Abstract: A method for determining the location of underground cables and pipes is disclosed. In some embodiments, the method includes measuring a set of electromagnetic field magnitudes and phases at a plurality of positions while traversing a target line parallelly using 3D electromagnetic coil sensors, the 3D electromagnetic coil sensors being orthogonally oriented to the target line, modeling a set of expected complex electromagnetic field magnitudes of a single underground conductor at each of the positions to form a set of values corresponding to a set of individual models for the target line, determining which of the set of individuals models is a best model, determining confidence information at each of the positions based on a comparison between the measured set of complex electromagnetic magnitudes and phases and the best model, and determining parameters at each of positions related to the target line from the best model.

Abstract: A line locator includes a signal detector to detect signals from an underground line; an error modeler that models a phase error in the signal from neighboring underground lines; and an enhanced electromagnetic field modeler that provides a location of the underground line based on the signal and a result from the error modeler.

Abstract: Methods, systems, and computer readable media for wireless crack detection and monitoring are disclosed. According to one system, a crack detector is affixed to a surface of a material for detecting a crack in the material. In response to detecting a crack, a crack indicator is generated, indicating the existence of the crack. A mote wirelessly communicates the crack indicator to an external device. The mote may also store multiple crack indicators in local memory before being downloaded to the external device. In other embodiments, the mote may time-stamp the crack indicator for indicating a time when the crack was detected. Additionally, the mote may associate other information with the crack indicator such as temperature and acceleration information.

Abstract: In a general methodology for insulation defect identification in a generator core, a Chattock coil is used to measure magnetic potential difference between teeth. Physical knowledge and empirical knowledge is combined in a model to predict insulation damage location and severity. Measurements are taken at multiple excitation frequencies to solve for multiple characteristics of the defect.

Abstract: Method and device for nondestructive and noncontact detection of faults in a test piece, or electrically conductive particles in a liquid flow, moving past the device, using eddy currents. The test piece or flow is exposed to periodic alternating electromagnetic fields. A periodic electrical signal is detected by a receiver coil. The receiver coil signal has a carrier oscillation whose amplitude and/or phase is modulated by defects in the test piece or by electrically conducting particles and is digitized. A useful signal is produced from the digitized receiver coil signal, and the useful signal is evaluated with an evaluation unit to detect faults in the test piece or electrically conductive particles. When overdriving of the A/D converter stage by the receiver coil signal is ascertained, a part of the receiver coil signal truncated by the A/D converter stage is reconstructed using a mathematical approximation in the digitized receiver coil signal.

Abstract: A current sensor includes a magnetic balance sensor and a switching circuit. The magnetic balance sensor includes a feedback coil which is disposed near a magnetic sensor element varying in characteristics due to application of an induction field caused by measurement current and which produces a canceling magnetic field canceling the induction field. The switching circuit switches between magnetic proportional detection and magnetic balance detection. The magnetic proportional detection is configured to output a voltage difference as a sensor output. The magnetic balance detection is configured to output, as a sensor output, a value corresponding to current flowing through the feedback coil when a balanced state in which the induction field and the canceling magnetic field cancel each other out is reached after the feedback coil is energized by the voltage difference.

Abstract: A method for detecting breakage of a diesel particulate filter (DPF) for detecting a tiny breakage of the DPF may include obtaining a learned value of a flow resistance in the DPF when a regeneration of the DPF is terminated, calculating a predicted value of the flow resistance, determining whether the learned value is within a permissible error range of the predicted value, and determining that the DPF is broken if the learned value is not within the permissible error range. The method may further include storing an arithmetic average of the learned value according to a mileage of a vehicle and transforming a relation between the mileage and the learned value to a polynomial expression.

Abstract: A method for metallic structure maintenance is disclosed. The method includes a magneto-graphic/Magnetic Tomography technique to identify stress-related defects. The method is specifically optimized for extended, non-accessible underground and underwater metallic structures in providing quality control, emergency alarms as well as timeline planning for structural repairs and maintenance work. Examples of the method implementation include pipes for oil and gas industry, detection of flaws in rolled products in metallurgical industry, welding quality of heavy duty equipment such as ships reservoirs, etc. It is especially important for loaded constructions, such as pressured pipes, infrastructure maintenance, nuclear power plant monitoring, bridges, corrosion prevention and environment protection.

Abstract: A method of determining a crack depth of a crack in a metallic material including the steps: feeding a current with a first magnitude to a transmitter coil for generating a magnetic field in the metallic material; controlling the current such that it obtains a second magnitude when the magnetic field is estimated to have penetrated deeper than a deepest crack depth desired to be measured in the metallic material; detecting the magnetic field by means of a receiver coil; determining a first characteristic value of the signal in a first time range; determining a second characteristic value of the signal in a second time range after the first time range; and determining a possible presence of a crack and its crack depth based on the first characteristic value and the second characteristic value.

Abstract: A system and method suitable for producing user designated views of non-destructive inspection target with adjustable color, opacity and/or fill-patterns in coordination of the display of inspection scan images. The geometric definition of the inspection target and the inspection scan area are both prepared by independent processes under which vertices and respective primitives are established. The inspection target primitives are given an alpha texture that includes color, opacity and/or fill-pattern designated by the user. The scan area primitives are mapped by a color and/or opacity texture representing inspection signal information such as amplitude. An efficient commercially available graphics accelerator is used to render both of the images of inspection target's chosen view and that of scanned area. The method allows implementation in real-time and on hand-held devices.

Abstract: A damage detection apparatus and method which detect a damage occurring in a specimen include energizing an inspection area on a specimen into a predetermined energized condition, measuring a potential difference at predetermined intervals in the inspection area, and analyzing an existence or otherwise of a damage, and a shape thereof, based on a plurality of items of potential difference data. Parameters specifying a hypothetical damage are hypothesized in advance and, based on the potential difference data, calculation is executed using a maximum likelihood estimation method on a double body in which hypothetical specimens are doubled by bringing together their front surfaces, and furthermore on a quadruple body quadrupled by bringing rear surfaces of hypothetical specimens together, a maximum likelihood estimation value of the parameters is calculated.

Abstract: Modeling the gravitational field-induced or centrifugal field-induced separation of particles of a dispersion by use of one or more additional force fields that also influence the migration of the particles. A method includes detecting and measuring the modified separation behavior with the help of concentration-measuring sensors. The force acting upon the particles can be calculated from the change in velocity of the particles, and the corresponding particle properties can be calculated if the respective field intensities are known.

Abstract: An opposing field sensing element for ferromagnetic cable inspection is disclosed that uses magnetic flux sources and a magnetic flux sensor to detect anomalies in ferromagnetic cables. An array of opposing field sensing elements may be used to non-invasively inspect systems that contain ferromagnetic cables such as conveyer belts and the like. The opposing field sensing element is small and compact, and immune to vertical axis flutter and disturbances of the ferromagnetic cable being inspected. In addition, the opposing field sensing element does not magnetize the ferromagnetic cable being inspected such that interference with other sensing and control systems is minimized.

Abstract: A vibration and condition monitoring system and the parts thereof with a true digital signal processing based design, with very limited analog based general signal conditioning. Specifically a method of driving and a driver of eddy current probes that have a simple highly accurate analog part and a unit and a method of enabling efficient vibration monitoring in hazardous areas. This is achieved by an eddy current probe oscillator unit having independent control of an amplitude gain and control of an impedance measurement sensitivity, i.e. amplitude gain linearity in relation to probe impedance.

Abstract: A method for non-destructive health monitoring of a joined component includes: supplying a first current between a first end of a first member and a first end of a second member of the joined component; measuring a first voltage between a second end of the first member and a second end of the second member, wherein the first ends of the first member and the second member are situated opposite of at least one joint from the second ends of the first member and the second member; calculating a first joint resistance of the at least one joint from the supplied first current and the measured first voltage; comparing the calculated first joint resistance to a predetermined minimum joint resistance; and comparing the calculated first joint resistance to a predetermined maximum joint resistance, wherein the predetermined maximum joint resistance is greater than the predetermined minimum joint resistance.

Abstract: A potentiostat data link (PDL) unit is provided which can remotely monitor the formation and growth of cracks in metal structures. A PDL includes a sealed box containing two or more modified potentiostats, a power supply, a CPU, a memory device, and computer networking capability. The PDL can be mounted in a remote, difficult-to-access location. Each potentiostat has a lead to a sensor affixed to a structure to be analyzed for the presence of growing cracks due to metal fatigue in a metal structure.

Abstract: A detection apparatus for an eddy current in a heat generating tube using a permeability measurement method, and a method using the apparatus are provided. In the detection apparatus, a bobbin type probe acquires detection information with respect to a magnetic flux change by a magnetic phase occurring in the heat generating tube using a coil which is wound in an axis direction of at least one yoke located in a perpendicular direction with a bobbin of the bobbin type probe, and a material having a corresponding magnetic phase and a circumferential defect, which is difficult to be detected by the bobbin type probe, are detected based on the detection information.

Abstract: This invention relates to methods and apparatus for inspecting surfaces such as plates or pipe walls of magnetisable material using magnetic reluctance to gain data about the surfaces being inspected. In a preferred method, a magnetic circuit that passes through at least a magnetising unit and a portion of the surface to be inspected is created. The magnetic reluctance in the magnetic circuit is measured at one or more positions in the circuit. At least one of the measured magnetic reluctance values is incorporated into one or more algorithms. The result of the or each algorithm is recorded or displayed for each magnetic reluctance reading in association with information concerning the position of the or each magnetic reluctance reading on the surface.

Abstract: A method of assessing the integrity of a rock mass, the method including receiving a thermal assessment of the integrity of a rock mass, receiving an acoustic assessment of the integrity of a rock mass and correlating the thermal- and acoustic assessments to obtain a combined assessment of the integrity of a rock mass. The invention also covers an assessment apparatus for assessing the integrity of a rock mass, which includes acoustic assessment means operable to provide an acoustic assessment of the integrity of a rock mass, thermal assessment means operable to provide a thermal assessment of the integrity of a rock mass and correlation means for correlating the acoustic assessment of the integrity of a rock mass with the thermal assessment of the integrity of a rock mass.

Abstract: An impact detection and remediation system includes a sensing device for detecting damage events related to a structure of interest. Such damage events may include impact from a ballistic object, a tamper event, a physical impact, or other events that may affect structural integrity or cause failure. Illustratively, the sensing device is in communication with a measurement system to determine impact criteria, and a processing system which is configured to use the impact criteria to determine a direction of the initiation point of a ballistic causing the damage event.

Abstract: A damage detection and remediation system includes a sensing device for detecting damage events related to a structure of interest. Such damage events may include impact from a ballistic object, a tamper event, a physical impact, or other events that may affect structural integrity or cause failure. Illustratively, the sensing device is in communication with a measurement system to determine damage criteria, and a processing system which is configured to use the damage criteria to determine, for example, a direction of the initiation point of a ballistic causing the damage event.

Abstract: Disclosed is an eddy current flaw detection probe that is capable of pressing itself against an inspection target whose curvature varies. A flaw sensor is configured by fastening a plurality of coils to a flexible substrate that faces the surface of the inspection target. A first elastic body is positioned opposite the inspection target for the flaw sensor, is obtained by stacking two or more elastic plates, and has an elastic coefficient that varies in a longitudinal direction. A second elastic body is a porous body positioned between the flexible substrate and the first elastic body. A pressure section is employed to press the first elastic body toward the inspection target.

Abstract: The system provides first and second sensor assemblies and processor that work in cooperation to detect flaws in welded tubulars. The first sensor detects and provides an indication of the weld line to the processor, which analyzes the indication and determines the approximate location of the weld line along the tubular. The processor then transmits a signal to the second sensor assembly, which is preferably mounted on an automatic positioning apparatus. In response to the signal, the automatic positioning apparatus adjusts and readjusts the position of the second sensor assembly into proximity with the weld line to search for flaws in the tubular.

Abstract: A line locator includes a signal detector to detect signals from an underground line; an error modeler that models a phase error in the signal from neighboring underground lines; and an enhanced electromagnetic field modeler that provides a location of the underground line based on the signal and a result from the error modeler.

Abstract: The invention discloses a method for electromagnetically measuring physical parameters of a pipe that includes measuring a pipe inner diameter ID and a pipe ratio of magnetic permeability to electrical conductivity ?2/?2 by means of a measuring arrangement 1 comprising a transmitter coil 2 and a receiver coil 3, both coils being coaxial to and longitudinally spaced from each other, the measuring arrangement being adapted to be positioned into the pipe CS and displaced through the pipe.

Abstract: Embodiments of the present invention provide systems, program product and methods to detect crack-like features in pipeline welds using magnetic flux leakage data and pattern recognition. A screening process, for example, does not affect or change how survey data is recorded in survey tools; only how it is analyzed after the survey data is completed. Embodiments of the present invention can be used to screen for very narrow axial anomalies in the pipeline welds, and may also be used to predict the length of such anomalies. Embodiments of the present invention also produce a listing of the anomalies based on their relative signal characteristics.

Abstract: An electromagnetic flowmeter that prevents fluctuations in the frequency of synchronized pulse signals due to momentary fluctuations of the power source voltage. The comparator of an AC synchronizing circuit that generates pulse signals synchronized to the frequency of a commercial power source is given a hysteresis function in which a first threshold value Vth1 and a second threshold value Vth2 are set up in the comparator. The comparator compares the level of divided AC signals from a dividing circuit with the first threshold value Vth1, and if the level of the divided AC signals exceeds the first threshold value Vth1, the level of the synchronized pulse signals is inverted from the “L” level to the “H” level; and if the level of the divided AC signals falls below the second threshold value Vth2, the level of the synchronized pulse signals is inverted from the “H” level to the “L” level.

Abstract: Method of determining an edge of a first anomaly in a wall of a pipeline from a first set of data elements representing measurements of the wall of the pipeline. An element of the first set comprises a first coordinate, a second coordinate, and a parameter being indicative for the presence and/or severity of the first anomaly a position along the wall indicated by the first and second coordinate. The method comprises determining a data element that is associated with a maximum in the severity of the first anomaly; evaluating a value of the parameter by comparing with a predetermined threshold; determining an initial edge data element for which the parameter has reached the threshold; determining a next edge data element; determining further edge data elements; and determining the edge of the first anomaly by combining the first and second coordinates of the determined edge data elements.

Abstract: A defect detection device for a turbine rotor blade, wherein a turbine rotor blade implanting portion is constructed by fitting a set of rotor grooves formed on a rotor disc portion with a set of blade grooves formed on each root portion of turbine rotor blades arranged around the outer circumference of a turbine rotor rotatably installed in a turbine casing; a recess is provided in the side surface of a web provided to the inner circumferential side of a stationary blade diaphragm where stationary blades are annularly arranged adjacent to the turbine rotor blades; an eddy current probe for inspecting the state of the turbine rotor blade implanting portion is movably installed in the recess; a rod provided with a signal line for transmitting a signal detected by the eddy current probe, connected to the eddy current prove, is set up to be movable through a hole in a turbine casing and an air gap formed in the stationary blade diaphragm; the eddy current probe connected to the rod is moved toward or away from t

Abstract: A detection device for detecting cracks in compressor blades, having non-contacting sensors distributed in several planes and disposed in the vicinity of the rotor detects cycle times of blades at the sensors and/or relative and absolute changes in a gap width between a blade and the compressor housing. The captured data are compared to corresponding reference data in a memory device and analyzed.

Abstract: Variations in the lift-off separation between a probe and the surface of a structure to be tested often mask the detection of defects in the structure. A method and apparatus for automatically classifying and compensating for variations in the lift-off is described. A reference signal at a known lift-off may be weighted by a corresponding calculated ratio parameter and subtracted from a test signal to compensate for lift-off. A number of reference signals are preferably obtained and the largest magnitude gradient for each reference signal is preferably determined. The largest magnitude gradient for subsequent test signals is also obtained and the corresponding reference signal with the closest largest magnitude gradient to the test signal is identified and the corresponding reference signal is selected in the related compensation procedure. Such a method has been found to restore the signal such that lift-off is removed and defects are easily identified.

Abstract: A data analysis program operable for displaying at least one representation of a buried pipeline in a geographical area and associated on-pipe current values at various locations along the pipeline. The data analysis program is storable in a memory device and executable by a processor to generate a display on a display device. The data analysis program includes instructions for displaying a digital map representing at least a portion of the buried pipeline extending across the geographical area being surveyed. The program further includes instructions for displaying a current plot of current values associated with the various locations in the geographical area, and instructions for displaying a table having a plurality of fields including the leakage current values and associated geographical coordinates where the current values were measured in the geographical area being surveyed.

Abstract: Apparatus for non-destructive inspection of structural elements or workpieces, in particular those having an airfoil configuration, that moves a scanning sensor across the width (span) of a structural element or workpiece for the purpose of detecting structural damage. In one embodiment, the apparatus simultaneously traverses the length (chord) of the structural element or workpiece. In another embodiment, the apparatus includes a guide rail that encompasses the structural element or workpiece and the scanning sensor travels along the guide rail from a first location at an upper rear region, to the front, of the structural element or workpiece, and then around the leading edge toward the lower rear region. The apparatus includes a processor and a display device to display the processed, sensed, information.

Abstract: Embodiments of the present invention provide systems, program product and methods to detect crack-like features in pipeline welds using magnetic flux leakage data and pattern recognition. A screening process, for example, does not affect or change how survey data is recorded in survey tools; only how it is analyzed after the survey data is completed. Embodiments of the present invention can be used to screen for very narrow axial anomalies in the pipeline welds, and may also be used to predict the length of such anomalies. Embodiments of the present invention also produce a listing of the anomalies based on their relative signal characteristics.

Abstract: A fault detector for detecting valve movement of a valve in a fuel injector of an engine system, the valve includes an electromagnetic actuator arranged to move the valve between first and second valve positions, the engine system includes a sensor for sensing a current through the actuator. The detector includes a controller arranged to control the sensor; receive sensor data related to the current through the actuator; analyze the received data for current discontinuities; and output a valve movement signal dependent upon the current discontinuities. The controller is arranged to sense current during a finite sampling window, move the sampling window from a first window position to a later window position for one or more subsequent injection events; determine a new sampling window position on based a valve movement signal output the two preceding windows; and feedback the new sampling window position for a subsequent injection event.

Abstract: Embodiments of the present invention provide systems, program product and methods to detect crack-like features in pipeline welds using magnetic flux leakage data and pattern recognition. A screening process, for example, does not affect or change how survey data is recorded in survey tools; only how it is analyzed after the survey data is completed. Embodiments of the present invention can be used to screen for very narrow axial anomalies in the pipeline welds, and may also be used to predict the length of such anomalies. Embodiments of the present invention also produce a listing of the anomalies based on their relative signal characteristics.

Abstract: A method is disclosed for determining earth vertical electrical anisotropy from offshore electromagnetic survey measurements. The method requires both online and offline data, which includes at least one electromagnetic field component sensitive at least predominantly to vertical resistivity and another component sensitive at least predominantly to horizontal resistivity. Using a horizontal electric dipole source, online EZ and offline HZ measurements are preferred. For a horizontal magnetic dipole source, online HZ and offline EZ data are preferred. magnetotelluric data may be substituted for controlled source data sensitive to horizontal resistivity. Maxwell's equations are solved by forward modeling or by inversion, using resistivity models of the subsurface that are either isotropic or anisotropic.

Abstract: A method for testing a component using an eddy current array probe is provided. The method includes calibrating the eddy current array probe, collecting data from the eddy current array probe for analysis, and processing the collected data to at least one of compensate for response variations due to a detected orientation of a detected imperfection and to facilitate minimizing noise.

Abstract: An inspection system comprises a sensor configured to acquire inspection data of the object, a motion control device, a joint assembly coupled to the motion control device, and a probe housing coupled to the joint assembly and configured to hold the sensor. The inspection system further comprises a compliant element coupled to the probe housing and configured to cooperate with the joint assembly and the motion control device to position the sensor relative to the object. A self-aligning probe assembly is also presented.

Abstract: Method for removing air wave noise from shallow water controlled source electromagnetic survey data, using only the measured data and conductivity values for sea water (140) and air. The method is a calculation performed numerically on CSEM data and resulting in an estimate of those data that would have been acquired had the water layer extended infinitely upward from the seafloor. No properties of the sub-sea sediments are used. Synthetic electromagnetic field data are generated for (a) an all water model (141) and (b) an air-water model (146-147) of the survey region. These simulated results are then used to calculate (148-150) electromagnetic field values corresponding to a water-sediment model with water replacing the air half space, which represent measured data adjusted to remove air wave noise.

Abstract: A method for nondestructive testing of the pipes for detecting surface flaws using magnetic leakage flux is disclosed. With of the method, flaws can be detected and analyzed in near-real-time while the pipe is produced. The data obtained with inductive coils, Hall sensors or GMR sensors are digitized, the digital data are buffered in a first memory, and a subset of the digital data are copied into a second memory. The copied data are transformed with a wavelet transformation and the resulting wavelet coefficients are filtered and/or modified. In an alternative embodiment, the digital data can be continuously supplied to a routine for wavelet transformation, which is performed using cascaded digital signal processing routines. The evaluated variable is compared with a reference value, wherein a determined flaw-based signal can be unambiguously associated with the position of the flaw.

Abstract: A time-of-flight PET nuclear imaging device (A) includes radiation detectors (20, 22, 24), electronic circuits (26, 28, 30, 32) for processing output signals from each of detectors (20), a coincidence detector (34), a time-of-flight calculator (38) and image processing circuitry (40). A calibration system (48) includes an energy source (50, 150) which generates an electrical or optical calibration pulse. The electrical calibration pulse is applied at an input to the electronics at an output of the detector and the optical calibration pulse is applied to a preselected point adjacent a face of each optical sensor (20) of the detectors. A calibration processor (52) measures the time differences between the generation of the calibration pulse and the receipt of a trigger signal from the electronic circuitry by the coincidence detector (34) and adjusts adjustable delay circuits (44, 46) to minimize these time differences.

Abstract: Systems and methods are provided for upgrading a software artifact having accumulated data flaws. The software artifact may be accessible, for example, by a plurality of software components for backend services. Issues that cause the data flaws and corresponding fixes are tracked and evaluated to determine dependencies, if any, between the fixes. The fixes are applied to the software artifact as individual transactions. If there are no dependencies among a subset of fixes, the fixes in the subset are applied regardless of whether the other fixes in the subset were successfully applied. For subsets having dependencies between fixes, the fixes that depend from a prior unsuccessfully applied fix are discarded. The software artifact is rolled back to remove unsuccessfully applied fixes.

Abstract: A system for inspecting a pipeline having at least two transducers divided into segments, the segments each containing a number of sensors, wherein a maximum number of segments is equal to a number of transducers, an arrangement configured to send, receive and store signals, wherein the arrangement has a number of pulser channels and a number of receiver channels, wherein the arrangement has at least one multiplexing arrangement for multiplexing signals from the arrangement; and a time delay arrangement connected to the arrangement configured to send, receive and store signals. The system may also provide for focal point skewing, near real time coating compensation for proper excitation mode, adjusted time delay capability and the ability to focus beyond changes in geometry.

Abstract: A condition-monitoring device of the invention, which is provided in an electromagnetic actuator including a stationary core, a moving core, magnet coils; and a permanent magnet, monitors condition of the electromagnetic actuator. The condition-monitoring device includes a current measurement means for measuring a current flowing through the magnet coils; magnetic-flux measurement means for measuring magnetic flux inside the stationary core; a calculation means for generating a calculated waveform by performing a calculation using a current waveform representing a time variation of an output signal from the current measurement means and a magnetic-flux waveform representing a time variation of an output signal from the magnetic-flux measurement means; and a condition determination means, by finding a distinctive point on the calculated waveform, for determining conditions of the electromagnetic actuator based on information on the distinctive point.

Abstract: An eddy current acquisition system integrates traditional elements of a nuclear steam generator tubing inspection into a single modular system comprising three subsystems: the take-up reel subsystem, the acquisition instrument, which is located in the hub of the take-up reel, and the pusher head subsystem. All of the control electronics are respectively enclosed in bases of the pusher head and the take-up reel subsystems in water-resistant and dust proof enclosures. Simplified setup is achieved by employing a single communication bus linking an identification (“ID”) chip in each component to a host computer. The ID chip stores and reports product part numbers, descriptions and serial numbers and revision or upgrade status and may also store statistical information such as device duty cycles, performance statistics, repair history, and the like.

Abstract: The invention relates to a method and inspection system for non-destructive inspection of a colony of stress corrosion cracks in a pipe or a vessel. The method comprises mapping the colony of stress corrosion cracks, identifying at least one individual crack to be sized within the colony, and sizing the at least one individual crack to be sized.

Abstract: The present invention assesses memory (DIMM) strength by calculating frequency content of a radiated field which is collected by an apparatus, such as a dipole antenna. Radiated field is created by accelerated charge, which is a function of the slew rate or DIMM strength. Radiated power is directly proportional to the frequency at which bits are driven. By separating the radiated field from the near field or stored field, the DIMM strength content is isolated from other functional DIMM issues, such as tRCD latency, refresh cycles, addressing mode, etc. By examining the radiated power, the disadvantages of the prior art, such as by probing the DIMM's contacts, are avoided.

Abstract: A method of synthesizing nondestructive examination data of a component that combines data sets acquired at least two different frequencies. At least one of the data sets is interpolated or extrapolated to the equivalent of data acquired at one of the other frequencies employing a third, reference set of eddy current inspection data that is acquired at each of the inspection frequencies being combined.

Abstract: Methods, systems, and computer readable media for wireless crack detection and monitoring are disclosed. According to one system, a crack detector is affixed to a surface of a material for detecting a crack in the material. In response to detecting a crack, a crack indicator is generated, indicating the existence of the crack. A mote wirelessly communicates the crack indicator to an external device. The mote may also store multiple crack indicators in local memory before being downloaded to the external device. In other embodiments, the mote may time-stamp the crack indicator for indicating a time when the crack was detected. Additionally, the mote may associate other information with the crack indicator such as temperature and acceleration information.