公开(公告)号：US11422527B2

公开(公告)日：2022-08-23

申请号：US16825551

申请日：2020-03-20

Applicant: Hitachi, Ltd.

Inventor： Reiso Sasaki ,  Kazuo Ono ,  Takuma Nishimura

IPC: G06F8/658 ,  G06F9/44 ,  G06F9/445 ,  G06F9/455 ,  G05B19/406 ,  G06N3/08

Abstract: A wireless endpoint provided in an automatic inspection system includes a sound collection unit that collects sounds produced by an inspection target, an analysis unit that analyzes the collected sound and obtains a degree of difference between the collected sound and a normal sound learned in advance as an analysis result, a wireless communication unit that wirelessly transmits data including the analysis result to a wireless base station, and a power supply unit that supplies power to the above units. The wireless base station manages the data received from the wireless endpoint. In response to a request from a monitoring terminal that monitors the status of the inspection target, the wireless base station transmits the analysis result retrieved from the data to the monitoring terminal. The monitoring terminal performs a process of disclosing a status of the inspection target determined from the analysis result.

公开(公告)号：US11088652B2

公开(公告)日：2021-08-10

申请号：US16596807

申请日：2019-10-09

Applicant: Hitachi, Ltd.

Inventor： Kazuo Ono ,  Reiso Sasaki ,  Takuma Nishimura

IPC: G01R31/00 ,  H02P29/50 ,  G01M1/22 ,  G01R19/25 ,  G01R23/167 ,  G01R19/00 ,  H02P29/024

Abstract: A current detector and a detection unit are provided. The current detector is connected to at least one of drive current lines of a rotary machine. The detection unit performs an orthogonal detection on a main frequency detected by the current detector, and extracts a magnitude of a sideband wave. Then, a state of the rotary machine is diagnosed from the magnitude of the extracted sideband wave.

公开(公告)号：US11373673B2

公开(公告)日：2022-06-28

申请号：US16972763

申请日：2019-03-01

Applicant: Hitachi, Ltd.

Inventor： Reiso Sasaki ,  Takuma Nishimura ,  Takahiro Yamada ,  Tsukasa Fujimori

IPC: G10L25/51 ,  G01H17/00 ,  G01M99/00 ,  G05B23/02 ,  G08B3/10 ,  G10L25/72 ,  H04R1/08 ,  H04R3/00 ,  G01H3/06 ,  G01H3/12 ,  G01M5/00 ,  G08B1/08 ,  H04R29/00

Abstract: A sound inspection system that can reduce power consumption is provided. A sound inspection system 1 that determines a state based on a sound of an inspection target object 2 includes a sound sensor device 10 that collects the sound of the inspection target object 2, analyzes the collected sound, and transmits an analysis result, and a sound data determination device 30 that determines a state of the inspection target object based on the analysis result from the sound sensor device. The sound sensor device transmits, as the analysis result, intensities of the collected sound for each predetermined frequency set in advance.