利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

69 条记录 (耗时 0.034 秒)

    Thermometric vapor sensor with evaporation surface having micropores
    32.
    发明授权
    Thermometric vapor sensor with evaporation surface having micropores 有权

    公开(公告)号：US06276196B1

    公开(公告)日：2001-08-21

    申请号：US09733511

    申请日：2000-12-07

    申请人： Ganapati R. Mauze ,  Michael Greenstein ,  Paul Lum ,  Hewlett E. Melton, Jr.

    发明人： Ganapati R. Mauze ,  Michael Greenstein ,  Paul Lum ,  Hewlett E. Melton, Jr.

    IPC分类号： G01N700

    摘要： A sensor for sensing in a gas stream a vapor of a liquid. The sensor includes a micropore and a wet temperature sensor. The micropore has an evaporation end and has a lumen to conduct liquid from a supply of the liquid for evaporation at the evaporation end. The wet temperature sensor has a heat sensitive part in contact with the liquid in the micropore. The heat sensitive part circumscribes the micropore and forms part of the lumen. Heat loss due to evaporation of the liquid when the wet temperature sensor wet with the liquid is placed in the gas stream will result in the temperature sensed by the wet temperature sensor being lower than the non-evaporative temperature of the gas stream. This lowering in temperature can be measured to determine the concentration of the vapor in the gas stream. An example of such a sensor has a thermocouple junction having micropores passing through the thermocouple junction.

    Thermometric vapor sensor with evaporation surface having micropores
    34.
    发明授权
    Thermometric vapor sensor with evaporation surface having micropores 失效
    具有蒸发表面的微孔蒸气传感器具有微孔

    公开(公告)号：US06202480B1

    公开(公告)日：2001-03-20

    申请号：US09054852

    申请日：1998-04-02

    申请人： Ganapati R. Mauze ,  Michael Greenstein ,  Paul Lum ,  Hewlett E. Melton, Jr.

    发明人： Ganapati R. Mauze ,  Michael Greenstein ,  Paul Lum ,  Hewlett E. Melton, Jr.

    IPC分类号： G01N2562

    CPC分类号： G01N25/64

    摘要： A sensor for sensing in a gas stream a vapor of a liquid. The sensor includes a micropore and a wet temperature sensor. The micropore has an evaporation end and has a lumen to conduct liquid from a supply of the liquid for evaporation at the evaporation end. The wet temperature sensor has a heat sensitive part in contact with the liquid in the micropore. The heat sensitive part circumscribes the micropore and forms part of the lumen. Heat loss due to evaporation of the liquid when the wet temperature sensor wet with the liquid is placed in the gas stream will result in the temperature sensed by the wet temperature sensor being lower than the non-evaporative temperature of the gas stream. This lowering in temperature can be measured to determine the concentration of the vapor in the gas stream. An example of such a sensor has a thermocouple junction having micropores passing through the thermocouple junction.

    摘要翻译： 一种传感器，用于在气流中检测液体的蒸汽。 该传感器包括微孔和湿温度传感器。 微孔具有蒸发端，并且具有内腔以在蒸发端从用于蒸发的液体供应源输送液体。 湿式温度传感器具有与微孔中的液体接触的热敏部分。 热敏部分围绕微孔并形成管腔的一部分。 将潮湿的温度传感器用液体湿润时液体的蒸发导致的热损失被放置在气流中将导致由湿式温度传感器感测到的温度低于气流的非蒸发温度。 可以测量这种温度降低以确定气流中的蒸气的浓度。 这种传感器的示例具有热电偶结，其具有穿过热电偶结的微孔。

    Ultrasound diagnostic probe having acoustically driven turbin
    38.
    发明授权
    Ultrasound diagnostic probe having acoustically driven turbin 失效
    超音波诊断探头具有声驱动的涡卷

    公开(公告)号：US5509418A

    公开(公告)日：1996-04-23

    申请号：US373682

    申请日：1995-01-17

    申请人： Paul Lum ,  Michael Greenstein ,  Edward Verdonk

    发明人： Paul Lum ,  Michael Greenstein ,  Edward Verdonk

    IPC分类号： A61B8/12

    CPC分类号： A61B8/12 ,  A61B8/445 ,  A61B8/4461

    摘要： A catheter apparatus for obtaining an image of internal surface characteristics of a vascular vessel is provided. The catheter apparatus comprises an tubular element adapted for insertion into the vascular vessel, a non-rotating acoustic waveguide disposed within the tubular element and coupled to a source of an ultrasonic signal located external to the vascular vessel, and an acoustically driven turbine. The turbine is responsive to the ultrasonic signal for directing the ultrasonic signal in a rotating pattern from a distal end of the acoustic waveguide through the tubular element at an angle relative to an axis of the vascular vessel. The ultrasonic signal includes a low frequency ultrasonic signal and a high frequency ultrasonic signal. The low frequency ultrasonic signal drives the acoustically driven turbine to direct the high frequency ultrasonic signal in the rotating pattern. The acoustically driven turbine comprises a plurality of turbine blades, and either an acoustic reflecting surface or an acoustic refracting lens. At least one transducer disposed external to the vascular vessel provides the source of the high and the low frequency ultrasonic signals. The tubular element may further be provided with a lumen for carrying a guidewire.

    摘要翻译： 提供一种用于获得血管容器的内表面特征的图像的导管装置。 导管装置包括适于插入血管容器的管状元件，设置在管状元件内并连接到位于血管容器外部的超声信号源的非旋转声波导，以及声驱动涡轮。 涡轮机响应于超声波信号，以相对于血管容器轴线成一定角度的方式将超声波信号从声波导管的远端引导通过管状元件。 超声波信号包括低频超声信号和高频超声波信号。 低频超声波信号驱动声驱动涡轮以引导旋转图案中的高频超声波信号。 声驱动涡轮机包括多个涡轮叶片，以及声反射表面或声折射透镜。 设置在血管容器外部的至少一个换能器提供高频和低频超声波信号的源。 管状元件还可以设置有用于承载导丝的内腔。

    Ultrasonic frequency-domain system and method for sensing fluid flow
    39.
    发明授权
    Ultrasonic frequency-domain system and method for sensing fluid flow 失效
    超声频域系统和感应流体流的方法

    公开(公告)号：US5375600A

    公开(公告)日：1994-12-27

    申请号：US104309

    申请日：1993-08-09

    申请人： Hewlett E. Melton, Jr. ,  King-Wah W. Yeung ,  Michael Greenstein

    发明人： Hewlett E. Melton, Jr. ,  King-Wah W. Yeung ,  Michael Greenstein

    IPC分类号： A61B8/06 ,  G01P5/00 ,  G01P13/00 ,  G01S15/58

    CPC分类号： G01S15/8984 ,  A61B8/06 ,  A61B8/488 ,  G01S15/582

    摘要： Pulses of ultrasound are focused in the patient's body to create an interrogation volume where a characteristic of blood flow is to be measured. The bandwidth of the back-scattered Doppler return signal is measured. In order to measure flow velocity independent of direction, the interrogation volume is generated substantially as a sphere in which the range dimension is set equal to the lateral dimensions (azimuth and elevation) of the interrogation signal. The Doppler bandwidth is then scaled to provide a direction-independent measurement of flow velocity. In order to determine the direction of flow, the interrogation volume is generated substantially as an ellipsoid. The long axis of the ellipsoidal interrogation volume is then rotated until the measured Doppler bandwidth is at a minimum, which is reached when the long axis is aligned with the flow direction. The interrogation volume is preferably rotated and translated using differential phasing of the ultrasonic signals from different transducer elements in a two-dimensional array.

    摘要翻译： 超声波的脉冲聚焦在患者的身体中以产生要测量血流特征的询问体积。 测量背散射多普勒返回信号的带宽。 为了独立于方向测量流速，询问体积基本上产生为范围尺寸设置为等于询问信号的横向尺寸（方位角和仰角）的球体。 然后缩放多普勒带宽以提供流速独立的方向测量。 为了确定流动的方向，询问体积基本上产生为椭圆体。 然后旋转椭圆询问体积的长轴直到测量的多普勒带宽处于最小值，当长轴与流动方向对准时达到最小。 询问体积优选地以二维阵列使用来自不同换能器元件的超声波信号的微分相位来旋转和平移。

    Signal conditioning and interconnection for an acoustic transducer
    40.
    发明授权
    Signal conditioning and interconnection for an acoustic transducer 失效
    声换能器的信号调理和互连

    公开(公告)号：US5329498A

    公开(公告)日：1994-07-12

    申请号：US62665

    申请日：1993-05-17

    申请人： Michael Greenstein

    发明人： Michael Greenstein

    IPC分类号： A61B8/00 ,  B06B1/06 ,  H01L41/08 ,  H04R3/00 ,  H04R17/00

    CPC分类号： B06B1/0629

    摘要： An ultrasonic device having an acoustic transducer with a lamination of parallel integrated circuit chips having active circuitry. A backing member made of a material for attenuating acoustic waves provides Z-axis conduction of signals from the parallel integrated circuit chips to individual piezoelectric elements. Preferably, each piezoelectric element is operatively associated with a particular circuit that is within the acoustic shadow of the element, so that the lamination of chips does not add to the cross sectional area of the transducer. The integrated circuit chips are coterminus at first edges to provide a planar contact surface having a pad grid array of contact pads for connection with conductors extending through the backing member. In one embodiment, the piezoelectric elements provide a two-dimensional array of elements that corresponds to the pad grid array. Circuitry on the integrated circuit chips can include protective diodes, preamplifiers and one or more multiplexers.

    摘要翻译： 一种具有声学换能器的超声波装置，其具有具有有源电路的并联集成电路芯片的叠层。 由用于衰减声波的材料制成的背衬构件将来自并联集成电路芯片的信号的Z轴导通到各个压电元件。 优选地，每个压电元件与位于元件的声阴内的特定电路可操作地相关联，使得芯片的层叠不会增加换能器的横截面积。 集成电路芯片在第一边缘处是邻接的，以提供具有用于与延伸穿过背衬构件的导体连接的接触垫的焊盘格栅阵列的平面接触表面。 在一个实施例中，压电元件提供对应于焊盘格栅阵列的元件的二维阵列。 集成电路芯片上的电路可以包括保护二极管，前置放大器和一个或多个多路复用器。