公开(公告)号：US5461312A

公开(公告)日：1995-10-24

申请号：US222863

申请日：1994-04-05

申请人： Yasuharu Hosohara ,  Kiwamu Suzuki ,  Shigeru Fujiwara ,  Toshihide Kawabe

发明人： Yasuharu Hosohara ,  Kiwamu Suzuki ,  Shigeru Fujiwara ,  Toshihide Kawabe

IPC分类号： G01N27/90

CPC分类号： G01N27/902 ,  G01N27/9046

摘要： The present invention relates to a flaw detector for metal material for maintaining and managing pipelines using a remote field eddy current sensor. An AC signal having constant level and shifted by predetermined phase angle is added to signals received in receiving coils of the remote field eddy current sensor to obtain accurate phase detection in a normal, nonflawed portion of the pipeline to be tested (e.g. uniform thickness, no holes, etc.). By preventing generation of abnormal flaw data, precise diagnosis of the pipeline can be performed. An AGC circuit may be used to maintain at a constant level of received signal. Two sets of spaced apart receiving coils are spaced from an exciting coil a distance greater than a predetermined distance (about two times the pipeline diameter). The set of receiving coils closest to the exciting coil has a greater number of coil turns than the other set. This coil configuration generates sensed coil differential signals having sufficient signal amplitude to permit stabilized and accurate phase detection and comparison for nonflawed and gradually flawed regions in the pipe.

摘要翻译： 本发明涉及一种用于使用远场涡流传感器维护和管理管线的金属材料探伤仪。 将具有恒定电平并且移位了预定相位角的AC信号添加到在远场涡流传感器的接收线圈中接收的信号，以在要测试的管线的正常非缺陷部分中获得准确的相位检测（例如，均匀厚度，否 孔等）。 通过防止产生异常缺陷数据，可以进行流水线的精确诊断。 可以使用AGC电路来维持在接收信号的恒定电平。 两组间隔开的接收线圈与激励线圈间隔大于预定距离（约为管道直径的两倍）。 最靠近励磁线圈的接收线圈组比其他组具有更多的线圈匝数。 该线圈配置产生具有足够信号幅度的感测线圈差分信号，以允许对管道中非缺陷和逐渐有缺陷的区域进行稳定和精确的相位检测和比较。

公开(公告)号：US5210492A

公开(公告)日：1993-05-11

申请号：US740388

申请日：1991-08-05

申请人： Yasuharu Hosohara ,  Kiwamu Suzuki ,  Shigeru Fujiwara ,  Toshihide Kawabe

发明人： Yasuharu Hosohara ,  Kiwamu Suzuki ,  Shigeru Fujiwara ,  Toshihide Kawabe

IPC分类号： G01N27/90

CPC分类号： G01N27/902 ,  G01N27/9046

摘要： The present invention relates to a flaw detector for metal material for maintaining and managing pipelines using a remote field eddy current sensor. An AC signal having a constant level and shifted by predetermined phase angle is added to signals received in receiving coils of the remote field eddy current sensor to obtain accurate phase detection in a normal, nonflawed portion of the pipeline to be tested (e.g. uniform thickness, no holes, etc.). By preventing generation of abnormal flaw data, precise diagnosis of the pipeline can be performed. An AGC circuit may be used to maintain at a constant level of received signal. Two sets of spaced apart receiving coils are spaced from an exciting coil a distance greater than a predetermined distance (about two times the pipeline diameter). The set of receiving coils closest to the exciting coil has a greater number of coil turns than the other set. This coil configuration generates sensed coil differential signals having sufficient signal amplitude to permit stabilized and accurate phase detection and comparison for nonflawed and gradually flawed regions in the pipe.

摘要翻译： 本发明涉及一种用于使用远场涡流传感器维护和管理管线的金属材料探伤仪。 将具有恒定电平并且移位了预定相位角的AC信号添加到在远场涡流传感器的接收线圈中接收到的信号，以在要测试的管线的正常非缺陷部分（例如均匀的厚度， 无孔等）。 通过防止产生异常缺陷数据，可以进行流水线的精确诊断。 可以使用AGC电路来维持在接收信号的恒定电平。 两组间隔开的接收线圈与激励线圈间隔大于预定距离（约为管道直径的两倍）。 最靠近励磁线圈的接收线圈组比其他组具有更多的线圈匝数。 该线圈配置产生具有足够信号幅度的感测线圈差分信号，以允许对管道中非缺陷和逐渐有缺陷的区域进行稳定和精确的相位检测和比较。

公开(公告)号：US5365169A

公开(公告)日：1994-11-15

申请号：US014875

申请日：1993-01-28

申请人： Yasuharu Hosohara ,  Kiwamu Suzuki ,  Shigeru Fujiwara ,  Toshihide Kawabe

发明人： Yasuharu Hosohara ,  Kiwamu Suzuki ,  Shigeru Fujiwara ,  Toshihide Kawabe

IPC分类号： G01N27/90

CPC分类号： G01N27/902 ,  G01N27/9046

摘要： The present invention relates to a flaw detector for metal material for maintaining and managing pipelines using a remote field eddy current sensor. An AC signal having a constant level and shifted by predetermined phase angle is added to signals received in receiving coils of the remote field eddy current sensor to obtain accurate phase detection in a normal, nonflawed portion of the pipeline to be tested (e.g. uniform thickness, no holes, etc.). By preventing generation of abnormal flaw data, precise diagnosis of the pipeline can be performed. An AGC circuit may be used to maintain at a constant level of received signal. Two sets of spaced apart receiving coils are spaced from an exciting coil a distance greater than a predetermined distance (about two time the pipeline diameter). The set of receiving coils closest to the exciting coil has a greater number of coil turns than the other set. This coil configuration generates sensed coil differential signals having sufficient signal amplitude to permit stabilized and accurate phase detection and comparison for nonflawed and gradually flawed regions in the pipe.

摘要翻译： 本发明涉及一种用于使用远场涡流传感器维护和管理管线的金属材料探伤仪。 将具有恒定电平并且移位了预定相位角的AC信号添加到在远场涡流传感器的接收线圈中接收到的信号，以在要测试的管线的正常非缺陷部分（例如均匀的厚度， 无孔等）。 通过防止产生异常缺陷数据，可以进行流水线的精确诊断。 可以使用AGC电路来维持在接收信号的恒定电平。 两组间隔开的接收线圈与激励线圈间隔大于预定距离（大约管线直径的两倍）。 最靠近励磁线圈的接收线圈组比其他组具有更多的线圈匝数。 该线圈配置产生具有足够信号幅度的感测线圈差分信号，以允许对管道中非缺陷和逐渐有缺陷的区域进行稳定和精确的相位检测和比较。

公开(公告)号：US5623203A

公开(公告)日：1997-04-22

申请号：US506759

申请日：1995-07-26

申请人： Yasuharu Hosohara ,  Yoshikazu Chiba ,  Akira Kinoshita ,  Masanori Akita ,  Takashi Sumi ,  Toshihide Kawabe

发明人： Yasuharu Hosohara ,  Yoshikazu Chiba ,  Akira Kinoshita ,  Masanori Akita ,  Takashi Sumi ,  Toshihide Kawabe

IPC分类号： G01N27/90 ,  G01N27/72 ,  G01N33/12

CPC分类号： G01N27/902

摘要： A flaw sensor for a metal pipe has an exciting coil for generating remote field eddy currents in the pipe. First and second groups of receiving coils are spaced from the exciting coil by respective distances along the axis of the pipe in a region of the generated remote field eddy currents. The first and second groups have respective pluralities of receiving coils with axes perpendicular to the pipe axis and disposed circumferentially about the pipe axis at predetermined angular increments wherein the receiving coils of the second group are staggered relative to the receiving coils of the first group. A third receiving coil is disposed coaxially with the pipe at still another distance from the exciting coil along the pipe axis but also in the region of the generated remote field eddy currents. When a defect in the thickness of the metal pipe is encountered, a magnetic field caused by the defect to be perpendicular to the axis of the pipe is detected by one or more of the receiving coils of the first and/or second group. The third receiving coil detects phase changes to the magnetic field generated parallel to the pipe by the eddy currents. A ratio of phase changes produced by a standard thickness of a reference pipe and a sample subject pipe is used as a correction factor for detected phase changes in a defective pipe to accurately calculate the defective wall thickness.

摘要翻译： 用于金属管的缺陷传感器具有用于在管道中产生远场场涡流的励磁线圈。 第一组和第二组接收线圈在所产生的远场涡流的区域中沿着管的轴线与励磁线圈隔开相应的距离。 第一组和第二组具有各自的多个接收线圈，其轴线垂直于管轴线并以预定的角度增量围绕管轴线周向设置，其中第二组的接收线圈相对于第一组的接收线圈交错。 第三接收线圈在与激励线圈沿着管轴线更远的距离处与管道同轴设置，但也在所产生的远场涡流的区域中。 当遇到金属管的厚度缺陷时，由第一和/或第二组的一个或多个接收线圈检测由该缺陷引起的垂直于管轴的磁场。 第三接收线圈通过涡流检测与管道平行产生的磁场的相位变化。 使用由参考管和样本对象管的标准厚度产生的相变的比率作为有缺陷管中检测到的相变的校正因子，以精确地计算缺陷壁厚度。

公开(公告)号：US6123027A

公开(公告)日：2000-09-26

申请号：US212398

申请日：1998-12-16

申请人： Kiichi Suyama ,  Seiji Mizukami ,  Toshihide Kawabe ,  Yoshio Ido

发明人： Kiichi Suyama ,  Seiji Mizukami ,  Toshihide Kawabe ,  Yoshio Ido

IPC分类号： F16L55/00 ,  F16L55/16 ,  F16L55/28 ,  B61B13/10

CPC分类号： F16L55/28

摘要： A running apparatus within a pipe runs such that a center axis of a main body of the running apparatus is automatically coincided with a center axis of the pipe during running, and smoothly runs within a curved pipe. The running apparatus comprises two pairs of wheel supporting arms (3a, 3a', 3b, 3b') having an end rotatably fixed to an end portion of the main body (1) of the running apparatus, a wheel for driving the running (5) fixed to each of the other ends of two pairs of wheel supporting arms and rotated by a drive mechanism (a motor), an interlocking mechanism (a slider and a link) provided with a spring for urging two pairs of wheel supporting arms to which the wheels for driving the running are fixed in such a manner as to open around the one end of the main body of the running apparatus, a rotational potentiometer for measuring an angle of incline of each of two pairs of wheel supporting arms so as to output a data of an angle of incline and an attitude control portion (20) for returning an attitude of the main body of the running apparatus to a normal attitude state by controlling the drive mechanism on the basis of the data of the angle of incline with respect to each of two pairs of wheel supporting arms output from the rotational potentiometer.

摘要翻译： 管道内的运行装置运行，使得运行装置的主体的中心轴线在运行期间自动与管道的中心轴线重合，并且在弯曲管道内平稳地运行。 运行装置包括两对车轮支撑臂（3a，3a'，3b，3b'），其具有可旋转地固定到行驶装置的主体（1）的端部的端部，用于驱动行驶（5 ）固定到两对车轮支撑臂的每个另一端并由驱动机构（电动机），互锁机构（滑块和连杆）旋转的联锁机构（滑块和连杆），弹簧用于推动两对车轮支撑臂， 用于驱动行驶的车轮以围绕运行装置的主体的一端打开的方式固定，用于测量两对车轮支撑臂中的每一个的倾斜角度的旋转电位计，以便输出 倾斜角度的数据和姿态控制部分（20），用于通过基于倾斜角度的数据来控制驱动机构，使运行装置的主体的姿态恢复到正常姿势状态 对于每对两对wh 鳗鱼支持从旋转电位器输出的臂。