专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4914975A Serpentine tube inspection positioning spine 失效
公开(公告)号：US4914975A
公开(公告)日：1990-04-10
申请号：US399036
申请日：1989-08-28
申请人： William E. Bailey , John H. Flora , Robert E. Womack
发明人： William E. Bailey , John H. Flora , Robert E. Womack
IPC分类号： F16C1/20
CPC分类号： F16C1/20 , F16C1/28 , Y10T74/20456
摘要： A serpentine tube inspection positioning spine formed from a plurality of identical links mated together. Each link has first and second bifurcated ends with the first end sized to fit within the second end of an adjacent link. Links are mated together by a pivot pin or axle which is accepted in a bore through the bifurcated ends. The second bifurcated end is provided with a substantially oval-shaped bore to allow sliding of the adjacent links relative to each other. Flat alignment faces on each end, with the first end having rounded corners, prevent buckling due to compressive forces during insertion while still allowing pivoting of the links for traveling through tubing bends.

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

US5426388A Remote tone burst electromagnetic acoustic transducer pulser 失效
标题翻译：遥控音猝发电磁声换能器脉冲发生器
公开(公告)号：US5426388A
公开(公告)日：1995-06-20
申请号：US196662
申请日：1994-02-15
申请人： John H. Flora , Daniel T. MacLaughlan
发明人： John H. Flora , Daniel T. MacLaughlan
IPC分类号： B06B1/02 , H03K3/57 , H03K17/567 , H03K3/00
CPC分类号： H03K17/567 , B06B1/0215 , H03K3/57
摘要： A remote tone burst pulser for an electromagnetic acoustic transducer utilizes a circuit having a direct current power source which is provided to a main capacitor. A high power, high speed insulated gate bipolar transistor or metal oxide-semiconductor controlled thyristor is operatively connected to the main capacitor and the coil of the transducer. A drive circuit is operatively connected to this device for transmitting a train of switch pulses which causes radio frequency alternating current to be provided to the transducer coil. A power transistor is operatively connected to the first transistor and is activated by a second drive circuit for causing a conducting state which allows for the power being applied to the transducer coil to be rapidly dissipated by a resistor and the internal resistance of the power transistor.
摘要翻译：用于电磁声换能器的远程音调脉冲发生器利用具有提供给主电容器的直流电源的电路。高功率，高速绝缘栅双极晶体管或金属氧化物半导体控制晶闸管可操作地连接到主电容器和换能器的线圈。驱动电路可操作地连接到该装置，用于传送一系列开关脉冲，其将射频交流电提供给换能器线圈。功率晶体管可操作地连接到第一晶体管，并被第二驱动电路激活，用于引起允许施加到换能器线圈的功率被电阻器快速耗散的功率晶体管的内部电阻的导通状态。

4. 发明授权

US4914973A Serpentine tube inspection positioning spine 失效
标题翻译：蛇形管检查定位脊柱
公开(公告)号：US4914973A
公开(公告)日：1990-04-10
申请号：US399035
申请日：1989-08-28
申请人： William E. Bailey , John H. Flora , Robert E. Womack
发明人： William E. Bailey , John H. Flora , Robert E. Womack
IPC分类号： F16C1/20
CPC分类号： F16C1/20 , F16C1/28 , Y10T74/20456
摘要： A serpentine tube inspection positioning spine formed from a plurality of identical links mated together. Each link has first and second bifurcated ends with the first end sized to fit within the second end of an adjacent link. Links are mated together by a pivot pin or axle which is accepted in a bore through the bifurcated ends. The second bifurcated end is provided with a substantially oval-shaped bore to allow sliding of the adjacent links relative to each other. Flat alignment faces on each end, with the first end having rounded corners, prevent buckling due to compressive forces during insertion while still allowing pivoting of the links for traveling through tubing bends.
摘要翻译：蛇形管检查定位脊由多个相同的链节组合在一起形成。每个连杆具有第一和第二分叉端，第一端和第二分叉端的尺寸适于安装在相邻连杆的第二端内。链节通过枢轴销或轴配合在一起，该枢轴销或轴通过分叉端接纳在孔中。第二分叉端设置有大致椭圆形的孔，以允许相邻链节相对于彼此滑动。每个端部上的平面对准面，其第一端具有圆角，防止由于插入期间的压缩力而产生弯曲，同时仍允许链节枢转以通过管道弯曲行进。

5. 发明授权

US4896555A Serpentine tube inspection positioning spine 失效
公开(公告)号：US4896555A
公开(公告)日：1990-01-30
申请号：US260161
申请日：1988-10-21
申请人： William E. Bailey , John H. Flora , Robert E. Womack
发明人： William E. Bailey , John H. Flora , Robert E. Womack
IPC分类号： F16C1/20
CPC分类号： F16C1/20 , F16C1/28 , Y10T74/20426
摘要： A serpentine tube inspection positioning spine formed from a plurality of identical links mated together. Each link has first and second bifurcated ends with the first end sized to fit within the second end of an adjacent link. Links are mated together by a pivot pin or axle which is accepted in a bore through the bifurcated ends. The second bifurcated end is provided with a substantially oval-shaped bore to allow sliding of the adjacent links relative to each other. Flat alignment faces on each end, with the first end having rounded corners, prevent buckling due to compressive forces during insertion while still allowing pivoting of the links for traveling through tubing bends.

6. 发明申请

US20100327858A1 Pipeline Inspection Tool with Double Spiral EMAT Sensor Array 有权
标题翻译：双螺旋EMAT传感器阵列管道检测工具
公开(公告)号：US20100327858A1
公开(公告)日：2010-12-30
申请号：US12642031
申请日：2009-12-18
申请人： James Simek , Jed Ludlow , John H. Flora , Syed M. Ali , Huidong Gao
发明人： James Simek , Jed Ludlow , John H. Flora , Syed M. Ali , Huidong Gao
IPC分类号： G01N27/82
CPC分类号： G01N27/87
摘要： A pipeline inspection tool includes two pole magnets oriented at an oblique angle relative to the central longitudinal axis of the tool body. An array of sensor coil sets is located between opposing edges of the two pole magnets and oriented perpendicular to the central longitudinal axis. Each sensor coil set includes a transmitter coil and two opposing pairs of receiver coils that are gated to receive reflections from the wall of a tubular member. Because the line of sensor coils is rotated relative to the magnetic bias field, the receiver coils are in-line with, and have the same angular orientation as, the transmitter coil. The tool provides improved sensitivity to small defects, substantial decrease in RF pulser power requirements, full circumferential coverage, self-calibration of the transmitted signals, and less interference between transmitter coils caused by acoustic ring around.
摘要翻译：管道检查工具包括相对于工具主体的中心纵向轴线倾斜定向的两个磁极。传感器线圈组的阵列位于两个极磁体的相对边缘之间并且垂直于中心纵向轴线定向。每个传感器线圈组包括发射器线圈和两个相对的接收器线圈对，其被门控以从管状构件的壁接收反射。因为传感器线圈的线相对于磁偏置场旋转，所以接收器线圈与发射器线圈成一直线并具有相同的角度定向。该工具提供对小缺陷的改进的灵敏度，RF脉冲发生器功率要求的显着降低，全周期覆盖，发射信号的自校准以及由环形周围引起的发射器线圈之间的较小干扰。

7. 发明授权

US06920792B2 Transducer guided wave electromagnetic acoustic 失效
标题翻译：传感器导波电磁声
公开(公告)号：US06920792B2
公开(公告)日：2005-07-26
申请号：US10429375
申请日：2003-05-05
申请人： John H. Flora , Charles M. Fields , Daniel P. Geier
发明人： John H. Flora , Charles M. Fields , Daniel P. Geier
IPC分类号： G01N29/00 , G01N29/04 , G01N29/24
CPC分类号： G01N29/2412 , G01N29/041 , G01N29/0645 , G01N2291/0422 , G01N2291/0423 , G01N2291/0427 , G01N2291/048 , G01N2291/2634
摘要： A guided wave electromagnetic acoustic transducer for detecting defects in moving metallic products such as rods, tubes and the like and which has coils energized by pulse of a few cycles of a high frequency alternating voltage which produces an alternating field in the product, the coils being alternately wound and connected in series and measuring dynamic acoustic stress that is a function of the radial distance from the center of the product being tested and produces a reading that is different than that showing a surface defect in the product.
摘要翻译：一种导波电磁声换能器，用于检测诸如杆，管等的金属产品的缺陷，并且具有通过在产品中产生交变场的高频交流电压的几个周期的脉冲激励的线圈，线圈是交替地卷绕并串联连接，并测量与被测产品中心的径向距离的函数的动态声学应力，产生与产品表面缺陷显示不同的读数。

8. 发明授权

US5689070A High temperature electromagnetic acoustic transducer (EMAT) probe and coil assemblies 失效
标题翻译：高温电磁换能器（EMAT）探头和线圈组件
公开(公告)号：US5689070A
公开(公告)日：1997-11-18
申请号：US506413
申请日：1995-07-24
申请人： Steven P. Clark , John H. Flora , Daniel T MacLauchlan
发明人： Steven P. Clark , John H. Flora , Daniel T MacLauchlan
IPC分类号： B06B1/04 , G01N29/22 , G01N29/24 , G01N29/04
CPC分类号： G01N29/228 , B06B1/04 , G01N29/2412 , G01N2291/0422
摘要： An enhanced EMAT probe and coil construction takes advantage of heat transfer and magnetic flux principles to permit inspection of workpieces at elevated temperatures of 1200.degree. F. and higher. A ferromagnetic, cup-shaped probe assembly having an end cap and a barrel is provided for carrying a coil assembly, preferably one or more permanent magnets, and a frustoconical focus core. The magnets are located within the barrel and connected to the end cap, and the cup-shaped probe assembly positions the coil assembly proximate the surface of the workpiece. A plurality of passageways may be provided in the end cap and barrel for admitting cooling air to an interior portion of the cup-shaped probe assembly. The cup-shaped probe assembly serves to provide a return path for magnetic flux of the magnetic field back to the permanent magnet means. The coil assembly has a coil disk having a matrix of holes and grooves which allow at least one eddy current coil wire to be threaded and interwoven into the coil disk without shorting against itself. A layer of fiberglass cloth covers the coil assembly to thermally and electronically insulate it from the workpiece, providing a durable, rugged and economical construction.
摘要翻译：增强的EMAT探头和线圈结构利用传热和磁通原理，允许在1200°F以上的高温下对工件进行检查。提供具有端盖和筒体的铁磁性杯形探针组件，用于承载线圈组件，优选地一个或多个永磁体和截头圆锥形聚焦芯。磁体位于筒内并连接到端盖，并且杯状探针组件将线圈组件定位在工件的表面附近。多个通道可以设置在端盖和筒中，用于将冷却空气引入杯状探针组件的内部。杯形探针组件用于提供磁场的磁通量返回到永磁体装置的返回路径。线圈组件具有线圈盘，其具有孔和凹槽的矩阵，其允许至少一个涡流线圈线被螺纹连接并且交织到线圈盘中而不会自身短路。一层玻璃纤维布覆盖线圈组件，以使其与工件热电子和电子绝缘，从而提供耐用，坚固耐用和经济的结构。

9. 发明授权

US5446382A Eddy current probe having one yoke within another yoke for increased inspection depth, sensitivity and discrimination 失效
标题翻译：涡流探头在另一个磁轭内具有一个磁轭，可增加检测深度，灵敏度和辨别力
公开(公告)号：US5446382A
公开(公告)日：1995-08-29
申请号：US81763
申请日：1993-06-23
申请人： John H. Flora
发明人： John H. Flora
IPC分类号： G01N27/90 , G01R33/12 , G01N27/82
CPC分类号： G01N27/902
摘要： Defects such as corrosion located on either the inner diameter or outer diameter of a covered metal component are detected through eddy current inspection. At least two concentric magnetizing yokes are held fixed with respect to each other and are scanned over the cover of the component. A magnetic flux sensor on the leg of each yoke detects changes in the magnetic flux that penetrates at different depth regions in the covered metal component, depending on the relative postion of each magnetizing yoke.
摘要翻译：通过涡流检查来检测位于被覆金属部件的内径或外径上的腐蚀等缺陷。至少两个同心磁化轭相对于彼此固定并且在组件的盖上扫描。每个轭的腿上的磁通量传感器根据每个磁化轭的相对位置检测穿透被覆金属部件中的不同深度区域的磁通量的变化。

10. 发明授权

US6125706A High temperature electromagnetic acoustic transducer 失效
标题翻译：高温电磁换能器
公开(公告)号：US6125706A
公开(公告)日：2000-10-03
申请号：US898851
申请日：1997-07-25
申请人： Jonathan D. Buttram , John H. Flora
发明人： Jonathan D. Buttram , John H. Flora
IPC分类号： B06B1/04 , G01N29/22 , G01N29/24 , G01N29/42 , G01N29/04
CPC分类号： G01N29/42 , B06B1/045 , G01N29/228 , G01N29/2412 , G01N2291/0422 , G01N2291/0423 , G01N2291/0427
摘要： An improved high temperature electromagnetic acoustic transducer (EMAT) for conducting inspections of materials with elevated temperatures, which has cooling means using gas cooling, such as air or nitrogen, for cooling the transducer RF coil, the onboard circuitry and magnets, while also providing for the easy removal of the coil and onboard circuitry. Prior art EMAT's are susceptible to failure since high temperatures reduces the signal quality of the electronics components, degrades the insulation of the RF coils, and permanent magnets can loose field strength.
摘要翻译：一种改进的高温电磁换能器（EMAT），用于对具有高温的材料进行检查，其具有使用气体冷却（例如空气或氮气）的冷却装置来冷却换能器RF线圈，车载电路和磁体，同时还提供容易地去除线圈和车载电路。现有技术的EMAT易受故障的影响，因为高温降低了电子部件的信号质量，降低了RF线圈的绝缘，并且永久磁铁可能会使磁场强度下降。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式