An anti-sway system for suspending and moving displays

Abstract

This invention provides an anti-sway system for a suspended display screen, comprising: a folding display screen suspended in mid-air; a lifting component for moving the folding display screen up and down; a height sensor for acquiring the ground clearance data of the folding display screen; a walking component for synchronously translating the folding display screen; a programmable logic controller (PLC) for obtaining swing length data based on the received ground clearance data; an anti-sway controller for obtaining speed data of the lifting component and the walking component based on the received swing length data and a target speed command, and transmitting the obtained speed data of the lifting component and the walking component to the PLC; and the PLC controlling the speed of the lifting component and the walking component based on the received speed data. This invention can prevent the swaying problem of the folding display screen during high-altitude suspended movement.

Description

Technical Field

[0001] This utility model relates to the field of display screen technology, and in particular to an anti-sway system for display screen suspension and movement. Background Technology

[0002] With the continuous advancement of technology, LED displays have stood out among numerous display devices due to their significant advantages such as high brightness, seamless splicing, and rich colors, gradually replacing traditional splicing screens and projection equipment, and are widely used in various industries. Especially in sports stadiums and stage performances, the application of LED displays is becoming increasingly widespread.

[0003] In existing technologies, LED displays are suspended via a hoisting system to perform lifting, lowering, and translational movements. A trolley in the hoisting system drives the suspended LED display horizontally along a track. During acceleration and deceleration of the trolley, the suspended LED display, due to its own weight and inertia, always lags behind the trolley's movement, creating an angle between them. Under the influence of gravity, this causes the LED display to sway back and forth. However, this swaying accelerates mechanical wear, increases the LED display's lifespan, and may even lead to safety accidents.

[0004] Therefore, it is necessary to provide an anti-sway system for the suspended movement of a display screen to solve the aforementioned problems in the prior art. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an anti-sway system for the hanging and walking of a display screen, so as to solve the technical problem that the back-and-forth swaying of the display screen in the prior art leads to mechanical wear and increased walking time.

[0006] To solve the above-mentioned technical problems, this utility model provides an anti-sway system for the suspension and movement of a display screen, comprising:

[0007] A folding display screen that is suspended in mid-air;

[0008] A lifting component, connected to the folding display screen, is used to drive the folding display screen to perform lifting and lowering movements;

[0009] The sensor assembly includes a height sensor for acquiring ground clearance data of the folding display screen;

[0010] A walking component, connected to the lifting component, is used to drive the lifting component to perform translational movement, thereby driving the folding display screen to perform synchronous translational movement;

[0011] A programmable logic controller, communicatively connected to the lifting assembly, the height sensor, and the walking assembly, is used to obtain swing length data based on the received ground clearance data of the folding display screen;

[0012] An anti-sway controller, communicatively connected to the programmable logic controller (PLC), is used to obtain speed data of the lifting component and the walking component based on the received swing length data and target speed command transmitted by the PLC, and transmit the obtained speed data of the lifting component and the walking component to the PLC; the PLC controls the speed of the lifting component and the walking component based on the received speed data of the lifting component and the walking component to suppress the swaying of the folding display screen.

[0013] The anti-sway system for suspending and moving displays provided by this utility model has the following beneficial effects:

[0014] A height sensor measures the ground clearance of the foldable display screen in real time and transmits the measured data to a programmable logic controller (PLC). The PLC dynamically calculates the swing length based on the received real-time ground clearance data and sends this calculated swing length to an anti-sway controller. The anti-sway controller calculates the speed curves of the lifting and traveling components needed to eliminate the swaying of the foldable display screen during suspended movement based on the received swing length data and the target speed command. It then outputs the speed data of the lifting and traveling components to the PLC based on these calculated speed curves. The PLC controls the speed of the lifting and traveling components based on the received speed data, preventing the foldable display screen from swaying during high-altitude suspended movement, thereby reducing mechanical wear, accelerating the movement of the foldable display screen, and improving the efficiency and safety of high-altitude suspended movement.

[0015] Furthermore, the lifting assembly includes a lifting drive and a first frequency converter communicatively connected to the lifting drive, the first frequency converter being communicatively connected to the programmable logic controller.

[0016] Furthermore, the walking assembly includes a walking drive and a second frequency converter communicatively connected to the walking drive, the second frequency converter being communicatively connected to the programmable logic controller.

[0017] Furthermore, the programmable logic controller, the first frequency converter, and the second frequency converter are all equipped with a Profibus-DP interface.

[0018] Furthermore, the sensor assembly also includes a first encoder and a second encoder. The first encoder is disposed on the lifting drive component and is used to acquire the rotational speed information of the lifting drive component. The second encoder is disposed on the walking drive component and is used to acquire the rotational speed information of the walking drive component.

[0019] Furthermore, the lifting assembly also includes a drum and a wire rope. The drum is connected to the drive shaft of the lifting drive component. One end of the wire rope is fixedly connected to one end of the drum and is wound around the outer circumference of the drum. The other end of the wire rope is fixedly connected to the folding display screen.

[0020] Furthermore, it also includes a support frame, on which multiple lifting components are mounted; both ends of the support frame are respectively fixedly connected to the corresponding walking components.

[0021] Furthermore, it also includes a guide rail, on which the walking component is slidably disposed.

[0022] Furthermore, both the programmable logic controller and the anti-sway controller are equipped with Ethernet interfaces.

[0023] Furthermore, the altitude sensor is a laser rangefinder. Attached Figure Description

[0024] Figure 1 This is a block diagram of an anti-sway system for a suspended display screen according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the signal transmission of an anti-sway system for a suspended display screen according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the walking process of the folding display screen according to an embodiment of the present utility model;

[0027] Figure 4 This is a schematic diagram of the speed curve output by the anti-sway controller in an embodiment of the present invention;

[0028] Figure 5 This is a partial structural schematic diagram of an anti-sway system for a suspended display screen, according to an embodiment of the present invention.

[0029] Component designation explanation

[0030] 10. Folding display screen; 20. Lifting assembly; 21. Lifting drive; 22. First frequency converter; 23. Drum; 24. Steel wire rope; 30. Sensor assembly; 31. Height sensor; 32. First encoder; 33. Second encoder; 40. Walking assembly; 41. Walking drive; 42. Second frequency converter; 50. Programmable logic controller; 60. Anti-sway controller; 70. Bracket; 80. Guide rail. Detailed Implementation

[0031] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0032] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model. The following detailed description should not be considered restrictive, and the scope of the embodiments of this application is limited only by the claims of the published patents. The terminology used herein is for describing specific embodiments only and is not intended to limit this application. Spatial terms such as "upper," "lower," "left," "right," "below," "below," "lower part," "above," "upper part," etc., may be used in the text to illustrate the relationship between one element or feature shown in the figures and another element or feature.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "holding" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of the stated feature, operation, element, component, item, kind, and / or group, but do not preclude the presence, occurrence, or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition arise only when combinations of elements, functions, or operations are inherently mutually exclusive in some manner.

[0035] Before providing a further detailed description of this utility model, the nouns and terms used in the embodiments of this utility model are explained, and the nouns and terms used in the embodiments of this utility model are subject to the following interpretations:

[0036] <1> Programmable Logic Controller (PLC): A digital computing electronic system specifically designed for industrial environments, used for automated control.

[0037] <2> PROFIBUS-DP (Process Field Bus - Decentralized Peripherals) interface: A high-speed, real-time fieldbus system widely used in industrial automation for data exchange between PLCs and various sensors and actuators. It supports a master-slave communication mode, where the master station controls the communication scheduling of the entire network, while the slave stations respond to the master station's requests. PROFIBUS-DP features high-speed data transmission and good anti-interference capabilities, making it suitable for inter-device communication in automation systems.

[0038] <3> Laser rangefinder: A device that uses lasers to measure distance. It calculates distance by emitting a laser beam and measuring the time it takes for the laser to travel from emission to reception and back.

[0039] like Figures 1-5 As shown, an embodiment of this utility model provides an anti-sway system for a suspended display screen, comprising: a folding display screen 10 suspended in mid-air, a lifting assembly 20, a sensor assembly 30, a walking assembly 40, a programmable logic controller 50, and an anti-sway controller 60.

[0040] The lifting assembly 20 is connected to the folding display screen 10 and is used to drive the folding display screen 10 to move up and down. The sensor assembly 30 includes a height sensor 31 for acquiring the ground clearance data of the folding display screen 10. The walking assembly 40 is connected to the lifting assembly 20 and is used to drive the lifting assembly 20 to perform translational movement, thereby driving the folding display screen 10 to perform synchronous translational movement. The programmable logic controller 50 is communicatively connected to the lifting assembly 20, the height sensor 31, and the walking assembly 40, and is used to obtain swing length data based on the received ground clearance data of the folding display screen 10. The anti-sway controller 60 is communicatively connected to the programmable logic controller 50, and is used to obtain the speed data of the lifting assembly 20 and the walking assembly 40 based on the swing length data and the target speed command transmitted by the programmable logic controller 50, and transmit the obtained speed data of the lifting assembly 20 and the walking assembly 40 to the programmable logic controller 50. The programmable logic controller 50 controls the speed of the lifting assembly 20 and the walking assembly 40 based on the received speed data of the lifting assembly 20 and the walking assembly 40 to suppress the swaying of the folding display screen 10.

[0041] To better introduce the anti-sway system for display screen suspension and movement of this utility model, the following is a combination of... Figure 3 and Figure 4 The working principle of this utility model will be explained in detail below:

[0042] The folding display screen 10 is approximated as a simple pendulum model. When the folding display screen 10 runs with a certain acceleration, it oscillates with a certain oscillation period. Applying a short pulse of equal magnitude and duration at half the oscillation period will eliminate the oscillation. Specifically, the anti-sway controller 60 calculates the oscillation period of the folding display screen 10 based on the received pendulum length data and gravitational acceleration. At the initial stationary moment of the folding display screen 10, a pulse force is applied to cause it to oscillate; at half the oscillation period, a pulse force in the opposite direction to the initial pulse is applied to counteract the oscillation—this is the double-pulse principle. The anti-sway controller 60 calculates the speed curves of the lifting component 20 and the traveling component 40 based on the target speed command and the pulse force required to counteract the oscillation calculated using the double-pulse principle (e.g., ...). Figure 4 (As shown); The programmable logic controller 50 controls the speed of the lifting assembly 20 and the traveling assembly 40 based on the received speed data, so that the lifting assembly 20 and the traveling assembly 40 operate according to the corresponding speed curves (e.g., Figure 3 The walking component 40 shown moves in the direction indicated by the arrow, thereby dynamically adjusting the speed command to enable the folding display screen 10 to effectively counteract swaying and move smoothly during the movement.

[0043] like Figure 1 and Figure 2 As shown, in some embodiments of this utility model, the lifting assembly 20 includes a lifting drive component 21 and a first frequency converter 22 communicatively connected to the lifting drive component 21. The first frequency converter 22 is communicatively connected to a programmable logic controller 50. Specifically, the programmable logic controller 50 transmits the speed data of the lifting assembly 20 received from the anti-sway controller 60 to the first frequency converter 22. The first frequency converter 22 controls the speed of the lifting drive component 21 according to the received speed data of the lifting assembly 20, thereby achieving precise execution of dual-pulse commands by the lifting drive component 21. For example, the lifting drive component 21 is a motor.

[0044] like Figure 1 and Figure 2 As shown, in some embodiments of this utility model, the walking component 40 includes a walking drive component 41 and a second frequency converter 42 communicatively connected to the walking drive component 41. The second frequency converter 42 is communicatively connected to a programmable logic controller 50. Specifically, the programmable logic controller 50 transmits the speed data of the walking component 40 received from the anti-sway controller 60 to the second frequency converter 42. The second frequency converter 42 adjusts the speed of the walking drive component 41 according to the received speed data of the walking component 40, thereby achieving precise execution of dual-pulse commands by the walking drive component 41. Exemplarily, the walking drive component 41 is a motor.

[0045] By synchronously controlling the lifting drive component 21 and the walking drive component 41, the two can drive the folding display screen 10 to move in coordination, suppressing the swaying of the folding display screen 10 during the hanging and walking process, so that the folding display screen 10 can move smoothly.

[0046] like Figure 2 As shown, in some embodiments of this utility model, the programmable logic controller 50, the first frequency converter 22, and the second frequency converter 42 are all equipped with a Profibus-DP interface. By providing Profibus-DP interfaces on the programmable logic controller 50, the first frequency converter 22, and the second frequency converter 42, efficient data communication between the programmable logic controller 50 and the first and second frequency converters 22 is achieved. Specifically, the programmable logic controller 50 acts as the master station, responsible for managing network communication and coordinating the operation of the frequency converters; the first and second frequency converters 22 act as slave stations, receiving control commands from the programmable logic controller 50 and providing feedback on their operating status.

[0047] like Figure 2As shown, in some embodiments of this utility model, the sensor assembly 30 further includes a first encoder 32 and a second encoder 33. The first encoder 32 is disposed on the lifting drive component 21 and is used to acquire the rotational speed information of the lifting drive component. The second encoder 33 is disposed on the walking drive component 41 and is used to acquire the rotational speed information of the walking drive component 41. By setting the first encoder 32 on the lifting drive component 21 and the second encoder 33 on the walking drive component 41, and both the first encoder 32 and the second encoder 33 are communicatively connected to the programmable logic controller 50, the rotational speed information of the lifting drive component 21 and the walking drive component 41 can be monitored in real time, and the rotational speed information of the lifting drive component 21 and the walking drive component 41 can be fed back to the programmable logic controller 50 in real time, thereby ensuring that the programmable logic controller 50 can accurately control the movement speed of the lifting assembly 20 and the walking assembly 40.

[0048] like Figure 5 As shown, in some embodiments of this utility model, the lifting assembly 20 further includes a drum 23 and a steel wire rope 24. The drum 23 is connected to the drive shaft of the lifting drive component 21. One end of the steel wire rope 24 is fixedly connected to one end of the drum 23, and the steel wire rope 24 is wound around the outer circumference of the drum 23. The other end of the steel wire rope 24 is fixedly connected to the folding display screen 10. Specifically, when the lifting drive component 21 operates, its drive shaft drives the drum 23 to rotate clockwise, for example, causing the steel wire rope 24 to be wound around the outer circumference of the drum 23, thereby driving the folding display screen 10 to move upward; the drive shaft of the lifting drive component 21 drives the drum 23 to rotate counterclockwise, for example, causing the steel wire rope 24 to be released from the drum 24, thereby driving the folding display screen 10 to move downward. By precisely controlling the lifting drive component 21, the winding and unwinding actions of the steel wire rope 24 are controlled, thereby suppressing the swaying of the folding display screen 10 during the hanging and lifting process.

[0049] like Figure 5 As shown, the folding display screen 10 is moved by a "fighting screen" suspension method. The folding structure itself helps to maintain the synchronization and basic stability of the screen during movement, which provides a better foundation for the active anti-sway control of the folding display screen 10 by the anti-sway system of this utility model for hanging and moving the display screen, and is also safer.

[0050] like Figure 5As shown in some embodiments of this utility model, the anti-sway system for the suspended movement of the display screen further includes a bracket 70. Multiple lifting components 20 are disposed on the bracket 70. Both ends of the bracket 70 are fixedly connected to corresponding moving components 40. For example, one bracket 70 corresponds to four lifting components 20, forming four suspension points for the folding display screen 10, thereby driving the folding display screen 10 to move up and down. Both ends of the bracket 70 are connected to a set of moving components 40, which drive the bracket 70 to move horizontally, and the bracket 70 drives the lifting components 20 to move horizontally, which in turn drive the folding display screen 10 to move horizontally.

[0051] like Figure 5 As shown, in some embodiments of this utility model, the anti-sway system for the suspended movement of the display screen further includes a guide rail 80. The walking component 40 is slidably disposed on the guide rail 80. Exemplarily, the walking component 40 is a trolley. A trolley is fixedly connected to each end of the bracket 70, and the trolley slides on the guide rail 80 to drive the lifting component 20 and the folding display screen 10 to move horizontally. By precisely controlling the speed of the trolley, the trolley accelerates and decelerates according to the received speed, thereby suppressing the swaying of the folding display screen 10 during movement.

[0052] like Figure 1 As shown, in some embodiments of this utility model, both the programmable logic controller 50 and the anti-sway controller 60 are equipped with Ethernet interfaces. In this embodiment, the programmable logic controller 50 and the anti-sway controller 60 communicate via Ethernet (UDP / IP protocol), enabling the programmable logic controller 50 to send the calculated swing length data to the anti-sway controller 60 and to receive the speed data of the lifting component 20 and the walking component 40 calculated by the anti-sway controller 60, thus achieving fast and accurate data transmission between the two.

[0053] like Figure 1 and Figure 2 As shown, in some embodiments of this invention, the height sensor 31 is a laser rangefinder. Using a laser rangefinder to measure the ground clearance of the folding display screen 10 is simple and efficient. Exemplarily, the laser rangefinder is communicatively connected to the first frequency converter 22, transmitting the measured real-time height data to the first frequency converter 22, which then transmits it to the programmable logic controller 50. Alternatively, the laser rangefinder can directly transmit the obtained real-time height data to the programmable logic controller 50.

[0054] For example, the programmable logic controller 50 obtains the target speed command from a host computer (e.g., a human-machine interface) and transmits the received target speed command to the anti-sway controller 60. It should be noted that the programmable logic controller 50 dynamically calculates the swing length data based on the received real-time ground clearance data, which is performed in accordance with existing technology and will not be elaborated here.

[0055] It is worth noting that the anti-sway system for hanging and moving a display screen provided by this utility model is a hardware system. It can be used alone or in combination with existing software programs, but this utility model itself does not involve any innovation in software technology.

[0056] In summary, addressing the technical problems of mechanical wear and increased transport time caused by the back-and-forth swaying of the display screen in existing technologies, this utility model provides an anti-sway system for the suspended movement of a display screen. A height sensor measures the ground clearance of the folding display screen in real time and transmits the measured data to a programmable logic controller (PLC). The PLC dynamically calculates the swing length based on the received real-time ground clearance data and sends this calculated swing length data to an anti-sway controller. The anti-sway controller calculates the speed curves of the lifting and traveling components required to eliminate the swaying of the folding display screen during suspended movement based on the received swing length data and a target speed command. It then outputs the speed data of the lifting and traveling components to the PLC based on these calculated speed curves. The PLC controls the speed of the lifting and traveling components based on the received speed data. Specifically, by dynamically adjusting the wire rope winding and unwinding and the speed of the trolley motor, resonance is suppressed. This prevents the folding display screen from swaying during high-altitude suspended movement, thereby reducing mechanical wear, completing the movement of the folding display screen faster, and improving the efficiency and safety of high-altitude suspended movement of the folding display screen. Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0057] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An anti-sway system for a suspended display screen, characterized in that, include: A folding display screen that is suspended in mid-air; A lifting component, connected to the folding display screen, is used to drive the folding display screen to perform lifting and lowering movements; The sensor assembly includes a height sensor for acquiring ground clearance data of the folding display screen; A walking component, connected to the lifting component, is used to drive the lifting component to perform translational movement, thereby driving the folding display screen to perform synchronous translational movement; A programmable logic controller, communicatively connected to the lifting assembly, the height sensor, and the walking assembly, is used to obtain swing length data based on the received ground clearance data of the folding display screen; An anti-sway controller, communicatively connected to the programmable logic controller (PLC), is used to obtain speed data of the lifting component and the walking component based on the received swing length data and target speed command transmitted by the PLC, and transmit the obtained speed data of the lifting component and the walking component to the PLC; the PLC controls the speed of the lifting component and the walking component based on the received speed data of the lifting component and the walking component to suppress the swaying of the folding display screen.

2. The anti-sway system for suspending and moving a display screen according to claim 1, characterized in that, The lifting assembly includes a lifting drive and a first frequency converter that is communicatively connected to the lifting drive, and the first frequency converter is communicatively connected to the programmable logic controller.

3. The anti-sway system for suspending and moving a display screen according to claim 2, characterized in that, The walking assembly includes a walking drive and a second frequency converter communicatively connected to the walking drive, the second frequency converter being communicatively connected to the programmable logic controller.

4. The anti-sway system for suspending and moving a display screen according to claim 3, characterized in that, The programmable logic controller, the first frequency converter, and the second frequency converter are all equipped with Profibus-DP interfaces.

5. The anti-sway system for suspending and moving a display screen according to claim 3, characterized in that, The sensor assembly further includes a first encoder and a second encoder. The first encoder is disposed on the lifting drive component and is used to acquire the rotational speed information of the lifting drive component. The second encoder is disposed on the walking drive component and is used to acquire the rotational speed information of the walking drive component.

6. The anti-sway system for suspending and moving a display screen according to claim 2, characterized in that, The lifting assembly also includes a drum and a wire rope. The drum is connected to the drive shaft of the lifting drive component. One end of the wire rope is fixedly connected to one end of the drum and is wound around the outer circumference of the drum. The other end of the wire rope is fixedly connected to the folding display screen.

7. The anti-sway system for suspending and moving a display screen according to claim 1, characterized in that, It also includes a support frame, on which multiple lifting components are mounted; both ends of the support frame are fixedly connected to the corresponding walking components.

8. The anti-sway system for suspending and moving a display screen according to claim 1, characterized in that, It also includes a guide rail, on which the walking component is slidably mounted.

9. The anti-sway system for suspending and moving a display screen according to claim 1, characterized in that, Both the programmable logic controller and the anti-sway controller are equipped with Ethernet interfaces.

10. The anti-sway system for a suspended display screen as described in claim 1, characterized in that, The altitude sensor is a laser rangefinder.

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