CN111350546A - Coal mine gas monitoring system - Google Patents
Coal mine gas monitoring system Download PDFInfo
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- CN111350546A CN111350546A CN202010087335.7A CN202010087335A CN111350546A CN 111350546 A CN111350546 A CN 111350546A CN 202010087335 A CN202010087335 A CN 202010087335A CN 111350546 A CN111350546 A CN 111350546A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 72
- 239000003245 coal Substances 0.000 title claims abstract description 34
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- 239000013307 optical fiber Substances 0.000 claims abstract description 5
- 238000004891 communication Methods 0.000 claims description 31
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000013500 data storage Methods 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 claims description 4
- 230000003993 interaction Effects 0.000 claims description 3
- 238000007726 management method Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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- 238000004220 aggregation Methods 0.000 description 1
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- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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Abstract
The invention discloses a coal mine gas monitoring system which mainly comprises a monitoring node, a concentrator, a gateway and a monitoring platform. The monitoring node takes STM32F103C8T6 as a main control processor, and uses MQ-5 gas sensor as a gas concentration acquisition device, and necessary power supply circuit, clock circuit, reset circuit, acousto-optic alarm circuit and the like; when the collected gas concentration is higher than a preset threshold value, performing acousto-optic alarm, and transmitting information to the concentrator through Lora; the concentrator also adopts STM32F103C8T6 as a main control processor, and the concentrator mainly collects and processes signals, communicates the summarized information with a downhole optical fiber backbone network through an Ethernet control module and transmits the information to a monitoring center through a switch along a light backbone network. The LoRa network provided by the invention can improve the safety of underground coal mine operation and reduce the cost to a great extent.
Description
Technical Field
The invention belongs to the field of coal mine safety monitoring, and particularly relates to a coal mine gas monitoring system.
Background
The coal mine industry is a traditional industry in China and also an important source of income of the nation. In actual production, safety accidents occur, wherein the cases of personnel and property loss caused by gas explosion are countless, and one of the important reasons of the gas explosion is that the gas concentration exceeds the standard. When the gas concentration reaches 5% -16%, the gas is rapidly oxidized after being mixed with air, extremely strong shock waves are generated by explosion, a large amount of carbon monoxide and carbon dioxide are generated, great threat is generated to the life of underground workers, and therefore the monitoring of the gas concentration is very important. Traditional gas monitoring system in pit arranges with wired more, and the communication distribution line is complicated, and intensity of labour is big. With the change of coal mining day by day, the underground deployed wired monitoring system is difficult to meet the mining requirement, so that coal mine safety detection based on the wireless sensing technology is urgent. With the invention and innovation of the internet of things, computers and wireless communication technologies, a concentration detection technology for real-time data acquisition by using a Supervisory control and data acquisition (SCADA) system is gradually developed into a mainstream technology for gas concentration detection.
The LoRa wireless communication technology is a typical representative of a Low-power wide-Area Network (LPWAN) technology, can be remotely transmitted, can reach thousands of meters in distance, can be Low in power consumption, is a novel multi-node Internet of things radio modulation and demodulation communication technology, has the characteristics of wide coverage range, Low power consumption, Low cost and the like, is suitable for battery-powered remote Internet of things equipment with small data volume transmission, and is very suitable for being applied to underground coal mine monitoring.
The system realizes interconnection between the monitoring platform and the gas concentration sensor in a network transmission mode combining LoRa wireless communication and Ethernet, carries out real-time monitoring on the gas concentration of a coal mine, and has great significance for reducing safety accidents.
Disclosure of Invention
The invention aims to provide a coal mine gas monitoring system, which utilizes the advanced technologies of a low-power consumption control chip, a high-precision sensor, a low-power consumption wireless communication network and the like to realize the real-time monitoring of the gas concentration, has the advantages of wireless transmission, low power consumption, high reliability and remote real-time checking, and can solve the problems of complex construction, large energy consumption, uneconomic performance and the like of a wired network in the traditional coal mine gas monitoring.
The purpose of the invention can be realized by the following technical scheme:
a coal mine gas monitoring system mainly comprises monitoring nodes, a concentrator, an exchanger and an upper computer of a ground monitoring center. In the working process, the monitoring node collects and processes the gas concentration, then transmits the data to the concentrator through the LoRa wireless module, and automatically gives an audible and visual alarm if the collected concentration is higher than a set value; the concentrator realizes the data concentration and processing of the monitoring nodes, performs data communication with the switch through a wired network, and then uploads information to an upper computer of a ground monitoring center; and the upper computer of the ground monitoring center is provided with a monitoring platform, receives and displays data and feeds back the data to related personnel in time so as to rapidly process problems.
Furthermore, the monitoring node of the coal mine gas monitoring system is composed of a main control chip, a LoRa wireless communication module, a gas concentration sensor, a power supply module, a clock circuit, a reset circuit and a JTAG interface, the gas concentration is collected and processed, and the LoRa wireless communication module is used for wireless transmission.
Further, the main control chip of the monitoring node adopts STM32F103C8T6, the LoRa wireless communication module adopts an SX1278 radio frequency chip, and the gas concentration sensor adopts an MQ-5 gas sensor. SX1278 is a LoRa radio frequency chip produced by Semtech corporation, and has the advantages of long distance, low power consumption, low cost, high sensitivity, strong anti-interference capability and the like. The LoRa module is connected with the STM32F103C8T6 through a serial port, and data can be well transmitted under a coal mine.
Furthermore, the concentrator of the coal mine gas monitoring system is composed of a main control chip, a LoRa wireless communication module, an Ethernet control module, a power supply module, a clock circuit, a reset circuit and a JTAG interface, mainly plays roles of data aggregation and communication protocol conversion, aggregates data of monitoring nodes in one area, performs fusion processing, is accessed into a coal mine underground backbone network through the Ethernet control module, and is transmitted to a ground monitoring center through the Ethernet.
Furthermore, the main control chip of the concentrator adopts STM32F103C8T6, the LoRa wireless communication module adopts SX1278, and the ethernet control module adopts W5200 chip.
Furthermore, a monitoring platform is installed on a ground monitoring center upper computer of the coal mine gas monitoring system, and functions of monitoring node management, real-time data display, historical data query, data storage, alarm information prompt, alarm parameter setting and the like are achieved.
Further, the coal mine gas monitoring system adopts a compressed sensing algorithm to solve the problems of large information transmission quantity and large node energy consumption.
The invention has the beneficial effects that:
(1) convenient to install
The monitoring nodes are convenient to install, the monitoring nodes are only required to be provided with batteries and then are arranged in the branch roadway and the main roadway, one monitoring node is arranged at a distance, the junction of the branch roadway is provided with the concentrator, and the concentrator is connected into the underground optical fiber ring network.
(2) Long wireless communication distance
By adopting the wireless communication technology of LoRa, the wireless communication distance can reach thousands of meters, and only one concentrator needs to be arranged at the road junction of the branch road.
(3) Convenient to use
Except for an upper computer of the ground monitoring center, a user can remotely log in a monitoring platform to inquire the underground gas concentration information of the coal mine in real time, and the alarm information is displayed on the platform and is sent in a short message mode, so that the system is simple and easy to use.
(4) Low power consumption and strong reliability
The monitoring nodes and the main control chip of the concentrator both adopt a low-power-consumption microprocessor STM32F103C8T6 with strong anti-interference performance, and the wireless communication chip is also a low-power-consumption module.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of the overall architecture of the system of the present invention;
FIG. 2 is a block diagram of the inventive monitoring node;
FIG. 3 is a concentrator composition block diagram of the present invention;
FIG. 4 is a schematic diagram of the compressed sensing algorithm of the present invention;
FIG. 5 is a functional block diagram of the monitoring platform of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a coal mine gas monitoring system includes a monitoring node 1, a concentrator 2, an exchanger 3 and an upper computer 4 of a ground monitoring center.
A gas concentration monitoring node 1 is arranged in a coal mine underground roadway and a main roadway at a certain distance, a concentrator 2 is arranged at a branch roadway crossing, an exchanger 3 is arranged at an underground outlet, and an upper computer 4 is installed in a ground monitoring center.
In the working process, the monitoring node 1 acquires gas concentration information in a roadway, uploads the data to the concentrator 2 through the wireless communication module, and meanwhile, if the gas concentration exceeds the standard, local alarm is carried out; a concentrator 2 is arranged at the junction of a branch roadway, the concentrator 2 gathers data of related monitoring nodes 1 in the branch roadway and a nearby main roadway through a wireless communication module, and meanwhile, the data are connected with an underground optical fiber backbone network through an Ethernet control module, upload information and transmit the information to a ground monitoring center through a switch 3; and the upper computer 4 of the ground monitoring center is provided with a monitoring platform, a man-machine interaction plane is provided, and information collected in real time is fed back to the working personnel.
As shown in fig. 2, the monitoring node 1 is composed of an STM32F103C8T6 main control chip, an MQ-5 sensor, a power supply module, a clock circuit, a reset circuit and an LoRa communication module, the power supply module, the clock circuit and the reset circuit provide the most basic working circuit for the STM32F103C8T6 main control chip, the MQ-5 sensor transmits the collected gas concentration to the STM32F103C8T6 main control chip, and the collected gas concentration is transmitted to the concentrator 2 through the LoRa communication module in a wireless manner after being processed.
As shown in fig. 3, the concentrator 2 is composed of an STM32F103C8T6 main control chip, a power supply module, an LoRa communication module, an ethernet control module, a clock circuit, and a reset circuit, and implements a network system combining LoRa and ethernet. The power module, the clock circuit and the reset circuit provide the most basic working circuit for the STM32F103C8T6 main control chip, and the STM32F103C8T6 main control chip gathers data of a plurality of detection nodes through the LoRa communication module, and then accesses the concentrator into the downhole Ethernet through the Ethernet control module.
The product design outward appearance of monitoring node 1 and concentrator 2 can be diversified, can design into square box type, wraps up the antenna of copper cap as loRa communication module outward, and monitoring node 1 adopts 9V square battery power supply, supplies with singlechip work to 3.3V through power supply circuit step-down. After the battery is loaded, the monitoring node 1 is automatically started, networking data are sent to the concentrator after initialization is completed, after the concentrator 2 receives a networking data packet of the monitoring node 2, the equipment address of the concentrator 2 and the networking sequence of the monitoring node 1 are numbered to the monitoring node in a descending mode, and the matching networking process is automatically completed.
As shown in fig. 4, the present invention adopts a compressed sensing algorithm to process data, and the principle is as follows: transmitting the data collected by the monitoring node to a concentrator; the concentrator determines common components according to the data of each node, performs joint sparse representation and joint coding, and then transmits the coded data to an upper computer; and performing combined reconstruction in the upper computer to recover the signal vector of each monitoring node, thereby solving the problems of large information transmission quantity and large node energy consumption.
As shown in fig. 5, the coal mine gas monitoring platform of the present invention is deployed on an upper computer of a coal mine monitoring center, and provides a human-computer interaction interface for a user, and its service functions include monitoring node management, real-time data display, historical data query, data storage, alarm information prompt, alarm parameter setting, and the like.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (8)
1. A coal mine gas monitoring system mainly comprises monitoring nodes (1), a concentrator (2), an exchanger (3) and an upper computer (4) of a ground monitoring center, and is characterized in that the monitoring nodes (1) are arranged in a branch roadway and a main roadway of a coal mine, one monitoring node is arranged at a certain distance for collecting the gas concentration at the monitoring node, the gas concentration is processed by a main control chip and then is uploaded to the concentrator (2) through a wireless transmission module, and meanwhile, if the concentration value exceeds the limit, sound and light alarm is carried out; the concentrator (2) is arranged at the junction of the branch roadways and is used for gathering the data of the related monitoring nodes in the branch roadways and the nearby main roadway, carrying out compression sensing algorithm processing, then accessing an underground light backbone network through the Ethernet control module and transmitting the data to the switch; the switch (3) is arranged at an underground outlet and provides more connection ports for a coal mine local area network so as to be connected with more computers; the upper computer (4) of the ground monitoring center is an industrial personal computer, a monitoring platform is installed, a man-machine interaction interface is provided, and the main service functions of the ground monitoring center comprise node management, real-time data display, historical data query, data storage, alarm information prompt, alarm parameter setting and the like.
2. The coal mine gas monitoring system according to claim 1, wherein the monitoring node (1) mainly comprises a control chip STM32F103C8T6, a LoRa wireless communication module, an MQ-5 gas concentration sensor, an alarm circuit, a JTAG circuit, a power supply module, a clock circuit and a reset circuit.
3. The monitoring node (1) according to claim 2, wherein the LoRa wireless communication module has advantages of long communication distance, strong anti-interference capability and ultra-low power consumption, and is particularly suitable for being used under a coal mine.
4. The coal mine gas monitoring system according to claim 1, wherein the concentrator (2) mainly comprises a control chip STM32F103C8T6 processor, a LoRa communication module, an Ethernet control module, a JTAG circuit, a power supply module, a clock circuit and a reset circuit.
5. The concentrator (2) according to claim 4, wherein protocol conversion between the LoRa wireless communication network and the optical fiber wired communication is realized, and normal communication is ensured.
6. A coal mine gas monitoring system according to claim 1, characterized in that the switch (3) is connected to the ground monitoring center upper computer (4) by optical fiber.
7. The coal mine gas monitoring system according to claim 1, wherein the upper computer (4) is provided with a monitoring platform to realize the functions of fast and accurate access, data transmission, data storage, data management and the like of the nodes.
8. The coal mine gas monitoring system of claim 1, wherein the compressed sensing algorithm is implemented by the steps of: and transmitting the data acquired by the monitoring nodes to a concentrator, determining common components by the concentrator according to the data of each node, performing joint sparse representation and joint coding, and transmitting the coded data to an upper computer. And performing combined reconstruction in the upper computer to recover the signal vector of each monitoring node, thereby solving the problems of large information transmission quantity and large node energy consumption.
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| CN202010087335.7A CN111350546A (en) | 2020-02-11 | 2020-02-11 | Coal mine gas monitoring system |
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| CN202010087335.7A CN111350546A (en) | 2020-02-11 | 2020-02-11 | Coal mine gas monitoring system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112031873A (en) * | 2020-08-09 | 2020-12-04 | 上海珩鋆机械有限公司 | Coal mine area gas monitoring facilities |
| CN112209196A (en) * | 2020-09-22 | 2021-01-12 | 淮北矿业股份有限公司 | Fault diagnosis and monitoring system of mine hoist |
| CN112302722A (en) * | 2020-11-17 | 2021-02-02 | 山西潞安环保能源开发股份有限公司常村煤矿 | Coal mine roadway multi-azimuth stress and deformation wireless monitoring and early warning method and system |
| CN113936436A (en) * | 2021-12-02 | 2022-01-14 | 国网山东省电力公司临沂供电公司 | Gaseous detection device of deep basal pit operation based on loRa wireless communication |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112031873A (en) * | 2020-08-09 | 2020-12-04 | 上海珩鋆机械有限公司 | Coal mine area gas monitoring facilities |
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Application publication date: 20200630 |