An inspection tool apparatus includes a core having an axial length. The axial length is determined based on a desired depth of inspection radially from the core. A plurality of arms are coupled to and extend radially from the core. The core and the plurality of arms comprise a high permeability magnetic material. The core or at least one of the plurality of arms is wound by a respective coil that is positioned to receive magnetic flux that is passing through the core or at least one of the plurality of arms.

An inductive transducer apparatus for testing metallic objects using Pulsed Eddy Current topology. The Apparatus includes a transmitter coil, a receiver coil, and a hybrid core. The hybrid core has a high saturation point which allows the transducer to generate a strong initial magnetic field that may further induce strong eddy currents on the surface of the target capable of penetrating deep into metallic objects under inspection. The hybrid core also has a high permeability which enhances the transducer's sensitivity and allows to maintain high signal-to-noise-ratio and of the received signal associated with Eddy Current magnetic field decaying, thus enhancing the system's performance in environments where reliable quantitative analysis of flaws located deep underneath the surface of metal objects is required. A linearity compensation method may be applied to further enhance the performance of the system.

Device for inspecting an inner wall surface of a metal tube having a linear drive, an elongated probe holder and an eddy current probe. The eddy current probe is mounted on probe holder and the probe holder is operatively connected to linear drive in such manner that probe holder is movable together with eddy current probe in an axial feed direction through tube to be tested when device is in operation.

The invention relates to a method for observing a magnetic field of a material volume, in particular for determining properties of a workpiece under, in particular, magnetic, mechanical, thermal, and/or electrical excitation of a material volume of the workpiece, wherein the magnetic field of the material volume is sensed as a function of time and of frequency with high frequency resolution.

A system for assembling two parts, in particular parts forming the fuselage or the wings of an aircraft, includes a positioning aid guiding positioning tools so as to juxtapose the two parts at the level of an assembly zone. The assembly system further includes a set of eddy current sensors positioned in at least one of the two parts to determine the separation of the two parts at the level of the assembly zone. If the separation does not conform to a predetermined criterion the positioning tools move at least one of the parts.

Provided are: a mechanical property measuring apparatus and method that can accurately measure a mechanical property through physical quantities; a substance manufacturing equipment and method that can improve the production yield rate. A mechanical property measuring apparatus (100) comprises: a physical quantity measuring unit (5) configured to measure a plurality of physical quantities of a measured object that includes a substance and a film on a surface of the substance; a classification processing unit (81) configured to select one of a plurality of calculation models (M.sub.1, M.sub.2, . . . , M.sub.n) for calculating a mechanical property of the substance, based on at least two of the plurality of physical quantities measured; and a mechanical property calculating unit (82) configured to calculate the mechanical property of the substance using the calculation model selected by the classification processing unit (81) and the at least two of the plurality of physical quantities.

A magnetic element for strengthening a magnetic field formed in an object and an eddy current sensor using the magnetic field are provided. The eddy current sensor includes a bottom face portion which is a magnetic body, a magnetic core portion provided at the middle of the bottom face portion and a peripheral wall portion provided on the periphery of the bottom face portion. The eddy current sensor further includes an excitation coil disposed on an outer periphery of the magnetic core portion and capable of generating a magnetic field and an excitation coil disposed on an outer periphery of the peripheral wall portion and capable of generating a magnetic field.

A magnetic element for strengthening a magnetic field formed in an object and an eddy current sensor using the magnetic field are provided. The eddy current sensor includes a bottom face portion which is a magnetic body, a magnetic core portion provided at the middle of the bottom face portion and a peripheral wall portion provided on the periphery of the bottom face portion. The eddy current sensor further includes an excitation coil disposed on an outer periphery of the magnetic core portion and capable of generating a magnetic field and an excitation coil disposed on an outer periphery of the peripheral wall portion and capable of generating a magnetic field.

A device for detecting a crack in a battery cell, comprising: an inspection unit comprising a first sensor inducing an eddy current and a second sensor sensing a signal of the eddy current induced by the first sensor, and performing an inspection of the battery by using the eddy current while the battery cell is driven; a transfer unit for sequentially transferring a plurality of battery cells from a point where the battery cells are introduced to a point where the battery cells are taken out; and a control unit which is electrically connected to the inspection unit and receives, evaluates, and controls the eddy current signal sensed by the inspection unit.

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.