CN-121978057-A - Colliery is multi-gas intelligent monitoring system in pit based on laser and chromatographic combination

CN121978057ACN 121978057 ACN121978057 ACN 121978057ACN-121978057-A

Abstract

The invention relates to the technical field of gas monitoring and discloses a coal mine underground multi-gas intelligent monitoring system based on laser and chromatograph combination, which comprises a laser detection end, a chromatograph analysis end, a combination control end, an intelligent monitoring end, a user interaction end, a calibration maintenance end, an intelligent decision end and a communication end; through the collaborative combination of laser detection and chromatographic analysis technology, the mixed gas is separated by utilizing the chromatographic technology, specific gas components are identified by combining the laser, the monitoring error problem caused by the cross interference of the mixed gas components can be solved, the accuracy of multi-gas concentration detection is ensured, the reliability of gas component analysis in a complex environment is improved, the gas concentration trend is analyzed in real time through the data fusion and trend prediction functions of the intelligent monitoring end, the mode switching mechanism of the combined control end is combined, the detection strategy is dynamically adjusted according to environmental parameters, and the adaptability and stability of the monitoring system under the complex working condition are enhanced.

Inventors

TONG XIAODONG
HUANG YOULIN
XING YUFENG
Fu Qinglai
WANG GUODONG
ZHANG GANGGANG
SHEN HAO

Assignees

山东朗辉测控设备有限公司

Dates

Publication Date: 20260505
Application Date: 20260130

Claims (10)

1. A coal mine underground multi-gas intelligent monitoring system based on laser and chromatograph combination is characterized by comprising: The laser detection end is used for collecting concentration data of multiple gases in the underground coal mine in real time through a tunable laser spectrum technology and identifying gas components based on a preset gas absorption spectrum line database; the chromatographic analysis end is used for separating the mixed gas by a gas chromatography technology provided with a special chromatographic column and carrying out qualitative and quantitative analysis of multiple gases based on chromatographic peak data; the combined control end is used for coordinating the operation strategy of laser detection and chromatographic analysis through an intelligent mode switching mechanism and selecting among laser priority, chromatographic priority and parallel detection modes according to the monitoring requirements; The intelligent monitoring end is used for fusing detection data of laser and chromatograph, and carrying out gas concentration trend prediction and abnormal leakage early warning through a machine learning algorithm; The user interaction end provides man-machine interaction functions of real-time data visualization, history report inquiry and safe operation through integrating a touch display screen, an automatic report generation engine and a multi-level authority control module; the calibration maintenance end realizes regular automatic calibration through a built-in standard gas pool and has fault log recording and remote firmware upgrading capabilities; The intelligent decision terminal is used for providing security risk quantitative assessment, automatic emergency response triggering and production optimization suggestion based on real-time monitoring data by constructing a risk assessment model, a linkage emergency control interface and a data analysis algorithm; The communication end is used for transmitting the monitoring data, the early warning information and the system state to the ground monitoring center and the cloud platform through the wireless network.
2. The underground coal mine multi-gas intelligent monitoring system based on the combination of laser and chromatograph, which is disclosed in claim 1, is characterized in that the laser detection end comprises a laser emission module, a spectrum acquisition module and a gas identification module; The laser emission module is used for generating tunable laser beams, adjusting the laser wavelength through the laser driving circuit to enable the laser beams to be matched with the absorption spectrum line of specific gas, and optimally setting methane, carbon monoxide and carbon dioxide which are common gases in the coal mine well; the spectrum acquisition module is used for receiving an attenuated light signal of the laser after passing through the gas sample through the photoelectric detector, converting the light signal into an electric signal, realizing signal digitization by utilizing the analog-to-digital converter and generating high-resolution spectrum data; The gas identification module is used for identifying the gas type through database comparison based on the spectrum data, the database pre-stores standard gas absorption spectrum lines, and a pattern identification algorithm is adopted to process the spectrum data.
3. The underground multi-gas intelligent monitoring system for the coal mine based on the combination of laser and chromatograph, which is disclosed in claim 1, is characterized in that the chromatograph analysis end comprises a sample injection module, a separation module and a detection output module; the sample injection module is used for collecting underground coal mine gas samples through the automatic sample injector and preprocessing the samples, including dust filtering and humidity adjustment; The separation module is used for separating a gas sample by utilizing a chromatographic column, the chromatographic column is filled with a specific adsorbent, the separation is realized according to the polarity difference of the gas, and the separation process is controlled by temperature programming; the detection output module is used for detecting the separated gas components through the thermal conductivity detector, generating a chromatographic peak diagram, calculating the concentration of each gas based on the peak area and the retention time, and outputting a standardized data format.
4. The underground multi-gas intelligent monitoring system for the coal mine based on the combination of laser and chromatograph, which is disclosed in claim 1, is characterized in that the combination control end comprises a mode switching module, a synchronous control module and an optimization calibration module; The mode switching module is used for intelligently selecting a detection mode according to the underground environment parameters of the coal mine, starting a laser priority mode when the gas concentration is changed rapidly, starting a chromatographic priority mode when high-precision multi-gas analysis is needed, and simultaneously running two technologies to cross-verify data; the synchronous control module is used for carrying out alignment treatment on data streams from the laser detection end and the chromatographic analysis end through a time stamp mechanism; the optimization calibration module is used for automatically calibrating the laser and the chromatographic system at regular intervals, correcting the base line by using a standard gas sample and adjusting parameters through feedback.
5. The underground multi-gas intelligent monitoring system based on the combination of laser and chromatograph, which is disclosed in claim 1, is characterized in that the intelligent monitoring terminal comprises a data fusion module, a trend prediction module and an early warning evaluation module; The data fusion module is used for integrating multi-source data of the laser detection end and the chromatographic analysis end, eliminating redundant information by adopting a data weighted fusion algorithm, and generating a unified gas concentration report; The trend prediction module is used for predicting the gas concentration change trend through a time sequence analysis model based on historical monitoring data and carrying out self-adaptive learning by combining the underground working period of the coal mine; the early warning evaluation module is used for setting a gas concentration threshold value, triggering multi-stage early warning when the detection value exceeds the threshold value and the predicted trend is abnormal, and evaluating the leakage risk level.
6. The intelligent monitoring system for underground coal mine multi-gas based on laser and chromatograph combination of claim 5, wherein the specific operation of triggering the multi-stage early warning comprises the following steps: When the gas concentration exceeds a first-level threshold value, starting on-site audible and visual alarm; when the gas concentration exceeds a second-level threshold value, sending early warning information to a preset safety liability person mobile terminal; And when the gas concentration exceeds the third-stage threshold value and the predicted trend shows that the risk is sharply increased, automatically sending an interlocking shutdown instruction to the underground ventilation system and the operation control system.
7. The underground multi-gas intelligent monitoring system for the coal mine based on the combination of laser and chromatograph, which is disclosed in claim 1, is characterized in that the user interaction end comprises a display operation module, a report generation module and a permission management module; the display operation module is used for displaying monitoring data, early warning information and system states in real time through the touch screen display, and supporting manual intervention of a user to detect parameters; The report generation module is used for automatically generating daily reports, weekly reports and monthly reports, including gas concentration statistics, early warning records and system performance indexes, and exporting the daily reports, weekly reports and monthly reports into a structured data file; the authority management module is used for configuring differentiated system operation instruction execution authority and data access authority levels for user accounts with different roles.
8. The underground multi-gas intelligent monitoring system for the coal mine based on the combination of laser and chromatograph, which is disclosed in claim 1, is characterized in that the calibration maintenance end comprises an automatic calibration module, a fault log module and a remote upgrading module; the automatic calibration module is used for regularly using standard gas to perform system calibration, and detecting parameters are adjusted by comparing measured values with standard values; The fault log module is used for recording abnormal events in the running of the system and generating log files; The remote upgrading module is used for downloading a firmware upgrading packet from a designated server and cloud platform, and executing firmware installation and system restarting operation after verifying the integrity and the safety of the firmware upgrading packet.
9. The underground multi-gas intelligent monitoring system for the coal mine based on the combination of laser and chromatograph, which is disclosed in claim 1, is characterized in that the intelligent decision-making end comprises a risk assessment module, an emergency response module and an optimization suggestion module; The risk assessment module is used for calculating the probability of risk of explosion and poisoning of gas under the coal mine based on the monitoring data and the environment model and providing risk level output; The emergency response module is used for automatically triggering emergency measures under the condition of high risk and is linked with the coal mine safety system; The optimization suggestion module is used for analyzing the monitoring data and providing operation optimization suggestions.
10. The underground multi-gas intelligent monitoring system for the coal mine based on the combination of laser and chromatograph, which is disclosed in claim 1, is characterized in that the communication end comprises a wireless transmission module, a data encryption module and a cloud synchronization module; the wireless transmission module is used for transmitting the monitoring data to the ground server through a wireless communication technology and supporting the use of a repeater in a signal weak area; the data encryption module is used for encrypting the transmission data by adopting an AES encryption algorithm; the cloud synchronization module is used for backing up data to the cloud platform, and multi-terminal access and historical data backtracking are achieved.

Description

Colliery is multi-gas intelligent monitoring system in pit based on laser and chromatographic combination Technical Field The invention relates to the technical field of gas monitoring, in particular to an underground multi-gas intelligent monitoring system for a coal mine based on laser and chromatograph combination. Background At present, because the underground coal mine environment is complex and changeable and various gas mixing interferences exist, when multi-gas real-time monitoring is carried out, the traditional single sensor technology has limitations, while the laser detection technology has high sensitivity, the mixed gas components cannot be separated, the concentration erroneous judgment under the gas cross interference can be caused, when the gas absorption spectrum line overlapping and the background noise interference occur, the systematic deviation of monitoring data can be caused, and the accuracy of multi-gas detection cannot be ensured. Therefore, an intelligent underground coal mine multi-gas monitoring system based on laser and chromatograph combination is provided to solve the problems. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a coal mine underground multi-gas intelligent monitoring system based on laser and chromatograph combination, which solves the problems that systematic deviation of monitoring data is proposed in the background art and the accuracy of multi-gas detection cannot be ensured. In order to achieve the purpose, the invention provides the following technical scheme for realizing the underground multi-gas intelligent monitoring system of the coal mine based on the combination of laser and chromatograph, which comprises the following steps: The laser detection end is used for collecting concentration data of multiple gases in the underground coal mine in real time through a tunable laser spectrum technology and identifying gas components based on a preset gas absorption spectrum line database; the chromatographic analysis end is used for separating the mixed gas by a gas chromatography technology provided with a special chromatographic column and carrying out qualitative and quantitative analysis of multiple gases based on chromatographic peak data; the combined control end is used for coordinating the operation strategy of laser detection and chromatographic analysis through an intelligent mode switching mechanism and selecting among laser priority, chromatographic priority and parallel detection modes according to the monitoring requirements; The intelligent monitoring end is used for fusing detection data of laser and chromatograph, and carrying out gas concentration trend prediction and abnormal leakage early warning through a machine learning algorithm; The user interaction end provides man-machine interaction functions of real-time data visualization, history report inquiry and safe operation through integrating a touch display screen, an automatic report generation engine and a multi-level authority control module; the calibration maintenance end realizes regular automatic calibration through a built-in standard gas pool and has fault log recording and remote firmware upgrading capabilities; The intelligent decision terminal is used for providing security risk quantitative assessment, automatic emergency response triggering and production optimization suggestion based on real-time monitoring data by constructing a risk assessment model, a linkage emergency control interface and a data analysis algorithm; The communication end is used for transmitting the monitoring data, the early warning information and the system state to the ground monitoring center and the cloud platform through the wireless network. Preferably, the laser detection end comprises a laser emission module, a spectrum acquisition module and a gas identification module; The laser emission module is used for generating tunable laser beams, adjusting the laser wavelength through the laser driving circuit to enable the laser beams to be matched with the absorption spectrum line of specific gas, and optimally setting methane, carbon monoxide and carbon dioxide which are common gases in the coal mine well; the spectrum acquisition module is used for receiving an attenuated light signal of the laser after passing through the gas sample through the photoelectric detector, converting the light signal into an electric signal, realizing signal digitization by utilizing the analog-to-digital converter and generating high-resolution spectrum data; The gas identification module is used for identifying the gas type through database comparison based on the spectrum data, the database pre-stores standard gas absorption spectrum lines, and a pattern identification algorithm is adopted to process the spectrum data. Preferably, the chromatographic analysis end comprises a sample injection module, a separation module and a detection output module; the sample injection mod