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    Three-dimension active silencer
    1.
    发明授权
    Three-dimension active silencer 失效

    公开(公告)号：US06901147B1

    公开(公告)日：2005-05-31

    申请号：US09604904

    申请日：2000-06-28

    申请人： Akihiko Enamito ,  Takuro Hayashi ,  Kunio Matsukura ,  Satoshi Aoyagi ,  Tsutomu Shioyama

    发明人： Akihiko Enamito ,  Takuro Hayashi ,  Kunio Matsukura ,  Satoshi Aoyagi ,  Tsutomu Shioyama

    IPC分类号： A61F11/06 ,  G10K11/16 ,  G10K11/178 ,  H03B29/00

    CPC分类号： G10K11/178 ,  G10K2210/12822

    摘要： A three-dimension active silencer includes a measuring unit for detecting a signal relating to a sound radiated from a target sound source which is located in a closed box. A plurality of additional sound sources are arranged around the target sound source. A microphone is arranged at a predetermined position for detecting a sound power at the position. A controller is adapted to control respective amplitudes of the additional sound sources which can be different from an amplitude of the target sound source and respective phases of the additional sound sources, based on the signal detected by the measuring unit, in such a manner that the microphone detects the lowest sound power. The additional sound sources are arranged in such a manner that a position xp of the target sound source, respective relative positions di (i=1, 2, . . . , N) of the N additional sound sources from the target sound source and a wave number k of the sound radiated from the target sound source can substantially satisfy the following expression. 1 N ⁢   ⁢ ∑ i = 1 N ⁢   ⁢ cos ⁢   ⁢ k ⁢   ⁢ ( x p - d i ) - cos ⁢   ⁢ k · x p ≅ 0 According to the feature, it can be achieved to reduce the total sound power in the closed box including the target sound source.

    Three-dimension active silencer
    2.
    发明申请
    Three-dimension active silencer 审中-公开

    公开(公告)号：US20050084115A1

    公开(公告)日：2005-04-21

    申请号：US10972320

    申请日：2004-10-26

    申请人： Akihiko Enamito ,  Takuro Hayashi ,  Kunio Matsukura ,  Satoshi Aoyagi ,  Tsutomu Shioyama

    发明人： Akihiko Enamito ,  Takuro Hayashi ,  Kunio Matsukura ,  Satoshi Aoyagi ,  Tsutomu Shioyama

    IPC分类号： A61F11/06 ,  G10K11/16 ,  G10K11/178 ,  H03B29/00

    CPC分类号： G10K11/178 ,  G10K2210/12822

    摘要： A three-dimension active silencer includes a measuring unit for detecting a signal relating to a sound radiated from a target sound source which is located in a closed box. A plurality of additional sound sources are arranged around the target sound source. A microphone is arranged at a predetermined position for detecting a sound power at the position. A controller is adapted to control respective amplitudes of the additional sound sources which can be different from an amplitude of the target sound source and respective phases of the additional sound sources, based on the signal detected by the measuring unit, in such a manner that the microphone detects the lowest sound power. The additional sound sources are arranged in such a manner that a position xp of the target sound source, respective relative positions di (i=1, 2, . . . , N) of the N additional sound sources from the target sound source and a wave number k of the sound radiated from the target sound source can substantially satisfy the following expression. 1 N ⁢ ∑ i = 1 N ⁢   ⁢ cos ⁢   ⁢ k ⁡ ( x p - d i ) - cos ⁢   ⁢ k · x p ≅ 0 According to the feature, it can be achieved to reduce the total sound power in the closed box including the target sound source.

    Monitoring system for detecting quench of superconductive coils
    5.
    发明授权
    Monitoring system for detecting quench of superconductive coils 失效
    用于检测超导线圈淬火的监控系统

    公开(公告)号：US4777437A

    公开(公告)日：1988-10-11

    申请号：US158033

    申请日：1988-02-12

    申请人： Ikuo Tashiro ,  Daisuke Ito ,  Kunio Matsukura ,  Mituyoshi Morohoshi

    发明人： Ikuo Tashiro ,  Daisuke Ito ,  Kunio Matsukura ,  Mituyoshi Morohoshi

    IPC分类号： H02H7/00 ,  G01R33/035

    CPC分类号： H02H7/001 ,  Y02E40/68

    摘要： In a monitoring system for detecting a quench in a superconductive coil to which AC power is supplied, a switch apparatus is connected between the coil and a A.C. power source. A voltage between a top of the coil and a dividing resistor connected in parallel with the coil is detected and converted into a voltage signal by a insulation amplifier and a current flowing through the coil 1 is detected by a current detector and is converted into a current signal by an amplifier. The voltage signal is detected with the current signal as a reference signal by a phase detector so that a signal component of the voltage signal in phase with the reference signal is outputted from the phase detector. The signal component is averaged in a averaging circuit, when the voltage signal is out-of-phase with the reference signal, an output signal is generated as an alarm signal from the averaging circuit.

    摘要翻译： 在用于检测提供有交流电力的超导线圈中的骤冷的监视系统中，开关装置连接在线圈和交流电源之间。 线圈顶部和与线圈并联的分压电阻之间的电压被检测并通过绝缘放大器转换成电压信号，流过线圈1的电流由电流检测器检测并被转换为电流 信号由放大器。 以相位检测器的电流信号作为参考信号检测电压信号，从而从相位检测器输出与基准信号同相的电压信号的信号分量。 信号分量在平均电路中被平均，当电压信号与参考信号异相时，输出信号作为来自平均电路的报警信号产生。