Robot Arm Positioning With Laser Feedback for Tolerance Accuracy
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Solution Overview
Problem
Existing methods for positioning components relative to each other in industrial settings, such as in the automotive or aerospace industries, often fail to maintain precise dimensions and tolerances, leading to incomplete production steps or obsolete products due to static offset limitations.
Innovation Solution
A method utilizing a robot arm system equipped with a laser scanning unit to detect distances between components and calculate dynamic position correction values, allowing for precise positioning of components based on coordinates, eliminating the need for fixed static offsets and improving absolute accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If static offset values are used for positioning components, then the positioning system is simple to operate, but the manufacturing precision deteriorates because static offsets are only valid for specific positions and cannot adapt to different reference positions
Solution Approach 1:
The patent applies dynamics by replacing static offset values with dynamic position correction values that are calculated based on actual measured distances between components. The laser scanning unit continuously measures distances, and the control unit calculates correction values in real-time, allowing the positioning system to adapt to different reference positions and maintain high precision without requiring fixed pre-programmed offsets for every possible position.
Solution Approach 2:
The patent implements feedback by using the laser scanning unit to measure the actual distance between the first and second components, then feeding this information back to the control unit which calculates position correction values. This closed-loop feedback mechanism ensures that the positioning system continuously adjusts based on actual measurements, maintaining manufacturing precision while avoiding the need for complex pre-programming of static offsets for all possible positions.
2Adaptability or versatility
If fixed positioning of components is implemented, then the positioning method is easy to manufacture, but the adaptability deteriorates because fixed positioning cannot accommodate different reference object positions
Solution Approach 1:
The patent applies self-service by enabling the positioning system to automatically determine its own correction values through real-time measurement with the laser scanning unit. Instead of requiring manual pre-programming of fixed positioning parameters for different scenarios, the system autonomously measures distances and calculates appropriate position correction values, making it adaptable to different reference positions while maintaining ease of implementation through automation.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting position correction values based on measured distances between components. Rather than using fixed positioning parameters, the system changes the positioning parameters (correction values) in real-time based on actual measurements, allowing adaptability to different reference positions while keeping the implementation simple through automated calculation.
3Measurement precision
If traditional robot positioning methods are used, then the device complexity is low, but the measurement precision deteriorates because traditional methods cannot achieve the required tolerance levels for component positioning
Solution Approach 1:
The patent introduces an intermediary (the laser scanning unit) between the robot arm and the components being positioned. This intermediary device专门化 for high-precision distance measurement enables the system to achieve required tolerance levels by providing accurate distance data, which the control unit then uses to calculate position correction values, overcoming the limitations of traditional robot positioning methods.
Solution Approach 2:
The patent replaces traditional mechanical positioning methods with an optical measurement system (laser scanning unit). Instead of relying solely on mechanical robot arm precision, the system uses optical laser measurement to detect distances with high precision, then uses this information to calculate correction values, substituting mechanical precision requirements with optical measurement capabilities.
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
Enables flexible and precise positioning of various components, regardless of their reference position, improving accuracy and allowing for dynamic adjustments, thereby reducing the risk of production errors and enhancing the connection of components through processes like 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
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AI summary
The invention relates to a method for positioning a first component relative to a second component using a robot arm system, comprising: providing at least one first robot arm configured to hold a first component and move it relative to a second component, the robot arm further being configured to be moved in a coordinate-based manner; providing at least one laser scanning unit configured to detect a distance between the first component and the second component; picking up the first component with 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 using the laser scanning unit; providing a position correction value based on the detected distance of the first component to the second component;Move at least one of the components to a final position based on the provided position correction value.