Measurement Jig Positioning Error Correction via Multi-Mark Imaging
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Solution Overview
Problem
Measurement devices face challenges in ensuring high accuracy and extending the service life of measurement jigs used for measuring operation accuracy, as they have a high manufacturing cost and limited number of service cycles.
Innovation Solution
A measurement device that includes a measurement camera, a measurement jig with multiple marks arranged within the camera's visual field, and an image processing system to calculate the actual position of the jig, thereby improving accuracy and extending the service life by supplementing image data with multiple marks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a measurement jig is used to measure operation accuracy with high precision, then measurement accuracy is improved, but the manufacturing cost increases and service life is limited
Solution Approach 1:
The measurement jig is segmented into multiple measurement marks (first, second, third marks) distributed across the visual field. This segmentation allows the system to use multiple reference points for calculation, improving measurement accuracy while distributing wear across multiple marks, thereby extending the overall service life of the measurement jig.
Solution Approach 2:
The patent uses multiple measurement marks that replicate the same functional characteristic (being imaged by the camera) within the visual field. This copying approach provides redundancy - if one mark becomes worn or damaged, other marks can still be used for measurement, thus extending service life while maintaining measurement accuracy through the collective data from multiple marks.
2Measurement precision
If multiple measurement marks are arranged within the camera visual field, then measurement accuracy is improved through supplementary image data, but device complexity increases
Solution Approach 1:
The measurement marks serve multiple functions: they provide reference points for position calculation, enable error measurement between actual and instructed positions, and can be used repeatedly throughout the service life of the measurement jig. The camera system also serves dual purposes by both imaging the measurement marks and providing the data foundation for accuracy verification.
Solution Approach 2:
The measurement system is self-sufficient in that the measurement marks are imaged directly by the measurement camera without requiring additional sensors or external measurement devices. The image processing section automatically calculates positions and errors from the captured images, eliminating the need for complex external measurement equipment and reducing overall system complexity.
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
The device enhances measurement accuracy and extends the service life of the measurement jig by accurately calculating the actual position using multiple marks, reducing the influence of imaging environment fluctuations and improving the reliability of the measurement process.
Implementation Method 1
a measurement camera 10 that has a predetermined camera visual field 11
Data Source
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AI summary
An object of the invention is to provide a measurement device that can improve measurement accuracy and increase the number of times of service of a measurement jig. The measurement device includes a movement control section that positions the measurement jig at an instructed position in the transfer direction, an imaging control section that images the positioned measurement jig by the measurement camera and acquires an image data, an image processing section that calculates an actual position of the measurement jig based on multiple measurement marks which are included in the image data, and an error measurement section that measures a positioning error in the transfer direction due to the driving device based on the instructed position and the actual position.