公开(公告)号：US4656416A

公开(公告)日：1987-04-07

申请号：US637426

申请日：1984-08-03

Applicant: Laurence C. Brasfield

Inventor： Laurence C. Brasfield

IPC: G01R31/02 ,  G01R31/08

CPC classification number: G01R31/025

Abstract: A first process is used to identify the second circuit to which the shorted circuit is connected. A low-level, A.C. potential is imposed between the node known to be shorted and a common trace. A high impedance probe is scanned over the circuits at a distance. The potential detected is filtered and compared with the impressed potential. The result is filtered, amplified, and synchronously demodulated and the result displayed.The second process is used to locate the site of the short. A low-level AC current is injected between two shorted traces. Points along the traces are contacted by a high impedance probe. The signal is filtered and compared with the impressed potential. The result of the comparison is further filtered, amplified, synchronously demodulated and the result displayed.A shorts locator is under the control of a central processing unit. Clips permit connection to the system under test. The clip potentials are monitored. A high impedence probe circuit which includes filtering and buffering circuitry, provides an output signal which compared to probe circuitry potentials. An excitation circuit provides and AC test signal applied by means of the clips. The probe and clip circuitry potentials are passed through a narrow bandpass amplifier. The resulting signal is demodulated by an intergrator which has synchronously reversed polarity. The output is passed through an analog to digital converter and passed to the central processor for processing and display.

Abstract translation: 第一个过程用于识别短路电路所连接的第二个电路。 在已知短路节点和常见线路之间施加低电平的交流电位。 高电阻探头在远处扫描电路。 检测到的电位被过滤并与印象电位进行比较。 结果被滤波，放大和同步解调，并显示结果。 第二个过程用于定位短小的站点。 在两条短路迹线之间注入低电平的交流电流。 沿着迹线的点被高阻抗探头接触。 信号被过滤并与压入电位进行比较。 比较结果进一步滤波，放大，同步解调，结果显示。 短路定位器由中央处理单元控制。 剪辑允许连接到被测系统。 剪辑电位被监视。 包括滤波和缓冲电路的高阻抗探针电路提供与探针电路电位相比较的输出信号。 励磁电路通过夹子提供和交流测试信号。 探头和钳位电路电位通过一个窄带通放大器。 所得到的信号由具有同步反极性的集中器解调。 输出通过模数转换器传递到中央处理器进行处理和显示。

公开(公告)号：US07901358B2

公开(公告)日：2011-03-08

申请号：US11592741

申请日：2006-11-02

Applicant: James Mehi ,  Ronald E. Daigle ,  Laurence C. Brasfield ,  Brian Starkoski ,  Jerrold Wen ,  Kai Wen Liu ,  Lauren S. Pflugrath ,  F. Stuart Foster ,  Desmond Hirson

Inventor： James Mehi ,  Ronald E. Daigle ,  Laurence C. Brasfield ,  Brian Starkoski ,  Jerrold Wen ,  Kai Wen Liu ,  Lauren S. Pflugrath ,  F. Stuart Foster ,  Desmond Hirson

IPC: A61B8/00

CPC classification number: G01S7/52095 ,  A61B8/56 ,  A61B8/565 ,  G01S7/52017 ,  G01S7/5202 ,  G01S7/52034 ,  G01S7/52088 ,  G01S7/524 ,  G01S7/526 ,  G01S15/8915 ,  G01S15/8927 ,  G01S15/8956 ,  G01S15/8959 ,  G01S15/8997 ,  G10K11/341 ,  G10K11/346

Abstract: A system for acquiring an ultrasound signal comprises a signal processing unit adapted for acquiring a received ultrasound signal from an ultrasound transducer having a plurality of elements. The system is adapted to receive ultrasound signals having a frequency of at least 20 megahertz (MHz) with a transducer having a field of view of at least 5.0 millimeters (mm) at a frame rate of at least 20 frames per second (fps). The signal processing can further produce an ultrasound image from the acquired ultrasound signal. The transducer can be a linear array transducer, a phased array transducer, a two-dimensional (2-D) array transducer, or a curved array transducer.

Abstract translation: 一种用于获取超声信号的系统包括适于从具有多个元件的超声波换能器获取接收到的超声信号的信号处理单元。 该系统适于以至少为20帧/秒（fps）的帧速率的具有至少5.0毫米（mm）视野的换能器接收频率至少为20兆赫兹（MHz）的超声信号。 信号处理可以从所获取的超声信号进一步产生超声图像。 换能器可以是线性阵列换能器，相控阵转换器，二维（2-D）阵列换能器或弯曲阵列换能器。