A device and method for detecting wire breakage are provided. The wire breakage detection device includes an excitation coil, a detection coil, and a processor. The detection signal input end of the processor is connected to the detection coil. The excitation coil and the detection coil are located on two sides of a longitudinal section of an inner wall of a to-be-detected pipeline respectively, wherein a conductive closed structure is formed continuously and annularly in the to-be-detected pipeline, the axis of the excitation coil is parallel to the axis of the to-be-detected pipeline, and the axis of the detection coil is perpendicular to the axis of the to-be-detected pipeline. The excitation coil is configured to generate an alternating magnetic field according to an alternating electromagnetic signal, wherein an induced current and an electromagnetic field of the induced current are generated by the to-be-detected pipeline located in the alternating magnetic field.

A device and method for detecting wire breakage are provided. The wire breakage detection device includes an excitation coil, a detection coil, and a processor. The detection signal input end of the processor is connected to the detection coil. The excitation coil and the detection coil are located on two sides of a longitudinal section of an inner wall of a to-be-detected pipeline respectively, wherein a conductive closed structure is formed continuously and annularly in the to-be-detected pipeline, the axis of the excitation coil is parallel to the axis of the to-be-detected pipeline, and the axis of the detection coil is perpendicular to the axis of the to-be-detected pipeline. The excitation coil is configured to generate an alternating magnetic field according to an alternating electromagnetic signal, wherein an induced current and an electromagnetic field of the induced current are generated by the to-be-detected pipeline located in the alternating magnetic field.

A re-settable pipeline gauging tool (10) of this disclosure includes a cylindrical tool body (11) that includes a deformable portion (13) with a plurality of sensors (25) located near or on an external circumferential surface (12) of the deformable portion. A sealed unit (60) contains a corresponding signal source (25). Pipeline gauging relies upon the compressibility and elasticity inherent in the deformable portion as it encounters anomalies in pipeline geometry and moves between a first size and a second size, the signal strength of the source detected by the sensors changing as a result. The sensors may be arrayed in a circumferential band (47) about the deformable portion or along its length. In some embodiments, the sensors and source are magnetic or acoustic (e.g., transceivers or radar integrated chips). In other embodiments, the sensors and source are light or fiber optic.

Embodiments of an inline inspection (“ILI”) tool (10) of this disclosure include a plurality of composite field systems (20) arranged circumferentially about the body of the ILI tool, each composite field system including multiple magnetic circuits (60) to produce a composite or resultant angled field © relative to the target, along with a sensor array or circuit (40) configured for magnetic flux leakage (“MFL”) or magnetostrictive electro-magnetic acoustic transducers (“EMAT”) implementations. In embodiments, the pole magnets (61) of the magnetic circuits are oriented in the axial direction of the tool body rather than in the direction of the resultant angled field. The same is true of the sensors (43). This composite field system approach provides options to design geometries that were not previously possible in prior art single-circuit helical MFL designs and EMAT designs.

Embodiments of an inline inspection (“ILI”) tool (10) of this disclosure include a plurality of composite field systems (20) arranged circumferentially about the body of the ILI tool, each composite field system including multiple magnetic circuits (60) to produce a composite or resultant angled field © relative to the target, along with a sensor array or circuit (40) configured for magnetic flux leakage (“MFL”) or magnetostrictive electro-magnetic acoustic transducers (“EMAT”) implementations. In embodiments, the pole magnets (61) of the magnetic circuits are oriented in the axial direction of the tool body rather than in the direction of the resultant angled field. The same is true of the sensors (43). This composite field system approach provides options to design geometries that were not previously possible in prior art single-circuit helical MFL designs and EMAT designs.

Robotic inspection device for tank and pipe inspections includes a housing configured to be positioned on a portion within a flow apparatus. The portion has a wall with a coating on the wall. The coating has a coating thickness. The device has a magnetic transducer mounted to the housing. The magnetic transducer is configured to measure a magnetic flux permeability through the coating on the wall. A computer system is mounted to the housing. The computer system is operatively coupled to the magnetic transducer. The computer system includes one or more processors and a computer-readable medium storing instructions executable by the one or more processors to perform operations. The operations include receiving magnetic flux permeability measured by the magnetic transducer at a location on the portion and determining a coating thickness at the location based on the magnetic flux permeability measured at the location.

A device and a method for testing a steel defect based on internal and external magnetic perturbation. The device includes: a magnetizer comprising a magnetization source and a magnet yoke, arranged on a surface of a sample, and configured to generate two types of typical magnetic field regions applied to testing based on internal and external magnetic perturbation; a double-row magnetic sensor probe, configured to collect internal and external magnetic perturbation data; a master controller, configured to perform pre-processing on the internal and external magnetic perturbation data, and store the pre-processed data; scanner wheels, configured to generate a sampling trigger pulse during scanning to enable the master controller to receive the internal and external magnetic perturbation data from the probes; and a host computer, configured to analyze the pre-processed data uploaded by the master controller to obtain a defect quantitative result.

A device and a method for testing a steel defect based on internal and external magnetic perturbation. The device includes: a magnetizer comprising a magnetization source and a magnet yoke, arranged on a surface of a sample, and configured to generate two types of typical magnetic field regions applied to testing based on internal and external magnetic perturbation; a double-row magnetic sensor probe, configured to collect internal and external magnetic perturbation data; a master controller, configured to perform pre-processing on the internal and external magnetic perturbation data, and store the pre-processed data; scanner wheels, configured to generate a sampling trigger pulse during scanning to enable the master controller to receive the internal and external magnetic perturbation data from the probes; and a host computer, configured to analyze the pre-processed data uploaded by the master controller to obtain a defect quantitative result.

A robotic inspection system for broadcast tower support cables includes a self-propelled sensing device configured to move along a broadcast tower support cable for taking main magnetic flux (MMF) readings as the sensing device moves along the support cable. The system also includes a control station configured to wirelessly interface with the sensing device and to generate a broadcast tower support cable condition assessment report from the MMF readings to identify locations and sizes of deterioration of the broadcast tower support cable. The sensing devices includes a sensing array that is insulated from the electromagnetic radiation emitted from the broadcast tower.

Circumferential and axial magnetizers for a magnetic flux leakage pig. A magnet bar may comprise at least one magnet and may be configured to collapse radially inward to the shaft. Magnetizers may include a cushion disposed about the shaft and biasing the magnet bar against a pipe wall. A sensor head disposed between circuit poles at each polar end of the magnet monitors magnetic flux. The central shaft of a circumferential magnetizer or axial magnetizer may comprise a joint linking an additional smart pig module. A novel magnetizer cushion is described, as are smart pigs containing one or more circumferential or axial magnetizers.