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    • 83. 发明授权
    • Dynamic collimator for wide coverage and low dose cardiac CT imaging
    • 动态准直器用于广泛覆盖和低剂量心脏CT成像
    • US09131911B2
    • 2015-09-15
    • US13419483
    • 2012-03-14
    • Jiahua FanRoy-Arnulf Helge Nilsen
    • Jiahua FanRoy-Arnulf Helge Nilsen
    • A61B6/03A61B6/06A61B6/00
    • A61B6/4085A61B6/032A61B6/06A61B6/503A61B6/542
    • A CT scanner comprising a dynamic collimator disposed near an x-ray source and a controller configured to rotate the x-ray source about a subject, wherein imaging data is acquired from a single rotation of the x-ray source, the single rotation being divided into a first half-scan and a second half-scan. The controller is further configured to position the dynamic collimator after acquiring image data from one of the first half-scan and the second half-scan and simultaneous to commencement of acquiring image data from the other of the first half-scan and the second half-scan to obstruct a central portion of an x-ray beam emitted by the x-ray source during one of the first half-scan and the second half-scan. The CT scanner is further configured to reconstruct a CT image using the first set of imaging data and the second set of imaging data.
    • 一种CT扫描器,包括设置在x射线源附近的动态准直器,以及控制器,被配置为围绕被摄体旋转x射线源,其中,从x射线源的单次旋转获取成像数据,单个旋转被分割 进入第一半扫描和第二半扫描。 控制器还被配置为在从第一半扫描和第二半扫描之一获取图像数据之后定位动态准直仪,并且同时开始从第一半扫描和第二半扫描中的另一个采集图像数据, 扫描以在第一半扫描和第二半扫描期间的一个扫描期间阻挡由x射线源发射的x射线束的中心部分。 CT扫描器还被配置为使用第一组成像数据和第二组成像数据来重建CT图像。
    • 89. 发明授权
    • System and method for high resistance ground fault detection and protection in power distribution systems
    • 配电系统中高电阻接地故障检测和保护的系统和方法
    • US09046560B2
    • 2015-06-02
    • US13487322
    • 2012-06-04
    • Huaqiang Li
    • Huaqiang Li
    • H02M5/458G01R31/02H02H3/52H02H7/122G06F19/00G01R31/08H02H3/16
    • G01R31/025H02H3/165H02H3/52H02H7/1227
    • A system and method for detecting high resistance ground faults in a power distribution system is disclosed. A fault detection and protection system is provided that includes a plurality of current sensors to measure current on the three phase output of the converter-inverter arrangement of the power distribution system and a controller configured to measure the three phase current on the three phase output, extract a fundamental current component for each phase of the three phase output, extract a third harmonic component for each phase of the three phase output, compare the fundamental current component and the third harmonic component extracted from each phase to a first threshold and a second threshold, respectively, and detect a ground fault on a phase of the three phase output based on the comparisons of the fundamental current component and the third harmonic component to the first and second thresholds.
    • 公开了一种用于检测配电系统中的高电阻接地故障的系统和方法。 提供了一种故障检测和保护系统,其包括多个电流传感器,以测量配电系统的转换器 - 逆变器装置的三相输出端上的电流;以及控制器,被配置为测量三相输出上的三相电流, 提取三相输出的每相的基波电流分量,提取三相输出的每相的三次谐波分量,将从每相提取的基波电流分量和三次谐波分量进行比较,将其从第一阈值和第二阈值 并且基于基本电流分量和第三谐波分量与第一和第二阈值的比较来检测三相输出的相位上的接地故障。