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354 条记录 (耗时 0.045 秒)

    Diagnosis apparatus
    72.
    发明授权
    Diagnosis apparatus 有权

    公开(公告)号：US12044593B2

    公开(公告)日：2024-07-23

    申请号：US17844525

    申请日：2022-06-20

    申请人： SUMITOMO HEAVY INDUSTRIES, LTD.

    发明人： Tomoko Ichikawa ,  Yutaka Akedo

    IPC分类号： G01M13/021 ,  G01H1/12 ,  G01H17/00 ,  G01M13/028 ,  G05B23/02

    CPC分类号： G01M13/021 ,  G01H17/00 ,  G05B23/02

    摘要： A diagnosis apparatus includes: a sensor that detects diagnosis target information generated by a diagnosis target device; a threshold setting unit that sets a threshold for the diagnosis target information; and a diagnosis unit that diagnoses the diagnosis target device based on the diagnosis target information detected by the sensor and the threshold, in which the threshold setting unit sets the threshold based on the diagnosis target information in a predetermined period before a diagnosis time point, and the diagnosis unit performs diagnosis based on a current time point threshold set at the diagnosis time point and at least one past threshold set in the past.

    Unusual-noise determination device for vehicle
    74.
    发明授权
    Unusual-noise determination device for vehicle 有权

    公开(公告)号：US12014585B2

    公开(公告)日：2024-06-18

    申请号：US17490811

    申请日：2021-09-30

    申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

    发明人： Atsushi Tabata ,  Ken Imamura ,  Koichi Okuda ,  Masato Nakano ,  Toshiaki Tamachi

    IPC分类号： G07C5/08 ,  G01M13/028

    CPC分类号： G07C5/0808 ,  G01M13/028 ,  G07C5/085

    摘要： An unusual-noise determination device for a vehicle that performs unusual-noise determination to determine whether a power transmission system of the vehicle is generating unusual noise. The unusual-noise determination device includes an execution device and a memory device. The memory device stores a neural network that uses the maximum sound pressure and the excess ratio as inputs, and outputs a determination result variable, which is a variable indicating a result of the unusual-noise determination. The neural network is a trained neural network that has been trained using various values related to each of multiple vehicles as training data. The execution device is configured to perform the unusual-noise determination based on an output of the trained neural network that uses, as inputs, the maximum sound pressure and the excess ratio.

    STATE MONITORING DEVICE AND STATE MONITORING METHOD FOR BALL SCREW
    75.
    发明公开
    STATE MONITORING DEVICE AND STATE MONITORING METHOD FOR BALL SCREW 审中-公开

    公开(公告)号：US20240183750A1

    公开(公告)日：2024-06-06

    申请号：US18285688

    申请日：2021-04-13

    申请人： NSK LTD.

    发明人： Keisuke MATSUMURA ,  Satoshi HASHIMOTO ,  Yuki YAMADA

    IPC分类号： G01M13/028 ,  F16H25/22

    CPC分类号： G01M13/028 ,  F16H25/2214

    摘要： Disclosed are a state monitoring device and a state monitoring method for a ball screw, which enable appropriate collection of data to accurately diagnose the state of the ball screw. The state monitoring device monitors the state of the ball screw having a screw shaft, a nut, and a plurality of balls. The state monitoring device includes a drive control unit for controlling a drive unit (servo motor) to cause the screw shaft and the nut to move relative to each other at a constant speed for one or more reciprocating motions under an unloaded condition, and a data collection unit for collecting, as data, physical quantities related to the ball screw while the drive unit is controlled by the drive control unit.

    Robust Fault Frequency Component Extraction of Motor Under Varying Operating Conditions
    76.
    发明公开
    Robust Fault Frequency Component Extraction of Motor Under Varying Operating Conditions 审中-公开

    公开(公告)号：US20240175923A1

    公开(公告)日：2024-05-30

    申请号：US18058406

    申请日：2022-11-23

    申请人： Mitsubishi Electric Research Laboratories, Inc.

    发明人： Dehong Liu

    IPC分类号： G01R31/34 ,  G01M13/028

    CPC分类号： G01R31/343 ,  G01M13/028

    摘要： A fault detection system of extracting fault signature of a motor operating at varying speed or varying load conditions is provided. The fault detection system includes a sensor interface configured to acquire sensor signals from sensors arranged at predetermined positions of the induction machine, wherein the sensor signals are indicative of an eccentricity level of a rotor of the induction machine, a memory coupled with a processor. The instructions include steps a sensor interface configured to acquire operation signals of the induction machine; a memory configured to store a computer-implemented fault detection method by extracting fault signals in the frequency domain from the frequency spectrum formed by a minimum variance beam-forming method.

    Method for identifying a change in the operating behavior of a crankshaft drive of a motor vehicle
    79.
    发明授权
    Method for identifying a change in the operating behavior of a crankshaft drive of a motor vehicle 有权

    公开(公告)号：US11988548B2

    公开(公告)日：2024-05-21

    申请号：US17264696

    申请日：2019-07-25

    申请人： MAN Truck & Bus SE

    发明人： Christopher Schmidt ,  Roman Suchanek

    IPC分类号： G01H11/02 ,  F02D41/22 ,  F16F15/10 ,  G01M13/028 ,  G01M15/04 ,  G01M15/12 ,  F02D41/00 ,  G01M13/021

    CPC分类号： G01H11/02 ,  F16F15/10 ,  G01M13/028 ,  G01M15/046 ,  G01M15/12 ,  F02D41/009 ,  F02D41/22 ,  G01M13/021

    摘要： The disclosure relates to a method for identifying a change in the operating behavior of a crankshaft drive of a motor vehicle. In particular, the disclosure relates to a method for identifying error states of a torsional-vibration damper in the crankshaft drive, such as a jamming or slipping of a secondary mass of the torsional-vibration damper. The crankshaft drive comprises a crankshaft, a pulse generator that rotates when the crankshaft is in operation and a fixed sensor device, which generates a rotational speed signal N as a function of the rotational speed of the pulse generator. The method comprises the following steps: detecting a current rotational speed signal Nakt of the sensor device during operation of the crankshaft drive; filtering the current rotational speed signal Nakt using a bandpass filter that has at least one first passband range D1 comprising a first center frequency f1; comparing the filtered current rotational speed signal Nakt with a reference signal Nref stored in a memory; and identifying a change in the operating behavior of the crankshaft drive on the basis of the comparison of the filtered current rotational speed signal Nakt with the reference signal Nref. The disclosure further relates to a vehicle, such as a commercial vehicle, having a control device which is configured to perform a method of this kind.