Visual Sensor 3D Positioning With Focus-Based Parameter Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing imaging devices struggle to accurately calculate three-dimensional positions of target objects due to changes in focus position and relative positioning between the camera and the object, which can lead to blurred images and limited robot movement, especially when dealing with individual differences and displacements of target objects.
Innovation Solution
An imaging device equipped with a vision sensor, focus position detecting unit, parameter setting unit, and feature detecting unit that adjusts parameters based on the focus position to accurately calculate three-dimensional positions, allowing for flexible focusing and improved robot operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the camera focuses on a predetermined position, then the image can be captured clearly at that position, but the camera cannot focus on other positions and the three-dimensional position calculation becomes inaccurate when the target object is displaced
Solution Approach 1:
The patent makes the focus position dynamic by detecting it automatically and using it to select appropriate parameters for three-dimensional position calculation. Instead of fixing the focus position, the system adapts to whatever focus position the camera is currently set to, thereby resolving the contradiction between measurement precision at a fixed position and adaptability to various positions.
Solution Approach 2:
The patent changes the parameters used in three-dimensional position calculation based on the detected focus position. By storing multiple sets of parameters corresponding to different focus positions and selecting the appropriate set, the system maintains calculation accuracy regardless of the focus position, thus resolving the contradiction between precision and adaptability.
2Measurement precision
If the parameters are determined for one focus position, then the three-dimensional position can be calculated accurately at that position, but it is not possible to focus on other positions or calculate positions accurately when focused elsewhere
Solution Approach 1:
The patent prepares multiple sets of parameters in advance, each corresponding to a different focus position. This preliminary preparation allows the system to quickly switch between different focus positions without requiring recalculation or complex adjustments, thereby maintaining both precision and operational ease.
Solution Approach 2:
The system uses feedback from the detected focus position to automatically select the appropriate parameter set. This closed-loop approach ensures that the correct parameters are always used regardless of the focus position, eliminating the need for manual parameter adjustment and maintaining both precision and ease of operation.
3Stability of the object's composition
If the relative position of the camera with respect to the workpiece is aligned with a predetermined position, then the focus can be kept constant, but the robot may interfere with obstacles or the stroke may be limited when the workpiece position changes
Solution Approach 1:
The patent makes the system dynamic by allowing the robot to move freely while the focus position is detected and used to adjust the calculation parameters. This eliminates the need for strict alignment between the camera and workpiece, thereby expanding the robot's movement range while maintaining focus stability through parameter adaptation.
Solution Approach 2:
The system changes the calculation parameters based on the detected focus position, allowing the robot to operate in various positions without requiring precise alignment. This parameter adaptation maintains measurement accuracy while significantly increasing the robot's operational flexibility and range of motion.
Data Source
AI summary
This imaging device comprises a focus position detection unit for detecting a focus position when a visual sensor is in focus. The imaging device comprises a parameter setting unit for setting a parameter for calculating a three-dimensional position corresponding to a specific position in an image captured by the visual sensor. The imaging device comprises a characteristic position calculation unit for calculating the three-dimensional position of a characteristic portion using the parameter set by the parameter setting unit. The parameter setting unit sets the parameter on the basis of the focus position.