公开(公告)号：EP2373986A4

公开(公告)日：2015-01-21

申请号：EP09836822

申请日：2009-12-15

申请人： NDT TECHNOLOGIES INC

发明人： WEISCHEDEL HERBERT R

IPC分类号： G01N27/82 ,  G01N27/72 ,  G01R33/12

CPC分类号： G01N27/9033

摘要： A magnetic inspection device for nondestructively inspecting elongated objects, such as wire cables, pipes, and the like, for loss of metallic cross-section due to abrasion, corrosion, and external and internal discontinuities, having a magnet for inducing in sections of the object between the stations, magnetic flux at the saturation level. A magnetic flux detector having magnetic sensors positioned between the poles and laterally of the elongated object utilizes shields and flux decompressors to render the flux detector more sensitive to leakage flux caused by discontinuities in the objects.

公开(公告)号：EP2788781A1

公开(公告)日：2014-10-15

申请号：EP12855331.0

申请日：2012-12-07

申请人： NDT Technologies

发明人： WEISCHEDEL, Herbert R.

IPC分类号： G01R33/12

CPC分类号： G01N27/83 ,  G01N27/9033 ,  G01N27/9046

摘要： A magnetic inspection device and method for nondestructive testing of wire ropes and the like utilizes a leakage flux generator moveable relative to a wire rope to be inspected for inducing in sections of the wire rope magnetic flux at a saturation level. A leakage flux detector moves with the leakage flux generator, and cooperates with the leakage flux generator for detecting leakage flux at the outer surface of the wire rope saturated by the generator. The detector provides a high fidelity signal representative of the loss of metallic cross section at individual locations along the wire rope. A signal processor receiving the high fidelity signal representative of the loss of metallic cross section from the detector extracts a wire rope roughness component from the high fidelity signal.

公开(公告)号：EP0121084A2

公开(公告)日：1984-10-10

申请号：EP84101978.9

申请日：1984-02-24

申请人： NDT Technologies, Inc.

发明人： Weischedel, Herbert R.

IPC分类号： G01N27/82

CPC分类号： G01N27/82

摘要： A magnetic device for non destructively inspecting elongated objects such as wire cables and the like, for loss of metallic cross-section due to abrasion and corrosion and internal defects as magnets which induce a saturated magnetic field axially through a short section of the cable as the device and the cable move relative to one another. A sensing coil located in close proximity to the cable between the magnetic poles detects small changes in leakage flux at the surface of the cable in the saturated condition. The sensed flux changes are applied to an integratorto measure the net variation in flux and correspondingly the total change in cross section. Multiple sense coils mounted on core pieces conforming to the external surface of the cable ensure complete continuity of the inspection process and allow the magnetic device to be installed and removed at intermediate stations along the cable.

公开(公告)号：EP2373986A2

公开(公告)日：2011-10-12

申请号：EP09836822.8

申请日：2009-12-15

申请人： NDT Technologies, Inc.

发明人： WEISCHEDEL, Herbert, R.

IPC分类号： G01N27/82 ,  G01R33/12 ,  G01N27/72

CPC分类号： G01N27/9033

摘要： A magnetic inspection device for nondestructively inspecting elongated objects, such as wire cables, pipes, and the like, for loss of metallic cross-section due to abrasion, corrosion, and external and internal discontinuities, having a magnet for inducing in sections of the object between the stations, magnetic flux at the saturation level. A magnetic flux detector having magnetic sensors positioned between the poles and laterally of the elongated object utilizes shields and flux decompressors to render the flux detector more sensitive to leakage flux caused by discontinuities in the objects.

公开(公告)号：EP0121084B1

公开(公告)日：1989-01-04

申请号：EP84101978.9

申请日：1984-02-24

申请人： NDT Technologies, Inc.

发明人： Weischedel, Herbert R.

IPC分类号： G01N27/82

CPC分类号： G01N27/82

公开(公告)号：EP0121084A3

公开(公告)日：1985-06-26

申请号：EP84101978

申请日：1984-02-24

申请人： NDT Technologies, Inc.

发明人： Weischedel, Herbert R.

IPC分类号： G01N27/82

CPC分类号： G01N27/82

摘要： A magnetic device for non destructively inspecting elongated objects such as wire cables and the like, for loss of metallic cross-section due to abrasion and corrosion and internal defects as magnets which induce a saturated magnetic field axially through a short section of the cable as the device and the cable move relative to one another. A sensing coil located in close proximity to the cable between the magnetic poles detects small changes in leakage flux at the surface of the cable in the saturated condition. The sensed flux changes are applied to an integratorto measure the net variation in flux and correspondingly the total change in cross section. Multiple sense coils mounted on core pieces conforming to the external surface of the cable ensure complete continuity of the inspection process and allow the magnetic device to be installed and removed at intermediate stations along the cable.

公开(公告)号：EP2788781B1

公开(公告)日：2018-02-07

申请号：EP12855331.0

申请日：2012-12-07

申请人： NDT Technologies

发明人： WEISCHEDEL, Herbert R.

IPC分类号： G01R33/12 ,  G01N27/83 ,  G01N27/90

CPC分类号： G01N27/83 ,  G01N27/9033 ,  G01N27/9046

摘要： A magnetic inspection device and method for nondestructive testing of wire ropes and the like utilizes a leakage flux generator moveable relative to a wire rope to be inspected for inducing in sections of the wire rope magnetic flux at a saturation level. A leakage flux detector moves with the leakage flux generator, and cooperates with the leakage flux generator for detecting leakage flux at the outer surface of the wire rope saturated by the generator. The detector provides a high fidelity signal representative of the loss of metallic cross section at individual locations along the wire rope. A signal processor receiving the high fidelity signal representative of the loss of metallic cross section from the detector extracts a wire rope roughness component from the high fidelity signal.

公开(公告)号：EP2788781A4

公开(公告)日：2015-09-23

申请号：EP12855331

申请日：2012-12-07

申请人： NDT TECHNOLOGIES

发明人： WEISCHEDEL HERBERT R

IPC分类号： G01R33/12

CPC分类号： G01N27/83 ,  G01N27/9033 ,  G01N27/9046

摘要： A magnetic inspection device and method for nondestructive testing of wire ropes and the like utilizes a leakage flux generator moveable relative to a wire rope to be inspected for inducing in sections of the wire rope magnetic flux at a saturation level. A leakage flux detector moves with the leakage flux generator, and cooperates with the leakage flux generator for detecting leakage flux at the outer surface of the wire rope saturated by the generator. The detector provides a high fidelity signal representative of the loss of metallic cross section at individual locations along the wire rope. A signal processor receiving the high fidelity signal representative of the loss of metallic cross section from the detector extracts a wire rope roughness component from the high fidelity signal.