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1. 发明授权

US5532598A Amorphous metal tagging system for underground structures including elongated particles of amorphous metal embedded in nonmagnetic and nonconductive material 失效
标题翻译：用于地下结构的无定形金属标签系统，包括嵌入在非磁性和非导电材料中的非晶金属的细长颗粒
公开(公告)号：US5532598A
公开(公告)日：1996-07-02
申请号：US248905
申请日：1994-05-25
申请人： William G. Clark, Jr. , Warren R. Junker , William A. Byers , John J. Herald , Rajender K. Sadhir
发明人： William G. Clark, Jr. , Warren R. Junker , William A. Byers , John J. Herald , Rajender K. Sadhir
IPC分类号： G01R33/02 , F16L1/024 , G01V3/00 , G01V15/00 , G01R19/00 , G01V3/08
CPC分类号： G01V15/00 , F16L1/11
摘要： An electromagnetic tagging system is provided for remotely detecting and locating polymeric and other non-conductive structures situated behind barriers, such as underground plastic pipes or containers. The system comprises a fluctuating magnetic field source, a pattern of tags embedded in discrete regions of the wall of the polymeric structure, each tag including an amorphous magnetic metal target for generating a Barkhausen response when exposed to the fluctuating magnetic field source, and a portable detection circuit movable along the ground or other control surface for remotely detecting the Barkhausen response. The amorphous magnetic material in each tag is preferably in the form of a plurality of elongated particles having aspect ratios of at least 3 to 1 and arranged end-to-end. The pattern that the tags are arranged in provide information concerning the identity, orientation, or extent of the structure, and the portable detection circuit is capable of detecting at least two of the tags simultaneously as it is moved over the surface of the ground so that the patterns of the tags may be easily determined.
摘要翻译：提供电磁标签系统用于远程检测和定位位于障碍物后面的聚合物和其他非导电结构，例如地下塑料管或容器。该系统包括波动的磁场源，嵌入在聚合物结构的壁的离散区域中的标签的图案，每个标签包括当暴露于波动的磁场源时产生巴克豪森响应的非晶磁性金属靶，以及便携式检测电路可沿地面或其他控制面移动，用于远程检测巴克豪森响应。每个标签中的无定形磁性材料优选为具有至少3比1的纵横比并且端对端布置的多个细长颗粒的形式。标签布置的图案提供关于结构的身份，方向或程度的信息，以及便携式检测电路能够在地面的表面上移动时同时检测至少两个标签，使得可以容易地确定标签的图案。

2. 发明授权

US5408883A Remotely operated diagnostic tube sampling device and method of sampling 失效
标题翻译：远程诊断管取样装置及取样方法
公开(公告)号：US5408883A
公开(公告)日：1995-04-25
申请号：US896014
申请日：1992-06-09
申请人： William G. Clark, Jr. , Warren R. Junker , James A. Begley , Richard J. Jacko , William A. Byers
发明人： William G. Clark, Jr. , Warren R. Junker , James A. Begley , Richard J. Jacko , William A. Byers
IPC分类号： B23H9/00 , F22B37/00 , G01N1/04 , G01N27/90 , G01N29/265 , G01N1/08 , G01N27/82 , G01N29/04 , G01N29/24
CPC分类号： F22B37/003 , B23H9/00 , G01N1/04 , G01N29/265 , G01N2291/02854 , G01N2291/2636 , G01N27/902 , Y10T29/49352 , Y10T29/5199
摘要： A robotic sampling device (32) for cutting part of a tube wall (12) for sampling, containing a cutting head (36), a retrieval assembly (38) and a drive mechanism (40), is used to cut a window or hole (60) in the tube wall (12) and retrieve the tube wall sample (56), where the sample can be mounted onto a separate tube for testing the physical properties of the cut wall portion, and where a video probe (62) and the like can be passed through the window (60) to monitor conditions near the support plates (14) and tube sheets (16).
摘要翻译：用于切割包含切割头（36），取出组件（38）和驱动机构（40）的用于取样的管壁（12）的一部分的机器人取样装置（32）用于切割窗口或孔（60），并且取回管壁样品（56），其中样品可以安装在单独的管上以测试切割壁部分的物理性质，并且其中视频探针（62）和类似物可以通过窗口（60）以监测支撑板（14）和管板（16）附近的状况。

3. 发明授权

US5272216A System and method for remotely heating a polymeric material to a selected temperature 失效
标题翻译：将聚合物材料远程加热至选定温度的系统和方法
公开(公告)号：US5272216A
公开(公告)日：1993-12-21
申请号：US635987
申请日：1990-12-28
申请人： William G. Clark, Jr. , Robert E. Shannon , Warren R. Junker
发明人： William G. Clark, Jr. , Robert E. Shannon , Warren R. Junker
IPC分类号： B29C35/08 , B29C65/00 , B29C65/14 , B29C65/36 , B29C65/42 , B29C65/48 , B29C67/24 , B29C70/58 , B29C70/88 , B29K101/10 , B29K105/16 , H05B6/02 , C08C19/04 , C08F8/06 , C08J3/28 , H05B6/64
CPC分类号： B29C70/88 , B29C35/08 , B29C65/14 , B29C65/1425 , B29C65/1435 , B29C65/1477 , B29C65/148 , B29C65/1483 , B29C65/3612 , B29C65/4835 , B29C65/4855 , B29C65/4875 , B29C65/5021 , B29C65/5057 , B29C66/1122 , B29C66/1142 , B29C66/43 , B29C66/81267 , B29C66/83411 , B29C66/83417 , B29C66/91411 , B29C66/9161 , B29C66/919 , B29C67/247 , B29C2035/0855 , B29C65/8207 , B29C65/8215 , B29C66/71 , B29C66/73921 , B29C66/9592 , B29K2909/08 , B29K2995/0008 , B29K2995/0027
摘要： Both a system and method are provided for remotely heating a polymeric material to a selected temperature. The system generally comprises particulate ferromagnetic material dispersed throughout the polymeric material to form a composite, wherein the particulate material has a Curie temperature that corresponds to the selected heating temperature, and a source of microwave energy for remotely applying a beam of microwave energy to the polymeric composite material. Preferably, the particulate ferromagnetic material comprises only about 2 percent of the total composite by weight. The polymeric material may be compliant, thermosettable plastic, and the Curie temperature of the particulate ferromagnetic material dispersed therein may advantageously be above the curing temperature of the polymer, such that the beam from the source of microwave energy may be used to remotely join surfaces or construct joints in composite structures. Alternatively, the polymeric material may be a meltable plastic, and the Curie temperature of the particulate ferromagnetic material may be chosen to be above the temperature of fusion of the polymer to create a polymeric composite which is magnetically separable from other polymers within a solid waste facility, and which may be melted down for recycling purposes. In a variation of this embodiment, a heat actuatable degradation chemical may be dispersed through the polymeric material along with the ferro-magnetic material to create a plastic composite which is selectively degradable by the remote application of microwave energy.

4. 发明授权

US4944185A System and method for qualitatively and nondestructively inspecting adhesive joints and other materials 失效
标题翻译：用于定性和非破坏性检查粘合剂接头和其他材料的系统和方法
公开(公告)号：US4944185A
公开(公告)日：1990-07-31
申请号：US298597
申请日：1989-01-17
申请人： William G. Clark, Jr. , Warren R. Junker
发明人： William G. Clark, Jr. , Warren R. Junker
IPC分类号： G01N29/12
CPC分类号： G01N29/12 , G01N29/2475 , G01N2291/0231 , G01N2291/0235 , G01N2291/02416 , G01N2291/0251
摘要： A system and method for nondestructively inspecting and monitoring materials that indicates the structural integrity of the material is disclosed. The inspection method includes the following steps. First, the material to be subsequently monitored, is tagged by dispersing a small amount of finely divided particles throughout the material. The tagged material is then applied in accordance with its application, such as adhesive material to two pieces to be joined to form an adhesive joint. When the adhesive joint or other material is to be inspected, the tagged particles are activated to cause an inherent structural resonance in the tagged material. The activation and structural resonance of the material is then monitored and measured with a probe. Finally, the structure resonance of the material is related to the structural integrity of the adhesive joint, the matrix-reinforcement interface integrity of a composite material, or the state of cure of a resin. The tagged particles may be ferromagnetic particles and the probe either an electromagnetic field coil and an actuator or an electromagnetic field coil and an acoustic emission probe. The tagged particles may be piezoelectric particles and the probe either an electric field and an acelerometer or an electric field and an acoustic emission probe. Alternately, the tagged particles may be acoustic impedance mismatch particles and the probe is an ultrasonic inspection probe.
摘要翻译：公开了一种用于非破坏性地检查和监测材料的系统和方法，其指示材料的结构完整性。检查方法包括以下步骤。首先，随后监测的材料通过在整个材料中分散少量细碎的颗粒来标记。然后根据其应用将标记的材料如粘合剂材料施加到两个待接合的部件以形成粘合剂接合部。当要检查粘合剂接头或其他材料时，标记的颗粒被活化以引起标记材料中固有的结构共振。然后用探针监测和测量材料的活化和结构共振。最后，材料的结构共振与粘合剂接头的结构完整性，复合材料的基体 - 增强界面完整性或树脂的固化状态有关。标记的颗粒可以是铁磁颗粒，探针也可以是电磁场线圈和致动器或电磁场线圈和声发射探头。标记的颗粒可以是压电颗粒，探针也可以是电场和加速度计或电场和声发射探头。替代地，标记的颗粒可以是声阻抗失配粒子，并且探针是超声波检查探针。

5. 发明授权

US4746858A Non destructive testing for creep damage of a ferromagnetic workpiece 失效
标题翻译：铁磁性工件蠕变损伤的无损检测
公开(公告)号：US4746858A
公开(公告)日：1988-05-24
申请号：US2538
申请日：1987-01-12
申请人： Michael J. Metala , William G. Clark, Jr. , Warren R. Junker
发明人： Michael J. Metala , William G. Clark, Jr. , Warren R. Junker
IPC分类号： G01N3/18 , G01N3/00 , G01N27/90 , G01R33/12 , G01N27/72
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。

6. 发明授权

US5391595A System and method for remotely heating a polymeric material to a selected temperature 失效
标题翻译：将聚合物材料远程加热至选定温度的系统和方法
公开(公告)号：US5391595A
公开(公告)日：1995-02-21
申请号：US205114
申请日：1994-03-03
申请人： William G. Clark, Jr. , Robert E. Shannon , Warren R. Junker
发明人： William G. Clark, Jr. , Robert E. Shannon , Warren R. Junker
IPC分类号： B29C35/08 , B29C65/00 , B29C65/14 , B29C65/36 , B29C65/42 , B29C65/48 , B29C67/24 , B29C70/58 , B29C70/88 , B29K101/10 , B29K105/16 , H05B6/02 , C08J3/28 , C08K3/22 , H05B6/64
CPC分类号： B29C70/88 , B29C35/08 , B29C65/14 , B29C65/1425 , B29C65/1435 , B29C65/1477 , B29C65/148 , B29C65/1483 , B29C65/3612 , B29C65/4835 , B29C65/4855 , B29C65/4875 , B29C65/5021 , B29C65/5057 , B29C66/1122 , B29C66/1142 , B29C66/43 , B29C66/81267 , B29C66/83411 , B29C66/83417 , B29C66/91411 , B29C66/9161 , B29C66/919 , B29C67/247 , B29C2035/0855 , B29C65/8207 , B29C65/8215 , B29C66/71 , B29C66/73921 , B29C66/9592 , B29K2909/08 , B29K2995/0008 , B29K2995/0027
摘要： Both a system and method are provided for remotely heating a polymeric material to a selected temperature. The system generally comprises particulate ferromagnetic material dispersed throughout the polymeric material to form a composite, wherein the particulate material has a Curie temperature that corresponds to the selected heating temperature, and a source of microwave energy for remotely applying a beam of microwave energy to the polymeric composite material. Preferably, the particulate ferromagnetic material comprises only about 2 percent of the total composite by weight. The polymeric material may be compliant, thermosettable plastic, and the Curie temperature of the particulate ferromagnetic material dispersed therein may advantageously be above the curing temperature of the polymer, such that the beam from the source of microwave energy may be used to remotely join surfaces or construct joints in composite structures. Alternatively, the polymeric material may be a meltable plastic, and the Curie temperature of the particulate ferromagnetic material may be chosen to be above the temperature of fusion of the polymer to create a polymeric composite which is magnetically separable from other polymers within a solid waste facility, and which may be melted down for recycling purposes. In a variation of this embodiment, a heat actuatable degradation chemical may be dispersed through the polymeric material along with the ferro-magnetic material to create a plastic composite which is selectively degradable-by the remote application of microwave energy.
摘要翻译：提供了一种系统和方法用于将聚合物材料远程加热到所选择的温度。该系统通常包括分散在整个聚合物材料中以形成复合材料的颗粒铁磁材料，其中颗粒材料具有对应于所选择的加热温度的居里温度，以及用于将微波能量束远程施加到聚合物复合材料。优选地，颗粒状铁磁材料仅占总重量的约2％。聚合物材料可以是顺应性的，可热固化的塑料，并且其中分散在其中的颗粒状铁磁材料的居里温度可以有利地高于聚合物的固化温度，使得来自微波能量的束可以用于远程连接表面或在复合结构中构造接头。或者，聚合物材料可以是可熔融塑料，并且颗粒状铁磁材料的居里温度可以被选择为高于聚合物的熔融温度以产生可与固体废物设施内的其它聚合物磁分离的聚合物复合材料，并可能被融化用于回收目的。在该实施方案的变型中，可热致动的降解化学品可以与铁磁性材料一起分散通过聚合材料，以产生通过远程施加微波能量而可选择性降解的塑料复合材料。

7. 发明授权

US5317045A System and method for remotely heating a polymeric material to a selected temperature 失效
标题翻译：将聚合物材料远程加热至选定温度的系统和方法
公开(公告)号：US5317045A
公开(公告)日：1994-05-31
申请号：US42588
申请日：1993-04-05
申请人： William G. Clark, Jr. , Robert E. Shannon , Warren R. Junker
发明人： William G. Clark, Jr. , Robert E. Shannon , Warren R. Junker
IPC分类号： B29C35/08 , B29C65/00 , B29C65/14 , B29C65/36 , B29C65/42 , B29C65/48 , B29C67/24 , B29C70/58 , B29C70/88 , B29K101/10 , B29K105/16 , H05B6/02 , C08J3/28 , B32B31/28 , H05B6/64
CPC分类号： B29C70/88 , B29C35/08 , B29C65/14 , B29C65/1425 , B29C65/1435 , B29C65/1477 , B29C65/148 , B29C65/1483 , B29C65/3612 , B29C65/4835 , B29C65/4855 , B29C65/4875 , B29C65/5021 , B29C65/5057 , B29C66/1122 , B29C66/1142 , B29C66/43 , B29C66/81267 , B29C66/83411 , B29C66/83417 , B29C66/91411 , B29C66/9161 , B29C66/919 , B29C67/247 , B29C2035/0855 , B29C65/8207 , B29C65/8215 , B29C66/71 , B29C66/73921 , B29C66/9592 , B29K2909/08 , B29K2995/0008 , B29K2995/0027
摘要： Both a system and method are provided for remotely heating a polymeric material to a selected temperature. The system generally comprises particulate ferromagnetic material dispersed throughout the polymeric material to form a composite, wherein the particulate material has a Curie temperature that corresponds to the selected heating temperature, and a source of microwave energy for remotely applying a beam of microwave energy to the polymeric composite material. Preferably, the particulate ferromagnetic material comprises only about 2 percent of the total composite by weight. The polymeric material may be compliant, thermosettable plastic, and the Curie temperature of the particulate ferromagnetic material dispersed therein may advantageously be above the curing temperature of the polymer, such that the beam from the source of microwave energy may be used to remotely join surfaces or construct joints in composite structures. Alternatively, the polymeric material may be a meltable plastic, and the Curie temperature of the particulate ferromagnetic material may be chosen to be above the temperature of fusion of the polymer to create a polymeric composite which is magnetically separable from other polymers within a solid waste facility, and which may be melted down for recycling purposes. In a variation of this embodiment, a heat actuatable degradation chemical may be dispersed through the polymeric material along with the ferromagnetic material to create a plastic composite which is selectively degradable by the remote application of microwave energy.
摘要翻译：提供了一种系统和方法用于将聚合物材料远程加热到所选择的温度。该系统通常包括分散在整个聚合物材料中以形成复合材料的颗粒铁磁材料，其中颗粒材料具有对应于所选择的加热温度的居里温度，以及用于将微波能量束远程施加到聚合物复合材料。优选地，颗粒状铁磁材料仅占总重量的约2％。聚合物材料可以是顺应性的，可热固化的塑料，并且其中分散在其中的颗粒状铁磁材料的居里温度可以有利地高于聚合物的固化温度，使得来自微波能量的束可以用于远程连接表面或在复合结构中构造接头。或者，聚合物材料可以是可熔融塑料，并且颗粒状铁磁材料的居里温度可以被选择为高于聚合物的熔融温度以产生可与固体废物设施内的其它聚合物磁分离的聚合物复合材料，并可能被融化用于回收目的。在该实施方案的变体中，可热致动的降解化学物质可以与铁磁材料一起分散通过聚合物材料，以产生通过远程施加微波能量可选择性降解的塑料复合材料。

8. 发明授权

US5161413A Apparatus and method for guided inspection of an object 失效
标题翻译：用于引导检查物体的装置和方法
公开(公告)号：US5161413A
公开(公告)日：1992-11-10
申请号：US666323
申请日：1991-03-08
申请人： Warren R. Junker , Michael J. Metala , William G. Clark, Jr.
发明人： Warren R. Junker , Michael J. Metala , William G. Clark, Jr.
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。

9. 发明授权

US4955235A Apparatus and method for providing a combined ultrasonic and eddy current inspection of a metallic body 失效
标题翻译：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。

10. 发明授权

US4856337A Apparatus and method for providing a combined ultrasonic and eddy current inspection of a tube 失效
标题翻译：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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