KR100779597B1 - Optical data transmission system with transmission recovering function in disconnection of energy lan data transmission - Google Patents

Abstract

The present invention is dedicated to connecting each system by registering the electricity, gas, water, steam, etc. generated and used during the process in each plant in the steel mill in the corresponding plant control system (3, 4, 5, 6, 7, 9) It is connected to a LAN (9) to perform a comprehensive monitoring and control of utilities (electricity, gas, water, steam), etc. generated in steel mills with the final operation screen (8), and also perform performance management on generation and use. It is a device that connects the optical cable of the dedicated LAN (9) section and each control system (3,4,5,6,7,9) to the master transmission line (1) or slave in the redundant dedicated LAN (9) section. Transmission path (2) In case of transmission line abnormality, data error detection circuit (117) (118) is driven to switch the line to perform communication function, and it is related with optical transmission device having recovery function when recovering line. By subdividing the trouble spot tracking in case of section, system section and optical transmission section abnormality Provides optical transmission device with recovery function in case of disconnection of energy LAN data transmission line that can be quickly recovered by clear facility diagnosis and stable supply and supply of electricity, gas, water and steam generated and used in each steel mill. do.

Description

OPTICAL DATA TRANSMISSION SYSTEM WITH TRANSMISSION RECOVERING FUNCTION IN DISCONNECTION OF ENERGY LAN DATA TRANSMISSION}

1 is a schematic diagram of a general steel mill utility management system;

2 is a configuration diagram of a connection between a conventional system and a data LAN;

3 is a connection diagram of a conventional data switching device;

4 is a block diagram of an optical transmission apparatus having a recovery function when an energy LAN data transmission line is disconnected according to the present invention;

Fig. 5 is a data abnormality detection circuit diagram in the case of disconnection of the master line in the present invention;

6 is a data abnormality detection circuit diagram when a slave line is disconnected in the present invention;

7 is a circuit diagram of a power supply device for data protection during power failure in the present invention;

Fig. 8 is a general configuration diagram of an optical transmission device system having a recovery function of a transmission line switching circuit of the present invention.

Explanation of symbols on the main parts of the drawings

1: Master transmission path 2: Slave transmission path

21,22,51,52,54,55: Optical cable 23,25: All-optical converter

24,26: photoelectric converter 31,32,33,34: coaxial cable                 

42: data transfer card 44,44a: bypass unit

45,45a: Control system 66: Loopback switch

107: line recovery switch 112 (1b) (2b): switch

117,118: data abnormality detection circuit 121,130: transistor

121,130: transistor 122,129: resistor

123: NOT GATE 125: relay

125 (1a) (1b): switch contact 125 (2b): switch contact

127: diode 128: relay

128 (1a) (1b): switch contact 128 (2b): switch contact

The present invention registers electricity, gas, water, steam, etc. generated and used during the process in each plant in the steel mill to the corresponding plant control system, and is connected to a dedicated LAN connecting the respective systems. It is a device that monitors (electricity, gas, water, steam), etc. comprehensively and performs performance management on generation and use, and also connects the dedicated LAN section to the optical cable and each system. (MASTER) Transmission line or slave (SAVE) transmission line section In case of transmission line abnormality, data error detection circuit is driven to switch communication to perform communication function, and especially to optical transmission device having recovery function when recovering line. By subdividing the tracking of failure points in case of abnormal transmission line section, system section and optical transmission section, it is possible to quickly recover with clear facility diagnosis. Steelworks relates to an optical transmission device that combines the generated and used electric, be a gas, water, steam stably and energy distributions when the LAN (LAN) data transmission line disconnection recovery function can be managed by each plant.

1 is a diagram of a general steelworks utility management system, FIG. 2 is a diagram illustrating a connection between a conventional system and a data LAN, and FIG. 3 is a diagram illustrating a connection between a conventional data converter. The data collected by the facilities, such as power generation, the transmission unit (41) through the transmission cable (41) and the transmission unit (40) by performing the transmission and reception of the control signal to determine whether the data is normal in the data transmission card 42 of each system It is supposed to transmit a signal to.

In addition, the data transmission card 42 drives the relay when the circuit abnormality is determined to operate the master switching switch 61 or the slave switching switch 64 of the bypass unit 44 so as to stably perform the abnormal line. In case of abnormality, the master changeover switch 61 is switched to the bypass unit 44, which is a separate changeover unit, by using the signal detected by the data transfer card 42 and the slave transfer switch 65 when the master transfer path 1 fails. ), The abnormal section is switched and the slave transmission path (2) section of the front end is disconnected, so that the relative data transmission card 42 switches the corresponding system slave switching switch 64 and the slave transmission switch 65. The signal input to the optical cable 22 is turned off and then transmitted to the slave transmission path 2 of the optical cable 23 to perform monitoring and control of electricity, gas, water and steam generated and used in the blast furnace and gas. Done .                         

In addition, the optical conversion unit 43 is a master transmission optical cable 52 and a slave transmission optical cable 21 by an all-optical converter 23, 25 for converting data transmitted and received in the bypass unit 44 from the electrical signal to light. ) Transmits data and converts these optical signals into electrical signals in photoelectric converters 24 and 26, and activates relays during signal processing and line break in the data transmission card 42 through the bypass unit 44. Will be done. The former relay contact forces the loopback switch 66 to operate when the circuit is switched over by the bypass unit 44 to recover the transmission line forcibly in the repaired section.

The data transmission card 42 as described above operates the system by switching the switch to the bypass unit 44 at the time of disconnection of the signal processing and control system.

The bypass unit 44 is a slave send 35, a master receive 36, a master send 37, a slave receive Slave reception (27), master transmission (28), master reception (29), slab on the optical conversion unit (43) side in the section of coaxial cable (34) (33) (32) (31) through (38). It is connected to the section of the eve transmission (30) to perform the circuit switching function when the signal transmission and the transmission of the line abnormality from the data transmission card (42).

The optical conversion unit 42 is connected to the master optical cable 21 and the optical cable 52 on the slave side in the all optical converters 23 and 25 to transfer data transmitted and received as an electrical signal from the bypass unit 44. The optical signals of the optical cables 22 and 51 are converted into electrical signals through the optical converters 24 and 26 and processed by the transmission data transmission card 42 to the bypass unit 44.

In this series of transmission process, the data transmission card 42, bypass unit 44 optical / electric, electrical / optical converter, and optical conversion unit 43 are separated into separate devices and functions. In the event of a system malfunction, the operator checks the data transmission card (42) section in sequence. → Bypass unit (44) section check → Optical conversion unit (43) and checks the optical cable for the line abnormality point connecting the section. When repairing an abnormal point, it is necessary to take a long time to recover the system by checking the multi-stage section, and to check the data transmission card 42 section, the system should be stopped and checked. There is a problem that can not monitor and control the occurrence and use.

The present invention has been made to solve the above problems, and automatically detects the line break in the data abnormality detection circuit when the line break occurs in the monitoring system for electricity, gas, water and steam generated and used in steel mills. It is operated stably without system down by switching to slave in case of master abnormality, and it is easy to trace the trouble spot even when checking and repairing abnormal section.Reducing recovery time and recovering circuit in the field by using circuit recovery switch when recovering In addition, in case of power failure of the corresponding section system, the power supply for data protection is automatically operated in case of power failure, and it has a recovery function in case of disconnection of the energy LAN data transmission line, which enables the front and rear systems to perform the monitoring control function stably. The object is to provide an optical transmission device.

As a technical means for achieving the above object, the present invention provides a master circuit portion and a slave circuit portion for transmitting data when the transmission line section is normal, a data abnormality detection circuit portion for detecting and processing a circuit when the master circuit is disconnected, and a slave. An apparatus comprising a data abnormality detection circuit unit for detecting and processing a line when a line is disconnected, a line recovery switch unit for restoring a transmission path section when a line is restored in the field, and a line connection unit for protecting the front and rear end systems during a power failure.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

The present invention includes a master circuit portion and a slave circuit portion for transmitting data when the transmission path section is normal, wherein the master circuit portion converts the signal input from the optical cable 22 of FIG. 4 into an electrical signal in the photoelectric converter 24. 5 through the switch contact 125 of FIG. 5 at the master reception 101 and received at the data transmission card 42 via the data reception 103 line, and the corresponding plant and utility (electricity, gas, water, steam). After the signal processing 42 for the new information, the normal operation and the disconnection switching operation are performed according to the position of the switch contact 128 in Fig. 6 of the data transmission 104. Through the relay non-contact point 128 (1b), the electrical signal is converted into the optical signal in the all-optical converter 25 through the master transmission 106 line and then transmitted as the optical signal to the next system through the optical cable 52. .

The slave circuits 111 and 116 transmit only the check signal from the all-optical converter 23 to the optical cable 21 without transmitting data. When the master transmission path is abnormal, the line is switched to stabilize the data transmission at the abnormal place. Will be performed. The optical signal received from the optical cable 51 is converted into an electrical signal by the photoelectric converter 26, and the switch contacts 125 (2b) and 128 (2b) are normally turned on through the slave receiving 111 line. Is connected to the slave transmission line 116 is connected to the optical converter 23 to convert the electrical signal into an optical signal to monitor the transmission slave line of the front end system through the optical cable 21.

The master side fault discrimination circuit unit is connected to the master fault 101 circuit in the data fault detection circuit 117 connected to the master fault 101 circuit in case of disconnection of the data from the optical cable 22. When connected to the data abnormality detection circuit 117, the slave receiving 111 is automatically connected.

In the slave abnormality determining circuit, the switch contact 128 (1a) of the data abnormality detecting circuit 118 connected to the slave receiving 111 line is disconnected when the data is disconnected from the optical cable 51. 104 is automatically connected to the slave transmission 116 when the data error detection circuit 118 operates.

The master data abnormality detection circuit 117 of FIG. 6 is coupled to the master reception 101, and the signal 101 applies a current to the base for driving the transistor 121. A resistor 122 and a resistor 129 are connected to the positive voltage 120 for protection of the transistors 121 and 130. The transistor 121 has a current flowing from the collector C to the emitter E so that a nat gate ( NOT GATE) 123 to operate. The capacitor 124 is coupled to the emitter E and the nat gate 123 of the transistor 121 and used for removing AC components, that is, noise. The transistor 130 is coupled to the resistor 129 and the relay 125 of FIG. 5, and is coupled to the relay 128 of FIG. 6 during slave line switching. The transistor 130 is coupled to the resistor 129 and the relay 125 of FIG. 5, and is coupled to the relay 128 of FIG. 6 during slave line switching. When the transistor 130 base voltage is applied, a voltage is applied from the collector C to the emitter E to operate the relay 125 and the internal moving coil 126 of the relay 128 to thereby relay 125 (1a) and 1b. 2b) and the relay 128 (1a) (1b) (2b).

The circuit recovery switch 107 of Fig. 4 is connected to the data transmission 104 of the data transmission card 42, and when the circuit recovery switch 107 is pressed, the master transmission 106, the all-optical converter 25, the optical cable 52 When the circuit is repaired after the repair of the line, a forced signal is sent to restore the data abnormality detection circuits 117 and 118 to switch the line to the master.

The circuit connection part of FIG. 7 is supplied with the battery pack while the relay 112 (3b) connected to the power supply terminal is operated during power failure, and supplies the power of FIG. 4 to supply the power of the master circuit protection relay 112 (2b), slab. Even when the EVE line protection relay 112 (1b) is operated and the data transmission device 42 is down, the optical transmission device 100 having a recovery function in the event of disconnection of the energy LAN data transmission line is stabilized to protect the front and rear end systems of FIG. Done.

 The master line protection relay 112 (2b) is coupled to the master reception 101 and the master transmission 106 and turned off when the main power is supplied, and turned on when a power supply abnormality occurs.

The slave line protection relay 112 (1b) is coupled to the slave reception 111 and the slave transmission 116 to be turned off when the main power is supplied and turned on when a power supply abnormality occurs.

Referring to the operation of the present invention configured as described above are as follows.

The circuit switching process when an abnormality occurs in the section of the blast furnace control system 3 and the gas control system 4 of FIG. 8 when the abnormality occurs in the optical cable 52 of FIG. The signal is transmitted to the data transmission 104 after signal processing by the data transmission card 42 through the data abnormality detection circuit 101 and the master reception 102 line after conversion into an electrical signal at 24, and the master transmission. The optical signal is converted into the optical signal in the optical converter 25 through the line, and the optical cable 52 transmits the optical signal to the optical transmission device 100 having a recovery function in case of disconnection of the energy LAN data transmission line of the next station. .

In the system, the input signal is processed as described above, and then takes a structure in which a transmission method is connected to the next system.

The master and slave switching process will be described in detail. In the event of signal disconnection while receiving data from the master side, the base power is cut off from the collector 121 in the data error detection circuit 117 of FIG. Since it is not applied, the nat gate 123 is turned on so that a current is applied from the collector of the transistor 130 to the emitter so that the relay 125 operates. The switch contact 125 (1b) of FIG. The circuit is switched to 1a)) and the switch contact 125 (2b) is turned off to block the slave transmission line in slave reception. After switching the master transmission line of the gas control system 4, the signal processing is received by the optical cable 54 of FIG. 2 and then converted into optical / electrical conversion and passes through the slave receiving 111 line and the switch contact 125 (1a). After the signal is processed by the data transmission card 42 through the data reception 103, the signal is normally transmitted to the optical cable 55 after the switch contact 128 (1b) and the master transmission 106 before and after the optical conversion. .

In the slave transmission path switching, the switch contact 125 (2b) is turned off due to an abnormal master transmission path, and the slave receiving data is cut off in the blast furnace control system 3 of FIG. 8, so that the data abnormality detection circuit 118 of FIG. Since the base power is cut off from the transistor 121 and no current is applied from the collector to the emitter, the nat gate 123 is turned on so that the current is applied from the collector of the transistor 130 to the emitter, thereby relaying 128. Operation The switch contact 128 (1b) in Fig. 4 switches the line to the switch contact 128 (1a) and the switch contact 128 (1b) is turned off so that slave reception is not slave-transmitted. The slave receiving line of the blast furnace control system 3 of FIG. 8 is switched so that the signal processing is optically / electrically converted after normal reception by the optical cable 22 of FIG. 2, and the master receiving 101 line and the switch contact 125 (1b). After passing through)), the data transmission card (42) through the data transmission card 42 after the signal processing through the switch contact (128 (1a)), the slave contact (116) connected to the data transmission 104, the total / optical conversion After transmitting the optical signal of the optical cable 21 to the slave transmission line through the slave transmission and reception of the system before the system finally receives from the slave line in the gas control system 4 and transmits the data to the master transmission line after processing Is stable.

In addition, after repairing the abnormality of the gas control system section in the transmission blast furnace control system 3, when the system is normally restored, press the line recovery switch 107 at the master side of the gas control system 4 to the circuit break. By forcibly sending a signal to the data error detection circuits 117 and 118 switched by the switch, the system is stably operated while the switch switched at the time of the circuit error is normally recovered.

8 shows the transmission line switching circuit recovery to the blast furnace control system 3, the gas control system 4, the steelmaking control system 5, the power generation control system 6, the operation screen 8, and the plurality of control systems 7. This is a system configuration having an optical transmission device having a function, and the circuit switching state when the master transmission path (1) or the slave transmission path (2) in the gas control system (4) section and the blast furnace control system (3) section is abnormal After the input from the master receiving side, the data transmission card 42 processes the data and transmits the signal from the master transmitting side to the gas control system 4, and when the section is disconnected, the master receiving data is received from the blast furnace control system 3 at the slave receiving point. The gas control system 4 is cut off from the slave and the signal transmission is transmitted to the transmission cable 55 from the master transmission. In the blast furnace control system 3, the slave reception transmission line of each system is received. Finally through steelmaking The signal is transmitted from the optical cable 54, which is the slave transmission side of the subsystem 5, and the gas control system 4 receives the data from the slave receiving side and processes the data from the data transmission card 42 after the master transmission optical. The signal is normally processed through the cable 55.

In addition, when the line recovery of the gas control system 4 and the blast furnace control system 3 is performed, the line recovery switch 107 of the gas control system section is pressed to recognize the line normally in the data error detection circuit to detect the data error detection circuit 117. The relay 125 is stopped by applying the base voltage of the transistor 121 by applying the base voltage of the transistor 121 of FIG. 4 and the switch contact 125 (1b) is normally restored from the switch contact 125 (1a) of FIG. 4. The blast furnace control system 3, in which the switch contact 125 (1b) is turned on and the slave transmission path 2 is switched, applies a transistor 121 base voltage of the data abnormality detection circuit 118 of FIG. The relay 128 is stopped by shutting off the base power supply 130. The switch contact 128 (1b) is normally restored from the switch contact 128 (1a) of FIG. 4, and the switch contact 128 (1b) is turned on and the master is turned on. And the slave transmission path 2 is switched to normal.

When the power supply abnormality switch 112 of FIG. 7 is turned off, the optical transmission apparatus 100 having a recovery function at the time of disconnection of the energy LAN data transmission line is supplied with power by the switched switch 112 (3b). Although down, the switch 112 (1b) of FIG. 4 is turned on to operate the master transmission path 1 normally, and the switch 112 (2b) is turned on so that the slave transmission path 2 also operates normally.

Therefore, according to the present invention as described above, when the line disconnection occurs in the monitoring system for the utility such as electricity, gas, water, steam generated and used in the steel mill, the data abnormality detection circuit 117 (118) system detects the line disconnection By switching the master and slave of the corresponding section system, it is possible to prevent downtime of utility supply and operation stop of the plant, which contributes to stabilization of utility supply of steel mills and contributes to the stable operation and reliability of each plant.

In addition, when checking and repairing abnormal sections, it is easy to trace abnormal points and can take quick measures, thereby reducing maintenance costs and reducing maintenance time. Also, the relay switch 112 connected to the power supply terminal is automatically operated even when the corresponding section system is out of power. It is turned on so that stable monitoring control of the front and rear end systems can be performed.

Claims (1)

Detects and processes the master circuit section and slave circuit section for transmitting data when the transmission path section is normal, the data abnormality detection circuit section 117 for detecting and processing the circuit at the time of disconnection of the master circuit, and the line at the time of disconnection of the slave circuit. An energy LAN comprising a data abnormality detection circuit 118, a line recovery switch 107 for restoring a transmission path section when a line is restored in the field, and a line connection for protecting the front and rear end systems in case of power failure. Optical transmission device with recovery function in case of disconnection of data transmission line.

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