A drive coil assembly to generate a specific spatial distribution of eddy currents within the walls of a conductive tube or pipe, which may be used in conjunction with a separate array of magnetic sensors to detect defects in the tubing wall. The drive coil assembly comprises a plurality of coils which are generally wrapped around the circumference of a cylindrical probe body, but which are further shaped with serpentine undulation in the axial direction. The undulation is characterized by a spatial amplitude, a spatial phase and a spatial frequency; typically, the spatial frequency results in an integer number of undulations around the circumference of the drive coil and the phase is chosen to uniformly distribute the lobes about the circumference. The temporal phase of the electrical current in each coil is chosen to null out net current of the assembly around the circumference.

This invention is directed to an automatic inspection system of welding spots in the car body and a control method thereof, the automatic inspection system comprising a controller and a robot arm, a probe device, and a visual system, wherein the robotic arm holds a camera and the probe device, the probe device targets at car body welding spot and form the first included angle with the camera. Many lighting sources are distributed around the camera, which form the second included angle with the camera. The camera is connected with Image Collecting and Processing Device to obtain position data of welding spot in the car body, the controller is connected with Image Collecting and Processing Device by network, and foresaid controller rectifies position of the probe on the robotic arm according to the position of welding spot in the car body.

A method for measuring formation conductivity distribution based on transient electromagnetic eddy current field is provided. The method includes arranging a transmitter coil and a first array receiver coil to a target stratum of a transmitter well, arranging a second array receiver coil to a target stratum of a receiver well, periodically turning on and off the transmitter coil, moving the transmitter coil and the first array receiver coil for a first preset distance, acquiring a first eddy current signal of the first array receiver coil and a second eddy current signal of the second array receiver coil in a moving process of the first preset distance, moving the second array receiver coil for a second preset distance, moving the transmitter coil and the first array receiver coil for the first preset distance till the measurement of the whole well segments is completed, and obtaining formation conductivity distribution.

An automated apparatus for large-area scanning of wind turbine blades or other large-bodied structures (such as aircraft fuselages and wings) for the purpose of non-destructive inspection (NDI). One or more vacuum-adhered scanning elements containing NDI sensors are lowered via cables and moved via a motorized cart driven along a leading edge of a horizontally disposed wind turbine blade or via a motorized carriage driven around a track attached to a vertically disposed wind turbine blade. Scan passes are based upon sequenced horizontal and vertical motions of scan heads provided by cart/carriage and cable spool motion. A conformable array of sensors attached to the cart may be used to collect NDI data along the leading edge of a horizontally disposed wind turbine blade if the scan heads cannot reach that area.

Some embodiments of the invention may include an eddy current nondestructive evaluation device. The eddy current nondestructive evaluation device may include a rotating body; a motor coupled with the rotating body such that the motor rotates the rotating body; a permanent magnet coupled with the rotating body; a pickup coil coupled with the rotating body; and an integrator circuit electrically coupled with the pickup coil that integrates a voltage from the pickup coil to produce integrated voltage data.

Some embodiments of the invention may include an eddy current nondestructive evaluation device. The eddy current nondestructive evaluation device may include a rotating body; a motor coupled with the rotating body such that the motor rotates the rotating body; a permanent magnet coupled with the rotating body; a pickup coil coupled with the rotating body; and an integrator circuit electrically coupled with the pickup coil that integrates a voltage from the pickup coil to produce integrated voltage data.

A conforming eddy current testing (ECT) probe for performing eddy current testing when placed on the surface of a test object. An eddy current array is fabricated on a flexible substrate. A shape metal alloy (SMA) piece is manufactured to have an original shape that conforms to the surface of the test object, and then affixed to the substrate. The SMA piece has as much or more flexibility than the substrate, so that it can be manipulated into position. Just prior to testing, the SMA piece is actuated to revert to its original shape.

A method of testing of a component of a system that includes a pipe of a first length is provided. The method includes the steps of: providing a second length of stock pipe, the second length being greater than the first length; cutting the stock pipe to the first length to produce a cut pipe; inspecting the cut pipe using a non-destructive inspection technique. The non-destructive inspection technique includes the steps of: performing a first non-destructive test on an inner surface of the cut pipe; performing a second non-destructive test on an outer surface of the cut pipe. The method further includes the step of rejecting the cut pipe if the step of inspecting the pipe identifies a flaw.

The mobile non-destructive testing inspection system includes a mobile platform, a robotic arm mounted on the mobile platform, and an end effector for the robotic arm. The end effector includes a non-destructive testing (NDT) probe. As a non-limiting example, the NDT probe may be an eddy current testing probe. The mobile platform may be a robotic mobile platform under external control by a remote operator. The robotic arm is mounted on the mobile platform using a mounting plate, which is secured to an upper surface of the mobile platform, and includes a bracket or the like for attachment to a base of the robotic arm. The end effector is connected to an end connector of the robotic arm. The NDT probe of the end effector may be mounted on a support member, which may be selectively rotatable with respect to the end connector of the robotic arm.

Provided are a method and device for detecting arrangement disorder of fibers in a conductive composite material. A coil (7) is disposed at a position at which the coil (7) faces the conductive composite material, and thereby a current can be applied to the conductive composite material. Thus, work or the like for attaching electrodes to the conductive composite material is not required. As a result, the arrangement disorder of the fibers in the conductive composite material can easily be detected. A method for detecting meandering of fibers in a conductive composite material includes a step of disposing a magnetic field sensor (8) at a position at which the magnetic field sensor (8) faces a surface (Sa) of the conductive composite material such that a direction (D) of a magnetosensitive axis is horizontal with the surface (Sa) and is parallel to coil faces (7e). Therefore, the magnetic field sensor (8) measures a magnetic field, and thereby a portion at which the arrangement disorder of the fibers in the conductive composite material is present can be detected.