CN115494019B - Remote online detection and early warning system for temperature and gas in fire area of coal field - Google Patents
Remote online detection and early warning system for temperature and gas in fire area of coal field Download PDFInfo
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Abstract
The invention provides a remote online detection and early warning system for temperature and gas in a coal field fire zone, which belongs to the field of coal field fire zone treatment monitoring and early warning and comprises a power supply module, a temperature and gas detection module, a system expansion module, a control module, a wireless communication module and a remote online monitoring and early warning module. The system for remotely and online detecting and early warning the temperature and the gas in the fire area of the coal field improves the problems that the traditional manual monitoring single data acquisition time interval is long, the efficiency is low, and the change condition of the fire area is difficult to track in time, the change trend of the gas concentration, the temperature and the like of the fire situation in the hole can be observed in real time through the temperature-gas detection module, all detected parameters are transmitted to the remote online monitoring and early warning module in real time through the wireless communication module, further, the fire extinguishing situation of the fire area of the coal field is remotely researched, judged and early warned, the parameters of the fire situation of the coal are stored in real time, the targets of early discovery and early treatment of the fire are achieved, and the monitoring and early warning capability of the fire disaster of the coal is improved.
Description
Technical Field
The invention belongs to the field of coal field fire zone treatment monitoring and early warning, and particularly relates to a coal field fire zone temperature-gas remote online detection and early warning system.
Background
The fire extinguishing standard of the coal field provides that the treatment effect of the fire zone of the coal field is mainly analyzed by the change of the temperature of the fire zone, CO and other gases. In the prior art, a manual field detection method is mainly adopted for detecting the temperature and the gas of the fire area of the coal field. The fire areas of the coal fields in China are generally distributed in areas with remote mankind, the intervals among the fire areas are relatively long, the single data acquisition time interval of the monitoring mode is long (data can be acquired only by a few months), the efficiency is low, and the change condition of the fire areas is difficult to track in time. Therefore, there is a need to develop a device and system that can enable remote monitoring of coal field fire zone temperature-gas.
Disclosure of Invention
Aiming at the defects of the prior art, the embodiment of the invention aims to provide a remote on-line detection and early warning system for the temperature and gas of a coal field fire area.
In order to solve the technical problems, the invention provides the following technical scheme:
The system comprises a power supply module, a temperature-gas detection module, a system expansion module, a control module, a wireless communication module and a remote online monitoring and early warning module; the power supply module is used for continuously supplying power to the temperature-gas detection module, the system expansion module, the control module and the wireless communication module under the extreme conditions of the field; the temperature-gas detection module is used for detecting the concentration of CO and C 2H4 gas and the drilling temperature simultaneously; the temperature-gas detection module comprises a drilling temperature test part, a dust removal part, a three-stage steam drying part, a gas pipeline, a gas concentration test part and a device shell; the drilling temperature testing component is used for directly measuring the drilling temperature; the dust removing component is used for purifying tiny dust particles in the gas to be detected so as to prevent the tiny dust particles from blocking a gas pipeline; the three-stage steam drying component is used for drying the gas to be measured so as to remove steam in the gas to be measured; the gas concentration testing component is used for detecting the concentration of spontaneous combustion gas of the coal to be tested; the system expansion module is used for realizing real-time monitoring and temperature adjustment of the running environment of equipment in the device; the wireless communication module is used for realizing remote transmission of system detection data and receiving a feedback adjusting signal; the remote on-line monitoring and early warning module is used for realizing remote control of the power supply module, the temperature-gas detection module and the system expansion module through the wireless communication module and the control module, displaying the variation trend of parameters including the gas concentration, the temperature and the like of the coal fire situation of the drilling hole in real time, and alarming the gas concentration and the temperature exceeding the threshold value; the control module adjusts working states of the power supply module, the temperature-gas detection module and the system expansion module according to remote signals received by the wireless communication module;
The gas concentration test component comprises an infrared broadband light source, a gas absorption tank, an actively tunable multi-channel narrow-band optical filter, a photoelectric detector and a signal processing element, wherein the actively tunable multi-channel narrow-band optical filter is a multi-channel ultra-narrow-band optical filter realized based on a defect mode and guided mode resonance, the infrared broadband light source is used for emitting broadband infrared spectrums containing C 2H4 and CO gas fingerprint characteristic detection wavelengths and reference wavelengths, the gas absorption tank is used for receiving spontaneous combustion gas of coal to be tested after temperature adjustment of a heating and radiating component through an air inlet pipeline, performing characteristic selective absorption on the broadband infrared spectrums emitted by the infrared broadband light source, and the photoelectric detector is used for converting received light intensity signals into first electric signals U ref and U CO, The phase-locked amplifier is used for phase-locked amplifying the first electric signal, and the signal processing element is used for compensating and resolving the first electric signal to obtain the measured concentration/>Obtaining measured concentration of C 2H4 gas/>The real concentration C CO,/>, of CO and C 2H4 gas can be obtained for the first time after the analysis of the cross interference among the gases
The actively tunable multi-channel narrow-band optical filter changes the filtering performance through electric stimulation, and converts the detection wavelength and the reference wavelength after the filtering effect into second electric signals U 'ref and U' CO respectively through the photoelectric detector,Performing compensation calculation to obtain the measured concentration/>, of CO gasObtaining measured concentration of C 2H4 gasThe real concentration C' CO of CO and C 2H4 gas can be obtained for the second time after the analysis of the cross interference among the gases,Thereby obtaining the final detection concentration delta C CO＝(cCO+c'CO)/2 of the CO gas and the final detection concentration of the C 2H4 gas
As a further improvement of the invention: the power supply module comprises an external power generation component and a temperature control storage battery component, wherein a temperature control device is arranged in the temperature control storage battery component and used for realizing temperature control so as to ensure normal work in extremely hot and extremely cold weather.
As a further improvement of the invention: the system expansion module comprises an atmospheric pressure detection component, an ambient temperature detection component, an ambient humidity detection component and a heating and radiating component;
The atmospheric pressure detection component is used for monitoring the atmospheric pressure, the environment temperature detection component is used for monitoring the environment temperature, the environment humidity detection component is used for monitoring the environment humidity, and the heating radiating component is used for adjusting the temperature parameter inside the device under extreme conditions;
The heating radiating component is used for controlling the air inlet temperature of the air flow, and further controlling the air pressure in the air absorption tank by adjusting the air flow speed in the air pipeline and the air absorption tank.
As a still further improvement of the invention: the signal processing element performs inversion calculation on the detected electric signals of the fingerprint characteristic detection wavelength and the reference wavelength based on the beer lambert law to obtain a measured value of the spontaneous combustion gas concentration of the coal to be measured, and the calculation formula is as follows:
Wherein I α、Iβ is the current response without the gas to be detected, R α、Rβ is the system related constant, C α、Cβ is the detector response coefficient, K is the gas flow temperature in the gas absorption tank, L is the gas absorption optical path, and the parameters are constant for the gas detection module; u α、Uβ is the reference voltage and the detection voltage after phase-locked amplification, and the measurement concentration of the gas to be measured can be obtained according to the ratio of the two voltage parameters; when the concentration of the spontaneous combustion gas of the single-component coal is detected, the measured concentration is the true concentration of the gas to be detected When the concentration of the multi-component coal spontaneous combustion gas is detected, the measured concentration of each coal spontaneous combustion gas is subjected to cross interference analysis, so that the true concentration of each gas to be detected can be obtained.
As a still further improvement of the invention: the active tunable multi-channel narrow-band optical filter actively tunes the filtering characteristic of the multi-channel narrow-band optical filter in a mode of controlling the phase state of the phase change material in the multi-channel narrow-band optical filter by electric stimulation, and carries out phase state conversion by the phase change material, so that the detection accuracy is improved: the light intensity signals of the gas under two different detection and reference wavelengths are obtained, the two detection concentrations of the spontaneous combustion gas concentration of the coal to be detected are further remotely obtained, the average value is obtained, and the accuracy of the detection result can be improved.
As a still further improvement of the invention: the wireless communication module selects a 2G/3G/4G network to solve the problem of detection times under different ignition conditions: the device works normally at a collection frequency of 24 times/day under the condition of no ignition, and the collection frequency can be adjusted under the condition of different ignition.
As a still further improvement of the invention: the remote online monitoring and early warning module is constructed based on a Java platform and a MySQL database.
Compared with the prior art, the invention has the beneficial effects that:
1. The remote on-line detection and early warning system for the temperature and the gas of the coal field fire zone improves the problems that the traditional manual monitoring single data acquisition time interval is long and the efficiency is low, and the change condition of the fire zone is difficult to track in time, the change trend of the gas concentration, the temperature and the like of the coal fire situation of a hole can be observed in real time through the temperature-gas detection module, all detected parameters are transmitted to the remote on-line detection and early warning module in real time through the wireless communication module, further, the fire extinguishing development situation of the coal field fire zone is subjected to remote judgment and early warning, the coal fire situation parameters are stored in real time, the targets of early discovery and early treatment of coal fire are achieved, and the monitoring and early warning capability of coal fire hazard is improved.
2. According to the coal field fire zone temperature-gas remote online detection and early warning system, in order to ensure simultaneous detection of coal fire multicomponent gas, the invention can simultaneously realize detection of multicomponent gas and acquisition of reference multichannel light intensity signals through the actively tunable multichannel narrow-band optical filter developed based on defect modes and guided mode resonance, and further realize simultaneous detection of coal spontaneous combustion multicomponent gas on the basis of reducing the number of filters; the multi-channel narrow-band optical filter with the active tunability in the gas concentration test component has the active tunability, the filter filtering characteristics can be actively tuned in a mode of controlling the phase state of the phase change material in the multi-channel narrow-band optical filter through electric stimulation, the acquisition of light intensity signals of one gas under two different detection and reference wavelengths is realized, further, the two detection concentrations of the spontaneous combustion gas concentration of the coal to be tested are remotely realized, the average value is obtained, and the accuracy of the detection result can be improved.
3. The invention relates to a coal field fire zone temperature-gas remote online detection and early warning system, which aims to ensure that the system is applicable under the extreme conditions of the field, a power supply module with a built-in temperature control component can continuously supply power for a temperature-gas detection module, a system expansion module, a control module and a wireless communication module under the extreme conditions of the field, an environment detection component in the system expansion module can monitor the internal environment of a device in real time, and environmental parameters are regulated through a regulating component, so that equipment is in an optimal running state, and the system can be expanded again according to actual requirements to adapt to complex working environments.
Drawings
FIG. 1 is a schematic diagram of the working principle of the present invention;
FIG. 2 is a schematic diagram of a gas detection based on non-dispersive infrared absorption spectroscopy according to the present invention;
In the figure: the device comprises a 1-external power generation component, a 2-temperature control storage battery component, a 3-power supply circuit, a 4-drilling temperature test component, a 5-dedusting component, a 6-three-stage steam drying component, a 7-gas pipeline, an 8-gas concentration test component, a 9-device shell, a 10-atmospheric pressure detection component, a 11-environment temperature detection component, a 12-environment humidity detection component, a 13-heating radiating component, a 14-control module, a 15-data circuit, a 16-wireless communication module, a 17-remote on-line monitoring and early warning module, an I-infrared broadband light source, a II-gas absorption tank, a III-active tunable multichannel narrow-band optical filter, an IV-photoelectric detector and a V-signal processing element.
Detailed Description
The technical scheme of the patent is further described in detail below with reference to the specific embodiments.
Embodiments of the present patent are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present patent and are not to be construed as limiting the present patent.
Referring to fig. 1, the embodiment provides a remote on-line detection and early warning system for temperature and gas in a coal field fire area, which comprises a power supply module, a temperature and gas detection module, a wireless communication module 16, a system expansion module and a remote on-line monitoring early warning module 17. The power supply module comprises an external power generation component 1, a temperature control storage battery component 2 and a power supply circuit 3, the temperature-gas detection module comprises a drilling temperature test component 4, a dust removal component 5, a three-stage steam drying component 6, a gas pipeline 7, a gas concentration test component 8, a device shell 9 and the like, the system expansion module comprises an atmospheric pressure detection component 10, an environment temperature detection component 11, an environment humidity detection component 12, a heating radiating component 13 and the like, the control module 14 can realize the adjustment of the working states of the power supply module, the temperature-gas detection module, the system expansion module and the like, and the wireless communication module 16 can realize the remote transmission of the working information of the power supply module, the measurement data of the temperature-gas detection module, the environment parameters of the system expansion module and the like and the remote acquisition of adjustment signals; the remote on-line monitoring and early warning module 17 can remotely control the working states of the power supply module, the temperature-gas detection module and the system expansion module through the wireless communication module 16 and the control module 14, display the variation trend of the parameters including the gas concentration, the temperature and the like of the coal fire situation of the detection hole in real time, and alarm the gas concentration and the temperature exceeding the threshold value. The power supply module can realize continuous power supply to the temperature-gas detection module, the system expansion module, the control module 14 and the wireless communication module 16 under the field condition, and the temperature control part arranged in the temperature control storage battery part 2 can ensure that the temperature control storage battery part works normally in extremely hot and extremely cold weather.
In the temperature-gas detection module, the drilling temperature test part 4 based on the thermocouple technology can directly measure the drilling temperature, the dust removal part 5 can purify tiny dust particles in the gas to be detected to prevent the tiny dust particles from blocking the gas pipeline 7, the three-stage steam drying part 6 ensures that the gas is not influenced by steam in the gas test process, and the gas concentration test part 8 can realize the detection of the spontaneous combustion gas concentration of the coal to be detected.
In the system expansion module, the atmospheric pressure detection component 10, the ambient temperature detection component 11 and the ambient humidity detection component 12 can realize real-time monitoring of ambient parameters such as atmospheric pressure, temperature and humidity, and the like, the heating and radiating component 13 can adjust the temperature parameters inside the device under extreme conditions, so that the equipment is in an optimal working state, and the system functions can be further expanded according to the measured actual requirements.
The control module 14 may adjust the operating conditions of the power module, the temperature-gas detection module, and the system expansion module based on remote signals received via the wireless communication module 16.
The wireless communication module 16 can realize remote transmission of working data such as current and voltage information of the power supply module, detection data of the temperature-gas detection module, environmental parameters of the system expansion module and the like and remote acquisition of regulation signals by selecting a 2G/3G/4G network.
The remote on-line monitoring and early warning module 17 is constructed based on a Java platform and a MySQL database, can realize remote control of a power supply module, a temperature-gas detection module and a system expansion module through the wireless communication component 16 and the control module 14, can display the variation trend of parameters such as the concentration, the temperature and the like of the gas in the coal fire situation in real time, judge the coal fire development situation, store the parameters of the coal fire situation in real time, and alarm the gas concentration and the temperature exceeding the threshold value.
The gas concentration testing component 8 shown in fig. 2 comprises an infrared broadband light source I, a gas absorption tank II, an actively tunable multi-channel narrow-band optical filter III, a photoelectric detector IV and a signal processing element V. In the gas concentration test component, when an infrared spectrum emitted by a broadband infrared light source I passes through a gas absorption tank II which is filled with gas of spontaneous combustion components of coal to be tested, the light intensity corresponding to the detection wavelength of the fingerprint characteristic of the gas is attenuated due to the absorption effect of the gas, then the light intensity signals aiming at the detection wavelength and the reference wavelength of the gas can be obtained after the light intensity signals are subjected to optical filtering by an actively tunable multi-channel narrow-band optical filter III designed by the invention, and finally the spontaneous combustion gas concentration of the coal to be tested can be obtained by detecting and solving the light intensity signals by a photoelectric detector IV.
The infrared broadband light source I emits broadband infrared light in a middle infrared range in a pulse form, can continuously provide fingerprint characteristic detection wavelength and reference wavelength with specific pulse frequency for spontaneous combustion gas of coal to be detected, and the spontaneous combustion gas of the coal in the gas absorption tank II absorbs infrared wavelength which is the same as the vibration or rotation frequency of a molecular group of the gas to be detected, so that light intensity signals of the characteristic detection wavelength are attenuated, and light intensity signals of the reference wavelength are not influenced.
The gas pipeline 7 of the gas absorption tank II controls the air inlet temperature of the air flow by heating the heat radiating part 13, and the gas pressure in the gas absorption tank can be further controlled by adjusting the air flow speed in the gas pipeline and the gas absorption tank.
The active tunable multi-channel narrow-band optical filter III realizes multi-channel ultra-narrow band optical filtering based on a defect mode and guided mode resonance, can simultaneously acquire multi-component gas detection in a mid-infrared range and a reference multi-channel light intensity signal, and realizes detection of spontaneous combustion multi-component gas of coal such as CO, C 2H4 and the like on the basis of reducing the using quantity of the filter.
The active tunable multi-channel narrow-band optical filter III has active tunability, the filtering characteristics of the active tunable multi-channel narrow-band optical filter III can be actively tuned in a mode of controlling the phase state of the phase change material in the multi-channel narrow-band optical filter through electric stimulation, the acquisition of light intensity signals of one gas under two different detection and reference wavelengths is realized, further, the two detection concentrations of the spontaneous combustion gas concentration of the coal to be detected are remotely realized, the average value is obtained, and the accuracy of the detection result can be improved.
The photoelectric detector IV converts the received light intensity signals into current and voltage signals, and the phase-locked amplifier is used for carrying out phase-locked amplification on the electric signals, so that noise interference is weakened, and meanwhile weak signal changes are accurately detected.
The signal processing element V performs inversion calculation on the electric signals of the detected fingerprint characteristic detection wavelength and the reference wavelength based on the beer lambert law, and can obtain the measured value of the spontaneous combustion gas concentration of the coal to be detectedWherein I α、Iβ is the current response without the gas to be detected, R α、Rβ is the system correlation constant, C α、Cβ is the detector response coefficient, K is the gas flow temperature in the gas absorption tank, L is the gas absorption optical path, and the above parameters are constant for the gas detection module; u α、Uβ is the reference voltage and the detection voltage after phase-locked amplification, and the measurement concentration of the gas to be measured can be obtained according to the ratio of the two voltage parameters; when the concentration of the spontaneous combustion gas of the single-component coal is detected, the measured concentration is the true concentration/>, of the gas to be detectedWhen the concentration of the multi-component coal spontaneous combustion gas is detected, the measured concentration of each coal spontaneous combustion gas is subjected to cross interference analysis, so that the true concentration of each gas to be detected can be obtained.
By analyzing the cross interference of the infrared spectrum absorption between the multi-component coal spontaneous combustion gases, the precise concentration of the multi-component coal spontaneous combustion gases can be obtained at the same time. Resolving the electrical signals measured by the multi-component gas to obtain a concentration measurement value of the gas componentWherein C 1、C2、C3, etc. is the concentration measurement of the detection signal solution; k 12、k13、k21、k23、k31、k32 and the like are cross interference influence coefficients among gases to be detected, and are constant aiming at a certain gas detection module; the real concentration c 1、c2、c3 and the like of the gas to be detected of the spontaneous combustion of the multi-component coal can be obtained through solving a matrix equation.
The temperature compensation program and the pressure compensation program in the signal processing element V can further reduce the regulation compensation errors of the temperature and the pressure of the spontaneous combustion gas of the coal to be tested.
The single-component and multi-component coal spontaneous combustion gas detection will be described below in conjunction with the non-dispersive infrared gas detection process and the optical filter principle:
CO single-component gas detection: the invention relates to an active tunable multi-channel mid-infrared narrow-band optical filter designed based on defect modes and guided mode resonance, which is designed according to fingerprint characteristic detection wavelength of CO gas at 4670nm and reference wavelength at 3900 nm. After parameter optimization is carried out on an active tunable multi-channel narrow-band optical filter designed based on a phase change material, two excellent narrow-band transmission peaks can be obtained at the required detection wavelength and reference wavelength respectively; the phase change material is subjected to phase change through electric stimulation, and two narrow-band transmission peaks with excellent performance can be obtained in the frequency range of the characteristic detection wavelength and the reference wavelength of CO gas; the accuracy of the CO concentration detection result can be improved by detecting the CO concentration twice and calculating the average value.
The infrared broadband light source I emits broadband infrared spectrum containing CO gas fingerprint characteristic detection wavelength and reference wavelength, the spontaneous combustion gas of the coal to be detected enters the gas absorption tank according to a certain air flow speed and pressure according to the working state of the small-sized air pump after being subjected to temperature adjustment by the heating and radiating component in the air inlet pipeline, and the broadband infrared radiation emitted by the infrared light source is subjected to characteristic selective absorption; after filtering by the narrow-band optical filter designed by the invention, only optical signals at reference wavelength and characteristic detection wavelength are remained, the photoelectric detector converts the optical signals into a first electric signal U ref (reference signal) and a first electric signal U CO (detection signal), and the real concentration of CO gas is obtained for the first time after compensation and calculation by the signal processing elementThe filtering performance of the narrow-band optical filter is changed through electric stimulation, the detection wavelength and the reference wavelength after the filtering effect are respectively converted into a second electric signal U 'ref and a second electric signal U' CO, and the actual concentration of CO gas is obtained for the second time after compensation and calculationThe average value of the final CO gas detection concentration is Deltac CO＝(cCO+c'CO)/2.
C 2H4, detecting the CO bi-component gas: the invention designs an actively tunable multi-channel mid-infrared narrow-band optical filter based on a defect mode, and designs the multi-channel mid-infrared narrow-band optical filter according to fingerprint characteristic detection wavelengths at 3155nm and 4670nm and reference wavelengths at 3900nm of C 2H4 and CO gas respectively. After parameter optimization is carried out on a multi-channel narrow-band optical filter designed based on a phase change material, three excellent narrow-band transmission peaks can be obtained at the required detection wavelength and reference wavelength respectively; the phase change material is subjected to phase change through electric stimulation, and three narrow-band transmission peaks with excellent performance can be obtained in the frequency ranges of the characteristic detection wavelength and the reference wavelength of C 2H4 and CO gas; the accuracy of the detection results of the concentrations of the C 2H4 and the CO can be improved by detecting the concentrations of the C 2H4 and the CO twice and calculating the average value.
The infrared light source emits broadband infrared spectrums containing C 2H4 and CO gas fingerprint characteristic detection wavelengths and reference wavelengths, the spontaneous combustion gas of the coal to be detected enters the gas absorption tank according to a certain airflow speed after being subjected to temperature adjustment by the heating and radiating component, and characteristic selective absorption is carried out on broadband infrared radiation emitted by the infrared light source; after filtering by the narrow-band optical filter designed by the invention, only the optical signals at the reference wavelength and the characteristic detection wavelength are remained, and the photoelectric detector respectively converts the optical signals into a first electric signal U ref (reference signal) and a first electric signal U ref (reference signal)(C 2H4 detection signal) and U CO (CO detection signal), and respectively obtaining the measured concentration/>, of C 2H4 and CO gas after compensation and calculation by a signal processing elementThen, after analysis and solution of cross interference among gases, the true concentrations of the C 2H4 and the CO gases to be detected are obtained for the first time and are respectively/>C CO; the filtering performance of the narrow-band optical filter is changed through electric stimulation, and the detection wavelength and the reference wavelength after the filtering effect are respectively converted into second electric signals U' ref and/>U' CO, obtaining the true concentration of C 2H4 and the true concentration of CO gas respectively as/>, after compensation calculation and cross interference analysis between gases for the second timeThe average value of the final C 2H4 and CO gas detection concentrations is/>, respectivelyΔcCO＝(cCO+c'CO)/2。
Next, the operation of the summer and winter system will be described with reference to the operation of the entire system:
the working process in summer is as follows: opening a remote on-line monitoring early warning module 17, clicking an operation button, starting to supply power to the temperature-gas detection module from the storage battery 2 with temperature control, starting to work the drilling temperature test part 4 and the gas concentration test part 8, and directly obtaining drilling temperature data; the to-be-detected air flow in the observation hole firstly filters tiny particles through the dust removing component 5, meanwhile, the interference of water vapor on the detection of the concentration of the air is removed through the three-stage drying component 6, then the air enters the air concentration testing component 8 to carry out detection analysis on the air, and O 2、CO、C2H4 concentration data is obtained after about 2 minutes; and then the temperature-gas detection module transmits the acquired data such as gas concentration, drilling temperature, current and voltage of a power supply device, environmental parameters of the system expansion module and the like to the remote on-line monitoring and early warning module 17 through the wireless signal transmission component 16, and alarms the gas concentration and the temperature exceeding the threshold value. In order to prevent the device housing 9 from being too high in temperature to make the devices in the device not work normally and to prevent the battery 2 from being damaged due to the too high temperature, when the device housing 9 exceeds the set upper temperature limit, the heating and radiating part 13 starts to work to reduce the temperature to a normal level, so that the normal work of the whole system is ensured.
The working process in winter is as follows: opening a remote on-line monitoring early warning module 17, clicking an operation button, starting to supply power to the temperature-gas detection module from the storage battery 2 with temperature control, starting to work the drilling temperature test part 4 and the gas concentration test part 8, and directly obtaining drilling temperature data; the to-be-detected air flow in the observation hole firstly filters tiny particles through the dust removing component 5, meanwhile, the interference of water vapor on the detection of the gas concentration is eliminated through the three-stage drying component 6, then the air flow enters the gas concentration testing component 8 to detect and analyze the gas concentration, and O 2、CO、C2H4 concentration data is obtained after about 2 minutes; and then the temperature-gas detection module transmits the acquired data such as gas concentration, drilling temperature, current and voltage of a power supply device, environmental parameters of the system expansion module and the like to the remote on-line monitoring and early warning module 17 through the wireless signal transmission component 16, and alarms the gas concentration and the temperature exceeding the threshold value. The storage battery 2 with temperature control can heat the battery at the environment temperature lower than 0 ℃ to ensure the normal operation of the battery and prevent the condition of excessively fast power consumption caused by excessively low temperature; in order to prevent the device housing 9 from being too low in temperature to make the devices in the device not work normally, when the temperature of the device housing 9 is lower than the set lower temperature limit, the heating and radiating component 13 starts to work so as to raise the temperature to a normal level, thereby ensuring the normal work of the whole system.
While the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes may be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (7)
1. The system is characterized by comprising a power supply module, a temperature-gas detection module, a system expansion module, a control module, a wireless communication module and a remote online monitoring and early warning module; the power supply module is used for continuously supplying power to the temperature-gas detection module, the system expansion module, the control module and the wireless communication module under the extreme conditions of the field; wherein,
The temperature-gas detection module is used for detecting the concentration of CO and C 2H4 gas and the drilling temperature simultaneously; the temperature-gas detection module comprises a drilling temperature test part, a dust removal part, a three-stage steam drying part, a gas pipeline, a gas concentration test part and a device shell, wherein the drilling temperature test part is used for directly measuring the drilling temperature, the dust removal part is used for purifying tiny dust particles in gas to be detected so as to prevent the tiny dust particles from blocking the gas pipeline, the three-stage steam drying part is used for drying the gas to be detected so as to remove steam in the gas to be detected, and the gas concentration test part is used for detecting the concentration of the gas for judging the spontaneous combustion situation of coal;
the system expansion module is used for realizing real-time monitoring and temperature adjustment of the running environment of equipment in the device; the wireless communication module is used for realizing remote transmission of system detection data and receiving a feedback adjusting signal; the remote on-line monitoring and early warning module is used for realizing remote control of the power supply module, the temperature-gas detection module and the system expansion module through the wireless communication module and the control module, displaying the variation trend of parameters including the gas concentration, the temperature and the like of the coal fire situation of the drilling hole in real time, and alarming the gas concentration and the temperature exceeding the threshold value; the control module adjusts working states of the power supply module, the temperature-gas detection module and the system expansion module according to remote signals received by the wireless communication module;
The gas concentration testing component comprises an infrared broadband light source, a gas absorption tank, an actively tunable multi-channel narrow-band optical filter, a photoelectric detector and a signal processing element; the active tunable multichannel narrow-band optical filter is a multichannel ultra-narrow band optical filter realized based on a defect mode and guided mode resonance; the infrared broadband light source is used for emitting broadband infrared spectrums containing C 2H4, CO gas fingerprint characteristic detection wavelengths and reference wavelengths; the gas absorption tank is used for receiving the coal spontaneous combustion situation research gas after the temperature adjustment of the heating and radiating component through the air inlet pipeline, and carrying out characteristic selective absorption on the broadband infrared spectrum emitted by the infrared broadband light source; the photoelectric detector is used for converting the received light intensity signals into first electric signals U ref and U CO, Performing phase-locked amplification on the first electric signal through a phase-locked amplifier;
The signal processing element is used for performing compensation calculation on the first electric signal to obtain the measured concentration of CO gas Obtaining measured concentration of C 2H4 gas/>The real concentration C CO,/>, of CO and C 2H4 gas can be obtained for the first time after the analysis of the cross interference among the gases
The actively tunable multi-channel narrow-band optical filter changes the filtering performance through electric stimulation, and converts the detection wavelength and the reference wavelength after the filtering effect into second electric signals U 'ref and U' CO respectively through the photoelectric detector,Performing compensation calculation to obtain the measured concentration/>, of CO gasObtaining measured concentration of C 2H4 gasThe real concentration C' CO of CO and C 2H4 gas can be obtained for the second time after the analysis of the cross interference among the gases,Thereby obtaining the final detection concentration delta C CO＝(cCO+c'CO)/2 of the CO gas and the final detection concentration of the C 2H4 gas
2. The remote on-line detection and early warning system for the temperature and the gas in the fire area of the coal field according to claim 1, wherein the power supply module comprises an external power generation component and a temperature control storage battery component, and a temperature control device is arranged in the temperature control storage battery component and is used for realizing temperature control so as to ensure normal operation in extremely hot and extremely cold weather.
3. The system for remote on-line detection and early warning of temperature and gas in a coal field fire zone according to claim 1, wherein the system expansion module comprises an atmospheric pressure detection component, an ambient temperature detection component, an ambient humidity detection component and a heating and radiating component; the atmospheric pressure detection component is used for monitoring the atmospheric pressure, the environment temperature detection component is used for monitoring the environment temperature, the environment humidity detection component is used for monitoring the environment humidity, and the heating radiating component is used for adjusting the temperature parameter inside the device under extreme conditions; the heating radiating component is used for controlling the air inlet temperature of the air flow, and further controlling the air pressure in the air absorption tank by adjusting the air flow speed in the air pipeline and the air absorption tank.
4. The system for remote on-line detection and early warning of temperature and gas in a coal field according to claim 1, wherein the signal processing element performs inversion calculation on the detected electric signals of the fingerprint feature detection wavelength and the reference wavelength based on the beer lambert law to obtain a measured value of the concentration of the spontaneous combustion gas of the coal to be measured, and the calculation formula is as follows:
Wherein I α、Iβ is the current response without the gas to be detected, R α、Rβ is the system related constant, C α、Cβ is the detector response coefficient, K is the gas flow temperature in the gas absorption tank, L is the gas absorption optical path, and the parameters are constant for the gas detection module; u α、Uβ is the reference voltage and the detection voltage after phase-locked amplification, and the measurement concentration of the gas to be measured can be obtained according to the ratio of the two voltage parameters; when the concentration of the spontaneous combustion gas of the single-component coal is detected, the measured concentration is the true concentration of the gas to be detected When the concentration of the multi-component coal spontaneous combustion gas is detected, the measured concentration of each coal spontaneous combustion gas is subjected to cross interference analysis, so that the true concentration of each gas to be detected can be obtained.
5. The system for remote on-line detection and early warning of coal field fire zone temperature-gas according to claim 1, wherein the actively tunable multi-channel narrow-band optical filter actively tunes its filtering characteristics by controlling the phase state of the phase change material in the multi-channel narrow-band optical filter by means of electrical stimulation.
6. The system for remote on-line detection and early warning of temperature and gas in a coal field fire area according to claim 1, wherein the wireless communication module is a 2G/3G/4G network.
7. The system for remote online detection and early warning of temperature and gas in a coal field fire area according to claim 1, wherein the remote online detection and early warning module is constructed based on a Java platform and a MySQL database.
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