7results about "Stray field compensation" patented technology

The application discloses an aviation magnetic interference suppression method, device and equipment based on double-machine multi-magnetic sensors, wherein two magnetic sensors are arranged on two magnetic exploration airplanes respectively, the two magnetic exploration airplanes are located at the same height, and the height difference between any one of the magnetic exploration airplanes and a position of a detection target is h; the two magnetic exploration airplanes are apart from each other by L; the detection distances of the two magnetic exploration airplanes are both R; it can be guaranteed that the two magnetic exploration airplanes cannot measure the target signal at the same time, so that only one of the common-mode magnetic signals of the magnetic exploration airplanes contains the target signal and the diurnal magnetic interference signal, and the common-mode signal of the other magnetic exploration airplane contains only the diurnal magnetic interference signal; the target signal after the diurnal magnetic interference signal is removed can be obtained by subtracting the common-mode signals of the two magnetic exploration airplanes; and the diurnal magnetic interference signal can be better suppressed through the method, so that the accuracy of the target signal is improved.

The invention refers to a kit for generating a predetermined magnetic field distribution in a predetermined volume in relation to a device, comprising: a plurality of sensor-source units configured to be placed around the device, wherein each sensor-source unit includes a magnetic field generating element for generating a respective magnetic field in the volume, the respective magnetic field being configured to contribute to the predetermined magnetic field distribution generated by the kit, a magnetic field sensing element for sensing the magnetic field at a surface of the volume, and a bracket to which the magnetic field generating element and the magnetic field sensing element are fixedly attached.

The application provides a kind of underwater system magnetic field test environment magnetic interference automatic compensation system, the system includes underwater multi-parameter measurement module, space-time decoupling separation module and hierarchical adaptive compensation module;The underwater multi-parameter measurement module is used for synchronous acquisition underwater multi-dimensional physical parameters;The space-time decoupling separation module is used for the magnetic field disturbance generated by each interference source in test environment is decoupled and separated and the disturbance model of each interference source is established;The hierarchical adaptive compensation module is used for hierarchical compensation based on each interference source disturbance model, and outputs the high-precision measurement result of underwater system magnetic field;The application realizes the high-precision, stable measurement of underwater system target magnetic field under complex, dynamic test environment.

The invention relates to a device for carrying out a work operation, in particular a welding device, comprising: at least one actuator that performs the work operation; a magnetic field source attached to the actuator; at least one magnetic field sensor for detecting the position of the actuator, wherein the magnetic field sensor is configured to detect a first magnetic field strength in a first direction and a second magnetic field strength in a second direction perpendicular to the first direction;and a control and evaluation unit connected to the magnetic field sensor and configured to identify, based on a comparison metric relating the detected first magnetic field strength to the detected second magnetic field strength, whether the magnetic field detected by the magnetic field sensor is a magnetic field substantially generated by the magnetic field source, and, if this is the case, to determine the position of the actuator based on the detected first magnetic field strength and / or the detected second magnetic field strength, and to issue a control instruction based on the determined position of the actuator.

In an apparatus for zeroing a magnetic field in a zeroing region in an external surrounding magnetic field, a plurality of separate magnetic field generating elements 102 are arranged at respective separate locations surrounding the zeroing region to generate respective zeroing magnetic fields extending into the zeroing region. A plurality of magnetic field sensing elements 103 are arranged at respective separate locations within the zeroing region to sense respective values ​​of the magnetic field in the zeroing region. A feedback control unit 150 controls the value of the respective zeroing magnetic field generated by each of the plurality of magnetic field generating elements by driving the magnetic field generating elements with respective currents that reduce the value of the magnetic field detected by each magnetic field sensing element to a value not exceeding a preset threshold corresponding to a preset zeroing of the magnetic field in the zeroing region in response to the value of the magnetic field sensed by the plurality of magnetic field sensing elements.

A system of diagnosing internal characteristics of a device includes a magnetic shield, a solenoid positioned within the magnetic shield, and one or more sensors positioned within the magnetic shield and outside the solenoid. The device is removably positioned within the solenoid and induced magnetic fields are received by the one or more sensors.