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1. 发明申请

US20090206831A1 Method and device for non destructive evaluation of defects in a metallic object 有权
标题翻译：用于非破坏性评估金属物体缺陷的方法和装置
公开(公告)号：US20090206831A1
公开(公告)日：2009-08-20
申请号：US12280414
申请日：2002-02-24
申请人： Claude Fermon , Myriam Pannetier , Nicolas Biziere , Francois Vacher , Thierry Sollier
发明人： Claude Fermon , Myriam Pannetier , Nicolas Biziere , Francois Vacher , Thierry Sollier
IPC分类号： G01N27/90
CPC分类号： G01N27/9046
摘要： A device for non destructive evaluation of defects in a metallic object (2) by eddy currents, comprises a field emitter (3) for emitting an alternating electromagnetic field at a first frequency fi in the neighbourhood of the metallic object (2), and a magnetoresistive sensor (1) for detecting a response signal constituted by a return electromagnetic field which is re-emitted by eddy currents induced by the alternating electromagnetic field in the metallic object (2). The device further comprises: a driving circuit (230) for driving the magnetoresistive sensor (1) by a current at a second frequency fc which is different from the first frequency fi, so that the magnetoresistive sensor (1) acts as an in situ modulator; a detector for detecting a response signal between the terminals of the magnetoresistive sensor (1); a filter for filtering the response signal detected by the magnetoresistive sensor (1) to keep either the frequency sum (fi+fc) of the first and second frequencies or the frequency difference (fi+fc) of the first and second frequencies, and a processor for processing the filtered response signal and extract eddy current information on defects in the metallic object (2).
摘要翻译：用于通过涡流对金属物体（2）中的缺陷进行非破坏性评估的装置包括用于在金属物体（2）附近以第一频率f 1发射交变电磁场的场发射器（3），以及磁阻传感器（1），用于检测由金属物体（2）中的交变电磁场引起的涡流重新发射的返回电磁场构成的响应信号。该装置还包括：用于以与第一频率fi不同的第二频率fc的电流驱动磁阻传感器（1）的驱动电路（230），使得磁阻传感器（1）充当原位调制器 ; 用于检测所述磁阻传感器（1）的端子之间的响应信号的检测器; 用于对由磁阻传感器（1）检测到的响应信号进行滤波以保持第一和第二频率的频率和（fi + fc）或第一和第二频率的频率差（fi + fc）的滤波器，以及处理器，用于处理滤波的响应信号，并提取关于金属物体（2）中的缺陷的涡流信息。

2. 发明授权

US08063631B2 Method and device for non destructive evaluation of defects in a metallic object 有权
标题翻译：用于非破坏性评估金属物体缺陷的方法和装置
公开(公告)号：US08063631B2
公开(公告)日：2011-11-22
申请号：US12280414
申请日：2006-02-24
申请人： Claude Fermon , Myriam Pannetier , Nicolas Biziere , Francois Vacher , Thierry Sollier
发明人： Claude Fermon , Myriam Pannetier , Nicolas Biziere , Francois Vacher , Thierry Sollier
IPC分类号： G01N27/82 , G01R33/09
CPC分类号： G01N27/9046
摘要： A device for non destructive evaluation of defects in a metallic object (2) by eddy currents, comprises a field emitter (3) for emitting an alternating electromagnetic field at a first frequency fi in the neighborhood of the metallic object (2), and a magnetoresistive sensor (1) for detecting a response signal constituted by a return electromagnetic field which is re-emitted by eddy currents induced by the alternating electromagnetic field in the metallic object (2). The device further comprises: a driving circuit (230) for driving the magnetoresistive sensor (1) by a current at a second frequency fc which is different from the first frequency fi, so that the magnetoresistive sensor (1) acts as an in situ modulator; a detector for detecting a response signal between the terminals of the magnetoresistive sensor (1); a filter for filtering the response signal detected by the magnetoresistive sensor (1) to keep either the frequency sum (fi+fc) of the first and second frequencies or the frequency difference (fi−fc) of the first and second frequencies, and a processor for processing the filtered response signal and extract eddy current information on defects in the metallic object (2).
摘要翻译：用于通过涡流对金属物体（2）中的缺陷进行非破坏性评估的装置包括用于在金属物体（2）附近以第一频率f 1发射交变电磁场的场发射器（3），以及磁阻传感器（1），用于检测由金属物体（2）中的交变电磁场引起的涡流重新发射的返回电磁场构成的响应信号。该装置还包括：用于以与第一频率fi不同的第二频率fc的电流驱动磁阻传感器（1）的驱动电路（230），使得磁阻传感器（1）充当原位调制器 ; 用于检测所述磁阻传感器（1）的端子之间的响应信号的检测器; 滤波器，用于对由磁阻传感器（1）检测到的响应信号进行滤波，以保持第一和第二频率的频率和（fi + fc）或第一和第二频率的频率差（fi-fc），以及处理器，用于处理滤波的响应信号，并提取关于金属物体（2）中的缺陷的涡流信息。

3. 发明申请

US20100139081A1 METHOD FOR ASSEMBLING A HIGH-DYNAMIC AND HIGH-SPATIAL RESOLUTION EDDY CURRENT TESTING HEAD 有权
标题翻译：用于组装高动态和高空间分辨率EDDY电流测试头的方法
公开(公告)号：US20100139081A1
公开(公告)日：2010-06-10
申请号：US11815293
申请日：2006-01-27
申请人： Jean-Marc Decitre , Thierry Sollier
发明人： Jean-Marc Decitre , Thierry Sollier
IPC分类号： G01R3/00
CPC分类号： G01N27/9046 , Y10T29/49007
摘要： The invention concerns a method for producing an assembly of at least one transmission coil (B1) and one reception coil (B2) for eddy current testing, the reception coil receiving in the absence of fault a complex amplitude signal VR, subject to a variation δVR in the presence of a characteristic fault to be detected. The method consists in selecting the distance ΔER between the axes of the transmission coil and the reception coil so as to maximize the ratio IδVR/VRI.
摘要翻译：本发明涉及一种用于制造用于涡流测试的至少一个传输线圈（B1）和一个接收线圈（B2）的组件的方法，所述接收线圈在不存在故障的情况下接收复变幅度信号VR，经受变化δVR 在存在要检测的特征故障的情况下。该方法在于选择传输线圈和接收线圈的轴之间的距离＆Dgr; ER，以使IδVR/ VRI的比例最大化。

4. 发明授权

US08274282B2 Method for assembling a high-dynamic and high-spatial resolution eddy current testing head 有权
标题翻译：用于组装高动态和高空间分辨率涡流测试头的方法
公开(公告)号：US08274282B2
公开(公告)日：2012-09-25
申请号：US11815293
申请日：2006-01-27
申请人： Jean-Marc Decitre , Thierry Sollier
发明人： Jean-Marc Decitre , Thierry Sollier
IPC分类号： G01R33/00
CPC分类号： G01N27/9046 , Y10T29/49007
摘要： The invention concerns a method for producing an assembly of at least one transmission coil (B1) and one reception coil (B2) for eddy current testing, the reception coil receiving in the absence of fault a complex amplitude signal VR, subject to a variation δVR in the presence of a characteristic fault to be detected. The method consists in selecting the distance ΔER between the axes of the transmission coil and the reception coil so as to maximize the ratio IδVR/VRI.
摘要翻译：本发明涉及一种用于制造用于涡流测试的至少一个传输线圈（B1）和一个接收线圈（B2）的组件的方法，所述接收线圈在不存在故障的情况下接收复变幅度信号VR，经受变化δVR 在存在要检测的特征故障的情况下。该方法在于选择传输线圈和接收线圈的轴之间的距离＆Dgr; ER，以使IδVR/ VRI的比例最大化。

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