Remote video switching device and display system

Abstract

The utility model relates to a remote video switching device and a display system. The remote video switching device comprises a first power supply module; a coil of the first relay receives a remote video switching control signal; a coil of the second relay is connected with a feedback output end of the video switcher after completing video switching; the positive pole output end of the second power module is connected with one end of the coil of the time relay, the negative pole output end of the second power module is connected with the other end of the coil of the time relay through an interlocking branch, the interlocking branch comprises a first branch and a second branch which are connected in parallel, and the first branch comprises a normally open switch of a first relay and a normally closed switch of a second relay which are connected in series; the second branch comprises a normally closed switch of the first relay and a normally open switch of the second relay which are connected in series; a normally-closed switch or a normally-open switch of the time relay is connected to the video switching control end of the video switcher and used for controlling video switching. According to the utility model, remote video switching can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of video switching, in particular to a remote video switching device and a display system. Background Art

[0002] At present, with the rapid development of science and technology, monitors have become an indispensable part of work and life. With the development of science and technology, automation and intelligence have become the mainstream of the times. In modern workshops, in order to better display the results of automation and intelligence, it is usually achieved through monitors. Sometimes, in order to achieve the desired effect, different results need to be displayed, so it is necessary to switch or cut the video, which is generally achieved by using a video switcher. However, the current video switcher has the following problems in screen switching in the automation system:

[0003] (1) Automatic control cannot be achieved: Currently, video switching is generally achieved through buttons on the video switcher or switches on the remote control. This method can only achieve video switching locally or in a relatively close area. In addition, there is no interface reserved for interaction with other automation systems on the video switcher and its accessories, so automatic control of video switching cannot be achieved.

[0004] (2) Poor openness of remote control: Existing video switchers can only switch videos through local buttons or through tablets, but they have poor versatility. Whether it is local control or tablet control, no universal interface is provided for automated control, and the openness is poor.

[0005] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0006] In order to solve the above technical problems, one of the purposes of the present invention is to provide a remote video switching device capable of realizing remote video switching.

[0007] In order to solve the above technical problems, the utility model proposes the following technical solutions:

[0008] The present application relates to a remote video switching device, which is used to implement remote video switching of a video switch, and includes:

[0009] A first power supply module, which is used to supply power to the video switch;

[0010] a first relay, whose coil receives a remote video switching control signal;

[0011] A second relay, whose coil is connected to the feedback output terminal of the video switch after the video switching is completed;

[0012] A second power supply module, wherein the positive output end thereof is connected to one end of the coil of the time relay, and the negative output end thereof is connected to the other end of the coil of the time relay via an interlocking branch, wherein the interlocking branch comprises a first branch and a second branch connected in parallel, wherein the first branch comprises a normally open switch of the first relay and a normally closed switch of the second relay connected in series, and the second branch comprises a normally closed switch of the first relay and a normally open switch of the second relay connected in series;

[0013] The normally closed switch or normally open switch of the time relay is connected to the video switching control terminal of the video switcher for controlling video switching.

[0014] In some embodiments of the present application, the remote video switching device further includes:

[0015] A voltage converter is connected between the feedback output terminal and the coil of the second relay, and is used for converting the voltage signal output by the feedback output terminal into a voltage signal used by the coil of the second relay.

[0016] In some embodiments of the present application, the feedback output terminal outputs a +3.3V DC voltage;

[0017] The voltage converter is used to convert a +3.3V DC voltage into a +24V DC voltage.

[0018] In some embodiments of the present application, the first power module is used to convert an AC power source into a first DC power source;

[0019] The second power supply module is used to convert the AC power supply into a second DC power supply.

[0020] In some embodiments of the present application, a circuit breaker is connected to the power supply line of the AC power source.

[0021] In some embodiments of the present application, the remote video switching device includes:

[0022] A fuse is connected to the power supply line of the AC power source. One end of the circuit breaker is connected to the AC power source and the other end is connected to the fuse.

[0023] In some embodiments of the present application, the remote video switching device further includes:

[0024] A box, in which each component of the remote video switching device is arranged;

[0025] An IO interface is internally connected to the coil of the first relay in the box and externally connected to a remote control device for outputting the remote video switching control signal.

[0026] The remote video switching device provided by the present application uses a time relay, a first relay and a second relay in combination. When a remote video switching control signal is received, the first relay is energized, so that the second power supply module supplies power to the time relay. After the time relay is energized, its normally open switch or normally closed switch is actuated, and after a delay period, a fixed pulse is sent to the video switcher, so that the video switcher switches the video signal. After the video switching is completed, the feedback output terminal outputs a feedback signal and energizes the second relay. In this way, since the time relay is energized under the interlocking of the first relay and the second relay, when the second relay is energized, the time relay loses power, thus completing the remote video switching.

[0027] In the present application, a fixed pulse sent by a time relay is used to simulate a remote video switching control signal, wherein the fixed pulse includes fixed high and low levels, thereby improving the effectiveness and reliability of video switching.

[0028] The present application relates to a display system, comprising:

[0029] A display for displaying video;

[0030] The remote video switching device as described above, wherein the video switch in the remote video switching device is used to switch the video displayed on the display;

[0031] A control system is connected to the remote video switching device and is used to send a remote video switching control signal to the remote video switching device.

[0032] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments of the utility model or the description of the prior art. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A circuit diagram of a remote video switching device proposed by the utility model;

[0035] Figure 2 A schematic diagram of a remote video switching device proposed by the utility model;

[0036] Figure 3 A schematic diagram of a display system proposed by the utility model;

[0037] Reference numerals:

[0038] 110. Remote video switching device; 111. First power module; 112. Second power module; 113. Video switch; 114. Voltage converter; 115. Circuit breaker; 116. Fuse; 117. Box; 118. IO interface; 119. First branch; 119', second branch; 120. Display; 130. Control system. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0040] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0042] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0043] In order to realize remote video switching based on the video switcher 113 and facilitate remote operation, the present application relates to a remote video switching device 110 .

[0044] The remote video switching device 110 is used to remotely switch videos on the video switch 113 .

[0045] See also Figure 1 The remote video switching device 110 includes a first power module 111, a first relay KA1, a second relay KA2, a second power module 112 and a time relay KT1.

[0046] The first power module 111 is used to provide power to the video switch 113 . In the present application, the first power module 111 is used to convert AC power into DC power (eg, DC 5V power) for use by the video switch 113 .

[0047] The first relay KA1 and the second relay KA2 are intermediate relays.

[0048] The first relay KA1 includes a first coil KA1, a first normally open switch KA1 and a first normally closed switch KA1. When the first coil KA1 is energized, the first normally open switch KA1 is closed and the first normally closed switch KA1 is opened, and when the first coil KA1 is de-energized, the first normally open switch KA1 is opened and the first normally closed switch KA1 is closed.

[0049] The second relay KA2 includes a second coil KA2, a second normally open switch KA2 and a second normally closed switch KA2. When the second coil KA2 is energized, the second normally open switch KA2 is closed and the second normally closed switch KA2 is opened, and when the second coil KA2 is de-energized, the second normally open switch KA2 is opened and the second normally closed switch KA2 is closed.

[0050] The first coil KA1 of the first relay KA1 receives the remote video switching control signal PLC_DO. When receiving the remote video switching control signal PLC_DO, the first coil KA1 of the first relay KA1 is energized, and at this time, the first normally open switch KA1 is closed and the first normally closed switch KA1 is opened.

[0051] In order to simulate the remote video switching, the time relay KT1 is introduced.

[0052] The second power module 112 is used to provide electrical energy to the time relay KT1. In the present application, the second power module 112 is used to convert AC power into DC power (eg, DC 24V power) for use by the time relay KT1.

[0053] An interlocking branch is also arranged in series on the power supply line for supplying power to the time relay KT1. The interlocking branch includes a first branch 119 and a second branch 119' arranged in parallel.

[0054] The first branch 119 includes a first normally open switch KA1 and a second normally closed switch KA2 connected in series, and the second branch 119 ′ includes a first normally closed switch KA1 and a second normally open switch KA2 connected in series.

[0055] When the first relay KA1 is energized, the first normally open switch KA1 is closed and the first normally closed switch KA1 is opened. At this time, since the second relay KA2 is not energized, the first branch 119 is connected and the second branch 119' is disconnected. The second power supply module 112 supplies power to the time relay KT1 through the first branch 119, that is, when the remote video switching control signal PLC_DO is received, the coil of the time relay KT1 is energized.

[0056] After the coil of time relay KT1 is energized, its normally closed switch (if it is a normally closed switch KT1, then after the coil is energized, the normally closed switch KT1 is disconnected, similar to the local switch button being switched and popped up after being pressed) or normally open switch KT1 (if it is a normally open switch KT1, then after the coil is energized, the normally open switch KT1 is closed, similar to the local switch button being switched and pressed) operates, and outputs a fixed pulse after a fixed time delay until the power supply to the coil of time relay KT1 is removed.

[0057] Among them, the fixed time is specifically set according to the time relay KT1, and the fixed pulse is a pulse with high and low levels.

[0058] The high and low levels ensure the reliability of video switching and avoid the problem of switching failure caused by a single low level or a single high level.

[0059] The second coil KA2 of the second relay KA2 is connected to the feedback output terminal fb of the video switcher 113. When the video switching is completed, a voltage signal indicating that the switching is completed is output at the feedback output terminal fb.

[0060] After the switching is completed, the voltage signal output by the feedback output terminal fb provides electrical energy to the second coil KA2 of the second relay KA2. At this time, the second coil KA2 of the second relay KA2 is energized, the second normally closed switch KA2 is disconnected, and the second normally open switch KA2 is closed. Therefore, at this time, the first branch 119 is disconnected, and the coil of the time relay KT1 loses power, indicating that the video switching is completed.

[0061] In the present application, in order to ensure reliable power supply to the second coil KA2 of the second relay KA2, the remote video switching device 110 also includes a voltage converter 114, which is used to convert the voltage signal output by the feedback output terminal fb into a voltage signal used by the second coil KA2 of the second relay KA2.

[0062] In the present application, the voltage signal outputted by the feedback output terminal fb is 3.3V, and the voltage converter 114 is used to convert the 3.3V DC voltage signal into a 24V DC voltage signal.

[0063] In some embodiments of the present application, the first power module 111 is an AC-to-DC module, which is used to convert AC power into a first DC power, such as a 5V DC voltage; the second power module 112 is also an AC-to-DC module, which is used to convert AC power into a second DC power, such as a 24V DC voltage.

[0064] In order to ensure power supply control of the remote video switching device 110 , a circuit breaker 115 is provided on the power supply line of the AC power supply for controlling the on and off of the input power of the remote video switching device 110 .

[0065] When the circuit breaker 115 is disconnected, the AC power source cannot transmit AC power to the first power module 111 and the second power module 112 . When the circuit breaker 115 is closed, the AC power source transmits AC power to the first power module 111 and the second power module 112 .

[0066] In order to ensure stable power supply, a fuse 116 is also provided on the power supply line of the AC power supply.

[0067] To facilitate the wiring of the remote video switching device 110, see Figure 2 The remote video switching device 110 can be set as a box 117, and the box 117 is provided with wiring terminals, which form an IO interface 118. The IO interface 118 is internally connected to the first coil KA1 in the box 117 and externally connected to the remote video switching control signal PLC_DO.

[0068] The remote video switching control signal PLC_DO may be issued by a remote control system such as a Programmable Logic Controller (PLC) or a Distributed Control System (DCS).

[0069] The control system can be controlled via the IO interface 118 and the remote video switching device 110 to achieve remote automatic control switching.

[0070] An open IO interface 118 is provided, and other devices or systems can perform video switching control through the IO mode, thus facilitating remote video switching control.

[0071] The remote video switching device 110 provided in the present application broadens the application scenario of the video switcher 113, which can switch locally or remotely. When switching remotely, the external control system is directly connected through the IO interface 118, which facilitates wiring.

[0072] In some embodiments of the present application, see Figure 3 , also relates to a display system, including a display 120, a remote video switching device 110 and a control system 130.

[0073] The display 120 is mainly used to display pictures or videos to people. It can use a general computer monitor, TV, or industrial large screen. It is connected to the video switch 113 in the remote video switching device 110 through an HDMI cable or other cables. It mainly displays the automation and intelligent effects in the workshop, such as: workpiece scanning point cloud, automatic production line real-time data, etc.

[0074] Remote video switching device for reference Figure 1 and Figure 2 And the remote video switching device 110 as described above.

[0075] The control system 130 (eg, a PLC control system, a DCS control system) is an automatic control system for the entire factory or workshop, and is mainly used to automatically control the production lines or equipment of the entire factory or workshop.

[0076] The control system 130 can control the video switch 113 in the remote video switching device 110 to correspondingly switch the video on the PC1 or PC2 and display it on the display 120 .

[0077] As described above, PC1 and PC2 are only shown as examples, and other numbers of PCs may be provided. Whether the video of PC1 is switched to the video of PC2 or the video of PC2 is switched to the video of PC1 may be controlled by the control system 130 .

[0078] The control system 130 can realize remote automatic control of video switching by performing IO interaction with the video switch 113.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A remote video switching device, used for implementing remote video switching of a video switch, characterized in that: include: A first power supply module, which is used to supply power to the video switch; a first relay, whose coil receives a remote video switching control signal; A second relay, whose coil is connected to the feedback output terminal of the video switch after the video switching is completed; A second power supply module, wherein the positive output end thereof is connected to one end of the coil of the time relay, and the negative output end thereof is connected to the other end of the coil of the time relay via an interlocking branch, wherein the interlocking branch comprises a first branch and a second branch connected in parallel, wherein the first branch comprises a normally open switch of the first relay and a normally closed switch of the second relay connected in series, and the second branch comprises a normally closed switch of the first relay and a normally open switch of the second relay connected in series; The normally closed switch or normally open switch of the time relay is connected to the video switching control terminal of the video switcher for controlling video switching.

2. The remote video switching device according to claim 1, characterized in that: The remote video switching device also includes: A voltage converter is connected between the feedback output terminal and the coil of the second relay, and is used for converting the voltage signal output by the feedback output terminal into a voltage signal used by the coil of the second relay.

3. The remote video switching device according to claim 2, characterized in that: The feedback output terminal outputs a +3.3V DC voltage; The voltage converter is used to convert a +3.3V DC voltage into a +24V DC voltage.

4. The remote video switching device according to claim 1, characterized in that: The first power supply module is used to convert the AC power supply into a first DC power supply; The second power supply module is used to convert the AC power supply into a second DC power supply.

5. The remote video switching device according to claim 4, characterized in that: A circuit breaker is connected to the power supply line of the AC power source.

6. The remote video switching device according to claim 5, characterized in that: The remote video switching device comprises: A fuse is connected to the power supply line of the AC power source. One end of the circuit breaker is connected to the AC power source and the other end is connected to the fuse.

7. The remote video switching device according to claim 1, characterized in that: The remote video switching device also includes: A box, in which each component of the remote video switching device is arranged; The IO interface is internally connected to the coil of the first relay in the box and externally connected to the remote video switching control signal.

8. A display system, characterized in that: include: A display for displaying video; The remote video switching device according to any one of claims 1 to 7, wherein the video switch in the remote video switching device is used to switch the video displayed on the display; A control system is connected to the remote video switching device and is used to send a remote video switching control signal to the remote video switching device.

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