A set of radial springs to bias the sensor arms of an inline pipeline inspection tool radially outward towards the pipe wall. The springs are resilient clips typically made of metal which bias adjacent sensor arms away from one another and radially outward. There are two sets of springs, a forward set and a rearward set which operate independent of each other. Each set of springs operates on a plane which is perpendicular to the axis of the body of the tool and perpendicular to the planes upon which the sensor arms extend.

A set of radial springs to bias the sensor arms of an inline pipeline inspection tool radially outward towards the pipe wall. The springs are resilient clips typically made of metal which bias adjacent sensor arms away from one another and radially outward. There are two sets of springs, a forward set and a rearward set which operate independent of each other. Each set of springs operates on a plane which is perpendicular to the axis of the body of the tool and perpendicular to the planes upon which the sensor arms extend.

An inline inspection tool of this disclosure includes at least one sensor arm (50) having a sensor head (30) located at its distal end (51), the sensor head including an arched-shaped pipe contacting portion (33) between its forward and rearward ends (32, 34), the pipe contacting portion having a radius R and a width W.sub.C; and at least one triaxial sensor element (31) having at least a portion located directly below the arched-shaped pipe contacting portion and having a width W.sub.S, W.sub.C<W.sub.S. During the tool's travel through a pipeline, contact of the sensor head with the pipe wall lies along a single line of travel substantially equal to the width W.sub.C. Because of its shape, the sensor head better traces and maintains contact with the pipe wall to detect dents, wrinkles, weld intrusions, and other defects or anomalies in the pipe wall.

An inline inspection tool of this disclosure includes at least one sensor arm (50) having a sensor head (30) located at its distal end (51), the sensor head including an arched-shaped pipe contacting portion (33) between its forward and rearward ends (32, 34), the pipe contacting portion having a radius R and a width W.sub.C; and at least one triaxial sensor element (31) having at least a portion located directly below the arched-shaped pipe contacting portion and having a width W.sub.S, W.sub.C<W.sub.S. During the tool's travel through a pipeline, contact of the sensor head with the pipe wall lies along a single line of travel substantially equal to the width W.sub.C. Because of its shape, the sensor head better traces and maintains contact with the pipe wall to detect dents, wrinkles, weld intrusions, and other defects or anomalies in the pipe wall.

A magnetic inspection system and method for detecting and mapping magnetic anomalies in a section of pipe. The inspection system includes a probe with first and second arrays of magnetic field sensors arranged in first and second layers such that the first and second arrays are spaced from the section of pipe under inspection by different radial distances. Data from the probe is used to create a graphical representation of the inspected area.

A magnetic inspection system and method for detecting and mapping magnetic anomalies in a section of pipe. The inspection system includes a probe with first and second arrays of magnetic field sensors arranged in first and second layers such that the first and second arrays are spaced from the section of pipe under inspection by different radial distances. Data from the probe is used to create a graphical representation of the inspected area.

Here is described an apparatus for measuring and/or monitoring a strength of a magnetic field inside a sample including: a fixing unit made of a non-magnetic material; a magnetic field strength measuring device having a sensor; and a first elongated member and a second elongated member. The elongated members are made of a material having a high relative magnetic permeability, and each of the elongated members has a first end portion and a second end portion. The fixing unit is configured to support the elongated members in a fixed posture such that the first end portion of the first elongated member and the first end portion of the second elongated member are positioned opposite to each other to form a gap, and the fixing unit is configured to support the sensor of the measuring device inside the gap or substantially inside the gap.

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.

An eddy current instrument for non-destructive testing of a tubular metallic object, the instrument comprising a probe head with probe coils and probe coil signal conditioning and analog to digital conversion electronics and a probe connector module with a processor and probe coil excitation signal generation electronics. The probe connector processor is configured to interface to an external computing device, which may be a personal computer. The probe head and probe connector module may be connected by a rigid shaft or by a flexible coupling.