Robotic Arm Positioning With Laser-Based Offset Correction
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Solution Overview
Problem
Existing robotic systems face challenges in precisely positioning components relative to each other without relying on static offset values, which limits their flexibility and accuracy, especially when dealing with components of varying geometries and tolerances.
Innovation Solution
A method utilizing a robotic arm system with a laser scanning unit to detect distances between components and provide position correction values, allowing for coordinate-based movement and precise positioning of components, enabling dynamic offset calculations and improved accuracy without fixed positioning requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static offset values are used for positioning components, then the positioning process is simplified, but the flexibility and accuracy are limited when dealing with components of varying geometries and tolerances
Solution Approach 1:
The patent applies dynamics by replacing static offset values with dynamic real-time measurements. The laser scanning unit continuously measures actual positions of components, and the control unit dynamically calculates corrected positions based on current geometric conditions, allowing the system to adapt to varying geometries and tolerances while maintaining positioning accuracy
Solution Approach 2:
The patent implements feedback through the laser scanning unit that continuously monitors component positions and feeds this information back to the control unit. The control unit processes this feedback data and adjusts the robotic arm positioning accordingly, creating a closed-loop system that maintains accuracy despite variations in component geometry and tolerances
2Manufacturing precision
If real-time laser scanning and position correction are implemented, then positioning accuracy is improved, but system complexity increases
Solution Approach 1:
The patent applies universality by designing a modular system where the laser scanning unit, robotic arm, and control unit can serve multiple functions. The laser scanning unit can scan different components and surfaces, the robotic arm can perform various positioning tasks, and the control unit can handle different calculation algorithms, reducing overall system complexity through multi-functionality
Solution Approach 2:
The patent uses an intermediary approach by introducing a coordinate system transformation layer between the laser scanning measurements and the robotic arm positioning. The control unit acts as an intermediary that transforms scanned coordinates into robotic arm control commands, simplifying the interface between measurement and actuation subsystems
3Adaptability or versatility
If dynamic offset calculations are used instead of static values, then flexibility and accuracy are enhanced, but measurement and detection difficulty increases
Solution Approach 1:
The patent replaces complex mechanical measurement systems with optical laser scanning. The laser scanning unit uses light-based measurement instead of mechanical contact sensors, eliminating the need for physical probes and reducing the complexity of mechanical measurement mechanisms while enabling real-time dynamic offset calculations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for flexible and precise positioning of components independently of reference objects, enhancing the accuracy of robotic systems and enabling the use of components with varying geometries and tolerances, and facilitates joining operations such as welding.
Implementation Method 1
providing at least one laser scanning unit configured to detect a distance between the first component and the second component
Data Source
AI summary
A method for positioning a first component relative to a second component by a robotic arm system, comprising: providing at least a first robot arm arranged to hold and move a first component relative to a second component, wherein the robot arm is arranged to be moved coordinate-based; providing at least one laser scanning unit to detect a distance between the first component and the second component; picking up the first component by the first robot arm and moving the first component relative to the second component according to a coordinate-based calculated position; detecting a distance of the first component in its coordinate-based calculated position to the second component by the laser scanning unit; providing a position correction value based on the detected distance of the first component to the second component; moving at least one of the components to an end position based on the provided position correction value.