公开(公告)号：US11619669B2

公开(公告)日：2023-04-04

申请号：US16480285

申请日：2018-01-25

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Shin Tabuchi ,  Satoshi Kanai ,  Hiromichi Nishiyama

IPC: F03D9/12 ,  F03D17/00 ,  G01R31/72 ,  G01R31/34 ,  F03D80/80

Abstract: The condition monitoring system includes an acquisition unit and a generation unit. The acquisition unit acquires waveform data from a measuring device to measure an electrical signal that is either output or input of a converter. The waveform data represents a waveform of the electrical signal. The generation unit generates, based on the waveform data, analysis data to monitor the condition concerning the converter. The generation unit obtains, by frequency analysis, a plurality of combinations, each including a value of a frequency and a value of a feature quantity that is either intensity or phase, based on the waveform data when a value of the drive frequency varies and thereby generate the analysis data having at least three variables including the frequency, the feature quantity, and the drive frequency.

公开(公告)号：US11204388B2

公开(公告)日：2021-12-21

申请号：US16300011

申请日：2017-05-02

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shin Tabuchi ,  Satoshi Kanai

IPC: G01R31/34 ,  F03D17/00 ,  H02P9/04 ,  G06Q50/06

Abstract: A power generation equipment monitoring system includes a receiver and a determining processor. The receiver acquires, from a measuring device that measures output currents of power generation equipment that converts rotational energy of a rotor thereof into electric energy to output AC voltage with a reference frequency, waveform data representing waveform of the output currents. The determining processor determines presence and absence of a malfunction in a rotary block that applies motive power to the rotor of the power generation equipment, according to the waveform data acquired through the receiver. The determining processor determines the presence and absence of the malfunction based on a component of at least one specific frequency arranged at one or more intervals according to a rotational speed of the rotor from the reference frequency on a frequency axis in a frequency spectrum of the output currents.

公开(公告)号：US10578741B2

公开(公告)日：2020-03-03

申请号：US15518807

申请日：2015-10-29

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomohiro Matsuo ,  Yoshinobu Kouno ,  Shin Tabuchi

IPC: G01S17/89 ,  G01S7/486 ,  G01S17/10 ,  H04N5/265 ,  H04N5/335

Abstract: A distance detection device generates a distance image indicating a distance to an object positioned within a distance range targeted for measurement using a TOF system. The distance detection device includes a light source that illuminates the object with light, a light sensor that generates a detection signal by receiving a reflection light which is the illumination light reflected from the object, a controller that controls an exposure timing of the light sensor with respect to an illumination timing of the light from the light source in each of measurement ranges of a plurality of measurement ranges obtained by dividing the distance range, and a processor. The processor generates distance information by calculating distances to objects within the measurement ranges based on the detection signal in each of the measurement ranges, and generates the distance image indicating the distance to the object within the distance range targeted for measurement using the generated plural distance information items.