Linear Motion Accuracy Measurement Using Interference Fringe Jig
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Solution Overview
Problem
The existing measuring jigs for assessing the operation accuracy of linear motion mechanisms in cutting apparatuses are time-consuming and cannot measure rolling accuracy effectively.
Innovation Solution
A measuring jig with a flat lower surface, a parallel surface opposite and parallel to the lower surface, and a slanted surface joined through a straight boundary line, used in conjunction with a white light interferometer to capture interference fringes and deduce operation accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the measuring jig is manually repositioned to measure different parameters (pitching, yawing), then measurement flexibility is achieved, but measurement time increases significantly
Solution Approach 1:
The measuring jig is designed with multiple surfaces (first surface, second surface, third surface, fourth surface) that can each serve as measurement surfaces for different parameters. By rotating the jig to different predetermined orientations, a single jig structure can measure pitching, yawing, and rolling parameters without requiring multiple separate jigs or complex reconfiguration, thus achieving multi-functionality while reducing setup time
Solution Approach 2:
The measuring jig incorporates rotational capability that allows it to dynamically change its orientation during the measurement process. The jig can be rotated to predetermined orientations to present different surfaces to the laser interferometer for measuring different parameters, enabling adaptive measurement without manual repositioning and reducing measurement time
2Ease of manufacture
If the measuring jig uses traditional flat surfaces only, then manufacturing is simple, but rolling accuracy cannot be measured
Solution Approach 1:
The measuring jig incorporates different surface types in specific locations: flat surfaces (first and second surfaces) for measuring pitching and yawing parameters, and slanted surfaces (third and fourth surfaces) for measuring rolling parameter. Each surface is optimized for its specific measurement function, allowing the jig to measure all three parameters while maintaining relatively simple manufacturing for each individual surface
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 rapid and accurate measurement of operation accuracy, including yawing, pitching, and rolling, by observing changes in interference fringes, thus improving measurement efficiency and accuracy.
Implementation Method 1
the white light interferometer captures images of the parallel surface and the slanted surface of the measuring jig and observes changes in interference fringes appearing in image sections of the captured images
Data Source
AI summary
An operation accuracy measuring method for measuring the operation accuracy of a linear motion mechanism includes the steps of placing on a support table a measuring jig having a flat lower surface, a parallel surface opposite and parallel to the lower surface, and a slanted surface joined to the parallel surface through a straight boundary line, adjusting the position of the measuring jig to allow the white light interferometer to observe the parallel surface and the slanted surface simultaneously, capturing images of the parallel surface and the slanted surface with the white light interferometer and observing changes in interference fringes appearing in image sections of the captured images that represent the parallel surface and the slanted surface while the support table is being linearly moved, and the step of deducing the operation accuracy of the linear motion mechanism on the basis of the observed changes in the interference fringes.