Combustible gas detection and early warning intelligent control system based on Internet of Things

Abstract

The invention relates to the technical field of coal mine security and protection, in particular to an underground coal mine combustible gas detection and early warning intelligent control system. The invention aims to provide a combustible gas detection and early warning intelligent complete set control system based on the Internet of Things, aiming at the defects in the existing combustible gas detection and control system of the underground coal mine working face. The system is suitable for effectively detecting the concentration of the combustible gas on the working face in the coal mining process, accurately, intelligently and quickly reducing the concentration of the combustible gas exceeding the set concentration, and transmitting the real-time concentration of each detection point on the working face to the central control system for display. The gas detector can conveniently and directly check the gas concentration of each gas detection point in a monitoring room, time and labor are saved, the safety is good, and the gas detector is convenient to popularize and use. And life and property safety of workers on the mine working face is guaranteed.

Description

Technical Field

[0001] The patent of this invention relates to the field of coal mine security technology, specifically an intelligent control system for combustible gas detection and early warning in coal mines. Background Art

[0002] Analysis of numerous mine gas explosions reveals that the concentration of combustible gases, such as methane, increases exponentially before an explosion. Therefore, undetected combustible gas poses a significant safety hazard to coal mines and their workers. Intelligently reducing the concentration of combustible gases before they reach 10% of the lower explosion limit is a crucial measure for protecting the lives and property of coal mine workers. The state has strict regulations on combustible gas concentrations during underground coal mining. Whether a coal mine has an intelligent control system for combustible gas detection and early warning directly reflects its intelligence level. According to regulations of the Ministry of Emergency Management, the alarm concentrations and power-off levels for combustible gas at different locations on the mine working face vary, ranging from 0.5% to 1.5%. Traditional methane detection and control systems have a low level of automation. They simply set up gas monitoring points and implement a three-eighth inspection system, with one inspection per shift every 6-10 hours. However, traditional methane detection and control systems are unable to monitor gas concentrations at the working face in real time and transmit this information back to the central control system. Furthermore, inspections by gas inspectors are burdensome, time-consuming, and labor-intensive. Furthermore, underground working conditions in coal mines are harsh and unsafe. Furthermore, they cannot quickly reduce gas concentrations when they exceed a set point, posing a significant safety risk. Summary of the Invention

[0003] The present invention addresses the shortcomings of existing combustible gas detection and control systems for underground coal mine working faces by providing an intelligent, complete control system for combustible gas detection and early warning based on the Internet of Things. This system is suitable for effectively detecting combustible gas concentrations at the working face during coal mining operations, while accurately, intelligently, and rapidly reducing concentrations exceeding a set level. The system also transmits real-time concentrations at each detection point on the working face to a central control system for display, allowing gas inspectors to directly view gas concentrations at each detection point in the monitoring room. This system saves time and effort, is highly safe, and is readily available for widespread use. It also protects the lives and property of workers working on the working face of the mine. To address the aforementioned technical issues, the present invention employs a technical solution: an intelligent, Internet of Things-based control system for combustible gas detection and early warning, characterized by comprising a combustible gas detection system located underground in the coal mine and used at detection points, a combustible gas concentration data transmission system located underground in the coal mine, and an intelligent, integrated management and control system located above ground. The intelligent, Internet of Things-based control system for combustible gas detection and early warning consists of three subsystems: the combustible gas concentration detection system, the data transmission system, and the intelligent, integrated management and control system. The entire system is connected to an intelligent, integrated management and control platform for coordinated control. The combustible gas concentration detection system consists of a combustible gas concentration sensor module, an A / D converter module, a blower module, an indicator light, and a power supply. The data transmission system comprises a single-chip information processing module (slave) and a ZigBee wireless signal transmitter and receiver module. The central control system consists of a single-chip information processing module (master), an LCD display module, an alarm module, and a keypad module. The combustible gas concentration detection system located on the roof collects real-time information about the working face's combustible gas concentration. This information is converted by an A / D conversion module and transmitted to the microcontroller information processing module (slave). The microcontroller processing module (slave) then transmits the signal to the microcontroller processing module (master) via a ZigBee wireless signal transmitter. When the concentration signal reaches the set point, the microcontroller processing module (master) controls the microcontroller information processing module (slave) to activate the blower module, which uses a PID algorithm to control air volume, reducing the combustible gas concentration in the area where the monitoring point is located and directing the combustible gas to the return airway. Simultaneously, all supporting blowers in the return airway are activated to exhaust the combustible gas through the return airway. The LCD display shows the combustible gas concentration at each monitoring point in real time for staff monitoring. Simultaneously, the combustible gas concentration information is transmitted via a signal transmission line from the chute monitoring center to the intelligent integrated management and control platform. Based on this information, the intelligent integrated management and control platform controls the blower air volume in the working face in real time, achieving precise and intelligent reduction of combustible gas concentration. A set of combustible gas concentration detection systems is installed at every support device on the working face. Monitor the combustible gas concentration on the working surface in real time. When the concentration is too high, the blower module will reduce the combustible gas concentration and sound and light alarms will be issued to warn the personnel on the working surface.The above-mentioned combustible gas detection system is characterized in that: the detection module also includes an audible and visual alarm, and the alarm is directly controlled by the combustible gas detection system. The above-mentioned combustible gas detection system is characterized in that: the combustible gas detection system and the combustible gas transmission system are wirelessly connected using Zigbee technology. The above-mentioned combustible gas detection system is characterized in that: the intelligent integrated management and control system terminal is a computer. The present invention has a high level of automation and can monitor the working face situation in real time. It greatly reduces the degree of danger for working face personnel in performing gas monitoring tasks, and at the same time can intelligently reduce the combustible gas concentration at the first time, effectively preventing the combustible gas from reaching the minimum explosion concentration and taking a series of control measures to ensure the safety of life and property of coal mine working face personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0004] Figure 1 This is the structural diagram of the intelligent control system for combustible gas detection and early warning on the working face; Figure 2 Arrange the structural diagram for the intelligent control system of combustible gas detection and early warning for the working face; Figure 3 Arrange a distribution diagram for the intelligent control system for combustible gas detection and early warning at the working face; 1. Top beam 2. Guard plate 3. Combustible gas sensor 4. Vertical column 5. Tail beam 6. Base 7. Smart fan 8. Pushing device 9. Rotatable hanging arm. DETAILED DESCRIPTION

[0005] The combustible gas concentration detection system consists of an intelligent combustible gas detection group and an intelligent blower device group arranged in a cross pattern. The intelligent combustible gas detection equipment group contains two combustible gas sensor devices. The sensors are detachable and can accurately detect different types of combustible gases and quickly repair and replace them, ensuring the normal operation of the combustible gas detection and early warning devices on different working faces. The intelligent blower device group can control the air volume through the PID control algorithm, automatically reducing the combustible gas concentration, effectively preventing the combustible gas from reaching the minimum explosion concentration, and at the same time controlling the air volume to avoid the generation of dust caused by excessive air volume. The combustible gas concentration detection system is arranged on the top beam of the hydraulic support. Since the environment of the coal mining working face is relatively complex and there are many types of combustible gases, the combustible gas sensor uses a detachable sensor. It can not only cover all the combustible gases that need to be detected, but also greatly reduce the time spent on repairs when the sensor fails, ensuring the safe progress of mining work on the working face, while protecting the lives and property of the workers and improving work efficiency. The data transmission system is arranged in the chute monitoring center. When the combustible gas concentration signal transmitted by the combustible gas concentration detection system exceeds the set concentration, the data transmission system will control the single-chip computer information processing module (slave) to start the blower module to reduce the combustible gas concentration in the area where the monitoring point is located. At the same time, all the supporting blowers in the return air lane are started to discharge the combustible gas through the return air lane, and the combustible gas concentration is displayed in real time on the LCD display module for staff monitoring. At the same time, the combustible gas concentration information is sent to the intelligent integrated management and control platform through the signal transmission line of the chute monitoring center. The intelligent integrated management and control platform can control the blower air volume of the working face in real time based on this information, so as to achieve the purpose of accurately and intelligently reducing the combustible gas concentration and effectively ensure safe production. The intelligent integrated management and control system is located on the ground. By analyzing the combustible gas concentration at each monitoring point in the mine and comprehensively managing the air volume of each blower, it ensures the safe operation of the working face in real time. In order to realize the continuous monitoring and data collection of combustible gas concentration parameters at the working face, the main hardware facilities of the combustible gas concentration detection system, data transmission system and intelligent integrated management and control system include data acquisition server, data processing server and management terminal computer. The data acquisition server is located at the coal mining working face, the data processing server is located at the chute monitoring center, and the management terminal computer is located on the ground.The data acquisition server includes a central processing unit (slave), an A / D conversion module, a ZigBee wireless signal transmission and reception module, a sensor module, an intelligent fan module, and an audio and visual alarm module. The A / D conversion module is connected to the sensor module and is responsible for converting the analog signal transmitted by the sensor module into a digital signal for the central processing unit (slave) to read. The ZigBee wireless signal transmission and reception module is connected to the central processing unit (slave). The central processing unit (slave) can directly control the transmission and reception of ZigBee wireless signal transmission devices via wide pins. When an alarm signal is transmitted from the data processing server, the audio and visual alarm module is activated, and the intelligent fan module is also activated. The data processing server includes a central processing unit (host), a ZigBee wireless signal transmission and reception module, an LCD display module, a button module, and an audio and visual alarm module. The button module can set the alarm concentration, the ZigBee wireless signal transmission and reception module is responsible for receiving data from the machine and sending it to the central processor (host). The host controls the LCD display module to display the transmitted data in real time and compare it with the set alarm concentration. If the alarm concentration is exceeded, an alarm signal is sent to the data acquisition server and the sound and light alarm module is activated. At the same time, real-time combustible gas concentration information is sent to the management terminal computer on the ground through wired transmission. If it does not exceed the limit, it will continue to maintain the standby detection state.

[0006] The management terminal computer, located above ground, directly processes real-time combustible gas concentration information transmitted by the data processing server and uses this information to coordinate the management of fans and personnel dispatch at each monitoring point. Each sensor device group includes two detachable sensors, one for detecting methane and carbon monoxide, two common gases found in coal mines. Each sensor is directly connected to the central processing unit (slave) and then to the central processing unit (master) via a ZigBee wireless signal transmission and reception module. Several data acquisition servers are connected to the data processing server, which is then wired to the management terminal computer. Operations are performed through the management terminal computer connected to the data acquisition server, thus enabling the collection, monitoring, supervision, and management of data on the most common combustible gases in coal mines, such as carbon monoxide and methane. The data processing server uses information provided by the data acquisition server to send execution commands to control the intelligent fans and the sound and light alarm modules. When the preset alarm concentration is met, the intelligent fans are turned on to provide early warning and control of combustible gases. Simultaneously, the sound and light system will sound an alarm to alert workers at the working face, ensuring the safety of their lives and property. In addition, the data acquisition server of the working face will feed back the concentration information after taking measures to reduce the concentration to the information processing server in real time. After the information processing system processes the information, it will be provided to the information acquisition system for subsequent processing. At the same time, the management terminal computer controls the relevant equipment of the working face to make adjustments, forming a closed-loop system to ensure the best control effect on the combustible gas on the working face.

[0007] In addition to being controlled through the information control system, the intelligent control system for combustible gas detection and early warning can also be manually controlled according to the actual situation of the working face. In the event of an unexpected situation, it can also ensure the normal operation of the entire system and protect the personal safety of the workers on the working face.

[0008] The intelligent control system for combustible gas detection and early warning will also be connected to the comprehensive intelligent integrated management and control platform. The staff can coordinate and control the entire system on the management and control platform, which greatly improves the automation level of coal mines, reduces the burden on staff, ensures the safety of life and property of coal mine workers, and improves the intelligence level of coal mines.

Claims

1. The technical solution adopted by the present invention is: an intelligent control system for combustible gas detection and early warning based on the Internet of Things, characterized by: It includes a combustible gas detection system installed underground in a coal mine and used at the detection point, a combustible gas concentration data transmission system installed underground in the coal mine, and an intelligent integrated management and control system installed on the ground; an intelligent control system for combustible gas detection and early warning based on the Internet of Things, which consists of three subsystems: a combustible gas concentration detection system, a data transmission system, and an intelligent integrated management and control system. At the same time, the entire system is connected to an intelligent integrated management and control platform, and can be coordinated and controlled as a whole by the management and control platform.

2. The combustible gas concentration detection system consists of a combustible gas concentration sensor module, A / D converter module, blower module, indicator light, and power supply. The data transmission system comprises a single-chip microcomputer information processing module (slave) and ZigBee wireless signal transmitter and receiver modules. The central control system comprises a single-chip microcomputer information processing module (master), LCD display module, alarm module, and keypad module. The combustible gas concentration detection system located on the top plate collects the combustible gas concentration of the working face in real time, converts the collected information through the A / D conversion module and transmits it to the single-chip computer information processing module (slave), which then sends the signal to the single-chip computer processing module (host) through the ZigBee wireless signal transmitter. When the concentration signal reaches the set concentration, the single-chip computer processing module (host) will control the single-chip computer information processing module (slave) to start the blower module to use the PID algorithm to control the air volume, reduce the combustible gas concentration in the area where the monitoring point is located, and send the combustible gas to the return air channel. At the same time, all the supporting blowers in the return air channel are started to discharge the combustible gas through the return air channel, and the combustible gas concentration reached at each monitoring point is displayed in real time on the LCD display module for staff monitoring. At the same time, the combustible gas concentration information is sent to the intelligent integrated management and control platform through the signal transmission line of the chute monitoring center. The intelligent integrated management and control platform can control the blower air volume of the working face in real time according to the information, so as to achieve the purpose of accurately and intelligently reducing the combustible gas concentration; a group of combustible gas concentration detection systems are set up for each support device on the working face; the combustible gas concentration of the working face is monitored in real time. When the concentration is too high, the combustible gas concentration is reduced through the blower module, and an audible and visual alarm is issued at the same time to warn the personnel on the working face.

3. The above-mentioned combustible gas detection system is characterized by: The detection module also includes an audible and visual alarm, which is directly controlled by the combustible gas detection system.

4. The above-mentioned combustible gas detection system is characterized by: Zigbee technology is used to establish wireless connection between the combustible gas detection system and the combustible gas transmission system.

5. The above-mentioned combustible gas detection system is characterized by: The terminal of the intelligent integrated management and control system is a computer.

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