公开(公告)号：US08316690B1

公开(公告)日：2012-11-27

申请号：US12705975

申请日：2010-02-15

申请人： Karl F. Kiefer ,  Doug Heerman ,  Brian Philpot ,  Christopher DePalm ,  Gulnara Roberson ,  Eric Krug

发明人： Karl F. Kiefer ,  Doug Heerman ,  Brian Philpot ,  Christopher DePalm ,  Gulnara Roberson ,  Eric Krug

IPC分类号： G01M7/00

CPC分类号： G01M7/00 ,  G01M5/0033 ,  G01M5/0091 ,  G01S5/06

摘要： A method and system for detecting hypervelocity impacts on a detection surface utilizes multiple sensors that directly measure electrical pulse radio frequency (RF) emissions generated by hypervelocity impacts on a detection surface and time of arrival (TOA) position measurements for determining the precise impact location on the detection surface. The detection surface material is compressed differentially in such a way that the inherent equalization of the compressed electron density in one area of the impact is directed to the uncompressed area of the material causing an electrical current that flows until the redistribution of the electrical charge has been completed and the rapid redistribution of charge and inherent current that results emits the radio frequency pulse that is induced into the detection surface.

摘要翻译： 用于检测对检测表面的超高速冲击的方法和系统利用多个传感器，其直接测量由检测表面上的超高速冲击产生的电脉冲射频（RF）发射和到达时间（TOA）位置测量，以确定精确影响位置 检测面。 检测表面材料被差分地压缩，使得冲击的一个区域中的压缩电子密度的固有均衡指向材料的未压缩区域，导致流动的电流直到电荷的再分配已经被 完成并且快速重新分配电荷和固有电流，从而产生被引入检测表面的射频脉冲。

公开(公告)号：US06810750B1

公开(公告)日：2004-11-02

申请号：US10393829

申请日：2003-03-20

申请人： Karl F. Kiefer ,  Kevin Champaigne ,  Eric Krug ,  Gulnara Ajupova

发明人： Karl F. Kiefer ,  Kevin Champaigne ,  Eric Krug ,  Gulnara Ajupova

IPC分类号： G01N2904

CPC分类号： G01L1/165 ,  G01N2291/02827

摘要： A passive SAW strain sensor for remotely sensing strain within a surface has a receiving SAW correlator with a signal input interdigitated transducer and a plurality of adjacent successive spaced interdigitated output transducers on a piezoelectric substrate, and a transmitting SAW correlator having a plurality of adjacent successive spaced interdigitated output transducers and a signal output interdigitated transducer on a piezoelectric substrate. The transmitting SAW correlator is affixed to or embedded in the surface such that its substrate will be stressed when the surface is strained and the receiving SAW correlator is not affixed to or embedded in the surface. The output transducers of the receiving SAW correlator and the transmitting SAW correlator are spatially placed to define a unique frequency of sensitivity, and their outputs are coupled together. A complex RF waveform signal applied to the receiving SAW correlator is transformed into an acoustic wave having a distinct output pulse that supplies power to the output transducers of the transmitting SAW correlator which is transformed into a complex RF output waveform. The application of stress on the transmitting SAW correlator shifts its center frequency proportionally and changes the frequency of the complex RF output waveform, and measurement of the center frequency change yields an indication of the applied stress.

摘要翻译： 用于在表面内远程感测应变的被动SAW应变传感器具有接收SAW相关器，其具有信号输入交叉换能器和在压电衬底上的多个相邻连续间隔的交错输出换能器，以及发射SAW相关器，具有多个相邻的相继间隔 交错输出传感器和压电基板上的信号输出交叉换能器。 传输SAW相关器固定在或嵌入在表面上，使得当表面被应变并且接收的SAW相关器不固定或嵌入在表面中时，其基片将受到应力。 接收SAW相关器和发射SAW相关器的输出换能器在空间上放置以定义唯一的灵敏度频率，并且它们的输出耦合在一起。 施加到接收SAW相关器的复合RF波形信号被变换为具有不同输出脉冲的声波，该输出脉冲向发射SAW相关器的输出换能器供电，该输出变换器被变换为复合RF输出波形。 应力在发射SAW相关器上的应用使其中心频率成比例地变化，并且改变复射频输出波形的频率，并且测量中心频率变化产生施加的应力的指示。

公开(公告)号：US5594176A

公开(公告)日：1997-01-14

申请号：US497775

申请日：1995-07-03

申请人： Karl F. Kiefer

发明人： Karl F. Kiefer

IPC分类号： G01N29/22 ,  G01N29/265 ,  G01N29/40 ,  G01R33/12

CPC分类号： G01N29/225 ,  G01N29/0672 ,  G01N29/069 ,  G01N29/265 ,  G01N29/40 ,  G01N2291/044 ,  G01N2291/101 ,  G01N2291/2636

摘要： An ultrasonic scan assembly for use in inspecting downhole gas pipes comprises a sensor section which rotates in relation to an end section that remains essentially level forming a rotating interface. The sensor section includes at least one ultrasonic transducer for transmitting interrogating pulses into a pipe wall and for receiving return pulses that are analyzed for determining the maintenance and repair needs of the gas pipe. Provided in the scan assembly is a rotary transformer for magnetically coupling signals, such as return pulse data or power, across the rotating interface of the scan assembly. The rotary transformer includes a primary winding on one section of the scan assembly and a secondary winding on another section of the scan assembly. The primary windings and secondary windings associated with respective sections of the scan assembly can be placed in parallel or concentric relationship.

摘要翻译： 用于检查井下气体管道的超声波扫描组件包括传感器部分，其相对于保持基本上水平的端部部分旋转，形成旋转界面。 传感器部分包括用于将询问脉冲发送到管壁中的至少一个超声换能器，并且用于接收分析用于确定气体管道的维护和修理需要的返回脉冲。 在扫描组件中提供的是用于在扫描组件的旋转界面上磁耦合诸如返回脉冲数据或功率的信号的旋转变压器。 旋转变压器包括在扫描组件的一个部分上的初级绕组和在扫描组件的另一部分上的次级绕组。 与扫描组件的相应部分相关联的初级绕组和次级绕组可以平行或同心地放置。

公开(公告)号：US5574223A

公开(公告)日：1996-11-12

申请号：US497032

申请日：1995-06-30

申请人： Karl F. Kiefer

发明人： Karl F. Kiefer

IPC分类号： G01N29/22 ,  G01N29/265 ,  G01N29/40 ,  G01N29/10 ,  G01N29/26

CPC分类号： G01N29/225 ,  G01N29/0672 ,  G01N29/069 ,  G01N29/265 ,  G01N29/40 ,  G01N2291/044 ,  G01N2291/101 ,  G01N2291/2636

摘要： An ultrasonic scan assembly is adapted to efficiently scan a surface and cross-section of a wall of an elongated cylindrical object. The ultrasonic scan assembly has a rotatable sensor section capable of rotating as the scan assembly is advanced axially along the elongated cylindrical object. In operation, the scan assembly is advanced in an axial direction along elongated cylindrical object, and the sensor section of the scan assembly is rotated so as to create a helical scan pattern. For at least a portion of the cylindrical object, the angular velocity of the sensor section is modulated. As a result, that portion of the cylindrical object is scanned at more than one scan rate.

摘要翻译： 超声波扫描组件适于有效地扫描细长圆柱形物体的壁的表面和横截面。 超声波扫描组件具有可旋转的传感器部分，当扫描组件沿着细长的圆柱形物体轴向前进时，该传感器部分能够旋转。 在操作中，扫描组件沿着细长的圆柱形物体在轴向方向前进，并且扫描组件的传感器部分被旋转以产生螺旋扫描图案。 对于圆柱形物体的至少一部分，传感器部分的角速度被调制。 结果，圆柱形物体的该部分以多于一个扫描速率被扫描。