Urban real scene three-dimensional display device

Abstract

The utility model discloses a kind of urban real scene three-dimensional display devices, including annular curtain, three projectors and fixed ring, the center of fixed ring and the center of annular curtain are located on same axis, fixed ring is fixedly arranged on indoor ceiling, annular curtain is fixedly arranged on indoor ground, one rotating ring is rotatably connected in fixed ring outer side wall, rotating ring bottom is respectively connected with three projectors, fixed ring inner side wall is equipped with a limiting ring for adjusting projector angle, limiting ring is slidably connected with fixed ring, and limiting ring bottom and the front end top of three projectors contact. The utility model can realize 360 continuous projection without dead angle, and projection content can be changed at any time according to three projectors, usually set in indoor exhibition center position, reach best viewing effect, also can be realized good viewing experience by 3D projection cooperation 3D glasses and VR glasses, has good application prospect for urban real scene three-dimensional display.

Description

Technical Field

[0001] This utility model relates to the field of urban surveying and mapping engineering technology, specifically to a three-dimensional display device for urban real-scene. Background Technology

[0002] 3D city reality is a 3D virtual display technology that uses digital cameras to capture multi-angle panoramic images of existing scenes, then stitches them together and loads them into a playback program. 3D city reality will provide a unified digital spatial foundation for applications such as digital twins and City Information Modeling (CIM), and can be applied to various aspects of society, including natural resources, tourism, transportation, national defense, and water conservancy, realistically recreating the real world. Simply put, 3D city reality is building a city in the digital world that is exactly the same as the real one; it is a 3D digital map of a real scene that can comprehensively and three-dimensionally present the current status and spatial distribution of various natural resource elements in the city.

[0003] For on-site 3D urban scene displays, projectors and display screens are generally used. To improve the display effect, there have been many research and development improvements to projectors. For example, patent CN220526558U discloses a 3D model display device, belonging to the field of surveying and mapping engineering technology. It includes: an arc-shaped screen and a projection mechanism. The projection mechanism includes a mounting base and a projector. The arc-shaped screen is located to the left of the projector, and the mounting base is located above the projector. A top plate is rotatably mounted on the top of the projector. A vertical plate and two connecting plates are hinged to the top of the top plate. The vertical plate is fixedly connected to the bottom of the mounting base, and a mounting box is fixedly mounted on the bottom of the mounting base. The same connecting shaft is rotatably connected to the inner walls of the front and rear sides of the mounting box. A worm gear and two turntables are fixedly sleeved on the outer side of the connecting shaft. The angle adjustment and fixation of the projector for 3D model display are easily achieved through the cooperation of the connecting plate, worm, worm wheel, round rod, turntables and positioning rod. The deceleration and self-locking transmission of the worm and worm wheel makes the adjustment more precise and accurate, which is beneficial for the display of 3D models. However, this device has limited control over the projection angle of the projector, making it difficult to achieve a wide range of adjustments. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a three-dimensional urban landscape display device.

[0005] The technical solution of this utility model is:

[0006] A three-dimensional urban scene display device includes a circular screen, multiple projectors arranged in a ring at equal intervals above the circular screen, and a fixing ring above the circular screen to support the projectors. The center of the fixing ring is on the same axis as the center of the circular screen. The fixing ring is fixedly mounted on the indoor ceiling, and the circular screen is fixedly mounted on the indoor floor. A rotating ring is rotatably connected to the outer wall of the fixing ring, and the bottom of the rotating ring is connected to each of the projectors. A limiting ring for adjusting the angle of the projectors is provided on the inner wall of the fixing ring. The limiting ring is slidably connected to the fixing ring, and the bottom of the limiting ring contacts the top front end of each projector.

[0007] Furthermore, the inner wall of the rotating ring is provided with a limiting block, and the outer wall of the fixed ring is provided with a limiting groove, and the limiting block is slidably connected to the limiting groove.

[0008] Explanation: The limiting block and limiting groove ensure that the rotating ring remains stable and does not dislodge when rotating along the fixed ring.

[0009] Furthermore, a fixed bracket is provided on the indoor ceiling on one side of the fixed ring, and a drive motor is provided below the fixed bracket. The output shaft of the drive motor is located at the top of the drive motor and a drive gear is provided at the end of the output shaft. The drive gear meshes with the tooth groove provided on the outer wall of the rotating ring to drive the rotating ring to rotate along the fixed ring.

[0010] Explanation: The drive motor drives the drive gear to rotate, which in turn causes the rotating ring to rotate along the fixed ring.

[0011] Furthermore, a reset spring is provided at the bottom of the rotating ring corresponding to the location of each projector, and the reset spring is fixedly connected to the top rear side of the projector.

[0012] Explanation: By using a return spring as the connecting part between the rotating ring and the projector, the angle can be adjusted by being pushed downward by the limit ring while the projector is rotating, and it can also be reset as the limit ring rises, thus achieving vertical angle adjustment.

[0013] Furthermore, two electro-hydraulic actuators are symmetrically arranged on the indoor ceiling inside the fixed ring. The output end of the electro-hydraulic actuator is connected to the top of the limiting ring. Each projector has a sliding block at the top of its front end for docking with the limiting ring to reduce the friction between the projector and the limiting ring.

[0014] Explanation: The limit ring slides up and down via an electro-hydraulic actuator. A sliding block that mates with the limit ring reduces the friction between the projector and the limit ring.

[0015] Furthermore, the inner sidewall of the fixing ring is symmetrically provided with sliding grooves at both ends, and the outer sidewall of the limiting ring is symmetrically provided with sliders at both ends, and the sliders are slidably connected to the sliding grooves.

[0016] Note: The sliding groove and slider ensure stable up-and-down sliding of the limit ring and prevent it from dislodging.

[0017] Furthermore, there are three projectors, and each projector has a portable power bank with a socket at its bottom.

[0018] Note: By using a portable power bank, you can power the projector, thus avoiding the problem of the power cord getting tangled and intertwined when the projector is rotated or raised, which would occur when the projector is connected to a fixed position.

[0019] The beneficial effects of this utility model are:

[0020] (1) The urban real scene three-dimensional display device of this utility model can achieve 360° continuous projection without dead angle by setting up a circular screen and cooperating with multiple rotatable projectors. The projected content can be changed at any time according to each projector. It is usually set in the indoor exhibition center to achieve the best viewing effect. It can also achieve a good viewing experience by using 3D projection with 3D glasses and VR glasses. It has good application prospects for urban real scene three-dimensional display.

[0021] (2) The urban real scene three-dimensional display device of this utility model optimizes the rotation mode of each projector to realize the synchronous rotation of each projector and complete the angle adjustment synchronously. It is convenient to use and easy for staff to operate and maintain. By using a mobile power supply to replace the traditional fixed socket, the projector can be powered. This avoids the problem of the power cord of the projector being tangled and twisted when the projector is connected to a fixed position. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall top structure of a three-dimensional urban landscape display device according to this utility model;

[0023] Figure 2 This is a schematic diagram of the overall bottom structure of a three-dimensional urban landscape display device according to this utility model;

[0024] Figure 3 This is a schematic diagram of the connection structure between the projector and the rotating ring of a three-dimensional urban scene display device according to this utility model;

[0025] Figure 4 This is a schematic diagram of the connection structure between the limiting block and the limiting groove of a three-dimensional urban scene display device according to this utility model;

[0026] Figure 5This is a schematic diagram of the connection structure between the slider and the slide groove of a three-dimensional urban landscape display device according to this utility model;

[0027] Figure 6 This is a schematic diagram of the electro-hydraulic actuator structure of a three-dimensional urban landscape display device according to this utility model.

[0028] Among them, 1-circular screen, 2-projector, 21-sliding block, 3-fixed ring, 31-limiting groove, 32-sliding groove, 4-rotating ring, 41-limiting block, 42-tooth groove, 43-reset spring, 5-limiting ring, 51-slider, 6-fixed bracket, 61-drive motor, 62-drive gear, 7-electro-hydraulic push rod. Detailed Implementation

[0029] Example 1

[0030] like Figure 1 , 3 As shown in Figures 4 and 5, a three-dimensional urban scene display device includes a circular screen 1, three projectors 2 (existing technology) arranged in a ring at equal intervals above the circular screen 1, and a fixing ring 3 above the circular screen 1 to support the projectors 2. The center of the fixing ring 3 is on the same axis as the center of the circular screen 1. The fixing ring 3 is fixedly mounted on the indoor ceiling, and the circular screen 1 is fixedly mounted on the indoor floor. A rotating ring 4 is rotatably connected to the outer wall of the fixing ring 3. A limiting block 41 is provided on the inner wall of the rotating ring 4, and a limiting groove 31 is provided on the outer wall of the fixing ring 3. The limiting block 41 is slidably connected to the limiting groove 31. The bottom of the rotating ring 4 is respectively connected to the three projectors 2. Projector 2 is connected. At the bottom of the rotating ring 4, a return spring 43 is provided at each of the three locations of the projector 2. The return spring 43 is fixedly connected to the top rear side of the projector 2. A limiting ring 5 for adjusting the angle of the projector 2 is provided on the inner wall of the fixing ring 3. The limiting ring 5 is slidably connected to the fixing ring 3. The inner wall of the fixing ring 3 is symmetrically provided with grooves 32 at both ends. The outer wall of the limiting ring 5 is symmetrically provided with sliders 51 at both ends. The sliders 51 are slidably connected to the grooves 32. The bottom of the limiting ring 5 contacts the top front end of the three projectors 2. Each projector 2 is provided with a power bank 22 with a socket at the bottom. The power bank 22 is a commercially available single-hole five-hole portable power bank.

[0031] like Figure 2 As shown, a fixed bracket 6 is provided on the indoor ceiling on one side of the fixed ring 3. A drive motor 61 is provided below the fixed bracket 6. The drive motor 61 is a commercially available servo motor. The output shaft of the drive motor 61 is located at the top of the drive motor 61 and a drive gear 62 is provided at the end of the output shaft. The drive gear 62 meshes with the tooth groove 42 provided on the outer wall of the rotating ring 4 to drive the rotating ring 4 to rotate along the fixed ring 3.

[0032] like Figure 1 ,6 As shown, two electro-hydraulic actuators 7 are symmetrically arranged on the indoor ceiling inside the fixed ring 3. The electro-hydraulic actuators 7 are commercially available products. The output end of the electro-hydraulic actuator 7 is connected to the top of the limiting ring 5. A sliding block 21 is provided at the top of the front end of the three projectors 2 to dock with the limiting ring 5 and reduce the friction between the projectors 2 and the limiting ring 5.

[0033] Example 2

[0034] The difference between this embodiment and Embodiment 1 is that:

[0035] Projector 2 is set to four.

[0036] Example 3

[0037] The difference between this embodiment and Embodiment 1 is that:

[0038] Projector 2 is set to two.

[0039] Example 4

[0040] The difference between this embodiment and Embodiment 1 is that:

[0041] The electro-hydraulic actuator 7 is configured as three circumferentially spaced rods.

[0042] Working principle:

[0043] The working principle of this utility model's three-dimensional urban landscape display device will be briefly explained below.

[0044] When in use, first adjust each projector 2 to a suitable angle, turn on the two electro-hydraulic push rods 7, and together drive the limit ring 5 to move down, thereby pushing the front end of each projector 2 to move down, and the slider 51 slides in the slide groove 32 to realize the angle adjustment of each projector 2;

[0045] Then, the drive motor 61 is turned on to drive the drive gear 62 to rotate, which in turn drives the rotating ring 4 to rotate under the action of the tooth groove 42. The limit block 41 slides in the limit groove 31, so that each projector 2 can rotate continuously while completing the projection, so that people in the exhibition room can view the complete three-dimensional display effect of the city scene from different angles.

[0046] If the angle of each projector 2 is adjusted while it is rotating, the two electro-hydraulic actuators 7 are activated, which together drive the limiting ring 5 to move down, thereby pushing the front end of each projector 2 to move down. When rotating, the sliding block 21 reduces the friction with the bottom of the limiting ring 5, thereby realizing the adjustment of the angle of the projector 2 during the rotation.

[0047] On the control cabinet assembly located on the ground, there are switches for each projector 2, drive motor 61, and two electro-hydraulic actuators 7. The projector 2 is powered by a portable power bank 22 at its bottom. When the battery power of the portable power bank 22 is low, it can be removed from the bottom of the projector 2 for charging. The removal method is by clip or magnetic attraction. The drive motor 61 is fixed in position, so its power cord is directly connected to the control cabinet. Both electro-hydraulic actuators 7 are controlled to start and stop synchronously by the PLC controller inside the control cabinet assembly. An open-loop synchronous control method (low cost, low precision) is adopted: multiple proportional valves / servo valves are driven by the same PLC output signal, and the two electro-hydraulic actuators 7 are forced to work synchronously through mechanical linkage. For the application scenario of this application, the precision requirement is not high and the load is balanced. Therefore, this method is sufficient to achieve all functional requirements, thereby realizing intelligent control.

[0048] The PLC controller and multiple proportional valves / servo valves are all located inside the control cabinet assembly. The electro-hydraulic actuator 7 needs to rotate synchronously with the rotating ring 4. Therefore, when the angle of the projector 2 does not need to be adjusted, the power cord of the electro-hydraulic actuator 7 is not connected to the control cabinet assembly or the power supply. The electro-hydraulic actuator 7 is not powered by the same mobile power supply 22 as the projector 2 because the electro-hydraulic actuator 7 has a high power and is generally adjusted only once every long period of time. Therefore, a traditional power cord can be used.

[0049] When the angle of projector 2 needs to be adjusted, the staff will disconnect the power cord of the electro-hydraulic actuator 7 and connect it to the control cabinet assembly and power supply. The angle of projector 2 can be adjusted by opening the two electro-hydraulic actuators 7 through the control cabinet assembly. At this time, the electro-hydraulic actuators 7 must not be opened at the same time as the drive motor 61 to avoid the wires getting tangled. That is to say, the function of synchronously adjusting the angle of each projector 2 and the function of synchronously rotating each projector 2 are two independent functional units that are opened independently and cannot be opened at the same time. After the two functional units are adjusted, the optimal projection effect can be achieved.

Claims

1. A three-dimensional urban landscape display device, characterized in that, The device includes a circular screen (1), multiple projectors (2) arranged in a circular pattern at equal intervals above the circular screen (1), and a fixing ring (3) above the circular screen (1) for supporting the projectors (2). The center of the fixing ring (3) and the center of the circular screen (1) are on the same axis. The fixing ring (3) is fixedly installed on the indoor ceiling, and the circular screen (1) is fixedly installed on the indoor floor. A rotating ring (4) is rotatably connected to the outer wall of the fixing ring (3). The bottom of the rotating ring (4) is connected to each of the projectors (2). A limiting ring (5) for adjusting the angle of the projectors (2) is provided on the inner wall of the fixing ring (3). The limiting ring (5) is slidably connected to the fixing ring (3) and the bottom of the limiting ring (5) is in contact with the top of the front end of each projector (2).

2. The urban real-scene three-dimensional display device according to claim 1, characterized in that, The inner wall of the rotating ring (4) is provided with a limiting block (41), and the outer wall of the fixed ring (3) is provided with a limiting groove (31). The limiting block (41) is slidably connected to the limiting groove (31).

3. The urban real-scene three-dimensional display device according to claim 1, characterized in that, A fixed bracket (6) is provided on the indoor ceiling on one side of the fixed ring (3). A drive motor (61) is provided below the fixed bracket (6). The output shaft of the drive motor (61) is located at the top of the drive motor (61) and a drive gear (62) is provided at the end of the output shaft. The drive gear (62) meshes with the tooth groove (42) provided on the outer side wall of the rotating ring (4).

4. The urban real-scene three-dimensional display device according to claim 1, characterized in that, The bottom of the rotating ring (4) is provided with a reset spring (43) at the position of each of the projectors (2), and the reset spring (43) is fixedly connected to the top of the rear side of the projector (2).

5. A three-dimensional urban real-scene display device according to claim 4, characterized in that, Two electro-hydraulic actuators (7) are symmetrically arranged on the indoor ceiling inside the fixed ring (3). The output end of the electro-hydraulic actuator (7) is connected to the top of the limiting ring (5). Each projector (2) has a sliding block (21) at the top of its front end for docking with the limiting ring (5).

6. The urban real-scene three-dimensional display device according to claim 1, characterized in that, The inner sidewall of the fixed ring (3) is symmetrically provided with sliding grooves (32) at both ends, and the outer sidewall of the limiting ring (5) is symmetrically provided with sliders (51) at both ends, and the sliders (51) are slidably connected to the sliding grooves (32).

7. The urban real-scene three-dimensional display device according to claim 1, characterized in that, There are three projectors (2), and each projector (2) has a portable power bank (22) with a socket at the bottom.

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