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27 条记录 (耗时 0.03 秒)

    Use of measurements made in one echo train to correct ringing in second to avoid use of phase alternated pair in the second
    11.
    发明申请
    Use of measurements made in one echo train to correct ringing in second to avoid use of phase alternated pair in the second 有权
    使用在一个回波列车中进行的测量来纠正秒钟振铃，以避免在第二次使用相位交替对

    公开(公告)号：US20050231198A1

    公开(公告)日：2005-10-20

    申请号：US10827183

    申请日：2004-04-19

    申请人： David Beard ,  Daniel Georgi

    发明人： David Beard ,  Daniel Georgi

    IPC分类号： G01R33/44 ,  G01V3/00 ,  G01V3/32

    CPC分类号： G01N24/081 ,  G01V3/32

    摘要： Estimates of ringing produced by short recovery pulse sequences (CPMG or modified CPMG) are used to improve the effects of ringing in a conventional CPMG or modified CPMG sequences. This is an effective method for removal of ringing when the ringing is varying over a time interval that would be spanned by a phase alternated pair of conventional sequences. By use of frequency dithering, ringing due to the excitation pulse and the refocusing pulses can be removed.

    摘要翻译： 使用由短恢复脉冲序列（CPMG或修饰的CPMG）产生的振铃的估计值来改善常规CPMG或修饰的CPMG序列中的振铃效应。 这是一种有效的方法，当振铃在由相位交替的常规序列对跨越的时间间隔上变化时，可以去除振铃。 通过使用频率抖动，可以消除由于激发脉冲和重聚焦脉冲引起的振铃。

    Synchronized digital stacking method and application to induction logging tools
    12.
    发明授权
    Synchronized digital stacking method and application to induction logging tools 失效
    同步数字堆叠方法和应用于感应测井工具

    公开(公告)号：US5452761A

    公开(公告)日：1995-09-26

    申请号：US331802

    申请日：1994-10-31

    申请人： David Beard ,  Carlos Yansig ,  Robert A. Lester

    发明人： David Beard ,  Carlos Yansig ,  Robert A. Lester

    IPC分类号： E21B47/00 ,  E21B49/00 ,  G01V3/28 ,  G01V3/34 ,  E21B43/00

    CPC分类号： E21B49/00 ,  E21B47/00 ,  G01V3/28 ,  G01V3/34

    摘要： An apparatus and method for digitally processing signals received by an induction logging tool having a transmitter and a plurality of receivers. An oscillating signal is provided to the transmitter, which causes eddy currents to flow in a surrounding formation. The magnitudes of the eddy currents are proportional to the conductivity of the formation. The eddy currents in turn induce voltages in the receivers. The received voltages are digitized at a sampling rate well above the maximum frequency of interest. The digitizing window is synchronized to a cycle of the oscillating current signal. Corresponding samples obtained in each cycle are cumulatively summed over a large number of such cycles. The summed samples form a stacked signal. Stacked signals generated for corresponding receiver coils are transmitted to a computer for spectral analysis. Transmitting the stacked signals and not all the individually sampled signals, reduces the amount of data that needs to be stored or transmitted. A Fourier analysis is performed on the stacked signals to derive the amplitudes of in-phase and quadrature components of the receiver voltages at the frequencies of interest. From the component amplitudes, the conductivity of the formation can be accurately derived.

    摘要翻译： 一种用于数字处理由具有发射器和多个接收器的感应测井工具接收的信号的装置和方法。 向发射机提供振荡信号，使得涡流在周围地层中流动。 涡流的大小与地层的电导率成比例。 涡流又在接收器中感应出电压。 接收的电压以远高于感兴趣的最大频率的采样率数字化。 数字化窗口与振荡电流信号的周期同步。 在每个周期中获得的相应样品在大量这样的循环中累积地求和。 相加样本形成堆叠信号。 为相应的接收器线圈产生的堆叠信号被传送到计算机进行光谱分析。 发送堆叠的信号而不是所有单独采样的信号，减少了需要存储或发送的数据量。 对叠加的信号进行傅立叶分析，以得到感兴趣的频率下接收机电压的同相和正交分量的振幅。 从分量幅度可以准确地得出地层的电导率。

    APPARATUS, SYSTEM, AND METHOD FOR CYCLE IMPROVEMENTS
    13.
    发明申请
    APPARATUS, SYSTEM, AND METHOD FOR CYCLE IMPROVEMENTS 有权
    装置，系统和周期改进方法

    公开(公告)号：US20120238410A1

    公开(公告)日：2012-09-20

    申请号：US13048860

    申请日：2011-03-15

    申请人： Deo Magakat ,  David Beard ,  Victor Cornejo ,  Kevin Corbalis ,  Michael Morgan

    发明人： Deo Magakat ,  David Beard ,  Victor Cornejo ,  Kevin Corbalis ,  Michael Morgan

    IPC分类号： A63B22/08 ,  B62M3/08 ,  B23P11/00 ,  B62M3/00 ,  B62M1/02

    CPC分类号： A63B22/0605 ,  A63B21/0055 ,  A63B21/015 ,  A63B2022/0611 ,  A63B2220/34 ,  A63B2220/51 ,  B62M3/00 ,  B62M3/003 ,  B62M3/08 ,  G06F1/1632 ,  Y10T29/49826 ,  Y10T74/2164

    摘要： A cycle with tapered drivetrain connections. The cycle includes a frame, a crank rotatably connected to the frame, and a driven wheel rotatably connected to the frame. The crank includes a crank arm and a crank spindle rotatably connected to the frame and non-rotatably connected to the crank arm. The crank spindle includes a crank mating surface to interface with the crank arm. The diameter of the crank spindle continuously decreases along at least a portion of the crank mating surface in a lateral direction. The crank arm includes a crank bore to interface with the crank mating surface. At least a portion of the crank bore has a diameter that continuously decreases in lateral direction. At least a portion of the crank bore taper has a taper rate and diameter equal to a taper rate and diameter of at least a portion of the crank spindle taper.

    摘要翻译： 具有锥形传动系连接的循环。 该循环包括框架，可旋转地连接到框架的曲柄和可旋转地连接到框架的从动轮。 曲柄包括可旋转地连接到框架并且不可旋转地连接到曲柄臂的曲柄臂和曲柄心轴。 曲柄轴包括与曲柄臂相接的曲柄配合表面。 曲柄轴的直径沿曲柄配合面的至少一部分沿横向方向连续地减小。 曲柄臂包括与曲柄配合表面相接的曲柄孔。 曲柄孔的至少一部分具有在横向方向上连续减小的直径。 曲柄孔锥度的至少一部分具有等于曲柄轴锥度的至少一部分的锥度速率和直径的锥度速率和直径。

    Frequency dithering to avoid excitation pulse ringing
    14.
    发明申请
    Frequency dithering to avoid excitation pulse ringing 有权
    频率抖动以避免激励脉冲振铃

    公开(公告)号：US20050068027A1

    公开(公告)日：2005-03-31

    申请号：US10675187

    申请日：2003-09-30

    申请人： David Beard

    发明人： David Beard

    IPC分类号： G01R33/44 ,  G01V3/32 ,  G01V3/00

    CPC分类号： G01N24/081 ,  G01V3/32

    摘要： An apparatus and method of obtaining information about a property of interest relating to an earth formation resulting in reduced ringing effects is discussed. A Nuclear Magnetic Resonance (NMR) logging tool is conveyed into a borehole in the earth formation. A first pulse sequence is applied having a first associated measurement frequency, and first NMR signals are measured. The first NMR signals include non-formation signals resulting from an excitation pulse and a refocusing pulse in the first pulse echo sequence. A second and third pulse sequence, at different frequencies from each other and from the first frequency, is applied, and corresponding second and third NMR signals are measured. A phase of the non-formation signals resulting from the first pulse echo sequence and a phase of the non-formation signals resulting from the second and third pulse echo sequences are substantially evenly distributed around a unit circle.

    摘要翻译： 讨论了一种获得关于地球物理相关性质的信息的装置和方法，导致振铃效应降低。 核磁共振（NMR）测井工具被输送到地层中的钻孔中。 应用具有第一相关测量频率的第一脉冲序列，并且测量第一NMR信号。 第一NMR信号包括由第一脉冲回波序列中的激发脉冲和再聚焦脉冲产生的非形成信号。 应用彼此不同频率和第一频率的第二和第三脉冲序列，并且测量对应的第二和第三NMR信号。 由第一脉冲回波序列产生的非形成信号的相位和由第二和第三脉冲回波序列产生的非形成信号的相位基本均匀地分布在单位圆周围。

    Freehand image scanning device which compensates for non-linear color movement
    15.
    发明授权
    Freehand image scanning device which compensates for non-linear color movement 失效
    用于补偿非线性颜色运动的手绘图像扫描装置

    公开(公告)号：US5825044A

    公开(公告)日：1998-10-20

    申请号：US805963

    申请日：1997-02-25

    申请人： Ross R. Allen ,  David Beard ,  Mark T. Smith ,  Barclay J. Tullis

    发明人： Ross R. Allen ,  David Beard ,  Mark T. Smith ,  Barclay J. Tullis

    IPC分类号： G06K9/20 ,  G06T1/00 ,  G06T3/00 ,  H04N1/047 ,  H04N1/107 ,  H04N1/193 ,  G06K7/015

    CPC分类号： H04N1/047 ,  H04N1/107 ,  H04N1/193 ,  H04N2201/0414 ,  H04N2201/043 ,  H04N2201/04712 ,  H04N2201/04729 ,  H04N2201/04787

    摘要： A scanning device and method of forming a scanned electronic image include an imaging sensor and at least one navigation sensor. For an embodiment, the imaging sensor enables sensing of color images. In the preferred embodiment, the imaging sensor is a linear array of sensor elements, with a two-dimensional navigation sensor array at each end. The scanning device has three degrees of freedom, since position information from the navigation sensors allows manipulation of an image signal from the imaging sensor to reduce distortion artifacts caused by curvilinear scanning. Acceptable sources of the position information include printed matter and contrast variations dictated by variations in the inherent structure-related properties of the medium on which the scanned image is formed. Inherent structure-related properties can also include color contrast. Illumination for optimal operation of the navigation system may be introduced at a grazing angle in some applications or in the normal to a plane of the original in other applications, but this is not essential.

    摘要翻译： 扫描装置和形成扫描电子图像的方法包括成像传感器和至少一个导航传感器。 对于一个实施例，成像传感器能够感测彩色图像。 在优选实施例中，成像传感器是传感器元件的线性阵列，每端具有二维导航传感器阵列。 扫描装置具有三个自由度，因为来自导航传感器的位置信息允许操纵来自成像传感器的图像信号，以减少由曲线扫描引起的失真伪像。 位置信息的可接受源包括由形成扫描图像的介质的固有结构相关属性的变化所规定的印刷物和对比度变化。 固有的结构相关性质还可以包括颜色对比度。 导航系统的最佳操作的照明可以在某些应用中以放牧角度引入，或者在其它应用中以原始平面垂直的方式被引入，但这不是必须的。

    Offset removal and spatial frequency band filtering circuitry for photoreceiver signals
    17.
    发明授权
    Offset removal and spatial frequency band filtering circuitry for photoreceiver signals 失效
    用于光接收器信号的偏移消除和空间频带滤波电路

    公开(公告)号：US5703353A

    公开(公告)日：1997-12-30

    申请号：US591076

    申请日：1996-01-25

    申请人： Travis N. Blalock ,  Richard A. Baumgartner ,  Thomas Hornak ,  David Beard

    发明人： Travis N. Blalock ,  Richard A. Baumgartner ,  Thomas Hornak ,  David Beard

    IPC分类号： H04N1/028 ,  H01L31/10 ,  H03F1/30 ,  H03F3/08 ,  H03F3/45 ,  H04N1/107 ,  H04N1/19 ,  H04N5/217 ,  H04N5/365 ,  H04N5/378 ,  H01J40/14

    CPC分类号： H03F3/45475 ,  H03F1/303 ,  H03F3/087 ,  H04N5/3651 ,  H04N5/3658 ,  H04N5/3692 ,  H04N5/3742 ,  H04N5/3745 ,  H04N5/378 ,  H03F2200/249 ,  H03F2203/45212

    摘要： Circuitry and method for transferring signals from a photoreceiver array to computational circuitry includes parallel transfer amplifiers that receive periodic offset correction and includes DC removal amplifiers. In a first embodiment, each transfer amplifier has a differential circuit that can be switched from a reset mode to a readout mode. In the readout mode, the voltage state at the output is responsive to first and second inputs, with the second input being connected to a source of a reference voltage. In the reset mode, the inputs are both connected to the reference voltage and the output is temporarily connected to a source of a fixed reset voltage. An offset adjustment signal is generated in response to detection of a voltage difference between the reset voltage and the actual voltage state at the output after the output has been disconnected from the source of the reset voltage. A single offset circuit is used to periodically and sequentially refresh the various transfer amplifiers. In a second embodiment, spatial frequency components at both low and high frequencies are removed from the outputs of the photoreceiver array by DC removal amplifiers. Each DC removal amplifier is assigned to a particular photoelement in the array, but receives outputs from one or more other photoelements in the array. The output of the amplifier is responsive to the differences between the analog signals input to the amplifier.

    摘要翻译： 将信号从光接收器阵列传送到计算电路的电路和方法包括接收周期性偏移校正并包括直流去除放大器的并行传输放大器。 在第一实施例中，每个传送放大器具有可从复位模式切换到读出模式的差分电路。 在读出模式下，输出端的电压状态响应于第一和第二输入，第二输入端连接到参考电压源。 在复位模式下，输入端都连接到参考电压，输出暂时连接到固定复位电压源。 响应于在输出与复位电压源断开之后检测到复位电压和输出端的实际电压状态之间的电压差而产生偏移调整信号。 单个偏移电路用于周期性地并顺序地刷新各种传输放大器。 在第二实施例中，通过DC去除放大器从光接收器阵列的输出去除低频和高频两个空间频率分量。 每个DC去除放大器被分配给阵列中的特定光电元件，但是接收阵列中一个或多个其他光电元件的输出。 放大器的输出响应输入到放大器的模拟信号之间的差异。

    Navigation technique for detecting movement of navigation sensors relative to an object
    18.
    发明授权
    Navigation technique for detecting movement of navigation sensors relative to an object 失效
    用于检测导航传感器相对于物体的移动的导航技术

    公开(公告)号：US5644139A

    公开(公告)日：1997-07-01

    申请号：US696713

    申请日：1996-08-14

    申请人： Ross R. Allen ,  David Beard ,  Mark T. Smith ,  Barclay J. Tullis

    发明人： Ross R. Allen ,  David Beard ,  Mark T. Smith ,  Barclay J. Tullis

    IPC分类号： G06K9/20 ,  G06T1/00 ,  G06T3/00 ,  H04N1/047 ,  H04N1/107 ,  H04N1/193 ,  G06K7/015

    CPC分类号： H04N1/047 ,  H04N1/107 ,  H04N1/193 ,  H04N2201/0414 ,  H04N2201/043 ,  H04N2201/04712 ,  H04N2201/04729 ,  H04N2201/04787

    摘要： A scanning device and method for forming a scanned electronic image include using navigation information that is acquired along with image data, and then rectifying the image data based upon the navigation and image information. The navigation information is obtained in frames. The differences between consecutive frames are detected and accumulated, and this accumulated displacement value is representative of a position of the scanning device relative to a reference. The image data is then positioned-tagged using the position data obtained from the accumulated displacement value. To avoid the accumulation of errors, the accumulated displacement value obtained from consecutive frames is updated by comparing a current frame with a much earlier frame stored in memory and using the resulting difference as the displacement from the earlier frame. These larger displacement steps are then accumulated to determine the relative position of the scanning device.

    摘要翻译： 用于形成扫描电子图像的扫描装置和方法包括使用与图像数据一起获取的导航信息，然后基于导航和图像信息来校正图像数据。 导航信息以帧为单位获得。 检测并累积连续帧之间的差异，并且该累积位移值表示扫描装置相对于基准的位置。 然后使用从累积位移值获得的位置数据来定位图像数据。 为了避免错误的累积，通过将当前帧与存储在存储器中的较早的帧进行比较并使用所得到的差作为与较早帧的位移来更新从连续帧获得的累积位移值。 然后累积这些较大的位移步骤以确定扫描装置的相对位置。