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    Correction of a pressure indication in a pressure transducer due to variations of an environmental condition
    3.
    发明授权
    Correction of a pressure indication in a pressure transducer due to variations of an environmental condition 失效
    由于环境条件的变化，校正压力传感器中的压力指示

    公开(公告)号：US5329818A

    公开(公告)日：1994-07-19

    申请号：US890627

    申请日：1992-05-28

    申请人： Roger L. Frick ,  Gregory S. Munson

    发明人： Roger L. Frick ,  Gregory S. Munson

    IPC分类号： G01L9/00 ,  G01L9/06 ,  G01L9/12 ,  G01L13/06 ,  G01L19/00 ,  G01L19/02 ,  G01L19/04 ,  G01L19/08 ,  G01L27/00

    CPC分类号： G01L27/005 ,  G01L19/02 ,  G01L9/065 ,  G01L9/125

    摘要： A two-wire transmitter includes a pressure sensor comprising first and second sensing means each having an impedance value which varies with pressure being measured and with a predetermined environmental condition, such as line pressure or temperature. A fixed impedance has an impedance value which is substantially unchanged by variations in the predetermined environmental condition. A switch alternately connects the fixed impedance into operative relation with the first and second sensing means to derive first and second signals which are each functions of pressure being measured and the predetermined environmental condition. A correction circuit processes the first and second signals, such as by a polynomial series or with a lookup table, to derive a corrected pressure signal. In one form, the sensor senses differential pressure and the predetermined environmental condition is line pressure or temperature, and the first and second signals are functions of both differential pressure and either line pressure or temperature, so the correction circuit derives an indication of differential pressure corrected for variations in either line pressure or temperature. In another form, the sensor measures line pressure and is sensitive to temperature changes, in which case the first and second signals are functions of line pressure and temperature and the correction circuit derives a line pressure signal corrected for variations in temperature.

    摘要翻译： 双线发射器包括压力传感器，该压力传感器包括第一和第二感测装置，每个具有阻抗值，该阻抗值随着被测量的压力和预定的环境条件（例如管路压力或温度）而变化。 固定阻抗具有通过预定环境条件的变化基本上不变的阻抗值。 开关将固定阻抗交替地连接到与第一和第二感测装置的操作关系，以导出作为被测量的压力和预定环境条件的每个功能的第一和第二信号。 校正电路例如通过多项式串联或查找表处理第一和第二信号，以导出校正的压力信号。 在一种形式中，传感器感测差压，并且预定的环境条件是线路压力或温度，并且第一和第二信号是压差和线路压力或温度两者的函数，因此校正电路导出校正的差压指示 对于管路压力或温度的变化。 在另一种形式中，传感器测量线路压力并且对温度变化敏感，在这种情况下，第一和第二信号是线路压力和温度的函数，并且校正电路导出根据温度变化校正的线路压力信号。

    Reforming wet-tantalum capacitors in implantable medical devices
    4.
    发明授权
    Reforming wet-tantalum capacitors in implantable medical devices 有权

    公开(公告)号：US07131988B2

    公开(公告)日：2006-11-07

    申请号：US10801315

    申请日：2004-03-16

    申请人： Robert S. Harguth ,  Ron A. Balczewski ,  William J. Linder ,  Gregory S. Munson ,  Michael W. Paris

    发明人： Robert S. Harguth ,  Ron A. Balczewski ,  William J. Linder ,  Gregory S. Munson ,  Michael W. Paris

    IPC分类号： A61N1/00

    CPC分类号： H01G9/042 ,  A61N1/3956

    摘要： Miniature defibrillators and cardioverters detect abnormal heart rhythms and automatically apply electrical therapy to restore normal heart function. Critical to this function, aluminum-electrolytic capacitors store and deliver life-saving bursts of electric charge to the heart. This type of capacitor requires regular “reform” to preserve its charging efficiency over time. Because reform expends valuable battery energy, manufacturers developed wet-tantalum capacitors, which are generally understood not to require reform. Yet, the present inventors discovered through extensive study that wet-tantalum capacitors exhibit progressively worse charging efficiency over time. Accordingly, to address this problem, the inventors devised unique reform techniques for wet-tantalum capacitors. One exemplary technique entails charging wet-tantalum capacitors to a voltage equal to about 90% of their rated voltage and allowing the charge to dissipate through system leakage for a period of time, before discharging through a non-therapeutic load.

    Reforming wet-tantalum capacitors in implantable medical devices
    5.
    发明授权
    Reforming wet-tantalum capacitors in implantable medical devices 失效
    在植入式医疗设备中改造湿钽电容器

    公开(公告)号：US06706059B2

    公开(公告)日：2004-03-16

    申请号：US09990180

    申请日：2001-11-21

    申请人： Robert S. Harguth ,  Ron A. Balczewski ,  William J. Linder ,  Gregory S. Munson ,  Michael W. Paris

    发明人： Robert S. Harguth ,  Ron A. Balczewski ,  William J. Linder ,  Gregory S. Munson ,  Michael W. Paris

    IPC分类号： A61N100

    CPC分类号： H01G9/042 ,  A61N1/3956

    摘要： Miniature defibrillators and cardioverters detect abnormal heart rhythms and automatically apply electrical therapy to restore normal heart function. Critical to this function, aluminum-electrolytic capacitors store and deliver life-saving bursts of electric charge to the heart. This type of capacitor requires regular “reform” to preserve its charging efficiency over time. Because reform expends valuable battery energy, manufacturers developed wet-tantalum capacitors, which are generally understood not to require reform. Yet, the present inventors discovered through extensive study that wet-tantalum capacitors exhibit progressively worse charging efficiency over time. Accordingly, to address this problem, the inventors devised unique reform techniques for wet-tantalum capacitors. One exemplary technique entails charging wet-tantalum capacitors to a voltage equal to about 90% of their rated voltage and allowing the charge to dissipate through system leakage for a period of time, before discharging through a non-therapeutic load.

    摘要翻译： 微型除颤器和心脏转复器检测异常心律，并自动应用电疗法恢复正常的心脏功能。 这个功能至关重要的是，铝电解电容器可以将心脏中的电荷充满拯救生命。 这种类型的电容器需要经常的“改造”以保持其充电效率随着时间的推移。 由于改革耗费了宝贵的电池能量，所以制造商开发了湿钽电容器，通常被认为不需要改造。 然而，本发明人通过广泛的研究发现，湿钽电容器随着时间的推移呈现逐渐变差的充电效率。 因此，为了解决这个问题，本发明人为湿钽电容器设计了独特的改进技术。 一个示例性技术需要将湿钽电容器充电至等于其额定电压的约90％的电压，并且在通过非治疗负载放电之前允许电荷通过系统泄漏耗散一段时间。