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。

公开(公告)号：US07301337B2

公开(公告)日：2007-11-27

申请号：US10675187

申请日：2003-09-30

申请人： David Beard

发明人： David Beard

IPC分类号： 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。 从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。

公开(公告)号：US20070252724A1

公开(公告)日：2007-11-01

申请号：US11571172

申请日：2005-06-24

申请人： Andrew Donaghey ,  Ian McDonald ,  David Beard

发明人： Andrew Donaghey ,  Ian McDonald ,  David Beard

IPC分类号： G08G1/09 ,  B60Q1/00 ,  G08G1/123

CPC分类号： H04Q9/00 ,  G01D4/004 ,  G01R22/063 ,  G01R22/10 ,  G06F8/654 ,  G08G1/091 ,  G08G1/092 ,  G08G1/0962 ,  G08G5/0026 ,  Y02B90/242 ,  Y04S20/322

摘要： An alert device for a vehicle including a communications receiver for receiving file fragments for the device, a positioning data receiver for providing vehicle location data, a microcontroller system including a microcontroller and a programmable non-volatile memory system, for building and storing application and data files from the fragments, and executing an alert application of the device by processing at least one application file and associated data identified by configuration instructions included in at least one of the fragments to provide alert data for the vehicle corresponding to the location of the vehicle determined by the application on the basis of the vehicle location data.

摘要翻译： 一种用于车辆的警报装置，包括用于接收用于设备的文件片段的通信接收器，用于提供车辆位置数据的定位数据接收器，包括微控制器和可编程非易失性存储器系统的微控制器系统，用于构建和存储应用和数据 并且通过处理至少一个应用文件和由包括在至少一个片段中的配置指令所识别的相关联的数据来执行设备的警报应用，以提供对应于所确定的车辆的位置的车辆的警报数据 通过应用在车辆位置数据的基础上。

公开(公告)号：US06597170B1

公开(公告)日：2003-07-22

申请号：US09606998

申请日：2000-06-29

申请人： David Beard ,  Gregory Itskovich ,  Arcady Reiderman ,  Songhua Chen

发明人： David Beard ,  Gregory Itskovich ,  Arcady Reiderman ,  Songhua Chen

IPC分类号： G01V300

CPC分类号： G01V3/32 ,  G01N24/081

摘要： Pulse shaping is used for reducing the interference between echo trains of multiple frequency NMR logging applications in a gradient logging tool. The major contribution to the interference between different logging sequences comes from the sidelobes in the spectra of the excitation signal caused by modulating the RF signal with a square pulse. By shaping the tipping pulse in a CPMG pulse sequence, the interference between logging sequences at proximate frequencies is reduced. The shaped pulse may be a smooth function such as the Chebyshev function or it may be a composite of two rectangular pulses. In an alternate embodiment of the invention, the refocusing pulses are also shaped.

摘要翻译： 脉冲整形用于减少梯度测井工具中多次NMR测井应用的回波列之间的干扰。 对不同记录序列之间的干扰的主要贡献来自于通过用平方脉冲调制RF信号引起的激励信号的频谱中的旁瓣。 通过以CPMG脉冲序列整形翻转脉冲，降低了接近频率下记录序列之间的干扰。 成形脉冲可以是诸如切比雪夫功能的平滑功能，或者它可以是两个矩形脉冲的复合。 在本发明的替代实施例中，再聚焦脉冲也被成形。

公开(公告)号：US06437564B1

公开(公告)日：2002-08-20

申请号：US09846971

申请日：2001-05-01

申请人： Gregory Boris Itskovich ,  David Beard ,  Arcady Reiderman

发明人： Gregory Boris Itskovich ,  David Beard ,  Arcady Reiderman

IPC分类号： G01V300

CPC分类号： G01V3/32 ,  G01N24/081

摘要： The static magnetic field of a permanent magnet used in an NMR tool moves with the tool. NMR measurements made with a moving tool are affected by incomplete polarization of the nuclear spins in the region where the Larmor frequency of static field matches the RF signal frequency. Simulation results show that the in-phase and quadrature components of spin echo signals are affected by the velocity of lateral motion of a logging tool in a borehole. A phase drift indicator is obtained by summing the quadrature and in-phase components over a window and taking the ratio of the windowed sums. The phase drift indicator shows an increase with time. In a tool with a gradient magnetic field, the phase drift indicator increases with time even for no tool motion. The reduction in magnitude of spin echo data due to tool motion alone may be obtained by comparing the magnitude of simulated echoes with and without tool motion.

摘要翻译： 用于NMR工具的永磁体的静磁场随工具移动。 使用移动工具进行的NMR测量受静态场拉莫尔频率与RF信号频率匹配的区域中的核自旋的不完全极化的影响。 模拟结果表明，自旋回波信号的同相和正交分量受井眼测井工具横向运动速度的影响。 通过对窗口上的正交和同相分量进行求和并获取窗口和的比值来获得相位漂移指示符。 相位漂移指示器随着时间的推移而增加。 在具有梯度磁场的工具中，即使没有刀具运动，相位漂移指示器随时间增加。 可以通过比较具有和不具有工具运动的模拟回波的幅度来获得由于单独的工具运动引起的自旋回波数据的幅度的减小。

公开(公告)号：US09327799B2

公开(公告)日：2016-05-03

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： B62M1/36 ,  B62M3/00 ,  A63B21/015 ,  A63B22/06 ,  G06F1/16

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。

公开(公告)号：USD634627S1

公开(公告)日：2011-03-22

申请号：US29356842

申请日：2010-03-03

申请人： David Beard

设计人： David Beard

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。

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。

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。