1905 results about "Magnetic loop" patented technology

The invention relates to the technical field of magnetic ring detection, discloses a magnetic ring multi-dimensional nondestructive detection system and method based on multi-frequency composite electromagnetic excitation, and solves the defects of existing magnetic ring detection in the aspects of information acquisition, composite excitation and comprehensive diagnosis. The method comprises the following steps: applying multi-frequency composite excitation, and collecting and preprocessing multi-dimensional response; and extracting features, and carrying out deep learning fusion inversion to obtain magnetic characteristics, material components and defect information. The system comprises a composite excitation module, a multi-mode sensing module, a data acquisition preprocessing module, a data fusion inversion module and a control module. By adopting the technical scheme, comprehensive and efficient nondestructive detection of multi-dimensional electromagnetic information of the magnetic ring is realized, the existing limitation is overcome, and the detection precision and the comprehensive diagnosis capability are remarkably improved.

The utility model relates to the technical field of motor manufacturing equipment, and discloses a magnetic ring core sleeve press-fitting module which comprises a rotating disc device, and a core sleeve feeding station, a first alignment station, a magnetic ring pressing station and a discharging station which are distributed at intervals in the circumferential direction of the rotating disc device. The tool base assemblies are arranged on the rotating disc in the circumferential direction at intervals, and the tool base assemblies are used for supporting and limiting the core sleeves and the magnetic rings; the core sleeve feeding device is used for feeding core sleeves; the first alignment device is used for driving the core sleeve on the tool base assembly to rotate around the vertical axis to a preset angle; the magnetic ring feeding device is arranged between the first alignment station and the magnetic ring pressing station, and the magnetic ring feeding device is used for feeding magnetic rings; and the magnetic ring pressing device is used for pressing the magnetic ring above the core sleeve. According to the magnetic ring core sleeve press-fitting module provided by the utility model, the magnetic ring is automatically press-fitted on the core sleeve, and a plurality of stations operate respectively at the same time, so that the production efficiency is improved, the consistency of products is ensured, the labor cost is reduced, and the occupied space in a workshop is reduced.

The invention belongs to the technical field of electric energy meters, and particularly relates to a single-phase electric energy meter with a magnetic ring compensation structure. The device comprises a gap magnetic ring modeling unit, a compensation coil current setting unit, a driving voltage real-time generation unit and a pulse output unit, the notched magnetic ring modeling unit is used for calculating corresponding uncompensated magnetic flux based on the magnetic conductivity after temperature correction; the compensation coil current setting unit is used for forming a compensation coil current setting value; the driving voltage real-time generation unit is used for injecting bidirectional current matched with a compensation coil current set value into the compensation coil; the pulse output unit is used for triggering metering pulse output; the method has the beneficial effects of high precision, high stability, low power consumption and high robustness.

The utility model discloses a cross-shaped winding machine capable of preventing wound wires on a magnetic ring from being scratched. The cross-shaped winding machine comprises a machine frame, a first rotary clamping unit, a second rotary clamping unit, a winding mechanism, a wire hooking mechanism and a material grabbing mechanical arm, wherein the first rotary clamping unit, the second rotary clamping unit, the winding mechanism, the wire hooking mechanism and the material grabbing mechanical arm are installed on the machine frame. The first rotating unit comprises a first thread feeding and trimming mechanism and a first rotating and clamping mechanism; the second rotary clamping unit comprises a second thread feeding and trimming mechanism, a second rotary clamping mechanism and a thread blocking mechanism; the second rotary clamping mechanism comprises a clamping device used for clamping the magnetic ring, an overturning assembly connected with the clamping device and used for driving the magnetic ring to overturn, and a rotating assembly connected with the overturning assembly and used for driving the magnetic ring to rotate. The wire blocking mechanism comprises a wire blocking plate located below the clamping device and a wire blocking driving device used for driving the wire blocking plate to move up and down. According to the utility model, the first wire wound on the magnetic ring can be protected in the winding process, and the first wire is prevented from being scratched by the second wire in the winding process, so that the yield of products is improved.

The utility model discloses a brushless servo motor easy to install and debug, which comprises a shell, a rotor, a stator and an encoder assembly, and is characterized in that the rotor comprises a rotating shaft and a magnetic ring; the shell comprises a shell and a first end cover; the stator comprises a stator core and a winding; the magnetic ring is an M-pole magnetic ring; the encoder assembly comprises a PCB and a magnetic induction device, the magnetic induction device comprises N groups of Hall sensors, and N is 1 or 2; each group of Hall sensors comprises two Hall sensors, and one Hall sensor rotates 90 degrees around the center line of the rotating shaft to reach the position of the other Hall sensor; each Hall sensor is eccentrically arranged relative to the center line of the rotating shaft, and a gap is formed between each Hall sensor and the magnetic ring in the axial direction of the rotating shaft. According to the utility model, the Hall sensor directly senses the magnetic field of the magnetic ring of the rotor to determine the angular position of the rotor, an independent sensing magnet does not need to be arranged on the rotor, the structure is simple, and the installation process is simplified.

The invention provides a multi-magnetic-circuit single-magnetic-ring dual-modulation three-rotor coaxial magnetic gear and an automobile hub motor, the magnetic gear comprises an inner rotor, a T-shaped dual-modulation magnetic ring, an intermediate rotor and an outer rotor, the inner rotor, the T-shaped dual-modulation magnetic ring and the intermediate rotor are nested in sequence and are coaxially configured to form a radial and modulation coaxial magnetic gear structure; the middle rotor, the T-shaped dual-modulation magnetic modulation ring and the outer rotor are sequentially nested and coaxially arranged to form an axial and modulation coaxial magnetic gear structure; and sum modulation is adopted between the inner rotor and the intermediate rotor, sum modulation is adopted between the intermediate rotor and the outer rotor, and the two sum modulation and sum modulation share one T-shaped dual-modulation magnetic modulation ring, so that the monotonic magnetic ring dual-modulation effect is realized. The size of the magnetic gear can be reduced, the torque transmission capacity of the magnetic gear is improved, the magnetic saturation phenomenon is restrained, the magnetic field modulation effect is enhanced, and the torque density of the magnetic gear is improved.

The invention relates to the technical field of settlement monitoring, in particular to embedded type ground settlement monitoring equipment which comprises a settlement pipe, a magnetic ring and a displacement sensor, four sliding grooves are formed in the outer wall of the settlement pipe at equal intervals, sliding blocks are slidably connected to the inner sides of the four sliding grooves, the magnetic ring is slidably connected to the outer wall of the settlement pipe, and the sliding blocks are fixedly connected to the inner side of the magnetic ring. Through the arrangement of the conical block, the insertion rod, the limiting mechanism, the removing mechanism and other structures, in the monitoring equipment installation process, after the periphery of a sedimentation pipe is backfilled, the insertion rod on the magnetic ring is automatically extruded out and inserted into surrounding backfilled soil, then the limiting rod is pushed out of a sliding groove through the removing mechanism, and the magnetic ring can be installed conveniently. And the sliding positions of the limiting rod and the inserting rod are limited, so that the downward sliding limitation of the magnetic ring is relieved, the displacement sensor moves to the side of the magnetic ring, the magnetic ring is quickly mounted, the difficulty in positioning and fixing in the mounting process of the magnetic ring is avoided, and the mounting efficiency is improved.

The invention provides a double-magnetic-source micro-nano magnetic medium sealing device and a gas turbine, and relates to the technical field of sealing devices.The double-magnetic-source micro-nano magnetic medium sealing device comprises an outer rotor, an inner rotor, a first sealing assembly and a second sealing assembly; the first sealing assembly and the second sealing assembly are matched with the cavity and comprise first pole shoes, permanent magnets and second pole shoes which are sequentially arranged in the first direction, and the magnetic pole direction of the permanent magnets and the direction where the pivoting axis of the inner rotor is located are the first direction. The polarity of the permanent magnet of the first sealing assembly and the polarity of the permanent magnet of the second sealing assembly are opposite, and the permanent magnet of the first sealing assembly and the permanent magnet of the second sealing assembly are spaced in the radial direction of the inner rotor. Micro-nano magnetic media are adsorbed between the first pole shoe of the first sealing assembly and the first pole shoe of the second sealing assembly and between the second pole shoe of the first sealing assembly and the second pole shoe of the second sealing assembly. According to the invention, the stroke of a magnetic loop is shortened by adopting double magnetic sources, the magnetic field intensity at a sealing gap is increased, and the pressure resistance of a micro-nano magnetic medium under a high-speed working condition is improved.

The invention discloses a novel photovoltaic optimizer based on PLC communication, which comprises a hardware module, a control module, a communication module and a service module, and is characterized in that the hardware module is used for constructing a system material basis and realizing electric energy calling, signal coupling and equipment protection, and the control module is used for realizing intelligent power regulation and communication control; the power generation efficiency is improved and the communication stability is guaranteed through a multi-modal algorithm, and the communication module is used for constructing a power line carrier communication system. A special PLC framework for a direct-current low-voltage environment is adopted, a communication frequency band and an impedance matching scheme can be designed according to photovoltaic direct-current side characteristics, technical field differentiation is formed from alternating-current power grid PLC patents, through dual-mode MPPT dynamic switching, the limitation of a single algorithm in a dynamic environment can be broken through through combination of local gradient prediction and a distributed collaborative algorithm, and the real-time performance of a photovoltaic power grid is improved. In cooperation with a passive impedance compensation technology, adaptive adjustment can be performed through the magnetic ring filter and the capacitor array, an additional power supply module is not needed, and the hardware complexity is reduced.

The utility model provides a power assembly and a converter. The power assembly comprises a machine-side power module, a network-side power module, a positive direct-current bus conducting bar, a negative direct-current bus conducting bar and a direct-current bus capacitor, the machine side power module is connected with a motor, the network side power module is connected with a power grid, and the positive direct current bus conducting bar and the negative direct current bus conducting bar are connected between the machine side power module and the network side power module. The direct current bus capacitor is arranged between the positive direct current bus conducting bar and the negative direct current bus conducting bar; the power assembly further comprises at least one magnetic ring arranged on the positive direct current bus conducting bar and / or the negative direct current bus conducting bar. According to the power assembly and the converter, through the at least one magnetic ring arranged on the positive direct current bus conducting bar and / or the negative direct current bus conducting bar, the ripple current of the bus capacitor is prevented from being too large, the loss of the bus capacitor is reduced, and the bus capacitor is prevented from being burnt.

The invention relates to a winding method of an inductance coil, which comprises the following steps of: fixing a wire rod, hooking the wire rod by a crochet hook, hooking the wire rod by a wire hook, unhooking the crochet hook, lifting the crochet hook and reversely rotating by a certain angle to separate the crochet hook from the wire rod, and continuously rotating a wire hooking disc until one end of the wire rod with a wire end is completely wound on the periphery of the wire hooking disc. Winding: a wire clamping mechanism drives the wire to perform arc-shaped winding action, and the wire is moved to the position above the magnetic ring and crosses an inner hole of the magnetic ring; and the steps are repeated, so that the wire is uniformly wound on the magnetic ring. According to the wire winding method, the wire is wound on the periphery of the wire hooking disc, the size of the wire storage mechanism can be greatly reduced, the wire is in a controlled state in the winding process, the phenomena of winding, knotting and the like are avoided, the tail of the wire cannot float disorderly, and the problem that an insulating layer is scratched can be effectively solved. And a longer wire can be wound by using equipment with a smaller size, so that the space of a plant is saved.

The invention belongs to the technical field of mechanical transmission systems, and particularly discloses a method and a system for calculating, regulating and controlling the vibration isolation rate of a rigidity-variable magnetic torsional vibration buffer, and the method comprises the following steps: obtaining a real-time working condition, modeling a single permanent magnet magnetic field by adopting an equivalent magnetic charge method, and calculating the vibration isolation rate of the rigidity-variable magnetic torsional vibration buffer; a magnetic block negative stiffness model and a spring torsion sheet positive stiffness model of the annular Halbach array are constructed, the total coupling stiffness is calculated, the vibration isolation effect of the magnetic torsional vibration buffer is solved, vibration suppression effects and resonance interval distribution under different working conditions are obtained, and based on the vibration isolation effect of the magnetic torsional vibration buffer, the vibration suppression effect of the magnetic torsional vibration buffer is calculated. The gap adjustable mechanism adjusts the rigidity of the spring torsion sheet and the gap of the magnetic ring in real time. By the adoption of the technical scheme, the gap between the inner magnetic ring and the outer magnetic ring is flexibly set according to multi-working-condition requirements, so that applicability and reliability are improved, and low-frequency torsional vibration is effectively restrained while efficient torque transmission is ensured.

The invention discloses an insulator-based voltage and current integrated intelligent sensing device and method.The insulator-based voltage and current integrated intelligent sensing device comprises a voltage sensing unit, a current sensing unit and an insulation fixing box, firstly, line voltage and current are detected on the basis that the insulation performance and mechanical strength of an insulator are kept sufficient; then, the voltage sensing unit realizes uniformization of an induced electric field, determination of a transfer function and relative minimization of partial discharge, and the voltage sensing unit is implanted into the insulator, so that the insulation performance of the voltage sensing unit is good; and finally, the current sensing unit improves the magnetic field measurement sensitivity by utilizing the magnetic gathering capability of the open type magnetic ring air gap and the optimization design of the magnetic ring structure parameters, and enhances the magnetic interference resistance by utilizing the optimization design of the magnetic ring structure parameters and the magnetic ring series.

The invention relates to a method for adjusting the magnetic field intensity uniformity of magnetic poles of a radiation orientation magnetic ring, belongs to the technical field of magnetic field uniformity control, and solves the problems in the prior art that the difference value of nonuniformity between the magnetic poles of a magnetic ring is large; the magnetic field intensity uniformity of the magnetic poles of the magnetic rings is not high; and the distribution consistency of the magnetic field intensity of the magnetic poles of the magnetic rings is difficult to accurately control and adjust. A radiation orientation magnetic ring magnetic pole magnetic field intensity uniformity adjusting method sequentially carries out magnetic field intensity local adjustment on magnetic ring magnetic poles in sequence in an open circuit environment, and the adjusting method comprises the steps that an adjusting magnetic field is applied to each magnetic pole at the local position of a single magnetic pole, and meanwhile the surface area of each magnetic pole is heated to a certain temperature. And the regulation and control preparation of the high-uniformity radiation orientation magnetic ring is realized.

The invention discloses a switch cabinet electric leakage emergency protection processing device, and belongs to the technical field of switch cabinet electric leakage protection, the switch cabinet electric leakage emergency protection processing device comprises a box body fixedly arranged on the inner bottom surface of a cabinet body, an electric leakage processing assembly is arranged in the box body, and a live wire and a zero wire respectively penetrate through an inlet wire fixing assembly, the electric leakage processing assembly and an outlet wire fixing assembly in sequence; the electric leakage processing assembly comprises an automatic disconnection assembly and a current abnormity triggering assembly, the current abnormity triggering assembly comprises a circular magnetic ring, the peripheral outer wall of the circular magnetic ring is wrapped with a copper wire, the circular magnetic ring is fixedly arranged in the box body and corresponds to the outgoing line fixing assembly, and the live wire and the zero wire both penetrate through the middle of the circular magnetic ring. And the live wire and the zero wire are wound on the circular magnetic ring for one circle. When a small magnetic field is subtracted from a large magnetic field, a magnetic field is cutting a copper wire coil, current is generated in the coil, the current generated by a copper wire flows into the current abnormity triggering assembly, the current abnormity triggering assembly controls the automatic disconnection assembly to disconnect a circuit, and timely power-off protection of the switch cabinet is realized.

The invention relates to the technical field of alternating-current and direct-current power distribution, in particular to a flexible power distribution transformer for an alternating-current and direct-current power distribution network and installation equipment, and discloses the flexible power distribution transformer for the alternating-current and direct-current power distribution network. And the high-voltage side coil, the alternating-current low-voltage side coil, the direct-current low-voltage side coil and the direct-current low-voltage side coil with adjustable turns are connected with a series power module for voltage compensation and a parallel power module for current compensation. The beneficial effects of the invention are that a principle of magnetic field coupling balance of multiple power supplies in a magnetic loop is adopted to achieve the purpose of energy flow and interaction control in different directions, and the flexible adjustment of voltage and current at the low-voltage end of the transformer and the convenient access and interaction of the direct-current power supply and the direct-current load are realized; and the requirements of power distribution network voltage bidirectional cross-border treatment, current-related electric energy quality treatment and convenient access and interaction of a direct-current power supply and a load in novel power system application are met.

The invention discloses an integrally sintered neodymium iron boron Halbach ring multi-pole rotating excitation magnetic field press which comprises a rack, a base, a die assembly, an upper die servo electric cylinder mechanism, a lower die servo electric cylinder mechanism, an excitation structure and a rotating excitation device. The base is fixedly arranged on the ground or a working platform; the rack is mounted above the base; the die assembly comprises an upper annular male die, a lower annular male die, a non-magnetic steel female die, a magnetic conductive die core and a die base. The excitation structure comprises an excitation frame, an excitation coil, an excitation pole and a magnetic conductive pole shoe; excitation forming of any even number of poles can be carried out by using a mold of the same size, the requirement for multiple pole numbers is met, the equipment investment is reduced, the production cost is reduced, the production period is shortened, the production flexibility and efficiency are improved, the diversified requirements of different clients and application scenes for the Halbach magnet ring are met, and the production efficiency is improved. The problems that an existing magnetic field press is single in forming pole number and uneven in surface magnetic field distribution are solved, and technical conversion and marketization are promoted.

The invention provides a broadband weak current sensing method and system for distribution network voltage inversion. The system comprises a tunneling reluctance magnetic core, a feedback coil, an open magnetic ring, a sampling resistor and a feedback conditioning circuit. One side, close to the feedback conditioning circuit, of the open magnetic ring is provided with an opening; the number of the tunneling magnetic resistance magnetic cores is two, and the two tunneling magnetic resistance magnetic cores are symmetrically arranged with the center of the opening of the opening magnetic ring as the symmetry point and used for obtaining two current data with opposite sensitivity directions. The two tunneling magnetic resistance magnetic cores are connected with one end of the feedback conditioning circuit, and the other end of the feedback conditioning circuit is sequentially connected with the feedback coil and the sampling resistor; according to the invention, two pieces of tunneling magnetic resistance magnetic cores are symmetrically arranged in the current sensor, so that feedback current data with opposite sensitivity directions are obtained, high-precision induction current output data are obtained after offset voltage and temperature drift correction, and high-precision data support can be provided for subsequent voltage inversion and related work.

The invention relates to the technical field of electric signal data processing, in particular to a cable life prediction method based on working condition movement. The method comprises the following steps of: sleeving a leakage flux ring on the periphery of a cable shielding layer, wherein a Hall array is arranged in the leakage flux ring; an acoustic emission patch is attached to the surface of the shielding layer; a mechanical trigger is arranged at the joint of the cable drag chain; when the mechanical trigger detects a complete bending stroke every time, the Hall array and the acoustic emission patch are started synchronously, and a magnetic flux leakage pulse amplitude value and an ultrasonic elastic wave energy value of the current stroke number are generated; dividing the magnetic flux leakage pulse amplitude value of the same stroke number by the ultrasonic elastic wave energy value to obtain a broken wire coefficient of the stroke number; and accumulating the broken wire coefficients of the continuous stroke numbers of the cable to form a theoretical accumulated broken wire index. According to the invention, through the magnetic flux leakage and acoustic emission monitoring technology and in combination with the accelerated bending test, accurate quantification and life prediction of the broken wire state of the cable are realized, and finally, the reliability of the whole life cycle management of the cable is improved.

The present invention relates to the technical field of encoders, and particularly to a high-performance magnetic ring encoder and a method for detecting the absolute angle of the magnetic ring encoder. The high-performance magnetic ring encoder includes a second multi-pole magnet, a first multi-pole magnet, a single-pole magnetic conductor assembly, a first group of Hall elements, a second group of Hall elements, and a third group of Hall elements; the single-pole magnetic conductor assembly has a toothed portion and a smooth portion, the first group of Hall elements and the second group of Hall elements are respectively arranged adjacent to the first multi-pole magnet and the second multi-pole magnet, the third group of Hall elements is arranged between the toothed portion and the smooth portion, and the three groups of Hall elements output corresponding detection signals according to the pole signals of the corresponding magnets. The present invention calibrates the rotation angle of the magnetic ring encoder by obtaining a mechanical angle with a certain accuracy, thereby greatly improving the measurement accuracy. The present invention is particularly suitable for meeting the actual requirements of angle detection of large-diameter shaft parts.

The utility model belongs to the technical field of magnet ring installation structures, and discloses a novel magnet ring structure convenient to install, which comprises a device main body and a magnet ring, a transmission cavity is arranged on the device main body, a rotating disc is rotatably installed in the transmission cavity, and the magnet ring can be conveniently installed through the arranged structures such as the rotating disc, a sliding shaft and an arc-shaped clamping block. When the magnetic ring needs to be fixed, the rotating disc rotates, the sliding shafts are limited through the limiting sliding holes, the sliding shafts slide in the arc-shaped sliding grooves and slide along the limiting sliding holes at the same time, and then the purpose that the four sliding shafts get close to one another is achieved; the four arc-shaped clamping blocks are driven to be close to each other to clamp and fix the magnetic rings, and the four arc-shaped clamping blocks can be driven to be close to each other or far away from each other through the rotating disc to adapt to the sizes of the magnetic rings according to the magnetic rings of different sizes, so that the adaptability of the device is improved, and the magnetic rings of different sizes can be fixed conveniently.

The utility model belongs to the technical field of magnetizing, and discloses a multi-pole magnetic ring magnetizing device which is characterized in that a rotating plate is rotatably connected to a first supporting plate around the central axis of the rotating plate; the fixed plate is fixedly connected to the first supporting plate and stacked on the rotating plate. The multiple positioning magnetizing structures are distributed at intervals and are all slidably connected to the fixing plate. And the positioning magnetizing structure can magnetize the multi-pole magnetic ring. The rotating plate is configured to drive the multiple positioning magnetizing structures to be synchronously close to or away from each other when rotating around the central axis of the rotating plate. And when the plurality of positioning magnetizing structures are close to each other, the multi-pole magnetic ring can be clamped among the plurality of positioning magnetizing structures and is supported on the fixed plate or the rotating plate. The multi-pole magnetic ring can be accurately rotated to an optimal magnetizing state, so that a plurality of magnetic poles of the multi-pole magnetic ring are accurately in one-to-one correspondence with the distribution positions of a plurality of positioning magnetizing structures, and each magnetic pole of the multi-pole magnetic ring can be accurately magnetized. And the working performance of the multi-pole magnetic ring magnetizing device is effectively improved.

The invention provides an intrinsically safe laser analyzer, and belongs to the technical field of gas detection, the intrinsically safe laser analyzer comprises an analyzer main body and a gas channel, the analyzer main body comprises a laser emitter, a laser receiver and a detection pipeline, and the intrinsically safe laser analyzer also comprises a gas guide adjusting assembly and a sampling cleaning assembly; opening and closing of the arc-shaped blocking cover can control opening and closing of the gas guide port, the arc-shaped blocking cover is buckled to seal the gas guide port when detection is not carried out, and the influence of the detection pipeline on gas circulation in the gas channel is reduced; the two arc-shaped blocking covers are matched with the elastic wind shielding cloth, so that gases at different heights are guided and mixed, and the accuracy of a detection result is improved; the electromagnet is used for controlling the magnetic ring to move, so that the corrugated sleeve stretches out and draws back to change the size of the internal space, gas suction and discharge and detection in a relatively closed space are achieved, the gas state is relatively stable, and the detection error caused by molecule activity is reduced; and gas entering is not affected, and the detection efficiency is improved.

The invention relates to a low-damage sputtering cathode and a sputtering coating method and relates to the technical field of sputtering coating, the sputtering cathode comprises a shell, a first magnetic ring, a first target material ring, a second magnetic ring and a second target material ring, the shell is annular, and a mounting plate is arranged at one end of the shell; the first magnetic ring, the first target material ring, the second magnetic ring and the second target material ring are located in the shell and are all connected with the mounting plate; the first magnetic ring, the first target material ring, the second magnetic ring and the second target material ring are coaxially arranged, the first target material ring is arranged on the outer side of the first magnetic ring in a sleeving mode, the second target material ring is arranged on the outer side of the first target material ring in a sleeving mode, the second magnetic ring is arranged on the outer side of the second target material ring in a sleeving mode, and the inner side wall of the second target material ring and the outer side wall of the first target material ring are arranged in a spaced mode. When the sputtering cathode is used for sputter coating, the kinetic energy of sputtered particles can be reduced, so that the damage of the sputtered particles to a base material is reduced.

The utility model relates to switch rail longitudinal displacement monitoring equipment which comprises a stock rail device arranged on a stock rail and composed of a rear-end clamp, a stock rail front-end clamp, a small-aperture base plate, a large-aperture base plate, a magnetostrictive sensor, a bolt, a cotter pin and the like; the switch rail device is arranged at the heel end of the switch rail and is composed of a rear end clamp, a switch rail front end clamp, a switch rail clamp base plate, a magnetic ring and the like. The high-precision measurement of the longitudinal displacement of the switch rail is realized by measuring the relative position of the magnetic ring and the measuring rod of the magnetostrictive sensor. The switch rail longitudinal displacement measuring device does not need to be driven by big data, can realize high-efficiency and high-precision measurement of switch rail longitudinal displacement under different environmental conditions, and meets the requirements of low-cost, high-stability and high-precision railway field monitoring.

The invention discloses a compact magnetic deflection system for neutral beam injection. The compact magnetic deflection system comprises an iron yoke assembly, two magnet assemblies with the same structure and a magnet protection assembly, the iron yoke assembly is of a rectangular frame structure and forms a complete magnetic loop, the two magnet assemblies are oppositely arranged in the iron yoke assembly, and a channel is reserved between the two magnet assemblies. The magnet protection assembly surrounds the two magnet assemblies; the magnet assembly comprises a magnet exciting coil box, an iron core and an electrified coil, two space grooves are formed in the excitation coil box in a rectangular-ambulatory-plane mode, the iron core is located in the space groove in the inner layer, the electrified coil is located in the space groove in the outer layer, and the head end and the tail end of the electrified coil extend out of the side edge of the excitation coil box in the same direction; charged ions flexibly deflect out of an original beam line channel by changing the current of the electrified coil or the number of turns of the coil. According to the invention, mixed charged ion beams can be effectively filtered out, and purified neutral beam injection is realized.

A photovoltaic detection assembly includes a magnetic component and a detection component. The magnetic component includes a magnetic ring and a coil winding around the magnetic ring. The magnetic ring is sleeved on the cable and comprises an opening. Two end surfaces of the magnetic ring are disposed on two sides of the opening. The two end surfaces of the magnetic ring are arranged in parallel. The detection component comprises a Hall element, a detection module, a control module, a signal module, and a power module. The Hall element is disposed at the opening. The detection module is electrically connected to the Hall element. The control module is electrically connected to the detection module, the signal module, and the power module respectively. The power module is electrically connected to the coil.

The invention relates to the technical field of current transformers, in particular to a current transformer for suppressing electromagnetic interference by adopting a high-frequency magnetic ring method. A housing; the number of the ports is two, and the two ports are fixedly connected and penetrate through the shell. The coil is fixedly connected to the interior of the shell; the number of the main magnetic rings is two, and the two main magnetic rings are fixedly connected to the interior of the shell and distributed on the two sides of the coil respectively; the fixing frame is fixedly connected to the interior of the shell, the fixing frame is in sliding connection with a plurality of sliding frames, each sliding frame is fixedly connected with two auxiliary magnetic rings, and the auxiliary magnetic rings are attached to the adjacent main magnetic rings; the stabilizing assembly is arranged in the shell; and the driving assembly is arranged in the shell. By changing the attaching position of the auxiliary magnetic ring and the main magnetic ring, the side, close to an external electric appliance element, of the main magnetic ring is superposed with the auxiliary magnetic ring, the resistance to an external interference magnetic field is improved, and the current detection precision of the device is improved.

The invention discloses a device for detecting the leakage current of a post insulator in a switch cabinet and an evaluation method thereof, and relates to the technical field of on-line monitoring of power equipment, the device comprises a TMR sensor, a magnetic ring with an air gap, a signal conditioning module and a microprocessor, the TMR sensor is arranged in the air gap, and the magnetic ring detachably sleeves the post insulator in the switch cabinet; the TMR sensor is used for collecting a magnetic signal caused by the leakage current of the post insulator and transmitting the magnetic signal to the signal conditioning module. The signal conditioning module is used for processing the magnetic signal and sending the processed magnetic signal to the microprocessor; and the microprocessor is used for analyzing the processed magnetic signals and determining multi-dimensional parameters of the leakage current. In the method, the operation state of the post insulator is evaluated by using the multi-dimensional parameters of the leakage current, so that the sensing capability of a weak magnetic field can be greatly improved, and the operation state of the post insulator can be accurately evaluated.

The invention relates to the technical field of power cables, and discloses a parallel power cable current sharing optimization method and device based on a magnetic ring current equalizer, and the method comprises the steps: carrying out the simulation of a three-dimensional finite element model, and determining first simulation impedance; obtaining an equivalent circuit model, determining theoretical impedance according to the equivalent circuit model, and determining current impedance according to the theoretical impedance and the first simulation impedance; obtaining an electromagnetic field coupling model, determining a magnetic ring compensation parameter, and simulating the electromagnetic field coupling model according to the magnetic ring compensation parameter and the current impedance to determine an impedance compensation mapping relation; and determining an impedance compensation sensitivity matrix according to the impedance compensation mapping relation, and setting values of magnetic ring compensation parameters so as to perform current sharing optimization on the parallel power cables. According to the invention, the mapping relation between the magnetic ring compensation parameter and impedance compensation of the magnetic ring current equalizer can be quantified, thereby accurately generating an optimal compensation scheme, greatly improving the reliability of the parallel power cable, and facilitating the realization of power transmission safety.