CN114745517A - Double-machine control switcher, video transmission system and train control display system - Google Patents
Double-machine control switcher, video transmission system and train control display system Download PDFInfo
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- CN114745517A CN114745517A CN202210383755.9A CN202210383755A CN114745517A CN 114745517 A CN114745517 A CN 114745517A CN 202210383755 A CN202210383755 A CN 202210383755A CN 114745517 A CN114745517 A CN 114745517A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/66—Transforming electric information into light information
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a double-machine control switcher, a video transmission system and a train control display system, wherein an optical switch is arranged, so that the video signal is switched after being converted into the optical signal, the direct switching of an electric signal corresponding to the video signal is avoided, and the phenomenon of screen flashing of a display is not easy to occur due to the fact that the optical signal is not easily interfered by an electromagnetic environment when being switched.
Description
Technical Field
The invention relates to the technical field of video switchers, in particular to a double-machine control switcher, a video transmission system and a train control display system.
Background
The display part of the television system comprises a video switcher and a display. The video switcher is used for switching, repeating, processing and copying the image signals transmitted by the system. It can automatically or manually control multiple video signals to make the display the video to be displayed.
In the related art, a plurality of paths of video output by a computer are switched during an electrical signal to select a video signal to be transmitted and displayed, and the switched electrical signal is converted into an optical signal and transmitted to a remote display through an optical fiber to be displayed. The problem that the video is switched and selected in the way that the electric signals are switched, the video electric signals belong to weak signals, if the video signal data lines are more, the switching circuit is complex, the interference of an electromagnetic environment is easily caused, and the phenomenon of screen flashing of a display occurs.
Disclosure of Invention
The invention provides a double-machine control switcher, a video transmission system and a train control display system, which are used for switching after video signals are converted into optical signals, so that the direct switching of electric signals corresponding to the video signals is avoided, the interference of an electromagnetic environment is not easily caused when the optical signals are used for switching, and the phenomenon of screen flashing of a display is not easily caused.
To achieve the above object, an embodiment of the present invention provides a dual-device control switch, including: the system comprises a sending end and a receiving end, wherein signals are transmitted between the sending end and the receiving end through optical fibers; the transmitting end comprises a first signal converter, a second signal converter and an optical switch;
one end of the first signal converter is used for inputting a first electric signal corresponding to a first video, the other end of the first signal converter is connected with the first input end of the optical switch, and the first signal converter is used for converting the first electric signal into a first optical signal;
one end of the second signal converter is used for inputting a second electrical signal corresponding to a second video, the other end of the second signal converter is connected with a second input end of the optical switch, and the second signal converter is used for converting the second electrical signal into a second optical signal;
the optical switch is used for switching the first input end or the second input end to be communicated with an output end so as to enable one of the first optical signal or the second optical signal to pass through;
the output end of the optical switch is connected with one end of the receiving end, and the receiving end is used for converting the first optical signal or the second optical signal into a third electric signal.
Optionally, the receiving end includes a third signal converter;
the output end of the optical switch is connected with the third signal converter, and the third signal converter is used for converting the first optical signal or the second optical signal into a third electrical signal.
Optionally, the transmitting end further includes an optical splitter; the receiving end comprises a fourth signal converter and a fifth signal converter;
the input end of the optical splitter is connected with the output end of the optical switch, the first output end of the optical splitter is connected with the fourth signal converter, and the second output end of the optical splitter is connected with the fifth signal converter;
the optical splitter is configured to split the first optical signal or the second optical signal output by the optical switch into two optical signals, the fourth signal converter is configured to convert one of the optical signals into a fourth electrical signal, and the fifth signal converter is configured to convert the other of the optical signals into a fifth electrical signal.
To achieve the above object, a second aspect of the present invention provides a video transmission system, including the dual-device control switch provided in any embodiment of the present invention, further including: a first video output, a second video output and a display;
the dual-computer control switcher is respectively connected with the first video output device, the second video output device and the display, the dual-computer control switcher is used for switching and selecting the first video output by the first video output device or the second video output by the second video output device, and the display is used for displaying the video selected by the dual-computer control switcher.
According to one embodiment of the invention, the first video output device and the second video output device are master and slave video output devices.
According to an embodiment of the present invention, the dual-machine control switch further includes an optical switch controller;
the optical switch controller is respectively connected with the first video output device and the second video output device, and is used for monitoring the state of the first video output device and the state of the second video output device, and controlling the first input end of the optical switch to be communicated with the output end of the optical switch or controlling the second input end of the optical switch to be communicated with the output end of the optical switch according to the monitoring result.
According to an embodiment of the present invention, the monitoring result includes a first state and a second state, the first state is a state in which the first video output device is failed or standby and the second video output device outputs video; the second state is a state that the second video output device is in failure or standby and the first video output device outputs videos;
the optical switch controller is used for controlling the second input end to be communicated with the output end of the optical switch according to the first state; the optical switch controller is further configured to control the first input terminal to communicate with the output terminal of the optical switch according to the second state.
According to an embodiment of the present invention, when the receiving end of the dual-computer controlled switch includes a fourth signal converter and a fifth signal converter, the first port of the display is connected to the output end of the fourth signal converter, and the second port of the display is connected to the output end of the fifth signal converter.
According to one embodiment of the invention, the first port of the display is a DVI port and the second port of the display is an HDMI port.
In order to achieve the above object, a train control display system according to a third aspect of the present invention is further provided, which includes the video transmission system according to any one of the embodiments of the present invention.
According to the dual-machine control switcher, the video transmission system and the train control display system provided by the embodiment of the invention, the dual-machine control switcher comprises: the system comprises a sending end and a receiving end, wherein signals are transmitted between the sending end and the receiving end through optical fibers; the transmitting end comprises a first signal converter, a second signal converter and an optical switch; one end of the first signal converter is used for inputting a first electric signal corresponding to a first video, the other end of the first signal converter is connected with the first input end of the optical switch, and the first signal converter is used for converting the first electric signal into a first optical signal; one end of the second signal converter is used for inputting a second electrical signal corresponding to a second video, the other end of the second signal converter is connected with a second input end of the optical switch, and the second signal converter is used for converting the second electrical signal into a second optical signal; the optical switch is used for switching the first input end or the second input end to be communicated with the output end so as to enable one of the first optical signal or the second optical signal to pass through; the output end of the optical switch is connected with one end of the receiving end, and the receiving end is used for converting the first optical signal or the second optical signal into a third electrical signal. Switch after converting video signal into light signal with the realization, avoided directly switching the signal of telecommunication that video signal corresponds, when using light signal to switch, be difficult to receive electromagnetic environment's interference, the difficult phenomenon that takes place the display and dodge the screen.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a dual-device control switch in the prior art;
fig. 2 is a schematic structural diagram of a dual-device control switch according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a dual-device control switch according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a dual-device control switch according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a video transmission system according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a video transmission system according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
Fig. 1 is a schematic structural diagram of a dual-device control switch in the prior art. As shown in fig. 1, the dual-computer controlled switch 1 includes a transmitting terminal 11 and a receiving terminal 12, where the transmitting terminal 11 includes an electrical switch 13 and an electrical-to-optical signal converter 14, and the receiving terminal 12 includes an optical-to-electrical signal converter 15. The first input end of the electrical switch 13 is configured to receive a first electrical signal corresponding to a first video, the second input end of the electrical switch 13 is configured to receive a second electrical signal corresponding to a second video, and the electrical switch 13 is configured to switch the first input end to be communicated with the output end thereof, or the second input end to be communicated with the output end thereof, so that the output end of the electrical switch 13 outputs the first electrical signal or the second electrical signal; the output end of the electrical switch 13 is connected to the input end of the electrical signal-to-optical signal converter 14, the output end of the electrical signal-to-optical signal converter 14 is connected to the input end of the optical signal-to-electrical signal converter 15, the electrical signal-to-optical signal converter 14 is configured to convert the first electrical signal or the second electrical signal into an optical signal, and the optical signal-to-electrical signal converter 15 is configured to convert the optical signal converted by the first electrical signal or the second electrical signal into an electrical signal.
The double-machine control switcher uses the electric switcher to switch the first electric signal and the second electric signal in the electric switcher, so that the first electric signal and the second electric signal are easily interfered by an electromagnetic environment, and a screen flashing is easily caused during switching.
Therefore, the embodiment of the invention provides a new dual-machine control switcher, a video transmission system and a train control display system to solve the problems.
Fig. 2 is a schematic structural diagram of a dual-device control switch according to an embodiment of the present invention. As shown in fig. 2, the dual-device control switch 100 includes: the method comprises the steps that a transmitting end 10 and a receiving end 20 are arranged, and signals are transmitted between the transmitting end 10 and the receiving end 20 through optical fibers; the transmitting end 10 includes a first signal converter 101, a second signal converter 102, and an optical switch 103;
one end of the first signal converter 101 is configured to input a first electrical signal corresponding to a first video, and the other end of the first signal converter is connected to a first input end of the optical switch 103, where the first signal converter 101 is configured to convert the first electrical signal into a first optical signal;
one end of the second signal converter 102 is configured to input a second electrical signal corresponding to a second video, and the other end of the second signal converter 102 is connected to a second input end of the optical switch 103, where the second signal converter 102 is configured to convert the second electrical signal into a second optical signal;
the optical switch 103 is used for switching the first input end or the second input end to be communicated with the output end so as to enable one of the first optical signal or the second optical signal to pass through;
the output end of the optical switch 103 is connected to one end of the receiving end 20, and the receiving end 20 is configured to convert the first optical signal or the second optical signal into a third electrical signal.
It should be noted that the first video and the second video may be provided by a video output device, such as a server.
For example, a first video is provided by a first server, a second video is provided by a second server, a first electrical signal corresponding to the first video provided by the first server is input to a first signal converter 101, the first signal converter 101 converts the first electrical signal into a first optical signal, a second electrical signal corresponding to the second video provided by the second server is input to a second signal converter 102, the second signal converter 102 converts the second electrical signal into a second optical signal, the first optical signal is input to a first input terminal of an optical switch 103, the second optical signal is input to a second input terminal of the optical switch 103, the optical switch 103 can switch the first input terminal to be communicated with the output terminal or the second input terminal to be communicated with the output terminal according to a requirement, that is, when the optical switch 103 switches the first input terminal to be communicated with the output terminal, the output end of the optical switch 103 outputs the first optical signal, and accordingly, the receiving end 20 converts the first optical signal into a third electrical signal; when the optical switch 103 switches the second input end to be communicated with the output end, the output end of the optical switch 103 outputs a second optical signal; accordingly, the receiving end 20 converts the second optical signal into a third electrical signal.
It can be understood that, the video electrical signal is converted into the optical signal, and then one of the optical signals is switched to be output through the optical switch, so that the electromagnetic interference during switching is avoided due to the strong anti-interference performance of the optical signal, and the problem of screen flash switching is solved.
The first signal converter 101 and the second signal converter 102 may be electro-optical converters in the art, among others.
Optionally, as shown in fig. 3, the receiving end 20 includes a third signal converter 201;
the output end of the optical switch 103 is connected to a third signal converter 201, and the third signal converter 201 is configured to convert the first optical signal or the second optical signal into a third electrical signal.
Among them, the third signal converter 201 may be an optical-to-electrical converter in the art.
The optical signal is transmitted between the output terminal of the optical switch 103 and the third signal converter 201 through an optical fiber.
Optionally, as shown in fig. 4, the transmitting end 10 further includes an optical splitter 104; the receiving end 20 includes a fourth signal converter 202 and a fifth signal converter 203;
the input end of the optical splitter 104 is connected with the output end of the optical switch 103, the first output end of the optical splitter 104 is connected with the fourth signal converter 202, and the second output end of the optical splitter 104 is connected with the fifth signal converter 203;
the optical splitter 104 is configured to split the first optical signal or the second optical signal output by the optical switch 103 into two optical signals, the fourth signal converter 202 is configured to convert one of the optical signals into a fourth electrical signal, and the fifth signal converter 203 is configured to convert the other of the optical signals into a fifth electrical signal.
It should be noted that, when the output end of the optical switch 103 outputs the first optical signal, the optical splitter 104 splits the first optical signal into two optical signals, the first optical signal is transmitted to the fourth signal converter 202 of the receiving end 20 through the optical fiber, and the fourth optical signal converter 202 converts the first optical signal into a fourth electrical signal corresponding to the first optical signal. The second beam of first optical signals is transmitted to the fifth signal converter 203 of the receiving end 20 through the optical fiber, and the fifth signal converter 203 converts the second beam of first optical signals into a fifth electrical signal.
When the output end of the optical switch 103 outputs the second optical signal, the optical splitter 104 splits the second optical signal into two optical signals, the first optical signal is transmitted to the fourth signal converter 202 of the receiving end 20 through the optical fiber, and the fourth optical signal is converted into a fourth electrical signal corresponding to the first optical signal by the fourth signal converter 202. The second beam of second optical signals is transmitted to the fifth signal converter 203 of the receiving end 20 through the optical fiber, and the fifth signal converter 203 converts the second beam of second optical signals into a fifth electrical signal.
Therefore, through the arrangement of the optical splitter 104, two beams of signals appear at the receiving end, so that the two beams of signals can be used as a main signal and a slave signal, one of the two paths of transmission can be a main transmission path, and the other path can be a slave transmission path, so that the problem of subsequent video display caused by the fact that only single path transmission fails in the transmission process is avoided.
Fig. 5 is a schematic structural diagram of a video transmission system according to an embodiment of the present invention. As shown in fig. 5, the video transmission system 200 includes the dual-device control switch 100 according to any embodiment of the present invention, and further includes: a first video outputter 210, a second video outputter 211, and a display 212;
the dual-computer control switch 100 is respectively connected to the first video output device 210, the second video output device 211 and the display 212, the dual-computer control switch 100 is used for switching and selecting the first video output by the first video output device 210 or the second video output by the second video output device 211, and the display 212 is used for displaying the video selected by the dual-computer control switch 100.
According to an embodiment of the present invention, the first video outputter 210 and the second video outputter 211 are master and slave video outputters. The first video output device 210 may be a first server, and the second video output device 211 may be a second server.
According to an embodiment of the present invention, as shown in fig. 6, the dual-controller switcher 100 further includes an optical switch controller 105;
the optical switch controller 105 is respectively connected to the first video outputter 210 and the second video outputter 211, and is configured to monitor a state of the first video outputter 210 and a state of the second video outputter 211, and control the first input terminal of the optical switch 103 to be communicated with the output terminal of the optical switch 103 or control the second input terminal of the optical switch 103 to be communicated with the output terminal of the optical switch 103 according to the monitoring result.
The monitoring result includes a first state and a second state, the first state is a state in which the first video output device 210 is in a fault state or the first video output device 210 is in a standby state and the second video output device 211 outputs a video; the second state is a state where the second video outputter 211 fails or the second video outputter 211 is standby and the first video outputter 210 outputs video;
the optical switch controller 105 is configured to control the second input end to communicate with the output end of the optical switch 103 according to the first state; the optical switch controller 105 is further configured to control the first input to communicate with the output of the optical switch 103 according to the second state.
That is, in order to prevent the video signal interruption, a master-slave video output device is generally used for backup, when the master video output device fails, the slave video output device may replace the master video output device, or when the slave video output device fails, the master video output device may replace the slave video output device, and the first video output device 210 and the second video output device 211 in the system 200 are the master-slave video output device. The optical switch controller 105 may control the optical switch 103 according to the states of the first video outputter 210 and the second video outputter 211. Specifically, when the first video output device 210 outputs video and the second video output device 211 is in a failure or standby state, the first input terminal of the optical switch 103 may be controlled to communicate with the output terminal to pass the first optical signal. When the second video output device 211 outputs video and the first video output device 210 is in failure or standby, the second input terminal of the optical switch 103 may be controlled to communicate with the output terminal to pass the second optical signal. In other embodiments, the light switch controller 105 may also issue an alert if both the first video output 210 and the second video output 211 fail.
According to an embodiment of the present invention, as shown in fig. 5 and fig. 6, when the receiving terminal 20 of the dual-device controlled switch 100 includes the fourth signal converter 202 and the fifth signal converter 203, the first port of the display 212 is connected to the output terminal of the fourth signal converter 202, and the second port of the display 212 is connected to the output terminal of the fifth signal converter 203.
Optionally, the first port of the display 212 is a DVI port and the second port of the display 212 is an HDMI port.
That is to say, the signals output by the fourth signal converter 202 and the fifth signal converter 203 are the same, and then when the first port and the second port of the display 212 both receive the signal, the display 212 can display, and if one of the ports does not receive the signal, there is a backup signal, so as to avoid the problem that the signal is transmitted and the display of the display 212 is affected. And the two ports of the display 212 are different, and are more compatible with the signal formats converted by the fourth signal converter 202 and the fifth signal converter 203.
The embodiment of the invention also provides a train control display system, which comprises the video transmission system 200 of any embodiment of the invention. That is to say, the video transmission system 200 can be matched with the train control display system to realize that the screen flashing is not performed any more when the video signals are switched, and the backup signals are realized in the signal transmission process, so that the problem that the display video of the display is interrupted due to the fault of the transmission path is avoided.
That is to say, the switching of the video is carried out on the optical path, the switching is simple, and the mechanical device is not easily interfered by the electromagnetic environment. After the optical path is switched, the optical signal is subjected to light splitting processing, and double-path transmission is carried out, so that the principle of double-channel and double-standby is realized.
In summary, according to the dual-machine control switch, the video transmission system and the train control display system provided by the embodiment of the invention, the dual-machine control switch includes: the system comprises a sending end and a receiving end, wherein signals are transmitted between the sending end and the receiving end through optical fibers; the transmitting end comprises a first signal converter, a second signal converter and an optical switch; one end of the first signal converter is used for inputting a first electric signal corresponding to a first video, the other end of the first signal converter is connected with the first input end of the optical switch, and the first signal converter is used for converting the first electric signal into a first optical signal; one end of the second signal converter is used for inputting a second electrical signal corresponding to a second video, the other end of the second signal converter is connected with a second input end of the optical switch, and the second signal converter is used for converting the second electrical signal into a second optical signal; the optical switch is used for switching the first input end or the second input end to be communicated with the output end so as to enable one of the first optical signal or the second optical signal to pass through; the output end of the optical switch is connected with one end of the receiving end, and the receiving end is used for converting the first optical signal or the second optical signal into a third electrical signal. Switch after converting video signal into light signal with the realization, avoided directly switching the signal of telecommunication that video signal corresponds, when using light signal to switch, be difficult to receive electromagnetic environment's interference, the difficult phenomenon that takes place the display and dodge the screen.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A dual-computer controlled switch, comprising: the system comprises a sending end and a receiving end, wherein signals are transmitted between the sending end and the receiving end through optical fibers; the transmitting end comprises a first signal converter, a second signal converter and an optical switch;
one end of the first signal converter is used for inputting a first electric signal corresponding to a first video, the other end of the first signal converter is connected with the first input end of the optical switch, and the first signal converter is used for converting the first electric signal into a first optical signal;
one end of the second signal converter is used for inputting a second electrical signal corresponding to a second video, the other end of the second signal converter is connected with a second input end of the optical switch, and the second signal converter is used for converting the second electrical signal into a second optical signal;
the optical switch is used for switching the first input end or the second input end to be communicated with an output end so as to enable one of the first optical signal or the second optical signal to pass through;
the output end of the optical switch is connected with one end of the receiving end, and the receiving end is used for converting the first optical signal or the second optical signal into a third electric signal.
2. The dual-computer controlled switch of claim 1, wherein the receiving end comprises a third signal converter;
the output end of the optical switch is connected with the third signal converter, and the third signal converter is used for converting the first optical signal or the second optical signal into a third electrical signal.
3. The dual-machine control switcher of claim 1, wherein the transmitting end further comprises an optical splitter; the receiving end comprises a fourth signal converter and a fifth signal converter;
the input end of the optical splitter is connected with the output end of the optical switch, the first output end of the optical splitter is connected with the fourth signal converter, and the second output end of the optical splitter is connected with the fifth signal converter;
the optical splitter is configured to split the first optical signal or the second optical signal output by the optical switch into two optical signals, the fourth signal converter is configured to convert one of the optical signals into a fourth electrical signal, and the fifth signal converter is configured to convert the other of the optical signals into a fifth electrical signal.
4. A video transmission system comprising the dual-machine controlled switch according to any one of claims 1-3, further comprising: a first video output, a second video output and a display;
the dual-computer control switcher is respectively connected with the first video output device, the second video output device and the display, the dual-computer control switcher is used for switching and selecting the first video output by the first video output device or the second video output by the second video output device, and the display is used for displaying the video selected by the dual-computer control switcher.
5. The video transmission system according to claim 4, wherein the first video outputter and the second video outputter are master and slave video outputters of each other.
6. The video transmission system of claim 5, wherein the dual-machine control switch further comprises an optical switch controller;
the optical switch controller is respectively connected with the first video output device and the second video output device, and is used for monitoring the state of the first video output device and the state of the second video output device and controlling the first input end of the optical switch to be communicated with the output end of the optical switch or controlling the second input end of the optical switch to be communicated with the output end of the optical switch according to a monitoring result.
7. The video transmission system according to claim 6, wherein the monitoring result includes a first state and a second state, the first state being a state in which the first video output device is failed or in which the first video output device is standby and the second video output device outputs video; the second state is a state that the second video output device is in failure or standby and the first video output device outputs videos;
the optical switch controller is used for controlling the second input end to be communicated with the output end of the optical switch according to the first state; the optical switch controller is further configured to control the first input end to communicate with the output end of the optical switch according to the second state.
8. The video transmission system according to any of claims 4-7, wherein when the receiving end of the dual-computer controlled switch comprises a fourth signal converter and a fifth signal converter, the first port of the display is connected to the output end of the fourth signal converter, and the second port of the display is connected to the output end of the fifth signal converter.
9. The video transmission system of claim 8, wherein the first port of the display is a DVI port and the second port of the display is an HDMI port.
10. A train control display system comprising a video transmission system according to any one of claims 4 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210383755.9A CN114745517A (en) | 2022-04-12 | 2022-04-12 | Double-machine control switcher, video transmission system and train control display system |
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| CN202210383755.9A CN114745517A (en) | 2022-04-12 | 2022-04-12 | Double-machine control switcher, video transmission system and train control display system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117022405A (en) * | 2023-10-10 | 2023-11-10 | 中国铁道科学研究院集团有限公司通信信号研究所 | Dual-machine control switching system with monitoring function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117022405A (en) * | 2023-10-10 | 2023-11-10 | 中国铁道科学研究院集团有限公司通信信号研究所 | Dual-machine control switching system with monitoring function |
| CN117022405B (en) * | 2023-10-10 | 2024-03-01 | 中国铁道科学研究院集团有限公司通信信号研究所 | Dual-machine control switching system with monitoring function |
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