Intelligent monitoring and purifying system and method for air in mine

Abstract

The application discloses a kind of mine downhole air intelligent monitoring and purification system and method, the system includes: detection device, air purification device and wireless communication device, detection device includes: main control module and multiple gas detection sensors, wherein, main control module is used to control the working state of multiple related devices in system, and the data collected by sensor is operated, whether air purification or early warning is judged;Multiple gas detection sensors are used to monitor multiple types of gas in downhole target area in synchronous timing according to the common clock signal output by main control module;Air purification device is used to be linked with ventilation system, to exclude harmful gas;Wireless communication device is used to transmit the data information output by detection device to ground control center.The system integrates downhole air automatic monitoring, purification and early warning linkage as a whole, improves the accuracy, comprehensiveness and intelligence of downhole air monitoring.

Description

Technical Field

[0001] This application relates to the field of coal mining safety technology, and in particular to an intelligent monitoring and purification system and method for underground air. Background Technology

[0002] Currently, to ensure safe production in mines, it is necessary to monitor underground air quality. Relevant regulations specify the content of various gases and dust concentrations in the air of underground working areas. The main gas components monitored underground include oxygen (O2), carbon dioxide (CO2), methane (CH4), hydrogen (H2), sulfur dioxide (SO2), carbon monoxide (CO), hydrogen sulfide (H2S), ammonia (NH3), and nitrogen oxides (NO). Dust monitoring mainly involves parameters such as total dust, respirable dust, and the content of free SiO2 in the dust. Therefore, real-time and comprehensive understanding of the underground air conditions is crucial in mine safety monitoring systems.

[0003] In related technologies, downhole air monitoring typically involves configuring various detection devices such as methane detectors, carbon monoxide detectors, and coal mine dust concentration meters. Each detection device can detect one or two gases, and the simultaneous use of multiple devices meets the basic requirements for downhole gas detection.

[0004] However, in practical applications, the aforementioned gas monitoring solutions have relatively limited functionality, cumbersome operating procedures for multiple individual devices, and high costs in terms of manpower and hardware. Furthermore, controlling multiple devices simultaneously results in significant workload for staff. Moreover, during comprehensive data analysis, the difficulty in synchronizing the timing of different devices and the poor correlation between various data sets can lead to discrepancies between the detection results and the actual situation. Summary of the Invention

[0005] The purpose of this application is to at least partially solve one of the aforementioned technical problems.

[0006] Therefore, the first objective of this application is to propose an intelligent monitoring and purification system for underground air. This system integrates automatic monitoring, purification, and early warning linkage of underground air, solving the problems of single testing of underground air indicators and poor correlation between various data. By using a simultaneous clock master control to ensure the timing synchronization of various indicator sensors, the accuracy, comprehensiveness, and intelligence of underground air quality monitoring are improved.

[0007] The second objective of this application is to propose an intelligent monitoring and purification method for underground air.

[0008] The third objective of this application is to provide a computer-readable storage medium.

[0009] To achieve the above objectives, a first aspect of this application proposes an intelligent monitoring and purification system for underground air. This system includes: a detection device, an air purification device, and a wireless communication device. The detection device includes: a main control module and multiple types of gas detection sensors.

[0010] The detection device establishes a communication connection with the air purification device through the wireless communication device;

[0011] The main control module is used to control the working status of multiple related devices in the intelligent monitoring and purification system for underground air, monitor the working parameters of the multiple related devices, and perform calculations on the data collected by the multiple gas detection sensors to determine whether to perform air purification or early warning processing.

[0012] The multi-type gas detection sensors are used to monitor the indicators of various types of gases and dust in the target area downhole in a synchronized time sequence according to the common clock signal output by the main control module.

[0013] The air purification device is connected to the ventilation system in the mine. The air purification device is used to adjust the air volume in the mine in conjunction with the ventilation system so as to remove harmful gases through ventilation.

[0014] The wireless communication device is used to transmit the data information output by the detection device to the ground control center via wireless communication.

[0015] In addition, the intelligent monitoring and purification system for underground air in this application also has the following additional technical features:

[0016] Optionally, in some embodiments, the detection device further includes a gas detection data processing circuit, which includes: an amplifier for amplifying the electromotive force signal input from the multi-type gas detection sensor; a low-pass filter circuit for filtering the amplified signal; and an analog-to-digital converter for converting the filtered analog signal output from the low-pass filter circuit into a digital signal and transmitting the digital signal to the main control module.

[0017] Optionally, in some embodiments, the detection device further includes: a motor and a gas inlet / outlet device, wherein the gas inlet / outlet device includes an air duct, and the multi-type gas detection sensors are arranged in the air duct; the motor is used to introduce air from the target area into the air duct.

[0018] Optionally, in some embodiments, the detection device further includes a power supply module, which includes a system power supply unit and a motor power supply unit. The system power supply unit includes a system battery pack, a system overcurrent protection board, a system power interface, a system power monitoring circuit, a microcontroller interface circuit, and a sensor power supply circuit. The motor power supply unit includes a motor battery pack, a motor overcurrent protection board, a motor power interface, a boost circuit, a motor power monitoring circuit, a motor control circuit, and a power isolation circuit.

[0019] Optionally, in some embodiments, the wireless communication device is a WIFI communication module, which is used to realize data interaction between the detection device, the ground control center and the air purification device; the various devices in the mine air intelligent monitoring and purification system communicate based on the RS485 communication bus.

[0020] Optionally, in some embodiments, the detection device further includes a storage module for storing data collected by the multi-type gas detection sensors according to time information.

[0021] Optionally, in some embodiments, the detection device further includes a dust removal module, which removes dust from the air in the target area after receiving a dust removal command from the main control module.

[0022] To achieve the above objectives, a second aspect of the present invention provides a method for intelligent monitoring and purification of underground air, which is applied to the intelligent monitoring and purification system for underground air proposed in the first aspect above. The method includes:

[0023] At preset time intervals, multiple gas detection sensors are controlled to periodically detect the air in the target area downhole;

[0024] The air detection data collected by the multi-type gas detection sensors is compared with different abnormal thresholds, and the corresponding purification strategy is executed according to the comparison results. The different abnormal thresholds include ordinary abnormal thresholds and alarm abnormal thresholds. When the air detection data is greater than the ordinary abnormal threshold, the air purification device is controlled to turn on and switch to real-time detection mode.

[0025] If the real-time air quality monitoring data changes to a level greater than the alarm anomaly threshold, an early warning message is sent to the ground control center via a wireless communication device, and disaster prevention and control measures are implemented.

[0026] In addition, the intelligent monitoring and purification method for underground air in this application also has the following additional technical features:

[0027] Optionally, in some embodiments, after the air purification device is turned on and switched to real-time monitoring mode, the method further includes:

[0028] Acquire real-time air detection data continuously collected by the various gas detection sensors;

[0029] Once the real-time air quality monitoring data returns to a safe range, the air purification device is controlled to shut down and switch back to a state of periodic air quality monitoring within the target area.

[0030] To achieve the above objectives, a third aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the intelligent monitoring and purification method for underground air as described in any of the second aspects above.

[0031] The technical solutions provided by the embodiments of this application have at least the following beneficial effects:

[0032] This application integrates sensors for multiple gases to detect downhole gases, avoiding inaccurate results caused by detecting a single gas. A simultaneous clock master control ensures time synchronization of all sensor parameters, solving the problems of single-factor testing and poor correlation between various data. This application introduces a wireless communication module, employing both on-chip and off-chip communication methods to transmit air quality data. It can periodically package and send downhole air data to the ground control center, facilitating comparative analysis of air data from different downhole areas. This allows for the development of more targeted downhole air detection and purification plans, thereby improving downhole air quality. Furthermore, access to the downhole local area network enhances the device's scalability and enriches its sensing layer. Moreover, this application periodically detects harmful gases downhole, establishing two detection thresholds. Based on real-time detection results, corresponding strategies are implemented, and alarms are triggered appropriately based on indicator changes, reducing false alarms caused by normal mining operations and further improving detection accuracy. Once an air quality index cannot be reduced, this application triggers an alarm and simultaneously transmits a signal to the ground control center, providing timely early warning of abnormal air quality. Therefore, this application integrates the monitoring, purification, early warning and local communication of underground air, which reduces the cost of underground air treatment, greatly reduces resource waste, is conducive to the intelligent and unmanned construction of coal mines, and improves the accuracy, comprehensiveness and intelligence of underground air quality monitoring.

[0033] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0034] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0035] Figure 1 This is a schematic diagram of the structure of an intelligent monitoring and purification system for underground air proposed in an embodiment of this application;

[0036] Figure 2 This is a schematic diagram of the structure of a specific intelligent monitoring and purification system for underground air in a mine, as proposed in an embodiment of this application.

[0037] Figure 3 This is a schematic diagram illustrating the working principle of a power supply module according to an embodiment of this application;

[0038] Figure 4 This is a schematic diagram of the structure of a power supply module proposed in an embodiment of this application;

[0039] Figure 5 This is a schematic diagram illustrating the working principle of a detection board proposed in an embodiment of this application;

[0040] Figure 6 This is a flowchart of an intelligent monitoring and purification method for underground air proposed in an embodiment of this application;

[0041] Figure 7 This is a schematic diagram illustrating the principle of an intelligent monitoring and purification method for underground air proposed in an embodiment of this application. Detailed Implementation

[0042] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0043] It should be noted that the underground air monitoring schemes in the relevant embodiments suffer from problems such as limited testing methods for underground air indicators and poor correlation between various data. Furthermore, the clock control cannot guarantee the synchronization of the timing of various indicator sensors, which is detrimental to the construction of intelligent and unmanned coal mines. Additionally, the underground air purification devices in the relevant embodiments only purify underground air but cannot collect, process, and transmit the purification data to the ground control center for comparative analysis of disaster data. Moreover, some devices in the underground air purification early warning devices in the relevant embodiments lack network connectivity, resulting in an insufficient sensing layer and preventing the long-term recording, comparison, and analysis of a large amount of air indicator data. Furthermore, the existing early warning devices do not set different air warning signals based on real-time underground air phenomena.

[0044] Therefore, this application proposes an intelligent monitoring and purification system and method for underground air. This system integrates automatic monitoring, purification, and early warning linkage of underground air, and can be specifically used for monitoring and purifying underground air. It utilizes existing mine gas monitoring sensors for gas detection, supplemented by communication equipment to connect with mine air purification devices, achieving intelligent interconnection of underground equipment. Throughout the process, the detection device automatically reads the parameters of various sensors inside the device, and automatically activates the air purification function when parameters exceed the limits, improving the accuracy, comprehensiveness, and intelligence of underground air monitoring.

[0045] The following description, with reference to the accompanying drawings, describes an embodiment of an intelligent monitoring and purification system and method for underground air in mines.

[0046] Figure 1 This is a schematic diagram of the structure of an intelligent monitoring and purification system for underground air proposed in an embodiment of this application, as shown below. Figure 1 As shown, the system includes: a detection device 100, an air purification device 200, and a wireless communication device 300. The detection device 100 includes: a main control module 10 and a multi-gas detection sensor 20.

[0047] The detection device 100 establishes a communication connection with the air purification device 300 through the wireless communication device 200, and the established wireless connection is represented by a dashed line in the figure.

[0048] The main control module 10 is used to control the working status of multiple related devices in the intelligent monitoring and purification system for underground air, monitor the working parameters of multiple related devices, and perform calculations on the data collected by multiple gas detection sensors to determine whether to perform air purification or early warning processing.

[0049] Specifically, the main control module 10 can be a microcontroller with a control circuit. The microcontroller sends corresponding control commands to various devices in the system through the control circuit. The microcontroller and its control circuit can be regarded as the microprocessor central unit in the detection device 100, which has the functions of controlling and monitoring various components in the system and performing data processing.

[0050] For example, the main control module 10 can control the motor switch, detect the motor's operating current and voltage, control multiple independent gas sensors, control multiple independent gas acquisition circuits, and simultaneously store the received data synchronously, as well as control the wireless communication device 300 to transmit data and monitor the voltage status of the power supply module, among other functions.

[0051] The multi-gas detection sensor 20 is used to monitor the indicators of various types of gases and dust in the target area of ​​the well in a synchronized time sequence according to the common clock signal output by the main control module 10.

[0052] Specifically, the target area is the area underground where air monitoring is to be conducted, which is also the working area of ​​the intelligent air monitoring and purification system of this application. The multi-gas detection sensor 20 can be a combination of multiple independent gas sensors, each sensor corresponding to the detection of an index of a gas in the air, and all gas sensors are arranged in the same position and connected to the main control module 10, and synchronously perform data acquisition according to the instructions sent by the main control module 10.

[0053] Therefore, this application deploys multiple gas monitoring sensors in the air monitoring and purification system, enabling the monitoring of various harmful gases such as carbon dioxide, methane, and sulfur dioxide, as well as dust indicators (e.g., gas content), thus enriching the monitoring indicators for downhole air. Furthermore, a simultaneous clock control module ensures the time synchronization of the indicators collected by each sensor, guaranteeing the correlation between the collected data.

[0054] Furthermore, the main control module 10 can perform relevant logical operations on the gas monitoring data collected by the various gas detection sensors 20 to determine whether the content of harmful gases in the air exceeds the standard. If it does, it controls the air purification device 200 to perform air purification operations on the target area. It can also determine whether a mine disaster has occurred based on the collected data, and then issue an early warning through the wireless communication device 300. Specific implementation methods will be described in subsequent embodiments.

[0055] The air purification device 200 is connected to the ventilation system in the mine. The air purification device 200 is used to adjust the air volume in the mine in conjunction with the ventilation system so as to remove harmful gases through ventilation.

[0056] Specifically, the main functions of the air purification device 200 include dust removal and linkage with the existing ventilation system in the mine to regulate the underground air volume and achieve a purification effect. When a controllable anomaly is determined based on the collected air data, this device is activated and linked with the ventilation system to remove harmful gases through ventilation, which can quickly restore the small-scale abnormal changes in gas content caused by normal mining.

[0057] For example, the air purification device 200 can be an intrinsically safe air purification device for mining equipped with communication control functions.

[0058] The wireless communication device 300 is used to transmit the data information output by the detection device 100 to the ground control center via wireless communication.

[0059] Specifically, the wireless communication device 300 can employ various wireless communication technologies such as WIFI, Bluetooth, and 5G, and utilizes a ring network device to achieve data communication between the underground and surface areas. The wireless communication device 300 can transmit data output from the detection device 100, including processed air monitoring data and early warning commands, to external devices such as the ground control center, thus enabling the transmission of air quality data to external systems. Furthermore, as mentioned above, the wireless communication device 300 also establishes a communication connection between the detection device 100 and the air purification device 200; commands sent by the detection device 100 can be transmitted to the air purification device 200 via the wireless communication device 300.

[0060] Furthermore, since the intelligent air monitoring and purification system of this application can be networked via the wireless communication device 300, meaning the wireless communication device 300 can access the underground local area network, it can utilize network resources to provide intelligent data support for the intelligent air monitoring and purification system in the mine, enriching the perception layer of various devices within the system and improving the scalability of the devices. For example, by combining online cases and judgment logic, the calculation results of the main control module 10 can be corrected, further improving the accuracy of determining whether to perform air purification or early warning processing.

[0061] To more clearly describe the various functions achievable by the intelligent monitoring and purification system for underground air in this application, a detailed description is provided below using a specific embodiment in a practical application.

[0062] Figure 2 This is a schematic diagram of the structure of a specific intelligent monitoring and purification system for underground air in a mine, as proposed in an embodiment of this application. Figure 2 As shown, in Figure 1 Based on the above, the system includes: generator 1, WIFI communication module 2, gas inlet and outlet device 3, various sensors 4, dust removal device 5, air purification device 7, and data center 8.

[0063] It should be noted that, in Figure 2 In the example, generator 1, WIFI communication module 2, gas inlet / outlet device 3, various gas sensors 4, and dust removal device 5 are components of the detection device 100 in the above embodiment. Air purification device 7 is the air purification device 200 in the above embodiment, various gas sensors 4 are the multi-type gas detection sensors 20 in the above embodiment, and data center 8 can be the data collection and control system in the ground control center. This system can monitor the gas 6 to be monitored in the target area. The system will be described in detail below.

[0064] In one embodiment of this application, the detection device further includes a gas detection data processing circuit, which includes: an amplifier for amplifying the electromotive force signal input from multiple gas detection sensors; a low-pass filter circuit for filtering the amplified signal; and an analog-to-digital converter for converting the filtered analog signal output from the low-pass filter circuit into a digital signal and transmitting the digital signal to the main control module.

[0065] Specifically, in this embodiment, the gas detection data processing circuit, under the control of the microcontroller, performs a series of data processing steps on the electromotive force signals input from the various connected gas sensors 4 to convert them into data that can be calculated and displayed. For example, the signals are first amplified by a low-noise, programmable-gain, high-amplification, and wide-bandwidth instrumentation amplifier, then filtered by a high-performance analog low-pass filter circuit, then converted into digital signals by a high-resolution, high-speed, and low-noise analog-to-digital converter, and finally transmitted to the data center via Wi-Fi communication under the control of the microcontroller.

[0066] In one embodiment of this application, such as Figure 2 As shown, the detection device also includes: a motor 1 and a gas inlet / outlet device 3. The gas inlet / outlet device 3 includes an air duct, in which various gas detection sensors 4 are arranged; the motor 1 is used to introduce air from the target area into the air duct.

[0067] Specifically, in this embodiment, during air monitoring, the motor 1 (which can be simply referred to as the motor in subsequent embodiments of this application) is first turned on. The motor 1 performs work to ventilate, causing air in the target area to quickly flow into the air duct of the gas inlet / outlet device 3. Then, various gas sensors 4, which are pre-placed in the air duct, are responsible for reading the corresponding air quality indicators.

[0068] In one embodiment of this application, the detection device further includes: a power supply module ( Figure 2 (Not shown in the image), the power supply module includes: a system power supply unit and a motor power supply unit. The system power supply unit includes: a system battery pack, a system overcurrent protection board, a system power interface, a system power monitoring circuit, a microcontroller interface circuit, and a sensor power supply circuit; the motor power supply unit includes: a motor battery pack, a motor overcurrent protection board, a motor power interface, a boost circuit, a motor power monitoring circuit, a motor control circuit, and a power isolation circuit.

[0069] Specifically, combined Figure 3 and Figure 4 This power supply module is described in detail. Figure 3 This is a schematic diagram illustrating the working principle of a power supply module proposed in an embodiment of this application, as shown below. Figure 3As shown, the system is pre-configured with a battery pack to power the system. The battery pack includes various types of batteries such as lithium iron phosphate batteries, as well as an overcurrent protection circuit. The electrical energy output by the battery pack is processed by a power conversion device, an isolation device, and a monitoring device. Under the control of the power switch, when power is required, the processed electrical energy is transmitted to the boards of various modules in the system to power the various components in the system.

[0070] As mentioned above, since this system includes an electric motor and other electrical equipment, the power supply module is divided into two parts due to the different power supply characteristics: a system power supply section and a motor power supply section, namely, a system power supply unit and a motor power supply unit. Furthermore, Figure 3 The power supply module shown also performs this workflow in two parts.

[0071] Therefore, as Figure 4 As shown, in practical applications, the system power supply section includes: a system battery pack (represented by the system power supply in the figure), a system overcurrent protection board, a system power interface, a system power monitoring circuit, a microcontroller interface circuit, and a sensor power supply circuit (represented by various sensors in the figure). The system power interface includes a charging interface and a power supply interface, and the microcontroller interface circuit is connected to the power supply circuit of the microcontroller's core board.

[0072] The motor power supply section includes: a motor battery pack (represented as motor power supply in the diagram), a motor overcurrent protection board, a motor power interface, a boost circuit, a motor power supply monitoring circuit, a motor control circuit, and a power isolation circuit. The motor power interface includes a charging interface and a power supply interface. The motor control circuit is used to draw air into the gas inlet / outlet device 3.

[0073] In practical applications, the application system power supply unit supplies power to the relevant equipment in the system for the process of detecting harmful gases, such as... Figure 5 As shown, the system power circuit supplies power to the various components in the probe board, enabling the device to power on and perform corresponding functions.

[0074] In one embodiment of this application, as described above, the wireless communication device is a WIFI communication module 2, which is used to realize data interaction between the detection device, the ground control center and the air purification device; the various devices in the mine air intelligent monitoring and purification system communicate based on the RS485 communication bus.

[0075] Specifically, the WIFI communication module 2, based on WIFI technology, enables data transmission between the air purifier 7 and the detection device 10, as well as the transmission of air purification commands from the detection device 10 to the air purifier 7. Furthermore, under the control of the microcontroller, the WIFI communication module 2 facilitates data and command transmission between the data center 8, the air purifier 7, and the detection device 10.

[0076] Furthermore, within the intelligent air monitoring and purification system in this mine, data exchange between various components such as gas sensors, main control modules, and storage chips relies on an RS485 communication bus. This communication method utilizes the voltage difference between components, resulting in more stable communication. Therefore, this embodiment combines on-chip RS485 communication with off-chip WIFI communication to achieve the transmission of air quality data.

[0077] In one embodiment of this application, the detection device further includes a storage module, which is used to store data collected by multiple types of gas detection sensors according to time information.

[0078] Specifically, in this embodiment, the storage module can be various types of storage chips such as synchronous dynamic random-access memory (SDRAM). The various air quality data collected by the gas sensors 4 can be stored sequentially in the storage module according to the collection time order. Furthermore, when the ground data center needs to read the monitored air quality data, the data stored in the storage module can be packaged and transmitted to the ground control center via the WIFI communication module 2.

[0079] In one embodiment of this application, such as Figure 2 As shown, the detection device also includes a dust removal module 5, which removes dust from the air in the target area after receiving a dust removal command from the main control module.

[0080] Specifically, dust removal module 5 can be configured as follows: Figure 2 As shown, the air duct of the gas inlet / outlet device 3 is installed to remove dust from the incoming and outgoing gas. When the air purification device 7 receives an air purification command to ventilate and exhaust the gas, it can simultaneously control the dust removal module 5 to work and remove dust.

[0081] In one embodiment of this application, the intelligent monitoring and purification system for underground air also includes a transmitting module, which can be used to transmit signals that need to be transmitted in the system, such as wireless communication signals.

[0082] Specifically, in this embodiment, under the control of the microcontroller's control circuit, electromagnetic waves are emitted through the transmitting coil. This circuit consists of a shutdown circuit, a transmitting circuit, a rectifier bridge, and a control circuit. The main control signal is used to switch the inverter bridge arm on and off, converting the DC power supply into the required waveform and transmitting it through the transmitting coil. The microcontroller's internal analog-to-digital converter is used to monitor the transmitting current and voltage.

[0083] In practical applications, to achieve the aforementioned functions, the intelligent monitoring and purification system for underground air requires various interfaces and circuits to be installed on the system boards. For example, to ensure the normal operation of the main control module 10, the design of the main control module, i.e., the microcontroller board, includes, but is not limited to: JTAG communication interface, EPCS storage circuit, system clock circuit, power-on reset circuit, FLASH storage circuit, SDRAM storage circuit, and I / O port control interface, etc.

[0084] In summary, the intelligent underground air monitoring and purification system implemented in this application integrates sensors for multiple gases to detect underground gases, avoiding inaccurate results caused by detecting a single gas. Simultaneous clock control ensures the timing synchronization of various indicator sensors, solving the problems of single-indicator testing and poor correlation between different types of data. The system introduces a wireless communication module, employing both on-chip and off-chip communication methods to transmit air indicator data. It can periodically package and send underground air data to the ground control center, facilitating comparative analysis of air data from different underground areas, enabling the development of more targeted underground air detection and purification plans, thereby improving underground air quality. Furthermore, access to the underground local area network enhances the equipment's scalability and enriches the equipment's sensing layer. Thus, this system integrates underground air monitoring, purification, early warning, and local communication, reducing the cost of underground air management, significantly minimizing resource waste, promoting the intelligent and unmanned construction of coal mines, and improving the accuracy, comprehensiveness, and intelligence of underground air quality monitoring.

[0085] To more clearly illustrate the specific implementation process of monitoring and purifying underground air through the intelligent monitoring and purification system for underground air, a detailed description of an intelligent monitoring and purification method for underground air proposed in this application embodiment is provided below. This method is applied to the intelligent monitoring and purification system for underground air in the above embodiment; that is, the system targeted by this method is the intelligent monitoring and purification system for underground air described in the above embodiments. The devices included in the system and the connection methods of each device are as described in the above embodiments, and will not be repeated here. The executing entity of this method can be the main control module of the above-mentioned intelligent monitoring and purification system for underground air. The following describes the process in conjunction with... Figure 6 and Figure 7 The method will be explained in detail.

[0086] Figure 6 This is a flowchart of a method for intelligent monitoring and purification of underground air proposed in an embodiment of this application, as shown below. Figure 6 As shown, the method includes the following steps:

[0087] Step S601: Control multiple gas detection sensors to perform timed detection of air in the target area downhole at preset time intervals.

[0088] Specifically, the intelligent mine air monitoring and purification system described in the above embodiment is set up in the target area to be monitored, and the main control module is set to standby mode. When the mine air quality indicators are normal, in order to save computing and power resources and extend the system's operating time, the system can perform timed standby detection according to a pre-defined detection time interval.

[0089] In practice, once the timer is reached, the motor is first turned on to allow air to rush into the air duct. Various sensors are placed in the air duct to read air parameters and store them in memory chips such as SDRAM.

[0090] Step S602: Compare the air detection data collected by multiple gas detection sensors with different abnormal thresholds, and execute the corresponding purification strategy according to the comparison results. The different abnormal thresholds include ordinary abnormal thresholds and alarm abnormal thresholds. When the air detection data is greater than the ordinary abnormal threshold, control the air purification device to turn on and switch to real-time detection mode.

[0091] Specifically, during the entire air monitoring process, the detection device automatically reads data collected by various sensors within the system and compares the real-time monitoring data with two preset threshold points: ordinary abnormal thresholds and alarm abnormal thresholds. If the comparison results indicate that harmful gases exceed the standard in the target area, the air purification function is automatically activated. Based on the pre-set air pollution level, the air purification device is turned on to purify the air in the target area. Furthermore, the system enters real-time monitoring mode, continuously monitoring the air in the target area.

[0092] Specifically, when ordinary abnormal data is detected, i.e., the air quality detection data exceeds the ordinary abnormal threshold, the air purifier is activated. At this time, the main control chip changes from standby mode to real-time operation mode, monitoring the sensor values ​​in real time. If, due to sudden disasters or other reasons, the current air quality detection data exceeds the alarm abnormal threshold, an early warning can be issued directly.

[0093] It should be noted that when ordinary abnormal data occurs, it may be due to normal mining operations underground or a mine disaster. In order to avoid false alarms caused by normal mining operations underground, in one embodiment of this application, after controlling the air purification device to turn on and switch to real-time detection mode, the method further includes: acquiring real-time air detection data continuously collected by multiple gas detection sensors; and when the real-time air detection data recovers to a safe range, controlling the air purification device to turn off and switching back to the state of periodically detecting the air in the target area.

[0094] Specifically, in this embodiment, after the air purification device is turned on, it is linked with the underground ventilation system to ventilate and remove harmful gases. The small amount of harmful gases added due to normal mining operations will be removed. During this process, the main control module changes from standby mode to real-time working mode, monitoring the changes in sensor values ​​in real time. If the data collected in real time returns to normal after a certain period of time, for example, if the harmful gas content drops below a preset safety threshold (where the safety threshold is less than the normal abnormal threshold), it is determined that the harmful gases caused by normal mining operations have been removed. Then, the main control module re-enters the standby timed detection state in step S601 and maintains this state, thereby completing one detection operation.

[0095] Therefore, this embodiment of the application solves the problem of false alarms caused by reasonable abnormalities in air quality due to normal mining in certain tunneling faces. This embodiment reduces false alarms and improves the accuracy of early warning by first turning on the purification device and then reasonably alarming according to the changes in the indicators.

[0096] Step S603: When the real-time air detection data changes to a level greater than the alarm anomaly threshold, send an early warning message to the ground control center via a wireless communication device and implement disaster prevention and control measures.

[0097] Specifically, if, after a certain period of time, the real-time air monitoring data continues to change, and the hazardous gas index continues to rise, from the normal abnormal threshold to the alarm abnormal threshold, it indicates that an underground disaster such as a gas leak has occurred. The main control module then enters an interrupt state, generates an alarm command, and controls the system's wireless communication device to transmit the warning information to the ground control system via the connected local area network, broadcasting the disaster and implementing relevant disaster prevention measures.

[0098] For example, the disaster prevention measures implemented include, but are not limited to: sending alarm messages to the mobile terminals of workers currently underground to remind them to evacuate in time; displaying early warning information on the screens of the ground control center to remind relevant personnel to confirm the actual underground environment and the cause of the disaster; increasing the ventilation intensity of the underground ventilation system and combining it with other emission methods to accelerate the emission of harmful gases underground; and, if it is determined, based on further real-time monitoring results, that it is impossible to emit harmful gases, stopping the mining of the working face with severe harmful gases by controlling the operation of relevant mining equipment and sending a stop operation notification message.

[0099] Furthermore, after disaster prevention and mitigation measures are implemented to eliminate the disaster, based on continuously collected real-time monitoring data, if it is determined that the content of harmful gases remains below a preset safety threshold for a relatively long period, the disaster is considered eliminated, and this round of detection work ends. Then, a detection completion signal is sent to the ground control center via wireless communication, the system enters standby mode, a timer is started, and it awaits the next activation command.

[0100] Therefore, this method can not only provide real-time air quality data, but also has purification functions for normal leaks and early warning functions for abnormal leaks. The implementation principle can be understood through... Figure 7 To present the information in a more intuitive and clear way.

[0101] In summary, the intelligent monitoring and purification method for underground air implemented in this application detects harmful gases underground at regular intervals, establishes two detection thresholds, executes corresponding strategies based on real-time detection results, and issues reasonable alarms based on changes in indicators, reducing false alarms caused by normal mining activities and further improving detection accuracy. Once the method detects that air quality indicators cannot be reduced, it simultaneously sends an alarm signal to the ground control center, enabling timely early warning of air quality anomalies. Therefore, this method integrates underground air monitoring, purification, early warning, and local communication, reducing the cost of underground air management, significantly reducing resource waste, facilitating the intelligent and unmanned construction of coal mines, and improving the accuracy, comprehensiveness, and intelligence of underground air quality monitoring.

[0102] To implement the above embodiments, this application also proposes a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the intelligent monitoring and purification method for underground air as proposed in the second aspect of the present application.

[0103] It should be noted that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0104] Furthermore, in the description of this application, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0105] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0106] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0107] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0108] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this invention.

Claims

1. A smart monitoring and purification system for underground air in mines, characterized in that, include: The system comprises a detection device, an air purification device, and a wireless communication device. The detection device includes: a main control module, multiple gas detection sensors, a motor, and a gas inlet / outlet device. The detection device establishes a communication connection with the air purification device through the wireless communication device; The main control module is used to control the working status of multiple related devices in the intelligent monitoring and purification system for underground air, monitor the working parameters of the multiple related devices, and perform calculations on the data collected by the multiple gas detection sensors to determine whether to perform air purification or early warning processing. The multi-type gas detection sensors are used to monitor the indicators of various types of gases and dust in the target area downhole in a synchronized time sequence according to the common clock signal output by the main control module. The air purification device is connected to the ventilation system in the mine. The air purification device is used to adjust the air volume in the mine in conjunction with the ventilation system so as to remove harmful gases through ventilation. The wireless communication device is used to transmit the data information output by the detection device to the ground control center via wireless communication. The gas inlet / outlet device includes an air duct, and the various gas detection sensors are arranged in the air duct. The electric motor is used to introduce air into the air duct within the target area; During air monitoring, the motor is turned on to allow air to flow into the air duct, and the multi-gas detection sensors are put into a standby timed detection state. The air detection data collected by the multi-gas detection sensors is compared with ordinary abnormal thresholds and alarm abnormal thresholds. When the air detection data exceeds the ordinary abnormal threshold, the air purification device is turned on and switched to real-time detection mode. In the real-time detection mode, the real-time air detection data continuously collected by the multi-gas detection sensors is acquired. When the real-time air detection data returns to a safe range, the air purification device is turned off and switched back to timed detection mode. When the real-time air detection data changes to exceed the alarm abnormal threshold, a warning message is sent to the ground control center via a wireless communication device.

2. The intelligent monitoring and purification system for underground air in mines according to claim 1, characterized in that, The detection device further includes a gas detection data processing circuit, which includes: An amplifier, wherein the amplifier is used to amplify the electromotive force signal input from the multi-type gas detection sensor; A low-pass filter circuit, which is used to filter the amplified signal; An analog-to-digital converter (ADC) is used to convert the filtered analog signal output from the low-pass filter circuit into a digital signal and transmit the digital signal to the main control module.

3. The intelligent monitoring and purification system for underground air in mines according to claim 1, characterized in that, The detection device further includes a power supply module, which comprises a system power supply unit and a motor power supply unit, wherein... The system power supply unit includes: a system battery pack, a system overcurrent protection board, a system power interface, a system power monitoring circuit, a microcontroller interface circuit, and a sensor power supply circuit; The motor power supply unit includes: a motor battery pack, a motor overcurrent protection board, a motor power interface, a boost circuit, a motor power supply monitoring circuit, a motor control circuit, and a power isolation circuit.

4. The intelligent monitoring and purification system for underground air in mines according to claim 1, characterized in that, The wireless communication device is a WIFI communication module, which is used to realize data interaction between the detection device, the ground control center and the air purification device. The various devices within the intelligent monitoring and purification system for underground air communicate with each other via an RS485 communication bus.

5. The intelligent monitoring and purification system for underground air in mines according to claim 1, characterized in that, The detection device further includes: A storage module is provided for storing the data collected by the multi-type gas detection sensors according to time information.

6. The intelligent monitoring and purification system for underground air in mines according to claim 1, characterized in that, The detection device further includes: The dust removal module removes dust from the air in the target area after receiving a dust removal command from the main control module.

7. A method for intelligent monitoring and purification of air in underground mines, characterized in that, The method, applied to the intelligent monitoring and purification system for underground air in mines as described in any one of claims 1-6, comprises the following steps: At preset time intervals, multiple gas detection sensors are controlled to periodically detect the air in the target area downhole; The air detection data collected by the multi-type gas detection sensors is compared with different abnormal thresholds, and the corresponding purification strategy is executed according to the comparison results. The different abnormal thresholds include ordinary abnormal thresholds and alarm abnormal thresholds. When the air detection data is greater than the ordinary abnormal threshold, the air purification device is controlled to turn on and switch to real-time detection mode. If the real-time air quality monitoring data changes to a level greater than the alarm anomaly threshold, an early warning message is sent to the ground control center via a wireless communication device, and disaster prevention and control measures are implemented.

8. The intelligent monitoring and purification method for underground air in mines according to claim 7, characterized in that, After the air purification device is turned on and switched to real-time monitoring mode, the system further includes: Acquire real-time air detection data continuously collected by the various types of gas detection sensors; Once the real-time air quality monitoring data returns to a safe range, the air purification device is controlled to shut down and switch back to a state of periodic air quality monitoring within the target area.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the intelligent monitoring and purification method for underground air as described in any one of claims 7-8.

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