System and method for evaluating surface shape characteristics and measuring vibrations using spatial and temporal correlation in high-frequency displacement measurement using diffusely reflected light beams

A non-contact method using diffusely reflected light beams for measuring surface vibrations addresses the inaccuracy and invasiveness of piezoelectric sensors by calculating vertical displacement through triangulation, ensuring precise and interference-resistant vibration measurements.

JP2026521358APending Publication Date: 2026-06-30CONCURRENTDATA INC
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
CONCURRENTDATA INC
Filing Date
2024-05-22
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Conventional methods for measuring surface vibrations using piezoelectric sensors are invasive and affect the physical and acoustic behavior of the surface, leading to inaccurate and unreliable results.

Method used

A non-contact method using diffusely reflected light beams to measure surface vibrations by projecting light from one or more sources, detecting the changes in position of the reflected light, and calculating vertical displacement through triangulation, allowing for the determination of frequency and amplitude of surface disturbances.

Benefits of technology

Provides accurate and non-invasive measurement of surface vibrations without affecting the physical or acoustic behavior of the object, unaffected by high temperatures, electromagnetic interference, and enabling high-frequency displacement measurements.

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Abstract

This invention describes a non-contact method for measuring vibrations on the surface of an object. This method includes projecting light from one or more light sources toward a region of interest on the surface of the object; detecting light diffusely reflected from the surface of the object using one or more detectors; determining the change in position of the reflected light detected over time by the detectors; calculating a series of measurements of the vertical displacement of the surface over a period of time from the change in position of the reflected light at at least one point on the surface of the object using triangulation; and determining the frequency and amplitude of surface disturbance at at least one point on the surface using the series of measurements of vertical displacement.
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