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1. 发明申请

US20060036376A1 Precise location of buried metallic pipes and cables in the presence of signal distortion 有权
标题翻译：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
申请人： Thorkell Gudmundsson , Jim Waite , Johan Overby , Stevan Polak , Niklas Lindstrom
发明人： Thorkell Gudmundsson , Jim Waite , Johan Overby , Stevan Polak , Niklas Lindstrom
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。

2. 发明授权

US07356421B2 Precise location of buried metallic pipes and cables in the presence of signal distortion 有权
标题翻译：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：US07356421B2
公开(公告)日：2008-04-08
申请号：US11100696
申请日：2005-04-06
申请人： Thorkell Gudmundsson , Jim Waite , Johan Överby , Stevan Polak , Niklas Lindstrom
发明人： Thorkell Gudmundsson , Jim Waite , Johan Överby , Stevan Polak , Niklas Lindstrom
IPC分类号： G01V3/15
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。

3. 发明授权

US6130539A Automatic gain control for a line locator 有权
标题翻译：线定位器的自动增益控制
公开(公告)号：US6130539A
公开(公告)日：2000-10-10
申请号：US136793
申请日：1998-08-19
申请人： Stevan Polak
发明人： Stevan Polak
IPC分类号： G01V3/11 , G01V3/15
CPC分类号： G01V3/15
摘要： An automatic gain control (AGC) system for use in line locators that detect concealed conductors is presented. The AGC system includes determining an AGC signal from a reference sensor and processing signals from one or more observed sensors utilizing the AGC signal. The reference sensor is located farther from the concealed conductor than the observed sensors. The AGC system can be implemented in analog form or can include a digital AGC determination in a microprocessor.
摘要翻译：提出了一种用于检测隐藏导体的线定位器的自动增益控制（AGC）系统。 AGC系统包括从参考传感器确定AGC信号并利用AGC信号处理来自一个或多个观测传感器的信号。参考传感器距离隐蔽导体远离观察到的传感器。 AGC系统可以以模拟形式实现，或者可以包括微处理器中的数字AGC确定。

4. 发明授权

US06407550B1 Line locator with accurate horizontal displacement detection 有权
标题翻译：线定位器具有精确的水平位移检测
公开(公告)号：US06407550B1
公开(公告)日：2002-06-18
申请号：US09136767
申请日：1998-08-19
申请人： Gopalakrishnan R. Parakulam , Stevan Polak
发明人： Gopalakrishnan R. Parakulam , Stevan Polak
IPC分类号： G01V310
CPC分类号： G01V3/15
摘要： A line locator having the capability of determining the horizontal position with respect to a line is described. The line locator includes a left sensor and a right sensor of any orientation. The left sensor and the right sensor are coupled to a convolution amplifier that amplifies the sum of the output signals from the left sensor and the right sensor. The detection circuitry includes automatic gain control amplification where the automatic gain control signal is obtained digitally from a digital controller. In addition, the detection circuitry includes phase detection circuitry where the phase reference signal is obtained from an external transmitter that is coupled to the line. In addition, the AGC signal and the phase reference signal may both be obtained by processing output signals from magnetic field detectors in the line locator.
摘要翻译：描述具有确定相对于线的水平位置的能力的线定位器。线定位器包括左传感器和任何方向的右传感器。左传感器和右传感器耦合到卷积放大器，其放大来自左传感器和右传感器的输出信号的总和。检测电路包括自动增益控制放大，其中自动增益控制信号是从数字控制器数字地获得的。此外，检测电路包括相位检测电路，其中从耦合到该线路的外部发射器获得相位参考信号。此外，AGC信号和相位参考信号都可以通过处理来自线定位器中的磁场检测器的输出信号来获得。

5. 发明授权

US07091872B1 Controlled power source for underground line location 有权
标题翻译：地下线路控制电源
公开(公告)号：US07091872B1
公开(公告)日：2006-08-15
申请号：US10189286
申请日：2002-07-01
申请人： Russell N. Bigelow , Stevan Polak , James Long , Joseph Shtargot
发明人： Russell N. Bigelow , Stevan Polak , James Long , Joseph Shtargot
IPC分类号： G08B21/00
CPC分类号： G01V3/081 , H02G9/00 , H02G9/02
摘要： A transmitter for a line locator system that controls the electrical current, voltage or power applied to the target line is disclosed. Control of the electrical output of the transmitter can be achieved passively or by means of a feedback control system. A transmitter connected directly to a line can include an operator control and monitoring of current being supplied to a line to be located. Some transmitters include a current regulating circuit that controls current supplied to a line. In some transmitters, feedback controllers and feedback loops are used to regulate output current, voltage or power. Some control loops are based on monitoring currents in circuits; some control loops monitor power output from an inductive mode transmitter antenna. An inductively coupled transmitter with power output control is also disclosed.
摘要翻译：公开了一种用于线路定位器系统的发射器，其控制施加到目标线路的电流，电压或功率。发射机的电气输出的控制可以被动地或通过反馈控制系统来实现。直接连接到线路的发射器可以包括操作员控制和监视正在被提供给要被定位的线路的电流。一些发射器包括控制提供给线路的电流的电流调节电路。在某些变送器中，反馈控制器和反馈回路用于调节输出电流，电压或功率。一些控制回路基于电路中的监控电流; 一些控制回路监测来自感应模式发射器天线的功率输出。还公开了一种具有功率输出控制的电感耦合发射机。

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