142 results about "Magnetic parameter" patented technology

Chargers which can be connected to batteries with different charging requirements and which have an identification device for identification of the different batteries are disclosed. With these chargers, the different types of batteries are recognized by a magnetic identification device. In a first exemplary embodiment, the identification device comprises at least one magnetic sensor, which is arranged in or on the charger and detects at least one magnetic parameter of a magnetic element, which is mounted in or on the battery. In a second exemplary embodiment, the identification device has at least one magnetic element and at least one magnetic sensor for detection of at least one magnetic parameter of the at least one magnetic element. The battery comprises a shielding and/or amplifying device, which alter(s) the at least one magnetic parameter of the at least one magnetic element.

The present invention, in various embodiments, is directed to a geophysical system and method in which a transmitter coil is oriented with its axis horizontally, and a sensor is positioned below the coil to measure an ambient electrical and/or magnetic parameter associated with a conductive medium surrounding the at least one transmitter coil.

The invention provides a magnetic target tracking method based on a magnetic anomaly gradient. Through carrying out matrix transformation on the magnetic anomaly gradient, a unit direction vector of a target magnetic moment is separated, an optimization problem is formulated to estimate the position and magnetic parameters of the target, and through constructing a special fitness function, a particle swarm optimization algorithm is used to solve the target parameters. According to the target tracking method based on the magnetic anomaly gradient, a new idea is provided for target positioning by using geomagnetic total field information, the method can solve the information of moving target velocity, and certain reference meaning is realized in positioning and tracking of the magnetic target.

The invention discloses a correction method of an electronic compass in an underwater vehicle, which comprises the following steps of: inquiring magnetic declination, and carrying out corrected navigation on the water surface of the vehicle; recording navigation data by a navigation sensor; exporting correction navigation data from a communication module; searching a hard magnetic interference parameter, solving the error surface plot between a correction track and a reference track under the condition of (2N+1)<2> disperse hard magnetic interference parameters, wherein the minimum point corresponding to the surface plot is the search result; according to the set correction precision requirement, repeating and reducing the search range and grid, and re-searching to obtain a more precise hard magnetic interference parameter evaluation value; and finally, applying the searched magnetic parameter evaluation value in the navigation of the underwater vehicle. The method disclosed by the invention has the advantages that the operation is simple, the influence of the outer magnetic interference to the electronic compass in the underwater vehicle can be effectively eliminated and thus, the corrected electronic compass can return back to the corrected attitude angle.

The embodiments of the invention disclose a method and a device for entering a shooting status and an intelligent terminal. The method for entering the shooting status comprises a step of obtaining correlation initial magnetic parameters of a Hall sensor; and a step of obtaining correlation magnetic parameters of the Hall sensor produced by rotations of a camera in a non-shooting status, confirming that the correlation magnetic parameters correspondingly change and opening the camera to enter the shooting status. The camera is opened to enter the shooting status through the camera rotations according to the status of the current intelligent terminal and the correlation magnetic parameters of the Hall sensor produced by rotations of the camera, so that users can conveniently operate.

The present invention relates to a printed circuit board with low noise. A voltage source layer and a ground layer of the printed circuit board are divided into an analog reason and a digital area respectively via an isolation line, and adapted to conduct voltage source signal and ground signal respectively. Because the isolation line is an open pattern and a capacitor adapts to position near the opening, the noise and the electro-magnetic parameter of the printed circuit board are reduced.

The invention discloses a spectrum magneto-optical ellipsometry analysis device of a rotary compensator as well as application thereof. The spectrum magneto-optical ellipsometry analysis device comprises a light source module, a light path module, a magnetic field module, a sample table, a motor control module and a detection and analysis module, the light path module comprises a collimating lens,a polarizer, a compensator and a polarization analyzer, the detection and analysis module comprises a computer and a detector, the collimating lens, the polarizer, the compensator, the sample table,the polarization analyzer and the detector are sequentially arranged along a light path direction, the polarizer and the compensator are located in an incidence light path, the polarization analyzer is located in an emergence light path, and the incidence light path and the emergence light path are located at the two sides of the sample table and respectively keep an included angle Phi with normalof the sample table. The device disclosed by the invention can represent optical and magnetic parameters of a magnetic film material under longitudinal or poloidal magneto-optical Kerr effect, can obtain thickness, optical parameters and magnetic parameters of a magnetic film sample during one test and is relatively high in automation degree.

The invention discloses a Barkhausen noise lossless measuring method and system for a ferromagnetic material local stress and strain field. A hard disc magnetic head is used for detecting a Barkhausennoise signal in a cyclic magnetization process of a ferromagnetic material, multiple extracted magnetic parameters are input to a pre-established force-magnetic parameter mapping relation neural network model, and a size of the stress or the strain is quantitatively forecasted. The hard disc magnetic head of which a magnetic core terminal air gap is smaller than 1 um is carried by a three-axis moving platform and used for scanning along a local area range of the measured material. A Barkhausen noise detecting device is capable of synchronously detecting the Barkhausen noise signal. The neuralnetwork model is capable of forecasting the size of the stress or the strain of a scanning point, and acquiring the stress field or the strain field within the local area range of the material afterscanning. So a relation of the Barkhausen noise signal in the ferromagnetic material and the stress and strain is calibrated, and rapid and lossless quantitative detection is performed on the local stress and strain field.

The invention relates to a joint inversion method of gravity and magnetic data based on correlation constraints of a sinusoidal function. A method using the square of a density parameter and the square of a magnetic parameter to replace the density parameter and the magnetic parameter is put forward. The sinusoidal function is related to the cross-multiplication of two parameter vectors and the expression and the derivative become simple and visual, so that the stability of the joint inversion is improved effectively. Compared with the prior art, the method has the following advantages: the correlation constraint of the sinusoidal function is applied to the joint inversion method of the gravity and magnetic data and the occurrence of the singularity is avoided effectively when the conjugate gradient algorithm is used for solving the optimal solution of the objective function, so that the joint inversion stability is improved. When the new correlation constraint condition is calculated,the method using the square of a density parameter and the square of a magnetic parameter to replace the density parameter and the magnetic parameter is employed and thus the method is also suitablefor the condition of local correlation but global un-correlation caused by non-same-number changing of the density parameter and the magnetic parameter of the global geologic body, so that the methodhas a wide application range.

In a method and apparatus for magnetic resonance (MR) imaging, a result image is provided based on multiple MR contrasts. The result image is indicative of a value of a magnetic parameter. MR data are acquired for the multiple contrasts at different time points, in each case following preparation of a magnetization. During the acquisition of the MR data, k-space is undersampled according to a respective undersampling scheme. The undersampling schemes of the different MR contrasts are different from one another.

Embodiments of the invention provide a method and a device for measuring the complex magnetic permeability of a sheet material. The method comprises the following steps: a first air region, a to-be-measured sample placing area and a second air area are sequentially arranged in a dielectric layer between a grounding plate of a microstrip line and a conduction band, and the to-be-measured sample placing area is filled with a to-be-measured thin film material; and characteristic impedance and propagation constants of two ports of the microstrip line are obtained on the basis of a transmission reflection method, relative dielectric constants of the two ports of the microstrip line are obtained on the basis of relations between electromagnetic parameters of the material and the characteristic impedance and between the electromagnetic parameters of the material and the propagation constants, and the complex magnetic conductivity of the to-be-measured thin film material is obtained on the basis of the relative dielectric constants. Based on the measurement of an S parameter after a sample is added in a broadband test process, the characteristic impedance of the microstrip line filled withthe to-be-measured thin film material is calculated by utilizing the transmission reflection method; the relative dielectric constants of the two ports of the microstrip line are calculated accordingto the relations between the electromagnetic parameters and the characteristic impedance; and then the complex magnetic conductivity in a test frequency band range is calculated. The method and the device have the characteristics of wide test frequency band, high repeatability, simple structure and the like.

A detector unit apparatus and method for operating and producing a detector unit to be adapted to varying environmental influences or to its own, in particular mechanical, electrical or magnetic parameters of the detector unit, which are dependent on measuring lengths. An inventive positional sensor operating according to the running time principle of a mechanically elastic shaft and comprising a waveguide, a positional element, e.g. a positional magnet, which can be displaced in particular along the waveguide, in addition to a detector assembly that is located on the waveguide and comprises a detector coil wherein the detector assembly has a current source so that a current can flow through the detector coil.

The invention discloses BaTiO3/Co3O4 oxide complex-phase millimeter wave absorbing powder having multi-stage microstructure distribution and a preparation method. The complex-phase millimeter wave absorbing powder having multi-stage microstructure distribution is obtained by firstly preparing precursor powder through a sol-gel method, performing ball milling, then executing the multi-step regulation and control heat treatment process including decomposition, control nucleation, dense growth and the like in a high temperature furnace to obtain a complex-phase sintering sample and finally controlling ball milling. The electric and magnetic parameter resonance phenomena of the BaTiO3/Co3O4 oxide complex-phase millimeter wave absorbing powder under the millimeter wave characteristic frequencybands are successively achieved, the frequency of their wave absorbing frequency bands is 35GHz in a typical millimeter wave window, the frequency band width can be up to 5 GHz, an RL value reaches -40 dB. The preparation method of the complex-phase millimeter wave absorbing powder is simple in preparation process and low in cost, and can be widely used in the fields of millimeter wave electromagnetic shielding and invisibility.

The invention relates to a gravel pack filling monitoring system and method. The gravel pack filling monitoring system comprises a magnetic particle container, a gravel pack container, a gravel pack mixer, a sand-carrying fluid container, a sand mixing truck, a high-pressure pumping set, a data acquisition and processing center, a ground magnetometer, a magnetic particle conveying pipeline, a gravel pack conveying pipeline, a evenly-mixing gravel pack conveying pipeline, a sand-carrying fluid conveying pipeline, a first sand-mixing fluid conveying pipeline, a second sand-mixing fluid conveying pipeline and a ground magnetometer and data acquisition and processing center communication pipeline, wherein the ground magnetometer monitors magnetic parameter changing from the ground, the data acquisition and processing center is connected with the data acquisition and processing center communication pipeline through the ground magnetometer, and the data acquisition and processing center collects and stores the measured information of the ground magnetometer and calculates and displays the gravel pack distribution state. The gravel pack filling monitoring system can track the transporting and distributing state of gravel pack in a sand-prevention well section from the ground, the well and/or an adjacent well during gravel pack filling and can achieve repeated detection on gravel pack distribution after production of the sand-prevention well.

The invention relates to a magnetic coin high-speed identification device, wherein the identification of the authenticity of coins comprises the following steps of: scanning magnetic parameters of the surface of a sample to be detected to acquire fluctuation signals of the magnetic parameters of the surface of the sample to be detected, and comparing the acquired fluctuation signals with the preset fluctuation signals of real coins to identify the authenticity of the sample. The device of the invention is provided with a coin centrifugally driving system, a control system, a coin surface magnetic signal acquiring system, a data analyzing system and a false coin eliminating system, wherein the coin centrifugally driving system sequences coins in a special coin channel and enables the coins to pass through the special coin channel at high speed; the control system controls coordinated actions of each system and human-computer interfaces; the coin surface magnetic signal acquiring system scans magnetic signal fluctuation of coin surfaces when the coins pass through the system; when the coins pass through a sensor at high speed, the magnetic sensor acquires three groups of fluctuation signals and converts the signals into digital signals, and the data analyzing system compares the scanning signals with the digital signals for analyzing; and the false coin eliminating system strikes false coins by using an electromagnetic valve according to control system signals, thereby eliminating the false coins.

A method for monitoring a building structure, having construction and reinforcement elements with pre-calculated threshold stretching and compression loads, comprises—determining actual stretching and compression loads developed therein based on data measured for the loads, —comparing the determined loads with the corresponding pre-calculated loads, and —displaying the determined loads and the compared results on a monitoring terminal, wherein the measured data are generated in real time or in a predetermined time mode, and obtained by measuring deviations of electric or magnetic parameters at the reinforcement elements, and by compression-measuring sensors installed between the construction elements. A system for determination of failure conditions of the building structure includes a monitoring device capable of connecting to stretching and compression loads measuring means. The device includes a terminal associated with the measuring means, capable of processing the loads data in real time or within a pre-set time interval, and displaying the data.

The invention discloses an experimental method of using a digital storage oscilloscope to observe an alternating current magnetic hysteresis loop, and belongs to the technical field of electromagnetic testing. The experimental method aims to reducing the distortion of testing the alternating current magnetic hysteresis loop, and improve the precision of testing dynamic magnetic parameters. According to the experimental method, firstly an alternating current triangular wave constant flow source circuit is designed, a magnet exciting coil is arranged as the load of the alternating current triangular wave constant flow source circuit, and the weave shape of magnetic field intensity H is enabled to be a triangular wave. The negative feedback sample resistance R1 of the alternating current triangular wave constant flow source circuit is the sample resistance of an exciting current, and the terminal voltage VH of the alternating current triangular wave constant flow source circuit is transmitted to the input end X of an oscilloscope. A test coil outputs voltage e2, and VB is obtained through the integration of an electronic integrator and is transmitted to the input end Y of the oscilloscope. The oscilloscope displays the alternating current magnetic hysteresis loop through XY scanning. In a measurement process, the rate of the change of H is enabled to be unchanged, the change rule of B is observed under the condition that H evenly changes, and the tested magnetic hysteresis loop is enabled be capable of reflecting the function relationship between the numerical values of B and H inside a sample better. The e2 replaces the VB to be sent to the input end Y of the oscilloscope, and a differential permeability mu d-H curve can be directly displayed.

The present invention discloses a magnetic Barkhausen and magnetic parameter sensor and a measurement method of a magnetic Barkhausen and magnetic parameter. The sensor comprises: a signal transmission interface electrically connected with an excitation coil and a signal receiving assembly and configured to transmit excitation signals to the excitation coil for receiving signals returned by the signal receiving assembly; the excitation coil encircled at one end of a magnet yoke and configured to trigger a magnetic parameter measurement assembly; the induction coil, in the magnetic parameter measurement assembly, encircled at the other end of the magnet yoke and configured to return a first feedback signal according to the excitation signals; and a Barkhausen signal measurement assembly connected with a housing and configured to return a second feedback signal according to the excitation signals. The problems are solved that the detection efficiency is reduced and the material state of metal materials cannot be comprehensively evaluated due to the lack of a technology capable of measuring a Barkhausen noise and magnetism parameters of the metal structure materials at the same time in the same detection device in the correlation technology.