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    • 3. 发明授权
    • Passive radar device
    • 被动雷达装置
    • US09400323B2
    • 2016-07-26
    • US13984936
    • 2011-02-18
    • Kei SuwaTadashi OshimaShohei NakamuraToshio Wakayama
    • Kei SuwaTadashi OshimaShohei NakamuraToshio Wakayama
    • G01S13/04G01S7/285G01S13/46G01S13/524G01S13/87
    • G01S7/285G01S13/46G01S13/5244G01S13/5246G01S13/878
    • A passive radar device includes: a pulse-by-pulse range compression unit executing cross-correlation processing between received signals of a direct wave and scattered wave on each of pulses divided by a direct-wave reception unit and a scattered-wave reception unit, and calculating a pulse-by-pulse range profile; a block-by-block Doppler processing unit calculating a first Doppler frequency spectrum by executing pulse-direction Fourier transform in block units each grouping plural pulses; a Doppler frequency cell-associated range migration compensation unit compensating a range-direction movement amount with respect to the first Doppler frequency spectrum on a Doppler-frequency-cell-by-Doppler-frequency-cell basis and on a block-by-block basis; and a block-direction Doppler processing unit calculating a second Doppler frequency spectrum by executing block-direction Fourier transform on an output from the Doppler frequency cell-associated range migration compensation unit.
    • 无源雷达装置包括:逐脉冲范围压缩单元,在由直接波接收单元和散射波接收单元分割的每个脉冲上执行直接波和散射波的接收信号之间的互相关处理, 并计算逐脉冲范围分布; 逐块多普勒处理单元,通过以分组多个脉冲的块为单位执行脉冲方向傅里叶变换来计算第一多普勒频谱; 多普勒频率单元相关范围迁移补偿单元,基于多普勒频率单元 - 多普勒频率单元,并且逐个基础地补偿相对于第一多普勒频谱的范围方向移动量 ; 以及块方向多普勒处理单元,通过对来自多普勒频率单元关联范围偏移补偿单元的输出执行块方向傅里叶变换来计算第二多普勒频谱。
    • 8. 发明授权
    • Resin-made cage and bearing
    • 树脂制保持架和轴承
    • US08113718B2
    • 2012-02-14
    • US12224922
    • 2007-03-07
    • Takashi ItoShohei NakamuraMasayuki NozakiMasaki EgamiTakuya IshiiToyohiko OtaAkira OkayasuRei Mihara
    • Takashi ItoShohei NakamuraMasayuki NozakiMasaki EgamiTakuya IshiiToyohiko OtaAkira OkayasuRei Mihara
    • F16C33/44F16C33/38
    • F16C33/44F02K9/60F04D29/023F04D29/026F04D29/049F04D29/059F05D2300/43F05D2300/432F05D2300/509F16C19/163F16C33/3831F16C33/6696F16C2300/52F16C2360/42
    • It is an object of the present invention to provide a cage that can be used in a cryogenic-temperature environment or a vacuum without providing the cage with a complicated construction and without performing special treatment and a bearing using the cage. A cage made of resin has an annular main body having a plurality of pocket portions radially penetrating the main body; and a plurality of pocket members, provided on the annular main body, which hold rolling elements of a rolling bearing. The main body is a molding of a first resin composition consisting of a first resin and a solid lubricant mixed therewith; and at least a rolling element-retaining surface of each of the pocket members is made of a second resin composition containing fluorocarbon resin as a main component thereof. The molding of the first resin composition has a tensile strength of not less than 30 MPa and a heat-resistant temperature of not less than 200° C. The second resin composition is a fluorocarbon resin composition. The rolling bearing is constructed of an inner ring, an outer ring, the rolling elements interposed between the inner ring and the outer ring, and the cage. The rolling bearing is used for a turbopump, of a rocket engine, which uses a liquid fuel.
    • 本发明的一个目的是提供一种可以在低温环境或真空中使用的保持架,而不会使笼子具有复杂的构造并且不进行特殊处理和使用保持架的轴承。 由树脂构成的保持架具有环状主体,该主体具有径向穿透主体的多个口袋部; 以及设置在保持滚动轴承的滚动体的环状主体上的多个袋状部件。 主体是由第一树脂和与其混合的固体润滑剂组成的第一树脂组合物的模制品; 并且每个袋构件的至少一个滚动元件保持表面由包含氟碳树脂作为其主要成分的第二树脂组合物制成。 第一树脂组合物的成型的拉伸强度为30MPa以上,耐热温度为200℃以上。第二树脂组合物为碳氟树脂组合物。 滚动轴承由内圈,外圈,插入在内圈和外圈之间的滚动元件和保持架构成。 滚动轴承用于使用液体燃料的火箭发动机的涡轮泵。
    • 9. 发明授权
    • Rolling bearing
    • 滚动轴承
    • US07563031B2
    • 2009-07-21
    • US11417208
    • 2006-05-04
    • Shohei Nakamura
    • Shohei Nakamura
    • F16C32/00
    • F16C19/26F16C19/52F16C33/34F16C2360/00G01P3/443G01P3/486G01P3/488
    • A rolling bearing includes an outer stationary ring, an inner rotating ring, and a plurality of rollers disposed between the inner and outer rings. An optical sensor is mounted on the outer ring. A computer receives the output of the optical sensor to calculate the revolving speed of the rollers from the number of rollers that pass the sensor per unit time, as detected by the optical sensor. The computer then calculates the time-integrated difference between the revolving speed of the rollers and the rotational speed of a rotary shaft on which the inner ring is mounted, as detected by a rotational sensor. Based on the thus obtained difference, it is possible to detect skidding of the rollers at an earlier stage.
    • 滚动轴承包括外固定环,内旋转环和布置在内圈和外圈之间的多个辊。 光学传感器安装在外圈上。 计算机接收光学传感器的输出,以便通过光学传感器检测到的每单位时间通过传感器的滚子数来计算滚子的转速。 然后,计算机通过旋转传感器检测到滚子的旋转速度与安装有内圈的旋转轴的转速之间的时间积分差。 基于如此获得的差异,可以在较早的阶段检测滚筒的打滑。