Structural deformation detecting device

Patent metadata

Field	Value
Publication number	US-2016202216-A1
Application number	US-201614989856-A
Country	US
Kind code	A1
Filing date	Jan 7, 2016
Priority date	Jan 14, 2015
Publication date	Jul 14, 2016
Grant date	—

Abstract

A structural deformation detecting device comprises a vibration section provided with a plurality of vibrators for vibrating a structure serving as a measured object in a non-contact manner, a vibration measurement section configured to detect the vibration generated in the measured object at any measurement position in a non-contact manner, a housing on which the vibration section and the vibration measurement section are arranged at a specific interval, a time measurement section configured to measure the time elapsing till the vibration of the measured object caused by an optional vibrator is detected by the first vibration measurement section at a specific position, and a deformation determination section configured to determine whether or not there is a deformation by comparing the time taken for the transmission of vibration from the vibration position to the measurement position in a deformation-free state with the time measured by the time measurement section.

First claim

What is claimed is:

1 . A structural deformation detecting device, comprising:
a vibration section configure to include a plurality of vibrators for vibrating a structure serving as a measured object in a non-contact manner; a vibration measurement section configured to detect, in a non-contact manner, the vibration generated in the measured object at any measurement position; a housing on which the vibration section and the vibration measurement section are arranged at a specific interval; a time measurement section configured to measure the time elapsing till the vibration of the measured object caused by an optional vibrator is detected by the vibration measurement section at a specific position; and a deformation determination section configured to determine whether or not there is a deformation by comparing the time taken for the transmission of vibration from the vibration position to the measurement position in a deformation-free state with the time measured by the time measurement section.

2 . The structural deformation detecting device according to claim 1 , wherein
the plurality of vibrators constituting the vibration section are arranged into a matrix.

3 . The structural deformation detecting device according to claim 1 , wherein
the vibration measurement section can set a measurement position optionally on the measured surface of the measured object.

4 . The structural deformation detecting device according to claim 2 , wherein
the vibration measurement section can set a measurement position optionally on the measured surface of the measured object.

5 . The structural deformation detecting device according to claim 1 , wherein
the vibrator refers to a parametric speaker.

6 . The structural deformation detecting device according to claim 1 , wherein
the vibration measurement section refers to a two-dimensional laser Doppler vibrometer.

Assignees

• Toshiba Tec Kk

Inventors

• Komiya Kenichi
• Ishikawa Daisuke

Classifications

• G01N2291/048

  Transmission, i.e. analysed material between transmitter and receiver · CPC title

• G01N29/2418 Primary

  using optoacoustic interaction with the material, e.g. laser radiation, photoacoustics (photoacoustic cells G01N21/1702; measuring characteristics of vibrations by using radiation-sensitive means G01H9/00; acousto-optical conversion techniques for short-range imaging G01S15/8965; sound-producing devices using laser bundle G10K15/046) · CPC title

• G01N2291/0289

  Internal structure, e.g. defects, grain size, texture · CPC title

• G01N29/07

  by measuring propagation velocity or propagation time of acoustic waves · CPC title

• G01N2291/023

  Solids · CPC title