Online monitoring system for underground air quality based on multi-sensor fusion

Abstract

The present invention discloses an underground air quality monitoring system based on multi-sensor fusion, which relates to the technical field of air quality monitoring and early warning. The system includes a data acquisition module, an underground monitoring substation, a ring network switch, a control center and an execution module. The design of the data acquisition module can ensure that it is adapted to local conditions and varies from area to area. Different module combinations are adopted in different areas underground to achieve full coverage of the underground cavity. The ring network switch design enables all data acquisition modules and underground detection substations in the underground area to form an underground monitoring and early warning matrix, realizing the transmission and control communication of massive data from underground sensors. Then, through the centralized control and judgment of the data by the control center, it is possible to query the main cause of poor underground air quality, and make changes by sending signal instructions to the execution module, thereby realizing the function of real-time monitoring of underground air quality and improving air quality.

Description

Technical Field

[0001] The present invention belongs to the technical field of air quality monitoring and early warning, and in particular relates to an underground air quality online monitoring system based on multi-sensor fusion. Background Art

[0002] Since my country is a major mineral country, and underground mines are the main forms of air quality environment in my country's mineral production, exhaust emissions from underground vehicles, and the accumulation of toxic and harmful gases due to small spaces and poor ventilation. Due to the special environment of underground mines, the underground situation is very complicated. For example, the humidity increase caused by roof leakage cannot be effectively controlled and monitored. How to make underground personnel work in a comfortable environment has become a problem that needs to be solved in today's work. For this reason, an underground air quality online monitoring system based on multi-sensor fusion is proposed. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide an online monitoring system for underground air quality based on multi-sensor fusion, which solves the technical problems in the existing technology that the underground air quality is not good enough, resulting in poor underground air quality and ultimately leading to accidents such as gas, poisoning and suffocation.

[0004] The object of the present invention can be achieved through the following technical solution: an underground air quality monitoring system based on multi-sensor fusion, comprising a data acquisition module, an underground monitoring substation, a ring network switch, a control center and an execution module, wherein the data acquisition module is used to collect underground ambient air quality data and send the collected ambient air quality data to the underground monitoring substation;

[0005] After receiving the ambient air quality data sent by the data acquisition module, the underground monitoring substation verifies the ambient air quality data sent by the data acquisition module according to the corresponding communication protocol, and sends the received ambient air quality data to the liquid crystal display for display, showing the data of all sensors within the working range of the station;

[0006] The ring network switch is used to build an industrial ring network to provide communication support for the control center and the underground monitoring substation;

[0007] The control center is used to centrally control and determine the data transmitted by the underground monitoring substation through the ring network switch, and obtain a first ambient air quality coefficient, a second ambient air quality coefficient, a third ambient air quality coefficient, a fourth ambient air quality coefficient, and a fifth ambient air quality coefficient by marking and calculating the received data, and make a judgment, set a first ambient air quality coefficient threshold, a second ambient air quality coefficient threshold, a third ambient air quality coefficient threshold, a fourth ambient air quality coefficient threshold, and a fifth ambient air quality coefficient threshold, and then obtain a first ambient air quality impact score, a second ambient air quality impact score, a third ambient air quality impact score, a fourth ambient air quality impact score, and a fifth ambient air quality impact score by calculation, and then prioritize the five ambient air quality impact scores;

[0008] If the first ambient air quality impact score has the highest priority, the control center sends a signal to reduce air concentration to the execution module; if the second ambient air quality impact score has the highest priority, the control center sends a signal to adjust temperature to the execution module; if the third ambient air quality impact score has the highest priority, the control center sends a signal to adjust humidity to the execution module; if the fourth ambient air quality impact score has the highest priority, the control center sends a signal to reduce noise to the execution module; if the fifth ambient air quality impact score has the highest priority, the control center sends a signal to adjust wind speed to the execution module;

[0009] After receiving the control signal sent by the control center, the execution module performs corresponding execution adjustments according to the control signal.

[0010] Furthermore, the underground environmental air quality data includes various gas concentration parameters generated in the underground working environment, temperature data in the working environment, humidity data in the working environment, noise data in the working environment and wind speed in the working environment.

[0011] Furthermore, the concentrations of the various gases include: nitrogen oxides, carbon oxides, hydrocarbons, oxygen and dust.

[0012] Furthermore, the data acquisition module includes a parameter acquisition unit, a data analysis unit, a data display unit, a button control unit, a communication unit and an audible and visual alarm unit.

[0013] Furthermore, the downhole monitoring substation includes a serial port to network port unit and a photoelectric conversion unit. The serial port to network port unit is used to convert serial port data into network port data, and the photoelectric conversion unit is used to convert received network port data into optical signals or electrical signals.

[0014] Furthermore, the ring network switch includes an optoelectronic conversion node, and the optoelectronic conversion node is used to convert optical signals and electrical signals into each other.

[0015] Furthermore, the process of the control center performing centralized control and judgment on the received data includes the following steps: marking the concentration parameters of various gases generated in the underground working environment as Q i , mark the temperature data in the working environment as T i , mark the humidity data in the working environment as S i , mark the noise data in the working environment as D i , mark the wind speed in the working environment as Z i , where i is the number of acquisition times, and i=1, 2, 3, ..., n, and n is the total number of acquisition times;

[0016] By formula The first ambient air quality coefficient G1 is calculated, where T0 is the standard temperature coefficient, S0 is the standard humidity coefficient, D0 is the standard noise coefficient, Z0 is the standard wind speed coefficient, Q0 is the standard gas concentration, α is the gas concentration influence coefficient, and β is the gas type;

[0017] By formula The second ambient air quality coefficient G2 is calculated, where a is the temperature influence coefficient;

[0018] By formula The third ambient air quality coefficient G3 is calculated, where b is the humidity influence coefficient;

[0019] By formula The fourth ambient air quality coefficient G4 is calculated, where c is the noise impact coefficient;

[0020] By formula The fifth ambient air quality coefficient G5 is calculated, where d is the wind speed influence coefficient.

[0021] Furthermore, the first ambient air quality coefficient G1, the second ambient air quality coefficient G2, the third ambient air quality coefficient G3, the fourth ambient air quality coefficient G4 and the fifth ambient air quality coefficient G5 are determined, and the process includes:

[0022] Set the first ambient air quality coefficient threshold to G 01 , the second ambient air quality coefficient threshold is G 02 , the third ambient air quality coefficient threshold is G 03 , the fourth ambient air quality coefficient threshold is G 04 , the fifth ambient air quality coefficient threshold is G 05 ;

[0023] By formula Calculate the first ambient air quality impact score Yx1 , where f is the second influence coefficient, g is the third influence coefficient, h is the fourth influence coefficient, and j is the fifth influence coefficient;

[0024] By formula Calculate the second ambient air quality impact score Y x2 , where e is the first influence coefficient;

[0025] By formula Calculate the third ambient air quality impact score Y x3 ;

[0026] By formula Calculate the fourth ambient air quality impact score Y x4 ;

[0027] By formula Calculate the fifth ambient air quality impact score Y x5 ;

[0028] The first ambient air quality impact score Y x1 , Second ambient air quality impact score Y x2 , Third environmental air quality impact score Y x3 , Fourth ambient air quality impact score Y x4 and the fifth ambient air quality impact score Y x5 Prioritize;

[0029] If the ranking result is the first ambient air quality impact score Y x1 The priority is the highest, which means that the first ambient air quality impact score has the greatest impact on the underground air quality, and the control center sends a signal to reduce the air concentration to the execution module;

[0030] If the ranking result is the second ambient air quality impact score Y x2 The priority is the highest, which means that the second ambient air quality impact score has the greatest impact on the underground air quality. The control center sends a temperature adjustment signal to the execution module;

[0031] If the ranking result is the third ambient air quality impact score Y x3 The highest priority indicates that the third ambient air quality impact score has the greatest impact on the underground air quality, and the control center sends a humidity adjustment signal to the execution module;

[0032] If the ranking result is the fourth ambient air quality impact score Y x4 The fourth environmental air quality impact score has the highest priority, which means that the fourth environmental air quality impact score has the greatest impact on the underground air quality. The control center sends a noise reduction signal to the execution module;

[0033] If the ranking result is the fifth ambient air quality impact score Y x5 The priority is the highest, which means that the fifth environmental air quality impact score has the greatest impact on the underground air quality. The control center sends a wind speed adjustment signal to the execution module.

[0034] Furthermore, the control center also has the functions of data display, data storage, data analysis, data query, equipment inspection, authority management, and early warning plan issuance.

[0035] Furthermore, the communication unit mainly uses the RS485 bus serial port to send and receive signals.

[0036] Furthermore, the button control unit setting functions include address setting, alarm value setting, and zero point calibration functions.

[0037] Beneficial effects of the present invention:

[0038] During use, the present invention includes a data acquisition module, an underground monitoring substation, a ring network switch, a control center and an execution module. The design of the data acquisition module can ensure that it is adapted to local conditions and varies from area to area. Different module combinations are adopted in different areas underground to achieve full coverage of the underground cavity. The ring network switch design enables all data acquisition modules and underground detection substations in the underground area to form an underground monitoring and early warning matrix, realizing the transmission and control communication of massive data from underground sensors, and then through the centralized control and judgment of the data by the control center, it is possible to query the main reasons for the poor underground air quality, and make changes by sending signal instructions to the execution module, thereby realizing the function of real-time monitoring of the underground air quality and improving the air quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0040] Figure 1 It is a schematic diagram of the principle of the present invention. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] like Figure 1 As shown, the underground air quality online monitoring system based on multi-sensor fusion includes a data acquisition module, an underground monitoring substation, a ring network switch, a control center and an execution module. The data acquisition module is used to collect underground ambient air quality data and send the collected ambient air quality data to the underground monitoring substation;

[0043] It should be further explained that, in a specific implementation process, the underground environmental air quality data includes various gas concentration parameters generated in the underground working environment, temperature data in the working environment, humidity data in the working environment, noise data in the working environment, and wind speed in the working environment;

[0044] It should be further explained that, in the specific implementation process, the data acquisition module includes specific sensors selected for monitoring different underground air quality environments, including: gas sensors such as nitrogen oxides, carbon oxides, and gas; environmental sensors for wind speed;

[0045] The data acquisition module includes a parameter acquisition unit, a data analysis unit, a data display unit, a button control unit, a communication unit and an audible and visual alarm unit. The parameter acquisition unit collects different parameters through different sensors and sends the collected parameters to the data analysis unit for analysis. The data analysis unit analyzes and processes the parameters and then sends the analyzed parameters to the downhole monitoring substation through the communication unit.

[0046] The data display unit is used to project the data collected by the parameter acquisition unit onto the LCD screen, which is designed to facilitate real-time observation by staff;

[0047] The button control unit is used to set the data acquisition module. It should be further explained that in the specific implementation process, the setting functions include address setting, alarm value setting, and zero point calibration function;

[0048] The communication unit mainly uses RS485 bus serial port to send and receive signals;

[0049] The sound and light alarm unit gives an alarm prompt through sound and light;

[0050] The underground monitoring substation adopts a serial bus form, which can collect parameters sent by the monitoring data acquisition module, verify the parameters sent by the data acquisition module according to the corresponding communication protocol, and send the received parameters to the liquid crystal display for display. The data of all sensors within the working range of the station can be displayed on the substation;

[0051] The underground monitoring substation includes a serial port to network port unit and a photoelectric conversion unit. The serial port to network port unit is used to convert serial port data into network port data. It needs to be further explained that in the specific implementation process, this design is to establish a connection with the ring network switch and send the network port data to the photoelectric conversion unit; the photoelectric conversion unit is used to convert the received network port data into an optical signal or an electrical signal, so as to establish communication with the ring network switch.

[0052] The ring network switch is used to build an industrial ring network to provide communication support for the control center and the underground monitoring substation. It should be further explained that in the specific implementation process, the ring network switch includes an optoelectronic conversion node, which is used to convert optical signals and electrical signals into each other;

[0053] The control center is used to centrally control and determine the data transmitted by the underground monitoring substation through the ring network switch;

[0054] It should be further explained that, in the specific implementation process, the control center can complete functions such as data monitoring, historical query, early warning management, equipment management, business reporting, etc., and has a built-in inspection function. Within one inspection cycle, it can automatically inspect the working status and real-time data of all substations and sensor nodes;

[0055] The process of the control center performing centralized control and judgment on the received data includes the following steps:

[0056] The concentration parameters of various gases generated in the underground working environment are marked as Q i , mark the temperature data in the working environment as T i , mark the humidity data in the working environment as S i , mark the noise data in the working environment as D i , mark the wind speed in the working environment as Z i , where i is the number of acquisition times, and i=1, 2, 3, ..., n, and n is the total number of acquisition times;

[0057] By formula The first ambient air quality coefficient G1 is calculated, where T0 is the standard temperature coefficient, S0 is the standard humidity coefficient, D0 is the standard noise coefficient, Z0 is the standard wind speed coefficient, Q0 is the standard gas concentration, α is the gas concentration influence coefficient, and β is the gas type;

[0058] It should be further explained that, in the specific implementation process, the gas types β are divided according to the impact of the gas on the environment;

[0059] By formula The second ambient air quality coefficient G2 is calculated, where a is the temperature influence coefficient;

[0060] By formula The third ambient air quality coefficient G3 is calculated, where b is the humidity influence coefficient;

[0061] By formula The fourth ambient air quality coefficient G4 is calculated, where c is the noise impact coefficient;

[0062] By formula The fifth ambient air quality coefficient G5 is calculated, where d is the wind speed influence coefficient;

[0063] The first ambient air quality coefficient G1, the second ambient air quality coefficient G2, the third ambient air quality coefficient G3, the fourth ambient air quality coefficient G4 and the fifth ambient air quality coefficient G5 are determined, and the process includes:

[0064] Set the first ambient air quality coefficient threshold to G 01 , the second ambient air quality coefficient threshold is G 02 , the third ambient air quality coefficient threshold is G 03 , the fourth ambient air quality coefficient threshold is G 04 , the fifth ambient air quality coefficient threshold is G 05 ;

[0065] By formula Calculate the first ambient air quality impact score Y x1 , where f is the second influence coefficient, g is the third influence coefficient, h is the fourth influence coefficient, and j is the fifth influence coefficient;

[0066] By formula Calculate the second ambient air quality impact score Y x2 , where e is the first influence coefficient;

[0067] By formula Calculate the third ambient air quality impact score Y x3 ;

[0068] By formula Calculate the fourth ambient air quality impact score Y x4 ;

[0069] By formula Calculate the fifth ambient air quality impact score Y x5 ;

[0070] The first ambient air quality impact score Y x1 , Second ambient air quality impact score Yx2 , Third environmental air quality impact score Y x3 , Fourth ambient air quality impact score Y x4 and the fifth ambient air quality impact score Y x5 Prioritize;

[0071] If the ranking result is the first ambient air quality impact score Y x1 The first environmental air quality impact score has the highest priority, which means that the first environmental air quality impact score has the greatest impact on the underground air quality. In this case, the air concentration in the underground needs to be reduced. The control center sends a signal to reduce the air concentration to the execution module, and the execution module reduces the air concentration to improve the air quality.

[0072] If the ranking result is the second ambient air quality impact score Y x2 The highest priority indicates that the second ambient air quality impact score has the greatest impact on the underground air quality, and the underground temperature needs to be adjusted. The control center sends a temperature adjustment signal to the execution module, and the execution module adjusts the temperature.

[0073] If the ranking result is the third ambient air quality impact score Y x3 The highest priority indicates that the third ambient air quality impact score has the greatest impact on the underground air quality, and the humidity in the well needs to be adjusted. The control center sends a humidity adjustment signal to the execution module, and the execution module adjusts the humidity.

[0074] If the ranking result is the fourth ambient air quality impact score Y x4 The fourth environmental air quality impact score has the highest priority, which means that the fourth environmental air quality impact score has the greatest impact on the underground air quality. The noise in the underground needs to be reduced. The control center sends a noise reduction signal to the execution module, and the execution module reduces the noise.

[0075] If the ranking result is the fifth ambient air quality impact score Y x5 The fifth environmental air quality impact score has the highest priority, which means that the fifth environmental air quality impact score has the greatest impact on the underground air quality, and the wind speed underground needs to be adjusted. The control center sends a wind speed adjustment signal to the execution module, and the execution module adjusts the wind speed.

[0076] After receiving the control signal sent by the control center, the execution module sends the corresponding control signal to the mine safety supervisor for regulation.

[0077] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0078] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. The underground air quality online monitoring system based on multi-sensor fusion is characterized by: It includes a data acquisition module, an underground monitoring substation, a ring network switch, a control center and an execution module. The data acquisition module is used to collect underground ambient air quality data and send the collected ambient air quality data to the underground monitoring substation; After receiving the ambient air quality data sent by the data acquisition module, the underground monitoring substation verifies the ambient air quality data sent by the data acquisition module according to the corresponding communication protocol, and sends the received ambient air quality data to the liquid crystal display for display, showing the data of all sensors within the working range of the station; The ring network switch is used to build an industrial ring network to provide communication support for the control center and the underground monitoring substation; The control center is used to centrally control and determine the data transmitted by the underground monitoring substation through the ring network switch, and obtain a first ambient air quality coefficient, a second ambient air quality coefficient, a third ambient air quality coefficient, a fourth ambient air quality coefficient, and a fifth ambient air quality coefficient by marking and calculating the received data, and make a judgment, set a first ambient air quality coefficient threshold, a second ambient air quality coefficient threshold, a third ambient air quality coefficient threshold, a fourth ambient air quality coefficient threshold, and a fifth ambient air quality coefficient threshold, and then obtain a first ambient air quality impact score, a second ambient air quality impact score, a third ambient air quality impact score, a fourth ambient air quality impact score, and a fifth ambient air quality impact score by calculation, and then prioritize the five ambient air quality impact scores; If the first ambient air quality impact score has the highest priority, the control center sends a signal to reduce air concentration to the execution module; if the second ambient air quality impact score has the highest priority, the control center sends a signal to adjust temperature to the execution module; if the third ambient air quality impact score has the highest priority, the control center sends a signal to adjust humidity to the execution module; if the fourth ambient air quality impact score has the highest priority, the control center sends a signal to reduce noise to the execution module; if the fifth ambient air quality impact score has the highest priority, the control center sends a signal to adjust wind speed to the execution module; The process of the control center performing centralized control and judgment on the received data includes the following steps: marking the concentration parameters of various gases generated in the underground working environment as Q i , mark the temperature data in the working environment as T i , mark the humidity data in the working environment as S i , mark the noise data in the working environment as D i , mark the wind speed in the working environment as Z i , where i is the number of acquisition times, and i=1, 2, 3, ..., n, and n is the total number of acquisition times; By formula The first ambient air quality coefficient G1 is calculated, where T0 is the standard temperature coefficient, S0 is the standard humidity coefficient, D0 is the standard noise coefficient, Z0 is the standard wind speed coefficient, Q0 is the standard gas concentration, α is the gas concentration influence coefficient, and β is the gas type; By formula The second ambient air quality coefficient G2 is calculated, where a is the temperature influence coefficient; By formula The third ambient air quality coefficient G3 is calculated, where b is the humidity influence coefficient; By formula The fourth ambient air quality coefficient G4 is calculated, where c is the noise impact coefficient; By formula The fifth ambient air quality coefficient G5 is calculated, where d is the wind speed influence coefficient; The first ambient air quality coefficient G1, the second ambient air quality coefficient G2, the third ambient air quality coefficient G3, the fourth ambient air quality coefficient G4 and the fifth ambient air quality coefficient G5 are determined, and the process includes: Set the first ambient air quality coefficient threshold to G 01 , the second ambient air quality coefficient threshold is G 02 , the third ambient air quality coefficient threshold is G 03 , the fourth ambient air quality coefficient threshold is G 04 , the fifth ambient air quality coefficient threshold is G 05 ; By formula Calculate the first ambient air quality impact score Y x1 , where f is the second influence coefficient, g is the third influence coefficient, h is the fourth influence coefficient, and j is the fifth influence coefficient; By formula Calculate the second ambient air quality impact score Y x2 , where e is the first influence coefficient; By formula Calculate the third ambient air quality impact score Y x3 ; By formula Calculate the fourth ambient air quality impact score Y x4 ; By formula Calculate the fifth ambient air quality impact score Y x5 ; The first ambient air quality impact score Y x1 , Second ambient air quality impact score Y x2 , Third environmental air quality impact score Y x3 , Fourth ambient air quality impact score Y x4 and the fifth ambient air quality impact score Y x5 Prioritize; If the ranking result is the first ambient air quality impact score Y x1 The priority is the highest, which means that the first ambient air quality impact score has the greatest impact on the underground air quality, and the control center sends a signal to reduce the air concentration to the execution module; If the ranking result is the second ambient air quality impact score Y x2 The priority is the highest, which means that the second ambient air quality impact score has the greatest impact on the underground air quality. The control center sends a temperature adjustment signal to the execution module; If the ranking result is the third ambient air quality impact score Y x3 The highest priority indicates that the third ambient air quality impact score has the greatest impact on the underground air quality, and the control center sends a humidity adjustment signal to the execution module; If the ranking result is the fourth ambient air quality impact score Y x4 The fourth environmental air quality impact score has the highest priority, which means that the fourth environmental air quality impact score has the greatest impact on the underground air quality. The control center sends a noise reduction signal to the execution module; If the ranking result is the fifth ambient air quality impact score Y x5 The fifth environmental air quality impact score has the highest priority, which means that the fifth environmental air quality impact score has the greatest impact on the underground air quality. The control center sends a wind speed adjustment signal to the execution module; After receiving the control signal sent by the control center, the execution module performs corresponding execution adjustments according to the control signal.

2. The underground air quality online monitoring system based on multi-sensor fusion according to claim 1 is characterized in that: The underground environmental air quality data includes various gas concentration parameters generated in the underground working environment, temperature data in the working environment, humidity data in the working environment, noise data in the working environment and wind speed in the working environment.

3. The underground air quality online monitoring system based on multi-sensor fusion according to claim 2 is characterized in that: The concentrations of various gases include nitrogen oxides, carbon oxides, hydrocarbons, oxygen and dust.

4. The underground air quality online monitoring system based on multi-sensor fusion according to claim 1 is characterized in that: The data acquisition module includes a parameter acquisition unit, a data analysis unit, a data display unit, a key control unit, a communication unit and an audible and visual alarm unit.

5. The underground air quality online monitoring system based on multi-sensor fusion according to claim 1 is characterized in that: The downhole monitoring substation includes a serial port to network port unit and a photoelectric conversion unit. The serial port to network port unit is used to convert serial port data into network port data, and the photoelectric conversion unit is used to convert received network port data into optical signals or electrical signals.

6. The underground air quality online monitoring system based on multi-sensor fusion according to claim 1 is characterized in that: The ring network switch includes an optoelectronic conversion node, which is used to convert optical signals and electrical signals into each other.

7. The underground air quality online monitoring system based on multi-sensor fusion according to claim 1 is characterized in that: The control center also has the functions of data display, data storage, data analysis, data query, equipment inspection, authority management, and early warning plan issuance.

8. The underground air quality online monitoring system based on multi-sensor fusion according to claim 4 is characterized in that: The communication unit mainly uses the RS485 bus serial port to send and receive signals.

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