160 results about "Magnetic source" patented technology

According to the displacement modulation and optical assistance-based SERF atom magnetometer magnetic imaging method, an SERF atom magnetometer integrated with a magnetic flux guider is used as a magnetic sensor, and low-frequency magnetic field modulation is introduced to the magnetic sensor by controlling a to-be-tested sample to perform periodic infinitesimal displacement in the sensitive direction of the magnetic sensor; the modulation signal is demodulated by combining a phase-locked amplification technology, and a magnetic response signal subjected to phase-locked demodulation at each spatial position is extracted; constructing a magnetic response matrix through two-dimensional track scanning of micron-order step pitch; an image acquisition module and a reflection optical assembly are introduced for spatial registration so as to monitor the relative position in real time, and the visibility and controllability of the magnetic imaging process are guaranteed; the point-by-point detection of fT-level weak magnetic signals can be realized on the premise that an array structure is not needed; the low-frequency noise interference can be effectively inhibited, the stability and definition of direct-current and low-frequency magnetic field imaging are improved, and the method is suitable for high-resolution space imaging application of weak magnetic sources such as magnetic domain structures, nervous tissue slices and ancient rock samples.

The invention discloses a magnetic source positioning method based on a spin-exchange relaxation-free atom magnetometer, and aims to provide a high-precision brand-new solution for magnetic source positioning in a near-zero magnetic environment by performing physical modeling and least square estimation on space magnetic field distribution of a target magnetic source. The magnetometer is enabled to be simultaneously sensitive to a three-axis magnetic field, a light absorption detection method is utilized to ensure that complete three-axis magnetic field information is obtained, and the sensitivity of the three axes reaches fT / Hz1 / 2 (1fT = 10 <-15 > T) magnitude. In the positioning process, the target magnetic source is abstracted into a physical model of the magnetic dipole, and the space magnetic field information generated by the target magnetic source is obtained through the atom magnetometer, so that the long-term stability of the magnetic source positioning process and the high precision of the positioning result can be ensured in the zero magnetic environment; therefore, a high-precision magnetic positioning technical means with great potential is provided for various application scenes such as paleomagnetic sample testing and magnetic source positioning in medical research, and technical progress and application expansion in related fields are expected to be promoted.

The invention provides a multi-magnetic accurate positioning method based on APSO-LM fusion, and solves the technical contradictions that global search and local convergence are unbalanced and the resolving efficiency is low in the existing multi-magnetic accurate positioning technology. The method comprises the following steps: constructing a magnetic moment calibration module, selecting a sensor array calibration point, collecting magnetic field data, and calculating a precise magnetic moment amplitude based on a magnetic dipole model; an NSS-VMGT initial positioning result is input through a parameter initialization module, APSO and LM algorithm parameters are configured, and particle vectors are normalized; generating a particle swarm by using an APSO global search module, and iteratively screening a global optimal parameter as an LM initial value; calculating a residual error and a Jacobian matrix by means of an LM local refining module, and iteratively optimizing and outputting a magnetic source position and a magnetic moment; and the dynamic compensation module is used for calibrating clock skew and inhibiting environment interference. The device is realized based on STM32H743, and comprises a 7 * 7 lis2mdltr sensor array, a dual-chip data acquisition link, an APSO-LM algorithm hardware acceleration module and an upper computer interaction unit.

Methods and systems are provided for drilling a secondary wellbore relative to a target wellbore, which involve drilling the secondary wellbore with a bottomhole assembly (BHA) that extends from a drill string. The BHA includes a magnetic field detector, a steering component, a drill bit, and at least one processor. The magnetic field detector is configured to detect a time- varying magnetic field generated from a rotating magnetic source of a drilling tool disposed in the target wellbore. The at least one processor is configured to i) use data output by the magnetic field detector to continually determine distance and direction or azimuth of the magnetic source relative to the BHA while drilling, and ii) use the distance and direction or azimuth of the magnetic source relative to the BHA while drilling to adjust the steering of the drilling performed by the BHA as controlled by the steering component of the BHA. The operations of the least one processor can be configured to adjust steering of the drilling of the BHA in order to maintain a set distance and direction or azimuth relative to the target wellbore, autonomously without surface input or interference, whilst drilling with the BHA.

The invention discloses a multi-magnetic-source comb-shaped water tank magnetic liquid sealing device, and belongs to the field of mechanical engineering sealing. A first pole shoe, a second pole shoe, a third pole shoe and a fourth pole shoe which are provided with annular comb-shaped tooth grooves are alternately connected with a first permanent magnet, a second permanent magnet and a third permanent magnet in series, wherein the first permanent magnet, the second permanent magnet and the third permanent magnet are arranged in a manner that N-S-S-N-N-S magnetic sources are arranged in sequence or N-S-N-S-N-S-S-S-S-S magnetic sources are arranged in an inverted manner, and the multi-magnetic-source comb-shaped water tank sealing assembly is formed. Each pole shoe is provided with an annular cooling water tank, and spiral fins are machined on the bottom face and the side face of each cooling water tank, so that the effective heat exchange area in magnetic liquid sealing can be increased, convective heat transfer of cooling fluid is enhanced, the heat dissipation capacity is enhanced, the stable temperature of the magnetic liquid is kept, the sealing pressure resistance is improved, and the service life is prolonged. The installation mode that the multiple magnetic sources are sequentially arranged can compensate the weakening effect of the water tank on the magnetic field through magnetic field superposition, the magnetic field intensity difference value of the pole teeth is increased, and the sealing and pressure resisting capacity of the magnetic liquid is further enhanced.

The invention provides an indoor local magnetic field modeling method and device based on a magnetic source equivalence principle, and belongs to the technical field of indoor localization, and the method comprises the steps: collecting the data of a three-axis magnetometer in a space range through an array type magnetic sensor, and obtaining the original measurement information of an indoor magnetic field; based on a magnetic source equivalence principle, an indoor magnetic field is modeled into an equivalent magnetic dipole model consisting of a plurality of equivalent magnetic dipoles, and a magnetic field generated by the model is consistent with a real magnetic field in an observation area by setting magnetic moment and position parameters of the magnetic dipoles; according to the measured value of the array type magnetic sensor, an observation model is established in combination with an equivalent magnetic dipole model and used for describing the relation between the measured value and model parameters; through a nonlinear least square optimization method, parameters of the equivalent magnetic dipole model are solved according to the observation model, the equivalent magnetic dipole model of the indoor magnetic field is obtained, and the parameters comprise the magnetic moment and the position of the magnetic dipole. The precision and the reliability of the model are remarkably improved.

The invention discloses an overlying strata fracture electromagnetic imaging method and a grouting system, and particularly relates to the technical field of geological fracture imaging. The invention discloses an overlying strata fissure electromagnetic imaging method and a grouting system. The method comprises the steps that S1, magnetic source slurry containing permanent magnetic material particles is injected into a target overlying strata fissure area through the grouting system; s2, magnetizing the magnetic source slurry injected into the crack through an electromagnetic coil group arranged on the grouting system; s3, tracer slurry containing magnetic responsive nanoparticles is injected into the fissure area where the guiding magnetic field is formed through a grouting system; s4, in-hole electromagnetic detection equipment is adopted to scan the fracture area filled with the tracing slurry, and electromagnetic response data are obtained; and S5, processing and analyzing the electromagnetic response data. According to the overlying strata fissure electromagnetic imaging method and the grouting system provided by the invention, through a technical path of'pilot magnetism and post tracing ', the tracing slurry is actively guided to directionally migrate by utilizing the magnetic field, and high-precision filling and electromagnetic imaging of an overlying strata fissure network are realized.

The invention discloses a magnetic source target positioning method, which belongs to the technical field of geophysical exploration, is used for positioning a magnetic source target, and comprises the following steps: collecting and preprocessing plane grid magnetic anomaly data, constructing a simplified Euler deconvolution model under the constraint of derivative features, segmenting observation data by using a local sliding window, and resolving to generate an Euler solution point cloud. The method comprises the following steps: converting a selection problem of an equivalent scale factor into a one-dimensional global optimization problem, adaptively searching an optimal solution through a Bayesian optimization method, identifying a magnetic source high-probability solution point and a noise solution point by using a density-based spatial clustering method, introducing a density penalty term to strengthen a high-probability solution constraint, and constructing a final positioning target function. And outputting the optimal position solution of the magnetic source. According to the method, a traditional Euler deconvolution model is simplified, noise interference is effectively suppressed, the stability and robustness of the inversion process are improved, uncertainty caused by manual parameter selection is avoided, and the positioning precision is improved.

The present disclosure relates to a method (100) of magnetically calibrating a magnetometer sensing system (30) with respect to an electronic device (50), the method (100) comprising: detecting (110) a disturbing magnetic source (520) in the electronic device (50) relative to a reference coordinate system (X, Y, Z) of the magnetometer sensing system (30); identifying (120) one or more magnetometers (Sk,l) of the magnetometer sensing system (30) which are magnetically affected by the detected disturbing magnetic source (520); selecting (130) one or more balancing magnetic sources (400) to reduce a magnetic effect of the detected disturbing magnetic source (520) on the one or more identified magnetometers (Sk,l); and placing (140) the one or more selected balancing magnetic sources (400) in a fixed relation to the magnetometer sensing system (30) and / or to the disturbing magnetic source (520).

The invention relates to the technical field of anchor rod length detection, and discloses an anchor rod length detection device for shaft engineering and a detection method.The anchor rod length detection device comprises a protection frame, a sealing door is hinged to the top of the protection frame, a rubber plate is fixedly connected to the inner wall of the protection frame, an instrument host is arranged in the protection frame, and a sensor connecting line is inserted into the top of the instrument host; a sensor is inserted into the end, away from the instrument host, of the sensor connecting line, a threaded rod is rotationally connected to the end of the sensor, a super-magnetic source connecting line is inserted into the top of the instrument host, and a super-magnetic source is inserted into the end, away from the instrument host, of the super-magnetic source connecting line. The surface of the anchor rod is sleeved with the mounting cylinder, at the moment, the receiving end of the sensor makes contact with the end of the anchor rod, the output end of the super-magnetic source makes contact with the end of the anchor rod and is kept horizontal with the anchor rod, and the sensor transmits received signals to the instrument host through the sensor connecting line; therefore, the length of the anchor rod embedded into the soil layer is detected.

This application provides a displacement sensor and a magnetic levitation system. The magnetic levitation system includes a magnetic levitation bearing and a displacement sensor. The displacement sensor includes: a first magnetic source mounted on the rotor shaft of the magnetic levitation bearing, used to generate a magnetic field; a substrate fixedly disposed at a distance from the first magnetic source, with a central hole for the rotor shaft to pass through; and a Hall array including multiple Hall chips, each attached to and electrically connected to the substrate. The Hall chips are distributed around the central hole, and each Hall chip can detect the magnetic flux density at its respective location to obtain position information of the first magnetic source and the rotor shaft. Compared to traditional magnetic levitation bearings, this application uses fewer displacement sensors, thus reducing the installation space occupied by the displacement sensors. It is also suitable for applications where the rotor shaft is extended.

The invention discloses a high-inertia multi-port composite motor for new energy grid connection. The high-inertia multi-port composite motor comprises a brushless doubly-fed motor, an axial permanent magnet motor and a magnetic gear structure. The brushless doubly-fed motor comprises a radial stator and a squirrel cage rotor, a power winding and a control winding are arranged in the stator and serve as a first electric port and a second electric port respectively, the axial permanent magnet motor comprises an axial stator and an axial permanent magnet rotor, and an armature winding is arranged in the stator and serves as a third electric port. The magnetic gear structure is arranged on the inner side of the squirrel cage rotor and the outer side of the rotating shaft, a brushless doubly-fed motor rotor magnetic field is used as a modulation magnetic source, the phase and amplitude of the magnetic field are adjustable, dynamic adjustment of the transmission ratio of the magnetic gear is achieved through a control winding, and electromagnetic and mechanical dual coupling is achieved. The equivalent rotational inertia of the composite motor is obviously higher than that of a single machine, stronger inertia support and frequency stability can be provided for a power grid in a new energy grid connection process, and the composite motor is provided with three independent electric ports, realizes multi-mode operation, and is compact in structure and high in power density.

The magnetic liquid sealing device of the present application belongs to the field of mechanical engineering sealing. The device is composed of the following components: main shaft, magnetic liquid I, pole shoe ring I, shell, sealing ring I, pump I, container I, sealing ring II, electromagnet I, magnetic conducting sleeve, electromagnet II, pump II, container II, sealing ring III, pole shoe ring II, magnetic liquid II, sealing ring IV, end cover. The sealing device composed of these components is a module that can be used in stack. Two kinds of magnetic liquids are used alternately or simultaneously, which expands the applicable temperature range of the magnetic liquid sealing. The sealing device is modularized, and different types of magnetic liquids can be used in different modules to have different applicable temperature ranges. The magnetic liquid sealing can be used in a wide temperature range by connecting the modules in series. The electromagnet is used as the magnetic source, and according to different working temperatures, the state of each magnetic liquid sealing can be independently controlled through cooperation with the pump to prevent permanent failure of the magnetic liquid due to temperature problems.

The invention discloses a cargo in-vitro magnetic field calculation method based on boundary magnetic field numerical integration, which relates to the technical field of electromagnetic detection, and comprises the following steps: constructing a cargo numerical model in finite element electromagnetic field calculation software, and setting the size of the cargo numerical model; determining the position of an initial magnetic source based on the cargo numerical model, and setting the intensity of the initial magnetic source; respectively calculating magnetic field intensities at positions 2.1 m and 4.6 m away from the initial magnetic source intensity through finite element electromagnetic field calculation software to obtain spatial magnetic field data, further obtaining attenuation coefficients of transverse unit detection points of all boundary planes, obtaining an attenuation coefficient set, and performing spatial interpolation and translation processing; coupling each actually measured magnetic field data acquired by the array sensor with attenuation coefficients at corresponding positions, and respectively solving magnetic field intensities at positions 2.1 m and 4.6 m away from the surface of a measured object; high-precision and high-efficiency calculation of the external magnetic field of the cargo is realized, and the rapid and lossless requirements of air transportation safety detection are met.

This invention provides an indoor magnetic navigation verification system and its operating method. The system includes an experimental platform, an optical positioning system, and a display terminal. The experimental platform, from bottom to top, comprises a support layer, a magnetic source deployment layer, a scene support layer, and a carrier operation layer. The magnetic source deployment layer contains a magnetic source array capable of receiving magnetic source control signals sent by a host computer. The magnetic source array includes multiple magnetic sources. A mobile carrier runs on the carrier operation layer. An edge computer acquires the motion data of the mobile carrier and outputs it to the host computer, which calculates the estimated trajectory of the mobile carrier. The optical positioning system includes multiple camera devices for acquiring the actual trajectory of the mobile carrier. The display terminal acquires the actual trajectory output by the optical positioning system and compares and displays the estimated trajectory with the actual trajectory. This invention also provides the operating method of the system. This invention can construct a verification system that can be repeatedly verified.

The invention provides an intraoperative dynamic positioning system and method based on a magnetic sensor array and a composite magnetic field, and the system comprises a composite excitation handle which is internally and non-coaxially integrated with a static magnetic source and a dynamic magnetic source, and generates a non-axisymmetric static and dynamic composite magnetic field; the self-adaptive sensing array is provided with a plurality of magnetic sensing nodes and is used for synchronously acquiring magnetic field signals; and the navigation processing terminal is used for processing the signal and resolving the pose. According to the method, static magnetic and dynamic magnetic components are obtained through synchronous acquisition and frequency domain decoupling; the method comprises the following steps: fitting the position and direction of a handle by utilizing a static magnetic component, and solving a rotation angle around a shaft by taking the position and direction as initial values and combining a dynamic magnetic component to realize full six-degree-of-freedom positioning; and finally, obtaining the navigation pose of the instrument tip through filtering mapping. According to the invention, full-attitude, high-precision and strong-interference-resistance intraoperative dynamic positioning is realized, and the problems of precision degradation and visual lag of traditional electromagnetic positioning in a metal environment are solved.

A rotary machine has a stator (13) and a rotatably mounted rotor (11), wherein one or more magnetic field sensors (12) are fixedly arranged at a radial distance with respect to the stator (13) from an axis (20) fixed with respect to the stator (13), and at least one measuring device (1) is designed to detect a change in the magnetic field by means of the magnetic field sensors (12), the rotor (11) being designed to generate one or more electrical signals by means of one or more constant magnetic source voltages and one or more of the magnetic field sensors (12), respectively, which have signal components corresponding to the rotor rotation frequency (171) and the respective distance between the magnetic field sensors (12) and the rotor (11), characterized in that a demodulator unit (4) is provided, which is designed to demodulate the signals generated by the magnetic field sensors (12) or derived therefrom, so as to generate signals (140) corresponding to the distance between the rotor (11) and the magnetic field sensors (12) corresponding to the respective signals.

The invention discloses a multi-stage purification magnetic polishing sewage filtering treatment device which comprises a filtering tank, the top of the filtering tank is sleeved with a tank cover, the top of the tank cover communicates with two liquid inlet pipes, the tops of the two liquid inlet pipes communicate with a liquid inlet frame, and a filter screen is fixedly installed in the top of the liquid inlet frame; a magnetic suction overflow assembly is mounted in the filtering tank, and a grading filtering assembly is mounted in the filtering tank; magnetic force loss substances and metal scraps in sewage can be magnetically attracted through the magnetic force grid plates and the magnetic force rings, the magnetic force grid plates adopt high-magnetic-energy-product permanent magnets arranged in an array mode as magnetic sources, gaps between the grid plates are optimally designed through fluid mechanics, it is guaranteed that the sewage can smoothly pass through, and the magnetic force loss substances and the metal scraps are prevented from being damaged. The magnetic rings are distributed in a concentric circle mode, the magnetic rings and a magnetic field formed by the magnetic grid plates are mutually overlapped, a three-dimensional interception type magnetic field space is constructed, and metal magnetic pollutants are preferentially removed through the magnetic separation technology.

This invention discloses a method and system for anomaly assessment of the magnetic field of a UAV. The method includes: acquiring magnetic field measurement data of the UAV through a three-axis fluxgate sensor array; estimating the number of magnetic dipoles and spatial orientation boundaries based on the UAV's structural design information; constructing magnetic dipole range constraints based on the number of magnetic dipoles and spatial orientation boundaries; obtaining the optimal magnetic dipole parameter set based on the magnetic dipole range constraints using a genetic algorithm; embedding the optimal magnetic dipole parameter set into a magnetic field calculation model; obtaining a magnetic field intensity distribution cloud map and a closed surface with isomagnetic induction intensity of the UAV's own magnetic field under a specific scenario through the magnetic field calculation model; and performing anomaly assessment of the UAV's own magnetic field based on the magnetic field intensity distribution cloud map and the closed surface. This invention improves the determinism of the inversion results by designing a constraint strategy based on the distribution characteristics of the UAV's own magnetic source and embedding it into a genetic algorithm, thereby achieving high-precision anomaly assessment of the magnetic field.

The invention discloses a double-magnetic-source signal generating device and a drill bit orientation verification device and method, and relates to the technical field of drilling, and the double-magnetic-source signal generating device comprises a drill bit, a lower magnetic connector, a bent screw drill, an upper magnetic connector, a non-magnetic drill collar and a drill pipe column which are sequentially connected end to end; the driving device is arranged on the ground surface, is connected with the drill pipe column and is used for driving the drill pipe column to drive the upper magnetic connector and the non-magnetic drill collar to rotate at a first rotating speed, and the upper magnetic connector generates a low-speed magnetic line of force; the earth surface slurry pump circularly drives the rotor of the bent screw drill to rotate at a second rotating speed, the output shaft of the bent screw drill drives the lower magnetic connector and the drill bit to rotate at a third rotating speed, and the lower magnetic connector generates a rapid magnetic line of force; wherein the third rotating speed is the sum of the first rotating speed and the second rotating speed. The azimuth angle of the drill bit can be verified, and accurate butt joint of the drill bit of the directional well relative to the target position is ensured.

The application provides a large uniformity area double-plane coil design method based on a multiple mirror method, and relates to the technical field of magnetic shielding compensation.The method comprises the following steps: S1: regarding the shielding layer of a magnetic shielding box as an infinite plane by reflecting a magnetic source and a magnetic material with high magnetic permeability, generating mirror current, and repeatedly mirroring the mirror current by other shielding layers; S2: establishing the relationship between actual current and mirror current; S3: based on the double-plane current, the current enters the shielding layer from the air at the Q point and is refracted, the refraction angle is 45 degrees, the current is reflected at the W point in the shielding layer, enters the air from the shielding layer at the G point, the refraction angle is theta, and the R point is the position point of the current after reflection through the shielding layer.The method can improve the uniformity and the uniformity of the coil under the premise of ensuring the space utilization rate of the magnetic shielding room, so that the development cost and the weight of the magnetic shielding room are reduced.

The invention relates to the technical field of high-pressure valves, in particular to a low-power-consumption bistable electromagnetic actuator for a valve, which comprises a casing main body for accommodating other parts of the electromagnetic actuator, introducing a control wire and allowing an output component to penetrate out; the stator assembly comprises annular coil devices which are symmetrically arranged in the axial direction and generate armature magnetic flux to control an output component to move transversely, and control wiring to control the time sequence of the armature magnetic flux generated by the coil devices. The middle iron core assembly comprises a permanent magnet device capable of generating permanent magnetic flux, and the permanent magnet device is located in the symmetrical middle of the symmetrically-arranged annular coil device and used for conducting electromagnetic fixing on the output component after transverse movement is finished. The armature assembly is used for driving the output component to retract into or penetrate out of the machine shell body under the action of armature magnetic flux to execute valve switch control action, and the armature assembly is arranged in the stator assembly and penetrates through the middle iron core assembly. According to the invention, a novel composite magnetic circuit under the dual action of a constant magnetic source and an electromagnetic field is constructed, so that bidirectional active switching between steady-state positions is realized.

The utility model provides a fresh-keeping storage container and refrigeration equipment, and the fresh-keeping storage container comprises a drawer which is used for storing stored objects; the cover shell is arranged on the top of the drawer so as to cover the inner space of the drawer; the magnetic source part is arranged on the side, facing the drawer, of the cover shell and used for generating a magnetic field in the inner space of the drawer; the fixing shell is arranged on the side, away from the cover shell, of the magnetic source part, and the fixing shell is fixedly connected with the cover shell so as to clamp and fix the magnetic source part together with the cover shell. In the storage process, the magnetic source part is located above the inner space of the drawer, and the magnetic field generated by the magnetic source part can act on the stored objects in the drawer, so that the magnetic field fresh-keeping effect is achieved, and the fresh-keeping effect of the food materials is improved.

An aerosol product (10) and an aerosol generation apparatus (100). The aerosol product (10) comprises an aerosol generation member (1) and a blocking member (2) that are adjacently arranged, wherein the aerosol generation member (1) comprises an aerosol generation substrate (11) and a susceptor (12), and the susceptor (12) can generate heat energy in a magnetic field so as to heat the aerosol generation substrate (11); and the blocking member (2) comprises a carrier (21) and magnetic particles (22) dispersed in the carrier (21). The magnetic particles (22) can be effectively magnetized in a magnetic field, thereby becoming an additional magnetic source, and magnetic field coupling can occur between a magnetic field generated by the magnetic particles (22) and a magnetic field generated by an induction coil (20), such that the magnetic field strength of a magnetic field generated by the aerosol generation apparatus (100) is enhanced; and when the susceptor (12) has a machining error, an assembly error, etc., the susceptor (12) can still generate a preset magnetic strength in the magnetic field having the enhanced magnetic field strength, thereby improving the probability of the aerosol product (10) passing an identification operation.

A magnetic field-assisted additive manufacturing (MFAAM) system and method for fabricating anisotropic bonded magnets. The system includes a magnetic field source assembly including a modular Halbach holder, an inner Halbach holder, and a Halbach cylinder configured to provide a magnetic field for aligning magnetic fillers within a polymer matrix during extrusion. The field gradient of the Halbach cylinder is less than 0.0005 T / mm allowing to obtain high print quality in a large magnetic field. To enable high-temperature processing, the assembly incorporates a cooling casing fluidly coupled to a cooling medium. This active thermal management maintains the Halbach cylinder below a threshold temperature while a heated nozzle extrudes the composite material at temperatures sufficient to melt high-performance polymers. The integration of the magnetic source and cooling jacket allows for the precise alignment of magnetic domains in high-viscosity matrices, resulting in 3D-printed bonded magnets with consistent magnetic anisotropy and improved structural properties.

A method for determining the position (x; x, y) of a sensor device movable relative to a magnetic source, or a magnetic source movable relative to the sensor device; the sensor device comprising at least two magnetic sensors; the method comprising the steps of: a) obtaining a plurality of magnetic sensor signals from the magnetic sensors; b) determining or estimating the position of the sensor device based on the plurality of sensor signals or signals derived therefrom; wherein step b) comprises: determining the position (x; x, y) using an artificial neural network; the artificial neural network being a recurrent neural network trained using up to three hundred trainable parameters per degree of freedom to determine the position. Position sensor system. Position sensor device.

The present application belongs to the technical field of submarine pipeline laying, and particularly relates to a high-precision butt joint method, system and equipment for submarine pipeline laying under rocks, aiming to solve the problem that the accurate butt joint construction of the existing submarine directional drilling crossing technology can only be carried out in the horizontal direction of land or the crossing drilling between land and land. The present application comprises the following steps: through a sea drilling ship, a positioning drill bit carrying a magnetic source beacon is made to drill down through a drill rod in the butt joint sea area, a guide source is set, the first butt joint drilling tool is guided to drill to a preset butt joint area and the through position is recorded through the guide source, the first butt joint drilling tool is retracted, the second butt joint drilling tool is guided to the through position through the guide source, and directional drilling is completed. The present application enables the horizontal directional drilling construction based on magnetic source positioning to carry out rock butt joint operation in any sea area where offshore drilling operation can be carried out, and solves the problem that the butt joint in rocks between the ocean and islands can only be carried out in one-way operation.

The application discloses a transformer core intelligent stacking method based on magnetic flux leakage pole minimization optimization, and belongs to the technical field of transformer manufacturing. The method comprises the following steps: in response to a silicon steel sheet to be placed entering a stacking station, generating a background excitation magnetic field based on an excitation magnetic source in the stacking station; monitoring the spatial magnetic flux leakage distribution introduced by the silicon steel sheet in real time through a sensor array; based on the spatial magnetic flux leakage distribution, iteratively calculating an optimal placement pose through an optimization algorithm, the optimal placement pose corresponding to a minimum point of the spatial magnetic flux leakage distribution; and driving a mechanical arm to place the silicon steel sheet at the optimal placement pose. The application constructs a closed-loop feedback with actual magnetic physical quantities as the target, replaces the traditional open-loop control based on geometric alignment, and directly guides the assembly with the final electromagnetic performance, thereby significantly reducing the magnetic resistance and iron loss of the finished product core.

Provided are systems, cartridges, devices and methods for detecting a target analyte in a test sample. The system employs a multitude of magnetic sources for moving magnetic beads in a sequential movement through various portions of e.g. a cartridge or strip, such as from one or more hybridization portions, through one or more washing portions, and to a redox portion. The system employs an electrode set and a potentiostat for performing amperometry to obtain an electrochemical measurement based on conversion of a redox active molecule. Also provided are methods for detecting a target analyte using the systems, and cartridges and strips for use in the system or a device of the system.

The invention belongs to the technical field of magnetic field detection, and discloses a three-shaped fluxgate parallel matrix array for measuring the flight speed of a target and a method of the three-shaped fluxgate parallel matrix array. The three-shaped fluxgate parallel matrix array comprises three parallel mounting racks, and a plurality of sensors are respectively clamped on each mounting rack through sliding chutes; a probe of each sensor vertically faces a target; the three-shaped fluxgate parallel matrix array can be expanded along the line, and the baseline distance can be adjusted; the measurement method comprises the following steps: measuring a magnetic induction intensity vector matrix; measuring a second-order magnetic gradient tensor matrix; calculating normalized magnetic source intensity; and calculating the average speed of the target. The method is simple, a second-order magnetic gradient tensor matrix is sequentially calculated through observation points along a middle column sensor, the normalized magnetic source intensity at each observation point is calculated according to the second-order magnetic gradient tensor matrix, and compared with traditional speed measurement methods such as photoelectric detection and radar detection, the method is not influenced by a plasma sheath around a high-speed target and is not influenced by shielding of media such as fire light and smoke. The engineering practical value is realized.