Optical displacement measurement system, processing device and optical displacement meter

CN115046492BActive Publication Date: 2026-05-26KEYENCE CORP

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: KEYENCE CORP
Filing Date: 2022-03-01
Publication Date: 2026-05-26

AI Technical Summary

Technical Problem

Existing optical displacement meters are prone to camera misalignment when measuring the shape of an object, resulting in distorted measurement results. Furthermore, the attachment process is complex and makes it difficult to quickly and accurately generate a precise three-dimensional shape.

Method used

By defining the first, second, and third intersecting directions in the light projection unit and the light receiving unit, measurements are taken using slit light or point light, and combined with sphere information calculation, distortion calculation, and correction value calculation, three-dimensional data is generated, rotation and translation misalignment is automatically corrected, and an accurate three-dimensional shape is automatically generated.

Benefits of technology

Even when the camera is out of alignment, it can automatically generate an accurate three-dimensional shape of the workpiece, simplifying the attachment process and improving the accuracy and efficiency of measurement.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention provides an optical displacement measurement system, a processing device, and an optical displacement meter. A shape generation unit generates three-dimensional data of an adjustable workpiece by synthesizing multiple contour data, which are generated corresponding to various positions in the Y1 direction due to the relative movement of the adjustable workpiece, which has a spherical surface, in the movement direction A of a camera unit corresponding to the Y1 direction. A sphere information calculation unit calculates parameters of the sphere defined by multiple points included in the three-dimensional data. A distortion calculation unit calculates the distortion of the sphere based on these parameters. A correction value calculation unit calculates at least one of a first rotation angle correction value about the X2 axis and a second rotation angle correction value about the Z2 axis from the multiple contour data constituting the three-dimensional data to reduce the distortion.

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