公开(公告)号：US08354775B2

公开(公告)日：2013-01-15

申请号：US12889457

申请日：2010-09-24

申请人： Junichi Nishie ,  Takaaki Asada ,  Mio Furuya ,  Takayuki Shimamoto ,  Kazuhiro Ebara

发明人： Junichi Nishie ,  Takaaki Asada ,  Mio Furuya ,  Takayuki Shimamoto ,  Kazuhiro Ebara

IPC分类号： H01L41/08

CPC分类号： G10K9/122

摘要： An ultrasonic transducer includes a case, a reflective portion, and a piezoelectric body. The case has a substantially cylindrical shape including one closed end in the center axis direction that defines a top. The piezoelectric body is disposed on the inner surface of the top of the case. The reflective portion is arranged to oppose and be spaced apart from the piezoelectric body. The distance between the piezoelectric body and the reflective portion is greater than the maximum displacement of the piezoelectric body and is substantially an odd number multiple of a ¼ wavelength of sound waves or less than or equal to the ¼ wavelength.

摘要翻译： 超声换能器包括壳体，反射部分和压电体。 壳体具有基本上圆柱形的形状，包括限定顶部的中心轴线方向上的一个封闭端。 压电体设置在壳体顶部的内表面上。 反射部分被布置成与压电体相对并间隔开。 压电体和反射部之间的距离大于压电体的最大位移，并且基本上是声波的1/4波长或小于或等于1/4波长的奇数倍。

公开(公告)号：US07692367B2

公开(公告)日：2010-04-06

申请号：US12467361

申请日：2009-05-18

申请人： Hiroyuki Hirano ,  Takaaki Asada ,  Mio Furuya ,  Junichi Nishie

发明人： Hiroyuki Hirano ,  Takaaki Asada ,  Mio Furuya ,  Junichi Nishie

IPC分类号： H01L41/053

CPC分类号： G10K9/22 ,  H04R17/00

摘要： A piezoelectric device is attached to an inner bottom surface of the outer case having a tubular shape including a bottom, and an inner case is disposed within the outer case. In an ultrasonic vibration acting surface of the inner case that is arranged to face the bottom surface of the outer case, a mass of the inner case is arranged to restrain vibration of the outer case, which is generated by the piezoelectric device. A first cutout is provided in a portion of the ultrasonic vibration acting surface and arranged to face the piezoelectric device so as to flatten an ultrasonic beam generated by vibrations of the piezoelectric device and the outer case. Second cutouts are provided at locations on the ultrasonic vibration acting surface spaced away from the first cutout in a line symmetrical relationship with a long axis of the first cutout defining a symmetrical axis.

摘要翻译： 压电装置附接到具有包括底部的管状形状的外壳的内底表面，并且内壳设置在外壳内。 在内壳的配置成面向外壳的底面的超声波振动作用面中，内壳的质量被配置为抑制由压电元件产生的外壳的振动。 第一切口设置在超声波振动作用面的一部分上，并配置为面对压电装置，以使由压电装置和外壳振动产生的超声波束变平。 第二切口设置在与限定对称轴线的第一切口的长轴线对称关系的与第一切口间隔开的超声波振动作用面上的位置处。

公开(公告)号：US07737609B2

公开(公告)日：2010-06-15

申请号：US12425548

申请日：2009-04-17

申请人： Koji Murata ,  Masato Kotani ,  Takaaki Asada ,  Takayuki Shimamoto ,  Hiroyuki Hirano ,  Mio Furuya

发明人： Koji Murata ,  Masato Kotani ,  Takaaki Asada ,  Takayuki Shimamoto ,  Hiroyuki Hirano ,  Mio Furuya

IPC分类号： H01L41/08 ,  H04R17/00

CPC分类号： G10K9/122 ,  G01S7/521 ,  G01S15/931 ,  G10K9/22

摘要： An ultrasonic sensor includes a cylindrical outer case with a bottom and a piezoelectric element fixed to the inner side of the bottom portion of the outer case. A ring-shaped inner case having a central hole extending in the axial direction in the central portion thereof is disposed inside the sidewall portion of the outer case. A flat or substantially flat portion is provided around the central hole of the inner case, and a viscoelastic filler is arranged so as to extend from the central hole to the flat or substantially flat portion of the inner case. A tabular member is disposed on the flat or substantially flat portion so as to face the flat or substantially flat portion with the filler interposed therebetween. When the inner case vibrates, shear deformation occurs in the filler interposed between the flat or substantially flat portion and the tabular member since the tabular member is not substantially deformed, and the vibration is reduced by the viscoelastic damping effect.

摘要翻译： 超声波传感器包括具有底部的圆柱形外壳和固定到外壳的底部的内侧的压电元件。 具有在其中心部分沿轴向延伸的中心孔的环形内壳设置在外壳的侧壁部分的内侧。 在内壳的中心孔周围设置平坦或基本上平坦的部分，并且粘弹性填料被布置成从中心孔延伸到内壳的平坦或基本上平坦的部分。 板状构件设置在平坦或基本上平坦的部分上，以便面对平坦或基本上平坦的部分，填充物插入其间。 当内壳体振动时，由于平板状构件基本上不变形，插入在平坦部分或基本上平坦的部分之间的填料中产生剪切变形，并且通过粘弹性阻尼效应减小了振动。

公开(公告)号：US07548014B2

公开(公告)日：2009-06-16

申请号：US12103912

申请日：2008-04-16

申请人： Takaaki Asada ,  Takayuki Shimamoto ,  Koji Murata ,  Mio Furuya

发明人： Takaaki Asada ,  Takayuki Shimamoto ,  Koji Murata ,  Mio Furuya

IPC分类号： H01L41/08

CPC分类号： G10K9/122 ,  G01S7/521 ,  G01S15/931 ,  G01S2015/938 ,  G10K9/22

摘要： An ultrasonic transducer includes a cylindrical cap member having a bottom. A piezoelectric element is bonded to the inner side of a bottom portion of the cap member using a conductive adhesive or other suitable adhesive. An inner frame made of a material having an acoustic impedance greater than that of the cap member is fitted into the cap member so as to be in contact with a side portion, including the end portion, of the cap member. Through-holes are provided in the side portion of the inner frame. Lead wires are connected to the piezoelectric element and the inner frame, respectively. A sound absorber and a damper are inserted into the inner frame. The damper is in direct contact with the side portion of the cap member via the through-holes of the inner frame.

摘要翻译： 超声波换能器包括具有底部的圆柱形盖构件。 使用导电粘合剂或其它合适的粘合剂将压电元件结合到盖构件的底部的内侧。 由具有大于盖构件的声阻抗的材料制成的内框架被装配到盖构件中以便与帽构件的包括端部的侧部接触。 在内框架的侧部设有通孔。 引线分别连接到压电元件和内框架。 吸音器和阻尼器插入到内框架中。 阻尼器经由内框架的通孔与盖构件的侧部直接接触。

公开(公告)号：US08414500B2

公开(公告)日：2013-04-09

申请号：US12784103

申请日：2010-05-20

申请人： Mami Matsukawa ,  Yoshiaki Watanabe ,  Masashi Saito ,  Takaaki Asada ,  Mio Furuya

发明人： Mami Matsukawa ,  Yoshiaki Watanabe ,  Masashi Saito ,  Takaaki Asada ,  Mio Furuya

IPC分类号： A61B5/0402

CPC分类号： A61B7/04 ,  A61B5/02007 ,  A61B5/0285

摘要： An arteriosclerosis diagnostic device according to various embodiments is a simple device, resistant to an external factor, such as an error resulting from a skin surface, and capable of measuring the degree of hardness of an artery. The arteriosclerosis diagnostic device detects a heart sound and a pulse wave at least one location of a living body, the pulse wave propagating through an artery in relation to the heart sound, converts detected signals thereof into respective frequency signals, specifies the peak frequency of each of the frequency signals, and determines the degree of arteriosclerosis on the basis of the difference between the peak frequency of the heart sound and the peak frequency of the pulse wave. Accordingly, the degree of arteriosclerosis can be determined by comparison between the frequency signals.

摘要翻译： 根据各种实施方式的动脉硬化症诊断装置是能够抵抗外部因素的简单装置，例如由皮肤表面产生的误差，并且能够测量动脉的硬度。 动脉硬化诊断装置通过与心脏声音相关的动脉传播的脉搏波将检测到的信号转换成各自的频率信号，来确定生物体的至少一个位置的心脏声音和脉搏波，将各个频率信号的峰值频率 的频率信号，并且基于心音的峰值频率与脉搏波的峰值频率之间的差来确定动脉硬化的程度。 因此，可以通过频率信号之间的比较来确定动脉硬化的程度。

公开(公告)号：US08696580B2

公开(公告)日：2014-04-15

申请号：US13037028

申请日：2011-02-28

申请人： Mami Matsukawa ,  Yoshiaki Watanabe ,  Masashi Saito ,  Takaaki Asada ,  Mio Furuya

发明人： Mami Matsukawa ,  Yoshiaki Watanabe ,  Masashi Saito ,  Takaaki Asada ,  Mio Furuya

IPC分类号： A61B5/02

CPC分类号： A61B5/0285 ,  A61B5/02007 ,  A61B5/6822 ,  A61B8/06

摘要： The disclosed is an arteriosclerosis evaluating apparatus capable of easily separating pulse wave data detected at one measurement site into an incident wave and a reflected wave and capable of easily determining and evaluating the degree of arteriosclerosis. The pulse wave transmitted through an artery is detected at one site of a living body by a pulse wave detection device, and the detected pulse wave is fitted with a fitting function by a breakdown device so that the detected pulse wave can be broken down into an incident wave and a reflected wave. The degree of arteriosclerosis is evaluated from the amplitude intensities (i.e., peak intensities) of the incident wave and the reflected wave broken down from the pulse wave.

摘要翻译： 所公开的是一种动脉硬化评估装置，其能够容易地将在一个测量部位检测到的脉波数据分离成入射波和反射波，并且能够容易地确定和评估动脉硬化程度。 通过脉搏检测装置在生物体的一个位置处检测到通过动脉传递的脉波，并且通过击穿装置将检测出的脉搏波装配到拟合功能，使得检测出的脉波可以分解为 入射波和反射波。 从入射波的振幅强度（即峰值强度）和从脉搏波分解的反射波来评价动脉硬化的程度。

公开(公告)号：US07388317B2

公开(公告)日：2008-06-17

申请号：US10788203

申请日：2004-02-27

申请人： Takaaki Asada ,  Akiteru Takatsuka

发明人： Takaaki Asada ,  Akiteru Takatsuka

IPC分类号： H01L41/08

CPC分类号： G01H5/00

摘要： An ultrasonic transmitting/receiving device that effectively suppresses ringing during emission of ultrasonic waves and improves time resolution when measuring a sonic velocity includes a pair of ultrasonic transducers. Each of the ultrasonic transducers has a piezoelectric vibrator including a first electrode and a second electrode that are separated by a piezoelectric body and a backing disposed in contact with the first electrode and composed of the same material as a material of the piezoelectric body. The ultrasonic transducers are connected by a support so as to face each other and have a substantially rectangular U-shape as a whole when viewed from the side.

摘要翻译： 一种超声波发射/接收装置，其在发射超声波时有效地抑制振铃并且在测量声速时提高时间分辨率包括一对超声换能器。 每个超声波换能器都具有压电振子，该压电振动器包括由压电体隔开的第一电极和第二电极以及与第一电极接触并由与压电体的材料相同的材料构成的背衬。 超声波换能器通过支撑体相互连接，从侧面观察时整体上呈大致矩形的U字形状。

公开(公告)号：US06498434B2

公开(公告)日：2002-12-24

申请号：US09836076

申请日：2001-04-17

申请人： Akiteru Takatsuka ,  Takaaki Asada

发明人： Akiteru Takatsuka ,  Takaaki Asada

IPC分类号： H01J1346

CPC分类号： H01L41/107 ,  H05B41/2822 ,  H05B41/36

摘要： A piezoelectric transformer includes a piezoelectric unit. The piezoelectric unit includes a plurality of driver units divided by at least one groove extending in the longitudinal direction of the piezoelectric unit from one end thereof, and also includes a plurality of generator units, opposing the driver units, divided by at least one groove extending in the longitudinal direction of the piezoelectric unit from the other end thereof. Opposing pairs of the driver units and the generator units constitute a plurality of transformer units. The transformer units differ in length from one another.

摘要翻译： 压电变压器包括压电单元。 所述压电单元包括多个驱动单元，所述多个驱动器单元由至少一个沿所述压电单元的纵向方向从其一端延伸的凹槽分隔开，并且还包括与所述驱动单元相对的多个发电机单元，所述多个发电机单元被至少一个凹槽延伸 在压电单元的另一端的纵向方向上。 驱动单元和发电机单元的相对对构成多个变压器单元。 变压器单元的长度彼此不同。

公开(公告)号：US07638924B2

公开(公告)日：2009-12-29

申请号：US10595518

申请日：2005-03-29

申请人： Takaaki Asada ,  Seiichi Morita

发明人： Takaaki Asada ,  Seiichi Morita

IPC分类号： H01L41/08

CPC分类号： G01N29/345 ,  G01N29/07 ,  G01N29/245 ,  G01N29/32 ,  G01N29/343 ,  G01N2291/02836 ,  G01N2291/02881 ,  G01N2291/0423

摘要： An ultrasonic transducer includes a piezoelectric resonator including a pair of electrodes sandwiching a piezoelectric body and provided with the backing layer in contact with one of the electrodes of the piezoelectric resonator and having the same acoustic characteristic impedance as the piezoelectric body. A method includes the step of driving the ultrasonic transducer so as to satisfy a condition: 2Th≦Td≦6Th where Th is a propagation time of an ultrasonic wave in the piezoelectric body sandwiched by the pair of electrodes, and Td is a pulse width of a drive pulse driving the piezoelectric resonator.

摘要翻译： 超声换能器包括压电谐振器，该压电谐振器包括夹着压电体的一对电极，并且设置有与压电谐振器的一个电极接触的背衬层，并具有与压电体相同的声学特性阻抗。 一种方法包括驱动超声波换能器以满足条件：2Th <= Td <= 6Th的步骤，其中Th是由一对电极夹在压电体中的超声波的传播时间，Td是脉冲 驱动压电谐振器的驱动脉冲的宽度。

公开(公告)号：US06229251B1

公开(公告)日：2001-05-08

申请号：US09268550

申请日：1999-03-15

申请人： Takaaki Asada ,  Akiteru Takatsuka ,  Toshiaki Kaji

发明人： Takaaki Asada ,  Akiteru Takatsuka ,  Toshiaki Kaji

IPC分类号： H01L4108

CPC分类号： H01L41/107

摘要： A monolithic piezoelectric transformer includes a piezoelectric substrate and input electrodes which include internal electrodes disposed in the piezoelectric substrate alternately and between piezoelectric ceramic layers and external electrodes provided on the corresponding upper and lower surfaces of the piezoelectric substrate. The length of the external electrodes is about 50% of an overall length L of the piezoelectric substrate. The length of the internal electrodes is longer than approximately 50% of the overall length L.

摘要翻译： 单片式压电变压器包括压电基板和输入电极，输入电极包括交替设置在压电基片内的压电陶瓷层和设置在压电基板的相应上表面和下表面上的外部电极之间的内部电极。 外部电极的长度为压电基板的总长度L的约50％。 内部电极的长度大于总长度L的约50％。