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    Electroimpedance tomograph with common-mode signal suppression
    1.
    发明授权
    Electroimpedance tomograph with common-mode signal suppression 有权
    具有共模信号抑制的电阻断层扫描

    公开(公告)号：US07941210B2

    公开(公告)日：2011-05-10

    申请号：US11427516

    申请日：2006-06-29

    申请人： Hans Matthiessen ,  Dieter Weismann ,  Jianhua Li ,  Yvo Gärber ,  Arndt Pöcher ,  Markus Steeger

    发明人： Hans Matthiessen ,  Dieter Weismann ,  Jianhua Li ,  Yvo Gärber ,  Arndt Pöcher ,  Markus Steeger

    IPC分类号： A61B5/05 ,  G01R27/00 ,  G01R27/08

    CPC分类号： A61B5/0536 ,  A61B5/0809 ,  H03F3/45475 ,  H03F3/45928 ,  H03F2200/261 ,  H03F2203/45138

    摘要： An electroimpedance tomograph with a plurality of electrodes (1) is provided, which can be placed on the body of a patient and are connected via a selector switch (60) with a control and evaluating unit (20). The control and evaluating unit (20) cooperates with the selector switch (60) such that two electrodes each are supplied with an alternating current from an AC power source (22) and the detected analog voltage signals of the other electrodes are processed in order to reconstruct therefrom the impedance distribution of the body in the plane of the electrodes, wherein a symmetrical AC power source is used to reduce common-mode signals. To further suppress interferences due to common-mode signals, provisions are made for the control and evaluating unit (20) to be set up, furthermore, for detuning the common-mode signal of the alternating current on the body against the ground by means of a common-mode signal measuring electrode (4) and, based on this, the symmetry of the symmetrical AC power source such that the common-mode signal on the body is minimized, and the corresponding detuning parameters are stored for each electrode pair.

    摘要翻译： 提供具有多个电极（1）的电阻抗断层摄影机，其可以放置在患者体上，并经由选择器开关（60）与控制和评估单元（20）连接。 控制和评估单元（20）与选择器开关（60）配合使得两个电极各自被提供有来自AC电源（22）的交流电，并且处理其它电极的检测到的模拟电压信号，以便 从而重建在电极的平面中的主体的阻抗分布，其中使用对称的AC电源来减少共模信号。 为了进一步抑制由于共模信号引起的干扰，为控制和评估单元（20）进行设置，此外，为了使身体上的交流电的共模信号与地面相互抵消，借助于 共模信号测量电极（4），并且基于此，对称AC电源的对称性使得主体上的共模信号最小化，并且针对每个电极对存储相应的失谐参数。

    Electroimpedance tomograph with common-mode signal suppression
    2.
    发明授权
    Electroimpedance tomograph with common-mode signal suppression 有权
    具有共模信号抑制的电阻断层扫描

    公开(公告)号：US07288943B2

    公开(公告)日：2007-10-30

    申请号：US11419318

    申请日：2006-05-19

    申请人： Hans Matthiessen ,  Dieter Weismann ,  Jianhua Li ,  Yvo Gärber

    发明人： Hans Matthiessen ,  Dieter Weismann ,  Jianhua Li ,  Yvo Gärber

    IPC分类号： G01R27/04 ,  G01R27/08 ,  A61B5/04 ,  A61B5/05

    CPC分类号： A61B5/0536

    摘要： An electroimpedance tomograph is provided with a plurality of electrodes (1), which can be placed on the body of a patient and are connected to a control and evaluating unit (20) via a selector switch (60). The control and evaluating unit (20) cooperates with the selector switch (60) such that two electrodes each are supplied with alternating current from an AC power source (22). The detected analog voltage signals of the other electrodes are sent into the control and evaluating unit (20) via a measuring amplifier (62) and AD converter (64) and are processed there in order to reconstruct the impedance distribution of the body in the plane of the electrodes therefrom. A symmetrical AC power source (22) is used to reduce common-mode signals. To make it possible to suppress errors due to common-mode signals, provisions are made for the control and evaluating unit (20) to be set up for making available an additional common-mode signal at an output during an adjusting mode of operation and to send it to the body via common-mode signal electrodes (4, 90) that can be placed on the body. The control and evaluating unit (20) is prepared, furthermore, to adjust the measuring amplifier (62) according to value and phase for each electrode pair connected by the selector switch (60) such that the common-mode signal at the output of the measuring amplifier (62) is minimized, and the adjusted parameters are stored for each electrode pair.

    摘要翻译： 电阻断层摄影机设置有多个电极（1），其可以放置在患者的身体上，并且经由选择器开关（60）连接到控制和评估单元（20）。 控制和评估单元（20）与选择器开关（60）配合，使得两个电极各自由AC电源（22）提供交流电。 检测出的其他电极的模拟电压信号通过测量放大器（62）和AD转换器（64）发送到控制和评估单元（20），并在那里进行处理，以便重建在平面内的主体的阻抗分布 的电极。 使用对称的交流电源（22）来减少共模信号。 为了能够抑制由于共模信号引起的误差，为了使控制和评估单元（20）被设置成在调节操作模式期间在输出端提供额外的共模信号，并且 通过可以放置在身体上的共模信号电极（4,90）将其发送到身体。 此外，准备控制和评估单元（20）根据由选择器开关（60）连接的每个电极对的值和相位来调节测量放大器（62），使得在输出端的共模信号 测量放大器（62）被最小化，并且为每个电极对存储调整的参数。

    Electroimpedance tomograph
    3.
    发明授权
    Electroimpedance tomograph 有权
    电阻断层扫描仪

    公开(公告)号：US07711418B2

    公开(公告)日：2010-05-04

    申请号：US10882050

    申请日：2004-06-30

    申请人： Yvo Gärber ,  Markus Steeger ,  Jianhua Li ,  Steffen Leonhardt ,  Jan Rüterbories ,  Rainer Goldau

    发明人： Yvo Gärber ,  Markus Steeger ,  Jianhua Li ,  Steffen Leonhardt ,  Jan Rüterbories ,  Rainer Goldau

    IPC分类号： A61B5/05

    CPC分类号： A61B5/0536 ,  Y10S128/908

    摘要： An electroimpedance tomograph including a plurality of electrodes placed on a body, measuring circuits processing voltage signals recorded by the electrodes, and a control unit supplying two electrodes each with an alternating current. The control unit has a preset feed frequency. The control unit processes the processed voltage signals of all other electrodes to reconstruct the impedance distribution of the body in the electrode plane. The control unit provides for an automatic setting of the current feed frequency/frequencies to record a background frequency spectrum by detecting the electrode voltage signals over a preset period of time and record them as a voltage time series and transform them into a frequency spectrum. The control unit searches in the background frequency spectrum for a frequency (different states) or frequencies (different frequencies) that leads to a useful signal to background ratio above a preset threshold value when used as a feed frequency.

    摘要翻译： 一种电阻断层摄影机，包括放置在人体上的多个电极，测量电路处理由电极记录的电压信号，以及控制单元，每个电极提供两个交流电。 控制单元具有预设的进给频率。 控制单元处理所有其他电极的经处理的电压信号，以重建电极平面中的主体的阻抗分布。 控制单元通过在预设的时间段内检测电极电压信号来提供当前馈送频率/频率的自动设置以记录背景频谱，并将其记录为电压时间序列并将其转换成频谱。 当用作馈送频率时，控制单元在背景频谱中搜索频率（不同状态）或频率（不同频率），导致有用信号到背景比高于预设阈值。

    Elecrtoimpedance tomograph
    6.
    发明申请
    Elecrtoimpedance tomograph 有权
    电阻断层扫描

    公开(公告)号：US20050059901A1

    公开(公告)日：2005-03-17

    申请号：US10882050

    申请日：2004-06-30

    申请人： Yvo Garber ,  Markus Steeger ,  Jianhua Li ,  Steffen Leonhardt ,  Jan Ruterbories ,  Rainer Goldau

    发明人： Yvo Garber ,  Markus Steeger ,  Jianhua Li ,  Steffen Leonhardt ,  Jan Ruterbories ,  Rainer Goldau

    IPC分类号： A61B5/053 ,  G01N27/02 ,  A61B5/05

    CPC分类号： A61B5/0536 ,  Y10S128/908

    摘要： An electroimpedance tomograph is provided with a plurality of electrodes placed on a body, measuring circuits that process the voltage signals recorded by the electrodes, and a control unit that supplies two, preferably adjacent electrodes each with an alternating current. The control unit has a preset feed frequency performed in different states and different preset feed frequencies performed at different frequencies. The control unit processes the processed voltage signals of all other electrodes to reconstruct the impedance distribution of the body in the electrode plane. To make the EIT more insensitive to electromagnetic interferences, the control unit provides for an automatic setting of the current feed frequency/frequencies to record a background frequency spectrum by detecting the electrode voltage signals over a preset period of time and record them as a voltage time series and transform them into a frequency spectrum. The control unit searches in the background frequency spectrum for a frequency (different states) or frequencies (different frequencies) that leads to a useful signal to background ratio above a preset threshold value when used as a feed frequency.

    摘要翻译： 电阻断层摄影机设置有放置在人体上的多个电极，处理由电极记录的电压信号的测量电路，以及提供两个优选相邻电极各自具有交流电流的控制单元。 控制单元具有在不同状态下执行的预设馈送频率和在不同频率执行的不同预设馈送频率。 控制单元处理所有其他电极的经处理的电压信号，以重建电极平面中的主体的阻抗分布。 为了使EIT对电磁干扰更加不敏感，控制单元通过在预设时间段内检测电极电压信号来自动设置当前馈送频率/频率以记录背景频谱，并将其记录为电压时间 并将其转换为频谱。 当用作馈送频率时，控制单元在背景频谱中搜索频率（不同状态）或频率（不同频率），导致有用信号到背景比高于预设阈值。

    Method and apparatus for providing omnidirectional illumination using LED lighting
    8.
    发明授权
    Method and apparatus for providing omnidirectional illumination using LED lighting 有权
    使用LED照明提供全向照明的方法和装置

    公开(公告)号：US08395310B2

    公开(公告)日：2013-03-12

    申请号：US13049157

    申请日：2011-03-16

    申请人： Jianhua Li

    发明人： Jianhua Li

    IPC分类号： F21V7/10 ,  F21V29/00 ,  H05B37/00

    CPC分类号： F21V3/02 ,  F21K9/232 ,  F21V3/061 ,  F21V3/062 ,  F21V7/0008 ,  F21V13/02 ,  F21V29/506 ,  F21V29/83 ,  F21Y2107/20 ,  F21Y2107/30 ,  F21Y2107/40 ,  F21Y2115/10

    摘要： A light-emitting device capable of generating omnidirectional light utilizing a reflector is disclosed. The light-emitting device, in one aspect, includes a light emitting diode (“LED”) package, a light reflector, and a shell. The LED package, which is mounted on a plate, generates a forward light cone by converting electrical energy to optical energy. The light reflector can be formed with various different shapes that can be placed adjacent to the LED package. A function of the light reflector is to redistribute at least a portion of the forward light cone whereby the overall light illuminated by the light-emitting device complies with LM79 specifications. The shell is used to enclose the LED package and the light reflector and configured to illuminate light in omnidirectional radiation in response to the forward light cone.

    摘要翻译： 公开了一种能够利用反射器产生全向光的发光装置。 在一个方面，发光器件包括发光二极管（LED）封装，光反射器和外壳。 安装在板上的LED封装通过将电能转换为光能而产生向前的光锥。 光反射器可以形成有可以放置在LED封装附近的各种不同形状。 光反射器的功能是重新分布前光锥的至少一部分，由此由发光装置照射的整个光符合LM79规范。 外壳用于封装LED封装和光反射器，并配置为响应于前向光锥而在全向辐射中照亮光。