Multimedia intelligent interactive digital sand table

Abstract

The application relates to the technical field of intelligent interactive digital sand tables, and discloses a multimedia intelligent interactive digital sand table which comprises a base, a plurality of sensor fusion blocks are mounted on the inner wall of the base, one end of the sensor fusion blocks is provided with a lens, the outer side of the lens is provided with a lens shell, a sand table carrier is fixedly mounted on the inner wall of the base, the outer side of the base is provided with a touch screen, and the multimedia intelligent interactive digital sand table further comprises an abnormality prevention part arranged on the outer side of the lens. The distance between the back shrinkage of the electric telescopic rod is shortened, the corrugated elastic plate is pulled back to move, the corrugated elastic plate, the scraping head and the lens are matched, the lowest point of one end of the lens is finally moved to the highest point with the largest diameter, the lens is gradually and closely attached, the outer side of the lens is wiped by the scraping head, the outer side of the lens is wiped by the scraping head in the case of being attached to the lens, dust on the outer side of the lens is wiped off, the projection of the lens is prevented from being blurred by the dust, and the definition of the image is ensured.

Description

Technical Field

[0001] This invention relates to the field of intelligent interactive digital sand table technology, specifically to a multimedia intelligent interactive digital sand table. Background Technology

[0002] Intelligent interactive digital sand tables are digital display tools that integrate multiple technologies such as sound, light, electricity, images, 3D animation, and computer programming. Through dynamic visualization, real-time interaction, and immersive experiences, they provide users with intuitive and efficient information presentation and decision support. Traditional digital physical sand tables use physical models to display geographical or planning information, but they suffer from static immutability, limited information, and poor interactivity. With the development of digital technology, they are gradually being replaced. Some sand tables have adopted projection or screens to replace physical models. However, there are still problems that urgently need to be solved:

[0003] For example, in actual operation, due to poor ventilation in the exhibition space and failure to clean the floor in time, dust in the air will adhere to the lens surface with the airflow, as well as fabric fibers, human hair and other objects in the surrounding environment. These will be attracted to the lens by static electricity. If not cleaned for a long time, the dust, fabric fibers, fingerprints and other objects on the lens surface will cause irregular scattering of the projected light on the surface, making the edges of the image blurry and causing light spots, which will affect the clarity of the projection effect. Summary of the Invention

[0004] This invention provides a multimedia intelligent interactive digital sand table. It uses the telescopic force of an electric telescopic rod to remove dust from the outside of the lens, preventing interference with the projection of the digital sand table's display image, which may be blurry or have light spots. At the same time, it uses driving force to stabilize the lens, thereby improving stability and display effect.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] In a first aspect, a multimedia intelligent interactive digital sand table includes a base, a plurality of sensor fusion blocks are installed on the inner wall of the base, a lens is provided at one end of each sensor fusion block, a lens housing is provided on the outer side of the lens, a sand table carrier is fixedly installed on the inner wall of the base, and a touch screen is provided on the outer side of the base, further comprising:

[0007] An anomaly prevention unit is located on the outside of the lens to prevent the projected digital sand table from becoming blurry or flickering;

[0008] The anti-abnormality unit includes a wiping component and a recycling component. The wiping component is located on the outside of the lens. The wiping component is connected to the anti-static component, and the anti-static component is located on the inside of the lens housing.

[0009] A fixing part is provided on the outside of the lens and located inside the lens housing to fix the lens;

[0010] The fixing part includes a driving component and a stabilizing component. The driving component is disposed on the outside of the lens and located on the inside of the lens housing. The driving component is connected to the stabilizing component, which is disposed on the outside of the lens.

[0011] An auxiliary part, located inside the lens housing, is used for blowing dust off the lens and converting electrical signals into tactile feedback.

[0012] The auxiliary part includes a docking component and a blowing component. The docking component is disposed inside the lens housing and is connected to the blowing component. The blowing component is disposed on one side of the docking component.

[0013] Furthermore, the wiping element includes:

[0014] A corrugated elastic plate is installed on the inner wall of the lens housing;

[0015] The scraping head is located at one end of the corrugated elastic plate;

[0016] The clips are symmetrically fixed on the outside of the scraping head.

[0017] Furthermore, the wiping component also includes:

[0018] A connector pin is used to fix one end of the clip head.

[0019] The mounting component is fixedly installed on one side of the corrugated elastic plate and located inside the lens housing;

[0020] The assembly box is located on the outside of the lens and on the inner wall of the lens housing.

[0021] Furthermore, the recyclable component includes:

[0022] Scraper 1 is located on the inner wall of the scraping head;

[0023] Scraper 2 is located on one side of scraper 1;

[0024] The scraper blade 1 has an annular groove inside, and the annular groove extends through the scraper blade 2 to collect dust.

[0025] The suction component is located on the inner wall of scraper two to suck up residual dust;

[0026] Furthermore, the suction component includes:

[0027] Piston cylinders are symmetrically arranged on the inner wall of scraper two.

[0028] The suction tube is located below the piston cylinder;

[0029] The piston rod is located inside the piston cylinder;

[0030] Piston plates are disposed on the inner wall of the piston cylinder;

[0031] The connecting bar is located on the outside of the piston rod and above the elastic drive ring;

[0032] The piston cylinder, piston rod, suction tube, elastic drive ring, and piston plate are all annular in shape.

[0033] Furthermore, the driving element includes:

[0034] The protective sleeve is fixedly installed on top of the assembly box;

[0035] The electric telescopic rod is installed on the inner wall of the protective cylinder and located inside the lens housing;

[0036] One end of the electric telescopic rod is connected to the corrugated elastic plate;

[0037] A motor is installed on one side of the electric telescopic pole and is connected to the motor drive end.

[0038] Furthermore, the stabilizer includes:

[0039] The upright frame is located below the assembly box;

[0040] A collar is installed on the outside of the electric telescopic pole;

[0041] The traction bar is located on the inside of the upright and is connected to the collar.

[0042] Furthermore, the stabilizer also includes:

[0043] The hook rod, with the traction bar running through it, is installed on the inside of the upright frame;

[0044] The clamp body is located on the outside of the sensor fusion block and is connected to the lens housing;

[0045] The first telescopic plate is located on the inner side of the clamp body;

[0046] The second telescopic piece is located inside the first telescopic piece.

[0047] Furthermore, the docking component includes:

[0048] The annular tube, which is circular in shape, is located inside the lens housing.

[0049] There are two keyholes, symmetrically arranged on the inner wall of the annular cylinder.

[0050] The diameter of the keyhole is matched with the diameter of the pin.

[0051] Furthermore, the blowing element includes:

[0052] The rubber bladder is located inside the assembly box and on one side of the upright; the pipe runs through the assembly box and is fixed to one side of the rubber bladder.

[0053] An ultrasonic transmitter is located on the inner side of scraper two;

[0054] The skin sensor is fixed to the top of the ultrasonic transmitter.

[0055] The above-described solution of the present invention has at least the following beneficial effects:

[0056] The electric telescopic rod retracts to shorten the distance and pulls the corrugated elastic plate back. In conjunction with the corrugated elastic plate, the scraper head, and the lens, the lowest point of the lens moves towards the highest point of its largest diameter, gradually tightening the fit. This allows the scraper head to wipe the outside of the lens. With the lens in close contact, the scraper head removes dust from the outside of the lens, preventing dust from blurring the lens projection and ensuring image clarity. Attached Figure Description

[0057] The invention will now be further described with reference to the accompanying drawings.

[0058] Figure 1 This is a schematic diagram of the overall three-dimensional structure provided in an embodiment of the present invention;

[0059] Figure 2 A three-dimensional structural diagram of the sensor fusion block, lens housing, lens and clamp assembly provided in an embodiment of the present invention;

[0060] Figure 3 A cross-sectional schematic diagram of the lens housing, corrugated elastic plate, and scraping head assembly provided in an embodiment of the present invention;

[0061] Figure 4 This is a cross-sectional schematic diagram of the mounting component, lens housing, and clamp assembly provided in an embodiment of the present invention;

[0062] Figure 5 This is provided by the embodiments of the present invention. Figure 4 Enlarged schematic diagram of the local structure at point C;

[0063] Figure 6 This is a schematic diagram of the assembly box, electric telescopic rod, corrugated elastic plate, and scraping head assembly provided in an embodiment of the present invention;

[0064] Figure 7 This is a three-dimensional cross-sectional structural diagram of the lens housing, electric telescopic rod, and clamp body assembly provided in an embodiment of the present invention;

[0065] Figure 8 This is provided by the embodiments of the present invention. Figure 7 Enlarged schematic diagram of a local structure at point A;

[0066] Figure 9This is a three-dimensional structural diagram of the combination of the first telescopic piece and the second telescopic piece provided in an embodiment of the present invention;

[0067] Figure 10 This is a schematic diagram of the deformation structure of the first and second telescopic plates provided in an embodiment of the present invention;

[0068] Figure 11 This is a three-dimensional schematic diagram of the combined structure of the traction bar, upright frame, and hook rod provided in an embodiment of the present invention;

[0069] Figure 12 This is a three-dimensional schematic diagram of the combined structure of scraper one and scraper two with piston cylinder provided in an embodiment of the present invention;

[0070] Figure 13 This is a three-dimensional exploded view of the internal structure of the elastic drive ring and scraper II provided in an embodiment of the present invention;

[0071] Figure 14 This is a side view of the internal cross-section of scraper one, scraper two, and elastic drive ring provided in an embodiment of the present invention;

[0072] Figure 15 This is provided by the embodiments of the present invention. Figure 9 Schematic diagram of the local structure at point H;

[0073] Figure 16 This is a schematic diagram showing the internal unfolding of the plug and lock hole combination structure provided in an embodiment of the present invention.

[0074] In the diagram: 1. Base; 2. Touchscreen; 3. Sensor fusion block; 4. Sand table carrier; 5. Lens housing; 6. Lens; 7. Corrugated elastic plate; 8. Scraper head; 9. Clamp head; 10. Connecting pin; 11. Mounting component; 12. Protective cylinder; 13. Electric telescopic rod; 14. Assembly box; 15. Clamp body; 16. First telescopic plate; 17. Second telescopic plate; 18. Stand; 19. Traction bar; 20. Collar; 21. Hook rod; 22. Annular cylinder; 23. Lock hole; 24. Rubber bladder; 25. Pipe; 26. Scraper one; 27. Scraper two; 28. Piston cylinder; 29. ​​Piston rod; 30. Suction tube; 31. Ultrasonic transmitter; 32. Skin sensor; 33. Elastic drive ring; 34. Piston plate; 35. Connecting bar. Detailed Implementation

[0075] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0076] like Figures 1 to 16 As shown, a multimedia intelligent interactive digital sand table includes a base 1, multiple sensor fusion blocks 3 are installed on the inner wall of the base 1, a lens 6 is provided at one end of the sensor fusion block 3, a lens housing 5 is provided on the outer side of the lens 6, a sand table carrier 4 is fixedly installed on the inner wall of the base 1, and a touch screen 2 is provided on the outer side of the base 1. It also includes:

[0077] An anti-abnormality unit is located on the outside of lens 6 to prevent the projected digital sand table from becoming blurry or flickering;

[0078] The anti-abnormality part includes a wiping component and a recycling component. The wiping component is located on the outside of the lens 6. The wiping component and the anti-static component are connected. The anti-static component is located on the inside of the lens housing 5.

[0079] A fixing part is provided on the outside of the lens 6 and located on the inside of the lens housing 5 to fix the lens;

[0080] The fixing part includes a driving component and a stabilizing component. The driving component is located on the outside of the lens 6 and inside the lens housing 5. The driving component is connected to the stabilizing component, which is located on the outside of the lens 6.

[0081] An auxiliary part is located inside the lens housing 5 to perform dust removal and electrical signal to tactile conversion on the lens 6.

[0082] The auxiliary part includes a docking part and a blowing part. The docking part is located inside the lens housing 5 and is connected to the blowing part. The blowing part is located on one side of the docking part.

[0083] Specifically, the base 1 houses a touch interaction algorithm chip, an intelligent processor, an interaction module, and a control module. The sensor fusion block 3 contains touch sensors, infrared sensors, cameras, photoelectric sensors, environmental monitoring sensors, and temperature sensors to sense changes in the surrounding environment, enabling different interactive functions and data acquisition. It typically requires integration with infrared cameras, LiDAR, and inertial measurement units. The intelligent processor receives the interactive functions and data acquisition from the sensor fusion block 3. The rendering engine transforms the model into a visual scene, and the algorithm analyzes user commands (touch, voice, and actions) and calculates scene changes. The touch interaction algorithm chip recognizes user clicks and swipes through an infrared touch frame and a capacitive touchscreen, and mines and associates user command data through learning algorithms. The lens 6 facilitates the projection of digital content onto the physical sand table base, creating a virtual-real hybrid effect. A through slot is provided on one side of the base 1 for disassembling the sensor fusion block 3 and the lens 6. The lens housing 5 provides protection for the lens 6.

[0084] In practical application, the staff installs the lens 6 at the four corners of the base 1 to form a downward projection trend. After correcting the focus, they click the display sand table command on the touch screen 2, select the digital sand table scene to be projected, and process it through the cooperation of the touch interaction algorithm chip and the intelligent processor. The rendering engine transforms the model into a visual scene and projects the scene data information to be displayed onto the sand table carrier 4 to achieve an immersive physical display effect.

[0085] like Figures 1 to 3 As shown, the wiping component includes:

[0086] A corrugated elastic plate 7 is disposed on the inner wall of the lens housing 5;

[0087] The scraping head 8 is located at one end of the corrugated elastic plate 7;

[0088] The clip 9 is symmetrically fixed on the outside of the scraping head 8.

[0089] Insert pin 10, which is fixed to one end of the card head 9;

[0090] The mounting component 11 is fixedly installed on one side of the corrugated elastic plate 7 and located inside the lens housing 5 so as to install the corrugated elastic plate 7.

[0091] Assembly box 14 is located outside the lens 6 and inside the lens housing 5.

[0092] Specifically, both the corrugated elastic plate 7 and the scraper head 8 are elastic, made of soft microfiber material, and are fitted onto the outside of the lens 6. The size of the corrugated elastic plate 7 and the scraper head 8 is adapted to the lens 6. The clip 9 and the insertion pin 10 are used for positioning in the appropriate position, and the mounting part 11 is used to connect the corrugated elastic plate 7 to the inside of the lens housing 5. In the initial state, the corrugated elastic plate 7 and the scraper head 8 are wrapped around the outside of the lens 6 by default.

[0093] In practical application, when the digital sand table displays virtual images, dust and fingerprints on the outside of the lens 6 interfere with the irregular scattering of the projected light, affecting image clarity and causing problems such as blurry images and light spots, resulting in abnormal projection display. Therefore, before the digital sand table projection process, the electric telescopic rod 13 is first driven to retract. The retraction distance of the electric telescopic rod 13 becomes shorter, and the corrugated elastic plate 7 is pulled back. The corrugated elastic plate 7 gradually retracts together, and the scraping head 8 is pulled to move against the outside of the lens 6. The scraping head 8 wipes the outside of the lens 6 and moves from the lowest point of one end of the lens 6 to the highest point of the largest diameter as it is pulled. The fit becomes tighter and tighter. When it is in contact with the lens 6, the scraping head 8 wipes away the dust on the outside of the lens 6, preventing the dust from blurring the projection of the lens 6 and ensuring the clarity of the image.

[0094] like Figures 12 to 15As shown, the recyclable parts include:

[0095] Scraper 26 is set on the inner wall of scraper head 8;

[0096] Scraper 27 is located on one side of scraper 1 26;

[0097] The scraper 26 has an annular groove inside, which extends through the scraper 27 to collect dust.

[0098] The suction component is located on the inner wall of scraper 27 to suck up residual dust;

[0099] like Figures 12 to 13 As shown, the suction component includes:

[0100] Piston cylinder 28 is symmetrically arranged on the inner wall of scraper 27;

[0101] The suction tube 30 is located below the piston cylinder 28;

[0102] Piston rod 29 is disposed inside piston cylinder 28;

[0103] Piston plate 34 is disposed on the inner wall of piston cylinder 28;

[0104] The connecting bar 35 is located outside the piston rod 29 and above the elastic drive ring 33.

[0105] The scraping head 8, piston cylinder 28, piston rod 29, suction tube 30, elastic drive ring 33, and piston plate 34 are all ring-shaped, and the piston rod 29 and piston plate 34 are fixedly connected.

[0106] Specifically, a sharp end is formed between scraper 1 26 and scraper 2 27, which creates a tendency to scrape off dust when sliding along the outside of lens 6; scraper 1 26 and scraper 2 27 are connected; and scraper head 8 is sleeved on the outside of lens 6.

[0107] In practical application, the scraping head 8 slides along the outside of the lens 6, and dust gradually accumulates on the outside of the lens 6. When the dust is collected, the scraping head 8 moves, which drives the scraper blade 26 and the scraper blade 27 to move together. The sharp parts between the scraper blade 26 and the scraper blade 27 scrape the dust. As the dust accumulates, it reaches the height of the annular groove and enters the scraper blade 26. The dust is collected in the annular groove, thereby preventing dust from remaining on the outside of the lens 6 and further improving the cleanliness.

[0108] After recycling, a very small amount of dust will still remain on the outside of the lens 6. When further cleaning is required, because the lens 6 is spherical, the scraper head 8 will be affected by the internal stress when it comes into contact with the sphere, causing deformation. The scraper head 8 will deform outward at the maximum diameter of the lens 6 and come into contact with the elastic drive ring 33. The elastic drive ring 33 will be squeezed and move along the inside of the scraper 27, and drive the connecting bar 35 to move together. The connecting bar 35 is fixedly connected to the piston rod 29. The piston rod 29 moves upward and is pulled out from inside the piston cylinder 28. The piston rod 29 drives the piston plate 34 to move upward, and a vacuum area is formed between the piston plate 34 and the piston cylinder 28. The upward movement of the piston cylinder 28 has a suction force. The suction force is used to draw a very small amount of dust away from between the scraper 27 and the lens 6 through the suction tube 30 and leave it in the piston cylinder 28. The dust is then periodically removed by disassembling the scraper 27 and the lens 6, thus completing the cleaning of the lens 6.

[0109] like Figures 4 to 6 As shown, the driving component includes:

[0110] The protective cylinder 12 is fixedly installed on top of the assembly box 14;

[0111] The electric telescopic rod 13 is installed on the inner wall of the protective cylinder 12 and located inside the lens housing 5;

[0112] One end of the electric telescopic rod 13 is connected to the corrugated elastic plate 7;

[0113] A motor is installed on one side of the electric telescopic pole 13 and is connected to the motor drive end.

[0114] Specifically, the protective cylinder 12 is used to protect the electric telescopic rod 13 and also facilitates the installation of the electric telescopic rod 13 on top of the assembly box 14.

[0115] In practical application, the electric telescopic rod 13 extends after being energized, driving the corrugated elastic plate 7. When the electric telescopic rod 13 extends or shortens, the corrugated elastic plate 7 moves together. The corrugated elastic plate 7 moves and contracts along the outside of the lens 6, pulling the corrugated elastic plate 7 back. Under the driving action of the motor, the wiping head 8 wipes the outside of the lens 6 synchronously, thereby having the force to drive the wiping head 8.

[0116] like Figures 6 to 10 , Figure 15 As shown, the stabilizer includes:

[0117] The upright frame 18 is located below the assembly box 14;

[0118] The collar 20 is located on the outside of the electric telescopic pole 13;

[0119] The traction bar 19 is located on the inner side of the upright 18 and is connected to the collar 20;

[0120] Hook rod 21, through traction bar 19 is set inside the upright frame 18;

[0121] The clamp body 15 is located on the outside of the sensor fusion block 3 and is connected to the lens housing 5;

[0122] The first telescopic piece 16 is disposed on the inner side of the clamp body 15;

[0123] The second telescopic piece 17 is disposed inside the first telescopic piece 16.

[0124] Specifically, the stand 18 is connected to the traction bar 19 via the hook rod 21, and the electric telescopic rod 13 is connected to the traction bar 19 via the collar 20, that is, the electric telescopic rod 13 can drive the hook rod 21 to move through the collar 20; the clamp body 15 is used to be installed on the inner wall of the lens housing 5 to form a fixed function; the second telescopic piece 17 is set inside the first telescopic piece 16, and the second telescopic piece 17 is telescopically connected to the first telescopic piece 16; one end of the clamp body 15 is connected to the stand 18.

[0125] In practical application, the wiping head 8 exerts friction on the lens 6, and this happens frequently, causing the lens 6 to loosen or shift. To improve stability, when the electric telescopic rod 13 is energized and extends the corrugated elastic plate 7, the electric telescopic rod 13 will move the collar 20 together. When the collar 20 moves, it will move the traction bar 19 and the hook rod 21. The hook rod 21 pulls the stand 18 to pull the second telescopic piece 17 out of the inside of the first telescopic piece 16. After the second telescopic piece 17 is pulled out, it moves closer to the other side of the lens 6, covering the other side of the lens 6 and forming a fixed tendency. At the same time, it forms a barrier to prevent dust from entering the other side, thus having the function of automatically stabilizing the lens 6.

[0126] like Figure 6 As shown, the mating parts include:

[0127] The annular tube 22 is circular in shape and is located inside the lens housing 5.

[0128] Two keyholes 23 are symmetrically arranged on the inner wall of the annular cylinder 22;

[0129] The diameter of the keyhole 23 is matched with the diameter of the insertion pin 10.

[0130] In practical application, after the scraping head 8 moves to the appropriate position, in order to ensure the normal projection of the virtual image by the lens 6, it needs to be retracted to one side of the lens housing 5 so that the projection of the other top of the lens 6 can be achieved. When the scraping head 8 moves, it will drive the clip 9 and the insertion pin 10 to move. The insertion pin 10 gradually moves towards the direction of the annular cylinder 22 until it is inserted into the locking hole 23, thereby forming a docking and positioning function to prevent easy loosening.

[0131] like Figure 6 , Figure 9 , Figure 15 As shown, the blowing component includes:

[0132] The rubber bladder 24 is located inside the assembly box 14 and on one side of the upright 18; the pipe 25 passes through the assembly box 14 and is fixed to one side of the rubber bladder 24.

[0133] An ultrasonic transmitter 31 is located inside the scraper 27.

[0134] The skin sensor 32 is fixed to the top of the ultrasonic transmitter 31.

[0135] Specifically, the gas inside the rubber bladder 24 is sealed, with an air inlet at one end and an air outlet at the other. During use, the air inlet is closed and the air outlet is open. One end of the pipe 25 is connected to the lock hole 23. A limiting groove is provided inside the assembly box 14 to limit the position of the stand 18. The insert pin 10 and the clip 9 are hollow, with one end of the insert pin 10 having an opening, and the clip 9 extending through the scraping head 8 to above the lens 6. The ultrasonic transmitter 31 contains piezoelectric transducers, each of which can independently control the phase vibration and amplitude energy intensity of the emitted sound waves. The transducers convert electrical signals into high-frequency mechanical vibration ultrasonic waves, which are then emitted directionally into space. The skin sensor 32 contains a mechanoreceptor that can capture the vibration of this directional ultrasonic wave transmission, simulating the tactile sensation of "touching a physical object" through minute changes in vibration.

[0136] In practical application, during the wiping process, the charged body attracts tiny objects such as fabric fibers and human hair from the surrounding environment. These particles, including dust, accumulate on the lens 6 due to electrostatic adsorption. If the wiping head 8 breaks or malfunctions after prolonged wiping, it may not be completely clean. Therefore, when the electric telescopic rod 13 pulls the collar 20, traction bar 19, and hook rod 21 together, the stand 18 is simultaneously twisted due to this influence. The bottom of the stand 18 is pulled, while the top swings in the opposite direction. The rubber bladder 24 is squeezed by the limiting groove, and the gas inside the rubber bladder 24 is discharged through the pipe 25 and conducted through the locking hole 23 to the interface of the plug pin 10. It then enters the inner cavity of the plug pin 10 and the clip 9, and finally blows the lens 6 again through the top of the inner cavity to ensure that the very small amount of dust attracted by static electricity on the lens is cleaned and to prevent residual dust from blurring the display of digital sand table images. When regular maintenance is required, the exhaust end of the rubber bladder 24 is closed and the air inlet end is opened during disassembly. Gas is added to the rubber bladder 24 through the air pump for the next use.

[0137] To enhance the realism of the digital sand table and create a tactile experience when touching the virtual image, an ultrasonic transmitter 31 emits ultrasonic waves onto the digital sand table. These waves are then converted into high-frequency mechanical vibrations by a piezoelectric transducer. When touched, the vibrations are sensed by the mechanoreceptors in the skin sensor 32, and the signals are transmitted to the brain via nerves. This tricks the brain into believing it is a real physical scene, creating the effect of a model touching a real scene. This process converts pressure signals into tactile sensations, simulating a realistic physical experience and enhancing the display effect of the digital sand table.

[0138] Working principle: The device uses a base 1 as a carrier, with a touch screen 2 on the top for user command input interface, a sand table carrier 4 fixed on the inner wall for receiving the projection display surface, and lenses 6 installed in the four corners for projection. Lens housings 5 ​​are installed on the outside of the lenses 6 for protection. Multiple sensor fusion blocks 3 are installed on the inner wall of the base 1, which integrate touch sensors, infrared sensors, cameras, photoelectric sensors, temperature sensors, etc., mainly for environmental perception and interactive command capture.

[0139] A through slot is provided on one side of the base 1 to facilitate the disassembly of components such as the sensor fusion block 3 and the lens 6, enabling subsequent maintenance.

[0140] The base unit 1 houses a touch interaction algorithm chip, a smart processor, an interaction module, and a control module.

[0141] Sensor fusion block 3 collects environmental data (such as light and temperature) and user actions (such as touch and gestures) through various sensors and transmits them to the intelligent processor;

[0142] The intelligent processor, combined with the touch interaction algorithm chip, parses instructions, such as selecting a projection scene, and uses the rendering engine to transform the digital model into a visual scene.

[0143] The control module drives the lens 6 to project the scene onto the sand table carrier 4, forming a display effect that combines virtual and real elements; the user can adjust the projected content in real time by touching the screen 2 or by the actions captured by the sensor, thus realizing an interactive closed loop.

[0144] To resolve the blurry and flickering projection issues caused by dust and fingerprints on Lens 6, the specific workflow is as follows:

[0145] The wiping components include a corrugated elastic plate 7, a wiping head 8, a clip 9, a connector 10, and a mounting component 11 (all made of soft microfiber material to fit the shape of the lens 6), which initially wrap around the outside of the lens 6.

[0146] Drive logic: An electric telescopic rod 13 (the core of the drive component) is installed inside the protective tube 12 on the inner side of the lens housing 5. One end of the rod is connected to the corrugated elastic plate 7 and to the motor drive end. When the lens needs to be cleaned, the motor drives the electric telescopic rod 13 to retract, pulling the corrugated elastic plate 7 back. During the retraction of the corrugated elastic plate 7, the scraping head 8 slides against the outer side of the lens 6, moving from the lowest point of one end of the lens 6 to the point of maximum diameter (the fit gradually tightens as it slides). The scraping head 8, made of soft microfiber material, removes surface dust and fingerprints.

[0147] The recycling components include scraper 1 (26), scraper 2 (27), and suction parts (including piston cylinder 28, piston rod 29, suction pipe 30, etc.) to prevent dust residue after wiping.

[0148] When the scraping head 8 slides, it drives scraper 1 26 and scraper 27 to move synchronously; a sharp end is formed between the two, which scrapes the dust on the surface of the lens 6 and guides it into the annular groove of scraper 1 26 (the annular groove extends to scraper 27), thus achieving initial dust collection.

[0149] Lens 6 is spherical. When the scraper head 8 slides to its maximum diameter, it deforms due to internal stress, squeezing the elastic drive ring 33 inside the scraper 27. The elastic drive ring 33 drives the connecting bar 35 and piston rod 29 to move. The piston rod 29 is pulled out of the piston cylinder 28, creating a vacuum zone between the piston plate 34 and the piston cylinder 28. A very small amount of residual dust on the surface of lens 6 is drawn into the piston cylinder 28 through the suction tube 30. The collected dust can be cleaned by periodically disassembling the scraper 27. The residual dust is collected and sucked up deeply.

[0150] During the wiping process, prevent lens 6 from becoming loose due to friction, and simultaneously form a dustproof barrier:

[0151] The driving component is centered on the electric telescopic rod 13 (which shares the driving source with the wiping component). A collar 20 is provided on its outer side, which is connected to the hook rod 21 on the inner side of the upright frame 18 through the traction bar 19. When the electric telescopic rod 13 extends or retracts, it synchronously drives the collar 20, the traction bar 19 and the hook rod 21 to move, providing power for the stabilizing component.

[0152] The stabilizing components serve to secure the parts and prevent dust accumulation.

[0153] The stabilizing components include the upright frame 18, the clamp body 15, the first telescopic plate 16, the second telescopic plate 17, etc.

[0154] When the electric telescopic rod 13 extends and drives the corrugated elastic plate 7, the collar 20 pulls the hook rod 21 through the traction bar 19, so that the stand 18 pulls the second telescopic piece 17 out of the first telescopic piece 16. After being pulled out, the second telescopic piece 17 moves closer to the other side of the lens 6 and cooperates with the original fixing structure to lock the lens 6 and prevent it from loosening.

[0155] After the second telescopic piece 17 is attached to the lens 6, it forms a physical barrier to prevent external dust from entering from the side of the lens 6, thus further ensuring the clarity of the projection.

[0156] Enhanced lens cleaning and tactile interaction experience: Connecting component: Positioning wiping component to avoid interfering with projection.

[0157] The docking part is an annular cylinder 22 (inside the lens housing 5), with symmetrical locking holes 23 on its inner wall (the hole diameter is adapted to the insertion pin 10); after the wiping head 8 finishes wiping, the electric telescopic rod 13 drives it to move towards the annular cylinder 22, which drives the locking head 9 and the insertion pin 10 to move synchronously until the insertion pin 10 is inserted into the locking hole 23. At this time, the wiping part is fixed on one side of the lens housing 5 to avoid blocking the top of the lens 6 and ensure that the projection is normal.

[0158] Blowing component: Eliminates static electricity and attracts dust, achieving tactile simulation;

[0159] The blowing component includes a rubber bladder 24, a pipe 25, an ultrasonic transmitter 31, and a skin sensor 32.

[0160] When the stand 18 moves, its top squeezes the rubber bladder 24 (inside the assembly box 14) through the limiting groove. The gas inside the rubber bladder 24 is conducted through the pipe 25 and the lock hole 23 to the cavity between the plug pin 10 and the clip 9, and finally sprays out from the air outlet at the top of the cavity to blow away the residual fabric fibers, hair and other fine dust adsorbed by static electricity on the surface of the lens 6. The rubber bladder 24 can be replenished with air periodically by the air pump (close the exhaust end and open the air inlet end).

[0161] An ultrasonic transmitter 31 (including a piezoelectric transducer) is provided on the inner side of scraper 27, which can independently control the phase and amplitude of the ultrasonic waves. When the user touches the virtual image, the ultrasonic transmitter 31 emits directional ultrasonic waves, and the skin sensor 32 (including a mechanoreceptor) captures the vibration signal and transmits it to the nerves. The brain interprets the vibration as the tactile sensation of "touching a physical object", thereby enhancing the realism of virtual interaction.

[0162] The staff installed lens 6 at the four corners of base 1 (forming a projection angle from top to bottom), and after adjusting the focus, they input the "display sand table command" through touch screen 2 to select the projection scene.

[0163] The intelligent processor drives the electric telescopic rod 13 to clean the surface of the lens 6 through the wiping and recycling components, while the fixing part fixes the lens to prevent it from loosening.

[0164] The rendering engine transforms the digital model into a visual scene, and the lens 6 projects the scene onto the sand table carrier 4; the sensor fusion block 3 captures user actions (such as touch and gestures), and adjusts the projected content in real time after being analyzed by the algorithm.

[0165] The blowing component uses airflow to clean the dust a second time, ensuring the clarity of the projection; the ultrasonic transmitter 31 and the skin sensor 32 work together to simulate the touch sensation and enhance the interactive immersion.

[0166] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multimedia intelligent interactive digital sand table, comprising a base (1), wherein a plurality of sensor fusion blocks (3) are installed on the inner wall of the base (1), a lens (6) is provided at one end of the sensor fusion block (3), a lens housing (5) is provided on the outer side of the lens (6), a sand table carrier (4) is fixedly installed on the inner wall of the base (1), and a touch screen (2) is provided on the outer side of the base (1), characterized in that, Also includes: An anti-abnormality section is set on the outside of the lens (6) to prevent the projected digital sand table from becoming blurry or flickering; The anti-abnormality part includes a wiping component and a recycling component. The wiping component is located on the outside of the lens (6). The wiping component and the anti-static component are connected. The anti-static component is located on the inside of the lens housing (5). The fixing part is located on the outside of the lens (6) and inside the lens housing (5) to fix the lens; The fixing part includes a driving component and a stabilizing component. The driving component is disposed on the outside of the lens (6) and located on the inside of the lens housing (5). The driving component is connected to the stabilizing component, which is disposed on the outside of the lens (6). An auxiliary part is provided inside the lens housing (5) to blow dust off the lens (6) and convert electrical signals into tactile feedback. The auxiliary part includes a docking part and a blowing part. The docking part is disposed inside the lens housing (5) and is connected to the blowing part. The blowing part is disposed on one side of the docking part. The wiping device includes: A corrugated elastic plate (7) is installed on the inner wall of the lens housing (5); A scraping head (8) is provided at one end of the corrugated elastic plate (7); The clip (9) is symmetrically fixed on the outside of the scraping head (8); The wiping device also includes: The insertion pin (10) is fixed to one end of the clip (9); The mounting component (11) is fixedly installed on one side of the corrugated elastic plate (7) and located inside the lens housing (5); Assembly box (14) is located outside the lens (6) and inside the lens housing (5); The recycled components include: Scraper 1 (26) is set on the inner wall of scraper head (8); Scraper 2 (27) is located on one side of scraper 1 (26); The scraper one (26) has an annular groove inside, and the annular groove extends through the scraper two (27) to collect dust; The suction component is located on the inner wall of scraper two (27) to suck up residual dust.

2. The multimedia intelligent interactive digital sand table according to claim 1, characterized in that: The suction component includes: Piston cylinder (28) is symmetrically arranged on the inner wall of scraper two (27); The suction tube (30) is located below the piston cylinder (28); The piston rod (29) is located inside the piston cylinder (28); Piston plate (34) is disposed on the inner wall of piston cylinder (28); The connecting bar (35) is located outside the piston rod (29) and above the elastic drive ring (33); The piston cylinder (28), piston rod (29), suction tube (30), elastic drive ring (33), and piston plate (34) are all annular in shape.

3. The multimedia intelligent interactive digital sand table according to claim 1, characterized in that: The driving component includes: The protective sleeve (12) is fixedly installed on top of the assembly box (14); An electric telescopic rod (13) is installed on the inner wall of the protective cylinder (12) and located inside the lens housing (5); One end of the electric telescopic rod (13) is connected to the corrugated elastic plate (7); A motor is provided on one side of the electric telescopic rod (13) and is connected to the motor drive end.

4. The multimedia intelligent interactive digital sand table according to claim 3, characterized in that: The stabilizer includes: The upright frame (18) is located below the assembly box (14); A collar (20) is set on the outside of the electric telescopic pole (13); The traction bar (19) is located on the inside of the upright (18) and is connected to the collar (20).

5. A multimedia intelligent interactive digital sand table according to claim 4, characterized in that: The stabilizer also includes: The hook rod (21) and the traction bar (19) are set inside the upright (18); The clamp body (15) is set on the outside of the sensor fusion block (3) and connected to the lens housing (5); The first telescopic piece (16) is set on the inner side of the clamp body (15); The second telescopic piece (17) is disposed inside the first telescopic piece (16).

6. The multimedia intelligent interactive digital sand table according to claim 1, characterized in that: The docking component includes: The annular tube (22) is circular in shape and is located inside the lens housing (5). Two keyholes (23) are symmetrically arranged on the inner wall of the annular cylinder (22); The diameter of the lock hole (23) is adapted to the diameter of the pin (10).

7. The multimedia intelligent interactive digital sand table according to claim 1, characterized in that: The blowing component includes: A rubber bladder (24) is located inside the assembly box (14) and on one side of the stand (18); a pipe (25) is installed through the assembly box (14) and fixed to one side of the rubber bladder (24); An ultrasonic transmitter (31) is located inside the scraper (27); The skin sensor (32) is fixed to the top of the ultrasonic transmitter (31).

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