-
公开(公告)号：US5438554A
公开(公告)日：1995-08-01
申请号：US203216
申请日：1994-02-28
CPC分类号： G10K11/02 , B06B1/0622
摘要： A tunable ultrasonic probe includes a body of a first piezoelectric material acoustically coupled in series with a body of a second piezoelectric material. The second piezoelectric material has a Curie temperature that is substantially different than that of the first piezoelectric material. Preferably, the first piezoelectric material is a conventional piezoelectric ceramic, such as lead zirconate titanate, while the second piezoelectric material is a relaxor ferroelectric ceramic, such as lead magnesium niobate. At an operating temperature of the probe, the first piezoelectric material has a fixed polarization. In contrast, the second piezoelectric material has a polarization that is variable relative to the fixed polarization of the first piezoelectric material. A preferred novel arrangement of electrodes electrically couples the bodies in parallel with one another. An oscillating voltage for exciting the acoustic signals in the probe is coupled with the electrodes. The polarization of the second piezoelectric material is variably controlled by a bias voltage coupled with the electrodes. In a preferred embodiment, the bias voltage has a reversible electrical polarity for selecting one resonant frequency from a plurality of resonant frequencies of the probe. In another preferred embodiment, the bias voltage source has a variable voltage level for selecting at least one of a plurality of resonant frequencies of the probe.
摘要翻译： 可调谐超声波探头包括与第二压电材料的主体串联耦合的第一压电材料的主体。 第二压电材料具有与第一压电材料基本不同的居里温度。 优选地，第一压电材料是诸如锆钛酸铅的常规压电陶瓷，而第二压电材料是诸如铌酸铅镁之类的弛豫铁电陶瓷。 在探针的工作温度下，第一压电材料具有固定的极化。 相反，第二压电材料具有相对于第一压电材料的固定极化可变的极化。 电极的优选新颖布置使得主体彼此平行地电耦合。 用于激发探针中的声信号的振荡电压与电极耦合。 第二压电材料的极化可通过与电极耦合的偏置电压来可变地控制。 在优选实施例中，偏置电压具有可逆的电极性，用于从探头的多个谐振频率中选择一个谐振频率。 在另一个优选实施例中，偏置电压源具有用于选择探头的多个谐振频率中的至少一个的可变电压电平。
-
公开(公告)号：US5485845A
公开(公告)日：1996-01-23
申请号：US434616
申请日：1995-05-04
CPC分类号： A61B8/12 , A61B8/445 , A61B8/4461 , G01S15/74 , G01S15/874 , G01S15/8943 , A61B2090/3929 , G01S5/24
摘要： An ultrasound system and method for intravascular ultrasonic imaging includes an array of beacons that are fixed to direct ultrasonic energy toward an imaging transducer, with individual beacons being identifiable in order to determine the angular position of the imaging transducer. Based upon the data related to beacon identification, operation of the imaging device is adaptively adjusted in order to compensate for variations in angular velocity of the transducer. Adaptive compensation may be performed by adjusting the pulse repetition rate of transmitted ultrasonic energy, by adjusting the scan conversion algorithm or mapping reflected ultrasonic energy, or by varying control of the drive structure for rotating the transducer. The beacons are preferably piezoelectrically active, but passive beacons may also be used. Position identification may be performed by techniques including amplitude sensing, phase sensing, pulse length sensing, and frequency sensing. As an alternative to rotation of the transducer, ultrasonic signals may be formed at a proximal end of a probe and then conducting the energy to the distal end via a waveguide.
摘要翻译： 用于血管内超声成像的超声系统和方法包括固定以朝向成像换能器直接超声能量的信标阵列，其中各个信标是可识别的，以便确定成像换能器的角位置。 基于与信标识别相关的数据，自适应地调整成像装置的操作，以补偿换能器的角速度的变化。 可以通过调整扫描转换算法或映射反射的超声能量，或者通过改变用于旋转传感器的驱动结构的控制来调节发射的超声能量的脉冲重复率来执行自适应补偿。 信标优选地是压电有源的，但也可以使用被动信标。 可以通过包括幅度感测，相位感测，脉冲长度感测和频率感测的技术来执行位置识别。 作为换能器旋转的替代方案，可以在探针的近端处形成超声波信号，然后经由波导将能量传导到远端。
-
公开(公告)号：US5396143A
公开(公告)日：1995-03-07
申请号：US246593
申请日：1994-05-20
CPC分类号： B06B1/06 , B06B1/0622 , H04R17/08
摘要： An ultrasonic transducer for controlling an elevation aperture utilizes the electric field-induced polarization properties of relaxor ferroelectric materials. The Curie temperature of the material is typically close to room temperature, so that the application of a bias voltage provides piezoelectric activity. By varying the thickness of a dielectric layer that spaces apart the relaxor ferroelectric material from an electrode or providing the bias voltage, the piezoelectric activity can be tailored. That is, degrees of polarization of the relaxor ferroelectric material are varied spatially in correspondence with changes in thickness of the dielectric layer. The effective elevation aperture of the transducer can be varied by adjusting the bias voltage.
摘要翻译： 用于控制仰角孔的超声换能器利用了弛豫铁电材料的电场诱导极化特性。 材料的居里温度通常接近室温，因此施加偏置电压提供压电活性。 通过改变将弛豫铁电体材料与电极隔开或提供偏置电压的电介质层的厚度，可以调整压电活性。 也就是说，弛豫铁电材料的偏振度根据电介质层的厚度的变化在空间上变化。 可以通过调整偏置电压来改变传感器的有效仰角孔径。
-
公开(公告)号：US5638822A
公开(公告)日：1997-06-17
申请号：US497238
申请日：1995-06-30
CPC分类号： G10K11/02 , B06B1/0607 , B06B1/067
摘要： An ultrasonic probe for coupling acoustic signals between the probe and a medium is provided. The ultrasonic probe has a piezoelectric element having a plurality of piezoelectric layers each having a different acoustic impedance. The piezoelectric layers are stacked in progressive order of acoustic impedance such that the layer with the acoustic impedance nearest to that of the medium is proximate the medium. At least one of said piezoelectric layers is made of piezoelectric composite material. The ultrasonic probe further has an electrode means for electrically coupling the piezoelectric layers to a voltage source for applying an oscillation voltage potential to each piezoelectric layer. The probe further has a control means for controlling the polarization of at least one of the piezoelectric layers.
摘要翻译： 提供用于耦合探针和介质之间的声信号的超声波探头。 超声波探头具有压电元件，该压电元件具有各自具有不同声阻抗的多个压电层。 压电层以声阻抗的渐进顺序堆叠，使得具有最接近介质的声阻抗的层接近介质。 所述压电层中的至少一个由压电复合材料制成。 超声波探头还具有用于将压电层电耦合到电压源的电极装置，用于向每个压电层施加振荡电压电位。 探头还具有用于控制至少一个压电层的极化的控制装置。
-
5.发明授权Method for fabricating a Z-axis conductive backing layer for acoustic transducers using etched leadframes 失效用于使用蚀刻引线框架制造用于声学换能器的Z轴导电背衬层的方法
公开(公告)号：US5592730A
公开(公告)日：1997-01-14
申请号：US283136
申请日：1994-07-29
申请人： Michael Greenstein , Henry Yoshida
发明人： Michael Greenstein , Henry Yoshida
CPC分类号： B06B1/0622 , Y10T29/42 , Y10T29/49005 , Y10T29/49121
摘要： A Z-axis backing layer for an acoustic transducer is provided, which comprises a matrix of electrical conductors disposed in parallel and potted within an electrically insulating acoustic backing material. The acoustic transducers are disposed on a first end of the backing layer, with each individual transducer element connecting electrically to a respective one of the conductors. At the other end of the backing layer, the conductors connect electrically to a corresponding circuit element. The backing layer is fabricated from a plurality of leadframes each having an outer frame member and a plurality of conductors extending in parallel across the leadframes terminating at the frame members at opposite ends thereof. The plurality of leadframes are stacked such that respective conductors of adjacent ones of the leadframes are disposed in parallel with a space provided between the respective conductors equivalent to a width of one of the leadframes. Acoustic backing material is poured onto the stacked plurality of leadframes to completely fill the spaces between conductors. The frame members and excess acoustic backing material are then removed from the stacked and poured plurality of leadframes.
摘要翻译： 提供了一种用于声学换能器的Z轴背衬层，其包括平行放置并封装在电绝缘声学背衬材料内的电导体矩阵。 声学传感器设置在背衬层的第一端上，每个单独的换能器元件电连接到相应的导体之一。 在背衬层的另一端，电导体与相应的电路元件电连接。 背衬层由多个引线框架制成，每个引线框架具有外框架构件和多个导体，跨过引线框架并联延伸，终端于框架构件的相对端。 多个引线框架被堆叠，使得相邻的引线框架的各个导体与设置在相当于引线框之一的宽度的各个导体之间的空间平行设置。 声学衬垫材料被倒在堆叠的多个引线框架上以完全填充导体之间的空间。 然后将框架构件和多余的声学衬垫材料从堆叠和倒入的多个引线框架中移除。
-
公开(公告)号：US08496875B2
公开(公告)日：2013-07-30
申请号：US11133943
申请日：2005-05-20
IPC分类号： G01N21/00
CPC分类号： G01N35/00584 , B01L3/5027 , B01L3/502715 , B01L9/527 , B01L2300/0819 , G01N21/05 , G01N21/11 , G01N21/13 , G01N35/04 , G01N35/1095 , G01N2021/0346 , G01N2021/058
摘要： The present invention is an automated microfluidic chip processing apparatus that includes a deck for holding at least one microfluidic chip and capable of being accessed by a liquid handling system, a fluid control system, and a detection system, wherein a chip handling device transports the chip from the deck to the fluid control system and the detection system. The present invention also includes a chip for use with an automated microfluidic chip processing apparatus, and a method for processing a microfluidic chip using such an apparatus.
-
公开(公告)号：US07575558B2
公开(公告)日：2009-08-18
申请号：US10892874
申请日：2004-07-16
IPC分类号： A61B5/00
CPC分类号： A61M5/142 , A61B5/0002 , A61B5/145 , A61B5/14532 , A61B5/150022 , A61B5/150221 , A61B5/150412 , A61B5/150503 , A61B5/150755 , A61B5/150854 , A61B5/15113 , A61B5/15117 , A61B5/15121 , A61B5/15123 , A61B5/1519 , A61M2205/3576 , G06F19/00 , H04L67/025 , H04L67/1097 , H04L67/12 , Y10S128/903
摘要： A portable medical analyzer comprising a sampling module with a sample port for receiving body fluid, an assay sensor module for analysis of the body fluid, an analytical detector module with detection of information from the assay, and a communications module for transferring the information to a remote location via a wired or wireless network.
摘要翻译： 一种便携式医学分析仪，包括具有用于接收体液的采样端口的采样模块，用于分析体液的测定传感器模块，具有来自测定的信息检测的分析检测器模块，以及用于将信息传送到 通过有线或无线网络进行远程位置。
-
公开(公告)号：US07055695B2
公开(公告)日：2006-06-06
申请号：US10449517
申请日：2003-06-02
申请人： Michael Greenstein , Colin B Kennedy , Huan L Phan , Stephan Bianchi , Jonathan R Harris , Daren W Hebold , Robert A Howard , Andrew L Zee
发明人： Michael Greenstein , Colin B Kennedy , Huan L Phan , Stephan Bianchi , Jonathan R Harris , Daren W Hebold , Robert A Howard , Andrew L Zee
IPC分类号： B65D85/00
CPC分类号： B01L9/527 , B01L2200/025 , B01L2200/0689 , B01L2200/185 , B01L2300/041 , B65D85/70
摘要： A container is provided for shipping and storing a pre-wetted and pre-conditioned microfluidic “sipper” chip. The container contains both dry compartments and wet compartments. A base contains a fluid-filled reservoir configured to house the capillaries. The opening of the reservoir is sealed with an O-ring. The plastic mount of the chip rests on the base in a dry compartment. The upper surface of the chip contains several wells containing fluid. A gasket is provided with plugs configured to be disposed within and seal the wells. Alternatively, the wells are first sealed with a foil film adhered to the well openings with an adhesive and a gasket is disposed between the foil and a cover, which is removably attached to the base. When the cover is closed, the gasket and O-ring seal the wet compartments to prevent leakage and to slow evaporation.
-
公开(公告)号：US06660018B2
公开(公告)日：2003-12-09
申请号：US09846139
申请日：2001-04-30
IPC分类号： A61B1714
CPC分类号： A61B5/150977 , A61B5/150022 , A61B5/150068 , A61B5/150099 , A61B5/150396 , A61B5/150427 , A61B5/15142 , A61B5/157 , A61B17/205
摘要： A device for puncturing the skin of a patient. The device includes first and second protrusions, each protrusion puncturing the skin when pressed against the skin. The first and second protrusions are arranged such that the first protrusion punctures the skin at a location less than a predetermined distance from the second protrusion. The distance is chosen to be less than the discriminatable distance between distinct pain perception points in the patient, such that the patient perceives a single puncture when the first and second protrusions puncture the skin. In one embodiment of the invention, the device includes a base lip that applies a lateral force to the skin when the base lip is pressed against the skin. In this embodiment, the protrusions are pressed into the skin as the base lip is pressed against the skin.
摘要翻译： 一种用于刺穿患者皮肤的装置。 该装置包括第一和第二突起，每个突出部在压靠皮肤时刺入皮肤。 第一突起和第二突起被布置成使得第一突起在距离第二突起小于预定距离的位置刺穿皮肤。 该距离选择为小于患者中不同疼痛感知点之间的可区分距离，使得当第一和第二突起刺穿皮肤时，患者感知到单次穿刺。 在本发明的一个实施例中，所述装置包括基底唇部，当基底唇被压靠在皮肤上时，所述基部唇缘向皮肤施加横向力。 在该实施例中，当基底唇被压在皮肤上时，突起被压入皮肤。
-
公开(公告)号：US06171325B2
公开(公告)日：2001-01-09
申请号：US09420988
申请日：1999-10-20
IPC分类号： A61B1732
CPC分类号： A61B10/0233 , A61B5/14514 , A61B5/150022 , A61B5/150137 , A61B5/15016 , A61B5/150396 , A61B5/150419 , A61B5/150427 , A61B5/150511 , A61B5/15121 , A61B5/15142 , A61B10/0266 , A61B17/32002 , A61B17/32053 , A61B17/32093 , A61B17/3476
摘要： A multi-shaft apparatus for incising a substrate of soft resilient material such as a body tissue. The incising apparatus includes two or more incision shafts each having a distal edge. The shafts are not affixed to each other and are allowed to slide against each other to drive the distal edges alternately against the substrate to incise the substrate. In the case of incising a body tissue, such alternate motion would result in less pain to the patient than a puncture resulting from a sharp jab by a sharp shaft of similar size to the shafts.
-
-
-
-
-
-
-
-
-
搜索结果
69 条记录 (耗时 0.025 秒)