Coal mine power supply management system and method based on power line carrier communication

Abstract

The invention provides a coal mine power management system and method based on power line carrier communication, the system comprises a monitoring terminal and a plurality of power box devices, the monitoring terminal comprises a first power line carrier communication module, and communicates with each power box device based on power line carrier communication; the distance measuring module sends a distance measuring signal to each power box device and calculates the distance to each power box device based on the response signal; the addressing module allocates a unique address to each power box device according to the calculated distance information of each power box device; the management module monitors and manages the power box equipment based on the unique address; the power box equipment comprises a second power line carrier communication module which communicates with the first power line carrier communication module; the response unit receives and returns a response signal; the address storage unit stores address information, accurate ranging and automatic addressing of the power box equipment are achieved, the problems that traditional manual addressing is low in efficiency and prone to errors are solved, and the power management system has practicability.

Description

Coal Mine Power Management System and Method Based on Power Line Carrier Communication Technical Field

[0001] This invention relates to the field of intelligent coal mining technology, and in particular to a coal mine power management system and method based on power line carrier communication. Background Technology

[0002] In intelligent coal mining, the power management system is a core component ensuring stable power supply to critical equipment such as electro-hydraulic control systems and sensor networks. Traditional power management systems typically use RS485 or CAN bus communication, manually assigning addresses to each power supply box for data acquisition and equipment identification. However, the underground environment of coal mines is complex, and equipment is widely distributed (e.g., the length of a fully mechanized mining face can reach hundreds of meters). Manual addressing is not only inefficient but also prone to address conflicts or data corruption due to operational errors, seriously affecting system reliability. Summary of the Invention

[0003] This invention provides a coal mine power management system and method based on power line carrier communication, which solves the defects of traditional power management systems that manually assign addresses to each power box, resulting in low efficiency and easy address conflicts or data corruption due to operational errors.

[0004] This invention provides a coal mine power management system based on power line carrier communication, comprising: a monitoring terminal and multiple power supply box devices, wherein the monitoring terminal is connected to each power supply box device via power lines; the monitoring terminal includes: a first power line carrier communication module for communicating with each power supply box device based on power line carrier communication; a ranging module for sending ranging signals to each power supply box device and calculating the distance to each power supply box device based on response signals; an addressing module for assigning a unique address to each power supply box device based on the calculated distance information; and a management module for monitoring and managing the power supply box devices based on the unique addresses assigned to each power supply box device; each power supply box device includes: a second power line carrier communication module for communicating with the first power line carrier communication module; a response unit for receiving the ranging signals sent by the ranging module and returning response signals; and an address storage unit for storing the address information assigned by the monitoring terminal.

[0005] According to the coal mine power management system based on power line carrier communication provided by the present invention, the ranging module is specifically used for: sending a time synchronization message to the target power box device via power line carrier, so that the target power box device adjusts its local clock according to the received synchronization message and synchronizes with the monitoring terminal; recording the transmission time T1 of the ranging initiation frame and sending the ranging initiation frame to the target power box device; receiving the reception time T2 and the transmission time T3 of the ranging response frame sent by the target power box device; receiving the ranging response frame and recording the reception time T4 of the ranging response frame; calculating the signal transmission time Δt according to the timestamps T1, T2, T3, and T4, where Δt = [(T4 - T1) - (T3 - T2)]; and calculating the distance d between the monitoring terminal and the target power box device according to the signal transmission time, where d = Δt × v / 2, and v is the propagation speed of the signal in the power line.

[0006] According to the coal mine power management system based on power line carrier communication provided by the present invention, the ranging module is further used to: perform multiple ranging measurements on the same target power box equipment, and take the arithmetic average value as the final distance value between the monitoring terminal and the target power box equipment.

[0007] According to the coal mine power management system based on power line carrier communication provided by the present invention, the addressing module is specifically used for: the monitoring terminal obtaining the ranging results of each power box device through power line carrier communication, the ranging results including device identifiers and corresponding distance values; sorting all power box devices in ascending order of distance values; assigning a continuously increasing sequence number to each sorted power box device; constructing a topology relationship based on the mapping relationship between the sequence number and the device identifier; and address encoding the power box devices according to the topology relationship and the addressing mode.

[0008] According to the coal mine power management system based on power line carrier communication provided by the present invention, the addressing module is further configured to: when a new power supply box device is detected to be connected or an existing power supply box device is removed, re-execute the ranging, sorting and sequence number allocation operations to update the topology relationship.

[0009] According to the coal mine power management system based on power line carrier communication provided by the present invention, the addressing module is further configured to: when the distance values ​​are the same, perform secondary sorting of the power supply box equipment according to the receiving time of the ranging response frames.

[0010] According to the coal mine power management system based on power line carrier communication provided by the present invention, the addressing modes include: sequential addressing mode, which specifically includes directly mapping the hydraulic support number corresponding to the sequence number in the topology relationship to the power box equipment address; and arithmetic addressing mode, which specifically includes generating an arithmetic sequence address for each power box equipment according to a preset fixed interval value based on the topology relationship.

[0011] According to the coal mine power management system based on power line carrier communication provided by the present invention, the management module is further used to: monitor the working status of each power supply box device in real time; and generate alarm information when an abnormal status is detected.

[0012] According to the coal mine power management system based on power line carrier communication provided by the present invention, the monitoring terminal further includes a network interface module. The network interface module is connected to the electro-hydraulic control system network via industrial Ethernet or fieldbus, and is used to transmit the working status of each power supply box and the alarm information in real time.

[0013] This invention also provides a coal mine power management method based on power line carrier communication, applicable to the aforementioned coal mine power management system based on power line carrier communication, comprising: a monitoring terminal establishing a connection with multiple power supply box devices via power line carrier communication and sending ranging signals to each power supply box device; calculating distance information between the terminal and each power supply box device based on the response signals fed back by each power supply box device; assigning a unique address to each power supply box device according to the distance information; and monitoring and managing each power supply box device based on the assigned unique address.

[0014] This invention provides a coal mine power management system and method based on power line carrier communication. The system includes a monitoring terminal and multiple power supply boxes. The monitoring terminal is connected to each power supply box via a power line. The monitoring terminal includes: a first power line carrier communication module for communicating with each power supply box via power line carrier communication; a ranging module for sending ranging signals to each power supply box and calculating the distance to each power supply box based on the response signals; an addressing module for assigning a unique address to each power supply box based on the calculated distance information; and a management module for managing the power supply based on the unique addresses assigned to each power supply box. The power supply box equipment is monitored and managed; the power supply box equipment includes: a second power line carrier communication module for communicating with the first power line carrier communication module; a response unit for receiving the ranging signal sent by the ranging module and returning a response signal; and an address storage unit for storing the address information assigned by the monitoring terminal. This invention uses power line carrier communication technology to achieve accurate ranging and automatic addressing of the power supply box equipment in the power management system, solving the problems of low efficiency and error-proneness of traditional manual addressing. It provides spatial data support for fault location and power supply optimization, and is particularly suitable for the complex environment of underground coal mines, making the power management system practical. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 is one of the functional structure diagrams of the coal mine power management system based on power line carrier communication provided in an embodiment of the present invention; Figure 2 is another functional structure diagram of the coal mine power management system based on power line carrier communication provided in an embodiment of the present invention; Figure 3 is a flowchart of the coal mine power management method based on power line carrier communication provided in an embodiment of the present invention. Detailed Implementation

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

[0018] Figure 1 is a functional structure diagram of a coal mine power management system based on power line carrier communication provided in an embodiment of the present invention. As shown in Figure 1, the coal mine power management system based on power line carrier communication provided in an embodiment of the present invention includes: a monitoring terminal 110 and multiple power supply box devices 120. The monitoring terminal 110 is connected to each power supply box device 120 via power lines. The monitoring terminal 110 includes: a first power line carrier communication module 1101, used for communicating with each power supply box device based on power line carrier communication; and a ranging module 1102, used for sending ranging signals to each power supply box device and calculating the distance between each power supply box device based on the response signals. The distance between the power supply boxes is specified; an addressing module 1103 is used to assign a unique address to each power supply box device based on the calculated distance information; a management module 1104 is used to monitor and manage the power supply boxes based on the unique addresses assigned to each power supply box device; the power supply box device 120 includes: a second power line carrier communication module 1201 for communicating with the first power line carrier communication module; a response unit 1202 for receiving the ranging signal sent by the ranging module and returning a response signal; and an address storage unit 1203 for storing the address information assigned by the monitoring terminal.

[0019] Traditional power management systems typically use RS485 or CAN bus communication, manually assigning addresses to each power box for data acquisition and device identification. However, the complex environment and wide distribution of equipment in coal mines make manual addressing inefficient and prone to address conflicts or data corruption due to operational errors, severely impacting system reliability.

[0020] The coal mine power management system based on power line carrier communication provided in this invention includes a monitoring terminal and multiple power supply boxes. The monitoring terminal is connected to each power supply box via a power line. The monitoring terminal includes: a first power line carrier communication module for communicating with each power supply box via power line carrier communication; a ranging module for sending ranging signals to each power supply box and calculating the distance to each power supply box based on the response signals; an addressing module for assigning a unique address to each power supply box based on the calculated distance information; and a management module for managing the power supply based on the unique addresses assigned to each power supply box. The power supply box device is monitored and managed. The power supply box device includes: a second power line carrier communication module for communicating with the first power line carrier communication module; a response unit for receiving the ranging signal sent by the ranging module and returning a response signal; and an address storage unit for storing address information assigned by the monitoring terminal. This invention, through power line carrier communication technology, achieves accurate ranging and automatic addressing of the power supply box device in the power management system, solving the problems of low efficiency and error-proneness in traditional manual addressing. It provides spatial data support for fault location and power supply optimization, and is particularly suitable for the complex environment of underground coal mines, making the power management system practical.

[0021] Based on any of the above embodiments, the ranging module is specifically used for: sending a time synchronization message to the target power supply box device via power line carrier, so that the target power supply box device adjusts its local clock according to the received synchronization message and synchronizes with the monitoring terminal; recording the transmission time T1 of the ranging initiation frame and sending the ranging initiation frame to the target power supply box device; receiving the reception time T2 and the transmission time T3 of the ranging response frame sent by the target power supply box device; receiving the ranging response frame and recording the reception time T4 of the ranging response frame; calculating the signal transmission time Δt based on the timestamps T1, T2, T3, and T4, where Δt = [(T4 - T1) - (T3 - T2)]; and calculating the distance d between the monitoring terminal and the target power supply box device based on the signal transmission time, where d = Δt × v / 2, and v is the propagation speed of the signal in the power line.

[0022] In this embodiment of the invention, the monitoring terminal first completes time synchronization with the target node; the monitoring terminal sends a ranging initiation frame to the target node, which contains the sending time. After receiving the ranging initiation frame, the target node calculates the transmission time of the ranging initiation frame based on the sending time and the local receiving time, and thus determines the distance between the monitoring terminal and the target node based on the transmission time.

[0023] In this embodiment of the invention, the ranging module is further configured to: perform multiple ranging measurements on the same target power supply box device, and take the arithmetic mean of the multiple ranging results as the final distance value between the monitoring terminal and the target power supply box device.

[0024] Multiple distance measurements can improve the accuracy of distance measurement and provide effective data support for subsequent calculations.

[0025] Based on any of the above embodiments, the addressing module is specifically used for: the monitoring terminal obtaining the ranging results of each power supply box device through power line carrier communication, the ranging results including device identifiers and corresponding distance values; sorting all power supply box devices in ascending order of distance values; in this embodiment of the invention, the addressing module of the coal mine power management system based on power line carrier communication is further used for: when the distance values ​​are the same, performing secondary sorting of the power supply box devices according to the receiving time of the ranging response frames.

[0026] Each power supply box device is assigned a continuously increasing sequence number after sorting; a topological relationship is constructed based on the mapping relationship between the sequence number and the device identifier; in this embodiment of the invention, the monitoring terminal sorts the results in chronological order according to the ranging results of each target node and the topological characteristics of the power system, and assigns a sequence to each target node to form a topological relationship table.

[0027] The power supply box devices are address-encoded according to the topology and addressing mode.

[0028] In this embodiment of the invention, the addressing modes include: a sequential addressing mode, which specifically includes directly mapping the hydraulic support number corresponding to the sequence number in the topology to the power supply box device address; and an arithmetic progression addressing mode, which specifically includes generating an arithmetic progression sequence address for each power supply box device based on the topology according to a preset fixed interval value.

[0029] In this embodiment of the invention, the addressing operation can be performed on the monitoring terminal (if the monitoring terminal has a human-machine interface) or the host (after the information is uploaded). There are usually two addressing methods: one is to re-address each serial number according to the serial number, and the number here usually corresponds to the hydraulic support number; the other is to set a fixed interval value and address the serial numbers at once in the form of an arithmetic sequence.

[0030] In this embodiment of the invention, the addressing module is further configured to: when a new power supply box device is detected to be connected or an existing power supply box device is removed, re-execute the ranging, sorting and serial number allocation operations to update the topology relationship.

[0031] This invention can achieve adaptive network topology changes, respond in real time to the addition or removal of devices, ensure that the system always maintains the latest topology, automatically trigger the re-ranging mechanism (such as when adding a new device), maintain the timeliness of distance data, ensure address uniqueness, dynamically reclaim the address resources of removed devices, automatically allocate free addresses when a new device is connected to avoid address conflicts, maintain continuous system operation, adopt a non-disruptive update strategy, and the topology reconstruction process does not affect normal monitoring functions, only recalculating the changed parts, thus improving management reliability.

[0032] For example, when 10 new power supply boxes are added to the work area, the system automatically identifies the MAC addresses of the new devices, re-measures distances to establish positional relationships, assigns consecutive addresses according to existing rules (such as continuing the original numbering sequence), and synchronously updates the electro-hydraulic control system topology database. The entire process requires no manual intervention and does not affect the normal monitoring of other equipment.

[0033] Based on any of the above embodiments, the management module is also used to: monitor the working status of each power supply box device in real time; and generate alarm information when an abnormal status is detected.

[0034] In this embodiment of the invention, the monitoring terminal further includes a network interface module, which is connected to the electro-hydraulic control system network via an industrial Ethernet or fieldbus, and is used to transmit the working status of each power supply box and the alarm information in real time.

[0035] In this embodiment of the invention, the monitoring terminal is typically installed before the first power supply box on the working face. The information from the monitoring terminal is directly transmitted to the electro-hydraulic control system network via a network port or bus interface. The monitoring terminal connects to the communication network of the electro-hydraulic control system via a bus or network port, and the information is uploaded through the existing network. This enables automatic addressing of the power system and uploading of information from the power management system, making the power management system practical. It also achieves effective integration of the power management system and the support electro-hydraulic control system, sharing the communication link and solving the problem of the power management system accessing the working face control system.

[0036] As shown in Figure 2, the coal mine power management system architecture based on power line carrier communication provided in this embodiment of the invention adopts a layered distributed structure: Upper layer: monitoring terminal (AC 127VAC power supply) connected to the electro-hydraulic control system via network port / bus; Middle layer: multiple intrinsically safe power modules (carrier communication + 127VAC input); Lower layer: multiple load devices (such as sensors, actuators); simultaneous transmission via 127VAC power supply line. The monitoring terminal simultaneously supports industrial Ethernet and fieldbus (such as CAN / RS485). A typical application scenario is as follows: in a 300-meter-long working face, the power management system can manage up to 200 power nodes, transmit voltage / current data in real time, and support millisecond-level linkage control with the hydraulic support control system via industrial Ethernet.

[0037] This invention provides a coal mine power management system based on power line carrier communication. Employing high-precision time-delay ranging technology and an intelligent topology sorting algorithm, it achieves fully automated addressing of power equipment, significantly improving addressing efficiency and reducing manual operation costs and error rates compared to traditional manual addressing methods. Through power line multiplexing technology, it simultaneously transmits electrical energy and communication signals on 127VAC power lines, saving on the deployment costs of dedicated communication cables and simplifying the complex underground wiring environment. The system's established topology table not only enables equipment identification but also provides accurate spatial references for fault location, improving fault diagnosis efficiency. Deep integration with the electro-hydraulic control system supports real-time data sharing and collaborative control, reducing data transmission latency and providing crucial foundational support for intelligent coal mining.

[0038] The coal mine power management method based on power line carrier communication provided by the present invention will be described below. The coal mine power management method based on power line carrier communication described below can be referred to in correspondence with the coal mine power management system based on power line carrier communication described above.

[0039] Figure 3 is a flowchart of a coal mine power management method based on power line carrier communication provided in an embodiment of the present invention. As shown in Figure 3, the coal mine power management method based on power line carrier communication provided in an embodiment of the present invention includes: Step 301: A monitoring terminal establishes a connection with multiple power supply box devices through power line carrier communication and sends ranging signals to each power supply box device; Step 302: Calculates the distance information between the monitoring terminal and each power supply box device based on the response signals fed back by each power supply box device; Step 303: Assigns a unique address to each power supply box device according to the distance information; Step 304: Monitors and manages each power supply box device based on the assigned unique address.

[0040] The coal mine power management method based on power line carrier communication provided in this invention solves the problems of low efficiency and error susceptibility of traditional manual addressing methods. Through precise time-delay ranging algorithms and intelligent topology sorting, it achieves fully automatic address allocation for power supply box equipment. It innovatively binds equipment physical location information (ranging results) with logical addresses, forming a topology table that not only supports equipment identification but also provides spatial dimension data support for fault location and power supply optimization. Through a dual-mode network interface, it achieves deep integration with the electro-hydraulic control system, reusing existing industrial network resources to reduce deployment costs while ensuring that power status data can participate in real-time collaborative control of the working face. The arithmetic progression addressing mode supports flexible mapping with hydraulic support numbers, enabling the system to adapt to both linear deployment and zoned power supply conditions, resulting in improved actual addressing efficiency.

[0041] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0042] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of software products. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coal mine power management system based on power line carrier communication, characterized in that, include: The system includes a monitoring terminal and multiple power supply boxes. The monitoring terminal is connected to each power supply box via power lines. The monitoring terminal comprises: a first power line carrier communication module for communicating with each power supply box via power line carrier communication; a ranging module for sending ranging signals to each power supply box and calculating the distance to each power supply box based on the response signals; an addressing module for assigning a unique address to each power supply box based on the calculated distance information; and a management module for monitoring and managing the power supply box devices based on the assigned unique addresses. Each power supply box comprises: a second power line carrier communication module for communicating with the first power line carrier communication module; a response unit for receiving the ranging signals sent by the ranging module and returning a response signal; and an address storage unit for storing the address information assigned by the monitoring terminal.

2. The coal mine power management system based on power line carrier communication according to claim 1, characterized in that, The ranging module is specifically used for: sending a time synchronization message to the target power supply box device via power line carrier, so that the target power supply box device adjusts its local clock according to the received synchronization message to synchronize with the monitoring terminal; recording the transmission time T1 of the ranging initiation frame and sending the ranging initiation frame to the target power supply box device; receiving the reception time T2 and the transmission time T3 of the ranging initiation frame sent by the target power supply box device; receiving the ranging response frame and recording the reception time T4; calculating the signal transmission time Δt based on the timestamps T1, T2, T3, and T4, where Δt = [(T4 - T1) - (T3 - T2)]; and calculating the distance d between the monitoring terminal and the target power supply box device based on the signal transmission time, where d = Δt × v / 2, and v is the propagation speed of the signal in the power line.

3. The coal mine power management system based on power line carrier communication according to claim 2, characterized in that, The ranging module is also used to: perform multiple distance measurements on the same target power box device, and take the arithmetic average as the final distance value between the monitoring terminal and the target power box device.

4. The coal mine power management system based on power line carrier communication according to claim 1, characterized in that, The addressing module is specifically used for: the monitoring terminal to obtain the ranging results of each power box device through power line carrier communication, the ranging results including device identifiers and corresponding distance values; sorting all power box devices in ascending order of distance values; and assigning a continuously increasing sequence number to each sorted power box device. A topology relationship is constructed based on the mapping relationship between the serial number and the device identifier; the power supply box device is address-encoded according to the topology relationship and the addressing mode.

5. The coal mine power management system based on power line carrier communication according to claim 4, characterized in that, The addressing module is also used to: re-execute ranging, sorting, and serial number allocation operations to update the topology when a new power supply box device is detected to be connected or an existing power supply box device is removed.

6. The coal mine power management system based on power line carrier communication according to claim 4, characterized in that, The addressing module is also used to: when the distance values ​​are the same, to perform secondary sorting of the power supply box devices according to the order of receiving the ranging response frames.

7. The coal mine power management system based on power line carrier communication according to claim 4, characterized in that, The addressing modes include: sequential addressing mode, which specifically includes directly mapping the hydraulic support number corresponding to the sequence number in the topology relationship to the power supply box device address; and arithmetic progression addressing mode, which specifically includes generating arithmetic progression sequence addresses for each power supply box device based on the topology relationship and according to a preset fixed interval value.

8. The coal mine power management system based on power line carrier communication according to claim 1, characterized in that, The management module is also used to: monitor the working status of each power supply box device in real time; and generate alarm information when an abnormal status is detected.

9. The coal mine power management system based on power line carrier communication according to claim 8, characterized in that, The monitoring terminal also includes a network interface module, which is connected to the electro-hydraulic control system network via industrial Ethernet or fieldbus to transmit the working status of each power supply box and the alarm information in real time.

10. A coal mine power management method based on power line carrier communication, applicable to the coal mine power management system based on power line carrier communication as described in any one of claims 1 to 9, characterized in that, include: The monitoring terminal establishes a connection with multiple power supply box devices through power line carrier communication and sends ranging signals to each power supply box device; The distance information between each power supply unit and the corresponding power supply unit is calculated based on the response signal fed back by each power supply unit; a unique address is assigned to each power supply unit based on the distance information; and each power supply unit is monitored and managed based on the assigned unique address.

Images