公开(公告)号：US12038349B2

公开(公告)日：2024-07-16

申请号：US17463035

申请日：2021-08-31

Applicant: Kabushiki Kaisha Toshiba

Inventor： Takashi Usui ,  Toshiki Takayasu ,  Kazuo Watabe ,  Atsuro Oonishi ,  Hiroshi Takahashi ,  Takamitsu Sunaoshi

IPC: G01M17/10

CPC classification number: G01M17/10

Abstract: According to one embodiment, an inspection system of an embodiment is an inspection system for inspecting a bogie including a plurality of side beams extending in a front-rear direction and disposed apart from each other in a left-right direction and a cross beam connecting the plurality of side beams. The inspection system includes one or more sensors and a position locator. The one or more sensors are installed on at least one of the plurality of side beams and the cross beam and detect elastic waves. The position locator identifies a beam in which the elastic waves have been generated or locates a position of an elastic wave source on the basis of the elastic waves detected by the one or more sensors.

公开(公告)号：US11754530B2

公开(公告)日：2023-09-12

申请号：US17184134

申请日：2021-02-24

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Hidefumi Takamine ,  Yuki Ueda ,  Keisuke Ueno ,  Takashi Usui ,  Kazuo Watabe

IPC: G01N29/07

CPC classification number: G01N29/07 ,  G01N2291/0289 ,  G01N2291/2698

Abstract: According to one embodiment, a structure evaluation system includes a wave guide, a first sensor, a second sensor, and a calculation part. The wave guide is formed in a rod shape, is inserted into a hole that is formed at a predetermined depth from a surface of a measurement target, and has one end fixed to a deepest portion of the hole. The first sensor is provided at the other end of the wave guide at a position that is substantially the same as the surface. The second sensor is provided on the surface of the measurement target. The calculation part estimates a depth of damage occurring in the measurement target from the surface on the basis of a first detection value of an elastic wave transmitted to the measurement target which is detected by the first sensor through the wave guide and a second detection value obtained by an elastic wave which is detected by the second sensor.

公开(公告)号：US11513102B2

公开(公告)日：2022-11-29

申请号：US17018390

申请日：2020-09-11

Applicant: The University of Tokyo ,  KABUSHIKI KAISHA TOSHIBA

Inventor： Isao Shimoyama ,  Thanh-Vinh Nguyen ,  Minh Dung Nguyen ,  Takahiro Omori ,  Kazuo Watabe

IPC: G01N29/24 ,  G01N29/14

Abstract: According to one embodiment, a sensor includes a first structure body, a second structure body, and a detector. The first structure body includes a supporter, a deformable part supported by a first portion of the supporter, and a membrane part. At least a portion of the membrane part is connected to the deformable part and a second portion of the supporter. The second structure body is connected to the first structure body. A liquid is provided between the first structure body and the second structure body. The detector outputs a signal corresponding to a deformation of the deformable part.

公开(公告)号：US20220146457A1

公开(公告)日：2022-05-12

申请号：US17459627

申请日：2021-08-27

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Takashi Usui ,  Kazuo Watabe

IPC: G01N29/14 ,  G01N29/44

Abstract: A measuring method in an embodiment includes detecting elastic waves generated in a structural object formed of a solid material in a non-contact manner and estimating a position of an occurrence source of the elastic waves on the basis of information regarding an intensity of a signal of the detected elastic waves.

公开(公告)号：US11041830B2

公开(公告)日：2021-06-22

申请号：US16286764

申请日：2019-02-27

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Tomoya Fumikura ,  Takahiro Omori ,  Kazuo Watabe

IPC: G01N29/04 ,  G01N29/07 ,  G01N29/44 ,  G01N29/14

Abstract: According to one embodiment, a detection system of an embodiment includes a sensor configured to detect elastic waves and a determiner. The determiner determines a region where an elastic wave generation source is positioned on the basis of waveform information if the waveform information including a plurality of peak groups related to one elastic wave is included in a detection result of the sensor.

公开(公告)号：US20200292505A1

公开(公告)日：2020-09-17

申请号：US16556286

申请日：2019-08-30

Applicant: Kabushiki Kaisha Toshiba

Inventor： Yongfang Li ,  Takahiro Omori ,  Takashi Usui ,  Osamu Nishimura ,  Kazuo Watabe

IPC: G01N29/42 ,  G01M13/028 ,  G01H11/08 ,  G01N29/12

Abstract: According to one embodiment, a sensor module includes a sensor and a diagnosis circuit. The sensor includes piezoelectric transducers and switches. The piezoelectric transducers have different resonance frequencies. The switches are provided to correspond to the piezoelectric transducers, respectively. Each of the switches outputs an output signal corresponding to a voltage generated by an inverse piezoelectric effect of a corresponding piezoelectric transducer of the piezoelectric transducers. The diagnosis circuit diagnoses, based on a difference in pattern of the output signal, whether vibration has newly occurred in the sensor, and switch an output destination of the output signal of the sensor according to a result of the diagnosis.

公开(公告)号：US20190383696A1

公开(公告)日：2019-12-19

申请号：US16551857

申请日：2019-08-27

Applicant: Kabushiki Kaisha Toshiba ,  Kyoto University

Inventor： Tomoki Shiotani ,  Katsufumi Hashimoto ,  Hidefumi Takamine ,  Kazuo Watabe

IPC: G01M5/00

Abstract: According to one embodiment, a structure evaluation system according to an embodiment includes a plurality of sensors, a position locator, and an evaluator. The plurality of sensors detect elastic waves. The position locator locates positions of elastic wave sources by using the elastic waves among the plurality of elastic waves respectively detected by the plurality of sensors having an amplitude exceeding a threshold value determined according to positions of the sources of the plurality of elastic waves and the positions of the plurality of disposed sensors. The evaluator evaluates a deteriorated state of the structure on the basis of results of the position locating of the elastic wave sources which is performed by the position locator.

公开(公告)号：US10444197B2

公开(公告)日：2019-10-15

申请号：US16163706

申请日：2018-10-18

Applicant: Kabushiki Kaisha Toshiba

Inventor： Takashi Usui ,  Kazuo Watabe

IPC: G01N29/32 ,  G01N29/44 ,  G01N29/14

Abstract: According to an embodiment, a detection system includes a plurality of first sensors, a second sensor, a first calculator, and a second calculator. Each of the first sensors is configured to detect an elastic wave generated from a structure, and convert the elastic wave into a detection signal. The second sensor is configured to detect a noise propagating from surroundings, and convert the noise into a reference signal. The first calculator is configured to calculate a plurality of difference detection signals based on the respective detection signals and the reference signal. The second calculator is configured to calculate a position of a generation source of the elastic wave from the plurality of difference detection signals.

公开(公告)号：US10371666B2

公开(公告)日：2019-08-06

申请号：US15456075

申请日：2017-03-10

Applicant: KABUSHIKI KAISHA TOSHIBA ,  Kyoto University

Inventor： Kazuo Watabe ,  Hidefumi Takamine ,  Tomoki Shiotani

IPC: G01M5/00 ,  G01N29/04 ,  G01N29/07 ,  G01N29/14 ,  G01N29/24 ,  G01N29/44

Abstract: According to an embodiment, a structure evaluation system includes a plurality of sensors, a position locator, a velocity calculator, and an evaluator. The sensors detect an elastic wave generated from a structure. The position locator derives a wave source distribution of the elastic waves generated from the structure, on the basis of the elastic waves. The velocity calculator derives a propagation velocity of the elastic wave generated from the structure, on the basis of the elastic waves. The evaluator evaluates the soundness of the structure on the basis of the wave source distribution and the propagation velocity of the elastic waves.

公开(公告)号：US20180372580A1

公开(公告)日：2018-12-27

申请号：US15918549

申请日：2018-03-12

Applicant: Kabushiki Kaisha Toshiba ,  Kyoto University

Inventor： Hidefumi TAKAMINE ,  Kazuo Watabe ,  Tomoki Shiotani ,  Takahiro Nishida

IPC: G01M5/00 ,  G01M7/08

Abstract: According to one embodiment, a structure evaluation system includes an impact imparting unit, a sensor, and a structure evaluation device. The impact imparting unit applies impacts to a structure. The impact imparting unit applies the impacts at a frequency equal to or less than a frequency determined in accordance with an intensity at which the impacts are imparted. The sensor detects elastic waves. The structure evaluation device evaluates a deterioration state of the structure on the basis of the detected elastic waves.