A hybrid inertial measurement unit (IMU) comprises: a low frequency (LF) sensor providing a first signal containing information for a first parameter of the hybrid IMU; a shock resistant (SR) sensor providing a second signal containing information for the first parameter, wherein the SR sensor is resistant to destabilization during a destabilizing operational period; and a processor, wherein the processor further comprises: a weighting factor computation module to compute a weight to be applied to the first signal and to compute a weight to be applied to the second signal; a LF weighting module to apply the computed weight to the first signal to create a weighted first signal; a SR weighting module to apply the computed weight to the second signal to create a weighted second signal; and a compensator to combine the weighted first signal and the weighted second signal to create a compensated signal containing information for the first parameter.

A current sensor includes an electrical-conduction member, a magnetoelectric converter, and a shield. The shield includes a first shield and a second shield each having a plate shape. The first shield and the second shield being arranged such that surfaces are opposed to and spaced away from each other. A part of the electrical-conduction member and the magnetoelectric converter are located between the surface of the first shield and the surface of the second shield. The part of the electrical-conduction member extends in an extension direction that is along the surface of the first shield. At least one of the first shield and the second shield has an anisotropy in magnetic permeability in which the magnetic permeability in a lateral direction that is along the surface of the first shield and perpendicular to the extension direction is higher than the magnetic permeability in the extension direction.

The test apparatus tests a wafer under test on which devices under test each including magnetoresistive memory or a magnetic sensor are formed. In a test process, the wafer under test is mounted on a stage. A test probe card is configured such that it can make probe contact with the wafer under test in the test process. A wafer connection HiFix is arranged between the test probe card and a test head. A magnetic field application apparatus is provided to the wafer connection HiFix. In the test process, the magnetic field application apparatus applies a magnetic field B.sub.EX to the wafer under test.

The present disclosure provides magnetic sensor system that includes a magnetic sensor package comprising a magnetic single turn sensor and a magnetic multi-turn sensor, and a shield arrangement for shielding the magnetic sensor from stray magnetic fields. The shielding arrangement comprises a ferromagnetic tube that houses one or more magnets and connects to an end of rotating shaft, such that rotation of the shaft causes a corresponding rotation of the ferromagnetic tube and magnets. The magnetic sensor package is positioned on a surface of a PCB substrate, which is positioned in close proximity to the ferromagnetic tube and magnet arrangement. A shielding device is then arranged in close proximity to the magnetic sensor package, for example, on the opposite side of the PCB substrate or directly between the PCB substrate and the ferromagnetic tube, to provide additional shielding of any stray magnetic fields. The shielding device may be in the form of a disc or a ring of ferromagnetic material that has a higher level of magnetic conductivity.

A magnetic field recording system includes a headgear for a user; optically pumped magnetometers (OPMs) disposed in or on the headgear to detect magnetic fields and, in response to the detection, produce magnetic field data; at least one sensing modality including an optical sensing modality having at least one light source and at least one camera or light detector to receive light reflected or directed from the user and to produce an optical data stream; a tracking unit to receive the optical data stream and track a position or orientation of the headgear or user; a system controller to control operation of the OPMs and receive, from the tracking unit, the position or orientation of the headgear or user; and a processor to receive the optical data stream and the magnetic field data from the OPMs and analyze the magnetic field data using the optical data stream for validation.

A magnetic measurement apparatus includes a concentrating structure and a magnetic sensor. The concentrating structure includes a band portion and a plurality of protruding portions. The band portion is configured to concentrate a magnetic flux from a subject. The plurality of protruding portions are configured to transmit the concentrated magnetic flux to a magnetic sensor. The magnetic sensor is magnetically connected between two opposing protruding portions.

A current sensor for magnetic field-based current determination of an alternating current through a current conductor is based on a magnetic field-sensitive sensor element. The sensor element is arranged spatially adjacent the current conductor to detect a magnetic field brought about by the alternating current I in the current conductor. It is proposed that at least one conductive compensation element be arranged separately from the current flow through the current conductor and spatially adjacent the sensor element and the current conductor to compensate frequency-dependent distortions of the magnetic field by means of an induction-generatable compensation magnetic field.

The devices and methods of stimulating the immune system to treat damaged and abnormal tissue using compressed static magnetic fields provides for noninvasive treatment of damages tissue and removal of abnormal tissue. At least two magnets are positioned to have their static magnetic fields compressed at the damaged or abnormal tissue and at the immediately surrounding healthy tissue. The compressed static magnetic fields stimulate the immune system in the immediately surrounding healthy tissue which treats the damaged or abnormal tissue. The treated tissue fully regenerates without additional medical intervention. The devices provide for efficient exposure to compressed magnetic fields and ease of use at different locations on a body and different types of animal species.

A magnetic detector includes a full-bridge circuit including magnetoresistive sensors on the same substrate. The magnetoresistive sensors include two magnetoresistive films and have different relationships between the fixed magnetization direction and the bias application direction. The fixed magnetization direction and the bias application direction are determined with three or more exchange coupling films including antiferromagnetic layers with different blocking temperatures. Thus, the magnetic detector has high resistance to a strong magnetic field, is easy to produce, and has a high degree of flexibility in production.

A method of diagnosing internal characteristics of a device includes applying a strong magnetic field to the device. The method can include reducing the strong magnetic field at a location of one or more sensors. At least one of the one or more sensors is proximate to the device. The method can include measuring induced magnetic fields around the device. The method can include measuring induced or intrinsic electrical current flow. The method can include measuring intrinsic magnetic properties. The induced magnetic fields can include diagnostic information on properties of the device and how the properties change over time. The device may be, for example, a battery, a capacitor, a supercapacitor, or a fuel cell. The presented measurement of magnetic susceptibility can be performed on materials, solutions, chemical substances, or tissue samples.