Laser measurement target block, and laser measurement method using the target block.

The laser measurement target block with intersecting inclined planes facilitates precise workpiece shape and orientation measurement by leveraging diffuse reflection, addressing measurement inaccuracies in existing sensors.

JP2026090852APending Publication Date: 2026-06-03IHI CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
IHI CORP
Filing Date
2024-11-22
Publication Date
2026-06-03

AI Technical Summary

Technical Problem

Existing reflective optical displacement sensors using laser light struggle to accurately measure continuous surfaces due to difficulties in identifying the measurement point, especially when using general-purpose gauge blocks, leading to inaccurate measurements and limited measurable ranges.

Method used

A laser measurement target block with specific geometric configurations, including intersecting inclined planes and a vertex, designed for diffuse reflection, is attached to the workpiece, allowing precise measurement using a reflective optical displacement meter.

Benefits of technology

Enables highly accurate and efficient measurement of workpiece shape and orientation by identifying key reference points, overcoming limitations of specular reflection and improving measurement accuracy and range.

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Abstract

This invention provides a laser measurement target block that enables highly accurate measurements when used in conjunction with a reflective optical displacement meter that utilizes laser light. [Solution] The laser measurement target block (1) is attached to the workpiece to be measured. The target block (1) comprises a pair of first inclined planes (P1) and second inclined planes (P2) that intersect along the intersection line (L1) forming an interior angle (θ), and a third plane (P3) that intersects with the first inclined plane (P1) and the second inclined plane (P2). The third plane (P3) intersects the intersection line (L1) at a vertex (V1) on the intersection line (L1). The interior angle (θ) is between 100 degrees and 140 degrees.
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