Robot Imaging Calibration Using Tool Traces Without External Jigs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional calibration methods for imaging devices in robot systems rely on external calibration jigs, which can be cumbersome and require additional setup, limiting the precision and efficiency of distortion correction.
Innovation Solution
A robot system with a controller that performs calibration by arranging the robot's distal end at multiple positions, operating a tool to irradiate a low-intensity laser beam or perform other processes, capturing images, and comparing irradiation positions to predetermined reference positions to create correction data for lens distortion correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If external calibration jigs are used for imaging device calibration, then calibration can be performed, but the process becomes cumbersome and requires additional setup
Solution Approach 1:
The imaging device uses the workpiece itself as the calibration target instead of requiring external calibration jigs. The device irradiates light to the workpiece, captures the workpiece image, and performs calibration based on the captured image data, enabling self-calibration without additional equipment
Solution Approach 2:
The workpiece serves dual purposes: it is both the object to be processed and the calibration target. By using the workpiece itself for calibration, the system eliminates the need for separate calibration jigs and integrates the calibration function into the existing workpiece handling process
2Measurement precision
If external calibration jigs are used for distortion correction, then calibration can be performed, but additional setup time and equipment are required
Solution Approach 1:
The system performs calibration using the actual workpiece before the main processing operation. By capturing the workpiece image and performing distortion correction calculations in advance, the system prepares correction data that is specific to the workpiece geometry and imaging conditions
Solution Approach 2:
The workpiece serves as its own calibration target, eliminating the need for separate calibration jigs and setup procedures. The calibration process uses the workpiece's actual geometry and position to generate correction data, reducing both time and equipment requirements
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 method allows for accurate and efficient calibration of imaging devices within the robot system without the need for external calibration jigs, enabling precise correction of distortion and improving the accuracy of captured images.
Implementation Method 1
imaging processing which causes the imaging device to capture light irradiated to a predetermined object or a trace left on the predetermined object
Data Source
AI summary
This robot system includes a robot, a tool which is attached to the robot, an imaging device, and a controller which controls the robot and the tool, and the controller is configured so that a distal end portion of the robot is placed at a plurality of calibration positions, the tool is operated at each of the calibration positions, images of light irradiated to an object or a trace left on the object due to tool operation processing are captured by the imaging device, and calibration is performed based on comparison between irradiation positions of the light or positions of the traces, which are in an image captured by the imaging device, and predetermined reference positions.