Hybrid 3D Scanning System for Precision and Flexibility
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Solution Overview
Problem
Traditional three-dimensional laser scanners face challenges in flexibility, precision, and user convenience due to the need for mark points on objects and high complexity in optical tracking systems, which limits their applicability in intelligent manufacturing.
Innovation Solution
A positioning device and method combining mark point positioning and intelligent reverse positioning, utilizing a binocular camera and a third camera with non-overlapping visual fields, allowing flexible switching between modes, enabling high-precision scanning without mark points and simplifying user interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mark point tracking type three-dimensional scanning is used, then measurement precision is improved, but flexibility deteriorates due to the need to paste mark points on the object surface
Solution Approach 1:
The system dynamically switches between mark point tracking mode and optical tracking mode based on real-time detection of mark point presence. This dynamic adaptation allows the system to maintain high measurement precision when mark points are available while automatically transitioning to markerless optical tracking when mark points are absent, thereby resolving the contradiction between precision and flexibility
Solution Approach 2:
The system changes operational parameters by detecting the presence or absence of mark points and adjusting the scanning mode accordingly. When mark points are detected, the system uses mark point tracking parameters for high precision; when not detected, it switches to optical tracking parameters, enabling flexible adaptation without sacrificing measurement quality
2Adaptability or versatility
If optical tracking instrument combined with 3D spherical scanner is used, then flexibility is improved by eliminating mark points, but measurement precision deteriorates
Solution Approach 1:
The system uses mark points as an intermediary element that can be detected by the optical tracking system to enhance precision. When mark points are present on the object, they serve as reference features that improve measurement accuracy while still maintaining the flexibility of markerless scanning capability, thus resolving the precision deficit of pure optical tracking
Solution Approach 2:
The system achieves multi-functionality by integrating both mark point tracking and optical tracking capabilities into a single scanning system. This universal system can operate in high-precision mark point mode when needed and in flexible markerless mode when appropriate, eliminating the trade-off between precision and flexibility
3Ease of operation
If optical tracking instrument is added to enable markerless scanning, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The system performs self-service by automatically detecting the presence of mark points and autonomously selecting the appropriate scanning mode without requiring user intervention. This self-service capability simplifies operation while the intelligent mode selection algorithm manages the complexity of having multiple scanning capabilities, resolving the contradiction between ease of use and device complexity
Data Source
AI summary
A positioning device combining mark point positioning and intelligent reverse positioning and method thereof, comprising a binocular camera, a third camera, and a laser; the laser is used for emitting laser projection, the binocular camera is used for acquiring images with laser lines and reflective mark points on the surface of the scanned object, and the third camera is used for acquiring images with coding points and mark points in the peripheral environment; the method comprises the following steps of: S1. calibrating parameters of each camera under different scanning modes, and enabling the parameters of each camera to synchronously and correspondingly transform when the scanning modes are switched; S2. judging and switching the scanning mode into a mark point mode or an intelligent reverse tracking mode through the scanning scene. The two positioning modes are flexibly switched, and the use of a user is facilitated.