A system, a method and a computer program product are provided for local perturbation immunity in a vector-based sensing device. Measurement data from at least one vector-based sensing device is evaluated at a given time using a heuristic to identify an occurrence of a perturbing event, wherein the at least one vector-based sensing device includes either a magnetometer or an accelerometer, or both the magnetometer and the accelerometer. A time-shifting component is provided to reject the perturbing event for a duration of the perturbing event and use measurement data from a gyroscope to construct vector-based sensing device measurement data unaffected by the perturbing event.

Apparatuses, methods and systems apparatus for automatically updating hard iron and soft iron coefficients of a magnetic sensor of a device are disclosed. One method includes making measurements of a magnetic field by the magnetic sensor during rotations of the device, determining by at least a criterion whether to input the measurements of the magnetic field into a coefficient estimator, calculating, by the coefficient estimator, new hard iron and soft iron coefficients upon receiving the measurements of the magnetic field, determining a quality of the newly calculated hard iron and soft iron calculated coefficients, and updating existing hard iron and soft iron coefficients to the newly calculated hard iron and soft iron coefficients only if the quality of the newly calculated hard iron and soft iron coefficients.

Methods and apparatus for characterizing composite materials for manufacturing quality assurance (QA), periodic inspection during the useful life, or for forensic analysis/material testing. System are provided that relate eddy-current sensor responses to the fiber layup of a composite structure, the presence of impact damage on a composite structure with or without a metal liner, volumetric stress within the composite, fiber tow density, and other NDE inspection requirements. Also provided are systems that determine electromagnetic material properties and material dimensions of composite materials from capacitive sensor inspection measurements. These properties are related to the presence of buried defects in non-conductive composite materials, moisture ingress, aging of the material due to service or environmental/thermal exposure, or changes in manufacturing quality.

A magnetic field sensor includes a die and a current generator in the die. The current generator generates a driving current. A Lorentz force transducer is also formed in the die and coupled to the current generator to obtain measurements of a magnetic field based upon the Lorentz force. The magnetic field has a resonance frequency and the current generator drives the Lorentz force sensor with the driving current having a non-zero frequency different from the resonance frequency.

A system and method for acquiring a calibrated eddy-current field model in magnetic resonance imaging (MRI) are provided. The method may include one or more of the following operations. An eddy-current field model may be obtained. The eddy-current field model may transformed by Laplace Transformation. Data of an eddy-current field may be obtained. The data of the eddy-current field may be processed. A calibrated eddy-current field model may be acquired. In addition, the calibrated eddy-current field model may be used to compensate an eddy-current field.

A method for determining the elapsed time after discharge of a firearm is disclosed. The method utilizes the change in induced magnetization of a firearm to obtain a value for initial magnetization after discharge of the firearm. This value can then be compared with a magnetic base calibration obtainable through further testing of the magnetization over a period of time. By comparison between the initial magnetization and the base calibration, the time of discharge of the firearm can be estimated. The invention also includes apparatus for use in measuring the magnetization of a firearm, and a kit for implementation of the disclosed method.

A magnetic-field sensor, including: a die, a current generator in the die. The current generator generating a driving current. A Lorentz force transducer also in the die and being configured to obtain measurements of magnetic field based upon the Lorentz force is coupled to the current generator. The transducer having a resonance frequency. The current generator is such that the driving current has a non-zero frequency different from the resonance frequency.

A system for generating medical image scanner configurations includes a scanner configuration database and a simulation component. The database stores a scanner configuration dataset corresponding to a medical image scanner. The simulation component includes a display module which is configured to present a graphical user interface (GUI) utilized by the medical image scanner, and an editing module which is configured to create a modified scanner configuration dataset based on commands received from a user via the GUI. Additionally, the simulation component includes a simulation module which is configured to (i) perform a simulation of the medical image scanner using the modified scanner configuration dataset to yield simulated results, (ii) use the display module to present the simulated results in the GUI, and (iii) in response to receiving user approval of the simulated results via the GUI, save the modified scanner configuration dataset to the database.

A magnetic body simulation device includes a memory; and a processor coupled to the memory and the processor configured to decide a search section for searching a rotational coefficient of each magnetization vector in a plurality of elements included in a magnetic body, in a process of calculating the each rotational coefficient in a state in which magnetic energy of the magnetic body is minimized, to determine whether or not a first condition is satisfied in which a width of the decided search section is less than or equal to a certain length, and a first rotational coefficient decided by a predetermined method is included in the search section, and to calculate, when the first condition is satisfied, a static magnetic field vector corresponding to the first rotational coefficient by linear interpolation based on static magnetic field vectors at both ends of the search section.

A distribution analysis device analyzes a distribution of a field having a property satisfying the Laplace equation, and includes: an obtainment unit that obtains measurement data indicating the distribution of the field measured through a sensor sensing area, the sensor sensing area being an area that moves in a measurement area where the distribution of the field is measured and being an area in which the field is sensed as an aggregate; and a calculation unit that calculates analysis data indicating the distribution of the field with a higher resolution than the measurement data, using an arithmetic expression that is obtained by deriving a solution of the Laplace equation using a boundary condition that an integral of the solution of the Laplace equation in a finite interval corresponding to a size of the sensor sensing area matches the measurement data.