SCADA-based remote monitoring system for coal mine underground feeder switch

Abstract

The application discloses a coal mine underground power feeding switch remote monitoring system based on SCADA, relates to the technical field of coal mine electrical equipment monitoring, and comprises a main control room host computer system, an engineer station and an operator station are arranged in the main control room host computer system, wherein the engineer station is used for acquiring the number, parameter type and corresponding parameter data of the underground power feeding switch, and displaying on a configuration picture, the operator station is connected with the engineer station, and sends a close-open control instruction to the underground power feeding switch. The application constructs a main channel and a side channel, introduces a tentacle detection mechanism, uses a packaging conveying unit and a tentacle unit, realizes pre-detection of a transmission channel before data packet transmission, collects the signal strength, error code rate and transmission time delay of the next transmission channel in real time, compares with a preset threshold value dynamically, and completes channel switching before the data packet enters a poor link section.

Description

Technical Field

[0001] This invention relates to the field of monitoring technology for electrical equipment in underground coal mines, specifically to a remote monitoring system for underground power supply switches in coal mines based on SCADA. Background Technology

[0002] The underground power supply switch in a coal mine is a core piece of equipment in the underground power supply system, undertaking the functions of protection, control, and power distribution of the power supply lines. Its operating status is directly related to the safety of underground production and the reliability of power supply in the coal mine. Currently, the monitoring and operation of most underground power supply switches in coal mines still rely on manual on-site work. Workers need to go deep into the underground work site to check the operating parameters of the power supply switch and perform closing and opening operations. This is not only labor-intensive and inefficient, but also poses safety hazards due to the complex underground environment.

[0003] Some coal mines are currently experimenting with remote monitoring solutions. However, due to the harsh working environment underground (such as high dust levels, high humidity, and strong electromagnetic interference), the communication links for transmitting closing and opening commands may experience signal instability, severe signal attenuation, command loss, or mistransmission. When the transmission of closing and opening control commands is unstable, the power supply switch may fail to respond to remote control commands in a timely manner, resulting in problems such as delayed closing and untimely opening, thereby affecting normal coal production. Summary of the Invention

[0004] The purpose of this invention is to provide a remote monitoring system for underground power supply switches in coal mines based on SCADA, so as to solve the problems in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a remote monitoring system for underground power supply switches in coal mines based on SCADA, comprising: The main control room host computer system is equipped with an engineer station and an operator station. The engineer station is used to obtain the number, parameter type and corresponding parameter data of the downhole power supply switches and display them on the configuration screen. The operator station is connected to the engineer station and issues closing and opening control commands to the downhole power supply switches. The data acquisition and storage module is used to collect various operating parameters of the downhole power supply switch and transmit them to the engineering station; The remote control module connects to the operator station and transmits the closing and opening control commands sent by the operator station to the underground power supply switch via a communication link, enabling remote closing and opening control of the underground power supply switch. The communication link includes a safety channel.

[0006] In a preferred embodiment, the engineer station includes: The configuration editing and running module is used to edit, modify, and save the number and parameter types of downhole power feeders displayed in the configuration screen, and synchronize the edited configuration screen to the operator station. The configuration screen of the engineer station is consistent with the configuration screen of the operator station.

[0007] In a preferred embodiment, the operator station includes: The configuration operation module is used to acquire the configuration screen synchronized with the engineer station and distribute closing and opening control commands to remotely operate the underground power supply switch.

[0008] In a preferred embodiment, the data acquisition and storage module includes: The data acquisition and storage unit is connected to the serial port server, receives the downhole power supply switch parameter data transmitted by the serial port server, and transmits it to the configuration editing and running module to update the configuration screen.

[0009] In a preferred embodiment, the remote control module includes: Construction unit, used to establish a safety passage between the engineering station and the downhole power supply switch; The transmitting unit is used to transmit the closing and opening control commands sent by the engineer station through the escort channel, and to safely deliver the closing and opening control commands through the escort channel during the transmission process. The control unit is used to control the downhole power supply switch via closing and opening control commands.

[0010] In a preferred embodiment, the escort channel includes: The link segmentation unit is used to divide the escort channel into a main channel and a side channel. Multiple detection points are equally distributed on both the main channel and the side channel, and the main channel and the side channel are divided into multiple transmission channels through the multiple detection points. The encapsulation and transmission unit is used to encapsulate the closing and opening control commands in a data packet. The data packet is transmitted in the main channel and the side channel, passing through the detection points in sequence. The detection points transform the data packet to the high-quality transmission channels on the main channel and the side channel for transmission.

[0011] In a preferred embodiment, the packaging delivery unit includes: The instruction encapsulation subunit is used to extract the instruction code, check bit and target feeder switch address information of the closing and opening control instruction, and encapsulate them into the data packet in sequence; Tentacle units are used to store multiple tentacles at each detection point. When a data packet enters the main channel, the tentacles stored at the detection point closest to the data packet in the transmission direction will connect with the data packet. The tentacles will follow the data packet in the transmission channel and will be located in the next transmission channel segment first. The channel detection subunit is used to collect the signal strength, bit error rate and transmission delay of the next transmission channel when the tentacles on the data packet come into contact with the detection point, and compare them with the preset normal threshold to determine whether the signal of the transmission channel is normal. The channel switching subunit is used to switch data packets to the transmission channel on the side channel when the data exceeds a preset normal threshold, and to switch data packets on the side channel to the main channel for transmission when the data exceeds the normal threshold.

[0012] In a preferred embodiment, the channel switching subunit includes: The judgment subunit is used to switch the side channel output channel when the tentacle connection on the data packet is broken and the data packet is connected to the tentacle in the nearest detection point to the data packet in the transmission direction when the preset normal threshold is exceeded. The supplementary subunit is used to replace the disconnected tentacles with those of the data packets at the detection point after the data packets and connected tentacles have left the detection point, until the data packets reach the receiving end.

[0013] The technical effects and advantages provided by the present invention in the above technical solution are as follows: 1. This invention constructs escort channels between the main channel and the side channel, and introduces a tentacles detection mechanism. By utilizing the encapsulated delivery unit and the tentacles, it realizes the pre-detection of the transmission channel before the data packet is transmitted. By collecting the signal strength, bit error rate and transmission delay of the next transmission channel in real time and dynamically comparing them with preset thresholds, the channel switching is completed before the data packet enters the inferior link segment, effectively resisting the effects of underground electromagnetic interference, signal attenuation and other factors, and ensuring that the closing and opening control commands are accurately delivered. 2. This invention achieves dynamic cycling and seamless switching of tentacles through judgment sub-units and supplementary sub-units. When the data packet jumps between the main channel and the side channel, the nearest detection point tentacle on the new channel is quickly captured. At the same time, by recovering the disconnected tentacles and supplementing them to the idle detection points, an efficient resource regeneration closed loop is formed. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a system flowchart of the present invention.

[0016] Figure 2 This is a logic block diagram of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1, please refer to Figure 1 As shown in this embodiment, the remote monitoring system for underground power supply switches in coal mines based on SCADA includes: The main control room host computer system is equipped with an engineer station and an operator station. The engineer station is used to obtain the number, parameter type and corresponding parameter data of the downhole power supply switches and display them on the configuration screen. The operator station is connected to the engineer station and issues closing and opening control commands to the downhole power supply switches. The data acquisition and storage module is used to collect various operating parameters of the downhole power supply switch and transmit them to the engineering station; The remote control module connects to the operator station and transmits the closing and opening control commands sent by the operator station to the underground feeder switch via a communication link (using shielded twisted-pair cable to connect the feeder switch and the serial port server), thereby enabling remote closing and opening control of the underground feeder switch. The communication link includes a safety channel.

[0019] Furthermore, an engineering station and several operator stations are set up (configured according to the size of the coal mine's main control room), all using industrial-grade computers with anti-interference, dustproof, and shockproof performance, suitable for the industrial environment of the main control room; the underground power supply switch is a mine-use explosion-proof power supply switch with RS485 (Modbus) communication function. The parameters of the underground power supply switch are transmitted to the serial port server through shielded twisted pair cable via the data acquisition and storage module; the serial port server converts the RS485 serial port signal into an Ethernet signal and transmits the parameter data to the engineering station. The engineering station synchronizes the underground power supply switch parameter information on the configuration screen to the configuration screen of the operator station. The operator station views the parameter information on the configuration screen. If the power supply switch needs to be closed or opened, a control command is issued. The control command is transmitted to the underground power supply switch through the communication link in the remote control module. After receiving the control command and verifying that it is correct, the power supply switch executes the corresponding closing or opening action and feeds back the execution result to the main control room; the communication link is protected by an escort channel to avoid communication problems such as easy interference, high latency, and high packet loss rate.

[0020] In one embodiment, the engineer station includes: The configuration editing and running module is used to edit, modify, and save the number and parameter types of downhole power feeders displayed in the configuration screen, and synchronize the edited configuration screen to the operator station. The configuration screen of the engineer station is consistent with the configuration screen of the operator station.

[0021] Furthermore, the engineer station is equipped with configuration editing software, which has editing, modification, saving and running functions. It can edit the operating parameters and switch status of each feeder switch according to the number of feeder switches, parameter types and corresponding parameter data in the well. After editing, it can be synchronized to all operator stations through the internal local area network.

[0022] In one embodiment, the operator station includes: The configuration operation module is used to acquire the configuration screen synchronized with the engineer station and distribute closing and opening control commands to remotely operate the underground power supply switch.

[0023] Furthermore, the operator station is equipped with configuration and operation software, which obtains the downhole power supply switch parameter information sent by the engineer station through the internal local area network. The operator station only has the functions of running configuration screen, parameter monitoring and closing / opening operation. The operator station can view the voltage, current, power, switch status, fault information and other parameters of each downhole power supply switch in real time through the configuration screen. By clicking the closing / opening button on the screen, control commands can be issued.

[0024] In one embodiment, the data acquisition and storage module includes: The data acquisition and storage unit is connected to the serial port server, receives the downhole power supply switch parameter data transmitted by the serial port server, and transmits it to the configuration editing and running module to update the configuration screen.

[0025] Furthermore, the data acquisition and storage unit connects to the serial port server via a physical interface to establish stable low-level communication. The serial port server, acting as the communication gateway for the underground power supply switch field equipment, is responsible for uniformly aggregating the raw serial data streams of varying protocol types output by the underground power supply switch, converting them into a network-compatible transmission format, and stably sending them to the data acquisition and storage unit. The data acquisition and storage unit then transmits the normalized real-time data to the configuration editing and running module of the engineering station in real time via the Ethernet communication protocol. After receiving the data, the configuration module immediately drives the corresponding data frames and other elements on the configuration screen to dynamically update according to the pre-configured variable mapping relationships.

[0026] In one embodiment, the remote control module includes: Construction unit, used to establish a safety passage between the engineering station and the downhole power supply switch; The transmitting unit is used to transmit the closing and opening control commands sent by the engineer station through the escort channel, and to safely deliver the closing and opening control commands through the escort channel during the transmission process. The control unit is used to control the downhole power supply switch via closing and opening control commands.

[0027] Furthermore, after the operator station issues the closing / opening control command, the control command is transmitted to the serial port server via Ethernet. The serial port server converts the Ethernet signal into an RS485 serial port signal and transmits it to the Modbus communication module of the underground feeder switch via a shielded twisted pair cable. The shielded twisted pair cable is an external device that serves as a communication channel between the serial port server and the underground feeder switch. Once the data packet is successfully transmitted to the receiving end of the underground feeder switch, the command parsing function is activated to accurately extract the command code, check bit, and target feeder switch address information from the data packet. The integrity and accuracy of the extracted information are verified. After the verification is passed, the command is sent to the target feeder switch to drive it to perform the corresponding closing / opening operation, thus completing the landing of the entire remote control command.

[0028] In one embodiment, the escort channel includes: The link segmentation unit is used to divide the escort channel into a main channel and a side channel. Multiple detection points are evenly distributed on both the main channel and the side channel (cloud servers are configured for communication nodes to store and distribute tentacles). The main channel and the side channel are divided into multiple transmission channels through multiple detection points. The encapsulation and transmission unit is used to encapsulate the closing and opening control commands in a data packet. The data packet is transmitted in the main channel and the side channel, passing through the detection points in sequence. The detection points transform the data packet to the high-quality transmission channels on the main channel and the side channel for transmission.

[0029] Furthermore, the link segmentation unit constructs two parallel transmission paths: the "main channel" and the "side channel." The main channel and side channel are divided into several small transmission segments by equidistantly distributed detection points. These detection points act like "road condition monitoring stations" on a highway, monitoring the signal quality, bandwidth utilization, and bit error rate of each link segment in real time. When a closing / opening command is issued, the control command, upon entering the escort channel, is encapsulated by the encapsulation and transmission unit to generate a data packet. The data packet then enters the main channel for transmission. During transmission, each time the data packet passes through a detection point, the detection point evaluates the transmission quality of the next transmission channel segment. If congestion, interference, or signal attenuation is detected in the next transmission channel segment, the data packet is transferred to the side channel for transmission. This effectively avoids transmission delays and bit errors caused by electromagnetic interference and signal attenuation underground, ensuring that the bit error rate of command transmission is minimized and transmission delay is controlled within a reasonable range, thus improving the stability and efficiency of command transmission.

[0030] In one embodiment, the packaging delivery unit includes: The instruction encapsulation subunit is used to extract the instruction code, check bit and target feeder switch address information of the closing and opening control instruction, and encapsulate them into the data packet in sequence; Tentacle units are used to store multiple tentacles at each detection point. When a data packet enters the main channel, the tentacles stored at the detection point closest to the data packet in the transmission direction will connect with the data packet. The tentacles will follow the data packet in the transmission channel and will be located in the next transmission channel segment first. The channel detection subunit is used to collect the signal strength, bit error rate and transmission delay of the next transmission channel when the tentacles on the data packet come into contact with the detection point, and compare them with the preset normal threshold to determine whether the signal of the transmission channel is normal. The channel switching subunit is used to switch data packets to the transmission channel on the side channel when the data exceeds a preset normal threshold, and to switch data packets on the side channel to the main channel for transmission when the data exceeds the normal threshold.

[0031] Furthermore, the instruction encapsulation subunit first processes the original instruction to accurately extract the instruction code (to determine the operation type), checksum (to ensure the instruction has not been tampered with), and target address (to ensure the instruction is sent to the correct device). According to the established communication standard, this information is filled into the data packet. After the encapsulated data packet enters the main channel, the tentacles immediately activate the detection point closest to the data packet on the transmission path, connecting the tentacles at the detection point to the data packet. As the vanguard of the data packet, the tentacles detach from the detection point and follow the data packet forward, always positioned ahead of the data packet, entering the next transmission channel first, thus achieving advance detection of the next link. When the tentacles connected to the data packet pass through the entrance detection point of the next transmission channel, they collect core data such as signal strength, bit error rate, and transmission delay of the next transmission channel. Subsequently, the channel detection subunit compares these real-time data with preset normal thresholds. Yes, if the parameters are within the threshold, the link is considered healthy; if they exceed the threshold, the transmission channel is considered abnormal. The channel switching subunit makes the final decision based on the detection results. If the data returned by the tentacles indicates that the quality of the next segment of the transmission channel of the current main channel is substandard, the main channel is triggered to switch to the side channel, and the data packet is switched from the main channel to the corresponding transmission channel of the side channel to continue transmission. The main channel and the side channel are switched through the detection point connection, thereby completing the path optimization. The whole process realizes millisecond-level dynamic routing adjustment, ensuring that the data packet is transmitted in the optimal link throughout the entire process. By introducing the tentacles pre-detection mechanism and dynamic switching logic, the traditional passive retransmission is changed to active obstacle avoidance.

[0032] In one embodiment, the channel switching subunit includes: The judgment subunit is used to switch the side channel output channel when the tentacle connection on the data packet is broken and the data packet is connected to the tentacle in the nearest detection point to the data packet in the transmission direction when the preset normal threshold is exceeded. The supplementary subunit is used to replace the disconnected tentacles with those of the data packets at the detection point after the data packets and connected tentacles have left the detection point, until the data packets reach the receiving end.

[0033] Furthermore, when data packets are transmitted in the main channel, channel switching is triggered due to channel quality degradation. During the switch to the side channel, the connection between the original tentacles and the data packets may break. At this point, the judgment subunit responds immediately, quickly scanning all detection points in the current transmission direction of the side channel, locating the detection point closest to the data packet, and triggering a new connection between the tentacles within that detection point and the data packet. This ensures that after the data packet enters the side channel, tentacles continue to accompany it, continuously conducting transmission channel pathfinding and status monitoring. Once the data packet completes the connection with the tentacles at the new detection point, and the data packet and tentacles leave the detection point where supplementary tentacles are provided, the supplementary subunit immediately conducts a comprehensive check of the tentacles at all detection points, identifying detection points lacking tentacles due to detachment. Subsequently, the supplementary subunit reassigns the previously disconnected idle tentacles to the detection points lacking tentacles. Within the monitoring point, the tentacles are replenished. When a data packet arrives at the receiving end of the underground power supply switch, the tentacles connected to the data packet disconnect and are replenished to the monitoring points lacking tentacles, ensuring that all monitoring points always have available tentacles. This guarantees that subsequent data packet transmissions can quickly find available tentacles, keeping tentacle resources at all monitoring points consistently sufficient. The process for data packets and connected tentacles on the side channel is the same as on the main channel. After the data packet disconnects from the tentacles on the side channel, it switches to the main channel, where the tentacles at the monitoring points connect to the data packet. Regardless of how the data packet switches between the main and side channels, tentacles are always present for monitoring. This achieves efficient tentacle circulation and self-healing.

[0034] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A remote monitoring system for underground power feeder switches in coal mines based on SCADA, characterized in that, include: The main control room host computer system is equipped with an engineer station and an operator station. The engineer station is used to obtain the number, parameter type and corresponding parameter data of the downhole power supply switches and display them on the configuration screen. The operator station is connected to the engineer station and issues closing and opening control commands to the downhole power supply switches. The data acquisition and storage module is used to collect various operating parameters of the downhole power supply switch and transmit them to the engineering station; The remote control module connects to the operator station and transmits the closing and opening control commands sent by the operator station to the underground power supply switch via a communication link, enabling remote closing and opening control of the underground power supply switch. The communication link includes a safety channel.

2. The remote monitoring system for underground power supply switches in coal mines based on SCADA as described in claim 1, characterized in that, The engineering station includes: The configuration editing and running module is used to edit, modify, and save the number and parameter types of downhole power feeders displayed in the configuration screen, and synchronize the edited configuration screen to the operator station. The configuration screen of the engineer station is consistent with the configuration screen of the operator station.

3. The remote monitoring system for underground power supply switches in coal mines based on SCADA according to claim 1, characterized in that, The operator station includes: The configuration operation module is used to acquire the configuration screen synchronized with the engineer station and distribute closing and opening control commands to remotely operate the downhole power supply switch.

4. The remote monitoring system for underground power supply switches in coal mines based on SCADA as described in claim 1, characterized in that, The data acquisition and storage module includes: The data acquisition and storage unit is connected to the serial port server, receives the downhole power supply switch parameter data transmitted by the serial port server, and transmits it to the configuration editing and running module to update the configuration screen.

5. The remote monitoring system for underground power supply switches in coal mines based on SCADA according to claim 1, characterized in that, The remote control module includes: The building unit is used to establish a support passage between the engineering station and the downhole power supply switch; The transmitting unit is used to transmit the closing and opening control commands sent by the engineer station through the escort channel, and to safely deliver the closing and opening control commands through the escort channel during the transmission process. The control unit is used to control the downhole power supply switch via closing and opening control commands.

6. The remote monitoring system for underground power supply switches in coal mines based on SCADA according to claim 5, characterized in that, The escort channel includes: The link segmentation unit is used to divide the escort channel into a main channel and a side channel. Multiple detection points are equally distributed on both the main channel and the side channel, and the main channel and the side channel are divided into multiple transmission channels through the multiple detection points. The encapsulation and transmission unit is used to encapsulate the closing and opening control commands in a data packet. The data packet is transmitted in the main channel and the side channel, passing through the detection points in sequence. The detection points transform the data packet to the high-quality transmission channels on the main channel and the side channel for transmission.

7. The remote monitoring system for underground power supply switches in coal mines based on SCADA according to claim 6, characterized in that, The packaging and delivery unit includes: The instruction encapsulation subunit is used to extract the instruction code, check bit and target feeder switch address information of the closing and opening control instruction, and encapsulate them into the data packet in sequence; Tentacle units are used to store multiple tentacles at each detection point. When a data packet enters the main channel, the tentacles stored at the detection point closest to the data packet in the transmission direction will connect with the data packet. The tentacles will follow the data packet in the transmission channel and will be located in the next transmission channel segment first. The channel detection subunit is used to collect the signal strength, bit error rate and transmission delay of the next transmission channel when the tentacles on the data packet come into contact with the detection point, and compare them with the preset normal threshold to determine whether the signal of the transmission channel is normal. The channel switching subunit is used to switch data packets to the transmission channel on the side channel when the data exceeds a preset normal threshold, and to switch data packets on the side channel to the main channel for transmission when the data exceeds the normal threshold.

8. The remote monitoring system for underground power feeder switches in coal mines based on SCADA according to claim 7, characterized in that, The channel switching subunit includes: The judgment subunit is used to switch the side channel output channel when the tentacle connection on the data packet is broken and the data packet is connected to the tentacle in the nearest detection point to the data packet in the transmission direction when the preset normal threshold is exceeded. The supplementary subunit is used to replace the disconnected tentacles with those of the data packets at the detection point after the data packets and connected tentacles have left the detection point, until the data packets reach the receiving end.

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