TWI691867B - Human-machine interface system and communication control device thereof - Google Patents

Abstract

A human-machine interface system includes a near-end operating device, a display device, a human-machine interface control device and a communication control device. The near-end operating device generates a near-end operating signal. The display device shows a display image corresponding to a display signal. The human-machine interface control device generates the display signal according to the near-end operating signal or a far-end operating signal. The communication control device includes a wireless communication connection port for a communication connection with a far-end operating device. The communication control device transmits the near-end operating signal to the human-machine interface control device, transmits the display signal to the display device and optionally transmits it to the far-end operating device. The communication control device transmits the far-end operating signal to the human-machine interface control device, when receiving the far-end operating signal and determining that no near-end operating signal is received.

Description

Human-machine interface system and its communication control device

The invention relates to a communication control device, in particular to a communication control device of a man-machine interface system.

In today's society, Human-Machine Interface (HMI) has been widely used in various fields, such as equipment control, process status information monitoring and other industrial fields, or commercial fields, can be seen in the application of human-machine interface. Human-machine interface, as the name suggests, refers to the interactive interface between the user and the machine or computerized system or software. Generally speaking, the human-machine interface will include a signal input device and a signal output device on the user side, and a controller on the system side. The three are connected to each other to receive input signals, generate or process image data, and output image data.

However, with the advancement of technology, the requirements for the resolution of image data are getting higher and higher. It is no longer enough to rely on the system-side memory to store image data. In addition, in order to meet the needs of computer networking, the controller on the system side often needs to be replaced according to different applications, thus incurring huge equipment replacement costs.

In view of the above, the present invention provides a human-machine interface system and its communication control device.

The communication control device according to an embodiment of the present invention is suitable for a man-machine interface system including a man-machine interface display control device, a near-end operation device, and a display device, and includes an operation signal transmission circuit, a display signal transmission circuit, and a central controller. The operation signal transmission circuit includes a switching component, and has an operation signal input port and an operation signal output port. The operation signal input port is used to connect a near-end operation device to receive a near-end operation signal, and the operation signal output port is used to connect a display unit. Control device. The display signal transmission circuit has a display signal input port and a display signal output port. The display signal input port is used to connect the display control device of the man-machine interface, the display signal output port is used to connect the display device, and the display signal transmission circuit is used to connect the man-machine interface The display signal of the display control device is sent to the display device. The central controller is electrically connected to the operation signal transmission circuit and the display signal transmission circuit, and includes a wireless communication port for communication connection to the remote operation device. The central controller receives the display signal through the display signal transmission circuit and selectively transmits it to the remote operation device. The central controller determines whether the near-end operation signal is received through the operation signal transmission circuit when the remote operation signal is received at the wireless communication port, and controls the switching component to cut off the operation signal when it is determined that the near-end operation signal is not received The electrical connection between the input port and the operation signal output port, and controls the operation signal output port to output the remote operation signal.

The human-machine interface system according to an embodiment of the present invention includes a near-end operation device, a display device, a man-machine interface display control device, and a communication control device, wherein the communication control device is electrically connected to the near-end operation device, the display device, and the man-machine Interface display control device. The near-end operating device generates a near-end operating signal. The display device presents the corresponding display screen according to the display signal. The man-machine interface display control device generates a display signal according to the near-end operation signal or the far-end operation signal. The communication control device includes a wireless communication port for communication to the remote operation device. The communication control device transmits the near-end operation signal to the man-machine interface display control device, transmits the display signal to the display device, and selectively transmits it to the remote operation device through the wireless communication port. Among them, the communication control device judges whether the near-end operation signal is received when the wireless communication port receives the remote operation signal, and sends the remote operation signal to the terminal display when it is judged that the near-end operation signal is not received. Control device.

With the above structure, the human-machine interface system and the communication control device disclosed in this case can be switched between the near-end control mode and the far-end control mode, and the function of signal copying can avoid insufficient memory space in the system problem.

The above description of the disclosure and the following description of the embodiments are used to demonstrate and explain the spirit and principle of the present invention, and provide a further explanation of the scope of the patent application of the present invention.

The following describes in detail the detailed features and advantages of the present invention in the embodiments. The content is sufficient for any person skilled in the relevant art to understand and implement the technical content of the present invention, and according to the contents disclosed in this specification, the scope of patent application and the drawings Anyone skilled in the relevant art can easily understand the purpose and advantages of the present invention. The following examples further illustrate the views of the present invention in detail, but do not limit the scope of the present invention in any way.

Please refer to FIG. 1, which is a functional block diagram of a human-machine interface system according to an embodiment of the invention. The human-machine interface system 1 shown in FIG. 1 includes a near-end operation device 10, a display device 20, a human-machine interface display control device 30, a communication control device 40, and a replaceable connector 50, wherein the communication control device 40 is electrically connected to The man-machine interface display control device 30 is electrically connected to the proximal operation device 10 and the display device 20 and the man-machine interface display control device 30 through a replaceable connector 50. In particular, the replaceable connector 50 is an optional component, and the communication control device 40 can also be directly electrically connected to the proximal operation device 10 and the display device 20.

The near-end operation device 10 can generate a near-end operation signal. In detail, when the near-end operation device 10 is triggered, an operation command is generated correspondingly, that is, the near-end operation signal. The near-end operation device 10 is, for example, a signal input device such as a mouse, a keyboard, and a touch panel. The touch panel further includes, for example, a resistive operation panel and a capacitive operation panel. The present invention is not limited thereto. The display device 20 can present a corresponding display screen according to the received display signal. For example, the display device 20 may be a Graphic LCD, a Super Twisted Nematic display LCD (STN-LCD) or other liquid crystal displays, or a liquid crystal module (Liquid Crystal Module) , LCM), the present invention is not limited to this. In one embodiment, the near-end operation device 10 and the display device 20 can be integrated into a touch screen.

The man-machine interface display control device 30 is, for example, a programmable logic controller (Programmable Logic Controller, PLC), which can be generated according to the near-end operation signal of the aforementioned near-end operation device 10 or the remote operation signal from the remote operation device Corresponding display signal. In other words, the man-machine interface display control device 30 can be controlled by the near-end operation device 10 (for example, a user device) or the remote operation device 5 (for example, a cloud database). For example, the above-mentioned near-end or far-end operation signal may be an instruction to display monitoring data, an instruction to calculate the detected data and display the operation result, or other common man-machine interface operation instructions, and the present invention is not limited. Further, the display signal generated by the human-machine interface display control device 30 may only include display screen data, such as color distribution data and gray-scale distribution data of the display screen, but not other data not related to the display screen, such as operation The operation action corresponding to the signal, the source of the operation device, the type of operation device, the original setting parameters, etc., thereby enhancing the security of data transmission.

The communication control device 40 is used to control the signal transmission between the near-end operation device 10, the display device 20, the man-machine interface display control device 30, and the far-end operation device 5. In addition to being electrically connected to the near-end operation device 10, the display device 20, and the man-machine interface display control device 30, the communication control device 40 also has a wireless communication port for communication to the remote operation device 5. The operation of the communication control device 40 is explained below, and its detailed configuration will be described later.

The communication control device 40 has a near-end control mode and a far-end control mode. In the near-end control mode, the communication control device 40 transmits the near-end operation signal from the near-end operation device 10 to the man-machine interface display control device 30. Similarly, in the remote control mode, the communication control device 40 will transmit the remote operation signal from the remote operation device 5 to the man-machine interface display control device 30. Among them, the near-end control mode will take precedence over the far-end control mode. When receiving the remote operation signal, the communication control device 40 determines whether the near-end operation signal is received. If it is judged that the near-end operation signal is not received, the above-mentioned remote control mode is executed; if it is judged that the near-end operation signal is received, the above-mentioned near-end control mode is maintained.

In addition to transmitting the near-end or far-end operation signals to the man-machine interface display control device 30, the communication control device 40 can also transmit the display signals generated by the man-machine interface display control device 30 to the display device 20, and optionally to the remote device.端operative device 5. For example, the near-end or far-end operation signal may include an instruction to upload a display signal to the remote operation device 5, and the communication control device 40 can obtain the display signal correspondingly generated by the man-machine interface display control device 30 and upload it to the remote端operative device 5. In this way, the communication control device 40 can simultaneously transmit the display signal to the display device 20 and the remote operation device 5 to achieve the function of signal copying. Further, since the data corresponding to the display signal has been backed up to the remote operation device 5 through the communication control device 40, the display control device 30 of the man-machine interface can delete the data corresponding to the originally stored display signal, thereby solving the problem of memory in the system The problem of insufficient space.

In one embodiment, when the communication control device 40 executes the remote control mode, the human-machine interface display control device 30 can also determine that the received operation signal is the remote operation signal and generate display screen data associated with the remote control mode Then, the communication control device 40 controls the display device 20 to display the display screen data to remind the user that the current human-machine interface display control device 30 is in the state of remote control.

As mentioned above, the communication control device 40 can be directly electrically connected or electrically connected to the proximal operation device 10 and the display device 20 through the replaceable connector 50. In detail, the replaceable connector 50 includes a first port and a second port. The first connection port is used to electrically connect the near-end operation device 10 and the communication control device 40, and the second connection port is used to electrically connect the display device 20 and the communication control device 40. Through the replacement setting of the replaceable connector 50, the communication control device 40 can be connected to the near-end operation device 10 and/or the display device 20 of different specifications to meet the needs of different human-machine interface applications. Further, the replaceable connector 50 can be a flexible printed circuit (FPC). Compared with other circuit boards, the flexible circuit board can reduce the overall weight and thickness of the human-machine interface system 1.

Please refer to FIG. 1 and FIG. 2 together to further explain the configuration of the communication control device 40. FIG. 2 is a functional block diagram of the communication control device 40 according to an embodiment of the present invention. As shown in FIG. 2, the communication control device 40 includes an operation signal transmission circuit 41, a display signal transmission circuit 43 and a central controller 45. The central controller 45 is electrically connected to the operation signal transmission circuit 41 and the display signal transmission circuit 43.

The operation signal transmission circuit 41 includes a switching component 411, and has an operation signal input port 413 and an operation signal output port 415, wherein the operation signal input port 413 is used to connect the near-end operation device 10 to receive the near-end operation signal, and the operation signal output port 415 is used to connect the display control device 30 of the man-machine interface. Further, the operation signal transmission circuit 41 may include more than two signal transmission sub-circuits. Taking the near-end operation device 10 as a touch panel as an example, the operation signal transmission circuit 41 may include two signal transmission sub-circuits, respectively a horizontal position signal transmission sub-circuit and a vertical position signal transmission sub-circuit. The horizontal position signal transmission sub-circuit scans the touch panel in the horizontal direction to obtain the horizontal position of the touch trigger point (for example, x coordinate); the vertical position signal transmission sub-circuit scans the touch panel in the vertical direction to obtain the touch trigger point The vertical position (for example, the y coordinate).

In this embodiment, the operation signal input port 413 includes a first input terminal 413a and a second input terminal 413b, the switching component 411 of the operation signal transmission circuit 41 includes a first switching element 411a and a second switching element 411b, and the operation signal is output Port 415 includes a first output 415a and a second output 415b. The first switching element 411a is disposed between the first input terminal 413a and the first output terminal 415a, and together forms a horizontal position signal transmission sub-circuit, and the second switching element 411b is disposed between the second input terminal 413b and the second output terminal 415b Together, they form a vertical position signal transmission sub-circuit. The first and second switching elements 411a and 411b are switches, for example.

In one embodiment, the one or more signal transmission sub-circuits of the operation signal transmission circuit 41 may further include signal relay nodes, and the signal relay nodes are intersections of signal paths. Taking the two signal transmission sub-circuits of FIG. 2 as an example, the operation signal transmission circuit 41 may include signal relay nodes 417a and 417b. The signal relay nodes 417a/417b of each signal transmission sub-circuit are electrically connected to the corresponding operation signal output terminals 415a/415b in the central controller 45 and the operation signal output port 415, respectively, The first or second switching element 411a/411b is connected to the corresponding first or second input terminal 413a/413b in the operation signal input port 413, respectively. The first and second switching elements 411a and 411b of the switching element 411 have control terminals 4111a and 4111b respectively electrically connected to the central controller 45 to be controlled by the central controller 45.

In another embodiment, the one or more signal transmission sub-circuits of the operation signal transmission circuit 41 described above may further include diodes. Taking the two signal transmission sub-circuits of FIG. 2 as an example, the operation signal transmission circuit 41 may include diodes 419a and 419b. The cathode terminal of the diode 419a/419b is electrically connected to the corresponding first or second output terminal 415a/415b in the operation signal output port 415, and the anode terminal is electrically connected to the corresponding signal relay node 417a/ 417b. In yet another embodiment, one or more signal transmission sub-circuits of the operation signal transmission circuit 41 may further include a signal copy sub-circuit disposed at the signal relay node, wherein the signal copy sub-circuit is used to copy the near-end operation signal for transmission To the central controller 45 and the man-machine interface display control device 30. For example, the signal replication sub-circuit may be a signal amplifier, which amplifies and shunts the near-end operation signal, so that the current magnitude of the near-end operation signal sent to the central controller 45 and the man-machine interface display control device 30 is similar to the original near-end Operate the signal to improve the effect of signal copying.

The display signal transmission circuit 43 has a display signal input port 433 and a display signal output port 435, wherein the display signal input port 433 is used to connect the display control device 30 of the display unit, and the display signal output port 435 is used to connect the display device 20. The display signal transmission circuit 43 is used to transmit the display signal of the man-machine interface display control device 30 to the display device 20. Further, the intersection of the signal paths in the display signal transmission circuit 43 can be regarded as a signal relay node 437, which is electrically connected to the central controller 45, the display signal input port 433, and the display signal output port 435, respectively. In an embodiment, the display signal transmission circuit 43 may further include a diode 439 electrically connected between the signal relay node 437 and the display signal input port 433, wherein the cathode end of the diode 439 is electrically connected to the signal The relay node 437 and its anode end are electrically connected to the display signal input port 433. In another embodiment, the display signal transmission circuit 43 may further include a signal replication sub-circuit disposed on the signal relay node 437 for copying the display signal generated by the display control device 30 of the man-machine interface for transmission to the central controller 45 and Display device 20. The signal replication sub-circuit included in the display signal transmission circuit 43 is similar to the signal replication sub-circuit of the operation signal transmission circuit 41 described above, and will not be repeated here.

The diode in the operation signal transmission circuit, the signal replication sub-circuit in the operation signal transmission circuit, the diode in the display signal transmission circuit, and the signal replication sub-circuit in the display signal transmission circuit are optional components.

The central controller 45 is, for example, a microcontroller (Microcontroller Unit, MCU), and includes a wireless communication port 451 to communicate with the remote operation device 5. For example, the wireless communication port 451 can perform wireless signal transmission through a transmission control protocol, an internet protocol, or a user packet protocol (TCP/IP/UDP). The central controller 45 is used to determine and execute signal transmission between the man-machine interface display control device 30, the near-end operation device 10, the display device 20, and the far-end operation device 5.

In an embodiment, the replaceable connector 50 mentioned in the foregoing embodiment may be included in the configuration of the communication control device 40. The first port of the replaceable connector 50 can be connected to the operation signal input port 413, so that the operation signal input port 413 is electrically connected to the near-end operation device 10; the second port can be connected to the display signal output Port 415, so that the display signal output port 415 is electrically connected to the display device 20. As described above, through the replacement setting of the replaceable connector 50, the communication control device 40 can meet the needs of different human-machine interface applications. Further, selecting a flexible circuit board as the replaceable connector 50 can make the communication control device 40 have the advantages of light weight and thin thickness.

The central controller 45 can perform the aforementioned determination of whether to switch from the near-end control mode to the far-end control mode. In detail, when the central controller 45 receives a remote operation signal through the wireless communication port 451, it determines whether a near-end operation signal is received through the operation signal transmission circuit 41. When judging that the near-end operation signal is not received, the central controller 45 controls the switching component 411 to cut off the electrical connection between the operation signal input port 413 and the operation signal output port 415 to control the operation signal output port 415 to output the remote end The operation signal is sent to the human-machine interface display control device 30; and when it is judged that the near-end operation signal is received, the central controller 45 maintains the electrical connection between the operation signal input port 413 and the operation signal output port 415 to control The operation signal output port 415 maintains the output of the near-end operation signal.

The central controller 45 can receive the display signal generated by the man-machine interface display control device 30 through the display signal transmission circuit 43 and selectively transmit it to the remote operation device 5 through the wireless communication port 451. Further, the central controller 45 can determine whether to upload the display signal to the remote operation device 5 according to the near-end or far-end operation signal corresponding to the display signal. For example, the near-end or far-end operation signal may include an instruction to upload the display signal to the remote operation device 5, and the central controller 45 will transmit the display signal to the remote operation device 5 accordingly.

In one embodiment, the central controller 45 can store one or more warning conditions, and can periodically retrieve the display signal generated by the man-machine interface display control device 30 to determine whether the warning conditions are met. When a signal meets the warning condition, the central controller 45 can issue a warning signal to the remote operation device 5, or the central controller 45 can periodically receive a status inquiry command from the remote operation device 5, and reply to the man-machine The interface shows that the control device 30 is in a normal or abnormal state. The remote operation device 5 can prompt the operator according to the alarm or abnormal state notification (for example, by message, voice or other notification methods).

With the above structure, the human-machine interface system and the communication control device disclosed in this case can be switched between the near-end control mode and the far-end control mode, and the function of signal copying can avoid insufficient memory space in the system problem. In addition, the human-machine interface system and its communication control device disclosed in this case can replace the replaceable connector according to the needs of different human-machine interface applications. Compared with the replacement of the entire human-machine interface controller in the conventional technology, it can significantly Reduce the cost of equipment replacement. In addition, through the design that the display signal only includes the display screen data, the risk of intercepting the data during the transmission process and decoding to obtain the original data can be reduced, thereby improving the security of data transmission.

Although the present invention is disclosed as the foregoing embodiments, it is not intended to limit the present invention. Without departing from the spirit and scope of the present invention, all modifications and retouching are within the scope of patent protection of the present invention. For the protection scope defined by the present invention, please refer to the attached patent application scope.

1 ​ 5 Remote control device Remote control device 10 Proximal operation device 20, display device, display device 30 Man-machine interface display control device 40 Communication control device Communication communication control device 50 Interchangeable connectors 41 Operation of the signal transmission circuit of the operation of the signal 43 Display of the signal transmission circuit 45 Central Control Unit Central Control Unit 411 Switching components 411a The first switching element 411b The second switching element 4111a, 4111b Control end 413 Operating signal input port 413a The first input terminal 413b The second input terminal 415 Operate the signal output port 415a The first output terminal 415b The second output terminal 417a, 417b Signal relay node 419a, 419b Diode 433 The display signal input port is displayed 435 Display the signal output port 437 Signal relay node 439 ​ 451 Wireless communication port for wireless communication port

FIG. 1 is a functional block diagram of a human-machine interface system according to an embodiment of the invention. 2 is a functional block diagram of a communication control device of a man-machine interface system according to an embodiment of the invention.

1 ​ 5 Remote control device Remote control device 10 Proximal operation device 20, display device, display device 30 Man-machine interface display control device 40 Communication control device Communication communication control device 50 Interchangeable connectors

Claims (17)

A communication control device is suitable for a man-machine interface system. The man-machine interface system includes a man-machine interface display control device, a near-end operation device, and a display device, and the communication control device includes: An operation signal transmission circuit, including a switching element, and having an operation signal input port and an operation signal output port, the operation signal input port is used to connect the near-end operation device to receive a near-end operation signal, and the operation signal The output port is used to connect the display control device of the human-machine interface; A display signal transmission circuit has a display signal input port and a display signal output port, the display signal input port is used to connect the man-machine interface display control device, the display signal output port is used to connect the display device, and the display The signal transmission circuit is used to transmit a display signal of the display control device of the man-machine interface to the display device; and A central controller, electrically connected to the operation signal transmission circuit and the display signal transmission circuit, and includes a wireless communication port, the wireless communication port is used for communication connection to a remote operation device, the central controller passes The display signal transmission circuit receives the display signal and selectively transmits it to the remote operation device through the wireless communication port; When the central controller receives a remote operation signal from the wireless communication port, it determines whether the near-end operation signal is received through the operation signal transmission circuit, and when it is judged that the near-end operation signal is not received, Control the switching component to cut off the electrical connection between the operation signal input port and the operation signal output port, and control the operation signal output port to output the remote operation signal. The human-machine interface communication control device according to claim 1, wherein the switching component of the operation signal transmission circuit includes a first switching element and a second switching element, and the operation signal input port includes a first input terminal and a The second input terminal, the operation signal output port includes a first output terminal and a second output terminal, wherein the first switching element is disposed between the first input terminal and the first output terminal to jointly form a horizontal position A signal transmission sub-circuit, and the second switching element is disposed between the second input end and the second output end, and together forms a vertical position signal transmission sub-circuit. The communication control device according to claim 1, wherein the operation signal transmission circuit further has a first signal relay node, the first signal relay node is electrically connected to the central controller and the operation signal output port, And connected to the operation signal input port through the switching element, the switching element has a control terminal electrically connected to the central controller. The communication control device according to claim 3, wherein the operation signal transmission circuit further includes a first diode, a cathode terminal of the first diode is electrically connected to the operation signal output port, and the first two The anode end of the polar body is electrically connected to the first signal relay node, wherein the display signal transmission circuit further has a second signal relay node, respectively electrically connected to the central controller, the display signal input port and the A display signal output port, the display signal transmission circuit includes a second diode, the cathode terminal of the second diode is electrically connected to the second signal relay node, and the anode terminal of the second diode is electrically Connect to the display signal input port. The communication control device according to claim 3, wherein the operation signal transmission circuit further includes a first signal replication sub-circuit, and the first signal replication sub-circuit is disposed at the first signal relay node and used to replicate the near signal The terminal operation signal is transmitted to the central controller and the man-machine interface display control device, wherein the display signal transmission circuit further has a second signal relay node and includes a second signal replication sub-circuit, the second signal replication sub-circuit The circuit is disposed at the second signal relay node, and is used to copy the display signal of the display control device of the man-machine interface to be transmitted to the central controller and the display device. The communication control device according to claim 1, further comprising: A replaceable connector includes a first port and a second port, wherein the first port is electrically connected to the operation signal input port for electrically connecting the operation signal input port to the proximal end An operation device, and the second connection port is electrically connected to the display signal output port for electrically connecting the display signal output port to the display device. The communication control device according to claim 6, wherein the replaceable connector belongs to a flexible circuit board. The communication control device according to claim 1, wherein the display signal only includes display screen data. A human-machine interface system, including: A near-end operating device to generate a near-end operating signal; A display device, presenting a corresponding display screen according to a display signal; A human-machine interface display control device, generating the display signal according to the near-end operation signal or a remote operation signal; and A communication control device, electrically connected to the near-end operation device, the display device, and the man-machine interface display control device, and includes a wireless communication port for communication connection to a remote operation device , The communication control device sends the near-end operation signal to the man-machine interface display control device, sends the display signal to the display device, and selectively sends it to the remote operation device through the wireless communication port; The communication control device determines whether the near-end operation signal is received when the wireless communication port receives a remote operation signal, and transmits the remote operation signal when it is determined that the near-end operation signal is not received To the display control device of the man-machine interface. The human-machine interface system according to claim 9 further includes a replaceable connector including a first port and a second port, the first port is electrically connected to the proximal operation device and the communication A control device, and the second port is electrically connected to the display device and the communication control device. The human-machine interface system according to claim 10, wherein the replaceable connector belongs to a flexible circuit board. The human-machine interface system according to claim 9, wherein the communication control device includes: An operation signal transmission circuit, including a switching element, and having an operation signal input port and an operation signal output port, the operation signal input port is electrically connected to the near-end operation device, and the operation signal output port is electrically connected to the person Machine interface display control device; A display signal transmission circuit having a display signal input port and a display signal output port, the display signal input port is electrically connected to the man-machine interface display control device, and the display signal output port is electrically connected to the display device; and A central controller electrically connected to the operation signal transmission circuit and the display signal transmission circuit, and including the wireless communication port, the central controller receives the display signal through the display signal transmission circuit, and selectively passes the The wireless communication port is sent to the remote operation device; When the central controller receives the remote operation signal, it determines whether the near-end operation signal is received through the operation signal transmission circuit, and when it determines that the near-end operation signal is not received, controls the switching component to The electrical connection between the operation signal input port and the operation signal output port is cut off, and the operation signal output port is controlled to output the remote operation signal. The human-machine interface system according to claim 12, wherein the switching element of the operation signal transmission circuit includes a first switching element and a second switching element, and the operation signal input port includes a first input terminal and a second The input terminal, the operation signal output port includes a first output terminal and a second output terminal, wherein the first switching element is disposed between the first input terminal and the first output terminal to jointly form a horizontal position signal transmission A sub-circuit, and the second switching element is disposed between the second input end and the second output end, and together forms a vertical position signal transmission sub-circuit. The human-machine interface system according to claim 12, wherein the operation signal transmission circuit further has a first signal relay node, and the first signal relay node is electrically connected to the central controller and the operation signal output port, respectively And connected to the operation signal input port through the switching element, the switching element has a control terminal electrically connected to the central controller. The human-machine interface system according to claim 14, wherein the operation signal transmission circuit further includes a first diode, a cathode end of the first diode is electrically connected to the operation signal output port, and the first The anode end of the diode is electrically connected to the first signal relay node, wherein the display signal transmission circuit further has a second signal relay node, respectively electrically connected to the central controller, the display signal input port and The display signal output port, the display signal transmission circuit includes a second diode, the cathode end of the second diode is electrically connected to the second signal relay node, and the anode end of the second diode It is electrically connected to the display signal input port. The human-machine interface system according to claim 14, wherein the operation signal transmission circuit further includes a first signal copy sub-circuit, the first signal copy sub-circuit is disposed at the first signal relay node, and used to copy the The near-end operation signal is transmitted to the central controller and the human-machine interface display control device, wherein the display signal transmission circuit further has a second signal relay node and includes a second signal copy sub-circuit, the second signal is copied The sub-circuit is disposed at the second signal relay node, and is used to copy the display data of the display control device of the man-machine interface for transmission to the central controller and the display device. The human-machine interface system according to claim 9, wherein the display signal only includes display screen data.

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