Abstract: Eddy current sensing is governed by the diffusion equation of magnetoquasistatic fields. As such the eddy current sensor's proximity to the object to be inspected (i.e., “liftoff”) significantly affects the sensor's response signal. Methods and apparatus are disclosed for improving performance for an eddy current sensor, though they may also be used for other sensor types. These solutions are beneficial for both single channel eddy current sensors and arrays, and are particularly beneficial for measuring parts with complex surfaces. In some aspects improved performance is achieved by varying the stiffness of the mechanical support for the sensor. Some mechanical supports may exhibit anisotropic stiffness. After performing a scan with an eddy current array, a multi-channel shape filtering module is applied to improve defect detection. The module reduces the variability of defect response measured due to the unpredictability of the defect location transverse to the scan direction.

Abstract: High-speed tubular inspection systems include a frame at least one magnetic flux generator contained in a coil annulus and a detector assembly each having inlet and outlet openings for passing a tubular member there through. The detector assembly has one or more magnetic detectors and one or more eddy current detectors configured to be spaced a first distance from the tubular member during an inspection. The detectors are each contained in one or more EMI detector shoes. A conveyor supports the frame and a drive mechanism configured to drive the tubular member through the coil annulus (or drive the coil annulus past the tubular member) at high-speeds.

Abstract: An electron intrinsic spin analyzer measures the quantum states from a free-electron beam wherein the intrinsic-spin property of the electron's beam interacted with an inhomogeneous magnetic field. The generated beam from a hot tungsten wire paralleled after the initial deflecting and absorbing process by metal grids, and the paralleled beam travels without electrical or magnetic focusing through on a glass lamp. A graphite cover on both sides of the glass lamp and a gitter composed of cesium dioxide and barium absorbed other types of particles such as ions and atoms to do not hit the fluorescent plate. The free-electron beam interacted with independent assemblies of magnets on the moveable chassis, which produced from a homogeneous or inhomogeneous magnetic field and used for checking the rightness of the measured physics effects. The optically and electrically detections collected the data with a Langmuir probe and a charge-coupled device camera.

Abstract: Tubular member inspection apparatus, systems and methods for inspecting tubulars of a variety of diameters. An EMI inspection shoe includes a flexible, generally arcuate body having a leading end, a trailing end, a non-working major face, and a working major face. The leading end, trailing end, non-working major face, and working major face at least partially define an inspection zone therebetween. One or more magnetic flux detectors are carried by the flexible, generally arcuate body in the inspection zone. One or more pressure actuators removably attached to the non-working face are configured to exert pressure on one or more regions of the flexible, generally arcuate body in the inspection zone during an EMI inspection of a tubular, forcing the flexible, generally arcuate body to contort into a generally contoured shape as it passes over a contoured region of the tubular.

Abstract: Provided are a method and a device capable of: generating a first alternating current magnetic field passing through a chamber having a cell disposed therein, by using a plurality of primary coils arranged on a first plane; receiving a second alternating current magnetic field by using a plurality of secondary coils arranged on a second plane; and measuring an impedance change of a cell by using the first alternating current magnetic field and the second alternating current magnetic field.

Abstract: 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.

Abstract: The present disclosure provides a construction structure corrosion measurement sensor having accuracy higher than that of conventional sensors, and a method for measuring corrosion by using the same. To this end, the present disclosure provides a sensor assembly including an eddy-current sensor including an insulator a coil surrounding the outer periphery of the insulator. The present disclosure also provides a construction structure corrosion measurement method including the steps of: positioning a sensor assembly next to a rebar inside a construction structure in parallel with and adjacent to the rebar; applying a voltage to the sensor assembly; measuring a voltage generated by an eddy current resulting from the adjacent rebar; and conducting measurement at a predetermined time interval so as to measure a voltage change.

Abstract: An inspection system configured to inspect a device within a substrate is provided. The inspection system includes an inspection module, an alignment module, a supporting device and a fixing device. The inspection module has multiple testers and multiple inspection chambers. The multiple testers are allowed to be accommodated in the multiple inspection chambers, respectively. The alignment module has an aligner. The aligner is placed in an alignment space. The aligner is configured to adjust a position of the substrate to be inspected with respect to one tester of the multiple testers, which is accommodated in the alignment space. The supporting device is configured to support the tester accommodated in the alignment space from below. The fixing device is configured to fix the tester accommodated in the alignment space in cooperation with the supporting device.

Abstract: A method of determining properties of a fluid having an oil phase, a water phase, and an emulsion phase between the oil phase and water phase includes emitting an electromagnetic wave into the fluid, measuring an amplitude of a reflection of the electromagnetic wave off an interface between the oil phase in order to determine a height of a coalescing portion of the oil/emulsion interface. A height of a creaming portion of the emulsion/water interface is then determined using the coalescing portion height, total fluid height and water-in-liquid ratio. A thickness of the emulsion phase is determined based on the difference between coalescing and creaming portion height.

Abstract: ABSTRACT A control method of a measurement supplied by a first turbomachine sensor by a first channel, and by a second turbomachine sensor by a second communication channel includes: acquiring the first signal from the first communication channel and the second signal from the second communication channel; determining of a validity status of each of the acquired signals; and transmitting of a signal to be processed.

Abstract: An MRI apparatus according to an embodiment includes a whole body RF coil accommodated in a gantry. The whole body RF coil includes a first element unit used for transmission of a radio frequency magnetic field; and a second element unit used for reception of a magnetic resonance signal produced from a subject having been applied with the radio frequency magnetic field. The first element unit is a birdcage-type RF coil having two end rings and a plurality of rungs spaced apart from each other along the circumferential direction of the end rings. The second element unit is a microstrip antenna.

Abstract: A device management apparatus 31 communicates with a plurality of devices to be managed. When an imaging apparatus in which abnormality occurs is detected, or in a case where any imaging apparatus is specified by a user from the imaging apparatuses in which the abnormality occurs, the device management apparatus 31 communicates with the imaging apparatus located within a specific range based on a position of the detected imaging apparatus in which the abnormality occurs or the imaging apparatus in which the abnormality occurs specified by the user, and performs the device specification display using a display unit of the imaging apparatus located within the specific range. By referring to the device specification display, the user may easily specify a desired device, for example, the device in which the abnormality occurs from a plurality of devices.

Abstract: Tubular member end area inspection systems and methods. One system includes a frame, a movable carriage including a magnetic flux generator, and inner and outer detector assemblies. The movable carriage, magnetic flux generator, inner and outer detector assemblies each have an inlet opening for accepting an end area of a tubular member therein and between the inner and outer detector assemblies. The inner and outer detector assemblies each having one or more magnetic or eddy current detectors adapted to be spaced a distance from inner and outer surfaces of the end area of the tubular member. An actuator assembly connecting the frame and the movable carriage includes a sensor adapted to sense an end of the tubular member and direct the movable carriage from a rest position to an inspection position about the end area of the tubular member.

Abstract: Provided are a main control system and a device for a nuclear magnetic resonance logging while drilling tool, the system includes: a digital signal processor, an auxiliary measurement module, a pulse signal generation module and a memory disposed in a downhole drilling tool; wherein the digital signal processor is communicatively connected to an upper computer arranged on the ground, the auxiliary measurement module and the pulse signal generation module respectively; the memory is communicatively connected to the pulse signal generation module. The main control system and a device for a nuclear magnetic resonance logging while drilling tool achieve the effect of improving the accuracy of the logging data.

Abstract: An inductive absolute position sensor has a scale with planar conducting features on a pattern repeating every spatial period TC along a measuring path and a reading head with planar windings: multipolar sine and cosine sense windings of spatial period TF=TC/M, M an integer, a unipolar first drive winding surrounding the sense windings and a multipolar second drive winding of spatial period TC/N along the measuring path, with N=M±1. An electronic circuit makes a first mode measurement using the first drive winding and a second mode measurement using the second drive winding. The absolute position in a range TC is computed from both modes' measurements. The sensor may be as compact as the incremental sensor it replaces, as the scale pattern and second drive winding needed for making it absolute do not need extra space.

Abstract: A lidar sensor assembly includes a detector array having a plurality of photodetectors. An integrated circuit is bonded to the detector array via a plurality of connection bumps. A reference trace is defined by conductive material on at least one of the integrated circuit and the detector array. A test trace is defined by conductive material on the detector array, at least two of the connection bumps, and conductive material on the integrated circuit. A resistance measuring device is configured to independently measure a reference resistance along the reference trace and a test resistance along the test trace. The assembly also includes a processor in communication with the resistance measuring device. The processor is configured to receive the reference resistance and the test resistance, subtract the reference resistance from the test resistance to produce a bond resistance, and compare the bond resistance to a predetermined resistance value.

Abstract: An accurately positionable computer host power-on detection machine comprises a detection box with an opening on the left side, the detection box is internally connected with a detection discharge block through a lifting device, the right part of the detection discharge block is provided with a positioning interception block, the height of the positioning intercept block is the same as the host and the center of the positioning interception block is provided with a detection port of 0.6-0.8 times the size of the rear side plate of the host, the inner side of the upper plate of the detection box is connected with an upper limit plate through a connecting plate, the detection box is provided with a positioning and clamping device cooperated with the left and right side plates of the host, and the inner side of the right side plate of the detection box is provided with a detection device which enables a detection insert block to move horizontally left and right.

Abstract: An optical characteristics measuring device includes a first light source capable of irradiating a sample with light and a second light source capable of irradiating the sample with microwaves. A measuring device measures microwave power of the reflection of the microwaves from the sample. A calculation unit calculates a parameter relating to the electrical conductivity of the sample using the microwave power of the reflected waves measured by the measuring device. A control unit controls the intensity of the light of the first light source so that the parameter becomes approximately a predetermined value. The calculation unit specifies first to n-th intensities of the light at which the parameter becomes approximately the predetermined value for each of the first to n-th wavelengths of the light and obtains relationships between the first to n-th wavelengths and the first to n-th intensities corresponding to the respective first to n-th wavelengths.

Abstract: The invention relates to a cable for electrically linking electronic assemblies, components or peripherals of a magnetic resonance apparatus by means of a symmetrical shielded cable which shields a plurality of conductors for a useful signal with respect to influences of an electromagnetic alternating field by means of at least one shielding device. In order to suppress sheath waves, a shielding device comprises at at least one point an interruption which is bridged by an active resistance or a reactance.

Abstract: An inductive sensor, particularly for a proximity sensor, includes a resonance circuit including a sensing coil and an amplifier comprising a first gain stage and a second gain stage each coupled via respective adjusting elements with the resonance circuit to inject energy for maintaining an oscillation of the resonance circuit. The first gain stage provides a substantially linear amplification and the second gain stage provides a comparator characteristics.