Oral occlusion mark image acquisition and dual-mode display transmission device

Abstract

An oral occlusion mark image acquisition and dual-mode display transmission device comprises a handheld collector and a terminal controller, the handheld collector is in a thin and long column shape, the front end of the handheld collector is an acquisition end portion, the rear end of the handheld collector is a grab handle, an IDC flat cable connected with the terminal controller is integrated at the bottom of the grab handle, the acquisition end portion is provided with an acquisition module and an illumination module, and the illumination module is connected with the handheld collector. The illumination module comprises a dual-ring polarization illumination structure and a driving control module, the dual-ring polarization illumination structure is connected with the driving control module, and the output of the acquisition module is connected with the IDC flat cable; the terminal controller is provided with a touch screen and a display module, the IDC flat cable is connected with the display module, and the display module is connected with the touch screen. According to the utility model, the whole process optimization from image acquisition and processing to storage and display is realized.

Description

Technical Field

[0001] This utility model belongs to the field of dental medical equipment and relates to a device for acquiring and transmitting oral occlusal impression images in a dual-mode display. Background Technology

[0002] With improved living standards and advancements in implant technology, dental implant restoration has become an important treatment option for missing teeth. Studies show that over 98.1% of implants can remain viable for more than 5 years after placement. However, the success of dental implants is influenced by various factors, especially the adjustment of occlusion, which directly determines the stability of the implant restoration and the long-term oral health of the patient. Malocclusion can lead to temporomandibular joint disorders, periodontitis, and even systemic health problems.

[0003] Traditionally, dentists often rely on physical indicators such as bite paper when adjusting occlusion, but these methods are limited by the dentist's subjective experience and are subject to certain errors. In addition, while existing digital occlusion analysis systems (such as T-ScanⅢ and TeeTester) can provide higher accuracy and reliability, they generally face the following problems: (1) High price: This makes them only available to the high-end medical market and cannot be popularized in small and medium-sized medical institutions. (2) High maintenance cost: The sensitivity of the sensor diaphragm of these scanning devices decreases with the increase of use, which affects the accuracy of the 3D modeling data of teeth and requires frequent maintenance. (3) Complex to use: Some devices are cumbersome to operate and require professional training.

[0004] Therefore, traditional equipment and existing high-end technology equipment generally cannot meet the needs of small and medium-sized medical institutions or ordinary home users. For the vast majority of patients, especially in the low-to-mid-range market, the high cost and complexity of using and maintaining existing equipment are the main obstacles limiting their widespread adoption. Summary of the Invention

[0005] To overcome the shortcomings of existing dental equipment in terms of poor imaging quality, complex operation, and low data security in the oral environment, this utility model provides an oral occlusal impression image acquisition and dual-mode display and transmission device. Through the collaborative hardware design of a handheld acquisition device and a terminal controller, the entire process from image acquisition, processing to storage and display is optimized. By adopting a white light polarized illumination architecture, dynamic dimming technology, and local encrypted data transmission, the device significantly improves anti-interference, operational efficiency, and data security, while meeting the requirements of real-time performance and environmental adaptability.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A device for acquiring and transmitting oral occlusal impression images in a dual-mode display format includes a handheld acquisition unit and a terminal controller. The handheld acquisition unit is elongated and cylindrical, with a acquisition end at the front and a handle at the rear. An IDC cable connected to the terminal controller is integrated into the bottom of the handle. The acquisition end is equipped with an acquisition module and an illumination module. The illumination module includes a dual-ring polarized illumination structure and a drive control module. The dual-ring polarized illumination structure is connected to the drive control module. The output of the acquisition module is connected to the IDC cable. The terminal controller is equipped with a touch screen and a display module. The IDC cable is connected to the display module, and the display module is connected to the touch screen.

[0008] Furthermore, in the dual-ring polarized illumination structure, a high color rendering white LED is installed in the inner ring and arranged along a 1.5mm annular groove at the front edge of the lens, equipped with a linear polarizer; a high brightness white LED is installed in the outer ring and arranged on an oblique support in the middle of the lens, equipped with a linear polarizer; a honeycomb light-shielding grid is provided between the inner and outer rings.

[0009] Furthermore, the optical lens of the acquisition module adopts an OV2640 camera module, with a 5mm diameter fixed-focus optical lens configured in front of the camera module, and a polarization-selective anti-reflection coating coated on the lens surface; a switchable filter wheel is installed at the front end of the camera module, including an infrared cut-off filter and a narrowband green light filter.

[0010] Furthermore, in the drive control module, the inner ring LED uses constant current drive, the outer ring LED uses PWM dimming, and the terminal controller sends commands through UART to realize independent adjustment of the brightness of the inner and outer rings, and supports three modes: standard, reflective, and low illumination.

[0011] Preferably, the handle surface is covered with anti-slip silicone; the handheld collector has a tungsten steel counterweight inside.

[0012] Preferably, the electromagnetic shielding layer of the IDC cable supports MIPI CSI image transmission and UART control signal transmission;

[0013] More preferably, the touchscreen is installed at an angle, and a dual-button dimming knob is provided on the side.

[0014] The beneficial effects of this utility model are mainly reflected in:

[0015] 1. Optimized Optical Path Structure: A multi-source light source switching and dual-ring polarized illumination design, combined with inner and outer ring polarized light sources, effectively reduces light cross-interference, ensuring uniform illumination and high image contrast during acquisition. This design can automatically adjust the light source intensity according to changes in ambient light, adapting to different oral cavity conditions and ensuring stable and high-quality image acquisition.

[0016] 2. High-efficiency data processing and remote transmission: Image processing achieves high-speed data transmission through the MIPI CSI interface, combined with embedded hardware acceleration technology to ensure real-time image processing and transmission. Encryption technology is used during data transmission to ensure user data security, while supporting efficient cloud analysis and storage, greatly improving diagnostic efficiency.

[0017] 3. User-friendly design: Focusing on user experience, the device is designed in an ergonomic style, making it lightweight and comfortable to hold for extended periods of use. The control interface is simple and intuitive, with a touchscreen and dimming knob that allow users to easily adjust image display and light intensity, improving ease of operation. Attached Figure Description

[0018] Figure 1 This is a block diagram of the principle of a device for acquiring and transmitting oral occlusal impression images in a dual-mode display.

[0019] Figure 2 This is a flowchart of the workflow of the oral occlusal impression image acquisition and dual-mode display transmission device.

[0020] Figure 3 This is a schematic diagram of a handheld data collector.

[0021] Figure 4 This is a schematic diagram of the terminal controller.

[0022] Figure 5 This is an overall diagram of the oral occlusal impression image acquisition and dual-mode display transmission device. Detailed Implementation

[0023] The present invention will now be further described with reference to the accompanying drawings.

[0024] Reference Figures 1-5 A device for acquiring and transmitting oral occlusal impression images in a dual-mode display format, comprising:

[0025] Handheld data collector, as shown below:

[0026] Shell structure: Slim cylindrical design, length 20±2cm, diameter ≤15mm; the shell is made of polycarbonate through one-piece injection molding and is equipped with IP67 waterproof sealing interface.

[0027] The sampling end and handle: The front end is a sampling end with a diameter of ≤15mm, and the rear end is an ergonomic handle with a non-slip silicone coating (coefficient of friction ≥0.8); it is equipped with a tungsten steel counterweight (center of gravity ≤3cm from the grip center), and the total weight of the device is ≤250g.

[0028] IDC cable: Integrated into the bottom of the handle, it adopts a 30-core twisted pair structure, with a built-in electromagnetic shielding layer (shielding effectiveness ≥60dB), and supports MIPI CSI image transmission (maximum 1Gbps) and UART control signal transmission;

[0029] The terminal controller is as follows:

[0030] Body structure: The shell size is approximately 20×15×3cm, made of polycarbonate and ABS composite material, and designed with anti-slip texture.

[0031] Display and interaction components: Equipped with a 7-inch resistive touchscreen (800×480), the screen is installed at a 10° tilt; a dual-button dimming knob (using a Hall encoder EC11) is set on the side to enable convenient user operation and brightness adjustment.

[0032] The acquisition end is equipped with an acquisition module and an illumination module. The illumination module includes a dual-ring polarized illumination structure and a drive control module. The dual-ring polarized illumination structure is connected to the drive control module. The output of the acquisition module is connected to the IDC cable.

[0033] The dual-ring polarized illumination structure is as follows:

[0034] Inner ring: Six high color rendering white LEDs (color temperature 5000K, color rendering index CRI > 95) are installed and arranged in a 1.5mm annular groove along the front edge of the lens, equipped with a linear polarizer (polarization direction 0°); the illumination angle is about 15° and the illuminance range is 500-1500 lux;

[0035] Outer ring: Equipped with 8 high-brightness white LEDs (color temperature 6500K, brightness > 3000 cd / m²). 2 The lens is mounted on an angled support in the middle of the lens and equipped with a linear polarizer (polarization direction 90°); the illumination angle is about 45° and the illuminance range is 1000-3000 lux.

[0036] Physical isolation: A honeycomb-shaped light-shielding grid (0.8mm aperture, 3:1 depth-to-width ratio) is installed between the inner and outer rings to effectively block cross-interference of light rays and ensure uniform lighting.

[0037] Drive control module: The inner ring LED uses constant current drive (maximum current 350mA), and the outer ring LED uses PWM dimming (frequency 10kHz, duty cycle 0-100%). The terminal sends commands through UART to realize independent adjustment of the brightness of the inner and outer rings, and supports three modes: standard, reflective and low light.

[0038] The intelligent lighting strategy automatically adjusts the lighting parameters according to the specific imaging scene, as follows:

[0039] model Inner ring brightness Outer ring brightness Applicable Scenarios Standard mode 800 lux 1500 lux Conventional occlusal imaging High reflectivity mode 1200 lux 800 lux Metal restoration area Low light mode 500 lux 2000lux Deep molar area photography

[0040] The acquisition module includes an optical lens, a photoelectric conversion circuit, an image sensor, and an encoding circuit connected in sequence. The core imaging of the optical lens adopts the OV2640 camera module, with a 5mm diameter fixed-focus optical lens (adjustable focal length range of 5-50mm) in front. The lens surface is coated with a polarization selective anti-reflection film (transmittance of p-polarized light >98%, reflectance of s-polarized light >95%).

[0041] The front end is equipped with a switchable filter wheel, which includes an infrared cutoff filter (transmission 400-650nm, cutoff rate >99.9%) and a narrowband green light filter (transmission 530-550nm) to enhance image texture contrast.

[0042] The protective cover design of this embodiment is as follows: a detachable medical-grade transparent protective cover (thickness 0.3mm) is set on the outer layer of the collection end, the inner surface is coated with a superhydrophobic coating (contact angle > 160°), and a spiral guide groove (groove depth 0.2mm, spacing 1mm) is set on the outer edge. A magnetic adsorption structure (attraction force ≥ 3N) is adopted to realize quick replacement with one hand.

[0043] This design effectively guides the flow of saliva in the mouth, preventing liquid residue and contamination of optical components, while suppressing specular reflection (the front of the lens has a rotatable polarizing filter that is orthogonal to the polarization direction of the inner ring LED, reducing reflectivity by up to 82%).

[0044] The signal processing and anti-interference design is as follows: the imaging performance of OV2640 is optimized through hardware linkage, a strong noise reduction mode is adopted (such as setting register 0x530C to 0x67), and the brightness of the outer ring LED is automatically increased by 20% when the ambient humidity is >80% to compensate for the noise reduction loss.

[0045] Dynamic range optimization employs dual-zone metering (center weight 80%) and exposure time limiting (5-50ms), while edge enhancement technology improves the contrast of the bite line by 65%. The IDC cable has built-in electromagnetic shielding to ensure that the system malfunction rate is <0.001 times / hour in an electromagnetic interference environment of 40dBμV / m.

[0046] In the terminal controller of this embodiment, the hardware architecture is as follows: the main control system is based on STM32F103ZET6 (ARM Cortex-M3), and image acquisition, lighting adjustment, data transmission and display control are realized through a multi-bus hardware direct connection architecture.

[0047] Image data from handheld devices is received via the MIPI CSI interface (built-in DMA directly transfers to 64KB SRAM at a rate of 1.2Gbps), and camera parameters (exposure, white balance, etc.) are adjusted in real time using the SCCB protocol.

[0048] The interaction and display are as follows: a 7-inch RGB touch screen (800×480) is driven by an FSMC bus, which supports layer overlay display (real-time images and historical thumbnails); the touch signal is decoded by an XPT2046 chip, with a response time of <50ms.

[0049] The dual-button dimming knob outputs a PWM signal after optocoupler isolation, generating LED drive instructions (execution cycle < 10ms) to achieve precise light adjustment.

[0050] Data management and power control include: built-in eMMC 5.1 memory (64GB), which stores DICOM format images in partitions according to patient ID; equipped with a physical write protection switch to prevent accidental operation, and uses AES-128 encryption (hardware encryption engine built into ESP8266 module) to ensure data transmission security.

[0051] The power system uses a 6000mAh lithium polymer battery, supports QC3.0 fast charging (0-80% charge ≤ 1 hour), has a typical operating power consumption of about 2.8W, a continuous use time of >20 hours, and a standby mode power consumption as low as 0.05W (battery life up to 400 hours).

[0052] In this embodiment, the handheld data acquisition device and the terminal controller work together to acquire, process, and analyze high-quality image data of dental occlusion imprints in the oral cavity. Further analysis and diagnosis are then performed using algorithms deployed on a cloud server. The process includes the following steps:

[0053] Step 1. The data collection process is as follows:

[0054] First, the dentist will have the patient place a specific occlusal paper over the tooth that needs adjustment and bite down firmly to create a clear occlusal imprint on the target tooth surface. Then, the dentist will use this handheld device to collect data.

[0055] The optical acquisition module at the front of the handheld device employs dual-ring polarized LED illumination, combined with a filter wheel configuration, to optimize the optical imaging of occlusal impressions. Doctors can adjust the light intensity and shooting angle to obtain the best imaging results. The dimming knob within the device outputs a PWM signal (execution cycle <10ms) through optical coupling isolation, driving the LED light source for precise illumination adjustment to adapt to different oral environments and impression contrast requirements.

[0056] Step 2. Image acquisition and processing are as follows:

[0057] The front-end optical lens focuses the incident light onto the imaging surface of the CMOS image sensor through precise focusing. The photosensitive unit array generates analog electrical signals based on the light intensity distribution. Subsequently, the high-precision analog-to-digital converter (ADC) built into the sensor completes digital sampling in a line-by-line scanning manner, outputting the original Bayer format data stream. This data stream undergoes multi-level real-time correction through an integrated digital signal processor (ISP): a noise reduction algorithm based on spatial filtering suppresses dark current and random noise interference; an adaptive white balance (AWB) engine dynamically adjusts the RGB channel gain coefficients based on the statistical scene color temperature distribution to restore true colors; and a closed-loop feedback automatic exposure (AE) system dynamically optimizes the integration time and analog gain based on the histogram brightness distribution to ensure detail preservation under wide dynamic range lighting conditions.

[0058] After these preprocessing steps, the image data is JPEG encoded to compress the data size and make it suitable for transmission. The corrected image data is then transmitted to the terminal controller via a high-speed, low-power MIPI CSI-2 interface.

[0059] 3. Data storage and transmission are as follows:

[0060] Data storage and backtracking display: The terminal microcontroller communicates with the SD card via the SDIO interface, initializes the SD card, and manages file read and write operations through the FatFs file system. After initialization, the controller creates files and prepares storage areas. The controller reads data from the memory cache via DMA (Direct Memory Access) and writes it to the SD card in blocks. The size of each storage block is adjusted as needed to accommodate image data blocks of different sizes. After writing is complete, a secondary check is performed, the file is closed, and resources are released to ensure the integrity and security of the image data.

[0061] For subsequent image reading and retrieval, the corresponding image file is opened according to the file system index, and data is read in blocks according to the image's storage structure. During the reading process, the controller follows the file system structure, sequentially reading the stored data blocks from the SD card and transmitting the data to the processing unit for decoding and display. To ensure reading efficiency, the controller employs a caching mechanism to avoid frequent memory accesses during data reading, thereby improving overall system performance. After reading is complete, the image data is transmitted to the display for data playback.

[0062] Data Communication Transmission: The STM32 microcontroller achieves remote data upload through its integrated wireless communication module. After acquisition and preprocessing, the image data is first converted from the controller's DMA into compressed JPEG format to reduce data volume and improve transmission efficiency. The encoded image data is encapsulated into MQTT packets, each packet containing a message header (such as subject, message ID, QoS, etc.) and image data as the payload. During encapsulation, the controller segments the image data into blocks according to the protocol requirements, ensuring stable segmented transmission of large images. If the image data is large, the controller divides it into multiple packets, using the sequence number of each packet to ensure data order and integrity.

[0063] After data encapsulation, the microcontroller uses the wireless communication module to send the encapsulated data to the cloud server via the MQTT protocol. Before connecting to the cloud server, a stable connection is established via the wireless module to complete authentication and connection initialization. During data transmission, the controller publishes messages according to the preset QoS (Quality of Service) level to ensure that the data is successfully delivered to the cloud server at least once. Image data is transmitted in segments; each data packet is sent via the MQTT protocol. After receiving the messages, the cloud server reassembles the image data according to the sequence number, restoring it into a complete image file.

[0064] After receiving the image data, the cloud server will store it and make it available for doctors or users to view through the backend system. The server can also save the uploaded image data in the website database for easy access and processing later.

[0065] Step 4. Cloud analysis and result output, as follows:

[0066] The core algorithm is deployed on the website's cloud server. After retrieving images from the database, it processes and analyzes them, combining visual technology algorithms to extract key occlusal imprint features. The server-side deployment of visual analysis algorithms automatically processes occlusal imprint images and generates three data analysis charts:

[0067] Preliminary processing image: Removes environmental interference such as light and noise, enhances the contrast of occlusal impressions, and assists doctors in observing and judging more clearly.

[0068] Heatmap: Visually displays the density and intensity distribution of contact points in the bite imprint through color changes, helping doctors analyze the bite pressure areas.

[0069] Pressure Distribution Map: This map uses color-coded scales to show the specific pressure intensity in the tooth contact areas, providing a basis for occlusal adjustments.

[0070] The analysis results can be displayed on the web or mobile devices and provided to doctors to assist in clinical decision-making.

[0071] The solution in this embodiment improves imaging quality: by combining dual-ring polarized illumination and optical filtering, it ensures that the uniformity of illumination on the occlusal surface is >90%, significantly reduces specular reflectivity (by 82%), and improves edge contrast (by 65%), effectively enhancing the clarity and detail of the occlusal image. Combined with image processing algorithms, such as CLAHE local contrast enhancement and Canny edge detection, it further optimizes the capture of image details, making occlusal marks clearer and more discernible. Enhanced operational stability: The ergonomic handle and internal weight design reduce vibration during device operation (by 70%), while the 20cm acquisition end design adapts to the acquisition requirements of oral cavity depth, ensuring the accuracy of image acquisition. Through algorithm optimization, the system can reduce image errors caused by environmental factors or improper user operation during stable operation; Real-time performance and data security: The system's latency from image acquisition to display is <100ms, and the touch response time is <50ms, ensuring smooth operation. Simultaneously, local encrypted transmission is employed (bit error rate <1×10⁻⁶). -9 With tamper-proof storage (compliant with FIPS 140-2 Level 3 standards), the security of user data is effectively guaranteed. During data transmission, the system combines embedded hardware acceleration technology with encryption algorithms to ensure a balance between data security and processing speed, further improving real-time performance and data protection levels. Excellent environmental adaptability: The device has IP67 protection, equipped with a detachable medical-grade protective cover and a spiral guide channel design to effectively prevent saliva contamination and ensure the cleanliness of optical components. The combination of IDC cabling and dynamic dimming technology ensures stable signal transmission in complex oral environments. Simultaneously, the image processing algorithm can adaptively adjust to different oral environments, improving the system's stability and accuracy under various complex lighting conditions.

[0072] Through the structural design described above, the handheld device of this embodiment possesses efficient image acquisition, light adjustment, and data transmission functions, enabling precise acquisition and analysis of dental occlusal impression images in the oral environment. This device is suitable for small and medium-sized dental clinics and home users, providing an economical, convenient, and efficient solution.

[0073] The embodiments described in this specification are merely examples of implementations of the inventive concept and are for illustrative purposes only. The scope of protection of this utility model should not be considered limited to the specific forms described in these embodiments; rather, it extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. A device for acquiring and transmitting oral occlusal impression images in a dual-mode display, characterized in that, The device includes a handheld data acquisition unit and a terminal controller. The handheld data acquisition unit is a slender cylindrical shape with a data acquisition end at the front end and a handle at the rear end. An IDC cable connected to the terminal controller is integrated into the bottom of the handle. The data acquisition end is equipped with a data acquisition module and a lighting module. The lighting module includes a dual-ring polarized illumination structure and a drive control module. The dual-ring polarized illumination structure is connected to the drive control module. The output of the data acquisition module is connected to the IDC cable. The terminal controller is equipped with a touch screen and a display module. The IDC cable is connected to the display module, and the display module is connected to the touch screen.

2. The oral occlusal impression image acquisition and dual-mode display transmission device as described in claim 1, characterized in that, In the dual-ring polarized illumination structure, a high color rendering white LED is installed in the inner ring and arranged along a 1.5mm annular groove at the front edge of the lens, equipped with a linear polarizer; a high brightness white LED is installed in the outer ring and arranged on an oblique support in the middle of the lens, equipped with a linear polarizer; a honeycomb light-shielding grid is provided between the inner and outer rings.

3. The oral occlusal impression image acquisition and dual-mode display transmission device as described in claim 1 or 2, characterized in that, The optical lens of the acquisition module adopts an OV2640 camera module. A 5mm diameter fixed-focus optical lens is configured in front of the camera module, and the lens surface is coated with a polarization selective anti-reflection coating. The front end of the camera module is equipped with a switchable filter wheel, which includes an infrared cut-off filter and a narrowband green light filter.

4. The oral occlusal impression image acquisition and dual-mode display transmission device as described in claim 1 or 2, characterized in that, In the drive control module, the inner ring LED is driven by constant current, the outer ring LED is dimmed by PWM, and the terminal controller sends commands through UART to realize independent adjustment of the brightness of the inner and outer rings, and supports three modes: standard, reflective and low light.

5. The oral occlusal impression image acquisition and dual-mode display transmission device as described in claim 1 or 2, characterized in that, The handle is covered with anti-slip silicone; the handheld collector has a tungsten steel counterweight inside.

6. The oral occlusal impression image acquisition and dual-mode display transmission device as described in claim 1 or 2, characterized in that, The electromagnetic shielding layer of the IDC cable supports MIPI CSI image transmission and UART control signal transmission.

7. The oral occlusal impression image acquisition and dual-mode display transmission device as described in claim 1 or 2, characterized in that, The touchscreen is mounted at an angle, and a dual-button dimming knob is located on the side.

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