A multi-modal interactive intelligent lifting learning desk and system for preventing myopia

Abstract

This invention relates to the field of study desk technology, specifically to a multimodal interactive intelligent height-adjustable study desk and system for preventing myopia. The desk includes a desktop with a bookcase fixedly mounted on it. A full-spectrum eye-protecting light fixture is positioned above the desktop, and a lifting mechanism is installed at the bottom of the desktop. A local control unit is installed on the inner wall of the bookcase in the upper right corner of the desktop. This invention achieves automatic and constant illuminance by using a full-spectrum eye-protecting light fixture containing red light, combined with an illuminance sensor and an optical drive module. This avoids sudden changes in strong light that could irritate the eyes, alleviating eye strain and reducing the risk of myopia in teenagers from the perspective of light source. Furthermore, through an AI posture recognition module combined with the computing chip of the local control unit, it achieves real-time local recognition of three types of poor sitting postures: hunchback, head tilt, and slouching. Upon recognizing a poor posture, it provides corrective reminders through voice prompts, screen prompts, and flashing of the light fixture, allowing for timely intervention in poor posture among teenagers.

Description

Technical Field

[0001] This invention relates to the field of study desk technology, and more specifically, to a multimodal interactive intelligent height-adjustable study desk and system for preventing myopia. Background Technology

[0002] With the increasing myopia rate among teenagers, vision health protection in learning settings has become a widespread social concern. Existing study desks, as core learning tools, have evolved from ordinary fixed-height desks to manually adjustable desks, and then to smart desks integrating basic lighting and simple posture reminders. However, in practical applications, many key technological deficiencies remain, making it difficult to meet the core needs of protecting teenagers' vision health. Adjustable study desks are core learning furniture adapted to the growth needs of teenagers, flexibly adjusting the desktop height according to the user's height to meet the needs of different postures, such as sitting and standing comfortably, conforming to ergonomic design principles. With the popularization of healthy learning concepts, adjustable study desks, which balance adaptability and practicality, have become common in homes and schools. The industry continues to optimize based on the growth and development characteristics of teenagers, striving to create a comfortable and suitable daily learning environment for them.

[0003] Patent CN217337757U discloses a study desk comprising a table body and two legs located on the left and right sides of the table body. The table body eliminates the traditional I-beam frame structure, replacing it with existing decorative accessories used in traditional study desks to bear weight, thus optimizing the structure while maintaining stability and fulfilling the decorative requirements of traditional study desks. Compared to conventional study desks, this desk not only optimizes the structural design but also reduces its weight, saving on production and transportation costs. However, this desk only provides basic mechanical functions such as height adjustment and table support, lacking features like eye-protection lighting and posture recognition correction. It fails to meet the vision protection and posture correction needs of teenagers in their learning environments and does not address the problems of poor eye protection and low posture recognition accuracy found in existing similar study desks. Therefore, we propose a multimodal interactive intelligent height-adjustable study desk and system for preventing myopia. Summary of the Invention

[0004] The purpose of this invention is to provide a multimodal interactive intelligent height-adjustable learning desk and system for preventing myopia, so as to solve the problems mentioned in the background art.

[0005] To address the aforementioned technical problems, one objective of this invention is to provide a multimodal interactive intelligent height-adjustable study desk for preventing myopia. The desk includes a desktop, a bookcase fixedly installed at the rear of the top of the desktop, a full-spectrum eye-protecting lighting fixture positioned above the desktop, and a lifting mechanism installed at the bottom of the desktop. The lifting mechanism includes a fixed frame fixed to the bottom of the desktop and two sets of lifting components fixed to the left and right sides of the bottom of the fixed frame. Each lifting component includes an outer support leg and an inner support leg, with the inner support legs correspondingly fitted inside the outer support legs and slidably connected to them. Each lifting component is equipped with a lifting motor for controlling the lifting of the inner support legs within that component. A local control unit is installed on the inner wall of the bookcase in the upper right corner of the desktop.

[0006] Preferably, the full-spectrum eye-protection lighting fixture is parallel to the desktop, with the bottom surface of the full-spectrum eye-protection lighting fixture facing the top surface of the desktop, and a pair of fixing brackets are fixed at the rear edge of the full-spectrum eye-protection lighting fixture, with the two fixing brackets respectively fixedly connected to the left and right rear ends of the bookcase. In this setup, the mounting bracket provides stable support for the full-spectrum eye-protection lighting fixtures, ensuring a reasonable distance between the lighting fixtures and the desktop, and guaranteeing that the lighting range effectively covers the desktop.

[0007] Preferably, the full-spectrum eye-protection lighting fixture is an integrated aluminum alloy dual-lamp structure. The bottom of the full-spectrum eye-protection lighting fixture is provided with a lower lamp group for illuminating the desktop, and the top of the full-spectrum eye-protection lighting fixture is provided with an upper lamp group for illuminating the external environment. An illuminance sensor is externally connected to the full-spectrum eye-protection lighting fixture. In this setup, the dual-lamp structure can separately meet the needs of desktop illumination and ambient lighting, and the illuminance sensor can collect light data in real time, providing data support for lighting adjustment.

[0008] Preferably, the two sets of lifting components have a total of four outer support legs and four inner support legs. The four inner support legs are respectively fixed at the four corners of the bottom of the fixed frame. The lifting motor is located between the tops of the two inner support legs on the same set of lifting components. The lifting motor is coaxially connected to a synchronizing rod. The cross-section of the synchronizing rod shaft is hexagonal. The shaft shaft of the synchronizing rod passes through the output end of the lifting motor. The first and last ends of the synchronizing rod extend into the corresponding two inner support legs. A lead screw is coaxially rotatably connected inside the inner support leg. The top of the lead screw is connected to the end of the shaft of the synchronizing rod using a steering gear. When the lifting motor is working, the lifting motor drives the synchronizing rod to rotate, so that the two lead screws located at both ends of the synchronizing rod rotate synchronously. Preferably, an inner sleeve rod is coaxially fixed inside the outer support leg, and a lead screw is coaxially sleeved inside the inner sleeve rod and threadedly connected to the inner sleeve rod. A motor controller is installed on the inner side of the fixed frame, and the motor controller is equipped with a lifting control module. The motor controller is used to synchronously control the operation of two lifting motors. In these two settings, the hexagonal synchronizing rod works with the steering gear to achieve synchronous rotation of the lead screw, ensuring the synchronicity of the lifting and lowering of the support legs within the same group. The threaded engagement between the lead screw and the inner sleeve rod converts the rotational motion into linear lifting and lowering motion. The motor controller enables coordinated control of the two lifting motors, ensuring synchronous lifting and lowering of all four legs and making the desktop lifting and lowering more stable.

[0009] Preferably, a base plate is fixed between the bottom ends of the two adjacent outer support legs, and rubber feet are installed at the bottom end faces of both the front and rear ends of the base plate. In this design, the base plate enhances the connection stability of the outer support legs, and the rubber feet increase the friction with the ground while mitigating vibrations caused by the desk's height adjustment.

[0010] Preferably, the local control unit includes a control motherboard, which is equipped with a computing chip, a driver chip, and a power management module. The driver chip includes an AI processing module, an optical driving module, a voice processing module, and a sensing processing module. The modules are bidirectionally electrically connected to each other through the motherboard bus. The control motherboard is equipped with a communication module. In this setup, each module transmits data bidirectionally via the motherboard bus, ensuring centralized control of each functional module by the local control unit and improving control response efficiency. The Wi-Fi chip in the communication module can establish a wireless connection with the cloud service module to achieve data synchronization, push teaching resources, and online firmware upgrades. The Bluetooth chip supports local linkage in offline mode, balancing functional expandability and usage flexibility.

[0011] Preferably, the control motherboard also integrates an AI posture recognition module, which includes a camera and an image acquisition module. The camera passes through the front end of the housing of the local control unit and faces the user, so that the camera's acquisition range covers the upper body area between the user's shoulders and neck and waist. In this setting, the camera's capture range is precisely matched to the user's upper body, effectively capturing the sitting posture and providing clear image data for subsequent posture recognition.

[0012] Preferably, the control motherboard also integrates a multimodal interaction module, which includes a voice unit, a touch screen and a display chip. The voice unit includes a microphone, a speaker, an offline voice chip and an online voice module. In this setting, the multimodal interaction module integrates multiple interaction methods to meet the user's operational needs in different scenarios and improve the ease of use of the desk. The second objective of this invention is to provide a multimodal interactive system for preventing myopia, based on the aforementioned multimodal interactive intelligent height-adjustable learning desk for preventing myopia, comprising the following steps: I. Seating Sensing and Function Activation: Based on AI algorithms, the AI ​​posture recognition module detects the user's sitting / leaving status. If a user is detected sitting, the local control unit sends working instructions to the full-spectrum eye-protection lighting fixture, the AI ​​posture recognition module, and the multimodal interaction module. The full-spectrum eye-protection lighting fixture performs a slow-on action and defaults to the learning mode. The illuminance sensor detects the ambient light intensity in real time and adjusts it to a constant illuminance of 700LX through the optical drive module. If a user is detected leaving, the full-spectrum eye-protection lighting fixture is slowly turned off after a preset delay, and all functional modules return to standby mode. 2. Local real-time sitting posture recognition: The AI ​​sitting posture recognition module continuously collects images of the user's upper body sitting posture from the shoulders and neck to the waist through the camera, and transmits the image data to the local control unit. The AI ​​processing module relies on the local computing power of the computing chip to run anchor-frame neural network AI sitting posture detection models such as YOLOv2-v5, Faster R-CNN, and SSD to identify in real time whether the user has three types of bad sitting postures: hunchback, head tilt, and slouching. All image data is processed only in the local control unit and is not transmitted to the outside. 3. Poor Posture Reminder: If the AI ​​processing module detects poor posture, it immediately triggers the multimodal interaction module to issue a voice correction reminder through the speaker, and at the same time displays the posture correction prompt information on the touch screen; if the user continues to maintain poor posture for more than the preset threshold, the local control unit will link the full-spectrum eye-protection lighting fixture to flash slightly to enhance the reminder effect. IV. Intelligent Eye-Friendly Lighting Adjustment: The full-spectrum eye-friendly lighting fixtures collect real-time illumination data of the desktop and surrounding environment through illuminance sensors and feed it back to the local control unit. The optical drive module automatically adjusts the brightness of the upper and lower light groups based on the illumination data to maintain a constant illuminance of 700LX. Users can also manually control the independent switching, brightness adjustment, and switching between learning mode and normal lighting mode of the upper and lower light groups through the voice unit or touch screen of the multimodal interaction module. In normal lighting mode, the brightness of the upper and lower light groups is automatically reduced. Both the upper and lower light groups are controlled by independent drive chips to achieve precise adjustment. V. Intelligent Lifting and Adjustment: Users can send desktop lifting commands via hand control panel, voice unit, or touch screen. After the command is transmitted to the motor controller, its internal lifting control module controls two lifting motors to work together, driving the synchronous rod and lead screw to achieve synchronous lifting of all four legs. The lifting adjustment range is 590mm-940mm. During the lifting process, an absolute encoder-type height sensor collects desktop height data in real time to ensure lifting accuracy. A gyroscope sensor detects the desktop tilt status, and an obstacle detection and rebound component detects lifting resistance. If any module detects an abnormality, it immediately triggers the lifting motor to stop working. At the same time, based on the user's entered height data, the local control unit can automatically calculate and adapt the optimal learning height using the formula (height × 0.55) ± 20mm. VI. Local Data Storage and Cloud Interaction: The local control unit stores information such as posture recognition data, lighting adjustment parameters, height adjustment data, and usage time locally, and the power management module implements a power-off memory function; the local control unit establishes wireless communication with the remote cloud service module through the Wi-Fi chip of the communication module to realize the uploading and synchronization of the above data; the cloud service module pushes teaching resources, stories, music, and other content from elementary to junior high school to the desk, and realizes audio and video display through speakers and touch screen; at the same time, the cloud service module can push device firmware upgrade packages to complete the online iteration of the system; VII. Offline Multimodal Linkage Control: When there is no network connection, the communication module automatically switches to Bluetooth mode, supporting local linkage between the desk and the user's Bluetooth device. Commands are transmitted to the motor controller via Bluetooth to achieve simple control of the desktop height adjustment. At the same time, the offline voice chip of the multimodal interaction module remains active. The local control unit acts as the offline master controller, directly controlling the on / off, brightness adjustment, and lighting mode switching of the full-spectrum eye-protection lighting fixtures through the lighting control serial port. After receiving and parsing the offline voice commands, the offline voice chip of the multimodal interaction module triggers the local control unit to execute the above lighting control and desktop height adjustment operations, eliminating the limitations of network scenarios. Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention uses a full-spectrum eye-protecting lighting fixture containing a 660nm red light band, combined with an illuminance sensor and optical drive module to achieve an automatic constant illuminance of 700LX. Furthermore, it utilizes a seating sensor to achieve gradual on / off of the lighting, avoiding sudden changes in light that could irritate the eyes. Simultaneously, it employs an independent drive design for the upper and lower light groups, supporting intelligent switching between study and daily lighting modes. This precisely adapts to the lighting needs of teenagers in different study scenarios, solving the problems of incomplete lighting spectrum and inconsistent illuminance in existing technologies. This effectively alleviates eye strain and reduces the risk of myopia in teenagers from the perspective of light source. 2. This invention uses an AI posture recognition module combined with the computing chip of a local control unit to achieve real-time local recognition of three types of poor sitting postures: hunchback, head tilt, and slouching. All image data is processed locally and not transmitted to the outside. After recognizing poor sitting posture, it provides corrective reminders through a combination of voice prompts, screen prompts, and flashing lights. This allows for timely intervention in poor sitting postures among teenagers, filling the gap in the comparison document that lacks posture detection and correction functions, and effectively standardizing the sitting posture of teenagers during study. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the lifting mechanism in this invention; Figure 4 This is a perspective view of the lifting assembly in this invention; Figure 5 This is a schematic diagram of the structure of the local control unit in this invention; Figure 6 This is a structural block diagram of the local control unit in this invention; Figure 7 This is a block diagram of the speech unit structure in this invention; The meanings of the labels in the diagram are as follows: 100. Desktop; 110. Bookshelf; 120. Full-spectrum eye-protection lighting fixture; 121. Mounting bracket; 122. Lower light assembly; 123. Upper light assembly; 130. Flip panel; 140. Illuminance sensor; 200. Lifting mechanism; 210. Fixed frame; 211. Motor controller; 220. Lifting assembly; 221. Outer support leg; 2211. Inner sleeve rod; 2212. Base plate; 2213. Foot; 222. Inner support leg; 2221. Lead screw; 223. Lifting motor; 2231. Synchronizing rod; 240. Hand control panel; 300. Local control unit; 310. Control motherboard; 311. Computing chip; 312. Driver chip; 3121. AI processing module; 3122. Optical drive module; 3123. Voice processing module; 3124. Sensing processing module; 313. Power management module; 320. AI posture recognition module; 321. Camera; 322. Image acquisition module; 330. Multimodal interaction module; 331. Voice unit; 3311. Microphone; 3312. Speaker; 3313. Offline voice chip; 3314. Online voice module; 332. Touch screen; 333. Display chip; 340. Communication module; 341. Wi-Fi chip; 342. Bluetooth chip. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. like Figures 1-7 As shown, this invention provides a multimodal interactive intelligent height-adjustable study desk for preventing myopia, including a desktop 100. A bookcase 110 is fixedly installed at the rear of the top of the desktop 100. The bookcase 110 provides storage space for study supplies. The pegboard on the rear side wall can flexibly hang various small items, improving the space utilization efficiency of the desk. A foldable flip panel 130 is hinged to the right side of the top surface of the desktop 100. The flip panel 130 can be tilted forward from 0-30°. The adjustable tilt structure of the flip panel 130 can adapt to the different writing and reading needs of users, making the user's viewing distance and angle more in line with ergonomic requirements. The local control unit 300 is installed on the inner wall of the bookcase 110 in the upper right corner of the desktop 100. This installation position allows the local control unit 300 to avoid the learning and operation area of ​​the desktop 100. The full-spectrum eye-protection lighting fixture 120 is set above the desktop 100. This position allows the lighting range of the full-spectrum eye-protection lighting fixture 120 to fully cover the learning area of ​​the desktop 100, avoiding blind spots. The lifting mechanism 200 is installed at the bottom of the desktop 100. The lifting mechanism 200 provides stable support for the desktop 100 and can flexibly adjust the height of the desktop 100 to accommodate users of different heights.

[0015] like Figure 1 and Figure 2As shown, in this invention, the full-spectrum eye-protection lighting fixture 120 is parallel to the desktop 100, with its bottom surface facing the top surface of the desktop 100. A pair of fixing brackets 121 are fixed at the rear edge. The two fixing brackets 121 are fixedly connected to the left and right rear ends of the bookcase 110, respectively. The fixing brackets 121 provide a stable installation support for the full-spectrum eye-protection lighting fixture 120, so that the lighting fixture always remains parallel to the desktop 100, ensuring the uniformity of the desktop illumination. The full-spectrum eye-protection lighting fixture 120 features an integrated aluminum alloy dual-lamp structure. The aluminum alloy material enhances the structural strength of the fixture while providing excellent heat dissipation. The dual-lamp structure allows for separate lighting control in different areas. A lower lamp assembly 122 illuminates the desktop 100, while an upper lamp assembly 123 illuminates the external environment. The upper lamp assembly 123 provides supplemental ambient lighting, preventing excessive brightness differences between the desktop 100 and its surroundings that could cause eye strain. The lower lamp assembly 122 precisely illuminates the study area, ensuring sufficient lighting on the desktop. An external illuminance sensor 140 is connected, which collects ambient light data in real time, providing data for the automatic brightness adjustment of the full-spectrum eye-protection lighting fixture 120. The 120 full-spectrum eye-protection lighting fixture uses a full-spectrum LED light source containing a 660nm red light band, with a color rendering index (Ra) ≥ 98 and a color temperature of 3700K-4200K (default 4000K). The full-spectrum LED light source's spectrum is close to natural light, and the 660nm red light band fills in the missing parts of the spectrum. The suitable color temperature and high color rendering index make the user's visual experience more comfortable and reduce eye fatigue. Internally, it features a flicker suppression circuit using a constant voltage and constant current scheme, effectively reducing the flicker frequency of the fixture and avoiding continuous eye stimulation caused by flicker. It also includes a driver chip for independently controlling the upper and lower lamp groups. The driver chip allows the upper lamp group 123 and the lower lamp group 122 to be switched on and off and have their brightness adjusted separately, improving the flexibility of lighting adjustment. It supports voice control of the switch, brightness adjustment, automatic constant illuminance, and slow on / off action. The slow on / off action avoids sudden stimulation to the eyes caused by sudden brightening and dimming of the light. Automatic constant illuminance keeps the light intensity of the desktop 100 within a suitable range. Voice control improves the convenience of lamp operation. The illuminance sensor 140 is installed on the control motherboard 310 and electrically connected to the optical driver module 3122. This connection method allows the data collected by the illuminance sensor 140 to be quickly transmitted to the optical driver module 3122, realizing real-time adjustment of lighting brightness.

[0016] like Figures 1-4As shown, specifically, the lifting mechanism 200 includes a fixed frame 210 and two sets of lifting components 220. The fixed frame 210 is fixed to the bottom surface of the desktop 100. The fixed frame 210 provides connection support for the lifting components 220 and the desktop 100, improving the overall structural stability of the lifting mechanism 200. The two sets of lifting components 220 are fixed on the left and right sides of the bottom of the fixed frame 210 respectively. The symmetrically arranged lifting components 220 make the force on the desktop 100 more even, avoiding excessive local force that could cause structural damage. The lifting assembly 220 includes a pair of outer support legs 221 and a pair of inner support legs 222. The inner support legs 222 are correspondingly sleeved on the inner side of the outer support legs 221 and are slidably connected to the outer support legs 221. The sleeved sliding connection structure makes the lifting movement of the inner support legs 222 more stable, while improving the structural compactness of the support legs. The two sets of lifting assemblies 220 have a total of four outer support legs 221 and four inner support legs 222. The four inner support legs 222 are respectively fixed at the four corners of the bottom of the fixed frame 210. The layout of the four sets of support legs makes the support points of the desktop 100 more reasonably distributed, further improving the overall placement stability of the desk. A base plate 2212 is fixed between the bottom ends of two adjacent outer support legs 221. The base plate 2212 connects the adjacent outer support legs 221 into a whole, reducing the swaying of the outer support legs 221 and improving the support stability. Rubber feet 2213 are installed at the bottom end faces of both the front and rear ends of the base plate 2212. The rubber feet 2213 can increase the friction with the ground, prevent the desk from sliding, and also alleviate the slight vibration generated during the lifting process. An inner sleeve rod 2211 is coaxially fixed inside the outer support leg 221. The inner sleeve rod 2211 provides guidance for the rotation and lifting of the lead screw 2221, ensuring the movement accuracy of the lead screw 2221.

[0017] like Figure 4As shown, each lifting assembly 220 is further equipped with a lifting motor 223. The lifting motor 223 is located between the tops of the two inner support legs 222 on the same lifting assembly 220. This installation position allows the power of the lifting motor 223 to be evenly transmitted to the two inner support legs 222, ensuring the synchronicity of the lifting on both sides. A synchronizing rod 2231 is coaxially connected. The cross-section of the synchronizing rod 2231 is hexagonal. The hexagonal rod structure can effectively transmit torque and avoid slippage between the synchronizing rod 2231 and the connecting parts, ensuring the stability of power transmission. The rod shaft passes through the output end of the lifting motor 223, and its first and last ends extend into the corresponding two inner support legs 222. The inner support leg 222 is coaxially rotatably connected to a lead screw 2221. The lead screw 2221 is coaxially sleeved inside the inner sleeve rod 2211 and threadedly connected to the inner sleeve rod 2211. The threaded engagement between the lead screw 2221 and the inner sleeve rod 2211 converts the rotational motion into linear lifting motion, thereby achieving height adjustment of the inner support leg 222. The top is connected to the end of the shaft of the synchronous rod 2231 by a steering device. The steering device changes the direction of power transmission, allowing the horizontal rotational power of the synchronous rod 2231 to be transmitted to the vertical rotational motion of the lead screw 2221. When the lifting motor 223 is working, it drives the synchronous rod 2231 to rotate, causing the two lead screws 2221 at both ends of the synchronous rod 2231 to rotate synchronously. The synchronous rotation of the lead screws 2221 ensures that the two inner support legs 222 in the same group are raised and lowered synchronously, preventing the tabletop 100 from tilting. A motor controller 211 is installed on the inner side of the fixed frame 210. The motor controller 211 provides control commands for the operation of the lifting motor 223, realizing precise control of the lifting action. A hand control panel 240 is installed at the front end of the desktop 100. The hand control panel 240 is electrically connected to the motor controller 211 and is used to manually control the lifting operation of the lifting motor 223. The hand control panel 240 is located at the front end of the desktop 100, which is convenient for users to operate manually and realize quick adjustment of the height of the desktop 100.

[0018] In addition, the motor controller 211 includes a lifting control module and a gyroscope sensor. The lifting control module synchronously controls the operation of the two lifting motors 223, ensuring that the two motors maintain a consistent operating state and achieve synchronized lifting of all four legs, thus guaranteeing the levelness of the desktop 100. The lifting drive circuit is independently controlled by an MCU, paired with a 0.1mm absolute encoder as a height sensor, allowing the lifting mechanism 200 to have a lifting adjustment range of 590mm-940mm. Independent MCU control improves the accuracy of lifting control, and the high-precision absolute encoder accurately collects the height data of the desktop 100. The wide lifting adjustment range of 590mm-940mm accommodates users of different heights aged 6-18. The gyroscope sensor is electrically connected to the lifting control module and detects the tilt state of the desktop 100, sending a signal to the lifting control module to trigger the lifting motors 223 to stop operating. The gyroscope sensor monitors the levelness of the desktop 100 in real time, stopping the lifting motors 223 promptly when tilting occurs to prevent further tilting and potential safety issues. The lifting motor 223 has a rated load of 150kg and a lifting speed of 20mm / s. The rated load of 150kg can meet the weight requirements of placing various school supplies on the desktop 100. The lifting speed of 20mm / s ensures adjustment efficiency while avoiding desktop shaking caused by excessive lifting speed. It also integrates an obstacle detection and rebound component, which is electrically connected to the lifting control module to realize automatic rebound and reset when the desktop 100 encounters resistance during lifting. The obstacle detection and rebound component can detect the resistance change during the lifting process and control the lifting motor 223 to rebound in time when encountering foreign objects to prevent hardware damage and personal injury.

[0019] like Figure 1 , Figure 2 and Figures 5-7As shown, it is worth noting that the local control unit 300 includes a control motherboard 310, which is equipped with a computing chip 311, a driver chip 312, a power management module 313, and a communication module 340. The control motherboard 310 provides an installation carrier and circuit connection basis for each chip and module, enabling the collaborative work of each component. The driver chip 312 includes an AI processing module 3121, an optical driving module 3122, a voice processing module 3123, and a sensing processing module 3124. The sensing processing module 3124 is used to receive detection signals from the illuminance sensor 140, the gyroscope sensor, and the obstacle detection and rebound component, and complete the parsing and forwarding. The modules are bidirectionally electrically connected through the motherboard bus. The bidirectional electrical connection of the motherboard bus allows for rapid data exchange between the modules, improving the overall response speed of the local control unit 300. The AI ​​processing module 3121 pre-stores anchor-frame neural network AI posture detection models such as YOLOv2-v5, Faster R-CNN, and SSD, enabling local real-time recognition of poor posture. Image data is not transmitted externally; local real-time recognition allows for faster posture detection response, and the lack of external image data transmission effectively protects user privacy and prevents leakage of personal image data. The power management module 313 provides stable power to all hardware modules and supports power-off memory. Stable power supply ensures continuous operation of all hardware modules, and the power-off memory function saves user settings, eliminating the need for readjustment upon power restoration. The communication module 340 integrates a Wi-Fi chip 341 with Wi-Fi 802.11 b / g / n protocol and a Bluetooth chip 342 with Bluetooth 5.0, responsible for wireless data transmission between the local control unit 300 and user devices. It supports local Bluetooth linkage in offline mode. The Wi-Fi chip 341 enables remote wireless communication with the cloud and user devices, while the Bluetooth chip 342 enables local device linkage in offline mode, allowing interactive control of the desk regardless of network connectivity. The present invention also includes a cloud service module in the cloud server. The Wi-Fi chip 341 can establish wireless communication with the cloud service module and is responsible for realizing wireless data transmission between the local control unit 300, the cloud service module, and the user terminal device.

[0020] It is worth noting that the control motherboard 310 also integrates an AI posture recognition module 320 and a multimodal interaction module 330. The AI ​​posture recognition module 320 realizes the acquisition and recognition of the user's posture, and the multimodal interaction module 330 provides the user with multiple operation and interaction methods to improve the ease of use of the desk. The AI ​​posture recognition module 320 includes a camera 321 and an image acquisition module 322. The camera 321 penetrates the front of the housing of the local control unit 300 and faces the user, so that the acquisition range of the camera 321 covers the upper body area from the user's shoulders and neck to the waist. This acquisition range can accurately capture the user's posture state and provide complete and clear image information for posture recognition. It can acquire user posture images in real time and run a neural network AI posture detection model based on the computing chip 311 to accurately identify three bad postures: hunchback, head tilt, and slouching. The computing chip 311 provides sufficient computing power support for the operation of the posture detection model to ensure the real-time performance and accuracy of posture recognition. The multimodal interaction module 330 includes a voice unit 331, a touch screen 332, and a display chip 333. The display chip 333 provides driving support for the screen display of the touch screen 332, which enables visual operation and displays device status information. The voice unit 331 acquires voice commands and plays voice information. The voice unit 331 includes a microphone 3311, a speaker 3312, an offline voice chip 3313, and an online voice module 3314. The microphone 3311 and the speaker 3312 are both located on the inner front side of the housing of the local control unit 300. This position allows the microphone 3311 to clearly acquire the user's voice commands, while also allowing the speaker to... The sound of the 3312 can be transmitted to the user more clearly, and the internal mounting method can also protect the components from external damage. The local control unit 300 corresponding to the microphone 3311 has a sound acquisition hole, which allows external sounds to be smoothly transmitted to the microphone 3311, improving the clarity of voice acquisition. The local control unit 300 corresponding to the speaker 3312 has multiple sound outlet holes on its shell, which allows the sound of the speaker 3312 to be evenly diffused, improving the voice playback effect. The touch screen 332 extends outward from the shell of the local control unit 300. The outward structure allows users to more conveniently perform touch operations and view screen information, improving the human-computer interaction experience. like Figures 1-7 As shown, this embodiment also provides a multimodal interactive system for preventing myopia, based on the above-mentioned multimodal interactive intelligent height-adjustable study desk for preventing myopia, including: I. Seating Sensing and Function Activation: Based on AI algorithms, the AI ​​posture recognition module 320 detects the user's sitting / leaving status. If the user is detected sitting, the local control unit 300 sends working instructions to the full-spectrum eye-protection lighting fixture 120, the AI ​​posture recognition module 320, and the multimodal interaction module 330. The full-spectrum eye-protection lighting fixture 120 performs a slow-on action and defaults to the learning mode. The illuminance sensor 140 detects the ambient light intensity in real time and adjusts it to a constant illuminance of 700LX through the optical drive module 3122. If the user is detected leaving, the full-spectrum eye-protection lighting fixture 120 is slowly turned off after a preset delay, and all functional modules return to standby mode. II. Local Posture Recognition in Real Time: The AI ​​Posture Recognition Module 320 continuously collects images of the user's upper body sitting posture from the shoulders and neck to the waist through the camera 321, and transmits the image data to the local control unit 300. The AI ​​processing module 3121, relying on the local computing power of the computing chip 311, runs anchor-frame neural network AI posture detection models such as YOLOv2-v5, Faster R-CNN, and SSD to identify in real time whether the user has three types of bad sitting postures: hunchback, head tilt, and slouching. All image data is processed only within the local control unit 300 and is not transmitted to the outside. 3. Poor Posture Reminder: If the AI ​​processing module 3121 detects poor posture, it immediately triggers the multimodal interaction module 330 to issue a voice correction reminder through the speaker 3312, and at the same time displays the posture correction prompt information on the touch screen 332; if the user continues to maintain poor posture for more than a preset threshold, the local control unit 300 will link the full-spectrum eye-protection lighting fixture 120 to flash slightly to enhance the reminder effect. IV. Intelligent Eye-Friendly Lighting Adjustment: The full-spectrum eye-friendly lighting fixture 120 collects real-time illumination data of the desktop 100 and surrounding environment through the illuminance sensor 140 and feeds it back to the local control unit 300. The optical drive module 3122 automatically adjusts the brightness of the upper lamp group 123 and the lower lamp group 122 according to the illumination data to maintain a constant illuminance of 700LX. Users can also manually control the independent switching, brightness adjustment, and switching between learning mode and daily lighting mode of the upper lamp group 123 and the lower lamp group 122 through the voice unit 331 or the touch screen 332 of the multimodal interaction module 330. In daily lighting mode, the brightness of the upper lamp group 123 and the lower lamp group 122 is automatically reduced. The upper and lower lamp groups are controlled by independent drive chips to achieve precise adjustment. V. Intelligent Lifting and Adjustment: Users can send desktop lifting commands via the hand control panel 240, voice unit 331, or touch screen 332. After the commands are transmitted to the motor controller 211, its internal lifting control module controls two lifting motors 223 to work together, driving the synchronous rod 2231 and the lead screw 2221 to achieve synchronous lifting of all four legs. The lifting adjustment range is 590mm-940mm. During the lifting process, the absolute value encoder height sensor collects desktop height data in real time to ensure lifting accuracy. The gyroscope sensor detects the desktop tilt state 100, and the resistance rebound component detects the lifting resistance. If any module detects an abnormality, the lifting motor 223 is immediately triggered to stop working. At the same time, based on the height data entered by the user, the local control unit 300 can automatically calculate and adapt the optimal learning height using the formula (height × 0.55) ± 20mm. VI. Local Data Storage and Cloud Interaction: The local control unit 300 stores information such as posture recognition data, lighting adjustment parameters, lifting height data, and usage time locally. The power management module 313 implements power-off memory function. The local control unit 300 establishes wireless communication with the remote cloud service module through the Wi-Fi chip 341 of the communication module 340 to realize the uploading and synchronization of the above data. The cloud service module pushes primary to junior high school teaching resources, stories, music, and other content to the desk and realizes audio and video display through the speaker 3312 and the touch screen 332. At the same time, the cloud service module can push device firmware upgrade packages to complete the online iteration of the system. VII. Offline Multimodal Linkage Control: When there is no network connection, the communication module 340 automatically switches to Bluetooth mode, supporting local linkage between the desk and the user's Bluetooth device. It transmits commands to the motor controller 211 via Bluetooth to achieve simple control of the lifting and lowering of the desktop 100. At the same time, the offline voice chip 3313 of the multimodal interaction module 330 remains active. The local control unit 300 acts as the offline master controller, directly controlling the on / off, brightness adjustment, and lighting mode switching of the full-spectrum eye-protection lighting fixture 120 via the serial port. After receiving and parsing the offline voice commands, the offline voice chip 3313 of the multimodal interaction module 330 triggers the local control unit 300 to execute the above lighting control and desktop lifting and lowering operations, thus eliminating the limitations of the network scenario. When using the multimodal interactive intelligent height-adjustable learning desk and system for myopia prevention of the present invention, firstly, the desk detects the user's sitting position through the AI ​​posture recognition module 320, triggering the local control unit 300 to issue working instructions to the full-spectrum eye-protection lighting fixture 120, the AI ​​posture recognition module 320, and the multimodal interaction module 330. The full-spectrum eye-protection lighting fixture 120, with the cooperation of the illuminance sensor 140, is adjusted to a constant illuminance of 700 LX by the optical drive module 3122 and defaults to the learning mode. Then, the AI ​​posture recognition module 320 continuously collects images of the user's upper body posture through the camera 321, relying on the local computing power of the computing chip 311 and the detection model of the AI ​​processing module 3121 to achieve local real-time recognition of poor posture. After recognizing poor posture, it immediately provides dual reminders via voice and screen through the multimodal interaction module 330. If the user continues to have poor posture, the full-spectrum eye-protection lighting fixture 120 will also be activated to reinforce the reminder. Then, the full-spectrum eye-protection lighting fixture 120... The spectral eye-protection lighting fixture 120 can automatically adjust the brightness of the upper lamp group 123 and the lower lamp group 122 based on the detection data of the illuminance sensor 140. Users can also manually adjust the lighting parameters and the height of the desktop 100 through the hand control panel 240, the voice unit 331, or the touch screen 332. During the lifting process, the absolute encoder, gyroscope sensor, and obstacle detection and rebound component will monitor the operating status in real time. If an abnormality is encountered, the lifting motor 223 will be stopped immediately to ensure safe use. Finally, the local control unit 300 will store various usage data of the desk locally. At the same time, it can synchronize data with the cloud service module through the Wi-Fi chip 341 of the communication module 340. The cloud will push teaching resources and support online firmware upgrades. When there is no network connection, the communication module 340 will automatically switch to Bluetooth mode to realize local control of the desktop lifting. The offline voice chip 3313 will also remain working, allowing users to realize various lighting controls through offline voice, completely eliminating the limitations of network scenarios. Those skilled in the art will understand that the process of implementing all or part of the steps of the above embodiments can be carried out by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0021] 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 preferred examples and are not intended to limit 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 claimed invention.

Claims

1. A multimodal interactive intelligent height-adjustable study desk for preventing myopia, comprising a desktop (100), characterized in that: A bookcase (110) is fixedly installed at the rear of the top of the desktop (100). A full-spectrum eye-protection lighting fixture (120) is installed above the desktop (100). A lifting mechanism (200) is installed at the bottom of the desktop (100). The lifting mechanism (200) includes a fixed frame (210) fixed to the bottom of the desktop (100) and two sets of lifting components (220) fixed to the left and right sides of the bottom of the fixed frame (210). The device includes a pair of outer support legs (221) and a pair of inner support legs (222). The inner support legs (222) are fitted inside the outer support legs (221) and are slidably connected to the outer support legs (221). Each lifting assembly (220) is equipped with a lifting motor (223) for controlling the lifting of the inner support legs (222) in that lifting assembly (220). A local control unit (300) is installed on the inner wall of the bookcase (110) in the upper right corner of the desktop (100).

2. The multimodal interactive intelligent height-adjustable study desk for myopia prevention according to claim 1, characterized in that: The full-spectrum eye-protection lighting fixture (120) is parallel to the desktop (100), with the bottom surface of the full-spectrum eye-protection lighting fixture (120) facing the top surface of the desktop (100). A pair of fixing brackets (121) are fixed at the rear edge of the full-spectrum eye-protection lighting fixture (120), and the two fixing brackets (121) are fixedly connected to the left and right rear ends of the bookcase (110) respectively.

3. The multimodal interactive intelligent height-adjustable learning desk for preventing myopia according to claim 2, characterized in that: The full-spectrum eye-protection lighting fixture (120) is an integrated aluminum alloy double lamp group structure. The bottom of the full-spectrum eye-protection lighting fixture (120) is provided with a lower lamp group (122), which is used to illuminate the desktop (100). The top of the full-spectrum eye-protection lighting fixture (120) is provided with an upper lamp group (123), which is used to illuminate the external environment. The full-spectrum eye-protection lighting fixture (120) is externally connected to an illuminance sensor (140).

4. The multimodal interactive intelligent height-adjustable learning desk for preventing myopia according to claim 3, characterized in that, The two sets of lifting components (220) have a total of four outer support legs (221) and four inner support legs (222). The four inner support legs (222) are fixed at the four corners of the bottom of the fixed frame (210). The lifting motor (223) is located between the tops of the two inner support legs (222) on the same set of lifting components (220). The lifting motor (223) is coaxially connected to a synchronizing rod (2231). The cross-section of the synchronizing rod (2231) is hexagonal, and the synchronizing rod (2231) passes through the lifting... The output end of the lifting motor (223) and the first and last ends of the synchronizing rod (2231) extend into the corresponding two inner support legs (222). The inner support legs (222) are coaxially rotatably connected to the lead screw (2221). The top of the lead screw (2221) is connected to the end of the shaft of the synchronizing rod (2231) by a steering gear. When the lifting motor (223) is working, the lifting motor (223) drives the synchronizing rod (2231) to rotate, so that the two lead screws (2221) located at both ends of the synchronizing rod (2231) rotate synchronously.

5. The multimodal interactive intelligent height-adjustable learning desk for preventing myopia according to claim 4, characterized in that: The outer support leg (221) is coaxially fixed with an inner sleeve rod (2211). The lead screw (2221) is coaxially sleeved in the inner sleeve rod (2211) and threadedly connected to the inner sleeve rod (2211). A motor controller (211) is installed on the inner side of the fixed frame (210). The motor controller (211) is equipped with a lifting control module. The motor controller (211) is used to synchronously control the operation of two lifting motors (223).

6. The multimodal interactive intelligent height-adjustable study desk for preventing myopia according to claim 1, characterized in that: A foot plate (2212) is fixed between the bottom ends of two adjacent outer support legs (221), and rubber feet (2213) are installed at the bottom end faces of the foot plate (2212) at both ends.

7. The multimodal interactive intelligent height-adjustable learning desk for preventing myopia according to claim 1, characterized in that: The local control unit (300) includes a control motherboard (310), which is equipped with a computing chip (311), a driver chip (312), and a power management module (313). The driver chip (312) includes an AI processing module (3121), an optical driving module (3122), a voice processing module (3123), and a sensing processing module (3124). The modules are bidirectionally electrically connected through the motherboard bus. The control motherboard (310) is equipped with a communication module (340).

8. The multimodal interactive intelligent height-adjustable learning desk for preventing myopia according to claim 7, characterized in that: The control motherboard (310) also integrates an AI posture recognition module (320), which includes a camera (321) and an image acquisition module (322). The camera (321) passes through the front end of the housing of the local control unit (300) and faces the user, so that the acquisition range of the camera (321) covers the upper body area between the user's shoulders and neck and waist.

9. The multimodal interactive intelligent height-adjustable study desk for preventing myopia according to claim 7, characterized in that: The control motherboard (310) also integrates a multimodal interaction module (330), which includes a voice unit (331), a touch screen (332) and a display chip (333). The voice unit (331) includes a microphone (3311), a speaker (3312), an offline voice chip (3313) and an online voice module (3314).

10. A multimodal interactive system for preventing myopia, based on the multimodal interactive intelligent height-adjustable learning desk for preventing myopia as described in any one of claims 1-9, characterized in that, Includes the following steps:

1. Seating Sensing and Function Activation: Based on AI algorithms, the AI ​​posture recognition module (320) detects the user's sitting / leaving status. If the user is detected sitting, the local control unit (300) sends working instructions to the full-spectrum eye-protection lighting fixture (120), the AI ​​posture recognition module (320), and the multimodal interaction module (330). The full-spectrum eye-protection lighting fixture (120) performs a slow-on action and defaults to the learning mode. The illuminance sensor (140) detects the ambient light intensity in real time and adjusts it to a constant illuminance of 700LX through the optical drive module (3122). If the user is detected leaving the seat, the full-spectrum eye-protection lighting fixture (120) is slowly turned off after a preset delay, and each functional module returns to standby status. II. Local Posture Recognition in Real Time: The AI ​​Posture Recognition Module (320) continuously collects images of the user's upper body sitting posture from the shoulders and neck to the waist through the camera (321), and transmits the image data to the local control unit (300). The AI ​​processing module (3121) relies on the local computing power of the computing chip (311) to run anchor-frame neural network AI posture detection models such as YOLOv2-v5, Faster R-CNN, and SSD to identify in real time whether the user has three types of bad sitting postures: hunchback, head tilt, and slouching. All image data is processed only in the local control unit (300) and is not transmitted to the outside.

3. Poor Posture Reminder: If the AI ​​processing module (3121) detects poor posture, it immediately triggers the multimodal interaction module (330) to issue a voice correction reminder through the speaker (3312) and display the posture correction prompt information on the touch screen (332); if the user continues to maintain poor posture for more than the preset threshold, the local control unit (300) will link the full-spectrum eye-protection lighting fixture (120) to flash slightly to enhance the reminder effect; IV. Intelligent eye-protection lighting adjustment: The full-spectrum eye-protection lighting fixture (120) collects real-time light data of the desktop (100) and surrounding environment through the illuminance sensor (140) and feeds it back to the local control unit (300). The optical drive module (3122) automatically adjusts the brightness of the upper lamp group (123) and the lower lamp group (122) according to the light data to maintain a constant illuminance of 700LX. Users can also manually control the independent switching, brightness adjustment and learning mode and daily lighting mode of the upper lamp group (123) and the lower lamp group (122) through the voice unit (331) or the touch screen (332) of the multimodal interaction module (330). In the daily lighting mode, the brightness of the upper lamp group (123) and the lower lamp group (122) is automatically reduced. The upper and lower lamp groups are controlled by independent drive chips to achieve precise adjustment. V. Intelligent Lifting and Adjustment: Users can send desktop lifting commands via hand control panel (240), voice unit (331) or touch screen (332). After the command is transmitted to motor controller (211), its internal lifting control module controls two lifting motors (223) to work together, driving the synchronous rod (2231) and lead screw (2221) to achieve synchronous lifting of four legs. The lifting adjustment range is 590mm-940mm. During the lifting process, the absolute value encoder height sensor collects desktop height data in real time to ensure lifting accuracy. The gyroscope sensor detects the tilt state of the desktop (100), and the resistance rebound component detects the lifting resistance. When any module detects an abnormality, the lifting motor (223) is immediately triggered to stop working. At the same time, the local control unit (300) can automatically calculate and adapt the optimal learning height based on the height data entered by the user using the formula (height × 0.55) ± 20mm. VI. Local Data Storage and Cloud Interaction: The local control unit (300) stores information such as posture recognition data, lighting adjustment parameters, lifting height data, and usage time locally. The power management module (313) realizes the power failure memory function. The local control unit (300) establishes wireless communication with the remote cloud service module through the Wi-Fi chip (341) of the communication module (340) to realize the uploading and synchronization of the above data. The cloud service module pushes primary to junior high school teaching resources, stories, music and other content to the desk, and realizes audio and video display through the speaker (3312) and touch screen (332). At the same time, the cloud service module can push the device firmware upgrade package to complete the online iteration of the system. VII. Offline Multimodal Linkage Control: When there is no network connection, the communication module (340) automatically switches to Bluetooth mode, supports the establishment of local linkage between the desk and the user's Bluetooth device, and transmits instructions to the motor controller (211) via Bluetooth to realize simple control of the lifting and lowering of the desktop (100); at the same time, the offline voice chip (3313) of the multimodal interaction module (330) keeps working, and the local control unit (300) acts as the offline master controller, directly realizing the switching, brightness adjustment and lighting mode switching control of the full-spectrum eye-protection lighting fixture (120) through the lighting control serial port. After the offline voice chip (3313) of the multimodal interaction module (330) receives and parses the offline voice instructions, it triggers the local control unit (300) to execute the above lighting control and desktop lifting and lowering operations, thus getting rid of the network scene limitation.

Images