公开(公告)号：US09170234B2

公开(公告)日：2015-10-27

申请号：US12447907

申请日：2007-08-07

申请人： Jin-Yi Lee ,  Jong-Woo Jun ,  Ji-Seong Hwang

发明人： Jin-Yi Lee ,  Jong-Woo Jun ,  Ji-Seong Hwang

IPC分类号： G01N27/82 ,  G01N27/90

CPC分类号： G01N27/9006

摘要： If surface defects, near surface defects, or internal defects of a ferromagnetic substance object, a paramagnetic substance object, or a mixture object of ferromagnetic and paramagnetic substances are not quantitatively analyzed, the detected results can be differently analyzed depending on the knowledge or skill of an inspector. A defect detection apparatus according to an exemplary embodiment of the present invention includes an induced current applier, a magneto-electric converter, a signal processor, a signal converter, and a data processor. The induced current applier applies a line or surface current to an object that is to be measured by using an alternating current (AC) having a frequency varying depending on a depth to be measured. The magneto-electric converter senses a magnetic field generated from the object by the Hn e or surface current and generates a magnetic field sensing signal corresponding to a strength of the sensed magnetic field. The signal processor filters and amplifies the magnetic field sensing signal and outputs a signal corresponding to amplitude of the filtered and amplified signal. The signal converter converts the signal output from the signal processor into a digital signal. The data processor quantitatively converts an intensity of a magnetic field generated from the object into a numerical value based on the digital signal output from the signal converter.

摘要翻译： 如果没有定量分析铁磁性物质对象的表面缺陷，近表面缺陷或内部缺陷，顺磁性物质物体或铁磁性和顺磁性物质的混合物体，则可以根据知识或技能进行不同的分析， 督察。 根据本发明的示例性实施例的缺陷检测装置包括感应电流施加器，磁电转换器，信号处理器，信号转换器和数据处理器。 感应电流施加器通过使用具有根据要测量的深度而变化的频率的交流电（AC）将线或表面电流施加到待测量的对象。 磁电转换器通过Hn e或表面电流感测从物体产生的磁场，并产生对应于感测磁场的强度的磁场感测信号。 信号处理器对磁场感测信号进行滤波和放大，并输出对应于滤波和放大信号幅度的信号。 信号转换器将从信号处理器输出的信号转换为数字信号。 数据处理器基于从信号转换器输出的数字信号，将从物体产生的磁场的强度定量地转换为数值。

公开(公告)号：US20100042336A1

公开(公告)日：2010-02-18

申请号：US12447907

申请日：2007-08-07

申请人： Jin-Yi Lee ,  Jong-Woo Jun ,  Ji-Seong Hwang

发明人： Jin-Yi Lee ,  Jong-Woo Jun ,  Ji-Seong Hwang

IPC分类号： G01N27/82 ,  G06F19/00

CPC分类号： G01N27/9006

摘要： If surface defects, near surface defects, or internal defects of a ferromagnetic substance object, a paramagnetic substance object, or a mixture object of ferromagnetic and paramagnetic substances are not quantitatively analyzed, the detected results can be differently analyzed depending on the knowledge or skill of an inspector. A defect detection apparatus according to an exemplary embodiment of the present invention includes an induced current applier, a magneto-electric converter, a signal processor, a signal converter, and a data processor. The induced current applier applies a line or surface current to an object that is to be measured by using an alternating current (AC) having a frequency varying depending on a depth to be measured. The magneto-electric converter senses a magnetic field generated from the object by the Hn e or surface current and generates a magnetic field sensing signal corresponding to a strength of the sensed magnetic field. The signal processor filters and amplifies the magnetic field sensing signal and outputs a signal corresponding to amplitude of the filtered and amplified signal. The signal converter converts the signal output from the signal processor into a digital signal. The data processor quantitatively converts an intensity of a magnetic field generated from the object into a numerical value based on the digital signal output from the signal converter.

摘要翻译： 如果没有定量分析铁磁性物质对象的表面缺陷，近表面缺陷或内部缺陷，顺磁性物质物体或铁磁性和顺磁性物质的混合物体，则可以根据知识或技能进行不同的分析， 督察。 根据本发明的示例性实施例的缺陷检测装置包括感应电流施加器，磁电转换器，信号处理器，信号转换器和数据处理器。 感应电流施加器通过使用具有根据要测量的深度而变化的频率的交流电（AC）将线或表面电流施加到待测量的对象。 磁电转换器通过Hn e或表面电流感测从物体产生的磁场，并产生对应于感测磁场的强度的磁场感测信号。 信号处理器对磁场感测信号进行滤波和放大，并输出对应于滤波和放大信号幅度的信号。 信号转换器将从信号处理器输出的信号转换为数字信号。 数据处理器基于从信号转换器输出的数字信号，将从物体产生的磁场的强度定量地转换为数值。