Monitoring screen control system and its control method, distributed control system

Abstract

This invention discloses a monitoring screen control system and its control method, as well as a distributed control system. The monitoring screen control system includes a keyboard and mouse signal switching controller, at least one keyboard and mouse signal transmitter, at least one first keyboard and mouse signal receiver, and at least one second keyboard and mouse signal receiver. This system allows control room operators in a DCS system to directly control the monitoring screen using a console, greatly increasing the convenience and stability of operator operation on the monitoring screen within the DCS system. It also solves the problems of network bandwidth consumption and information security impacts inherent in traditional implementations. The system's hardware structure is simple and effective, possessing significant engineering application value.

Description

Technical Field

[0001] This invention belongs to the field of industrial control technology, specifically relating to a monitoring screen control system and its control method, and a distributed control system. Background Technology

[0002] For the operation and control center system of DCS (Distributed Control System), operators need to switch and retrieve the monitoring screen of DCS system operation status and data displayed in the control room to facilitate viewing by operators and system operation and maintenance personnel. Thermal power, nuclear power, coal, petroleum, chemical and rail transit fields all need to retrieve and switch the monitoring screen of DCS system operation status and data. There are two traditional control methods. One is to use the remote connection function of the operator's workstation to control the monitoring screen workstation, thereby changing the human-machine interface output of the monitoring screen workstation to switch the human-machine interface on the monitoring screen. This is especially true for current workstation systems, which are mostly based on Windows systems. Generally, the remote connection function of Windows system is used to achieve the above purpose. However, for the sake of information security of DCS system, network devices in DCS system have gradually canceled or disabled remote connection or remote control functions. At the same time, remote connection or remote control functions will also consume system network bandwidth, thereby affecting the real-time data transmission of the entire DCS system. Moreover, under network failure conditions, the operator will directly lose the ability to switch the human-machine interface on the monitoring screen. The other method is for maintenance personnel to bring a keyboard, mouse and monitor into the computer room and connect to the monitoring screen workstation locally to switch or extract the human-machine interface. However, this method is cumbersome and requires interruption of the human-machine interface output of the monitoring screen during the execution.

[0003] The two traditional control methods have significant limitations. Therefore, DCS systems in the above-mentioned fields need to provide an independent monitoring screen control system and control method. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art, such as the inconvenience of the operation of the control room operator and the limitation of network bandwidth and information security requirements, and to provide a monitoring screen control system and its control method, and a distributed control system.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] In a first aspect, a monitoring screen control system is provided, including a keyboard and mouse signal switching controller and at least one keyboard and mouse signal transmitter, at least one first keyboard and mouse signal receiver and at least one second keyboard and mouse signal receiver;

[0007] The keyboard and mouse signal transmitter is connected to the corresponding operator console, and is used to receive keyboard and mouse signals sent by the operator console, convert the keyboard and mouse signals into corresponding communication signals, and send the communication signals to the keyboard and mouse signal switching controller;

[0008] The keyboard and mouse signal switching controller is used to forward the received communication signal to the corresponding first keyboard and mouse signal receiver or the corresponding second keyboard and mouse signal receiver according to external instructions;

[0009] The first keyboard and mouse signal receiver is connected to the corresponding operator workstation and is used to convert the received communication signal into the corresponding keyboard and mouse signal and send the keyboard and mouse signal to the operator workstation;

[0010] The second keyboard and mouse signal receiver is connected to the corresponding monitoring screen workstation and is used to convert the received communication signal into the corresponding keyboard and mouse signal and send the keyboard and mouse signal to the monitoring screen workstation, wherein the monitoring screen workstation is used to output video signal to the corresponding monitoring screen.

[0011] Preferably, all operator workstations are located on the same network as the keyboard and mouse signal switching controller, which is used to receive external commands sent by any operator workstation.

[0012] Preferably, the first operator workstation and the keyboard and mouse signal switching controller are located in the same network, wherein the first operator workstation is any one of all operator workstations; the first operator workstation is used to send external instructions to the keyboard and mouse signal switching controller, and to receive external instructions sent by the second operator workstation and forward the external instructions to the keyboard and mouse signal switching controller, wherein the second operator workstation is any operator workstation other than the first operator workstation; the keyboard and mouse signal switching controller is used to receive the external instructions sent by the first operator workstation.

[0013] Preferably, all monitoring screen workstations are located on the same network as the keyboard and mouse signal switching controller, which is used to receive external commands sent by any monitoring screen workstation.

[0014] Preferably, the first monitoring screen workstation and the keyboard and mouse signal switching controller are located in the same network, wherein the first monitoring screen workstation is any one of all monitoring screen workstations; the first monitoring screen workstation is used to send external instructions to the keyboard and mouse signal switching controller, and to receive external instructions sent by the second monitoring screen workstation and forward the external instructions to the keyboard and mouse signal switching controller, wherein the second monitoring screen workstation is any monitoring screen workstation other than the first monitoring screen workstation; the keyboard and mouse signal switching controller is used to receive the external instructions sent by the first monitoring screen workstation.

[0015] Preferably, the keyboard and mouse signal transmitter is specifically used to convert the keyboard and mouse signals into corresponding communication signals according to a preset communication protocol, the first keyboard and mouse signal receiver is specifically used to convert the received communication signals into corresponding keyboard and mouse signals according to the preset communication protocol, and the second keyboard and mouse signal receiver is specifically used to convert the received communication signals into corresponding keyboard and mouse signals according to the preset communication protocol.

[0016] Preferably, the operator workstation is used to output video signals to the display of the corresponding operator console.

[0017] Secondly, a control method for a monitoring screen control system is provided, wherein the monitoring screen control system is the monitoring screen control system described in the first aspect, and the control method includes the following steps:

[0018] The keyboard and mouse signal transmitter receives keyboard and mouse signals sent by the corresponding operator console, converts the keyboard and mouse signals into corresponding communication signals, and sends the communication signals to the keyboard and mouse signal switching controller;

[0019] The keyboard and mouse signal switching controller forwards the received communication signal to the corresponding first keyboard and mouse signal receiver or the corresponding second keyboard and mouse signal receiver according to the external instruction;

[0020] If the first keyboard and mouse signal receiver receives the communication signal, it converts the communication signal into a corresponding keyboard and mouse signal and sends the keyboard and mouse signal to the operator workstation.

[0021] If the second keyboard and mouse signal receiver receives the communication signal, it converts the communication signal into a corresponding keyboard and mouse signal and sends the keyboard and mouse signal to the monitoring screen workstation.

[0022] Preferably, all operator workstations and the keyboard and mouse signal switching controller are located on the same network; the control method further includes the following steps:

[0023] The keyboard and mouse signal switching controller receives external commands sent by any operator workstation.

[0024] Preferably, the first operator workstation and the keyboard and mouse signal switching controller are located in the same network, wherein the first operator workstation is any one of all operator workstations;

[0025] The control method further includes the following steps:

[0026] The first operator workstation sends an external command to the keyboard and mouse signal switching controller, or receives an external command sent by the second operator workstation and forwards the external command to the keyboard and mouse signal switching controller, wherein the second operator workstation is the operator workstation other than the first operator workstation among all operator workstations; the keyboard and mouse signal switching controller receives the external command sent by the first operator workstation.

[0027] Preferably, all monitoring screen workstations and the keyboard and mouse signal switching controller are located on the same network; the control method further includes the following steps:

[0028] The keyboard and mouse signal switching controller receives external commands sent by any monitoring screen workstation;

[0029] Preferably, the first monitoring screen workstation and the keyboard and mouse signal switching controller are located in the same network, wherein the first monitoring screen workstation is any one of all monitoring screen workstations;

[0030] The control method further includes the following steps:

[0031] The first monitoring screen workstation sends an external command to the keyboard and mouse signal switching controller, or receives an external command sent by the second monitoring screen workstation and forwards the external command to the keyboard and mouse signal switching controller; wherein, the second monitoring screen workstation is any monitoring screen workstation other than the first monitoring screen workstation; the keyboard and mouse signal switching controller receives the external command sent by the first monitoring screen workstation.

[0032] Preferably, the step of the keyboard and mouse signal transmitter converting the keyboard and mouse signals into corresponding communication signals specifically includes: the keyboard and mouse signal transmitter converting the keyboard and mouse signals into corresponding communication signals according to a preset communication protocol;

[0033] The step of the first keyboard and mouse signal receiver converting the received communication signal into the corresponding keyboard and mouse signal specifically includes: the first keyboard and mouse signal receiver converting the received communication signal into the corresponding keyboard and mouse signal according to the preset communication protocol;

[0034] The step of the second keyboard and mouse signal receiver converting the received communication signal into the corresponding keyboard and mouse signal specifically includes: the second keyboard and mouse signal receiver converting the received communication signal into the corresponding keyboard and mouse signal according to the preset communication protocol.

[0035] Thirdly, a distributed control system is provided, including at least one operator console, at least one operator workstation, at least one monitoring screen, at least one monitoring screen workstation, and the monitoring screen control system described in the first aspect.

[0036] The significant advantages of this invention are as follows: It provides a monitoring screen control system and its control method, as well as a distributed control system. By using this monitoring screen control system, when an external command instructs the keyboard and mouse signal switching controller to forward communication signals to the first keyboard and mouse signal receiver, the operator in the control room can use the keyboard and mouse on the console to control the operator workstation, thereby controlling the display content on the monitor. When an external command instructs the keyboard and mouse signal switching controller to forward communication signals to the second keyboard and mouse signal receiver, the operator in the control room can use the keyboard and mouse on the console to control the monitoring screen workstation, thereby controlling the display content on the monitoring screen. This greatly increases the convenience and stability of operator operation of the monitoring screen in the DCS system, while solving the problems of network bandwidth consumption and information security impacts in traditional implementations. The hardware structure of this monitoring screen control system is simple and effective, and it has significant engineering application value. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the connection structure of the monitoring screen control system provided in Embodiment 1 of the present invention.

[0038] Figure 2 This is a first network connection diagram of the operator workstation and the keyboard and mouse signal switching controller provided in Embodiment 1 of the present invention.

[0039] Figure 3 This is a second network connection diagram of the operator workstation and the keyboard and mouse signal switching controller provided in Embodiment 1 of the present invention.

[0040] Figure 4 This is a structural diagram of a distributed control system provided in Embodiment 3 of the present invention. Detailed Implementation

[0041] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0042] Example 1

[0043] This embodiment discloses a monitoring screen control system, such as... Figure 1As shown, it includes a keyboard and mouse signal switching controller, at least one keyboard and mouse signal transmitter, at least one first keyboard and mouse signal receiver, and at least one second keyboard and mouse signal receiver;

[0044] The keyboard and mouse signal transmitter is connected to the corresponding operator console, and is used to receive keyboard and mouse signals sent by the operator console, convert the keyboard and mouse signals into corresponding communication signals, and send the communication signals to the keyboard and mouse signal switching controller;

[0045] The keyboard and mouse signal switching controller is used to forward the received communication signal to the corresponding first keyboard and mouse signal receiver or the corresponding second keyboard and mouse signal receiver according to external instructions;

[0046] The first keyboard and mouse signal receiver is connected to the corresponding operator workstation and is used to convert the received communication signal into the corresponding keyboard and mouse signal and send the keyboard and mouse signal to the operator workstation;

[0047] The second keyboard and mouse signal receiver is connected to the corresponding monitoring screen workstation and is used to convert the received communication signal into the corresponding keyboard and mouse signal and send the keyboard and mouse signal to the monitoring screen workstation, wherein the monitoring screen workstation is used to output video signal to the corresponding monitoring screen;

[0048] Using the aforementioned monitoring screen control system, any operator console can control any monitoring screen workstation with its keyboard and mouse.

[0049] Communication signals are transmitted between the keyboard and mouse signal transmitter and the keyboard and mouse signal switching controller, and between the keyboard and mouse signal switching controller and the first and second keyboard and mouse signal receivers, via optical fiber or network cable. For example, optical fiber transmission can be used for long distances, and network cable transmission can be used for short distances.

[0050] In one alternative implementation, all operator workstations are located on the same network as the keyboard and mouse signal switching controller, such as... Figure 2 As shown, each operator workstation and the keyboard and mouse signal switching controller are connected to the same network via a switch. The keyboard and mouse signal switching controller is used to receive the external commands sent by any operator workstation.

[0051] In one optional implementation, the first operator workstation and the keyboard and mouse signal switching controller are located on the same network, such as... Figure 3As shown, the first operator workstation is any one of all operator workstations; the first operator workstation is used to send external instructions to the keyboard and mouse signal switching controller, and to receive external instructions sent by the second operator workstation and forward the external instructions to the keyboard and mouse signal switching controller, wherein the second operator workstation is any operator workstation other than the first operator workstation; the keyboard and mouse signal switching controller is used to receive the external instructions sent by the first operator workstation.

[0052] In one alternative implementation, all monitoring screen workstations are located on the same network as the keyboard and mouse signal switching controller, which is used to receive external commands sent by any monitoring screen workstation.

[0053] In one optional implementation, the first monitoring screen workstation and the keyboard and mouse signal switching controller are located in the same network, wherein the first monitoring screen workstation is any one of all monitoring screen workstations; the first monitoring screen workstation is used to send external instructions to the keyboard and mouse signal switching controller, and to receive external instructions sent by the second monitoring screen workstation and forward the external instructions to the keyboard and mouse signal switching controller, wherein the second monitoring screen workstation is any monitoring screen workstation other than the first monitoring screen workstation; the keyboard and mouse signal switching controller is used to receive the external instructions sent by the first monitoring screen workstation.

[0054] In one optional implementation, the keyboard and mouse signal transmitter is specifically used to convert the keyboard and mouse signals into corresponding communication signals according to a preset communication protocol, the first keyboard and mouse signal receiver is specifically used to convert the received communication signals into corresponding keyboard and mouse signals according to the preset communication protocol, and the second keyboard and mouse signal receiver is specifically used to convert the received communication signals into corresponding keyboard and mouse signals according to the preset communication protocol.

[0055] In one alternative implementation, the operator workstation is used to output video signals to the display of the corresponding operator console.

[0056] This embodiment provides a monitoring screen control system that allows control room operators in a DCS system to directly control the monitoring screen using a console. This significantly increases the convenience and stability of operator operations on the monitoring screen within the DCS system, while simultaneously resolving the issues of network bandwidth consumption and information security concerns inherent in traditional implementations. The system's hardware structure is simple and effective, possessing immense engineering application value.

[0057] Example 2

[0058] This embodiment discloses a control method for a monitoring screen control system, wherein the monitoring screen control system is the monitoring screen control system described in Embodiment 1, and the control method includes the following steps:

[0059] The keyboard and mouse signal transmitter receives keyboard and mouse signals sent by the corresponding operator console, converts the keyboard and mouse signals into corresponding communication signals, and sends the communication signals to the keyboard and mouse signal switching controller;

[0060] The keyboard and mouse signal switching controller forwards the received communication signal to the corresponding first keyboard and mouse signal receiver or the corresponding second keyboard and mouse signal receiver according to the external instruction;

[0061] If the first keyboard and mouse signal receiver receives the communication signal, it converts the communication signal into a corresponding keyboard and mouse signal and sends the keyboard and mouse signal to the operator workstation.

[0062] If the second keyboard and mouse signal receiver receives the communication signal, it converts the communication signal into a corresponding keyboard and mouse signal and sends the keyboard and mouse signal to the monitoring screen workstation.

[0063] The control method of the monitoring screen control system allows any operator console to control any monitoring screen workstation with its keyboard and mouse.

[0064] In one optional implementation, all operator workstations and the keyboard and mouse signal switching controller are located on the same network; the control method further includes the following steps:

[0065] The keyboard and mouse signal switching controller receives external commands sent by any operator workstation.

[0066] In one optional implementation, the first operator workstation and the keyboard and mouse signal switching controller are located on the same network, wherein the first operator workstation is any one of all operator workstations;

[0067] The control method further includes the following steps:

[0068] The first operator workstation sends an external command to the keyboard and mouse signal switching controller, or receives an external command sent by the second operator workstation and forwards the external command to the keyboard and mouse signal switching controller, wherein the second operator workstation is the operator workstation other than the first operator workstation among all operator workstations; the keyboard and mouse signal switching controller receives the external command sent by the first operator workstation.

[0069] In one optional implementation, all monitoring screen workstations and the keyboard and mouse signal switching controller are located on the same network; the control method further includes the following steps:

[0070] The keyboard and mouse signal switching controller receives external commands sent by any monitoring screen workstation.

[0071] In one optional implementation, the first monitoring screen workstation and the keyboard and mouse signal switching controller are located on the same network, wherein the first monitoring screen workstation is any one of all monitoring screen workstations;

[0072] The control method further includes the following steps:

[0073] The first monitoring screen workstation sends an external command to the keyboard and mouse signal switching controller, or receives an external command sent by the second monitoring screen workstation and forwards the external command to the keyboard and mouse signal switching controller; wherein, the second monitoring screen workstation is any monitoring screen workstation other than the first monitoring screen workstation; the keyboard and mouse signal switching controller receives the external command sent by the first monitoring screen workstation.

[0074] In one optional implementation, the step of the keyboard and mouse signal transmitter converting the keyboard and mouse signals into corresponding communication signals specifically includes: the keyboard and mouse signal transmitter converting the keyboard and mouse signals into corresponding communication signals according to a preset communication protocol;

[0075] The step of the first keyboard and mouse signal receiver converting the received communication signal into the corresponding keyboard and mouse signal specifically includes: the first keyboard and mouse signal receiver converting the received communication signal into the corresponding keyboard and mouse signal according to the preset communication protocol;

[0076] The step of the second keyboard and mouse signal receiver converting the received communication signal into the corresponding keyboard and mouse signal specifically includes: the second keyboard and mouse signal receiver converting the received communication signal into the corresponding keyboard and mouse signal according to the preset communication protocol.

[0077] This embodiment provides a control method for a monitoring screen control system, enabling control room operators in a DCS system to directly control the monitoring screen using a console. This significantly increases the convenience and stability of operator operations on the monitoring screen within the DCS system, while simultaneously resolving the issues of network bandwidth consumption and information security concerns inherent in traditional implementations. The monitoring screen control system features a simple and effective hardware structure, making it highly significant for engineering applications.

[0078] Example 3

[0079] This embodiment discloses a distributed control system, such as Figure 4 As shown, it includes at least one operator console, at least one operator workstation, at least one monitoring screen, at least one monitoring screen workstation, and a monitoring screen control system.

[0080] This embodiment provides a distributed control system that allows control room operators in a DCS system to directly control the monitoring screen using a console. This significantly increases the convenience and stability of operator operations on the monitoring screen within the DCS system, while simultaneously resolving the issues of network bandwidth consumption and information security concerns inherent in traditional implementations. The monitoring screen control system in this distributed control system has a simple and effective hardware structure, making it of great engineering application significance.

[0081] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A monitoring screen control system, characterized in that, It includes a keyboard and mouse signal switching controller, at least one keyboard and mouse signal transmitter, at least one first keyboard and mouse signal receiver, and at least one second keyboard and mouse signal receiver; The keyboard and mouse signal transmitter is connected to the corresponding operator console, and is used to receive the keyboard and mouse signals sent by the operator console, convert the keyboard and mouse signals into corresponding communication signals, and send the communication signals to the keyboard and mouse signal switching controller. The keyboard and mouse signal switching controller is used to forward the received communication signal to the corresponding first keyboard and mouse signal receiver or the corresponding second keyboard and mouse signal receiver according to external instructions; The first keyboard and mouse signal receiver is connected to the corresponding operator workstation and is used to convert the received communication signal into the corresponding keyboard and mouse signal and send the keyboard and mouse signal to the operator workstation; The second keyboard and mouse signal receiver is connected to the corresponding monitoring screen workstation and is used to convert the received communication signal into the corresponding keyboard and mouse signal and send the keyboard and mouse signal to the monitoring screen workstation, wherein the monitoring screen workstation is used to output video signal to the corresponding monitoring screen; All operator workstations are located on the same network as the keyboard and mouse signal switching controller, which is used to receive external commands sent by any operator workstation; or, The first operator workstation and the keyboard and mouse signal switching controller are located in the same network, wherein the first operator workstation is any one of all operator workstations; the first operator workstation is used to send external instructions to the keyboard and mouse signal switching controller, and to receive external instructions sent by the second operator workstation and forward the external instructions to the keyboard and mouse signal switching controller, wherein the second operator workstation is any operator workstation other than the first operator workstation; the keyboard and mouse signal switching controller is used to receive the external instructions sent by the first operator workstation.

2. The monitoring screen control system as described in claim 1, characterized in that, All monitoring screen workstations are located on the same network as the keyboard and mouse signal switching controller, which is used to receive external commands sent by any monitoring screen workstation. or, The first monitoring screen workstation and the keyboard and mouse signal switching controller are located in the same network, wherein the first monitoring screen workstation is any one of all monitoring screen workstations; the first monitoring screen workstation is used to send external instructions to the keyboard and mouse signal switching controller, and to receive external instructions sent by the second monitoring screen workstation and forward the external instructions to the keyboard and mouse signal switching controller, wherein the second monitoring screen workstation is any monitoring screen workstation other than the first monitoring screen workstation; the keyboard and mouse signal switching controller is used to receive the external instructions sent by the first monitoring screen workstation.

3. The monitoring screen control system as described in claim 1, characterized in that, The keyboard and mouse signal transmitter is specifically used to convert the keyboard and mouse signals into corresponding communication signals according to a preset communication protocol. The first keyboard and mouse signal receiver is specifically used to convert the received communication signals into corresponding keyboard and mouse signals according to the preset communication protocol. The second keyboard and mouse signal receiver is specifically used to convert the received communication signals into corresponding keyboard and mouse signals according to the preset communication protocol.

4. The monitoring screen control system as described in any one of claims 1-3, characterized in that, The operator workstation is used to output video signals to the display of the corresponding operator console.

5. A control method for a monitoring screen control system, characterized in that, The monitoring screen control system is the monitoring screen control system according to claim 1, and the control method includes the following steps: The keyboard and mouse signal transmitter receives keyboard and mouse signals sent by the corresponding operator console, converts the keyboard and mouse signals into corresponding communication signals, and sends the communication signals to the keyboard and mouse signal switching controller; The keyboard and mouse signal switching controller forwards the received communication signal to the corresponding first keyboard and mouse signal receiver or the corresponding second keyboard and mouse signal receiver according to the external instruction; If the first keyboard and mouse signal receiver receives the communication signal, it converts the communication signal into a corresponding keyboard and mouse signal and sends the keyboard and mouse signal to the operator workstation. If the second keyboard and mouse signal receiver receives the communication signal, it converts the communication signal into a corresponding keyboard and mouse signal and sends the keyboard and mouse signal to the monitoring screen workstation. All operator workstations are located on the same network as the keyboard and mouse signal switching controller; the control method further includes the following steps: The keyboard and mouse signal switching controller receives external commands sent by any operator workstation; or, The first operator workstation and the keyboard and mouse signal switching controller are located on the same network, wherein the first operator workstation is any one of all operator workstations; The control method further includes the following steps: The first operator workstation sends an external command to the keyboard and mouse signal switching controller, or receives an external command sent by the second operator workstation and forwards the external command to the keyboard and mouse signal switching controller, wherein the second operator workstation is the operator workstation other than the first operator workstation among all operator workstations; the keyboard and mouse signal switching controller receives the external command sent by the first operator workstation.

6. The control method as described in claim 5, characterized in that, All monitoring screen workstations and the keyboard and mouse signal switching controller are located on the same network; the control method further includes the following steps: The keyboard and mouse signal switching controller receives external commands sent by any monitoring screen workstation; or, The first monitoring screen workstation and the keyboard and mouse signal switching controller are located on the same network, wherein the first monitoring screen workstation is any one of all monitoring screen workstations; The control method further includes the following steps: The first monitoring screen workstation sends an external command to the keyboard and mouse signal switching controller, or receives an external command sent by the second monitoring screen workstation and forwards the external command to the keyboard and mouse signal switching controller; wherein, the second monitoring screen workstation is any monitoring screen workstation other than the first monitoring screen workstation; the keyboard and mouse signal switching controller receives the external command sent by the first monitoring screen workstation.

7. The control method as described in any one of claims 5-6, characterized in that, The step of the keyboard and mouse signal transmitter converting the keyboard and mouse signals into corresponding communication signals specifically includes: the keyboard and mouse signal transmitter converting the keyboard and mouse signals into corresponding communication signals according to a preset communication protocol; The step of the first keyboard and mouse signal receiver converting the received communication signal into the corresponding keyboard and mouse signal specifically includes: the first keyboard and mouse signal receiver converting the received communication signal into the corresponding keyboard and mouse signal according to the preset communication protocol; The step of the second keyboard and mouse signal receiver converting the received communication signal into the corresponding keyboard and mouse signal specifically includes: the second keyboard and mouse signal receiver converting the received communication signal into the corresponding keyboard and mouse signal according to the preset communication protocol.

8. A distributed control system, characterized in that, It includes at least one operator console, at least one operator workstation, at least one monitoring screen, at least one monitoring screen workstation, and a monitoring screen control system as described in any one of claims 1-4.

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