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    • 7. 发明授权
    • CSK communication system
    • CSK通信系统
    • US5132986A
    • 1992-07-21
    • US631921
    • 1990-12-21
    • Kaoru EndoNaomichi TakahashiSoichi Tsumura
    • Kaoru EndoNaomichi TakahashiSoichi Tsumura
    • H04B1/707H04J13/00H04L23/02
    • H04B1/709H04B1/707H04J13/0074H04L23/02
    • The present invention provides new arrangements for various components of a CSK communication system: modulator, correlators, demodulator, carrier detection circuit, and synchronization control circuit. The various improvements provide more accurate demodulation of data from the received signal in the presence of noise and signal deterioration. A modulator configuration permits the CSK system to use two M series codes in which the second code is simply a phase shifted version of the first code. The PN correlators, via shift-registers, efficiently output two correlation signals. The demodulator accepts two correlation signals from the correlators, detects auto-correlation peaks in the correlation signals, and uses the peaks to accurately determine whether the received bit has a value of "1" or "0". The carrier detecting circuit detects the presence of data in the received signal. A carrier detecting circuit conveniently allows demodulation of data without exact synchronization of the center of demodulator's monitoring window to auto-correlation peaks. The synchronization control circuit generates accurate timing pulses that mark the start and end of each data bit. If auto-correlation peaks appear consistently in one location for the duration of N consecutive data bits, subsequent timing pulses are delayed in accordance with weighted averages of the stored locations of auto-correlation peaks. In one embodiment, separate correlation signal monitoring windows for demodulation and synchronization tracking may be set independently of each other, enabling the demodulator to clearly distinguish between an actual auto-correlation peaks and an inter-correlation peak, and the synchronization control circuit to attain stability by "averaging" out temporal effects of noise.
    • 8. 发明授权
    • Slip ring device
    • 滑环装置
    • US08376757B2
    • 2013-02-19
    • US13288075
    • 2011-11-03
    • Atsushi YamamotoKaoru Endo
    • Atsushi YamamotoKaoru Endo
    • H01R39/00
    • H01R39/64H01R13/6463H01R13/6473H01R39/34H01R43/10H01R2107/00
    • A slip ring device includes a hollow pipe-shaped shaft rotatably supported inside a tubular body of a main case through a bearing and an electricity-collecting body integrally and concentrically provided in the shaft. The electricity-collecting body preferably includes a plurality of electricity-collecting rings and a plurality of insulating rings alternately layered with one another. The slip ring device further includes a plurality of brushes held by the main case and tip end portions making sliding contact with outer circumferential surfaces of the electricity-collecting rings and a plurality of lead lines introduced into the shaft. The lead lines include tip end portions electrically connected to the respective electricity-collecting rings. Two or more of the lead lines include shielded lines.
    • 滑环装置包括通过轴承可旋转地支撑在主壳体的管状体内的中空管状轴,并且一体地并心设置在轴上的集电体。 集电体优选包括多个集电环和交替层叠的多个绝缘环。 滑环装置还包括由主壳体保持的多个电刷和与集电环的外周面滑动接触的多个引线和引入轴的多个引线。 引线包括电连接到相应的集电环的末端部分。 两条或多条引线包括屏蔽线。
    • 9. 发明授权
    • Spread spectrum power line communications
    • 扩频电力线通信
    • US4864589A
    • 1989-09-05
    • US889006
    • 1986-07-24
    • Kaoru Endo
    • Kaoru Endo
    • H04B3/54H04L12/407
    • H04L12/40019H04B3/542H04L12/407H04B2203/5416H04B2203/542H04B2203/5425H04B2203/5441H04B2203/545H04B2203/5458H04B2203/5483H04B2203/5495
    • This invention is directed to various improvements in spread spectrum power line communications. One aspect of the invention relates to collision avoidance between varius "slave" unit transmitters trying to send messages to a single "master" unit receiver by detecting whether the transmission path is in use and refraining from transmitting if it is. Other aspects of the invention relate to controlling the frequencies of spread spectrum data messages transmitted, using gold codes to identify the slave units, and switching frequency bands on the powe line to avoid frequencies where there has been a deterioration of transmission. In each embodiment, the signal modulated over the power line is modulated by a signal which is synchronous with A.C. power flowing through the power line used for communications. The transmitted spread spectrum modulated signal then may be demodulated to isolate the transmitted data even when changes in the transmission characteristics of the power line (due to load changes and the like) occur.
    • 本发明涉及扩频电力线通信的各种改进。 本发明的一个方面涉及试图通过检测传输路径是否在使用中并且避免发送是否将消息发送到单个“主”单元接收机的各个“从”单元发射机之间的冲突避免。 本发明的其他方面涉及使用用于识别从单元的金码来控制发射的扩频数据信息的频率,以及切换电力线上的频带以避免发生恶化的频率。 在每个实施例中,通过电力线调制的信号由与用于通信的电力线流过的交流电力同步的信号调制。 即使当电力线的传输特性的变化(由于负载变化等)发生变化时,发送的扩频调制信号也可以被解调以隔离所发送的数据。
    • 10. 发明授权
    • Joystick for electro-hydraulic control system
    • 电动液压控制系统操纵杆
    • US07265304B2
    • 2007-09-04
    • US11295617
    • 2005-12-07
    • Nobuhiko IchikiMitsuhisa TougasakiKaoru EndoHiroyasu Masubuchi
    • Nobuhiko IchikiMitsuhisa TougasakiKaoru EndoHiroyasu Masubuchi
    • H01H25/00
    • G05G9/047E02F9/2004F15B13/0424G05G2009/04748Y10T74/20201
    • A joystick for an electro-hydraulic control system is provided with a rotary potentiometer having a pivotable arm. This pivotable arm is integrally arranged on a rotary shaft and pivots responsive to pivotal control of a joystick in a predetermined direction or a direction opposite to the predetermined direction. The joystick is also provided with a torsion coil spring for normally holding the pivotable arm in a neutral position, a pin arranged on the pivotable arm and capable of expanding the torsion coil spring upon pivotal movement of the pivotable arm, a holding pin for holding the torsion coil spring at its coil portion, and a cover member having a pair of guide portions for limiting movements of the coil portion of the torsion coil spring in the predetermined direction and the opposition direction when the torsion coil spring is in its neutral position.
    • 用于电液控制系统的操纵杆设置有具有可枢转臂的旋转电位器。 该可枢转臂一体地布置在旋转轴上并且响应于操纵杆在预定方向或与预定方向相反的方向的枢转控制而枢转。 操纵杆还设置有用于将可枢转臂正常地保持在中立位置的扭力螺旋弹簧,设置在可枢转臂上的销,并且能够在可枢转臂的枢转运动时使扭转螺旋弹簧膨胀;保持销, 扭转螺旋弹簧在其线圈部分,以及盖构件,具有一对引导部分,用于在扭转螺旋弹簧处于其中立位置时限制扭转螺旋弹簧的线圈部分在预定方向和相反方向上的运动。