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1. 发明授权

US5526213A Ground fault protection for EMAT transistor switched magnet pulsers 失效
标题翻译： EMAT晶体管开关磁铁脉冲器的接地故障保护
公开(公告)号：US5526213A
公开(公告)日：1996-06-11
申请号：US285245
申请日：1994-08-03
申请人： Daniel T. MacLauchlan , Karl C. Henderson
发明人： Daniel T. MacLauchlan , Karl C. Henderson
IPC分类号： H02H3/16 , H02H3/26
CPC分类号： H02H3/16
摘要： A fast reacting ground fault interrupter circuit particularly suited for use with high current, high voltage DC pulses generated by transistor switched magnet pulsers driving pulsed electromagnets used with electromagnetic acoustic transducers (EMATs). Whenever a ground fault is detected, a digital shut off signal is sent to the transistor switched magnet pulser to shut it off and prevent transmission of the DC pulse. Additionally, the shut off signal is also provided to a DC current interrupter which shuts off power supplied to the transistor switched magnet pulser itself.
摘要翻译：特别适用于驱动与电磁声换能器（EMAT）一起使用的脉冲电磁铁的晶体管开关磁铁脉冲器产生的高电流，高压直流脉冲的快速反应接地故障断路器电路。每当检测到接地故障时，数字切断信号被发送到晶体管开关磁脉冲器，以将其关闭并防止DC脉冲的传输。此外，截止信号还提供给截止被提供给晶体管开关磁脉冲发生器本身的电力的直流电流断续器。

2. 发明授权

US5511424A Remote preamplifier and impedance matching circuit for electromagnetic acoustic transducer 失效
标题翻译：遥控前置放大器和阻抗匹配电路用于电磁换能器
公开(公告)号：US5511424A
公开(公告)日：1996-04-30
申请号：US196661
申请日：1994-02-15
申请人： Daniel T. MacLauchlan , Karl C. Henderson , John H. Flora
发明人： Daniel T. MacLauchlan , Karl C. Henderson , John H. Flora
IPC分类号： B06B1/02 , B06B1/04 , G01N29/22 , G01N29/24 , G01N29/34 , G01N29/36 , G01N29/04
CPC分类号： G01N29/34 , B06B1/0207 , B06B1/04 , G01N29/22 , G01N29/2412 , G01N29/36 , B06B2201/58
摘要： A preamplification and impedance matching circuit for an electromagnetic acoustic transducer includes an impedance matching section of the circuit having input terminals for receiving radio frequency power from a radio frequency power source. A matching transformer, which is a step-down transformer, is operatively connected to the input terminals. Diode networks are operatively connected to the matching transformer and output terminals which lead to the coil of the transducer. Signal responses emitted by the transducer coil are transmitted to a preamplifier section of the circuit. Choke coils or resistors are used to limit radio frequency power entry into the preamplifier section of the circuit. The preamplifier section has a preamplifier which is operatively connected to a first transformer and a second transformer such that the transformer are located on opposite sides of the preamplifier for increasing the amplitude of the coil signal response prior to transmission to detectors located in the instrumentation of the transducer.
摘要翻译：用于电磁声换能器的前置放大和阻抗匹配电路包括具有用于从射频电源接收射频功率的输入端的电路的阻抗匹配部分。作为降压变压器的匹配变压器可操作地连接到输入端子。二极管网络可操作地连接到匹配的变压器和输出端子，其通向换能器的线圈。由换能器线圈发出的信号响应被传送到电路的前置放大器部分。扼流线圈或电阻用于限制射频功率进入电路的前置放大器部分。前置放大器部分具有前置放大器，其可操作地连接到第一变压器和第二变压器，使得变压器位于前置放大器的相对侧，用于在传输到位于仪器的检测器中的检测器之前增加线圈信号响应的幅度传感器。

3. 发明授权

US5449958A Diode expander for electromagnetic acoustic transducer electronics 失效
标题翻译：二极管扩展器用于电磁换能器电子
公开(公告)号：US5449958A
公开(公告)日：1995-09-12
申请号：US272897
申请日：1994-07-08
申请人： Daniel T. MacLauchlan , Karl C. Henderson
发明人： Daniel T. MacLauchlan , Karl C. Henderson
IPC分类号： G01N29/22 , G01N29/24 , G01N29/36 , H02J3/06
CPC分类号： G01N29/36 , G01N29/22 , G01N29/2418 , Y10T307/297
摘要： An electrical circuit incorporating an improved diode expander network for an EMAT having a coil and a radio frequency power source which emits radio frequency power, and which blocks noise and interference while having the ability to operate at high frequencies and high current/power levels. A matching transformer having a primary side is operatively connected to the radio frequency source for receiving the radio frequency power. The transformer also has a secondary side having a first leg and a second leg. The matching transformer is normally a step-down transformer. A diode expander network is provided having a first pair of composite diodes connected in parallel with respect to each other to the first leg of the transformer, and a second pair of composite diodes connected in parallel with respect to each other to the second leg of the transformer. Each composite diode has a plurality of diodes arranged in a series and parallel relationship. One of the composite diodes in each pair is arranged to conduct electricity therethrough in a first direction while the other composite diode in each pair is arranged to conduct electricity therethrough in a second direction, opposite to the first direction.
摘要翻译：一种具有用于EMAT的改进的二极管扩展器网络的电路，其具有发射射频功率的线圈和射频电源，并且在具有在高频和高电流/功率电平下操作的能力的同时阻挡噪声和干扰。具有初级侧的匹配变压器可操作地连接到射频源以接收射频功率。变压器还具有具有第一腿和第二腿的次级侧。匹配变压器通常是降压变压器。提供二极管扩展器网络，其具有相对于彼此并联连接到变压器的第一支路的第一对复合二极管，以及相对于彼此并联连接到第二支路的第二对复合二极管变压器。每个复合二极管具有串联并联的多个二极管。每对中的复合二极管之一布置成在第一方向上导通电流，而每对中的另一复合二极管被布置成在与第一方向相反的第二方向上导电通过其中。

4. 发明授权

US6122969A Main bang recovery EMAT 有权
标题翻译：主要爆炸恢复EMAT
公开(公告)号：US6122969A
公开(公告)日：2000-09-26
申请号：US138620
申请日：1998-08-24
申请人： Daniel T. MacLauchlan , Jimmy W. Hancock
发明人： Daniel T. MacLauchlan , Jimmy W. Hancock
IPC分类号： B06B1/04 , G01N29/24
CPC分类号： G01N29/2412 , B06B1/045 , G01N2291/0422 , G01N2291/0423 , G01N2291/102
摘要： An EMAT arrangement utilizes separate transmitter and receiver EMATs which may each be connected to a tuning capacitor by a stripline cable. An electrostatic shield may also be provided between the coils and the coils can be offset from each other by 1/2 the pitch distance of sections in the coil. This reduces the duration of main bang, thus making it possible for the EMAT arrangement to detect structures which are very close to the coils.
摘要翻译： EMAT装置使用单独的发射器和接收器EMAT，其可以通过带状线缆连接到调谐电容器。也可以在线圈之间设置静电屏蔽，并且线圈可以通过+ E，fra 1/2 + EE彼此偏移，线圈中部分的间距距离。这减少了主爆的持续时间，从而使得EMAT装置可以检测非常接近线圈的结构。

5. 发明授权

US5684406A Electromagnetic acoustic transducer fault detection circuit 失效
标题翻译：电磁换能器故障检测电路
公开(公告)号：US5684406A
公开(公告)日：1997-11-04
申请号：US615754
申请日：1996-03-13
申请人： Daniel T. MacLauchlan , Kenneth R. Camplin , Bradley E. Cox , Daniel Geier
发明人： Daniel T. MacLauchlan , Kenneth R. Camplin , Bradley E. Cox , Daniel Geier
IPC分类号： G01R31/06 , G01R35/00
CPC分类号： G01R31/2829
摘要： A fault detecting circuit for use with an electromagnetic acoustic transducer having an electrostatic shield and a wear surface for determining when the wear surface for contacting test surfaces has developed holes.
摘要翻译：一种与具有静电屏蔽的电磁换能器一起使用的故障检测电路和用于确定何时用于接触测试表面的磨损表面已经形成空穴的磨损表面。

6. 发明授权

US5675087A Fastener characterization with an electromagnetic acoustic transducer 失效
标题翻译：紧固件表征与电磁声换能器
公开(公告)号：US5675087A
公开(公告)日：1997-10-07
申请号：US594051
申请日：1996-01-30
申请人： Daniel T. MacLauchlan , Wayne M. Latham , Steven P. Clark
发明人： Daniel T. MacLauchlan , Wayne M. Latham , Steven P. Clark
IPC分类号： G01L5/00 , F16B31/02 , G01H11/00 , G01L1/25 , G01L5/24 , G01M13/00 , G01N29/04 , G01N29/24
CPC分类号： G01L5/246 , G01L1/25 , G01N29/045 , G01N29/2412 , F16B2031/022 , G01N2291/011 , G01N2291/015 , G01N2291/02827 , G01N2291/0423 , G01N2291/044 , G01N2291/101 , G01N2291/2691 , G01N2291/2695
摘要： A device for measuring a load on a part and for monitoring the integrity of the part such as a bolt, comprises a socket having walls defining an interior space wherein the socket engages the bolt for transmitting a load to the bolt. An electromagnetic acoustic transducer comprising a magnet and a coil is located in the interior space of the socket near the bolt. The coil provides a current while the magnet provides a magnetic field such that the magnet and the coil generate an ultrasonic signal within the bolt. A detector is used to detect and measure a change in the ultrasonic signal at the bolt for measuring the load on the bolt and for detecting any flaws in the bolt.
摘要翻译：用于测量部件上的负载并用于监测诸如螺栓的部件的完整性的装置包括具有限定内部空间的壁的插座，其中插座接合用于将负载传输到螺栓的螺栓。包括磁体和线圈的电磁声换能器位于插座附近的螺栓的内部空间中。线圈提供电流，同时磁体提供磁场，使得磁体和线圈在螺栓内产生超声波信号。检测器用于检测和测量螺栓处的超声信号的变化，以测量螺栓上的负载并检测螺栓中的任何缺陷。

7. 发明授权

US5608691A EMAT with integral electrostatic shield 失效
标题翻译： EMAT带有整体静电屏蔽
公开(公告)号：US5608691A
公开(公告)日：1997-03-04
申请号：US503777
申请日：1996-07-18
申请人： Daniel T. MacLauchlan , Paul J. Latimer , Wayne M. Latham
发明人： Daniel T. MacLauchlan , Paul J. Latimer , Wayne M. Latham
IPC分类号： B06B1/04 , H04R23/00
CPC分类号： B06B1/04
摘要： A shield for an electromagnetic acoustic transducer (EMAT) has multiple layers of electrically insulating and electrically conductive materials which contain a coil of the EMAT. A first insulating layer lies directly on top of the coil and is attached thereto by a suitable layer of non-conductive adhesive. A second layer having both insulating and conductive portions is provided on a side of the coil opposite the first insulating layer such that the coil is completely encapsulated within and in direct contact only with the insulating portions of the first and second layers. The insulating portion of the second layer has a high electrical resistance. A third, conductive layer having a conductive adhesive side is provided in contact with the conductive portion of the second layer. The third layer is also provided with a window extending completely therethrough having dimensions coextensive with those of the coil; shielding of the coil itself by this third layer is thus prevented. Finally, a fourth insulating layer preferably made of a thin layer of ultrahigh molecular weight polyethylene or similar insulating material is attached to the underlying third, conductive layer by adhesive means.An alternative shield and coil arrangement is also disclosed, wherein the coil is etched on one side of a substrate and a corresponding shield configuration is etched on the other side, resulting in an integrated shield and coil assembly for use in an electromagnetic acoustic transducer.
摘要翻译：用于电磁声换能器（EMAT）的屏蔽件具有多层电绝缘和导电材料，其包含EMAT的线圈。第一绝缘层直接位于线圈的顶部，并通过合适的非导电粘合剂层附着在其上。具有绝缘和导电部分的第二层设置在与第一绝缘层相对的线圈的一侧上，使得线圈完全封装在第一和第二层的绝缘部分内并直接接触。第二层的绝缘部分具有高的电阻。具有导电粘合剂侧的第三导电层设置成与第二层的导电部分接触。第三层还设置有完全延伸的窗口，其具有与线圈的尺寸共同的尺寸; 因此防止了该第三层对线圈本身的屏蔽。最后，优选由超高分子量聚乙烯或类似绝缘材料的薄层制成的第四绝缘层通过粘合方式附着在下面的第三导电层上。还公开了另一种屏蔽和线圈装置，其中线圈在衬底的一侧被蚀刻，并且在另一侧蚀刻相应的屏蔽结构，从而形成用于电磁声换能器的集成屏蔽和线圈组件。

8. 发明授权

US4777824A Electromagnetic acoustic transducer 失效
标题翻译：电磁换能器
公开(公告)号：US4777824A
公开(公告)日：1988-10-18
申请号：US66772
申请日：1987-06-25
申请人： George A. Alers , Leigh R. Burns, Jr. , Daniel T. MacLauchlan
发明人： George A. Alers , Leigh R. Burns, Jr. , Daniel T. MacLauchlan
IPC分类号： B06B1/04 , G01N29/24 , G01N29/04
CPC分类号： G01N29/2412 , B06B1/04 , G01N2291/0234 , G01N2291/0423 , G01N2291/0427
摘要： A noncontact ultrasonic transducer for studying the acoustic properties of a metal workpiece includes a generally planar magnetizing coil positioned above the surface of the workpiece, and a generally planar eddy current coil between the magnetizing coil and the workpiece. When a large current is passed through the magnetizing coil, a large magnetic field is applied to the near-surface regions of the workpiece. The eddy current coil can then be operated as a transmitter by passing an alternating current therethrough to excite ultrasonic waves in the surface of the workpiece, or operated as a passive receiver to sense ultrasonic waves in the surface by measuring the output signal. The geometries of the two coils can be varied widely to be effective for different types of ultrasonic waves. The coils are preferably packaged in a housing which does not interfere with their operation, but protects them from a variety of adverse environmental conditions.
摘要翻译：用于研究金属工件的声学特性的非接触式超声换能器包括位于工件表面上方的大致平面的磁化线圈，以及位于磁化线圈和工件之间的大体平面的涡流线圈。当大电流通过磁化线圈时，大的磁场被施加到工件的近表面区域。涡流线圈然后可以通过使交流电流通过其来激发工件表面中的超声波，或者作为无源接收器操作，作为发射器，以通过测量输出信号来感测表面中的超声波。两个线圈的几何形状可以广泛地变化，以对于不同类型的超声波是有效的。线圈优选地包装在壳体中，其不干扰其操作，而是保护它们免受各种不利的环境条件的影响。

9. 发明授权

US08301401B2 Low profile encircling ultrasonic probe for the inspection of in-situ piping in immersion mode 有权
标题翻译：薄型环绕超声波探头，用于在浸入式模式下检查原位管道
公开(公告)号：US08301401B2
公开(公告)日：2012-10-30
申请号：US12873082
申请日：2010-08-31
申请人： Donald W. Morrison, Jr. , Daniel T. MacLauchlan , William C. Rutherford , Todd E. Mitton
发明人： Donald W. Morrison, Jr. , Daniel T. MacLauchlan , William C. Rutherford , Todd E. Mitton
IPC分类号： G01B17/00
CPC分类号： G01N29/265 , G01N29/262 , G01N29/28 , G01N2291/2634
摘要： An ultrasonic probe encircles the perimeter of a target component to be ultrasonically tested and has a base and a pair of jaws pivotally mounted to the base at opposite ends of an arcuate inner surface of the base to encircle a target component with arcuate inner surfaces of the jaws as well. The inner surfaces form a coupling fluid chamber with an outer surface of the target component. Front and rear sets of seals connected to and extending along front and rear portions of the arcuate inner surfaces seal the chamber so that it can retain a coupling fluid such as water. An arcuate set of ultrasonic transducers is connected along at least one but preferably all of the arcuate inner surfaces for transmitting ultrasonic signals to the coupling fluid chamber and into the target component.
摘要翻译：超声波探头环绕目标部件的周边进行超声波测试，并具有基座和一对夹爪，该基座和一对夹爪可枢转地安装在基座的弧形内表面的相对端处，以围绕目标部件，其中弧形内表面颚也是。内表面形成具有目标部件的外表面的耦合流体室。连接到弓形内表面的前部和后部并且沿弓形内表面的前部和后部延伸的前部和后部密封件密封室，使得其可以保持诸如水的耦合流体。一组超声波换能器沿着至少一个但优选全部的弓形内表面连接，用于将超声信号传输到耦合流体室并进入目标部件。

10. 发明申请

US20120053856A1 LOW PROFILE ENCIRCLING ULTRASONIC PROBE FOR THE INSPECTION OF IN-SITU PIPING IN IMMERSION MODE 有权
标题翻译：用于在浸没模式下检查现场管道的低剖面超声探头
公开(公告)号：US20120053856A1
公开(公告)日：2012-03-01
申请号：US12873082
申请日：2010-08-31
申请人： DONALD W. MORRISON, JR. , Daniel T. MacLauchlan , William C. Rutherford , Todd E. Mitton
发明人： DONALD W. MORRISON, JR. , Daniel T. MacLauchlan , William C. Rutherford , Todd E. Mitton
IPC分类号： G01N29/04
CPC分类号： G01N29/265 , G01N29/262 , G01N29/28 , G01N2291/2634
摘要： An ultrasonic probe encircles the perimeter of a target component to be ultrasonically tested and has a base and a pair of jaws pivotally mounted to the base at opposite ends of an arcuate inner surface of the base to encircle a target component with arcuate inner surfaces of the jaws as well. The inner surfaces form a coupling fluid chamber with an outer surface of the target component. Front and rear sets of seals connected to and extending along front and rear portions of the arcuate inner surfaces seal the chamber so that it can retain a coupling fluid such as water. An arcuate set of ultrasonic transducers is connected along at least one but preferably all of the arcuate inner surfaces for transmitting ultrasonic signals to the coupling fluid chamber and into the target component.
摘要翻译：超声波探头环绕目标部件的周边进行超声波测试，并具有基座和一对夹爪，该基座和一对夹爪可枢转地安装在基座的弧形内表面的相对端处，以围绕目标部件，其中弧形内表面颚也是。内表面形成具有目标部件的外表面的耦合流体室。连接到弓形内表面的前部和后部并且沿弓形内表面的前部和后部延伸的前部和后部密封件密封室，使得其可以保持诸如水的耦合流体。一组超声波换能器沿着至少一个但优选全部的弓形内表面连接，用于将超声信号传输到耦合流体室并进入目标部件。

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