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    • 5. 发明授权
    • Method and apparatus for evaluating length of defect in eddy current testing
    • 用于评估涡流测试中缺陷长度的方法和装置
    • US07911206B2
    • 2011-03-22
    • US11771436
    • 2007-06-29
    • Akira NishimizuYoshio NonakaIsao YoshidaMotoyuki NakamuraAkihiro TakiMasahiro Koike
    • Akira NishimizuYoshio NonakaIsao YoshidaMotoyuki NakamuraAkihiro TakiMasahiro Koike
    • G01N27/82G01N27/72
    • G01N27/9046
    • The surface length of a metal subject to be inspected is evaluated by detecting an eddy current without using a combination of a scale and visual or liquid penetrant inspection. An exciting coil and a detecting coil are scanned above the subject in a length direction. An eddy current detector measures an output voltage corresponding to scanning positions based on an output from the detecting coil. Based on an output voltage distribution curve indicating a distribution of output voltages corresponding to the scanning positions, position information is extracted corresponding to values which are within a differential voltage range and lower by 12 dB than a maximum value of the output voltages on the left and right sides of the distribution. A distance between the positions included in the extracted information is calculated to evaluate the length of a slit which is a defect present on the subject surface.
    • 要检查的金属的表面长度通过检测涡流来评估,而不使用水垢和视觉或液体渗透剂检查的组合。 激光线圈和检测线圈在长度方向上扫描被检体的上方。 涡电流检测器基于来自检测线圈的输出来测量对应于扫描位置的输出电压。 基于表示与扫描位置对应的输出电压分布的输出电压分布曲线,对应于在差分电压范围内并且比左侧的输出电压的最大值低12dB的值提取位置信息, 右侧分配。 计算提取的信息中包含的位置之间的距离,以评估作为被摄体表面上存在的缺陷的狭缝的长度。
    • 9. 发明授权
    • Eddy current testing device
    • 涡流检测装置
    • US08183862B2
    • 2012-05-22
    • US12389499
    • 2009-02-20
    • Hisashi EndoAkira NishimizuHirofumi OuchiYoshio Nonaka
    • Hisashi EndoAkira NishimizuHirofumi OuchiYoshio Nonaka
    • G01N27/82
    • G01N27/9046
    • An eddy current testing device which confirms that a change in characteristics of a target object is detected regardless of the magnitude of the change and specifying the position of a portion from which the change is detected. The device uses an eddy current probe to inspect a bent portion of a metal body, and has an inspection controller and a display unit. The inspection controller calculates a phase angle of a signal detected by the eddy current probe and generates flaw identification image data that indicates an area (or an area of the signal detected and determined to correspond to a flaw signal, based on the phase angle of the detected signal) of a flaw signal in coordinates in which the position of the portion of the target object is plotted along a coordinate axis. The display unit displays the flaw identification image data.
    • 一种涡流测试装置,其确认目标对象的特性的变化,而不管变化的大小如何,并且指定检测到变化的部分的位置。 该装置使用涡流探针来检查金属体的弯曲部分,并具有检查控制器和显示单元。 检查控制器计算由涡电流探测器检测的信号的相位角,并产生缺陷识别图像数据,该缺陷识别图像数据指示检测并确定为与缺陷信号相对应的信号的面积,基于相位角 检测信号),其中沿着坐标轴绘制目标对象的部分的位置的坐标中的缺陷信号。 显示单元显示缺陷识别图像数据。
    • 10. 发明申请
    • Device for Detecting Defect of Turbine Rotor Blade and Method for Detecting Defect of Turbine Rotor Blade
    • 用于检测涡轮转子叶片缺陷的装置和检测涡轮转子叶片缺陷的方法
    • US20110218741A1
    • 2011-09-08
    • US13124092
    • 2008-10-14
    • Atsuya HiranoAkira NishimizuTakeshi Kudo
    • Atsuya HiranoAkira NishimizuTakeshi Kudo
    • G01N27/90G06F19/00
    • G01N27/9006G01N27/902
    • A defect detection device for a turbine rotor blade, wherein a turbine rotor blade implanting portion is constructed by fitting a set of rotor grooves formed on a rotor disc portion with a set of blade grooves formed on each root portion of turbine rotor blades arranged around the outer circumference of a turbine rotor rotatably installed in a turbine casing; a recess is provided in the side surface of a web provided to the inner circumferential side of a stationary blade diaphragm where stationary blades are annularly arranged adjacent to the turbine rotor blades; an eddy current probe for inspecting the state of the turbine rotor blade implanting portion is movably installed in the recess; a rod provided with a signal line for transmitting a signal detected by the eddy current probe, connected to the eddy current prove, is set up to be movable through a hole in a turbine casing and an air gap formed in the stationary blade diaphragm; the eddy current probe connected to the rod is moved toward or away from the turbine rotor blade implanting portion; and a data analyzer is provided for determining the condition of a defect occurred in the turbine rotor blade implanting portion based on the signals detected by the eddy current probe.
    • 一种用于涡轮转子叶片的缺陷检测装置,其中,涡轮转子叶片植入部分通过将形成在转子盘部分上的一组转子槽与形成在涡轮转子叶片的每个根部上的一组叶片槽相配合而构成 可旋转地安装在涡轮机壳体中的涡轮转子的外圆周; 在设置在固定叶片的内周侧的腹板的侧表面上设置有凹部,其中固定叶片与涡轮转子叶片相邻地环形地布置; 用于检查涡轮转子叶片植入部的状态的涡流探针可移动地安装在凹部中; 设置有用于传输由涡电流探头检测的信号的信号线的连接到涡流证明的信号线被设置为可以通过涡轮机壳体中的孔和形成在固定叶片隔膜中的气隙移动; 连接到杆的涡流探针朝向或远离涡轮转子叶片植入部分移动; 并且提供数据分析器,用于基于由涡流探针检测到的信号来确定在涡轮转子叶片注入部分中发生的缺陷的状况。