STRUCTURE EVALUATION SYSTEM, STRUCTURE EVALUATION APPARATUS, AND STRUCTURE EVALUATION METHOD

• US 20180074023A1
• Filed: 03/09/2017
• Published: 03/15/2018
• Est. Priority Date: 09/15/2016
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: IIDA, Sanae, USUI, Takashi
• Granted Patent: US 10,458,954 B2
• Time in Patent Office: Days
• CPC Class Codes: G01M 5/0008 of bridges
• CPC Class Codes: G01M 5/0066 by exciting or detecting vibration or acceleration vibration testing of structures G01M7/00
• CPC Class Codes: G01N 2291/011 Velocity or travel time
• CPC Class Codes: G01N 2291/0258 Structural degradation, e.g. fatigue of composites, ageing of oils
• CPC Class Codes: G01N 29/0672 by acoustic tomography medical tomography A61B8/13
• CPC Class Codes: G01N 29/07 by measuring propagation velocity or propagation time of acoustic waves
• CPC Class Codes: G01N 29/14 using acoustic emission techniques echo of particles G01N29/046; measuring mechanical vibrations or acoustic waves in solids in general G01H1/00
• CPC Class Codes: G01N 29/4445 Classification of defects

Abstract

According to an embodiment, a structure evaluation system has a plurality of sensors, a signal processor, and an evaluator. The sensors detect an elastic wave generated from a structure. The signal processor acquires a reliability from a source of the elastic wave to the plurality of sensors by performing signal processing on the elastic wave detected by the plurality of sensors. The evaluator evaluates the soundness of the structure on the basis of the acquired reliability.

Claims

1. A structure evaluation system comprising:

a plurality of sensors configured to detect an elastic wave generated from a structure;

a signal processor configured to acquire a reliability of the elastic wave on the basis of the elastic wave detected by the plurality of sensors; and

an evaluator configured to evaluate soundness of the structure on the basis of the acquired reliability.

2. The structure evaluation system according to claim 1, wherein the evaluator divides an evaluation region of the structure to be evaluated for soundness into a plurality of regions and assigns a value according to the reliability to each of the divided regions to generate a reliability map indicating soundness of the evaluation region.

3. The structure evaluation system according to claim 2, wherein, when a first reliability map is newly created, the evaluator updates a second reliability map using the second reliability maps of the same evaluation region created prior to creating the first reliability map.

4. The structure evaluation system according to claim 1, wherein the evaluator locates a velocity of the elastic wave on the basis of an arrival time of the elastic wave and generates a velocity field map indicating a relationship between the velocity and the reliability in the evaluation region of the structure using the velocity and the reliability map.

5. The structure evaluation system according to claim 4, wherein the evaluator generates the velocity field map so that the velocity is higher on the velocity field map with as a reliability is higher on the reliability map and is lower on the velocity field map with a reliability is lower on the reliability map.

6. The structure evaluation system according to claim 1, wherein the reliability is a value indicating a degree of unexpectedness of the latest data with respect to past statistical data.

7. The structure evaluation system according to claim 1, further comprising a selector configured to select data of an elastic wave to be used in the evaluation according to the reliability,

wherein the evaluator uses data and evaluates the soundness of the structure.

8. A structure evaluation apparatus comprising:

an evaluator configured to evaluate soundness of the structure on the basis of the reliability of the elastic wave, wherein the reliability is acquired based on the elastic wave generated from the structure.

9. A structure evaluation method comprising:

a signal processing step of deriving a reliability of the elastic wave on the basis of the elastic wave detected by the plurality of sensor and

an evaluating step of deriving soundness of the structure on the basis of the reliability acquired.