公开(公告)号：US20040239329A1

公开(公告)日：2004-12-02

申请号：US10250030

申请日：2003-05-29

发明人： Eldad Haber ,  Ping Zhang

IPC分类号： G01V003/18 ,  G01V003/10

CPC分类号： G01V3/26

摘要： A method is disclosed for locating a receiver in a borehole having a conductive liner by inducing an electromagnetic field from a transmitter in a first borehole, detecting at a first location by at least one receiver located in a second borehole having a conductive liner, a first electromagnetic field induced by the transmitter, detecting at a second location by the at least one receiver, a second electromagnetic field induced by the transmitter and calculating a set of geometry coordinates for the first location based on the first electromagnetic field and the second electromagnetic field.

摘要翻译： 公开了一种用于将接收器定位在具有导电衬套的钻孔中的方法，该接收器通过在第一钻孔中从发射器感应电磁场，在第一位置处由位于具有导电衬套的第二钻孔中的至少一个接收器检测第一 由所述发射机感应的电磁场，由所述至少一个接收机在第二位置处检测由所述发射机感应的第二电磁场，并基于所述第一电磁场和所述第二电磁场计算所述第一位置的一组几何坐标。

公开(公告)号：US20040183537A1

公开(公告)日：2004-09-23

申请号：US10843719

申请日：2004-05-11

发明人： Anne Kelley

IPC分类号： G01V003/10 ,  G01V003/11

CPC分类号： G01V3/104

摘要： A metal detector having a plurality of phase delay discrimination regions with corresponding selectable exception spaces therein. A metal detector for indicating the presence of a metal target, comprising a transmitting module for transmitting a time-varying electromagnetic wave to the target, a receiving module for receiving said wave as modified by the target, an analyzing module for determining the phase delay of the modified said wave and providing a characterization to a user of the target based on said phase delay, said analyzing module being further adapted in a normal mode of operation of the metal detector to report said characterization to the user in a circumstance (a) wherein said phase delay exceeds a predetermined discrimination level and to not report said characterization to the user in a circumstance (b) wherein said phase delay does not exceed said discrimination level, and an exception space circuit cooperating with said analyzing module for comparing said phase delay with a limited range of one or more predetermined values for said phase delay and, in a first exception space mode of operation of the metal detector, causing said analyzing module to not report said characterization in said circumstance (a) when said range of values exceeds said discrimination level and, in a second exception space mode of operation of the metal detector, report said characterization in circumstance (b) wherein said range of values does not exceed said discrimination level, is provided.

摘要翻译： 一种具有多个相位延迟识别区域的金属检测器，其中具有相应的可选异常空间。 一种用于指示金属靶的存在的金属检测器，包括用于向目标发送时变电磁波的发送模块，用于接收由目标修改的所述波的接收模块，用于确定目标的相位延迟的分析模块 所述修改的所述波并且基于所述相位延迟向所述目标的用户提供表征，所述分析模块还在所述金属检测器的正常操作模式下进一步适应以在（a）的情况下向所述用户报告所述表征，其中 所述相位延迟超过预定的识别电平，并且在所述相位延迟不超过所述鉴别电平的情况下（b）的情况下不向用户报告所述表征，以及与所述分析模块协作的异常空间电路，用于将所述相位延迟与 用于所述相位延迟的一个或多个预定值的有限范围，以及在第一异常空间操作模式中 在所述情况下（a）当所述值的范围超过所述鉴别水平时，所述分析模块不报告所述表征，并且在所述金属检测器的第二异常空间操作模式中，在所述情况下（ b）其中所述值的范围不超过所述鉴别水平。

公开(公告)号：US20030107377A1

公开(公告)日：2003-06-12

申请号：US10303041

申请日：2002-11-22

发明人： Mustafa Uzman

IPC分类号： G01V003/08 ,  G01V003/10

CPC分类号： G01V3/101

摘要： The invention relates to a metal detector with at least one driver circuit 2, at least one transmitter winding 4 having two external terminals 4a, b, and at least one receiver winding 5 having two external terminals 5a, b. The efficiency is increased in comparison to conventional metal detectors by providing at least one tap subdividing the transmitter winding 4, whereby a transformed electrical AC voltage is provided at the external terminals 4a, b of the transmitter winding 4 by the driver circuit via the tap 4c.

摘要翻译： 本发明涉及具有至少一个驱动电路2的至少一个发射器绕组4的金属检测器，具有两个外部端子4a，b的至少一个发射器绕组4和具有两个外部端子5a，b的至少一个接收器绕组5。 通过提供至少一个细分发射器绕组4的抽头，与传统的金属检测器相比，提高了效率，从而在变送器绕组4的外部端子4a，b处通过驱动电路经由分接头4c 。

公开(公告)号：US20030102868A1

公开(公告)日：2003-06-05

申请号：US10001854

申请日：2001-11-20

发明人： Guenter W. Brune ,  John E. Mercer ,  Albert W. Chau

IPC分类号： G01V003/08 ,  G01V003/10

CPC分类号： G01V3/08 ,  E21B7/04 ,  E21B47/024 ,  G01V3/081

摘要： Tracking a boring tool is performed within an underground region using a locating signal. The boring tool is moved through the ground during a series of distance movements such that potential movement of the boring tool during any one of the distance movements is less than a maximum movement value. A current positional relationship is determined for a current one of the distance movements based on: a last-determined positional relationship established for an immediately preceding one of the distance movements, certain orientation parameters, the maximum movement value and the determined signal strength of the locating signal in the current positional relationship. Target coordinates are accepted and a target position, based on the target coordinates, is included as part of the current positional relationship. The position of the target is unconstrained with respect to system geometry. Steering command features are provided along with steering warnings.

摘要翻译： 使用定位信号在地下区域内执行钻孔工具的跟踪。 钻孔工具在一系列距离移动期间移动通过地面，使得镗孔工具在任何一个距离移动期间的潜在运动小于最大移动值。 基于以下方式确定当前位置关系：对于距离移动之前的一个建立的最终确定的位置关系，确定方向参数，最大移动值和确定的定位信号强度 信号处于当前位置关系。 目标坐标被接受，并且基于目标坐标的目标位置被包括在当前位置关系的一部分中。 目标的位置相对于系统几何是不受约束的。 提供转向指令功能以及转向警告。

公开(公告)号：US20020093338A1

公开(公告)日：2002-07-18

申请号：US10074349

申请日：2002-02-11

发明人： Mark D. Rowan

IPC分类号： G01V003/08 ,  G01V003/10

CPC分类号： G01V3/104

摘要： A method and apparatus for distinguishing metal objects employing multiple frequency interrogation. In one aspect, the method includes interrogating a target with at least two frequencies, obtaining respective response signals for the two frequencies, resolving the response signals into at least respective resistive component portions, comparing the magnitudes of at least two of the resistive component portions, selecting one response signal from among the response signals based on the comparison, and characterizing the target with the selected response signal. In other aspects, the method includes obtaining response data by interrogating the target at at least two frequencies, normalizing the response data and comparing the normalized response data. A signal is provided indicating the extent of any disagreement in the normalized response data.

摘要翻译： 一种用于区分采用多频询问的金属物体的方法和装置。 在一个方面，该方法包括以至少两个频率询问目标，获得两个频率的相应响应信号，将响应信号分解成至少相应的电阻分量部分，比较至少两个电阻分量部分的幅度， 基于比较从响应信号中选择一个响应信号，并用所选择的响应信号表征目标。 在其他方面，该方法包括通过以至少两个频率询问目标来获得响应数据，对响应数据进行归一化并比较归一化响应数据。 提供的信号指示归一化响应数据中任何不一致的程度。

公开(公告)号：US20020047709A1

公开(公告)日：2002-04-25

申请号：US09931994

申请日：2001-08-17

发明人： Richard William Fling

IPC分类号： G01V003/08 ,  G01V003/10

CPC分类号： G01V3/104 ,  G01V3/15

摘要： An excavator vehicle has sensors thereon at different heights. Each sensor may have a coil which is generally horizontal and which detects the magnetic field generated by a current in a buried conductor. By detecting the relative magnitudes of the component of the field parallel to the ground, as detected by the sensors, it is possible to determine whether or not the excavator vehicle is proximate the buried conductor. A warning may be generated, or the excavating tool of the excavator vehicle controlled, to prevent the excavating tool damaging the buried conductor.

摘要翻译： 挖掘机车辆在其上具有不同高度的传感器。 每个传感器可以具有大致水平的线圈，并且其检测由掩埋导体中的电流产生的磁场。 通过检测由传感器检测到的平行于地面的场的分量的相对大小，可以确定挖掘机车辆是否靠近埋地导体。 可能会产生警告，或者挖掘机车辆的挖掘工具受到控制，以防止挖掘工具损坏埋地导体。

公开(公告)号：US20020030492A1

公开(公告)日：2002-03-14

申请号：US09928632

申请日：2001-08-13

发明人： Yanping Guo ,  Harvey W. Ko ,  Carl V. Nelson ,  David M. White

IPC分类号： G01V003/10

CPC分类号： G01V3/15 ,  G01V3/12

摘要： A unique time-domain electromagnetic system and data processing technique which, using low frequency electromagnetic fields, can localize, in three-dimensions, the position of buried metallic objects is disclosed. The measurement system uses time-domain electromagnetic techniques on a scanning frame similar to a X-Y plotter. The system collects magnetic data over a large area above the buried object. The spatial information of the field detected on the ground is then processed with an unique nullnearfield holographicnull data processing method to reconstruct the field image of the buried object.

摘要翻译： 公开了一种使用低频电磁场的独特的时域电磁系统和数据处理技术，可以三维定位埋藏金属物体的位置。 测量系统在类似于X-Y绘图仪的扫描框架上使用时域电磁技术。 该系统在掩埋物体上方的大面积上收集磁性数据。 然后用独特的“近场全息”数据处理方法处理在地面上检测到的场的空间信息，以重建被埋物体的场图像。

公开(公告)号：US20020017905A1

公开(公告)日：2002-02-14

申请号：US09879252

申请日：2001-06-12

发明人： Ugo Conti

IPC分类号： G01V003/10 ,  G01V003/18

CPC分类号： G01V3/28

摘要： An electromagnetic tomography system for determining properties of geological formation penetrated by at least one borehole lined with a conductive tubular includes a transmitter disposed in a first borehole and adapted to induce a magnetic field, a first receiver disposed in the first borehole and adapted to detect a magnetic field induced in the conductive tubular by the transmitter, and a second receiver adapted to detect a magnetic field induced in the geological formation by the transmitter. A method for determining a conductive tubular correction constant includes generating a magnetic field inside a representative piece of the conductive tubular, determining a first magnetic field amplitude inside the representative piece of the conductive tubular at a location proximate to a position of the generating a magnetic field, determining a second magnetic field amplitude outside the representative piece of the conductive tubular, and deriving the conductive tubular correction constant from a ratio of the first magnetic field amplitude and the second magnetic field amplitude.

摘要翻译： 用于确定穿过由导电管状物排列的至少一个钻孔的地质构造的性质的电磁层析成像系统包括设置在第一钻孔中并适于诱导磁场的发射器，设置在第一钻孔中的第一接收器， 通过发射器在导电管中感应的磁场，以及适于检测由发射器在地质构造中感应出的磁场的第二接收器。 用于确定导电管状校正常数的方法包括在导电管的代表性片段内产生磁场，确定导电管的代表性片内的第一磁场振幅在靠近产生磁场的位置的位置 确定导电管状件的代表性片外的第二磁场振幅，并从第一磁场振幅和第二磁场振幅的比值导出导电管状校正常数。

公开(公告)号：US20030184301A1

公开(公告)日：2003-10-02

申请号：US10114235

申请日：2002-04-02

发明人： Miroslav Bosnar

IPC分类号： G01V003/10

CPC分类号： G01V3/104

摘要： A conductivity meter for measuring conductivity of terrain, including a first transmitter coil, a signal generator connected to the first transmitter coil to supply a time-varying current thereto for inducing eddy currents in the terrain, a first receiver coil horizontally spaced from the first transmitter coil, a temperature sensing device for measuring temperature, and a signal processor, including a memory storing a plurality of temperature dependent correction values, for isolating from a signal received by the first receiver coil a secondary signal representative of a secondary magnetic field generated in the terrain by the eddy currents, and determining an apparent terrain conductivity based on the isolated secondary signal and a selected temperature dependent correction value selected from the stored temperature dependent correction values according to a measured temperature received from the temperature sensing device.

摘要翻译： 一种用于测量地形的电导率的电导仪，包括第一发射器线圈，连接到第一发射器线圈的信号发生器，以向其提供时变电流以用于在地形中引起涡流;第一接收器线圈，与第一发射器水平间隔开 线圈，用于测量温度的温度感测装置，以及包括存储多个温度相关校正值的存储器的信号处理器，用于与由第一接收器线圈接收的信号隔离，代表在第一接收器线圈中产生的次级磁场的次级信号 并且根据从温度感测装置接收到的测量温度，基于隔离次级信号和从存储的温度依赖校正值中选择的选择的温度相关校正值来确定表观地形电导率。

公开(公告)号：US20030052684A1

公开(公告)日：2003-03-20

申请号：US10181471

申请日：2002-07-17

发明人： Carl V Nelson ,  Dexter G Smith ,  Charles B Cooperman

IPC分类号： G01V003/08 ,  G01V003/10

CPC分类号： G01V3/104 ,  G01V3/105 ,  G01V3/15 ,  G06K9/3241

摘要： A time-domain electromagnetic target discriminator (ETD) sensor system and method are provided capable of measuring a metal target's time decay response based on the physical parameters of the metal target and its environment and for identifying the metal target. The ETD sensor system includes a pulse transmitter connected to a receiver via a data acquisition and control system. The transmitter and receiver include coil configurations for placement in proximity to a visually obscured, e.g., buried, metal target (or underground void) for inducing eddy currents within the metal target. The ETD sensor system measures the eddy current time decay response of the metal target in order to perform target recognition and classification. The identification process entails comparing the metal target's (or, underground void or other object's) time decay response with a library of normalized object signatures, e.g., time decay responses and other characteristics.

摘要翻译： 提供了一种时域电磁目标鉴别器（ETD）传感器系统和方法，其能够基于金属靶及其环境的物理参数并用于识别金属靶来测量金属靶的时间衰减响应。 ETD传感器系统包括通过数据采集和控制系统连接到接收器的脉冲发射器。 发射器和接收器包括用于放置在视觉上遮蔽的例如埋置的金属靶（或地下空隙）附近的线圈构造，用于在金属靶内诱发涡流。 ETD传感器系统测量金属目标的涡流时间衰减响应，以执行目标识别和分类。 识别过程需要将金属目标（或地下空隙或其他物体）的时间衰减响应与归一化对象签名的库（例如时间衰减响应和其他特性）进行比较。