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1. 发明授权

US08314531B2 Piezoelectric actuator driver circuit 有权
标题翻译：压电致动器驱动电路
公开(公告)号：US08314531B2
公开(公告)日：2012-11-20
申请号：US12883291
申请日：2010-09-16
申请人： Midori Sunaga , Toshinari Tabata , Gaku Kamitani
发明人： Midori Sunaga , Toshinari Tabata , Gaku Kamitani
IPC分类号： H01L41/09 , H02N2/06
CPC分类号： H01L41/042
摘要： In a piezoelectric-actuator driving circuit for driving a piezoelectric actuator, an amplifier circuit amplifies a signal output from a feedback circuit and supplies the amplified signal to a non-inverting amplifier circuit and an inverting amplifier circuit. The non-inverting amplifier circuit amplifies the output voltage of the amplifier circuit with a predetermined gain and applies the amplified voltage to a first terminal of the piezoelectric actuator. The inverting amplifier circuit inverts and amplifies the output voltage of the amplifier circuit with the same gain as that of the non-inverting amplifier circuit and then applies the amplified voltage to a second terminal of the piezoelectric actuator through resistors. The feedback circuit amplifies a difference between voltages at respective ends of the resistor and supplies the amplified difference to the amplifier circuit.
摘要翻译：在用于驱动压电致动器的压电致动器驱动电路中，放大器电路放大从反馈电路输出的信号，并将放大的信号提供给非反相放大器电路和反相放大器电路。非反相放大器电路以预定的增益放大放大器电路的输出电压，并将放大的电压施加到压电致动器的第一端。反相放大器电路以与非反相放大器电路相同的增益来反相放大放大器电路的输出电压，然后通过电阻将放大的电压施加到压电致动器的第二端。反馈电路放大电阻器各端的电压差，并将放大的差值提供给放大器电路。

2. 发明申请

US20090232683A1 PIEZOELECTRIC MICRO-BLOWER 有权
标题翻译：压电微型鼓风机
公开(公告)号：US20090232683A1
公开(公告)日：2009-09-17
申请号：US12472833
申请日：2009-05-27
申请人： ATSUHIKO HIRATA , Gaku Kamitani , Hiroaki Wada , Midori Sunaga , Shungo Kanai
发明人： ATSUHIKO HIRATA , Gaku Kamitani , Hiroaki Wada , Midori Sunaga , Shungo Kanai
IPC分类号： F04B43/04
CPC分类号： F04B45/04 , F04B43/046 , F04B45/047 , F04B53/1077
摘要： A piezoelectric micro-blower capable of efficiently conveying compressive fluid without use of a check valve and ensuring a sufficient flow rate. The micro-blower has a blower body with a first wall and a second wall. Openings are formed in the respective walls and face a center of a diaphragm. An inflow path allowing the openings to communicate with the outside is formed between the walls. By applying a voltage to a piezoelectric element to cause the diaphragm to vibrate, a part of the first wall close to the first opening vibrates. Thus, gas can be drawn from the inflow path and discharged from the opening in the second wall.
摘要翻译：一种能够有效地输送压缩流体而不使用止回阀并确保足够的流量的压电微型鼓风机。微型鼓风机具有带有第一壁和第二壁的鼓风机主体。开口形成在相应的壁中并面向隔膜的中心。在壁之间形成允许开口与外部连通的流入路径。通过向压电元件施加电压以使隔膜振动，靠近第一开口的第一壁的一部分振动。因此，气体可以从流入路径抽出并从第二壁的开口排出。

3. 发明授权

US08678787B2 Piezoelectric micro-blower 有权
标题翻译：压电式微型鼓风机
公开(公告)号：US08678787B2
公开(公告)日：2014-03-25
申请号：US12472833
申请日：2009-05-27
申请人： Atsuhiko Hirata , Gaku Kamitani , Hiroaki Wada , Midori Sunaga , Shungo Kanai
发明人： Atsuhiko Hirata , Gaku Kamitani , Hiroaki Wada , Midori Sunaga , Shungo Kanai
IPC分类号： F04B45/04
CPC分类号： F04B45/04 , F04B43/046 , F04B45/047 , F04B53/1077
摘要： A piezoelectric micro-blower capable of efficiently conveying compressive fluid without use of a check valve and ensuring a sufficient flow rate. The micro-blower has a blower body with a first wall and a second wall. Openings are formed in the respective walls and face a center of a diaphragm. An inflow path allowing the openings to communicate with the outside is formed between the walls. By applying a voltage to a piezoelectric element to cause the diaphragm to vibrate, a part of the first wall close to the first opening vibrates. Thus, gas can be drawn from the inflow path and discharged from the opening in the second wall.
摘要翻译：一种能够有效地输送压缩流体而不使用止回阀并确保足够的流量的压电微型鼓风机。微型鼓风机具有带有第一壁和第二壁的鼓风机主体。开口形成在相应的壁中并面向隔膜的中心。在壁之间形成允许开口与外部连通的流入路径。通过向压电元件施加电压以使隔膜振动，靠近第一开口的第一壁的一部分振动。因此，气体可以从流入路径抽出并从第二壁的开口排出。

4. 发明申请

US20090232682A1 PIEZOELECTRIC MICRO-BLOWER 审中-公开
公开(公告)号：US20090232682A1
公开(公告)日：2009-09-17
申请号：US12472798
申请日：2009-05-27
申请人： Atsuhiko Hirata , Gaku Kamitani , Hiroaki Wada , Midori Sunaga , Shungo Kanai
发明人： Atsuhiko Hirata , Gaku Kamitani , Hiroaki Wada , Midori Sunaga , Shungo Kanai
IPC分类号： F04B43/04
CPC分类号： F04B45/04 , F04B43/046 , F04B45/047 , F04B53/1077
摘要： A piezoelectric micro-blower capable of efficiently conveying compressive fluid without use of a check valve and ensuring a sufficient flow rate. The micro-blower has a blower body with a first wall and a second wall. Openings are formed in the respective walls and face a center of a diaphragm. An inflow path allowing the openings to communicate with the outside is formed between the walls. By applying a voltage to a piezoelectric element to cause the diaphragm to vibrate, a part of the first wall close to the first opening vibrates. Thus, gas can be drawn from the inflow path and discharged from the opening in the second wall.

5. 发明申请

US20090148318A1 Piezoelectric Pump 审中-公开
标题翻译：压电泵
公开(公告)号：US20090148318A1
公开(公告)日：2009-06-11
申请号：US12367084
申请日：2009-02-06
申请人： Gaku Kamitani , Midori Sunaga
发明人： Gaku Kamitani , Midori Sunaga
IPC分类号： F04B17/00
CPC分类号： F04B43/046 , F04B43/04 , F04B45/04
摘要： A piezoelectric pump having a first opening in a center portion of a pump body, and a second opening apart from the center. An outer peripheral portion of a metal diaphragm is fixed to the pump body, and a piezoelectric element having a size that covers the first opening and does not cover the second opening is bonded to a back center portion of the diaphragm. By applying a voltage near the resonance frequency to the piezoelectric element, a portion of the diaphragm opposing the first opening and a portion of the diaphragm opposing the second opening are bent in opposite directions so that fluid is drawn in from one of the first opening and the second opening and is discharged from the other opening. Such a piezoelectric pump can increase the discharging pressure, and can reliably discharge the fluid even under a condition where the pressure on the discharging side is high.
摘要翻译：一种压电泵，其具有在泵体的中心部分中的第一开口和与中心分开的第二开口。金属隔膜的外周部分固定在泵体上，并且具有覆盖第一开口并且不覆盖第二开口的尺寸的压电元件被接合到隔膜的后中心部分。通过将谐振频率附近的电压施加到压电元件，与第一开口相对的隔膜的一部分和与第二开口相对的一部分隔膜相反方向弯曲，从而使流体从第一开口和第二个开口并从另一个开口排出。这样的压电泵即使在排出侧的压力高的条件下也能够提高排出压力，并且能够可靠地排出流体。

6. 发明申请

US20110068658A1 PIEZOELECTRIC ACTUATOR DRIVER CIRCUIT 有权
标题翻译：压电致动器驱动电路
公开(公告)号：US20110068658A1
公开(公告)日：2011-03-24
申请号：US12883356
申请日：2010-09-16
申请人： Gaku Kamitani , Toshinari Tabata
发明人： Gaku Kamitani , Toshinari Tabata
IPC分类号： H01L41/09
CPC分类号： H02N2/008 , F04D27/00 , F04D33/00
摘要： In a piezoelectric actuator driver circuit, a resistor provided to detect current is inserted in a current path for a piezoelectric actuator. A signal of a decreased voltage of the resistor is subjected to positive feedback to an amplifier circuit via a band-pass filter. An output signal of the amplifier circuit is subjected to negative feedback to the amplifier circuit via a band-elimination filter. The band-pass filter allows a signal of a fundamental resonant frequency of a piezoelectric device, which includes the piezoelectric actuator, to pass therethrough, and the band-elimination filter blocks the signal of the fundamental resonant frequency. Thus, a loop gain at a higher-order resonant frequency with respect to the fundamental resonant frequency becomes very low and a higher-order resonant mode can be effectively suppressed.
摘要翻译：在压电致动器驱动电路中，将用于检测电流的电阻插入用于压电致动器的电流通路中。电阻器的电压降低的信号经由带通滤波器对放大器电路进行正反馈。放大器电路的输出信号通过带除滤波器对放大器电路进行负反馈。带通滤波器允许包括压电致动器的压电装置的基本共振频率的信号通过，带阻滤波器阻挡基本谐振频率的信号。因此，相对于基本谐振频率的高阶谐振频率的环路增益变得非常低，并且可以有效地抑制高阶谐振模式。

7. 发明授权

US08508104B2 Piezoelectric actuator driver circuit 有权
标题翻译：压电致动器驱动电路
公开(公告)号：US08508104B2
公开(公告)日：2013-08-13
申请号：US13563774
申请日：2012-08-01
申请人： Gaku Kamitani , Toshinari Tabata
发明人： Gaku Kamitani , Toshinari Tabata
IPC分类号： H02N2/06 , H02N2/00
CPC分类号： H02N2/008 , F04D27/00 , F04D33/00
摘要： In a piezoelectric actuator driver circuit, a resistor provided to detect current is inserted in a current path for a piezoelectric actuator. A signal of a decreased voltage of the resistor is subjected to positive feedback to an amplifier circuit via a band-pass filter. An output signal of the amplifier circuit is subjected to negative feedback to the amplifier circuit via a band-elimination filter. The band-pass filter allows a signal of a fundamental resonant frequency of a piezoelectric device, which includes the piezoelectric actuator, to pass therethrough, and the band-elimination filter blocks the signal of the fundamental resonant frequency. Thus, a loop gain at a higher-order resonant frequency with respect to the fundamental resonant frequency becomes very low and a higher-order resonant mode can be effectively suppressed.
摘要翻译：在压电致动器驱动电路中，将用于检测电流的电阻插入用于压电致动器的电流通路中。电阻器的电压降低的信号经由带通滤波器对放大器电路进行正反馈。放大器电路的输出信号通过带除滤波器对放大器电路进行负反馈。带通滤波器允许包括压电致动器的压电装置的基本共振频率的信号通过，带阻滤波器阻挡基本谐振频率的信号。因此，相对于基本谐振频率的高阶谐振频率的环路增益变得非常低，并且可以有效地抑制高阶谐振模式。

8. 发明授权

US08283836B2 Piezoelectric actuator driver circuit 有权
标题翻译：压电致动器驱动电路
公开(公告)号：US08283836B2
公开(公告)日：2012-10-09
申请号：US12883356
申请日：2010-09-16
申请人： Gaku Kamitani , Toshinari Tabata
发明人： Gaku Kamitani , Toshinari Tabata
IPC分类号： H01L41/09 , H02N2/06
CPC分类号： H02N2/008 , F04D27/00 , F04D33/00
摘要： In a piezoelectric actuator driver circuit, a resistor provided to detect current is inserted in a current path for a piezoelectric actuator. A signal of a decreased voltage of the resistor is subjected to positive feedback to an amplifier circuit via a band-pass filter. An output signal of the amplifier circuit is subjected to negative feedback to the amplifier circuit via a band-elimination filter. The band-pass filter allows a signal of a fundamental resonant frequency of a piezoelectric device, which includes the piezoelectric actuator, to pass therethrough, and the band-elimination filter blocks the signal of the fundamental resonant frequency. Thus, a loop gain at a higher-order resonant frequency with respect to the fundamental resonant frequency becomes very low and a higher-order resonant mode can be effectively suppressed.
摘要翻译：在压电致动器驱动电路中，将用于检测电流的电阻插入用于压电致动器的电流通路中。电阻器的电压降低的信号经由带通滤波器对放大器电路进行正反馈。放大器电路的输出信号通过带除滤波器对放大器电路进行负反馈。带通滤波器允许包括压电致动器的压电装置的基本共振频率的信号通过，带阻滤波器阻挡基本谐振频率的信号。因此，相对于基本谐振频率的高阶谐振频率的环路增益变得非常低，并且可以有效地抑制高阶谐振模式。

9. 发明申请

US20090142209A1 Piezoelectric Pump 有权
标题翻译：压电泵
公开(公告)号：US20090142209A1
公开(公告)日：2009-06-04
申请号：US12351158
申请日：2009-01-09
申请人： Atsuhiko Hirata , Shungo Kanai , Gaku Kamitani
发明人： Atsuhiko Hirata , Shungo Kanai , Gaku Kamitani
IPC分类号： F04B17/03
CPC分类号： F04B43/046 , H01L41/0471 , H01L41/083 , H01L41/0973 , H01L41/257
摘要： A piezoelectric pump capable of generating a large displacement at a central portion of a piezoelectric element even when a driving voltage is relatively low and preventing short-circuits caused by migration. The piezoelectric pump includes a pump body with a pump chamber, and a piezoelectric element that closes the pump chamber. The central area and the peripheral area of the piezoelectric element are bent in opposite directions by applying voltages to the piezoelectric element so that the volume of the pump chamber is changed. The piezoelectric element is a laminate including a plurality of piezoelectric layers with electrodes interposed therebetween. The central area and the peripheral area of each piezoelectric layer are polarized opposite to each other in the thickness direction, and the electrodes are formed such that voltages in the same direction in the thickness direction are applied to the central area and the peripheral area of each piezoelectric layer. Since voltages at the same potential are applied to the electrodes formed in the same planes of the piezoelectric layers, short-circuits caused by migration can be prevented.
摘要翻译：即使在驱动电压相对较低并且防止迁移引起的短路的情况下，也能够在压电元件的中央部产生较大的位移的压电泵。压电泵包括具有泵室的泵体和关闭泵室的压电元件。通过向压电元件施加电压使压电元件的中心区域和周边区域沿相反方向弯曲，使得泵室的体积发生变化。压电元件是包括多个压电层的层叠体，其间具有电极。每个压电层的中心区域和周边区域在厚度方向上彼此相反地极化，并且电极形成为使得厚度方向上相同方向的电压施加到每个的中心区域和周边区域压电层。由于将相同电位的电压施加到形成在压电层的同一平面上的电极，所以可以防止由迁移引起的短路。

10. 发明授权

US07540885B2 Method of processing a ceramic capacitor 有权
标题翻译：陶瓷电容器的处理方法
公开(公告)号：US07540885B2
公开(公告)日：2009-06-02
申请号：US10218395
申请日：2002-08-15
申请人： Gaku Kamitani
发明人： Gaku Kamitani
IPC分类号： H01G9/00
CPC分类号： H01G4/12 , Y10T29/417 , Y10T29/43 , Y10T29/435 , Y10T29/49004 , Y10T29/49144
摘要： A method of processing a ceramic capacitor includes a first step of applying a DC voltage to a ceramic capacitor by a first DC voltage source, and a second step of applying a DC voltage by a second DC voltage source to generate in the ceramic capacitor a polarization in a direction opposite to a direction of a polarization generated by the application of the DC voltage in the first step, thereby reducing electric charge remaining in the ceramic capacitor.
摘要翻译：一种陶瓷电容器的处理方法包括：通过第一直流电压源向陶瓷电容器施加直流电压的第一步骤，以及由第二直流电压源施加直流电压以在陶瓷电容器中产生极化的第二步骤在与第一步骤中施加直流电压产生的极化方向相反的方向上，从而减少陶瓷电容器中剩余的电荷。

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