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公开(公告)号：US20190101103A1
公开(公告)日：2019-04-04
申请号：US16085878
申请日：2017-03-16
Applicant: NTN CORPORATION
Inventor： Takashi HASEBA , Yosuke SUZUKI , Toru TAKAHASHI
Abstract: A condition monitoring system includes a vibration sensor for measuring a vibration waveform of a bearing in a wind turbine generation apparatus and a data processor for diagnosing abnormality of the bearing. In the data processor, an evaluation value computing unit time-sequentially computes an evaluation value that characterizes an effective value of vibration waveform data output from the vibration sensor within a certain time. A diagnosis unit diagnoses abnormality of the bearing based on transition of temporal change of the evaluation value. The evaluation value computing unit computes the minimum value of the effective values of vibration waveform data within a certain time, as the evaluation value.
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公开(公告)号：US20180137962A1
公开(公告)日：2018-05-17
申请号：US15566547
申请日：2016-04-07
Applicant: NTN CORPORATION
Inventor： Toru TAKAHASHI , Shintarou UENO
CPC classification number: H01F13/003 , G01D5/2451 , H01F13/00 , H01F27/365
Abstract: A magnetizing device includes a magnetization yoke including a pair of magnetization heads confronting each other through a magnetic gap, an excitation coil wound around the magnetization yoke, and a magnetization power supply that supplies a magnetizing current to the excitation coil to generate magnetic flux between the magnetization heads. A magnetic shield is provided on the magnetization yoke. The magnetic shield is spaced apart from one of the magnetization heads with a gap being formed therebetween along a direction in which the plurality of magnetic encoder tracks are arranged. The magnetic shield blocks a flow of magnetic flux that is present outside a defined extension of a flow of the magnetic flux between the pair of magnetization heads. The magnetic shield is of such a geometry that a thickness thereof progressively decreases towards the one of the magnetization heads.
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公开(公告)号：US20160250899A1
公开(公告)日：2016-09-01
申请号：US15151000
申请日：2016-05-10
Applicant: NTN CORPORATION
Inventor： Toru TAKAHASHI , Kentaro NISHIKAWA , Nobuo MASAKI , Yasumichi WAKAO
CPC classification number: B60C11/246 , B60C11/24 , B60C19/00 , B60C2019/004 , G01M17/02
Abstract: Provided is a wear amount detection device that is able to detect that a tire is in a worn state, during running, without a special sensor while suppressing an increase in cost. The device includes: a rotation sensor (2) detecting rotation of a wheel (1) to measure a speed of an automobile; a signal processing (3) extracting rotation speed fluctuations synchronized with rotation, from a rotation signal detected by the rotation sensor, and obtain a rotation speed fluctuation pattern synchronized with rotation, from rotation speed fluctuations over a plurality of rotations; and a wear state determination (4) configured to: obtain, from the obtained pattern, a value of a component induced by a characteristic embodied in a tire (1a) of the wheel (1), the value varying in accordance with a wear state of the tire (1a); estimate a wear state of the tire (1a); and output the state.
Abstract translation: 提供一种磨损量检测装置，其能够在没有特殊传感器的运行期间检测轮胎处于磨损状态，同时抑制成本的增加。 该装置包括：旋转传感器（2），用于检测车轮（1）的旋转以测量汽车的速度; 信号处理（3）从旋转传感器检测到的旋转信号中提取与旋转同步的旋转速度波动，并且从多个旋转中的旋转速度波动获得与旋转同步的旋转速度波动模式; 以及磨损状态判定（4），其被配置为：从所获得的图案获得由车轮（1）的轮胎（1a）中体现的特征引起的分量的值，所述值根据磨损状态变化 的轮胎（1a）; 估计轮胎（1a）的磨损状态; 并输出状态。
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公开(公告)号：US20160146630A1
公开(公告)日：2016-05-26
申请号：US14904223
申请日：2014-07-02
Applicant: Toru TAKAHASHI , Tatsuo NAKAJIMA , Hiroyuki HAKAMATA , Ikuo UEMOTO , Shinji MIYAZAKI , Takuji HARANO , Takayuki ODA , NTN CORPORATION
Inventor： Toru TAKAHASHI , Tatsuo NAKAJIMA , Hiroyuki HAKAMATA , Ikuo UEMOTO , Shinji MIYAZAKI , Takuji HARANO , Takayuki ODA
IPC: G01D5/14
CPC classification number: G01D5/14 , G01D5/24438 , G01D5/2452 , G01D5/246
Abstract: A magnetic encoder device (3) of the present invention includes a base portion (33) having a mounting surface (33b) for mounting to a rotary shaft (2), a cored bar (35) fitted and fixed over the base portion (33), and a double-row magnetic encoder track (30) formed on the cored bar (35). Through movement of each of magnetic poles of the magnetic encoder track (30) over a region opposed to a magnetic sensor (4), an angle of the rotating rotary shaft is detected. The base portion (33) is formed of a sintered metal, and the mounting surface (33b) is subjected to sizing.
Abstract translation: 本发明的磁性编码器装置（3）包括具有用于安装到旋转轴（2）的安装表面（33b）的基部（33），安装并固定在基部（33）上的芯棒 ）和形成在芯棒（35）上的双列磁性编码器轨道（30）。 通过磁性编码器轨道（30）的每个磁极在与磁性传感器（4）相对的区域上移动，检测旋转的旋转轴的角度。 基部（33）由烧结金属形成，安装面（33b）进行上胶。
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公开(公告)号：US20150375563A1
公开(公告)日：2015-12-31
申请号：US14411116
申请日：2013-06-18
Applicant: NTN CORPORATION
Inventor： Toru TAKAHASHI
CPC classification number: B60B27/0068 , B60B27/0005 , F16C19/184 , F16C19/522 , F16C41/007 , F16C2326/02 , G01L5/0019 , G01L5/16
Abstract: A vehicle-wheel bearing device with a sensor of the present invention includes a plurality of sensors, mounted to a vehicle-wheel bearing, for detecting load thereon, and signal processor for processing an output signal therefrom to generate a signal vector, and load calculator for calculating load acting on a wheel based on the signal vector. The load calculator includes: a coefficient conversion processing unit for calculating an actual-state load estimation coefficient MC that is a load estimation coefficient for a state where the bearing is mounted to an actual vehicle, based on a standard load estimation coefficient MB that is a determined standard load estimation coefficient for the bearing; and a load calculation unit for calculating load on the wheel based on the signal vector and the actual-state load estimation coefficient MC calculated by the coefficient conversion processing unit.
Abstract translation: 具有本发明的传感器的车轮轴承装置包括安装在车轮轴承上的多个传感器，用于检测负载，以及用于处理其输出信号以产生信号矢量的信号处理器，并且负载计算器 用于基于信号矢量计算作用在车轮上的载荷。 负载计算器包括：系数转换处理单元，用于基于作为实际车辆的标准负载估计系数MB，计算作为将轴承安装到实际车辆的状态的负载估计系数的实际负载估计系数MC 确定轴承的标准载荷估计系数; 以及负载计算单元，用于基于由系数转换处理单元计算的信号矢量和实际负载估计系数MC来计算车轮上的负载。
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Patent Agency Ranking
公开(公告)号：US20150267742A1
公开(公告)日：2015-09-24
申请号：US14729897
申请日：2015-06-03
Applicant: NTN CORPORATION
Inventor： Wataru HATAKEYAMA , Toru TAKAHASHI , Kentarou NISHIKAWA
CPC classification number: F16C19/522 , B60B27/0005 , B60B27/0068 , F16C19/186 , F16C2326/02 , G01L5/0009 , G01L5/20 , G01M13/04
Abstract: A sensor-equipped wheel support bearing assembly is provided which performs high-accuracy load estimation without providing with another sensor, even in a state where a ground contact load on a wheel supported by the bearing is very low as compared to other wheels. The assembly includes: a plurality of sensor units (20) detecting a load on a wheel support bearing segment (100); sensor signal calculator (31) processing sensor signals (S) from the units; and load calculation processor (32) calculating a load on a road surface contact point on a wheel, based on the processed information. The processor (32) determines whether a target wheel is in a predetermined low load state, based on information of a detected load on a wheel other than the target wheel; and switches a load calculation scheme in accordance with a result of the determination to calculate a load on the wheel.
Abstract translation: 提供了一种传感器配置的车轮支撑轴承组件，即使在与其他车轮相比，由轴承支撑的车轮上的接地接触载荷非常低的状态下，也不会提供另一传感器，其执行高精度负载估计。 组件包括：多个传感器单元（20），用于检测车轮支撑轴承段（100）上的负载; 传感器信号计算器（31）处理来自该单元的传感器信号（S） 和负载计算处理器（32），基于所处理的信息计算车轮上的路面接触点的负荷。 基于在目标车轮以外的车轮上检测到的负载的信息，处理器（32）确定目标车轮是否处于预定的低负载状态; 并且根据确定的结果切换负载计算方案以计算车轮上的负载。
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公开(公告)号：US20190195192A1
公开(公告)日：2019-06-27
申请号：US16328163
申请日：2017-08-02
Applicant: NTN CORPORATION
Inventor： Toru TAKAHASHI
CPC classification number: F03D1/0675 , F03D1/06 , F03D7/0276 , F03D17/00 , G01M99/00 , Y02E10/721
Abstract: A condition monitoring apparatus which monitors a condition of equipment including a rotor includes a storage and a calculator. The storage stores a plurality of results obtained from a plurality of divided data strings, respectively, resulting from division of a data string obtained by sampling at a regular time interval of signals from sensors provided in the equipment. The calculator estimates a plurality of rotation speeds corresponding to the plurality of divided data strings from the plurality of results accumulated in the storage, respectively, corrects the plurality of divided data strings based on the plurality of rotation speeds, respectively, and generates a corrected data string by combining the plurality of corrected divided data strings. A condition monitoring apparatus capable of accurately analyzing data obtained from the sensors while increase in cost is suppressed and influence by variation in rotation is lessened is thus provided.
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公开(公告)号：US20190101104A1
公开(公告)日：2019-04-04
申请号：US16087508
申请日：2017-03-15
Applicant: NTN CORPORATION
Inventor： Yosuke SUZUKI , Toru TAKAHASHI
IPC: F03D17/00 , G01H17/00 , G01M13/045
Abstract: A first vibration sensor measures vibration of a bearing. A second vibration sensor for measuring background noise received by the first vibration sensor is installed so as not to receive vibration of the bearing. A data acquisition device receives a first signal that is a measurement signal of the first vibration sensor and a second signal that is a measurement signal of the second vibration sensor and outputs a third signal obtained by subtracting the second signal from the first signal as data indicating vibration of the bearing.
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公开(公告)号：US20180223813A1
公开(公告)日：2018-08-09
申请号：US15746173
申请日：2016-06-24
Applicant: NTN CORPORATION
Inventor： Toru TAKAHASHI
CPC classification number: F03D17/00 , F03D7/0204 , F03D80/82 , F05B2270/329 , F05B2270/80 , G01C17/02 , G01H11/02 , Y02E10/723
Abstract: A condition monitoring system for a wind turbine generator includes an orientation sensor installed in a nacelle and configured to detect an orientation of the nacelle and a condition monitoring unit configured to receive an output from the orientation sensor and perform at least any one of recording, analysis, or transmission of a signal. The condition monitoring unit preferably detects, based on the output from the orientation sensor, the movement along the rotation direction of the nacelle associated with a torsional oscillation of the tower. The orientation sensor can also detect slow directional fluctuations that are difficult to detect using an acceleration sensor or the like, and thus, can satisfactorily detect the rotation of the nacelle associated with the torsional oscillation of the tower.
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公开(公告)号：US20180224324A1
公开(公告)日：2018-08-09
申请号：US15746740
申请日：2016-06-27
Applicant: NTN CORPORATION
Inventor： Hiroshi IKEDA , Toru TAKAHASHI
CPC classification number: G01H1/006 , F03D17/00 , F05B2260/80 , F05B2260/83 , F05B2270/304 , F05B2270/334 , G01M15/14 , G01M99/00 , Y02E10/723
Abstract: An abnormality diagnosis device, which is capable of detecting that a vibration sensor is detached from a measurement object, includes a vibration sensor and a control device. The vibration sensor is attached to a measurement object, and measures vibration of the measurement object. The control device determines whether or not the vibration sensor is detached from the measurement object, based on data received from the vibration sensor. The control device calculates a first partial overall value in a first frequency band. The control device calculates a second partial overall value in a second frequency band which is higher than the first frequency band. The control device calculates an index value having a correlation with a ratio between the first partial overall value and the second partial overall value. The control device determines whether or not the vibration sensor is detached from the measurement object, based on the index value.
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