisture-proof gas detection device according to claim 2, characterized in that: The motor (12) extends into the output shaft of the lower sensor compartment and is fitted with a protective tube (10). A porous air-permeable desiccant disc (9) and a gas detection device (5) are sequentially fitted on the protective tube (10) from bottom to top. The side dustproof mesh (4) and the bottom dustproof mesh (8) are made of hydrophobic filter mesh, and a nano hydrophobic breathable membrane is installed on the inner side of the filter mesh.

4. The portable moisture-proof gas detection device according to claim 1, characterized in that: The external movable bracket (14) is a triangular telescopic support leg structure, a strong magnetic chuck structure, or a suspension structure. When it is a suspension structure, the external movable bracket (14) includes a threaded connector (15), and the other end of the threaded connector (15) is connected to a metal hook (16). The metal hook (16) is provided with an anchor rod interface (17). When it is a strong magnetic chuck structure, the external movable bracket (14) includes a threaded connecting rod (19), the bottom of the threaded connecting rod (19) is connected to a mounting base, and a movable connecting rod (18) is hinged to the mounting base. The other end of the movable connecting rod (18) is hinged to a high magnetic base (20).

5. A portable moisture-proof gas detection device according to claim 1, characterized in that: The porous and breathable desiccant tray (9) includes a porous and detachable tray, in which a highly absorbent desiccant is placed and the surface is covered with a breathable mesh.

6. A portable moisture-proof gas detection device according to claim 1, characterized in that: The gas detection device (5) includes a modular sensor array consisting of multiple independent smart sensor slots, the array including at least a catalytic combustion sensor and an electrochemical sensor.

7. The portable moisture-proof gas detection device according to claim 1, characterized in that: The display alarm device (13) includes an ultra-bright LED multi-color indicator light, a high-decibel buzzer, and a vibration motor; The wireless communication and processing module (2) includes: an intelligent early warning algorithm unit and an equipment self-test and life prediction unit. The intelligent early warning algorithm unit can analyze gas concentration data based on time series, and can predict the concentration development in a specific time period in the future based on its changing trend before the gas concentration reaches the preset alarm threshold, and issue a trend warning signal. The equipment self-test and life prediction unit is used to periodically and automatically perform sensor baseline calibration and performance diagnosis, predict its remaining service life by analyzing the sensor signal attenuation characteristics, and generate maintenance prompt information.

8. A method of using the portable moisture-proof gas detection device as described in any one of claims 1-7, characterized in that: Specifically, it includes the following steps: S1: Flexible deployment: Select the appropriate deployment mode according to the terrain and structure of the area to be monitored: ground area monitoring mode, equipment attachment monitoring mode or ceiling space monitoring mode, and ensure that the power is on; S2: Self-test and networking: After the device starts up, it automatically performs sensor and system self-tests, and automatically connects to the mine safety monitoring network via Wi-Fi, reporting its device ID, location status and self-test results; S3: Continuous monitoring and intelligent analysis: The device continuously samples the ambient gas; the wireless communication and processing module processes the data in real time and runs an intelligent early warning algorithm to predict the trend of slowly changing gas risks; S4: Tiered alarm and information synchronization: When the gas concentration is detected to reach the preset threshold or a significant dangerous trend is identified, the device immediately activates the corresponding level of local audible, visual and vibration alarm; at the same time, the alarm event, real-time data and location information are synchronously uploaded to the monitoring center through the wireless communication and processing module and broadcast to the relevant mobile inspection terminals in the system. S5: Data Management and Maintenance: Monitoring data is continuously stored locally on the device and uploaded to the cloud; the monitoring platform arranges planned maintenance based on the received device self-inspection and life prediction information, and replaces sensor modules with degraded performance in advance.

9. The method of using a portable moisture-proof gas detection device according to claim 8, characterized in that: In S3, the intelligent early warning algorithm specifically works as follows: using historical concentration data sequences, through exponential smoothing or ARIMA time series models, it predicts the trajectory of changes in the concentration of a specific gas within a certain future time period. When the predicted concentration is likely to exceed the low-level alarm threshold, a trend warning is triggered.

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