Coal seam dry-type punching carbon monoxide real-time monitoring device and method

Abstract

The invention relates to the technical field of test wire storage, and particularly discloses a coal seam dry-type punching carbon monoxide real-time monitoring device and method.The coal seam dry-type punching carbon monoxide real-time monitoring device comprises a gas-dust separation module, a coal seam dry-type punching carbon monoxide real-time monitoring module and a coal seam dry-type punching carbon monoxide real-time monitoring module, the dual-mode sensor module comprises an infrared CO sensor and a laser scattering dust sensor which are respectively used for detecting the carbon monoxide concentration and the dust concentration; the signal processing and control unit is used for receiving data of the dual-mode sensor module and processing and analyzing the data; by adopting the combined design of the cyclone separator and the nano ceramic filter element, large-particle dust and fine dust in gas can be efficiently removed, and the sensor is effectively prevented from being polluted by dust, so that the accuracy and reliability of CO concentration detection are greatly improved. And continuous and automatic monitoring of CO concentration and dust concentration is realized by using a dual-mode sensor cooperative detection technology.

Description

Technical Field

[0001] The present invention relates to the technical field of test line storage, in particular to a device and method for real-time monitoring of carbon monoxide by dry drilling in a coal seam. Background Art

[0002] During coal mining, especially during dry drilling operations in coal seams, the lack of effective dust suppression measures can lead to high temperatures generated by friction between the drill bit and the coal, which can easily trigger oxidation reactions in the coal, generating carbon monoxide (CO). This phenomenon not only threatens the safety of underground workers but also increases the risk of explosions and poisoning. Therefore, real-time and accurate monitoring of CO concentrations in the drilling environment is crucial.

[0003] However, existing monitoring technologies have numerous shortcomings. First, high dust concentrations can easily contaminate sensors, reducing detection accuracy. Second, manually operated, intermittent monitoring methods cannot provide continuous, reliable monitoring data. Third, existing equipment is poorly adapted to harsh environments such as high temperature, high humidity, and strong vibration, resulting in significant data drift, which affects the accuracy of monitoring results. Furthermore, traditional monitoring systems often lack effective integration with mine safety systems, making rapid response and early warning capabilities difficult to achieve. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that the monitoring technology is limited by high-concentration dust pollution sensors, intermittent detection relying on manual operation, poor environmental adaptability and lack of data linkage with the safety system, resulting in monitoring lag and high false alarm rate.

[0005] The above technical problems are solved by the following technical solutions: The present invention provides a device and method for real-time monitoring of carbon monoxide in dry drilling of coal seams, which includes a gas-dust separation module, wherein the gas-dust separation module is used to separate dust from the dust-laden gas discharged from the drilling hole;

[0006] A dual-mode sensor module, comprising an infrared CO sensor and a laser scattering dust sensor, for detecting carbon monoxide concentration and dust concentration, respectively; and

[0007] a signal processing and control unit, configured to receive, process, and analyze data from the dual-mode sensor module;

[0008] Among them, the gas-dust separation module includes a cyclone separator and a nano-ceramic filter element. The cyclone separator adopts a conical cylindrical structure and uses centrifugal force to separate large particles of dust. The nano-ceramic filter element is located at the rear end of the cyclone separator, intercepts the remaining fine dust, and automatically cleans it through reverse pulse airflow.

[0009] In a preferred embodiment of the device for real-time monitoring of carbon monoxide in dry-type drilling of coal seams according to the present invention: the infrared CO sensor is based on the principle of non-dispersive infrared (NDIR).

[0010] In a preferred embodiment of the device for real-time monitoring of carbon monoxide in dry-type drilling of coal seams according to the present invention, the laser scattering dust sensor adopts a 650nm laser diode and a photodetector.

[0011] In a preferred embodiment of the coal seam dry drilling carbon monoxide real-time monitoring device of the present invention: the dual-mode sensor module includes a dynamic temperature and pressure compensation algorithm, and through the integration of a digital temperature and humidity sensor and an air pressure sensor, the carbon monoxide concentration is calibrated in real time to ensure that the accuracy error under all working conditions is ≤±3%.

[0012] In a preferred embodiment of the device for real-time monitoring of carbon monoxide in dry-type drilling of coal seams of the present invention: a multi-level alarm system is installed on the side wall of the dual-mode sensor module, and the multi-level alarm system includes a three-level alarm mechanism.

[0013] In a preferred embodiment of the method for real-time monitoring of carbon monoxide in dry drilling of coal seams of the present invention: the dust-laden gas discharged from the drilling hole is purified by a gas-dust separation module;

[0014] Use a dual-mode sensor module to detect carbon monoxide concentration and dust concentration in the purified gas;

[0015] Use dynamic temperature and pressure compensation algorithm to correct the carbon monoxide concentration detection value according to the ambient temperature and pressure;

[0016] The corrected carbon monoxide concentration value is compared with the preset threshold value and the corresponding alarm level is triggered.

[0017] In a preferred embodiment of the method for real-time monitoring of carbon monoxide in coal seam dry drilling described in the present invention: the inlet diameter of the cyclone separator is 50 mm, the cone angle is 15°, the airflow spirals downward at a tangential speed of 15-20 m / s, and the nano-ceramic filter element is located at the rear end of the cyclone separator, consists of multiple layers of sintered ceramics, has a pore size of 0.1 μm, and a porosity of 40%.

[0018] In a preferred embodiment of the method for real-time monitoring of carbon monoxide in dry-type coal seam drilling described in the present invention: in the temperature and pressure compensation step, a digital temperature and humidity sensor and an air pressure sensor are used to collect environmental parameters in real time, and a CO concentration correction value after temperature and pressure compensation is calculated based on a specific formula.

[0019] In a preferred embodiment of the method for real-time monitoring of carbon monoxide in dry drilling of coal seams described in the present invention: in the data processing and alarm step, when the CO concentration reaches or exceeds 24 ppm, a first-level alarm is triggered; when it reaches or exceeds 50 ppm, a second-level alarm is triggered and the power supply of the drilling rig is cut off; when it reaches or exceeds 100 ppm, a third-level alarm is triggered and the alarm information is pushed to the mine monitoring center.

[0020] In a preferred embodiment of the method for real-time monitoring of carbon monoxide in dry drilling of coal seams of the present invention, the infrared CO sensor has a range of 0-1000ppm, a resolution of 1ppm, and a built-in reference gas chamber to eliminate cross-gas interference; the laser scattering dust sensor uses a 650nm laser diode and a photoelectric detector to measure dust concentration in real time within the range of 0-200mg / m 3 And the temperature compensation circuit is used to eliminate the influence of ambient temperature drift.

[0021] The beneficial effects of the present invention are as follows: by integrating the gas-dust separation module and adopting a combined design of a cyclone separator and a nano-ceramic filter element, large particles of dust and fine dust in the gas can be efficiently removed, effectively preventing the sensor from being contaminated by dust, thereby greatly improving the accuracy and reliability of CO concentration detection.

[0022] Utilizing dual-mode sensor collaborative detection technology, the system achieves continuous, automated monitoring of CO and dust concentrations. Combined with a dynamic temperature and pressure compensation algorithm, it ensures data accuracy under a wide range of environmental conditions. The application of a multi-level alarm mechanism and multi-mode communication technology enables real-time early warning and rapid response to CO concentration exceeding the specified limit, significantly reducing the risk of explosion or poisoning caused by CO accumulation.

[0023] The device features an explosion-proof aluminum alloy housing and built-in silicone shock-absorbing pads, ensuring excellent vibration resistance and stability in high-temperature, high-humidity, and high-vibration environments. This enables the device to operate stably in the harsh working environment of underground coal mines, reducing data drift caused by environmental factors.

[0024] This invention supports deep integration with mine safety systems, such as personnel positioning systems and ventilation control systems, to achieve closed-loop safety management. Through a three-level alarm mechanism and multi-mode communication technology, it not only enables rapid response in emergencies but also uploads monitoring data to the cloud for integrated analysis, providing a scientific basis for subsequent safety decisions.

[0025] The application of collaborative dust and CO detection technology uses laser scattering to measure dust concentration in real time and adjusts the CO sensor output accordingly, reducing errors by over 80%. Simultaneously, an adaptive Kalman filter algorithm denoises the sensor signal, further improving data accuracy and reliability and reducing false alarm rates. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Among them:

[0027] Figure 1 The overall structure diagram of the coal seam dry drilling carbon monoxide real-time monitoring device is shown;

[0028] Figure 2 The figure shows the internal structure of the real-time monitoring device for carbon monoxide in dry drilling of coal seams;

[0029] Figure 3 The schematic diagram of the process structure framework of the coal seam dry drilling carbon monoxide real-time monitoring device is shown. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0031] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0032] Reference Figure 1-Figure 2 ,This embodiment provides a real-time monitoring device and method for carbon monoxide in dry drilling of coal seams, including, a gas-dust separation module 1, the gas-dust separation module 1 being used to separate dust from the dust-laden gas discharged from the drilling hole;

[0033] A dual-mode sensor module 2, comprising an infrared CO sensor and a laser scattering dust sensor, for detecting carbon monoxide concentration and dust concentration, respectively, wherein the dual-mode sensor module 2 is connected to a multi-level alarm system 4 and a signal processing and control unit 3; and

[0034] A signal processing and control unit 3, which is used to receive data from the dual-mode sensor module 2 and process and analyze it, and is connected to the drilling rig PLC control;

[0035] Among them, the gas-dust separation module 1 includes a cyclone separator 11 and a nano-ceramic filter element 12. The cyclone separator 11 adopts a conical cylindrical structure and uses centrifugal force to separate large particles of dust. The nano-ceramic filter element 12 is located at the rear end of the cyclone separator 11, intercepting the remaining fine dust and automatically cleaning it through reverse pulse airflow.

[0036] The cyclone separator 11 features a conical cylindrical structure with an inlet diameter of 50 mm and a cone angle of 15°. It uses centrifugal force to separate large dust particles (≥10 μm), achieving a separation efficiency of ≥95%. Airflow spirals downward at a tangential velocity of 15-20 m / s, depositing dust into a 500 mL collection chamber at the bottom, which is removable for cleaning.

[0037] The nano-ceramic filter element 12 is located at the rear end of the cyclone separator 11 and is composed of multiple layers of sintered ceramics (pore size 0.1μm, porosity 40%). It intercepts the remaining fine dust (the interception rate of particles above PM2.5 is ≥99%) and automatically cleans the dust through reverse pulse airflow (the cycle is adjustable, the default is 30 minutes / time).

[0038] Reference Figure 2 As an optional embodiment, the infrared CO sensor is based on the non-dispersive infrared (NDIR) principle.

[0039] The laser scattering dust sensor uses a 650nm laser diode and a photodetector.

[0040] The dual-mode sensor module 2 includes a dynamic temperature and pressure compensation algorithm. By integrating a digital temperature and humidity sensor and an air pressure sensor, it calibrates the carbon monoxide concentration in real time, ensuring an accuracy error of ≤±3% under all working conditions.

[0041] A multi-stage alarm system 4 is installed on the side wall of the dual-mode sensor module 2. The multi-stage alarm system 4 includes a three-stage alarm mechanism.

[0042] Infrared CO sensor: Based on the non-dispersive infrared (NDIR) principle, it has a range of 0-1000ppm and a resolution of 1ppm. It also features a built-in reference gas chamber to eliminate cross-gas interference (such as CH4 and CO2). The optical path is perpendicular to the airflow direction to prevent dust from adhering to the optical window.

[0043] Laser scattering dust sensor: uses 650nm laser diode and photodetector (60° scattering angle) to measure dust concentration (0-200mg / m 3 The output signal is used to dynamically correct the CO detection value. The temperature compensation circuit (±0.1°C accuracy) eliminates the influence of ambient temperature drift.

[0044] Reference Figure 2-Figure 3 In one embodiment provided in this application, it further includes:

[0045] S1: The dust-laden gas discharged from the drilling hole is purified through the gas-dust separation module;

[0046] It should be noted that the device requires power supply A to be activated first. After the explosion-proof power supply A module is powered on, it will give priority to powering the signal processing unit B and start the ARM microcontroller.

[0047] The infrared CO sensor then performs a zero-point calibration. The laser scattering dust sensor initiates laser preheating to detect contamination in the optical path. If the scattering signal baseline exceeds the limit, the nano-ceramic filter element 12 is triggered to reversely clean the dust. The temperature and pressure compensation module reads the current environmental parameters (temperature T, air pressure P) and stores them as a calibration reference. The LoRa wireless data transmission module C sends a test signal to the mine gateway to confirm the signal strength.

[0048] Dust-laden gas discharged from the drilling enters cyclone separator 11 from the air inlet at a velocity of approximately 5 m / s. The inlet is designed with a 30° bevel angle to enhance airflow rotation. The airflow forms a spiral motion within cyclone separator 11 (tangential velocity ≥ 15 m / s), and dust particles ≥ 10 μm are thrown into the collection chamber due to centrifugal force. The remaining gas passes through the nano-ceramic filter element 12, intercepting fine dust (PM2.5-10 μm) (efficiency ≥ 99%). The purified gas enters the sensor compartment at a constant flow rate of 1.5 L / min, which houses surface-mounted CO, dust, temperature, and air pressure sensors.

[0049] S2: Use the dual-mode sensor module 2 to detect the carbon monoxide concentration and dust concentration in the purified gas;

[0050] The infrared CO sensor transmits infrared light (wavelength 4.6μm) through the gas, detects the absorption spectrum intensity of CO molecules, and outputs the original concentration value. The laser scattering sensor emits a 650nm laser, measures the intensity of light scattered by dust, and outputs the dust concentration. The temperature and pressure compensation module uses a specific formula to correct for environmental parameter effects based on real-time temperature and pressure values, ensuring that the CO concentration reflects the actual value. The ARM microcontroller compares the pre- and post-correction data. If the error exceeds 10%, it triggers filter cleaning or sensor recheck.

[0051] S3: Use dynamic temperature and pressure compensation algorithm to correct the carbon monoxide concentration detection value according to the ambient temperature and pressure;

[0052] Digital temperature and humidity sensors and air pressure sensors are used to collect environmental parameters in real time, and the CO concentration correction value after temperature and pressure compensation is calculated based on a specific formula.

[0053] In the data processing and alarm steps, when the CO concentration reaches or exceeds 24ppm, a level one alarm is triggered; when it reaches or exceeds 50ppm, a level two alarm is triggered and the power supply to the drilling rig is cut off; when it reaches or exceeds 100ppm, a level three alarm is triggered and an alarm message is pushed to the mine monitoring center.

[0054] The infrared CO sensor has a range of 0-1000ppm and a resolution of 1ppm. It has a built-in reference gas chamber to eliminate cross-gas interference. The laser scattering dust sensor uses a 650nm laser diode and a photodetector to measure dust concentration in real time within the range of 0-200mg / m 3 And the temperature compensation circuit is used to eliminate the influence of ambient temperature drift.

[0055] S4: Compare the corrected carbon monoxide concentration value with a preset threshold value and trigger a corresponding alarm level.

[0056] According to the different levels of carbon monoxide concentration, the corresponding local sound and light alarm, drilling rig emergency stop control and mine-level emergency response linkage are triggered. If the gas line pressure difference ΔP ≥ 500Pa (normal range 100 ~ 300Pa), the filter element is determined to be blocked, the local yellow LED is triggered to light up, and a maintenance request is reported. If the wireless signal is lost for more than 10 minutes, the data is automatically stored in the local Flash and retransmitted in batches after the signal is restored. When the battery power is ≤ 20%, non-essential modules (such as LED indicators) are turned off, and only the core sensor sampling is maintained (the frequency is reduced to 0.1Hz).

[0057] Inter-module data flow: Purified gas serves as the detection input. Raw data (CO concentration, dust concentration, and temperature and pressure parameters) is transmitted via the I2C bus. Threshold determination results trigger audible and visual alarms via GPIO pins. Emergency stop commands are sent via RS485, using a CRC-16 checksum to ensure reliability. Encrypted data packets are uploaded via the wireless module, using AES-256 encryption for secure transmission.

[0058] Reference Figure 2 As an optional embodiment, the inlet diameter of the cyclone separator 11 is 50 mm, the cone angle is 15°, the airflow spirals downward at a tangential speed of 15-20 m / s, and the nano-ceramic filter element 12 is located at the rear end of the cyclone separator. It is composed of multiple layers of sintered ceramics, has a pore size of 0.1 μm, and a porosity of 40%.

[0059] In the temperature and pressure compensation step, digital temperature and humidity sensors and air pressure sensors are used to collect environmental parameters in real time, and the CO concentration correction value after temperature and pressure compensation is calculated based on a specific formula.

[0060] In the data processing and alarm steps, when the CO concentration reaches or exceeds 24ppm, a level one alarm is triggered; when it reaches or exceeds 50ppm, a level two alarm is triggered and the power supply to the drilling rig is cut off; when it reaches or exceeds 100ppm, a level three alarm is triggered and an alarm message is pushed to the mine monitoring center.

[0061] The infrared CO sensor has a range of 0-1000ppm and a resolution of 1ppm. It has a built-in reference gas chamber to eliminate cross-gas interference. The laser scattering dust sensor uses a 650nm laser diode and a photodetector to measure dust concentration in real time within the range of 0-200mg / m 3 And the temperature compensation circuit is used to eliminate the influence of ambient temperature drift.

[0062] In some embodiments, the temperature and pressure compensation unit: an integrated digital temperature and humidity sensor (SHT35, accuracy ±1.5% RH) and an air pressure sensor (BMP388, resolution 0.016 hPa), based on the formula

[0063]

[0064] C calibration: The corrected value of carbon monoxide (CO) concentration after temperature and pressure compensation, in ppm. Purpose: Eliminates the effect of ambient temperature and pressure changes on gas volume, ensuring that the measured value reflects the true concentration.

[0065] Craw: The raw CO concentration value (uncompensated) directly measured by the sensor, in ppm. It is converted from the uncalibrated signal output by the infrared CO sensor.

[0066] P: Current ambient air pressure, in hPa (hectopascals). This value is collected in real time by a high-precision digital pressure sensor with a range of 300 to 1100 hPa. The baseline value is 1013.25 hPa, which is standard atmospheric pressure (corresponding to sea level pressure).

[0067] T: Current ambient temperature, in degrees Celsius. Collected in real time by a digital temperature and humidity sensor, with a range of -40°C to 120°C. Reference value: Numerator: 273.15 + T. Converts Celsius to Kelvin (K). Denominator: 298.15K corresponds to 25°C (standard laboratory calibration temperature), which is used to eliminate the effects of temperature on gas molecular activity.

[0068] Formula meaning:

[0069] Pressure correction: Gas volume expands or compresses as pressure changes (ideal gas law), which needs to be corrected by Correct the concentration at the current air pressure to the standard air pressure value.

[0070] Temperature correction: Increased temperature will lead to increased diffusion of gas molecules, through The concentration values ​​at actual temperature were corrected to the standard condition of 25°C.

[0071] Example:

[0072] Assume downhole environment: C original = 50 ppm; P = 950 hPa; T = 30°C.

[0073] The corrected concentration is:

[0074]

[0075] By real-time calibration of CO concentration, the accuracy error under all working conditions is ensured to be ≤±3%.

[0076] Signal processing and control unit

[0077] Main control chip: ARM Cortex-M4 microcontroller (STM32F407, main frequency 168MHz), built-in adaptive Kalman filter algorithm, denoising and dynamic calibration of sensor signals.

[0078] Communication module:

[0079] Wired interface: RS485 (Modbus RTU protocol) connects to the drilling rig PLC and transmits emergency stop control signals (response delay ≤ 100ms).

[0080] Wireless interface: LoRa module (frequency band 433MHz, transmission distance 1km) and 4G module dual backup to ensure the reliability of data upload to the mine monitoring center (packet loss rate ≤ 0.1%).

[0081] Data storage: Built-in Flash memory (capacity 8GB), records CO concentration, dust concentration and alarm events (storage period ≥ 30 days).

[0082] Level 1 alarm (CO ≥ 24 ppm) triggers a 105 dB buzzer (frequency 2 kHz) and a red LED (flashing frequency 2 Hz), which lasts until the concentration falls below the threshold.

[0083] The second level alarm (CO ≥ 50ppm) outputs a dry contact signal (24VDC / 5A) to the drill rig PLC through a relay, cutting off the power supply to the drill rig within 0.5 seconds and locking the operation panel.

[0084] The third-level alarm (CO ≥ 100ppm) pushes alarm information (including GPS positioning coordinates) to the mine monitoring center, and simultaneously activates the underground broadcast system and personnel positioning system for linked evacuation.

[0085] Alarm process: Synchronous sampling frequency (10Hz) of CO concentration, dust concentration, and temperature and pressure parameters. Mark the correction formula for dust concentration to CO detection value.

[0086] A level 1 alarm (24 ppm) triggers a local audible and visual alarm (flashing red LED). A level 2 alarm (50 ppm) sends an emergency stop signal to the drill rig's PLC. A level 3 alarm (100 ppm) sends a push signal to the mine monitoring center (wireless signal transmission icon). The data storage format (e.g., CSV) and upload interval (synchronize every 5 minutes) are indicated.

[0087] Explosion-proof Power Supply Module A: Lithium thionyl chloride explosion-proof battery (12V / 10Ah), battery life ≥ 48 hours, built-in overcharge / over-discharge protection circuit (charge and discharge efficiency ≥ 95%). Supports external 220VAC input (via explosion-proof junction box), automatically switches power supply modes, and monitors battery health status (SOH).

[0088] Finally, it should be pointed out that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. A real-time monitoring device for carbon monoxide in dry drilling of coal seams, characterized by: include, A gas-dust separation module (1), the gas-dust separation module (1) being used to separate dust from dust-laden gas discharged from a drilling hole; A dual-mode sensor module (2), comprising an infrared CO sensor and a laser scattering dust sensor, for detecting carbon monoxide concentration and dust concentration, respectively; and a signal processing and control unit (3), which is used to receive data from the dual-mode sensor module (2) and perform processing and analysis; The gas-dust separation module (1) comprises a cyclone separator (11) and a nano-ceramic filter element (12); the cyclone separator (11) adopts a conical cylindrical structure and utilizes centrifugal force to separate large dust particles; the nano-ceramic filter element (12) is located at the rear end of the cyclone separator (11) to intercept the remaining fine dust and automatically clean the dust through reverse pulse airflow.

2. The device for real-time monitoring of carbon monoxide in dry-type drilling of coal seams according to claim 1 is characterized in that: The infrared CO sensor is based on the non-dispersive infrared (NDIR) principle.

3. The device for real-time monitoring of carbon monoxide in dry-type drilling of coal seams according to claim 2, characterized in that: The laser scattering dust sensor adopts a 650nm laser diode and a photodetector.

4. The device for real-time monitoring of carbon monoxide in dry-type drilling of coal seams according to claim 3 is characterized in that: The dual-mode sensor module (2) includes a dynamic temperature and pressure compensation algorithm, and performs real-time calibration of the carbon monoxide concentration by integrating a digital temperature and humidity sensor and an air pressure sensor, thereby ensuring that the accuracy error under all working conditions is ≤±3%.

5. The device for real-time monitoring of carbon monoxide in dry-type drilling of coal seams according to claim 4 is characterized in that: A multi-stage alarm system (4) is installed on the side wall of the dual-mode sensor module (2), and the multi-stage alarm system (4) includes a three-stage alarm mechanism.

6. A method for real-time monitoring of carbon monoxide in dry drilling of coal seams, characterized by: The device for real-time monitoring of carbon monoxide in dry drilling of coal seams according to any one of claims 1 to 5 further comprises: The dust-laden gas discharged from the drilling hole is purified by the gas-dust separation module; Use a dual-mode sensor module to detect carbon monoxide concentration and dust concentration in the purified gas; Use dynamic temperature and pressure compensation algorithm to correct the carbon monoxide concentration detection value according to the ambient temperature and pressure; The corrected carbon monoxide concentration value is compared with the preset threshold value and the corresponding alarm level is triggered.

7. The method for real-time monitoring of carbon monoxide in dry drilling of coal seams according to claim 6, characterized in that: The inlet diameter of the cyclone separator is 50 mm, the cone angle is 15 degrees, and the airflow spirals downward at a tangential speed of 15-20 m / s. The nano-ceramic filter element is located at the rear end of the cyclone separator and is composed of multiple layers of sintered ceramics with a pore size of 0.1 μm and a porosity of 40%.

8. The method for real-time monitoring of carbon monoxide in dry drilling of coal seams according to claim 7, characterized in that: In the temperature and pressure compensation step, a digital temperature and humidity sensor and an air pressure sensor are used to collect environmental parameters in real time, and a CO concentration correction value after temperature and pressure compensation is calculated based on a specific formula.

9. The method for real-time monitoring of carbon monoxide by dry drilling in coal seams according to claim 8, characterized in that: In the data processing and alarm steps, when the CO concentration reaches or exceeds 24 ppm, a level one alarm is triggered; when it reaches or exceeds 50 ppm, a level two alarm is triggered and the drilling rig power supply is cut off; when it reaches or exceeds 100 ppm, a level three alarm is triggered and an alarm message is pushed to the mine monitoring center.

10. The method for real-time monitoring of carbon monoxide in dry drilling of coal seams according to claim 9, characterized in that: The infrared CO sensor has a range of 0-1000ppm, a resolution of 1ppm, and a built-in reference gas chamber to eliminate cross-gas interference; the laser scattering dust sensor uses a 650nm laser diode and a photodetector to measure dust concentration in real time within the range of 0-200mg / m 3 And the temperature compensation circuit is used to eliminate the influence of ambient temperature drift.

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