Dual-Sensor Oral Scanner for Accurate Movement Trajectory
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Solution Overview
Problem
Scanning devices with regular cameras face challenges in accurately calculating movement trajectories due to low frame rates of photosensitive elements, which hinder precise image classification and evaluation of oral health.
Innovation Solution
Incorporating both a general photosensitive element and a high-speed photosensitive element, the scanning device captures images at different frame rates to calculate accurate movement trajectories by comparing and correlating features in consecutive images, using high-speed elements for displacement tracking and general elements for high-quality imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a general photosensitive element is used to capture images, then image quality is maintained, but the frame rate is low making it difficult to calculate accurate movement trajectories
Solution Approach 1:
The patent divides the imaging function into two separate photosensitive elements: a first photosensitive element dedicated to capturing high-quality images at lower frame rates, and a second photosensitive element dedicated to capturing images at high frame rates for trajectory calculation. This segmentation allows each element to optimize for its specific function, resolving the contradiction between image quality and frame rate.
Solution Approach 2:
The second photosensitive element acts as an intermediary that provides high-frequency displacement data between the lower frame-rate images from the first photosensitive element. This intermediary element enables accurate trajectory calculation without requiring the main imaging element to operate at high frame rates, thus maintaining image quality while achieving accurate movement tracking.
2Productivity
If a high-speed photosensitive element is used to increase frame rate, then movement trajectory calculation improves, but image resolution decreases
Solution Approach 1:
The patent segments the imaging system into two specialized components: the first photosensitive element optimized for high resolution with lower frame rate, and the second photosensitive element optimized for high frame rate with lower resolution. This segmentation allows the system to achieve both high frame rate for trajectory calculation and high resolution for image quality without compromise.
Solution Approach 2:
Different parts of the imaging system are assigned different quality requirements based on their function. The first photosensitive element maintains high local quality (resolution) for image capture, while the second photosensitive element uses lower local quality (resolution) but higher frame rate for displacement measurement. This local quality differentiation resolves the contradiction between resolution and frame rate.
3Adaptability or versatility
If only a single photosensitive element is used, then device complexity is reduced, but the ability to simultaneously achieve high frame rate and high resolution is compromised
Solution Approach 1:
The patent implements multi-functionality by having two photosensitive elements work together: one element captures images for both visual documentation and trajectory analysis, while the other element supplements with high-frame-rate data specifically for movement tracking. This universal approach allows a single system to achieve both high-resolution imaging and high-frame-rate trajectory calculation that would be difficult with a single element.
Data Source
AI summary
Provided is a scanning device and a scanning method, which introduce high-speed photosensitive elements to assist in the calculation of movement trajectory. Taking advantage of the characteristics of the high-speed photosensitive elements, the scanning device is equipped with both a general photosensitive element and a high-speed photosensitive element. While scanning the target, it can also use the high-speed photosensitive element to obtain a more accurate movement trajectory.