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1.发明申请Precise location of buried metallic pipes and cables in the presence of signal distortion 有权在存在信号失真的情况下，埋藏金属管道和电缆的精确位置公开(公告)号：US20060036376A1
公开(公告)日：2006-02-16
申请号：US11100696
申请日：2005-04-06
IPC分类号： G01B5/00
CPC分类号： G01V3/081
摘要： A new approach for locating an underground line described herein remains accurate in the face of bleedover by including both amplitude and phase from at least two magnetic field strength sensors in the measurement set. A numerical optimization step is introduced to deduce the positions and currents of each of several cables, of which one is the targeted cable and the others are termed bleedover cables. Furthermore, some embodiments of the method accounts for practical problems that exist in the field that relate to reliable estimation of cable positions, like the phase transfer function between transmitter and receiver, the estimation of confidence bounds for each estimate, and the rejection of false positive locates due to the presence of noise and interference.
摘要翻译： 通过在测量组中包括来自至少两个磁场强度传感器的振幅和相位两者来确定泄漏面的新方法，用于定位本文所述的地下线路的方法仍然是准确的。 引入数值优化步骤来推导出几根电缆的位置和电流，其中一条是目标电缆，其他电缆称为放电电缆。 此外，该方法的一些实施例解决了现场存在的与电缆位置的可靠估计相关的实际问题，如发射机和接收机之间的相位传递函数，每个估计的置信界限的估计以及假阳性的拒绝 由于噪声和干扰的存在而定位。
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公开(公告)号：US08515689B2
公开(公告)日：2013-08-20
申请号：US12209999
申请日：2008-09-12
申请人： Kun Li , Jim Waite , Ruwan Welaratna , Johan Overby , Paolo Salvagione
发明人： Kun Li , Jim Waite , Ruwan Welaratna , Johan Overby , Paolo Salvagione
IPC分类号： G01B5/30
CPC分类号： G01R29/085 , G01V3/081 , G01V3/104 , G01V3/15 , G01V3/38
摘要： A method for determining the location of underground cables and pipes is disclosed. In some embodiments, the method includes measuring a set of electromagnetic field magnitudes and phases at a plurality of positions while traversing a target line parallelly using 3D electromagnetic coil sensors, the 3D electromagnetic coil sensors being orthogonally oriented to the target line, modeling a set of expected complex electromagnetic field magnitudes of a single underground conductor at each of the positions to form a set of values corresponding to a set of individual models for the target line, determining which of the set of individuals models is a best model, determining confidence information at each of the positions based on a comparison between the measured set of complex electromagnetic magnitudes and phases and the best model, and determining parameters at each of positions related to the target line from the best model.
摘要翻译： 公开了一种确定地下电缆和管道位置的方法。 在一些实施例中，该方法包括在使用3D电磁线圈传感器平行地横过目标线的同时测量多个位置处的一组电磁场幅度和相位，3D电磁线圈传感器正向定向到目标线，对一组 预期在每个位置处的单个地下导体的复杂电磁场强度以形成对应于用于目标线的一组单独模型的值的集合，确定该组个人模型中的哪一个是最佳模型，确定 基于所测量的复电磁幅度和相位的组合之间的比较以及最佳模型的每个位置，以及在与最佳模型中的目标线相关的每个位置处确定参数。
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公开(公告)号：US20090128156A1
公开(公告)日：2009-05-21
申请号：US12209999
申请日：2008-09-12
申请人： Kun Li , Jim Waite , Ruwan Welaratna , Johan Overby , Paolo Salvagione
发明人： Kun Li , Jim Waite , Ruwan Welaratna , Johan Overby , Paolo Salvagione
CPC分类号： G01R29/085 , G01V3/081 , G01V3/104 , G01V3/15 , G01V3/38
摘要： A method for determining the location of underground cables and pipes is disclosed. In some embodiments, the method includes measuring a set of electromagnetic field magnitudes and phases at a plurality of positions while traversing a target line parallelly using 3D electromagnetic coil sensors, the 3D electromagnetic coil sensors being orthogonally oriented to the target line, modeling a set of expected complex electromagnetic field magnitudes of a single underground conductor at each of the positions to form a set of values corresponding to a set of individual models for the target line, determining which of the set of individuals models is a best model, determining confidence information at each of the positions based on a comparison between the measured set of complex electromagnetic magnitudes and phases and the best model, and determining parameters at each of positions related to the target line from the best model.
摘要翻译： 公开了一种确定地下电缆和管道位置的方法。 在一些实施例中，该方法包括在使用3D电磁线圈传感器平行地横过目标线的同时测量多个位置处的一组电磁场幅度和相位，3D电磁线圈传感器正向定向到目标线，对一组 预期在每个位置处的单个地下导体的复杂电磁场强度以形成对应于用于目标线的一组单独模型的值的集合，确定该组个人模型中的哪一个是最佳模型，确定 基于所测量的复电磁幅度和相位的组合之间的比较以及最佳模型的每个位置，以及在与最佳模型中的目标线相关的每个位置处确定参数。
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4.发明申请公开(公告)号：US20060133519A1
公开(公告)日：2006-06-22
申请号：US10517095
申请日：2003-06-06
CPC分类号： H04B3/32 , H04L25/03834 , H04L27/2647 , H04L2025/03414 , H04L2025/03426
摘要： A method and system for providing window shaping for multiline transmission in a communications system are described. A last portion of a prefix symbol is extracted. A prefix with a prefix window is shaped to create a shaped prefix. A DMT symbol is shaped with a DMT window to create a shaped DMT symbol. The shaped DMT symbol is combined with the shaped prefix.
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5.发明申请Method and apparatus for digital detection of electronic markers using frequency adaptation 有权使用频率适应的电子标记的数字检测方法和装置公开(公告)号：US20050159929A1
公开(公告)日：2005-07-21
申请号：US10759747
申请日：2004-01-15
申请人： Johan Overby , James Waite
发明人： Johan Overby , James Waite
摘要： An electronic marker locator with a digital architecture for providing accurate and consistent estimation of the signal strength is presented. The marker locator includes a Digital Phase-Locked Loop (DPLL) structure. The electronic marker locator transmits known and adjustable frequency bursts corresponding to the markers to be located while synchronously capturing the signals returned from the markers. Because of the convergence properties of the DPLL, very consistent measurements of the reflected marker signal field strength are possible, resulting in both an improvement of maximum detection depth and depth accuracy. Further, the analog front-end hardware can be reduced, offering wider resistance to component tolerances, lower calibration and test times, and flexible frequency selectivity.
摘要翻译： 提出了一种具有数字架构的电子标记定位器，用于提供准确一致的信号强度估计。 标记定位器包括数字锁相环（DPLL）结构。 电子标记定位器在同步捕获从标记返回的信号的同时发送对应于要定位的标记的已知和可调节的频率突发。 由于DPLL的收敛特性，反射标记信号场强的非常一致的测量是可能的，从而提高了最大检测深度和深度精度。 此外，可以减少模拟前端硬件，提供更宽的元件容差阻力，降低校准和测试时间以及灵活的频率选择性。
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公开(公告)号：US20100141261A1
公开(公告)日：2010-06-10
申请号：US12315696
申请日：2008-12-05
申请人： Johan Overby , James W. Waite , Dimitar Gargov , Kun Li
发明人： Johan Overby , James W. Waite , Dimitar Gargov , Kun Li
CPC分类号： G01V3/12
摘要： A method for determining the location of an underground sonde transmitter is disclosed. In some embodiments, the method includes measuring a set of complex electromagnetic field magnitude and phase strengths at one or more of positions while traversing a target sonde path at any angle using one or more electromagnetic coil sensors, modeling a set of expected complex electromagnetic strengths of a hypothetical sonde at the one or more of positions for one or more of the electromagnetic coil sensors, the set of expected electromagnetic field values corresponding to a model for the target sonde, and estimating parameters related to the target sonde based on the residual error between the measured set of complex electromagnetic field values and the modeled set of expected complex electromagnetic field strengths, wherein a final estimated parameter set is determined after the residual error has converged to a minimum tolerance.
摘要翻译： 公开了一种用于确定地下探空发射机位置的方法。 在一些实施例中，该方法包括在一个或多个位置处测量一组复杂电磁场幅度和相位强度，同时使用一个或多个电磁线圈传感器以任何角度穿过目标探空仪路径，对一组预期复合电磁强度进行建模 一个或多个用于一个或多个电磁线圈传感器的一个或多个位置的假想探头，与目标探测器的模型相对应的一组预期电磁场值，以及基于目标探测器相关的参数， 测量的复电磁场值集合和所建模的预期复电磁场强度集合，其中在残差误差已经收敛到最小公差之后确定最终估计参数集。
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7.发明申请Method for decoupling interference due to bleedover in metallic pipe and cable locators 有权在金属管道和电缆定位器中解耦由于泄漏引起的干扰的方法公开(公告)号：US20050248333A1
公开(公告)日：2005-11-10
申请号：US10842239
申请日：2004-05-06
申请人： Hubert Schlapp , Johan Overby
发明人： Hubert Schlapp , Johan Overby
CPC分类号： G01V3/088
摘要： When cables run side by side over a longer distance, an alternating-current signal used for cable location can couple or ‘bleedover’ to neighboring cables. The coupled current flowing in the neighboring cable creates field distortion and makes position determination of the targeted cable difficult. The resulting magnetic field of both (or more) cables has a non-circular shape and is commonly known as a distorted field. Established methods for finding the position of the cable under investigation lead to inaccuracies or even wrong locates. The method described herein eliminates the field distortion that is due to the coupled cables by demodulating a phase reference signal placed on the cable by a transmitter into two signal strength constituents. The inphase signal represents the field strength of the targeted conductor and is substantially free of field distortion. The other quadrature signal contains the component of the field associated with distortion.
摘要翻译： 当电缆并排运行较长距离时，用于电缆位置的交流信号可以耦合或“泄放”到相邻电缆。 在相邻电缆中流动的耦合电流产生场失真，并使目标电缆的位置确定变得困难。 两个（或多个）电缆的所得磁场具有非圆形形状，并且通常被称为失真场。 找到被测电缆位置的确定方法导致不准确或甚至错误的位置。 这里描述的方法通过将由发射机放置在电缆上的相位参考信号解调成两个信号强度成分来消除由耦合电缆引起的场失真。 同相信号表示目标导体的场强，并且基本上没有场失真。 另一个正交信号包含与失真相关的字段的分量。
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8.发明授权Method and system for providing window shaping for multiline transmission in a communications system 失效在通信系统中为多线传输提供窗口整形的方法和系统公开(公告)号：US07522515B2
公开(公告)日：2009-04-21
申请号：US10517095
申请日：2003-06-06
IPC分类号： H04J11/00
CPC分类号： H04B3/32 , H04L25/03834 , H04L27/2647 , H04L2025/03414 , H04L2025/03426
摘要： A method and system for providing window shaping for multiline transmission in a communications system are described. A last portion of a prefix symbol is extracted. A prefix with a prefix window is shaped to create a shaped prefix. A DMT symbol is shaped with a DMT window to create a shaped DMT symbol. The shaped DMT symbol is combined with the shaped prefix.
摘要翻译： 描述了一种在通信系统中提供用于多行传输的窗口整形的方法和系统。 提取前缀符号的最后一部分。 具有前缀窗口的前缀被成形为创建一个成形的前缀。 DMT符号用DMT窗口成形，以创建成形的DMT符号。 形状的DMT符号与形状的前缀相结合。
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9.发明申请Method and apparatus for digital detection of electronic markers using frequency adaptation 有权使用频率适应的电子标记的数字检测方法和装置公开(公告)号：US20070040558A1
公开(公告)日：2007-02-22
申请号：US11590267
申请日：2006-10-30
申请人： Johan Overby , James Waite
发明人： Johan Overby , James Waite
IPC分类号： G01V3/08
摘要： An electronic marker locator with a digital architecture for providing accurate and consistent estimation of the signal strength is presented. The marker locator includes a Digital Phase-Locked Loop (DPLL) structure. The electronic marker locator transmits known and adjustable frequency bursts corresponding to the markers to be located while synchronously capturing the signals returned from the markers. Because of the convergence properties of the DPLL, very consistent measurements of the reflected marker signal field strength are possible, resulting in both an improvement of maximum detection depth and depth accuracy. Further, the analog front-end hardware can be reduced, offering wider resistance to component tolerances, lower calibration and test times, and flexible frequency selectivity.
摘要翻译： 提出了一种具有数字架构的电子标记定位器，用于提供准确一致的信号强度估计。 标记定位器包括数字锁相环（DPLL）结构。 电子标记定位器在同步捕获从标记返回的信号的同时发送对应于要定位的标记的已知和可调节的频率突发。 由于DPLL的收敛特性，反射标记信号场强的非常一致的测量是可能的，从而提高了最大检测深度和深度精度。 此外，可以减少模拟前端硬件，提供更宽的元件容差阻力，降低校准和测试时间以及灵活的频率选择性。
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10.发明申请Method and apparatus for digital detection of electromagnetic signal strength and signal direction in metallic pipes and cables 有权金属管道和电缆中电磁信号强度和信号方向的数字检测方法和装置公开(公告)号：US20050096879A1
公开(公告)日：2005-05-05
申请号：US10622376
申请日：2003-07-18
申请人： James Waite , Johan Overby
发明人： James Waite , Johan Overby
CPC分类号： G01V3/12
摘要： A new digital architecture for metallic pipe and cable locators, providing accurate estimation of the fundamental locate parameters, electromagnetic signal strength and signal direction, and utilizing a nested Digital Phase-Locked Loop (DPLL) structure is disclosed. The obstacles to signal direction measurement in low SINR environments using the signal select method are overcome and a more precise phase comparison between the carrier and the FM modulation signals is obtained. The architecture further significantly reduces analog front-end hardware requirements, offers wider resistance to component tolerances, lower calibration and test time, and provides flexible frequency selectivity. Locators according to the present invention provide accurate estimation of the fundamental physical parameters of line location (electromagnetic signal strength and signal direction) in extremely noisy environments, using Digital Signal Processing (DSP) methods.
摘要翻译： 公开了一种用于金属管道和电缆定位器的新型数字架构，提供了对基本定位参数，电磁信号强度和信号方向的准确估计，以及利用嵌套数字锁相环（DPLL）结构。 使用信号选择方法在低SINR环境中信号方向测量的障碍被克服，并且获得载波和FM调制信号之间的更精确的相位比较。 该架构进一步显着降低了模拟前端硬件要求，提供更宽的元件容差阻力，降低校准和测试时间，并提供灵活的频率选择性。 根据本发明的定位器使用数字信号处理（DSP）方法在极其嘈杂的环境中提供线路位置（电磁信号强度和信号方向）的基本物理参数的精确估计。
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