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1.发明授权System and method including a buried flexible sheet target impregnated with ferromagnetic particles and eddy current probe for determining proximity of a non-conductive underground structure 失效包括用于确定非导电性地下结构的临近的带有非线性颗粒和EDDY电流探测器的布置的柔性片材目标的系统和方法
公开(公告)号：US5200704A
公开(公告)日：1993-04-06
申请号：US662664
申请日：1991-02-28
摘要： Both a system and a method are provided which allows an eddy current probe to accurately determine both the proximity and dimensions of non-conductive structures which are normally invisible to such probes. The system includes a portable target medium that is movable into a known position with respect to the non-conductive structure, and that includes a conductive material that couples strongly with a fluctuating magnetic field, and a movable eddy current probe that emanates a fluctuating magnetic field and which generates a signal indicative of the magnitude of the interaction between the field and the portable target medium from which the distance between the two may be computed. The system may be used to determine the proximity of non-conductive structures such as plastic pipes that have been buried under ground, as well as the dimensions of such non conductive structures.
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公开(公告)号：US5161413A
公开(公告)日：1992-11-10
申请号：US666323
申请日：1991-03-08
IPC分类号： G01N29/22 , G01N29/265
CPC分类号： G01N29/265 , G01N29/223 , G01N2291/044
摘要： A device and method for guided testing of an object, and in particular, an internal structural component in an object, using non-destructive ultrasonic techniques is provided. A housing containing at least one ultrasonic transducer probe is adapted to be placed directly on the surface of the object to be tested. Eddy current probes are provided in the housing to guide the ultrasonic probe such that the ultrasonic energy will be directed at the appropriate internal structural design component of the object to be inspected. A microcomputer is then used to record the data obtained using ultrasonic signals and the position on the object using the information designed from the eddy current probes.
摘要翻译： 提供了一种用于使用非破坏性超声波技术来引导测试对象，特别是物体中的内部结构部件的装置和方法。 包含至少一个超声换能器探头的壳体适于直接放置在被测试物体的表面上。 涡流探针设置在壳体中以引导超声波探头，使得超声能量将被引导到待检查对象的适当的内部结构设计部件。 然后使用微型计算机使用由涡流探针设计的信息记录使用超声信号获得的数据和物体上的位置。
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3.发明授权System and method using portable wall engaging ferromagnetic particle impregnated target medium for electromagnetically measuring distance between oposing walls of a structure 失效使用便携式墙壁接合铁磁颗粒浸渍的目标介质的系统和方法用于电磁测量结构的施加壁之间的距离
公开(公告)号：US5373235A
公开(公告)日：1994-12-13
申请号：US38214
申请日：1993-03-29
摘要： Both a system and a method are provided which allows an eddy current probe to accurately determine both the proximity and dimensions of non-conductive structures which are normally invisible to such probes. The system comprises a portable target medium that is movable into a known position with respect to the non-conductive structure, and that includes a conductive material that couples strongly with a fluctuating magnetic field, and a movable eddy current probe that emanates a fluctuating magnetic field and which generates a signal indicative of the magnitude of the interaction between the field and the portable target medium from which the distance between the two may be computed. The system may be used to determine the proximity of non-conductive structures such as plastic pipes that have been buried under ground, as well as the dimensions of such non-conductive structures. When the system is applied to measure the dimensions of such a structure, the portable target medium assumes a form that is flexibly conformable to one of the walls of the structure and which is placed in abutting relationship thereto. The eddy current probe is then scanned against an opposing wall of the structure, whereby the width of the structure may be computed by measuring the strength of the interaction between the probe and the medium. In addition to measuring the dimensions of non-conductive structures, the system may be used to measure the dimensions of non-magnetic structures when the target medium includes a strongly magnetic material.
摘要翻译： 提供了一种系统和方法，其允许涡流探针精确地确定通常对这种探针不可见的非导电结构的接近度和尺寸。 该系统包括可移动到相对于非导电结构的已知位置的便携式目标介质，并且其包括强烈地与波动的磁场耦合的导电材料以及发出波动磁场的可移动涡流探针 并且其产生指示可以从其计算两者之间的距离的场和便携式目标介质之间的相互作用的大小的信号。 该系统可以用于确定非导电结构（例如埋在地下的塑料管）的接近度以及这种非导电结构的尺寸。 当该系统被应用于测量这种结构的尺寸时，便携式目标介质采用与该结构中的一个壁柔性地一致并且与其相邻置的形式。 然后将涡流探针扫过结构的相对壁，由此可以通过测量探针和介质之间的相互作用的强度来计算结构的宽度。 除了测量非导电结构的尺寸之外，当目标介质包括强磁性材料时，该系统可用于测量非磁性结构的尺寸。
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4.发明授权Diagnostic filter for detecting conductive and semiconductive particles in a fluid stream 失效用于检测流体流中的导电和半导体颗粒的诊断过滤器
公开(公告)号：US5061364A
公开(公告)日：1991-10-29
申请号：US470471
申请日：1990-01-26
CPC分类号： G01N15/0618 , B01D35/143
摘要： A diagnostic filter device for monitoring electrically conductive and semiconductive particles entrained by a fluid, composed of:a filter element (4) disposed to receive the fluid and to permit passage of the fluid while retaining particles entrained in the fluid;a component (8) disposed for producing an alternating electromagnetic field which extends across at least one region of the filter element (4); andan eddy current detecting instrument (12) connected to the electromagnetic field producing component (8) for detecting the influence on the field of particles in the filter element region.
摘要翻译： 一种用于监测由流体夹带的导电和半导电颗粒的诊断过滤装置，其由以下部分组成：过滤元件（4），其布置成接收流体并允许流体通过，同时保持夹带在流体中的颗粒; 设置成用于产生跨过过滤元件（4）的至少一个区域延伸的交变电磁场的部件（8）; 以及连接到所述电磁场产生部件（8）的涡流检测仪器（12），用于检测对过滤元件区域中的粒子的场的影响。
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5.发明授权Apparatus and method for providing a combined ultrasonic and eddy current inspection of a metallic body 失效一种用于提供金属体的超声波和涡流检测的装置和方法
公开(公告)号：US4955235A
公开(公告)日：1990-09-11
申请号：US369725
申请日：1989-06-23
申请人： Michael J. Metala , William G. Clark, Jr. , Warren R. Junker , Lee W. Burtner , Thomas E. Arzenti , Harold P. Johnson , Robert P. Vestovich , Bruce W. Bevilacqua
发明人： Michael J. Metala , William G. Clark, Jr. , Warren R. Junker , Lee W. Burtner , Thomas E. Arzenti , Harold P. Johnson , Robert P. Vestovich , Bruce W. Bevilacqua
IPC分类号： G01N27/90 , G01N29/22 , G01N29/265
CPC分类号： G01N29/265 , G01N27/902 , G01N27/9046 , G01N29/221 , G01N2291/044 , G01N2291/045 , G01N2291/048 , G01N2291/105 , G01N2291/2636
摘要： Both an apparatus and a method for simultaneously inspecting the walls of a tube with both ultrasonic and eddy current probes is disclosed herein. The apparatus generally comprises a cylindrical housing assembly insertable within the tube to be inspected, and a probe carrier rotatably mounted within and helically movable with respect to the housing. The probe carrier holds three ultrasonic probes for transmitting ultrasonic beams which are directly oriented radially, chordally, and axially with resepect to the longitudinal axis of the tube, as well as an eddy current probe for simultaneously inspecting the walls of the tube with electromagnetic lines of flux. The apparatus further includes a helical drive train formed from a lead screw assembly having a motor means, a drive shaft, and a drive sleeve for imparting a helical scanning motion to the probe carrier with respect to the housing. The interior of the drive sleeve is slidably engaged to the shaft which is in turn coupled to the output of the motor, while the outside of the drive sleeve is threadedly engaged to the interior of the housing. The probe carrier is in turn coupled to the drive sleeve. In the method of the invention, the data generated by the three eddy current probes is correlated with the data generated by the eddy current probe for each specific section of the tube, and displayed simultaneously to the system operator. The resulting complementary display of both ultrasonic and eddy current probe information allows the system operator to accurately determine the size, shape and nature of any flaws which may be present in the walls of the tube.
摘要翻译： 本文公开了一种用于同时检查具有超声波和涡流探针的管壁的装置和方法。 该装置通常包括可插入待检查的管内的圆柱形壳体组件和可旋转地安装在其内并相对于壳体螺旋移动的探针架。 探针架支撑三个超声波探头，用于传输超声波束，该超声波束直接径向，弦向和轴向定向到管的纵向轴线，以及涡流探针，用于同时用电磁线检测管的壁 助焊剂 该装置还包括由具有马达装置，驱动轴和驱动套筒的导螺杆组件形成的螺旋传动系，用于相对于壳体向探针支架施加螺旋扫描运动。 驱动套筒的内部可滑动地接合到轴，该轴又联接到马达的输出，而驱动套筒的外部螺纹地接合到壳体的内部。 探头托架又耦合到驱动套筒。 在本发明的方法中，由三个涡电流探头产生的数据与由涡流探针针对管的每个特定部分生成的数据相关，同时显示给系统操作者。 所得到的超声波和涡流探针信息的互补显示允许系统操作者准确地确定可能存在于管壁中的任何缺陷的尺寸，形状和性质。
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6.发明授权Apparatus and method for providing a combined ultrasonic and eddy current inspection of a tube 失效用于提供管的组合超声波和涡流检查的装置和方法
公开(公告)号：US4856337A
公开(公告)日：1989-08-15
申请号：US79860
申请日：1987-07-30
申请人： Michael J. Metala , William G. Clark, Jr. , Warren R. Junker , Lee W. Burtner , Thomas E. Arzenti , Harold P. Johnson , Robert P. Vestovich , Bruce W. Bevilacqua
发明人： Michael J. Metala , William G. Clark, Jr. , Warren R. Junker , Lee W. Burtner , Thomas E. Arzenti , Harold P. Johnson , Robert P. Vestovich , Bruce W. Bevilacqua
IPC分类号： G01N27/90 , G01N29/04 , G01N29/06 , G01N29/22 , G01N29/265 , G21C17/003
CPC分类号： G01N29/221 , G01N27/902 , G01N27/9046 , G01N29/0618 , G01N29/265 , G01N2291/02854 , G01N2291/044 , G01N2291/045 , G01N2291/048 , G01N2291/105 , G01N2291/2636
摘要： Both an apparatus and a method for simultaneously inspecting the walls of a tube with both ultrasonic and eddy current probes is disclosed herein. The apparatus generally comprises a cylindrical housing assembly insertable within the tube to be inspected, and a probe carrier rotatably mounted within and helically movable with respect to the housing. The probe carrier holds three ultrasonic probes for transmitting ultrasonic beams which are directly oriented radially, chordally, an axially with respect to the longitudinal axis of the tube, as well as an eddy current probe for simultaneously inspecting the walls of the tube with electromagnetic lines of flux. The apparatus further includes a helical drive train formed from a lead screw assembly having a motor means, a drive shaft, and a drive sleeve for imparting a helical scanning motion to the probe carrier with respect to the housing. The interior of the drive sleeve is slidably engaged to the shaft which is in turn coupled to the output of the motor, while the outside of the drive sleeve is threadedly engaged to the interior of the housing. The probe carrier is in turn coupled to the drive sleeve. In the method of the invention, the data generated by the three eddy current probes is correlated with the data generated by the eddy current probe for each specific section of the tube, and displayed simultaneously to the system operator. The resulting complementary display of both ultrasonic and eddy current probe information allows the system operator to accurately determine the size, shape and nature of any flaws which may be present in the walls of the tube.
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公开(公告)号：US4855677A
公开(公告)日：1989-08-08
申请号：US167289
申请日：1988-03-11
IPC分类号： G01N27/90
CPC分类号： G01N27/9046 , G01N27/904
摘要： An improved eddy current probe system and method for simultaneously detecting different types of flaws at different depths within a metallic wall, such as a section of Inconel tubing, is disclosed herein. The system comprises a current generator for generating alternating currents of substantially different frequencies, a probe head including first, second and third concentrically arranged coils in separate communication with the current generator, shielding material disposed between the coils for preventing cross talk between each coil and the pulsating magnetic field of the coils adjacent to it, and a detector circuit which may include an inductive bridge for providing an electrical output representative of the impedance changes in the respective coils. In operation, each of the coils conduct currents having substantially different frequencies, the highest frequency being conducted by the smallest-diametered coil and the lowest frequency being conducted by the largest-diametered coil. The different levels of magnetic field penetration provided by the coils as it is helically moved around the inside surface of a section on Inconel tubing not only allows the probe system to detect diverse kinds of flaws such as cracks, pits, or regions of thinning, but also flaws located at different depths throughout the tube wall. In the method of the invention, a computer is used to adjust the frequencies of the alternating currents conducted through the coils during the scanning operation in order to maximize the impedance changes in each coil, thereby maximizing the resolution of the probe system.
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公开(公告)号：US4746858A
公开(公告)日：1988-05-24
申请号：US2538
申请日：1987-01-12
CPC分类号： G01N27/9046
摘要： Rapid nondestructive testing of a ferromagnetic workpiece for creep damage is carried out by placing an eddy current coil adjacent to the workpiece, passing an alternating current through the coil, measuring the eddy current response as influenced by the workpiece, and comparing the current measurement to a current calibrated to known creep damage for the given ferromagnetic material. Correlations of the eddy current response to creep rate and time to failure are generated from creep rupture tests performed on specimens of the given material subjected to varying conditions of time, temperature and stress. Qualitative tests can also be performed to identify the point of greatest creep damage by passing the eddy current coil over the workpiece to find the location of the lowest eddy current response. Conventional creep damage tests can then be performed at that location if desired.
摘要翻译： 通过将涡电流线圈放置在工件附近，使交流电流通过线圈，测量受工件影响的涡流响应，并将电流测量值与一个电流测量值进行比较，进行用于蠕变损伤的铁磁性工件的快速非破坏性测试 电流根据已知的铁磁材料的蠕变损伤进行校准。 涡流响应对蠕变速率和故障时间的相关性是由对经受不同时间，温度和应力条件的给定材料的试样进行的蠕变断裂试验产生的。 也可以进行定性测试，以通过将涡流线圈通过工件以找到最低涡流响应的位置来识别最大蠕变损伤点。 如果需要，可以在该位置执行常规的蠕变损伤测试。
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9.发明授权Phased array ultrasonic inspection system for turbine and generator rotor bore 有权涡轮和发电机转子孔相控阵超声波检测系统公开(公告)号：US08438929B2
公开(公告)日：2013-05-14
申请号：US12874289
申请日：2010-09-02
IPC分类号： G01M13/00
CPC分类号： G01N29/07 , G01M13/00 , G01N29/223 , G01N29/2456 , G01N29/262 , G01N2291/0289 , G01N2291/106 , G01N2291/2636 , G01N2291/2693
摘要： A phased array ultrasonic testing system for examining discontinuities in turbine or generator rotor bores formed within turbine or generator rotors of a turbine or generator rotor assembly. The system includes a phased array ultrasonic transducer structured to be coupled to a surface of the rotor bore at a first location in order to emit an ultrasonic beam toward a second location of the rotor bore which is to be examined. The system further includes a control system with a computer and a controller for programming, emitting, and steering the ultrasonic beam via at least one, two-dimensional phased array transducer, thereby precisely and accurately inspecting the area of interest. Computer control of the beam permits the number of inspection locations and the number of different transducer wedges to be reduced providing for an efficient, timely inspection.
摘要翻译： 一种用于检查在涡轮或发电机转子组件的涡轮或发电机转子内形成的涡轮机或发电机转子孔中的不连续性的相控阵超声波测试系统。 该系统包括相控阵超声波换能器，该相控阵超声波换能器被构造成在第一位置处联接到转子孔的表面，以朝向待检查的转子孔的第二位置发射超声波束。 该系统还包括具有计算机和控制器的控制系统，用于经由至少一个二维相控阵转换器来编程，发射和转向超声波束，由此精确而准确地检查感兴趣的区域。 光束的计算机控制允许减少检查位置的数量和减少不同传感器楔块的数量，从而有效，及时地进行检查。
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公开(公告)号：US5029476A
公开(公告)日：1991-07-09
申请号：US404136
申请日：1989-09-07
CPC分类号： G01B17/02 , G01N2291/044
摘要： A system for determining the cross sectional profile of an object (24) having two opposed surfaces (26,28), includes:an ultrasonic transducer (16) having a reference surface (20) and arranged to emit and receive ultrasonic energy via the reference surface (20);a thickness determining unit (60) connected to the transducer (16) for causing the transducer (16) to emit ultrasonic energy via the reference surface (20) and for detecting reflected ultrasonic energy received by the transducer (16) via the reference surface (20) in order to derive indications of the distance between the reference surface (20) and an ultrasonic energy reflecting surface facing the reference surface (20);a carriage (2) supporting the transducer (16);a guide member (4) defining a linear travel path having a reference point and supporting the carriage (2) for movement along the travel path;a position determining unit (12,44,62) operatively associated with the carriage (2) for deriving an indication of the location of the carriage (2) along the travel path relative to the reference point;elements (32,34) for securing the guide member (4) to the object (24) so that the linear travel path extends along one of the two opposed surfaces (26); anda signal processing device (64) coupled to the thickness determining unit (60) and the position determining unit (12,44,62) for producing representations of the distance between the opposed surfaces (26,28) of the object (24) correlated with the location of the carriage (2) relative to the reference point when the reference surface (20) is in contact with one of the two opposed surfaces (26,28).
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