Mining substation for optical medium transmission

Abstract

The invention relates to a mining substation for optical medium transmission, and belongs to the field of coal mine control equipment. Single-mode optical fibers are adopted to collect numerical values, information, states and the like of various sensor terminals, rapid communication from sensors to substations is achieved, an optical medium multi-point sensing transmission technology is provided, communication between the substations and the sensor terminal devices through optical signals is achieved, a passive aggregation light splitting technology is adopted, light splitting of the optical signals is achieved, and the communication between the substations and the sensor terminal devices is achieved. And forming an optical tree network. A high-performance processor is adopted to control the integrated transmitting and receiving design of the wavelength of an optical signal, and collision-free transmission of nodes is achieved. Compared with the existing mining substation, the mining substation has the characteristics of higher communication speed, stronger anti-interference capability, fewer system levels, better interconnection and intercommunication mode, more reasonable control logic, more flexible intelligent service development and the like.

Description

Technical Field

[0001] The invention belongs to the field of coal mine control equipment and relates to a mine substation with optical medium transmission. Background Art

[0002] According to the survey of relevant standards, industry giants and field application systems, it is found that the coal mine safety monitoring system currently mainly adopts a four-layer system structure, which is divided into field perception layer, control layer, transmission layer and application layer. The field perception layer is mainly composed of various sensors, control execution equipment, etc.; the control layer is mainly composed of control products such as ordinary substations, comprehensive substations, fusion substations, and regional controllers. The transmission layer is mainly composed of mining switch products, and the application layer is composed of ground center stations, servers, printers and other equipment. The mining substation is mainly based on the "industrial Ethernet ring network + fieldbus" mode, using the construction of a dedicated data format for the entire mine information and a specified path transmission. The application system needs to use private protocols with related equipment through different application software to perform real-time data collection, analysis, cross-control and remote control. The data fusion between different systems needs to be realized through application layer software. The application of fieldbus technology, although the signal of the perception layer is converted from a frequency signal to a data signal with a certain anti-interference ability, the anti-electromagnetic interference ability is always limited, and it cannot fundamentally solve the problem and cannot always meet the application needs of the site. The shortcomings of the existing mining substations mainly exist in the following problems:

[0003] (1) The communication speed and distance are limited, and the system response time cannot be quickly improved;

[0004] (2) The transmission standards have poor compatibility and it is impossible to build a unified transmission network;

[0005] (3) There is a lack of efficient interconnection between device nodes, and the system scalability is poor;

[0006] (4) It is impossible to realize real-time data sharing among multiple systems, the intelligence level is limited, and remote maintenance of equipment cannot be achieved. Summary of the invention

[0007] In view of this, the purpose of the present invention is to provide a mining substation with optical medium transmission, and proposes a method based on optical medium multi-point transmission technology to convert the electrical signal of the substation communication interface into an optical signal for data transmission, so as to realize the communication between the substation and the sensor by optical signal, and solve the problem (1). The passive aggregation and splitting technology of optical signals is adopted to realize passive splitting 1:8-16 optical node communication, form an optical fiber tree network, reduce the number of optical module interfaces, and reduce the power consumption of node equipment, so as to solve the problem (2). A high-performance processor is used to control the wavelength of optical signal transmission and reception to realize an integrated transceiver design, and Ethernet communication technology is used to perform data parsing according to time intervals to realize collision-free transmission of node data. The design idea of ​​planning paths is adopted to plan the communication paths of transmission nodes, open custom shared path channels, and realize independent information interaction between sensors, so as to solve the problems (3) and (4). A system platform based on all-optical transmission is provided, and an open support for intelligent business architecture platform is provided to realize intelligent business development.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] A mining substation for optical medium transmission, comprising:

[0010] The high-tech substation processor connects the ring network switch module, the electric-to-optical module, the control output module, the control feedback module, the storage module, the display module and the Bluetooth wireless module. As the core of the substation, it is responsible for data processing and issuing control instructions.

[0011] Ring network switch module, connected to high-tech substation processor, to achieve network communication with other substations or equipment;

[0012] The electrical-to-optical module connects the high-tech substation processor and the single-mode optical fiber connector to convert electrical signals into optical signals for optical fiber transmission;

[0013] Single-mode fiber connector, connected to the electrical-to-optical module, transmits the optical signal to other substations or devices;

[0014] Control output module, connected to the high-tech substation processor, outputs control instructions to execution devices such as motors, valves, etc.;

[0015] The control feedback module is connected to the high-tech substation processor, receives the feedback signal of the execution device, and transmits the feedback signal to the processor for status monitoring and closed-loop control;

[0016] Storage module, connected to the high-tech substation processor, stores data, programs, etc.;

[0017] Display module, connected to the high-tech substation processor, displays substation status, data and other information;

[0018] Bluetooth wireless module, connected to high-tech substation processor to realize wireless communication function;

[0019] The optical signal passive aggregation splitter module is connected to a single-mode optical fiber connector to perform passive splitting of the optical fiber signal to form a 1:8 to 1:16 optical node. Each optical node is connected through an optoelectronic composite cable to form an optical fiber tree network, which enables communication and power supply of multiple optical nodes, reduces the number of optical module interfaces, and reduces the power consumption of node equipment.

[0020] Ethernet communication module, connected to high-tech substation processor, uses optical module IP and time division multiplexing technology for data transmission, and realizes collision-free transmission of multi-node data;

[0021] The terminal-to-terminal communication module connects the high-tech substation processor and adopts Ethernet multicast and unicast communication technology to realize communication between terminals, and realizes fast data reading and interactive functions through shared memory processing mechanism.

[0022] Furthermore, the optical module communication principle adopts wavelength division multiplexing technology, compares the electrical signal of the processor with the reference electrical signal, controls the laser driver, and drives the laser to emit an optical signal with a wavelength of 1550nm. The laser monitor and bias control feedback control calibrate the optical signal emitted by the laser, thereby realizing the output of the optical signal.

[0023] Furthermore, the optical signal is received by using a 1310nm optical signal detector to collect the 1310nm wavelength optical signal, and the optical signal is amplified and filtered by an optical amplifier and an optical filter. A line driver is used to convert the filtered optical signal into an electrical signal that can be recognized by the processor, thereby controlling the length of the optical signal wavelength to achieve optical communication that integrates transmission and reception, and the communication rate is 2Mpbs.

[0024] Furthermore, the mining substation is provided with a shell, which is made of stainless steel and includes a box cover, a display window, a box body, an LCD screen, a mainboard, a power supply aviation plug, a photoelectric panel and a buzzer; the box cover is placed on the top of the mining substation to protect the internal modules; the box body is connected by a hinge and can be opened and closed for easy maintenance and operation;

[0025] The display window is embedded in the box cover to display the substation status and data information; it is connected to the LCD screen to show the display content on the LCD screen to the user;

[0026] The box body accommodates all internal modules; the box cover is connected by screws to ensure the overall sealing and safety of the substation;

[0027] The LCD screen is located on the front of the mining substation, which is convenient for users to view; it is connected to the mainboard through a flat cable to receive the display information transmitted by the mainboard;

[0028] The mainboard is responsible for data processing and issuing control instructions; it is located inside the mining substation and connects all other modules; it is connected to the LCD screen through cables to transmit display information; it is connected to the ring network switch module, electrical-to-optical module, control output module, control feedback module, storage module or Bluetooth wireless module through other connection methods;

[0029] The power supply aviation plug is used to connect an external power supply to provide power supply for the substation; it is located on the side or back of the mining substation to facilitate the connection of the power cord; it is connected to an external power supply through the plug to supply power to the substation;

[0030] The photoelectric panel converts electrical signals into optical signals, or converts optical signals into electrical signals; it is located inside the mining substation, connecting the mainboard and the single-mode optical fiber connector; it is connected to the mainboard through a flat cable, receives the electrical signals transmitted by the mainboard, and converts them into optical signals for output; it is connected to the single-mode optical fiber connector through an optical fiber connector, and transmits the optical signal to other substations or equipment;

[0031] The buzzer is used to send out sound signals to alert users or to sound an alarm. It is located on the side or back of the mining substation to facilitate sound propagation. It is connected to the main board through a flat cable, receives the alarm signal transmitted by the main board, and sends out a sound.

[0032] The beneficial effects of the present invention are:

[0033] (1) A mine substation with optical medium transmission, which mainly includes a high-tech substation processor, a ring network switch module, an electric-to-optical module, a single-mode optical fiber connector, a control output module, a control feedback module, a storage module, a display module, a Bluetooth wireless module, etc. It has the function of optical signal communication with optical sensors and optical terminal equipment, realizes the communication technology of single-mode optical fiber transceiver, realizes half-duplex communication of optical fiber, and the communication rate can reach 2Mpbs. The optical medium mine substation has full optical communication function.

[0034] (2) An optical medium multi-point transmission technology that uses optical signal wavelength division multiplexing technology, passive aggregation splitting technology and Ethernet IP technology to improve the communication speed of multi-point half-duplex, realize the functions of rapid access of multiple optical sensors on one optical fiber, IP processing and network upload, and solve the problem of mutual limitation between communication speed and distance within a certain range underground.

[0035] (3) The optical medium mining substation forms a tree-shaped network of optical fibers at the terminal of the underground tunnel, reduces the number of optical module interfaces, reduces the power consumption of node equipment, and can increase the number of multi-node loads of the supporting power supply box. The substation optical medium signal transmission has faster communication speed, stronger anti-interference ability, and unified system signal transmission format. This solves the problem of poor compatibility of transmission formats and the inability to build a unified transmission network.

[0036] (4) The optical medium mining substation has the function of data exchange and communication between terminals, plans the communication path of the transmission node, opens a custom shared path channel, and realizes independent information interaction between sensors. The substation also opens a shared memory processing mechanism to realize the fast reading and interaction of data, and provides a foundation for the development of intelligent services (such as online node upgrades and node information synchronization).

[0037] The present invention adopts single-mode optical fiber to collect the values, information and status of various sensor terminals, realizes the rapid communication from sensor to substation, proposes optical medium multi-point sensing transmission technology, realizes the communication between substation and sensor terminal equipment with optical signals, solves the problem that the communication speed and distance are limited and the response time of the system cannot be quickly improved. Passive aggregation spectroscopic technology is adopted to realize the spectroscopic of optical signals, form an optical tree network, reduce the number of optical module interfaces, reduce the power consumption of node equipment, and solve the problem that the transmission system has poor compatibility and cannot build a unified transmission network. The integrated transceiver design that uses a high-performance processor to control the wavelength of the optical signal, adopts Ethernet communication technology, performs data analysis according to time intervals, realizes collision-free transmission of nodes, adopts the design idea of ​​planning paths, plans the communication path of the transmission node, opens a custom shared path channel, realizes independent information interaction between sensors, and solves the problem that there is a lack of efficient interconnection between device nodes, the system has poor scalability and cannot realize real-time data sharing between multiple systems, the intelligence level is limited, and the remote maintenance of equipment cannot be realized. Compared with existing mining substations, transmission mining substations have the characteristics of faster communication speed, stronger anti-interference ability, fewer system levels, better interconnection methods, more reasonable control logic and more flexible intelligent business development.

[0038] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0040] Figure 1 This is the overall schematic diagram of the optical medium mining substation;

[0041] Figure 2 This is a schematic diagram of optical module communication;

[0042] Figure 3 Schematic diagram of spectroscopy;

[0043] Figure 4This is a schematic diagram of the optical medium mining substation communication process;

[0044] Figure 5 It is a schematic diagram of the process of interconnection between terminals;

[0045] Figure 6 This is a structural diagram of the optical medium mining substation.

[0046] Reference numerals: box cover 1, display window 2, box body 3, LCD screen 4, main board 5, power supply socket 6, photoelectric panel 7, buzzer 8. DETAILED DESCRIPTION

[0047] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0048] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0049] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0050] like Figure 1 As shown, a mining substation with optical medium transmission includes a high-tech substation processor, a ring network switch module, an electric-to-optical module, a single-mode optical fiber connector, a control output module, a control feedback module, a storage module, a display module and a Bluetooth wireless module.

[0051] like Figure 2As shown in the figure, optical medium multi-point transmission technology: single-mode optical fiber and optical splitter are used to physically connect multiple sensors on one optical fiber. The optical module communication principle adopts wavelength division multiplexing technology. The electrical signal of the processor is compared with the reference electrical signal to further control the laser driver. The laser driver drives the laser to emit a 1550nm wavelength optical signal. The laser monitor and bias control feedback control calibrate the optical signal emitted by the laser, thereby realizing the output of the optical signal. The optical signal is received by using a 1310nm optical signal detector to collect the 1310nm wavelength optical signal. The optical signal is amplified and filtered by an optical amplifier and an optical filter. The line driver is used to convert the filtered optical signal into an electrical signal that the processor can recognize, thereby controlling the length of the optical signal wavelength to realize optical communication that integrates sending and receiving. The communication rate can reach 2Mpbs. CH4 is a methane sensor, CO is a carbon monoxide sensor, D is a switch terminal, and T is other types of terminals.

[0052] like Figure 3 As shown, passive aggregation and splitting technology of optical signals is adopted to lead the optical fiber and power supply cable out of the substation, and then the split single-channel optical fiber and single-channel electricity are wrapped into a photoelectric composite cable to realize the physical connection of passive splitting 1:8-16 optical nodes and power supply, forming a fiber optic tree network, reducing the number of optical module interfaces, and reducing the power consumption of node equipment.

[0053] Ethernet communication technology and protocol specifications use optical module IP and time division multiplexing technology for data transmission. Sensor nodes perform data analysis according to time intervals to achieve collision-free transmission of multi-node data. That is, one optical module is an IP address, the address center station and the optical module IP perform TCP / IP communication, the sensor terminal is a unique ID address, and communication is performed with a unique ID address. The data frame format of the substation data acquisition is shown in Table 1. The data frame format of the terminal return number is shown in Table 2.

[0054] Table 1

[0055] Frame Header Command word Sensor 1 ID Sensor 2 ID Sensor 3ID Sensor nID 1byte 1byte 4 bytes 4 bytes 4 bytes 4 bytes

[0056] Table 2

[0057] Frame Header Sensor ID data state Check code 1byte 4 bytes 4 bytes 1byte 2 bytes

[0058] The optical medium mine substation communication process diagram is as follows Figure 4As shown. The ground central station and the optical module use TCP / IP communication. The central station directly accesses the terminal data. The time for the central station to send a data packet to the terminal device is T1. The time of T1 is related to the communication speed from the substation to the ground central station, the processing capacity of the substation, and the communication speed from the substation to the terminal device. T2 is the processing and waiting time of the terminal. The processing time is related to the processing capacity of the terminal device and is T4 (terminal processing time). The waiting time is fixed. According to the communication speed of 2Mbps, the communication time of 1byte data is 5us, and the waiting time is 50us (calculated according to 10 times the communication time of 1byte). The waiting time between terminals is T3 (about 50us), that is, the entire communication time is:

[0059] T=2*n*T1+n*T2+n*5us

[0060] Where n represents the number of terminals, T1 is approximately the processing time of the substation, and T2 is the processing time of the terminal. Both substation processing and terminal processing are in the ms level, that is, the communication time is related to the number of connected terminals.

[0061] like Figure 5 As shown in the figure, the communication between terminals adopts Ethernet multicast and unicast communication technology. Multicast communication is used as online heartbeat, status and preset relationship detection to confirm whether the terminal equipment meets the conditions of interconnection. The heartbeat broadcast packet starts the scheduled broadcast heartbeat processing when the interconnection function is enabled. The maximum timing duration of the broadcast packet is appropriate to the system inspection cycle, which can effectively relieve the pressure of the network and meet the system requirements. Unicast communication is a data packet, which is mainly used for fast communication between terminals. At the same time, for the combination logic, the substation also starts the shared memory processing mechanism to realize the fast reading and interaction of data.

[0062] like Figure 6 As shown, the shell of the mining substation is made of stainless steel, with a size of 470mm×409mm×111mm, and mainly includes a box cover 1, a display window 2, a box body 3, an LCD screen 4, a main board 5, a power supply aviation plug 6, a photoelectric panel 7 and a buzzer 8.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A mining substation with optical medium transmission, characterized in that: include: The high-tech substation processor connects the ring network switch module, the electric-to-optical module, the control output module, the control feedback module, the storage module, the display module and the Bluetooth wireless module. As the core of the substation, it is responsible for data processing and issuing control instructions. Ring network switch module, connected to high-tech substation processor, to achieve network communication with other substations or equipment; The electrical-to-optical module connects the high-tech substation processor and the single-mode optical fiber connector to convert electrical signals into optical signals for optical fiber transmission; Single-mode fiber connector, connected to the electrical-to-optical module, transmits the optical signal to other substations or devices; Control output module, connected to the high-tech substation processor, outputs control instructions to execution devices such as motors, valves, etc.; The control feedback module is connected to the high-tech substation processor, receives the feedback signal of the execution device, and transmits the feedback signal to the processor for status monitoring and closed-loop control; Storage module, connected to the high-tech substation processor, stores data, programs, etc.; Display module, connected to the high-tech substation processor, displays substation status, data and other information; Bluetooth wireless module, connected to high-tech substation processor to realize wireless communication function; The optical signal passive aggregation splitter module is connected to a single-mode optical fiber connector to perform passive splitting of the optical fiber signal to form a 1:8 to 1:16 optical node. Each optical node is connected through an optoelectronic composite cable to form an optical fiber tree network, which enables communication and power supply of multiple optical nodes, reduces the number of optical module interfaces, and reduces the power consumption of node equipment. Ethernet communication module, connected to high-tech substation processor, uses optical module IP and time division multiplexing technology for data transmission, and realizes collision-free transmission of multi-node data; The terminal-to-terminal communication module connects the high-tech substation processor and adopts Ethernet multicast and unicast communication technology to realize communication between terminals, and realizes fast data reading and interactive functions through shared memory processing mechanism.

2. The optical medium transmission mining substation according to claim 1, characterized in that: The optical module communication principle adopts wavelength division multiplexing technology, compares the electrical signal of the processor with the reference electrical signal, controls the laser driver, and drives the laser to emit an optical signal with a wavelength of 1550nm. The laser monitor and bias control feedback control calibrate the optical signal emitted by the laser, thereby realizing the output of the optical signal.

3. The optical medium transmission mining substation according to claim 1 is characterized in that: The optical signal is received by using a 1310nm optical signal detector to collect the 1310nm wavelength optical signal, and the optical signal is amplified and filtered by an optical amplifier and an optical filter. A line driver is used to convert the filtered optical signal into an electrical signal that can be recognized by the processor, thereby controlling the length of the optical signal wavelength to realize optical communication that integrates transmission and reception, and the communication rate is 2Mpbs.

4. The optical medium transmission mining substation according to claim 1, characterized in that: The mining substation is provided with a housing made of stainless steel, including a housing cover, a display window, a housing, a liquid crystal screen, a mainboard, a power supply aviation plug, a photoelectric panel and a buzzer; the housing cover is placed on the top of the mining substation to protect the internal modules; The box is connected by hinges and can be opened and closed, which is convenient for maintenance and operation; The display window is embedded in the box cover to display the substation status and data information; it is connected to the LCD screen to show the display content on the LCD screen to the user; The box body accommodates all internal modules; the box cover is connected by screws to ensure the overall sealing and safety of the substation; The LCD screen is located on the front of the mining substation, which is convenient for users to view; it is connected to the mainboard through a flat cable to receive the display information transmitted by the mainboard; The mainboard is responsible for data processing and issuing control instructions; it is located inside the mining substation and connects all other modules; it is connected to the LCD screen through cables to transmit display information; it is connected to the ring network switch module, electrical-to-optical module, control output module, control feedback module, storage module or Bluetooth wireless module through other connection methods; The power supply aviation plug is used to connect an external power supply to provide power supply for the substation; it is located on the side or back of the mining substation to facilitate the connection of the power cord; it is connected to an external power supply through the plug to supply power to the substation; The photoelectric panel converts electrical signals into optical signals, or converts optical signals into electrical signals; it is located inside the mining substation, connecting the mainboard and the single-mode optical fiber connector; it is connected to the mainboard through a flat cable, receives the electrical signals transmitted by the mainboard, and converts them into optical signals for output; it is connected to the single-mode optical fiber connector through an optical fiber connector, and transmits the optical signal to other substations or equipment; The buzzer is used to send out sound signals to alert users or to sound an alarm. It is located on the side or back of the mining substation to facilitate sound propagation. It is connected to the main board through a flat cable, receives the alarm signal transmitted by the main board, and sends out a sound.

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