公开(公告)号：EP4343475A1

公开(公告)日：2024-03-27

申请号：EP22197076.7

申请日：2022-09-22

申请人： Hitachi, Ltd.

发明人： KATO, Tetsuji ,  YAMASHITA, Tomoaki ,  KILSBY, Paul

IPC分类号： G05B23/02

摘要： The invention provides a monitoring device 1 for monitoring operating components of a system 100, which comprises a probability data device 10, configured to determine probability data for at least one operating component 110 of the system 100, which describes a probability distribution of error-free operation of said component 110 in dependence of a monitoring variable of said component 110, wherein the probability data device 10 is configured to calculate probability data from training data of said component 110 and further to perform a correction step in case the calculated probability data has a dispersion value equal to zero, wherein a correction factor is applied to the calculated probability data such that the determined probability data has a dispersion value greater than zero, a receiving device 20, configured to receive a value of the monitoring variable of said component 110 from a measuring device 111 connected to said component 110, a diagnosis device 30, configured to determine a state parameter for said component 110 in dependence of the received value of the monitoring variable and the determined probability data, and an output device 40, configured to output an output signal corresponding to the determined state parameter.

公开(公告)号：EP4404468A1

公开(公告)日：2024-07-24

申请号：EP23152658.3

申请日：2023-01-20

申请人： Hitachi, Ltd.

发明人： KATO, Tetsuji ,  KILSBY, Paul ,  INOUE, Takeshi

IPC分类号： H03M7/30

CPC分类号： H03M7/6029 ,  H03M7/3073

摘要： The present disclosure relates to an apparatus for compressing time series data comprising: a difference detection unit 30 configured to determine difference data from reference data and measurement data, a data compression unit 40 configured to compress the difference data determined by the difference detection unit 30, a data export 50 unit configured to provide the compressed difference data to a data storage device.

公开(公告)号：EP4235197A1

公开(公告)日：2023-08-30

申请号：EP22158578.9

申请日：2022-02-24

申请人： Hitachi, Ltd.

发明人： KATO, Tetsuji ,  YAMASHITA, Tomoaki ,  KILSBY, Paul ,  UEMURA, Takuya ,  ENOKIDA, Kouichi ,  HAYASHI, Gousuke ,  DEGUCHI, Kenta

IPC分类号： G01R31/34 ,  G01R23/18

摘要： Method for determining the slip of a machine which comprises the steps of: receiving a measurement signal, wherein the measurement signal includes a set of measurement values of an operational parameter of the machine; determining the frequency spectrum of the measurement signal by converting the measurement signal into the frequency domain; determining whether the frequency spectrum includes at least two peaks in the frequency spectrum for which different types of failure mode calculations return the same slip value; wherein, if in the determining step it is found that two peaks exist in the frequency spectrum which return the same slip value, said value is determined to be the slip value of the machine.