公开(公告)号：US08604674B2

公开(公告)日：2013-12-10

申请号：US13310869

申请日：2011-12-05

申请人： Katsumi Fujimoto

发明人： Katsumi Fujimoto

IPC分类号： H01L41/08

CPC分类号： H01L41/1136 ,  H02N2/188

摘要： A piezoelectric power generator that includes a piezoelectric multilayer body including a piezoelectric element that converts vibration into electricity and a substrate on which the piezoelectric multilayer body is mounted. The resonant frequency of the piezoelectric element coincides with the reference of the substrate so that the piezoelectric element efficiently vibrates. The addition of vibration portions in the substrate allows various resonant frequencies to be set.

摘要翻译： 一种压电发电机，其特征在于，具有将振动变换为电的压电元件和安装有所述压电叠层体的基板的压电叠层体。 压电元件的谐振频率与基板的基准一致，使得压电元件有效地振动。 在衬底中添加振动部分允许设定各种谐振频率。

公开(公告)号：US08334638B2

公开(公告)日：2012-12-18

申请号：US12836822

申请日：2010-07-15

申请人： Katsumi Fujimoto ,  Tsuguji Kambayashi

发明人： Katsumi Fujimoto ,  Tsuguji Kambayashi

IPC分类号： H01L41/113

CPC分类号： H02N2/186 ,  H01L41/113

摘要： A small-sized piezoelectric power generation device is provided which can generate electric power even with vibrations at low frequencies. The piezoelectric power generation device includes a piezoelectric element formed in a spiral shape and having a center-side end fixed to a first fixing member and an outer-side end fixed to a second fixing member. The piezoelectric element includes a first piezoelectric body formed in a spiral shape and polarized in a radial direction of the piezoelectric element from one side toward the other side. The first and second fixing members are arranged such that the second fixing member is displaceable relative to the first fixing member in a tangential direction x, whereas the second fixing member is restricted from displacing relative to the first fixing member in a perpendicular direction y.

摘要翻译： 提供了一种小型的压电发电装置，其即使在低频下也能产生振动，也能产生电力。 压电发电装置包括形成为螺旋状的压电元件，其中央侧端部固定于第一固定部件，外侧端部固定于第二固定部件。 压电元件包括​​形成为螺旋形并且从一侧向另一侧在压电元件的径向方向上极化的第一压电体。 第一和第二固定构件被布置成使得第二固定构件能够相对于第一固定构件沿切线方向x移动，而第二固定构件被限制为相对于第一固定构件在垂直方向y上的位移。

公开(公告)号：US20110148256A1

公开(公告)日：2011-06-23

申请号：US13036353

申请日：2011-02-28

申请人： Katsumi Fujimoto

发明人： Katsumi Fujimoto

IPC分类号： H02N2/18

CPC分类号： H02N2/186 ,  H01L41/113

摘要： A piezoelectric power generator that includes a support body, a piezoelectric element, and a bias compressive stress applying member. The piezoelectric element is placed on the support body. The piezoelectric element has a piezoelectric plate that is polarized in the thickness direction, and first and second electrodes that are each provided on a surface of the piezoelectric plate. The bias compressive stress applying member is supported on the side above the piezoelectric element by the support body. The bias compressive stress applying member applies to the piezoelectric element a bias compressive stress acting in the thickness direction of the piezoelectric plate, so that the magnitude of a compressive stress in the piezoelectric plate changes with a change in externally applied stress.

摘要翻译： 一种压电发电机，包括支撑体，压电元件和偏压压应力构件。 压电元件放置在支撑体上。 压电元件具有在厚度方向上极化的压电板，以及设置在压电板的表面上的第一和第二电极。 偏压应力施加部件通过支撑体支撑在压电元件的上方。 偏置压应力施加部件在压电元件上施加沿压电板的厚度方向作用的偏压压缩应力，使得压电板中的压缩应力的大小随外部施加的应力的变化而变化。

公开(公告)号：US20110018397A1

公开(公告)日：2011-01-27

申请号：US12836822

申请日：2010-07-15

申请人： Katsumi Fujimoto ,  Tsuguji Kambayashi

发明人： Katsumi Fujimoto ,  Tsuguji Kambayashi

IPC分类号： H02N2/18

CPC分类号： H02N2/186 ,  H01L41/113

摘要： A small-sized piezoelectric power generation device is provided which can generate electric power even with vibrations at low frequencies. The piezoelectric power generation device includes a piezoelectric element formed in a spiral shape and having a center-side end fixed to a first fixing member and an outer-side end fixed to a second fixing member. The piezoelectric element includes a first piezoelectric body formed in a spiral shape and polarized in a radial direction of the piezoelectric element from one side toward the other side. The first and second fixing members are arranged such that the second fixing member is displaceable relative to the first fixing member in a tangential direction x, whereas the second fixing member is restricted from displacing relative to the first fixing member in a perpendicular direction y.

摘要翻译： 提供了一种小型的压电发电装置，其即使在低频下也能产生振动，也能产生电力。 压电发电装置包括形成为螺旋状的压电元件，其中央侧端部固定于第一固定部件，外侧端部固定于第二固定部件。 压电元件包括​​形成为螺旋形并且从一侧向另一侧在压电元件的径向方向上极化的第一压电体。 第一和第二固定构件被布置成使得第二固定构件能够相对于第一固定构件沿切线方向x移动，而第二固定构件被限制为相对于第一固定构件在垂直方向y上的位移。

公开(公告)号：US07579760B2

公开(公告)日：2009-08-25

申请号：US12101227

申请日：2008-04-11

申请人： Katsumi Fujimoto

发明人： Katsumi Fujimoto

IPC分类号： H01L41/08

CPC分类号： G01C19/5663 ,  G01C19/5628 ,  H01L41/0906 ,  H01L41/257

摘要： A vibrator includes a vibrating body having a substantially quadrangular prism shape and including four side surfaces extending in the longitudinal direction of the vibrating body. A common electrode is formed on substantially an entire surface of one of the side surfaces of the vibrating body. Split electrodes extend in the longitudinal direction on another side surface opposite to the side surface on which the common electrode is formed, and are spaced from each other in the width direction of the side surface on which the split electrodes are formed. In the vibrating body, a first polarized section is polarized in a direction from the side surfaces of the vibrating body that do not have an electrode disposed thereon, toward the split electrodes. A second polarized section is polarized in a direction from the side surfaces of the vibrating body that do not have an electrode disposed thereon, toward the common electrode. Thus, the vibrator does not include a joint layer, and is polarized in opposite directions in the thickness direction.

摘要翻译： 振动器包括具有大致四边形棱镜形状并包括在振动体的纵向方向上延伸的四个侧表面的振动体。 公共电极形成在振动体的一个侧表面的基本上整个表面上。 分离电极在与形成有公共电极的侧面相反的另一侧面上沿长度方向延伸，并且在形成有分割电极的侧面的宽度方向上彼此间隔开。 在振动体中，第一极化部在从不具有配置在其上的电极的振动体的侧面朝向分割电极的方向上偏振。 第二偏振部分在从不具有设置在其上的电极的振动体的侧表面朝向公共电极的方向上偏振。 因此，振动器不包括接合层，并且在厚度方向上沿相反方向极化。

公开(公告)号：US06590316B2

公开(公告)日：2003-07-08

申请号：US10027181

申请日：2001-12-26

申请人： Masato Koike ,  Katsumi Fujimoto ,  Nobuyuki Ishitoko

发明人： Masato Koike ,  Katsumi Fujimoto ,  Nobuyuki Ishitoko

IPC分类号： H01L4108

CPC分类号： G01C19/5656

摘要： The present invention provides a piezoelectric vibrator, in which there is no significant change in the characteristics even when depole occurs due to heat shock and the like. The piezoelectric vibrator includes a first piezoelectric substrate having split electrodes formed on one main surface thereof and a second piezoelectric substrate having a common electrode formed on one main surface thereof. The remaining main surfaces of both piezoelectric substrates are bonded to each other via an intermediate electrode. The material of the first piezoelectric substrate differs from the material of the second piezoelectric substrate. As a result, the difference (longitudinal DF) between a resonant frequency and an anti-resonant frequency in a longitudinal vibration of the piezoelectric vibrator substantially coincides with the difference (transverse DF) between a resonant frequency and an anti-resonant frequency in a transverse vibration thereof.

公开(公告)号：US06467347B1

公开(公告)日：2002-10-22

申请号：US09692644

申请日：2000-10-19

申请人： Katsumi Fujimoto

发明人： Katsumi Fujimoto

IPC分类号： G01P904

CPC分类号： G01C19/5649

摘要： A method of detecting an angular velocity including generating a differential signal from a vibrator, the differential signal having a Coriolis force proportional to angular velocity if the vibrator is rotated; generating a timing signal based on the differential signal; and applying the differential signal to a voltage-time converter which, based on the timing signal, converts the differential signal to a pulse train having a duty cycle proportional to the angular velocity. The method is implemented in an angular velocity detector, such as a gyroscope.

摘要翻译： 一种检测角速度的方法，包括产生来自振动器的差分信号，所述差分信号具有与所述振动器旋转时的角速度成比例的科里奥利力; 基于差分信号产生定时信号; 以及将差分信号施加到电压 - 时间转换器，其基于定时信号将差分信号转换成具有与角速度成比例的占空比的脉冲串。 该方法在诸如陀螺仪的角速度检测器中实现。

公开(公告)号：US06201341B1

公开(公告)日：2001-03-13

申请号：US09325141

申请日：1999-06-03

申请人： Katsumi Fujimoto

发明人： Katsumi Fujimoto

IPC分类号： G01C1956

CPC分类号： G01C19/56 ,  G01P2015/084 ,  G01P2015/0842

摘要： A vibrator includes a vibratable body of a flat plate shape and four notches provided from four parts of the outer periphery of said vibrating body with approximately equal intervals to a center of said vibratable body. A vibrating gyroscope includes the vibrator, as well as a drive unit and a detecting unit.

摘要翻译： 振动器包括平板状的可振动体和从所述振动体的外周的四个部分提供的与所述可振动体的中心大致相等间隔的四个凹口。 振动陀螺仪包括振动器，以及驱动单元和检测单元。

公开(公告)号：US5635786A

公开(公告)日：1997-06-03

申请号：US455717

申请日：1995-05-31

申请人： Katsumi Fujimoto ,  Takeshi Nakamura ,  Kazuhiro Ebara ,  Nobuyuki Ishitoko

发明人： Katsumi Fujimoto ,  Takeshi Nakamura ,  Kazuhiro Ebara ,  Nobuyuki Ishitoko

IPC分类号： G01C19/56 ,  G01C19/5649 ,  G01C19/5663 ,  H01L41/08

CPC分类号： G01C19/5642

摘要： A vibrating gyroscope 10 includes a regular quadrangular prism-shaped vibrator 12. The vibrator 12 includes, a first piezoelectric base plate 14a and a second piezoelectric base plate 14b, which are polarized reversely each other in a direction of thickness. On a main surface of the first piezoelectric base plate 14a, two divided electrodes 16, 16 are formed in laterally spaced relationship. On a main surface of the second piezoelectric base plate 14b, a common electrode 18 is formed. Between the first piezoelectric base plate 14a and the second piezoelectric base plate 14b, a dummy electrode 20 is formed. One output terminal of an oscillation circuit 30 as a driving means is connected to the two divided electrodes 16, 16 of the vibrator 12, via resistors 32a and 32b. Another output terminal of the oscillation circuit 30 is connected to the common electrode 18 of the vibrator 12. The two divided electrodes 16, 16 of the vibrator 12 are respectively connected to a non-inverting input terminal and an inverting input terminal of a differential amplifier circuit 36 as a detecting means, via resistors 34a and 34b.

摘要翻译： 振动陀螺仪10包括规则的四边形棱柱形振动器12.振动器12包括在厚度方向上彼此反向偏振的第一压电基板14a和第二压电基板14b。 在第一压电基板14a的主表面上，以横向间隔的关系形成两个分开的电极16,16。 在第二压电基板14b的主表面上形成公共电极18。 在第一压电基板14a和第二压电基板14b之间形成有虚拟电极20。 作为驱动装置的振荡电路30的一个输出端子经由电阻器32a和32b连接到振动器12的两个分割电极16,16。 振荡电路30的另一个输出端子连接到振动器12的公共电极18.振动器12的两个分开的电极16,16分别连接到差分放大器的非反相输入端子和反相输入端子 电路36作为检测装置，通过电阻34a和34b。

公开(公告)号：US5349261A

公开(公告)日：1994-09-20

申请号：US36723

申请日：1993-03-25

申请人： Katsumi Fujimoto ,  Kazuhiro Yoshitani ,  Akira Mori ,  Takeshi Nakamura

发明人： Katsumi Fujimoto ,  Kazuhiro Yoshitani ,  Akira Mori ,  Takeshi Nakamura

IPC分类号： G01C19/5663 ,  H01L41/08

CPC分类号： G01C19/5663

摘要： A vibrator 10 includes a regular triangular prism-shaped vibrating body 12. On centers of three side faces of the vibrating body 12, piezoelectric elements 14a, 14b and 14c are formed, respectively. Two piezoelectric elements and 14b are used for driving and detecting. The other piezoelectric element 14c is used for feedback. By trimming a ledge-line portion 12a of the vibrating body 12, a resonance frequency on driving side is controlled. By trimming ledge-line portions 12b and 12c of the vibrating body 12, two resonance frequencies on detecting side are controlled.

摘要翻译： 振动器10包括正三角形的棱柱形振动体12.在振动体12的三个侧面的中心分别形成压电元件14a，14b和14c。 两个压电元件和14b用于驱动和检测。 另一个压电元件14c用于反馈。 通过修整振动体12的凸缘部分12a，控制驱动侧的共振频率。 通过调整振动体12的凸缘部分12b和12c，控制检测侧的两个谐振频率。