An architectural sand table based on the combination of 3D virtual vision and real scene

By using a combination of temperature-sensitive paint tape and heating screens in the architectural sandbox, the problem of the physical model being unable to adapt to environmental changes was solved, and diversified display effects were achieved.

CN116863805BActive Publication Date: 2025-09-09GUANGDONG SHANZHITIAN MODEL ART DESIGN CO LTD
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Patent Information

Application Number
CN202310976296.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-08-04
Publication Date
2025-09-09
Estimated Expiration
2043-08-04

AI Technical Summary

Technical Problem

The physical model of the existing architectural sand table cannot adapt to different environments with the virtual sand table to display the status, and the display effect is insufficient.

Method used

The design combines a temperature-sensitive paint layer with a heating screen. The temperature-sensitive paint layer changes color according to temperature changes. The temperature of the physical model is controlled by the heating screen to simulate the display effects of different seasons.

Benefits of technology

The physical sand table and the virtual sand table can be displayed synchronously in different seasons, making the display effect more diverse and not restricted by the actual environment. Different display effects can be simulated when needed.

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Abstract

The present invention relates to an architectural sand table based on the combination of 3D virtual vision and real scenes, comprising a 3D virtual sand table and a physical sand table. The architectural sand table adopts structures such as positioning columns, heating screens, and temperature-sensitive coating layers to realize that the architectural sand table can sense the ambient temperature. Compared with the existing technology, when displaying in different seasons, the physical sand table can display seasonal changes together with the virtual 3D virtual sand table, making the display effect more diverse and better. In addition, with the setting of the heating screen, the heating screen can be controlled to heat under different display requirements, and the physical sand table can be controlled to be at different temperatures, thereby forming different appearances, adapting to different seasons, and making the display effect better. In addition, the temperature of the physical sand table is controllable, so that the display effects in different seasons are not restricted by the actual environment. Different display effects can be simulated when needed, making the display effect more diverse and better.
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Description

Technical Field

[0001] The present invention relates to a construction sand table, and in particular to a construction sand table based on the combination of 3D virtual vision and real scene, which is applied in the field of construction sand tables. Background Art

[0002] A brief introduction to the existing technology and identification of problems.

[0003] An architectural model, also known as an architectural sand table, represents architectural art in the form of a miniature entity. Whether it is a single shape or a group combination, it faithfully expresses the structure of architectural ideas and transforms the architect's intention into a concrete image. However, in the prior art, an architectural sand table generally only serves as a display, simply displaying the building, and the display effect is poor.

[0004] To solve the problem of poor architectural sand table display effects, the Chinese invention patent CN201220681026.3 specification discloses "A three-dimensional virtual digital sand table and physical sand table interactive integrated system". By combining the virtual and the physical, multimedia displays, interactive functions and audio equipment are added to the traditional sand table model to enhance the visitors' visual and auditory experience.

[0005] However, in the existing technology, only the virtual sand table can simulate the building conditions under different scenarios, such as different display effects in spring, summer, autumn and winter. The physical model can only maintain one display state regardless of the environment, so that the display effect of the building sand table in the existing products still cannot provide a good display effect.

[0006] Application Contents

[0007] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the physical building sand table cannot adapt to different environments and display different states together with the virtual building sand table.

[0008] To solve the above problems, the present invention provides an architectural sandbox based on the combination of 3D virtual vision and real scene, including a simulation display terminal and a physical sandbox. The server of the simulation display terminal is equipped with three-dimensional simulation software, and a 3D virtual sandbox is simulated by the three-dimensional simulation software. The physical sandbox is connected to the server signal of the simulation display terminal. The physical sandbox includes a chassis and a plurality of physical models arranged on the chassis. The physical models include a building model and a plant model. The upper surfaces of the building model and the plant model are both affixed with a layer of temperature-sensitive paint tape. Grooves are drilled at the upper and lower ends of the chassis, and a heat insulation board is fixedly connected to the top of the lower groove. A plurality of upper limit holes are drilled in the middle of the chassis, and a plurality of lower limit holes corresponding to the plurality of upper limit holes are drilled on the heat insulation board. The upper limit holes correspond to the lower limit holes. A positioning column is inserted in the upper limit hole, and the lower end of the positioning column extends into the lower limit hole. The bottom of the positioning column corresponds to the heating mesh plate. The physical model and the positioning column correspond to each other, match, and adsorb.

[0009] In the above-mentioned architectural sand table that combines 3D virtual vision with real scenes, the setting of the temperature-sensitive paint layer enables the architectural sand table to sense the ambient temperature, so that when displayed in different seasons, the physical sand table can display the seasonal changes together with the virtual 3D virtual sand table, making the display effect more diverse and better.

[0010] As a further improvement of the present application, the inner diameter of the upper limit hole is smaller than the inner diameter of the lower limit hole, and the positioning column has an interference fit with the upper limit hole, which can effectively limit the positioning column and make it difficult to loosen on the chassis, effectively ensuring the stability of the solid model connected thereto.

[0011] As a further improvement of the present application, the temperature-sensitive coating layer on the upper surface of the plant model is set to multiple layers, and two layers overlap each other, so that the surface of the plant model can show different color changes at different temperatures.

[0012] As a further improvement of the present application, the temperature-sensitive coating tape layer includes a transparent base tape and a temperature-sensitive coating layer coated on the transparent base tape. The transparent base tape is made of high-temperature resistant material. The color of the temperature-sensitive coating layer on each transparent base tape and the critical temperature of the color change are different, and the critical temperature gradually decreases from bottom to top. The critical temperature difference of the color change of two adjacent temperature-sensitive coating layers is not less than 10°C. By setting temperature-sensitive coating layers with different critical temperatures on the temperature-sensitive coating tape layer, the state of the surface of the physical model can change with the change of temperature. For example, at low temperatures, the surface appears white, which is the display state when it snows in winter. When the temperature is higher in autumn, it can appear yellow, reflecting the seasonal characteristics and making the display effect better.

[0013] As another improvement to this application, a heating screen is fixedly embedded in the insulation board, with the bottom of the positioning column corresponding to the heating screen. The heating screen includes multiple parallel heating plates, which are snapped into the lower openings of the corresponding lower limit holes. The heating screen is electrically connected to an external power source via wires. To meet different display requirements, the heating screen can be controlled to heat the physical sand table at different temperatures, thereby forming different appearances to adapt to different seasons and achieve better display effects.

[0014] As another improved supplement to the present application, a slot is bored at the bottom of both the building model and the plant model, a magnetic piece is fixedly embedded at the top of the slot, and the maximum height of the exposed upper end of the positioning column is greater than the depth of the slot, so that after the magnetic piece at the bottom of the physical model is plugged into the positioning column, an extrusion force can be generated on the positioning column, causing it to move downward and contact the corresponding insulation board. By electrifying the insulation board to generate heat, the temperature of the physical model can be controlled at will, so that the display effects in different seasons are not restricted by the actual environment, and different display effects can be simulated when needed.

[0015] As another improved supplement to the present application: the positioning column includes an upper thermal head, a lower thermal cover fixedly connected to the lower end of the upper thermal head, a staggered thermal string arranged in the lower thermal cover, and an outer limit ring fixedly connected to the lower end of the lower thermal cover, one end of the staggered thermal string is fixedly connected to the lower end of the upper thermal head, and the other end of the staggered thermal string is fixedly connected to the bottom of the lower thermal cover. The staggered thermal string is used for heat conduction, so that the heat generated by the heating plate can be transferred along it to the physical model, so that the temperature-sensitive coating layer on the physical model can better undergo adaptive changes.

[0016] As another improved supplement to the present application: the upper end of the outer limit ring contacts the top of the lower limit hole, and when the two contact each other, the bottom of the lower control strip protrusion does not contact the heating plate, effectively ensuring that the positioning column of the unplugged building model is not easily affected by the heat when the heating plate is heated, and the height of the lower limit hole is greater than twice the height of the outer limit ring. The staggered heat-conducting string includes an upper control concave strip fixedly connected to the lower end of the upper heat-conducting head, a lower control strip protrusion fixedly connected to the lower end of the lower heat-conducting cover, and a plurality of shaped heat-conducting wires fixedly connected between the lower control strip protrusions and the upper control concave strips.

[0017] As another improved supplement to the present application: the cross-sections of the bottom of the lower control strip convex piece, the upper control concave strip piece and the upper heat conducting head are all triangular structures, and the multiple shaped thermal conductive wires are all made of ferromagnetic metal materials. When the building model and the positioning column are plugged into each other, the magnetic sheet generates an adsorption force on the multiple shaped thermal conductive wires, causing them to move upward. At this time, the top is in contact with the bottom of the upper heat conducting head through the upper control concave strip piece, and when the upper ends of the multiple shaped thermal conductive wires are in contact with the triangular structure at the bottom of the upper heat conducting head, the bottoms of the multiple shaped thermal conductive wires are flush with each other. Under the action of the magnetic attraction force of the magnetic sheet, the shaped thermal conductive wires move upward, causing the bottom of the lower control strip convex piece to gradually flatten due to the downward protruding triangular shape. During plugging, downward force is applied to the building model to stabilize its connection with the positioning column. The positioning column is squeezed downward, causing the bottoms of the shaped thermal conductive wires to be flush with each other and stably contact the surface of the heating plate, thereby facilitating the transfer of heat to the physical model.

[0018] To sum up, through the setting of the temperature-sensitive paint layer, the architectural sand table can sense the ambient temperature. Compared with the existing technology, when displaying in different seasons, the physical sand table can display the changes of seasons together with the virtual 3D virtual sand table, making the display effect more diverse and better. In addition, with the setting of the heating mesh plate, the heating mesh plate can be controlled to heat under different display requirements, and the physical sand table can be controlled to be at different temperatures, thereby forming different appearances, adapting to different seasons, and making the display effect better. Moreover, the temperature of the physical sand table is controllable, so that the display effect in different seasons is not restricted by the actual environment, and different display effects can be simulated when needed, making the display effect more diversified and better. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the first embodiment of the present application;

[0020] Figure 2 This is a front view of the physical sandbox of the first embodiment of this application;

[0021] Figure 3 This is a three-dimensional diagram of the chassis of the physical sandbox according to the first embodiment of the present application;

[0022] Figure 4 A schematic diagram of a multi-layer temperature-sensitive coating layer above a plant model according to a first embodiment of the present application;

[0023] Figure 5 This is a cross-sectional view of the chassis of the physical sandbox according to two embodiments of the present application;

[0024] Figure 6 A half-cut perspective view of the chassis of the physical sandbox according to two embodiments of the present application;

[0025] Figure 7 Schematic diagram of the two embodiments of the present application when the physical model is installed on the chassis;

[0026] Figure 8 Schematic diagram of the portion of the positioning post not connected to the physical model according to two embodiments of the present application;

[0027] Figure 9 sectional views of positioning posts according to two embodiments of the present application;

[0028] Figure 10 This is a cross-sectional view of the bottom of the positioning column in contact with the heating plate according to two embodiments of the present application.

[0029] Description of the numbers in the figure:

[0030] 1 chassis, 2 positioning column, 21 upper thermal head, 22 outer limit ring, 231 upper control concave strip, 232 shaped thermal wire, 233 lower control strip protrusion, 24 lower thermal cover, 31 upper limit hole, 32 lower limit hole, 33 groove, 4 thermal insulation board, 41 heating plate, 5 magnetic plate, 51 card slot, 61 transparent bottom belt, 62 temperature sensitive coating layer. DETAILED DESCRIPTION

[0031] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0032] The first implementation method:

[0033] An architectural sand table based on the combination of 3D virtual vision and real scene. Figure 1-2 The main components of the architectural sandbox are shown in the figure. Figure a represents a 3D virtual sandbox, figure b represents a physical sandbox, and figure c represents a physical model. The figure includes a simulation display terminal and a physical sandbox. The simulation display terminal's server is equipped with 3D simulation software, which simulates a 3D virtual sandbox. The physical sandbox is connected to the simulation display terminal's server by signal. The physical sandbox includes a chassis 1 and multiple physical models mounted on the chassis 1. The physical models include building models and plant models. The upper surfaces of the building models and plant models are affixed with a layer of temperature-sensitive coating. In this architectural sandbox that combines 3D virtual vision with real scenes, the temperature-sensitive coating layer enables the architectural sandbox to sense the ambient temperature. This allows the physical sandbox to display seasonal changes along with the virtual 3D sandbox during different seasons, making the display more diverse and effective.

[0034] The temperature sensitive coating layer includes a transparent base tape 61 and a temperature sensitive coating layer 62 coated on the transparent base tape 61. The transparent base tape 61 is made of a high temperature resistant material, such as Figure 4The color and critical temperature of the color change of the temperature-sensitive paint layer 62 on each transparent base strip 61 are different, and the critical temperature gradually decreases from bottom to top. The critical temperature difference of the color change of two adjacent temperature-sensitive paint layers 62 is not less than 10°C. By setting the temperature-sensitive paint layers 62 with different critical temperatures on the temperature-sensitive paint strip layer, the state of the surface of the physical model can change with the change of temperature. For example, at low temperatures, the surface appears white, showing the display state of snow in winter. When the temperature is higher in autumn, it can appear yellow, reflecting the seasonal characteristics and making the display effect better.

[0035] As a further improvement of the present application, the temperature-sensitive coating layer on the upper surface of the plant model is set to be multiple layers, and two layers overlap each other, so that the surface of the plant model can show different color changes at different temperatures, such as Figure 4 From bottom to top, the color of the topmost temperature-sensitive paint layer is preferably white, and its critical temperature is no higher than 5°C. At low temperatures, the upper surface of the physical model appears white, which can simulate the winter state of snow falling on the upper surface of the physical sand table. The color of the middle temperature-sensitive paint layer is preferably green, and its critical temperature is 5-15°C. When the ambient temperature is at this temperature, it can appear green, thereby spontaneously simulating the spring state. The bottom layer can preferably be yellow, and its critical temperature is 15-25°C, which can simulate the main state of autumn.

[0036] The green color can also be subdivided into light green and dark green, representing spring and summer respectively. The specific multi-layer settings can be set according to actual needs.

[0037] See also Figure 5-6 Grooves 33 are carved at both ends of the chassis 1, and the top of the lower groove 33 is fixedly connected to the heat insulation board 4. A plurality of upper limit holes 31 are carved in the middle of the chassis 1, and a plurality of lower limit holes 32 corresponding to the plurality of upper limit holes 31 are carved on the heat insulation board 4. The upper limit holes 31 correspond to the lower limit holes 32. A positioning column 2 is inserted into the upper limit hole 31, and the lower end of the positioning column 2 extends into the lower limit hole 32. The bottom of the positioning column 2 corresponds to the heating mesh plate, and the physical model and the positioning column 2 correspond to each other and are matched and adsorbed.

[0038] The inner diameter of the upper limit hole 31 is smaller than that of the lower limit hole 32, and the positioning column 2 is interference fit with the upper limit hole 31, which can effectively limit the positioning column 2, making it difficult to loosen on the chassis 1, effectively ensuring the stability of the physical model connected thereto.

[0039] See also Figure 7The bottom of the building model and the plant model are both provided with a slot 51, and a magnetic piece 5 is fixedly embedded in the top of the slot 51. The maximum height of the exposed upper end of the positioning column 2 is greater than the depth of the slot 51, so that after the magnetic piece 5 at the bottom of the physical model is plugged into the positioning column 2, an extrusion force can be generated on the positioning column 2, causing it to move downward and contact with the corresponding insulation board 4. By electrifying and heating the insulation board 4, the temperature of the physical model can be controlled at will, so that the display effect in different seasons is not restricted by the actual environment, and different display effects can be simulated when needed.

[0040] Second implementation method:

[0041] like Figure 5-6 A heating screen is fixedly embedded within the insulation board 4, with the bottom of the positioning column 2 aligned with the heating screen. The heating screen comprises multiple parallel heating plates 41, which snap into place below the corresponding lower limit holes 32. The heating screen is electrically connected to an external power source via wires. To meet different display needs, the heating screen can be controlled to heat the physical sand table at different temperatures, thereby creating different appearances and adapting to different seasons, resulting in a better display effect.

[0042] See also Figure 8-9 The positioning column 2 includes an upper heat-conducting head 21, a lower heat-conducting cover 24 fixedly connected to the lower end of the upper heat-conducting head 21, a staggered heat-conducting string arranged in the lower heat-conducting cover 24, and an outer limit ring 22 fixedly connected to the lower end of the lower heat-conducting cover 24. One end of the staggered heat-conducting string is fixedly connected to the lower end of the upper heat-conducting head 21, and the other end of the staggered heat-conducting string is fixedly connected to the bottom of the lower heat-conducting cover 24. The staggered heat-conducting string is used to conduct heat, so that the heat generated by the heating plate 41 can be transferred along it to the physical model, so that the temperature-sensitive paint layer on the physical model can better undergo adaptive changes.

[0043] like Figure 8 The upper end of the outer limit ring 22 contacts the top of the lower limit hole 32, and when the two contact each other, the bottom of the lower control strip protrusion 233 does not contact the heating plate 41, effectively ensuring that the positioning column 2 of the unplugged building model is not easily affected by the heat when the heating plate 41 is heated, and the height of the lower limit hole 32 is greater than twice the height of the outer limit ring 22. The staggered heat-conducting string includes an upper control concave strip 231 fixedly connected to the lower end of the upper heat-conducting head 21, a lower control strip protrusion 233 fixedly connected to the lower end of the lower heat-conducting cover 24, and a plurality of shaped heat-conducting wires 232 respectively fixedly connected between the lower control strip protrusion 233 and the upper control concave strip 231.

[0044] The lower control strip convex piece 233, the upper control concave strip piece 231 and the bottom cross section of the upper heat conducting head 21 are all triangular structures, and the plurality of shaped heat conducting wires 232 are all made of ferromagnetic metal materials, such as Figure 10When the building model and the positioning column 2 are plugged into each other, the magnetic sheet 5 generates an adsorption force on the multiple shaped thermal conductive wires 232, causing them to move upward. At this time, the top is in contact with the bottom of the upper heat-conducting head 21 through the upper control concave strip 231, and the upper ends of the multiple shaped thermal conductive wires 232 are in contact with the triangular structure at the bottom of the upper heat-conducting head 21. The bottoms of the multiple shaped thermal conductive wires 232 are flush with each other. Under the action of the magnetic attraction of the magnetic sheet 5, the shaped thermal conductive wires 232 move upward, causing the bottom of the lower control strip protrusion 233 to gradually flatten due to its downwardly protruding triangular shape. During plugging, downward force is applied to the building model to stabilize its connection with the positioning column 2. The positioning column 2 is squeezed downward, causing the bottoms of the shaped thermal conductive wires 232 to be flush with each other and stably contact the surface of the heating plate 41, thereby facilitating heat transfer to the physical model.

[0045] In summary, through the setting of the temperature-sensitive coating layer, the architectural sand table can sense the ambient temperature. Compared with the existing technology, when displaying in different seasons, the physical sand table can display the changes of seasons together with the virtual 3D virtual sand table, making the display effect more diverse and better. In addition, with the setting of the heating mesh plate, the heating mesh plate can be controlled to heat under different display requirements, and the physical sand table can be controlled to be at different temperatures, thereby forming different appearances, adapting to different seasons, and making the display effect better. Moreover, the temperature of the physical sand table is controllable, so that the display effect in different seasons is not restricted by the actual environment, and different display effects can be simulated when needed, making the display effect more diversified and better.

[0046] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. An architectural sand table based on the combination of 3D virtual vision and real scene, comprising a simulation display terminal and a physical sand table, wherein the server of the simulation display terminal is equipped with 3D simulation software, and a 3D virtual sand table is simulated by the 3D simulation software, and the physical sand table is connected to the server of the simulation display terminal by signal, characterized in that: The physical sandbox comprises a chassis (1) and a plurality of physical models arranged on the chassis (1), the physical models comprising a building model and a plant model, the upper surfaces of the building model and the plant model are both affixed with a temperature-sensitive coating layer, the chassis (1) is provided with grooves (33) at both ends, the top of the groove (33) below is fixedly connected with a heat insulation board (4), the middle of the chassis (1) is provided with a plurality of upper limit holes (31) extending upward and downward, the heat insulation board (4) is provided with a plurality of lower limit holes (32) corresponding to the plurality of upper limit holes (31), the upper limit holes (31) and the lower limit holes (32) correspond to each other, a positioning column (2) is inserted into the upper limit hole (31), the lower end of the positioning column (2) extends into the lower limit hole (32), and the bottom of the positioning column (2) corresponds to the heating mesh plate, and the physical model and the positioning column (2) are mutually matched and adsorbed; The temperature-sensitive coating layer on the upper surface of the plant model is arranged as a plurality of layers, and two layers are overlapped with each other. The temperature-sensitive coating layer comprises a transparent base tape (61) and a temperature-sensitive coating layer (62) coated on the transparent base tape (61). The transparent base tape (61) is made of a high-temperature resistant material. The color and the critical temperature of the color change of each temperature-sensitive coating layer (62) on the transparent base tape (61) are different, and the critical temperature gradually decreases from bottom to top. The critical temperature difference of the color change of two adjacent temperature-sensitive coating layers (62) is not less than 10°C.

2. The architectural sand table based on the combination of 3D virtual vision and real scene according to claim 1, characterized in that: The inner diameter of the upper limit hole (31) is smaller than the inner diameter of the lower limit hole (32), and the positioning column (2) is interference-fitted with the upper limit hole (31).

3. The architectural sand table based on the combination of 3D virtual vision and real scene according to claim 1, characterized in that: A heating mesh is fixedly embedded in the heat insulation plate (4), and the bottom of the positioning column (2) corresponds to the heating mesh. The heating mesh includes a plurality of heating plates (41) connected in parallel. The heating plates (41) are clamped at the lower openings of the corresponding lower limit holes (32), and the heating mesh is electrically connected to an external power supply through a wire.

4. The architectural sand table based on the combination of 3D virtual vision and real scene according to claim 3, characterized in that: The bottoms of the building model and the plant model are both provided with a slot (51), the top of the slot (51) is fixedly inlaid with a magnetic sheet (5), and the maximum height of the exposed upper end of the positioning column (2) is greater than the depth of the slot (51).

5. The architectural sand table based on the combination of 3D virtual vision and real scene according to claim 4, characterized in that: The positioning column (2) comprises an upper heat conducting head (21), a lower heat conducting cover (24) fixedly connected to the lower end of the upper heat conducting head (21), a staggered heat conducting string arranged in the lower heat conducting cover (24), and an outer limiting ring (22) fixedly connected to the lower end of the lower heat conducting cover (24), one end of the staggered heat conducting string is fixedly connected to the lower end of the upper heat conducting head (21), and the other end of the staggered heat conducting string is fixedly connected to the bottom of the lower heat conducting cover (24).

6. The architectural sand table based on the combination of 3D virtual vision and real scene according to claim 5, characterized in that: The upper end of the outer limiting ring (22) contacts the top of the lower limiting hole (32), and when the two contact each other, the bottom of the lower control strip protrusion (233) does not contact the heating plate (41), and the height of the lower limiting hole (32) is greater than twice the height of the outer limiting ring (22). The staggered heat-conducting string comprises an upper control concave strip (231) fixedly connected to the lower end of the upper heat-conducting head (21), a lower control strip protrusion (233) fixedly connected to the lower end of the lower heat-conducting cover (24), and a plurality of shaped heat-conducting wires (232) respectively fixedly connected between the lower control strip protrusion (233) and the upper control concave strip (231).

7. The architectural sand table based on the combination of 3D virtual vision and real scene according to claim 6, characterized in that: The cross-sections of the bottom of the lower control strip convex piece (233), the upper control concave strip (231) and the upper heat conducting head (21) are all triangular structures, and the plurality of shaped heat conducting wires (232) are all made of ferromagnetic metal material. When the upper ends of the plurality of shaped heat conducting wires (232) are in contact with the triangular structure of the bottom of the upper heat conducting head (21), the bottoms of the plurality of shaped heat conducting wires (232) are flush with each other.

Citation Information

Patent Citations

  • Interactive system integrating three-dimensional virtual digital sand table and physical sand table

    CN203038557U

  • Augmented reality sand table system

    CN114203004A

  • Thermoelectric driven sand table model

    CN205541622U