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1. 发明专利

CA2807917A1 EDDY CURRENT INSPECTION DEVICE, EDDY CURRENT INSPECTION PROBE, AND EDDY CURRENT INSPECTION METHOD 未知
公开(公告)号：CA2807917A1
公开(公告)日：2013-09-19
申请号：CA2807917
申请日：2013-03-04
申请人： HITACHI LTD
发明人： ENDO HISASHI , NISHIMIZU AKIRA , SADAOKA NORIYUKI
IPC分类号： G01N27/90
摘要： Provided is an eddy current inspection device, an eddy current inspection probe and an eddy current inspection method that make it possible to detect defects existing in deeper parts of test objects. Three or more odd number of excitation coils are arranged at even intervals in a circumferential direction on a postulated circumference. Excitation currents applied to the excitation coils are controlled so that the phase difference between excitation currents applied to adjacent ones of the excitation coils arranged in the circumferential direction on the postulated circumference equals one cycle divided by the number of excitation coils. A magnetic field generated according to an eddy current occurring in the test object due to a magnetic field caused by the application of the excitation currents to the excitation coils is detected by use of a detector arranged on a postulated plane containing the postulated circumference but inside the postulated circumference.

2. 发明专利

CA2807917C EDDY CURRENT INSPECTION DEVICE, EDDY CURRENT INSPECTION PROBE, AND EDDY CURRENT INSPECTION METHOD 未知
公开(公告)号：CA2807917C
公开(公告)日：2016-10-11
申请号：CA2807917
申请日：2013-03-04
申请人： HITACHI LTD
发明人： ENDO HISASHI , NISHIMIZU AKIRA , SADAOKA NORIYUKI
IPC分类号： G01N27/90
摘要： Provided is an eddy current inspection device, an eddy current inspection probe and an eddy current inspection method that make it possible to detect defects existing in deeper parts of test objects. Three or more odd number of excitation coils are arranged at even intervals in a circumferential direction on a postulated circumference. Excitation currents applied to the excitation coils are controlled so that the phase difference between excitation currents applied to adjacent ones of the excitation coils arranged in the circumferential direction on the postulated circumference equals one cycle divided by the number of excitation coils. A magnetic field generated according to an eddy current occurring in the test object due to a magnetic field caused by the application of the excitation currents to the excitation coils is detected by use of a detector arranged on a postulated plane containing the postulated circumference but inside the postulated circumference.

3. 发明专利

JP2013195202A Eddy current inspection device, eddy current inspection probe, and eddy current inspection method 有权
标题翻译： EDDY电流检测装置，EDDY电流检测探头和EDDY电流检测方法
公开(公告)号：JP2013195202A
公开(公告)日：2013-09-30
申请号：JP2012061918
申请日：2012-03-19
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ENDO HISASHI , NISHIMIZU AKIRA , SADAOKA NORIYUKI
IPC分类号： G01N27/90
CPC分类号： G01N27/87 , G01N27/902 , G01R33/385
摘要： PROBLEM TO BE SOLVED: To provide an eddy current inspection device, an eddy current inspection probe, and an eddy current inspection method which are capable of detecting a defect in a deep portion of an inspection object.SOLUTION: Three or more and odd number of exciting coils 61a-61e are arranged on an imaginary circumferential line 64 in a circumferential direction at equal intervals. A phase of an excitation current applied to each of the exciting coils 61a-61e next to each other in the circumferential direction of the imaginary circumferential line 64 is set to be shifted from the phase of the next exciting coil by a cycle of a fraction of the number of the exciting coils. A detector 62 disposed on an imaginary face 63 including the imaginary circumferential line 64 and inside the imaginary circumferential line 64 detects a magnetic field based on an eddy current generated in an inspection object by a magnetic field generated due to the application of the excitation current to the exciting coils 61a-61e.
摘要翻译：要解决的问题：提供能够检测检查对象的深部的缺陷的涡流检查装置，涡流检查探针和涡流检查方法。解决方案：三个或更多个励磁线圈61a-61e以相同的间隔沿周向方向布置在假想圆周线64上。施加到假想圆周线64的周向上彼此相邻的励磁线圈61a-61e的励磁电流的相位被设定为从下一激励线圈的相位偏移一小部分的周期励磁线圈的数量。设置在包括假想圆周线64和假想圆周线64内部的假想面63上的检测器62基于通过施加激励电流而产生的磁场在检查对象中产生的涡流来检测磁场励磁线圈61a-61e。

4. 发明专利

JPS5758762B2 失效
公开(公告)号：JPS5758762B2
公开(公告)日：1982-12-11
申请号：JP3131476
申请日：1976-03-24
申请人： HITACHI LTD
发明人： KUROKI KAZUHIRO , ENDO HISASHI , PPONJO KAZUO , KOBAYASHI SEIJI
IPC分类号： H01F27/28

5. 发明专利

JP2013160579A Eddy current flaw detection probe 有权
标题翻译： EDDY电流检测探头
公开(公告)号：JP2013160579A
公开(公告)日：2013-08-19
申请号：JP2012021462
申请日：2012-02-03
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NISHIMIZU AKIRA , ISHIHARA ATSUSHI , MATSUMOTO JUN , KAWANAKA TAKAYUKI , ENDO HISASHI , NARUSHIGE MASASHI
IPC分类号： G01N27/90
摘要： PROBLEM TO BE SOLVED: To provide a probe excellent in detection of a minute defect by suppressing generation of lift-off signals and narrowing a generation area of an eddy current.SOLUTION: An exciter of the present invention includes a magnetic material plate arranged so as to hold a gap at one part arranged on an inspection surface of a body to be inspected, one detection coil arranged at the gap part, and a conductive plate arranged right above a detector. According to the present invention, by suppressing generation of lift-off signals and narrowing a generation area of an eddy current, a probe excellent in detection of a minute defect is provided.
摘要翻译：要解决的问题：通过抑制剥离信号的产生和涡流的产生区域的变窄来提供微小缺陷的检测优异的探针。本发明的激励器包括磁性材料板，其布置为在被检体的检查面上的一部分保持间隙，配置在间隙部的一个检测线圈和布置在检测器正上方的导电板。根据本发明，通过抑制剥离信号的产生和涡流的产生区域的变窄，提供了微小缺陷的检测优异的探针。

6. 发明专利

JP2012002633A Eddy current inspection device and inspection method 有权
标题翻译： EDDY电流检测装置及检测方法
公开(公告)号：JP2012002633A
公开(公告)日：2012-01-05
申请号：JP2010137169
申请日：2010-06-16
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ENDO HISASHI , NISHIMIZU AKIRA , NARUSHIGE MASASHI
IPC分类号： G01N27/90
摘要： PROBLEM TO BE SOLVED: To provide an eddy current inspection device and an inspection method which enable an inspection of thickness reduction even if a specimen has a thick wall and enable, at the same time, measurements of defects such as scars and cracks to improve work efficiency of the inspection.SOLUTION: In an inspection device 1, time changing magnetic field generation means 12 controls exciting current of an exciting coil based on exciting voltage having a time-periodical pulse like wave form and generates a time changing magnetic field. For changes of the magnetic field due to eddy current generated by the time changing magnetic field generation means 12 to the specimen, transient information extraction means 13 extracts transient magnetic field information, and periodic information extraction means 15 extracts periodic magnetic field information. A wall thickness evaluation part 19 performs arithmetic processing of the transient magnetic field information extracted by the transient information extraction means 13 and evaluates wall thickness of the specimen. A defect evaluation part 20 performs arithmetic processing of periodic magnetic field information extracted by the periodic information extraction means 15 and evaluates defects of the specimen such as scars and cracks.
摘要翻译：要解决的问题：为了提供涡流检查装置和检查方法，即使样本具有厚壁也能够检查厚度减小，并且能够同时测量诸如疤痕和裂纹的缺陷提高检验工作效率。解决方案：在检查装置1中，时变磁场产生装置12基于具有诸如波形的时间周期脉冲的激励电压来控制励磁线圈的励磁电流，并产生时变磁场。为了由由时变磁场产生装置12产生的涡流对试样的磁场变化，瞬时信息提取装置13提取瞬态磁场信息，并且周期信息提取装置15提取周期磁场信息。壁厚评价部19进行由瞬时信息提取单元13提取的瞬时磁场信息的运算处理，并对样本的壁厚进行评价。缺陷评估部20进行由周期信息提取单元15提取的周期磁场信息的运算处理，并评价样本的缺陷，如疤痕和裂缝。版权所有（C）2012，JPO＆INPIT

7. 发明专利

JP2013068440A Leakage flux flaw detection apparatus 有权
标题翻译：泄漏流量检测装置
公开(公告)号：JP2013068440A
公开(公告)日：2013-04-18
申请号：JP2011205494
申请日：2011-09-21
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MORI ISATO , NISHIMIZU AKIRA , FUJIMA MASAHIRO , ENDO HISASHI
IPC分类号： G01N27/83
摘要： PROBLEM TO BE SOLVED: To provide a leakage flux flaw detection apparatus in which, when performing flaw detection on a surface layer part of a thick steel material, a magnetization level in the surface layer part of the thick steel material is increased without enlarging a magnetizer in order to scan the magnetizer on the stopped thick steel material, and a magnetic sensor detects a leakage flux from a defect in the surface layer part at a high S/N.SOLUTION: A leakage flux flaw detection apparatus comprises a moving wagon installed for scanning a magnetizer, and magnetic flux convergence plates in the vicinity of magnetic poles of the magnetizer. Thus, when performing flaw detection on a surface layer part of a thick steel material, a magnetization level in the surface layer part of the thick steel material is increased without enlarging the magnetizer in order to scan the magnetizer on the stopped thick steel material, and a magnetic sensor detects a leakage flux from a defect in the surface layer part at a high S/N.
摘要翻译：要解决的问题：提供一种漏磁通探伤装置，其中，当对厚钢材的表层部进行探伤时，厚钢材的表层部分的磁化强度增加而没有扩大磁化器，以便在停止的厚钢材上扫描磁化器，并且磁传感器以高S / N检测表面层部分中的缺陷的漏磁通。解决方案：漏磁通探伤装置包括安装用于扫描磁化器的移动货车和磁化器磁极附近的磁通量会聚板。因此，当在厚钢材的表层部分进行探伤时，在不扩大磁化器的情况下，增加厚钢材的表层部分的磁化强度，以便在停止的厚钢材上扫描磁化器，磁传感器以高S / N检测表面层部分的缺陷的漏磁通。版权所有（C）2013，JPO＆INPIT

8. 发明专利

JP2011117890A Eddy current flaw detection probe 审中-公开
标题翻译： EDDY电流检测探头
公开(公告)号：JP2011117890A
公开(公告)日：2011-06-16
申请号：JP2009277385
申请日：2009-12-07
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NISHIMIZU AKIRA , NARUSHIGE MASASHI , ENDO HISASHI
IPC分类号： G01N27/90
摘要： PROBLEM TO BE SOLVED: To provide an eddy current flaw detection probe for a pulsed eddy current flaw detector inspecting magnetic materials, such as carbon steel, capable of detecting defects inherent in an inspection object at a high resolution, while maintaining defect detection sensitivity.
SOLUTION: The eddy current flaw detection probe reduces an eddy current generation range, by arranging the magnetic materials around an exciting coil which prevent a diffusion of a generating magnetic field, restrains a range of an eddy current to be generated in the inspection object by disposing conductive non-magnetic materials on the outer circumference of the magnetic materials and near the inspection object; maintains the generating magnetic field; and enables pulsed eddy current flaw detection, to enhance resolution by lessening the generation range of the eddy current.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种用于脉冲涡流探伤仪的涡流探伤探头，用于检测诸如碳钢的磁性材料，其能够以高分辨率检测检查对象中固有的缺陷，同时保持缺陷检测灵敏度。
解决方案：涡流探伤探头通过将磁性材料布置在防止发生磁场扩散的励磁线圈周围来减小涡流产生范围，从而抑制检测中产生的涡流的范围通过在磁性材料的外周和检查对象附近设置导电非磁性材料来实现; 保持发电磁场; 并且能够进行脉冲涡流探伤，通过减小涡电流的产生范围来提高分辨率。版权所有（C）2011，JPO＆INPIT

9. 发明专利

JP2011012985A Pulse excitation type eddy current flaw detection method and pulse excitation type eddy current flaw detector using the same 有权
标题翻译：脉冲激励型EDDY电流检测方法和脉冲激励型EDDY电流检波器
公开(公告)号：JP2011012985A
公开(公告)日：2011-01-20
申请号：JP2009154943
申请日：2009-06-30
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NARUSHIGE MASASHI , NISHIMIZU AKIRA , ENDO HISASHI
IPC分类号： G01N27/90
摘要： PROBLEM TO BE SOLVED: To easily measure only the magnetic flux due to the eddy current of a specimen by separating the magnetic flux due to the eddy current of the specimen and the magnetic flux due to an excitation current because the magnetic flux due to the excitation current is superposed on the magnetic flux due to the eddy current of the specimen in the specimen being a thin-walled material, and because the magnetic flux due to the excitation current at the time of falling becomes larger than the magnetic flux due to the eddy current by about two digits.SOLUTION: In the pulse excitation type eddy current flaw detection method, a probe having an excitation coil and a detection element is provided, pulse-like excitation voltage is applied to the excitation coil to penetrate the magnetic flux due to the excitation current flowing through the excitation coil into the specimen, the eddy current is produced in the specimen by the cutting-off of the excitation current, eddy current magnetic flux is detected by the detection element of the probe, and the wall thickness of the specimen is measured from the timewise attenuation characteristics of the eddy current magnetic flux. Positive and negative excitation voltages are combined with the pulse-like excitation voltage applied to the excitation coil of the probe to forcibly attenuate the excitation current of the excitation coil in a short period of time.
摘要翻译：要解决的问题：为了容易地仅通过由于试样的涡流分离由于试样的涡流而产生的磁通量和由于激发电流引起的磁通量而容易地测量由于试样的涡流引起的磁通量，因为由于激发导致的磁通量由于作为薄壁材料的试样中的试样的涡流，电流叠加在磁通上，并且由于在下降时由于激励电流引起的磁通量大于由于涡流引起的磁通量电流大约两位数。解决方案：在脉冲激励型涡流探伤方法中，提供一个具有激励线圈和检测元件的探头，脉冲激励电压施加到励磁线圈上以穿透磁通量，由于激励电流通过励磁线圈流入试样，通过激励电流的截止在试样中产生涡流，涡流电流通过探针的检测元件检测等离子体通量，并根据涡流磁通的时间衰减特性测量样品的壁厚。正和负激励电压与施加到探针的激励线圈的脉冲激励电压组合，以在短时间段内强制地衰减励磁线圈的励磁电流。

10. 发明专利

JP2010085298A Pulse excitation type eddy current flaw detection method and device 有权
标题翻译：脉冲激励型EDDY电流检测方法和装置
公开(公告)号：JP2010085298A
公开(公告)日：2010-04-15
申请号：JP2008255968
申请日：2008-10-01
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NARUSHIGE MASASHI , NISHIMIZU AKIRA , ENDO HISASHI , KOIKE MASAHIRO
IPC分类号： G01N27/72 , G01N27/90
摘要： PROBLEM TO BE SOLVED: To provide a pulse excitation type eddy current flaw detection method and device capable of evaluating the inclination of attenuation on the basis of magnetic flux by an eddy current. SOLUTION: The flaw detection device includes: a probe 24 consisting of an exciting coil and a detection element; an exciting means for making a pulsed exciting current flow through the exciting coil; and a computation means for making magnetic fluxes by the exciting current penetrate a body to be tested and computing temporal attenuation characteristics of magnetic flux by an eddy current which has occurred in the body to be tested due to the cutoff of the exciting current and detected by the detection element 34. The exciting coil is constituted of a plurality of exciting coils 32 an 33. In the plurality of exciting coils 32 and 33, a magnetic flux is made to penetrate the body to be tested as mutually interfering with each other in such a way as to reduce the amount of magnetic fluxes interlinking with each exciting coil and attenuate magnetic fluxes by the exciting current at the detection element in a short time when the exciting current is cut off. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种脉冲激励型涡流探伤方法和装置，其能够通过涡流根据磁通量来评估衰减的倾斜度。解决方案：探伤装置包括：由励磁线圈和检测元件组成的探针24; 用于使脉冲激励电流流过励磁线圈的激励手段; 以及用于通过激励电流使磁通量穿过被测体的计算装置，并且通过由于激励电流的截止而在待测试的体内发生的涡流来计算磁通量的时间衰减特性，并由励磁线圈由多个励磁线圈32和33构成。在多个励磁线圈32和33中，使磁通量穿过被测试体相互相互干扰一种减少与每个励磁线圈相互连接的磁通量的方法，并且在激励电流被切断时在短时间内通过检测元件处的励磁电流来衰减磁通量。版权所有（C）2010，JPO＆INPIT

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