228 results about "Magnetic effect" patented technology

A power transmission line vibration energy collection device based on a triboelectricity-electromagnetic effect belongs to the technical field of power transmission line self-powered equipment, and comprises a shell, a wire clamp device, a triboelectricity unit, a vibrator structure and a cantilever beam structure, and can collect multi-frequency and multi-amplitude vibration energy of a power transmission line in the vertical direction. And the cantilever beam-magnetic coupling structure is adopted to improve the low-order modal frequency, so that the vibration frequency response range of the self-powered device is widened, and the self-powered device has the following advantages that 1, efficient low-frequency energy collection is realized, and the vibrator structure can effectively collect low-frequency vibration energy by virtue of the gravity of the vibrator structure and the action of the supporting spring; 2, the fatigue resistance is excellent, and the cantilever beam does not directly participate in excitation of the triboelectric energy harvesting unit, so that the risk of fatigue fracture of the cantilever beam is effectively reduced; and 3, the energy collection capability of the device is improved, and friction electricity energy harvesting and electromagnetic energy harvesting are combined, so that the collection efficiency of high-frequency excitation energy can be further improved.

The invention discloses a flexible multi-dimensional force sensor based on centripetal gradient magnetic field design and a preparation method thereof, and belongs to the field of electronic devices. A flexible multi-dimensional force sensor sequentially comprises, from top to bottom, a protection layer comprising a flexible substrate material having a force sensitive characteristic; a cross-shaped groove is formed in the bottom face of the magnetic film layer, the edge of the groove is in an arc shape, and a magnetic field with gradient magnetic flux can be formed; a buffer layer including a strained material having a stepped shape; and the transmission layer comprises an electromagnetic effect chip with a triaxial magnetic field sensing capability and a reading circuit of the electromagnetic effect chip. Compared with the prior art, the sensor provided by the invention realizes natural decoupling from the magnetic field design, and has decoupling capability on three axes. The gradient design enables the sensor to have different response slopes at different stress stages when the sensor is stressed, the force measurement range of the device is greatly improved, and the sensing sensitivity and the sensing range on three axes are the same.

The application discloses a flexible multi-dimensional force sensor based on a centripetal gradient magnetic field design and a preparation method thereof, and belongs to the field of electronic devices. The flexible multi-dimensional force sensor comprises, from top to bottom, a protective layer, a magnetic film layer, a buffer layer and a transmission layer. The protective layer comprises a flexible base material with force-sensitive characteristics. The magnetic film layer is provided with a cross-shaped groove on the bottom surface, and the edges of the groove are arc-shaped, so that a magnetic field with a gradient magnetic flux can be formed. The buffer layer comprises a strain material with a stepped shape. The transmission layer comprises an electromagnetic effect chip with three-axis magnetic field sensing capability and a readout circuit thereof. Compared with the prior art, the sensor of the application realizes natural decoupling from the magnetic field design, and has decoupling capability on three axes. The gradient design of the application enables the sensor to have different response slopes at different stress stages when subjected to stress, greatly improves the force measurement range of the device, and the sensing sensitivity and range on the three axes are the same.

The invention provides a linear Halbach array based on a non-uniform permanent magnet and a preparation method of the linear Halbach array, and belongs to the field of permanent magnets. The method comprises the steps that the interior of a mold is divided into an area A1, an area A2 and an area B, wherein the area A1 and the area A2 are symmetrical on the two sides and concave in an arc shape; the B area is loosely filled with low-grade magnetic powder, and the A1 area and the A2 area are loosely filled with high-grade magnetic powder; carrying out compression molding and magnetization orientation to obtain a neodymium iron boron pressed blank; the neodymium-iron-boron pressed blank is subjected to heat treatment after being demolded to obtain the non-uniform permanent magnet, and the heat treatment comprises preheating, gradient sintering of first heating and then cooling, and tempering treatment; and (2n + 3) groups of non-uniform permanent magnets are adhered and fixed by using magnet glue to obtain the linear Halbach array. According to the non-uniform permanent magnet, the non-uniform permanent magnet is manufactured by adopting different marks of magnetic powder partition mold pressing, region strengthening is carried out on the edge, the demagnetization effect of the magnet at the corner angle under the extreme condition is reduced, the local intrinsic coercive force is improved, the service performance of the magnet is enhanced, and the performance of a Halbach array assembled by the non-uniform permanent magnet is promoted to be more excellent.

The present invention belongs to the field of fast mechanical switch operating mechanism, and discloses an electromagnetic repulsion mechanism coil based on a slotted yoke, comprising: a coil frame, a baffle, a fastener, a winding coil and a yoke; the yoke is a radially slotted separate structure, a coil frame is arranged at the center of the yoke, the outside of the yoke is surrounded by fasteners and fixed together on the baffle, and a winding coil is arranged inside the yoke; the flow path of the induced eddy current in the yoke is increased by radial grooving, and the eddy currents in the yokes on both sides of the slots are in opposite directions, which offsets the demagnetization effect of the eddy current, reduces spatial magnetic leakage, improves energy conversion efficiency, and improves driving efficiency. The electromagnetic repulsion mechanism coil provided by the present invention can effectively reduce the eddy current loss and magnetic saturation effect of the yoke itself, help reduce spatial magnetic leakage, and improve the driving efficiency of the electromagnetic repulsion mechanism.

The invention discloses a V-shaped consequent-pole magnetic flux reverse permanent magnet motor, which comprises a stator provided with a winding and a permanent magnet and a rotor arranged on the inner side of the stator and coaxially assembled with the stator, the rotor and the stator both adopt a doubly salient structure, the stator is provided with a stator slot, the winding is arranged in the stator slot, the inner ring of the stator is provided with stator teeth, and the stator teeth are arranged in the stator slot. A plurality of stator units are evenly distributed on the stator in the circumferential direction, each stator unit comprises a left stator tooth, a right stator tooth and two V-shaped permanent magnets, the polarities of four single permanent magnets forming the two V-shaped permanent magnets are the same, and ferromagnetic pole shoes beside the permanent magnets automatically serve as the other pole and are of a consequent pole structure. And the two V-shaped permanent magnets in the stator unit are respectively arranged in the left stator tooth and the right stator tooth. The V-shaped permanent magnets are adopted, and the magnetomotive force of the permanent magnets can be effectively increased due to the fact that the V-shaped permanent magnets have the magnetism gathering effect, so that the torque density is increased.

The invention relates to the technical field of laser cutting, in particular to a laser cutting device for metal plate machining. Comprising a machining platform, and a self-adjusting connecting mechanism is arranged above the machining platform; and a laser generator is mounted in the center of the bottom of the self-adjusting connecting mechanism. Four magnetic limiting plates are controlled to move towards the groove of the laser generator, when the four magnetic limiting plates are close to the groove, the four magnetic limiting plates can rotate towards the groove under the magnetic effect, and after the four magnetic limiting plates enter the groove, fixing of the laser generator is completed; according to the laser cutting device, the laser generator can be rapidly disassembled when the laser generator breaks down and needs to be maintained, a plurality of sets of fourth electric push rods can be independently controlled to adjust the angle of the laser generator, the edges of cut metal plates are neater after flattening work, the maintenance efficiency of the laser cutting device is improved, and the laser cutting device is convenient to use. And the working quality of the laser cutting device is also improved.

The utility model discloses a magnetism gathering type linear motor, comprising a stator comprising a stator yoke portion extending along the X-axis direction and a plurality of stator tooth portions arranged on the stator yoke portion at intervals along the X-axis direction; the mover is arranged opposite to the stator in the Y-axis direction, and the mover comprises a mover yoke part and an iron core monomer connected with the mover yoke part; each single iron core comprises an iron core end part and first permanent magnets and second permanent magnets which are arranged on the iron core end part, the magnetizing directions of the first permanent magnets and the second permanent magnets are not parallel, the first permanent magnets and the second permanent magnets are alternately arranged along the X-axis direction, the number of the first permanent magnets is N, the number of the second permanent magnets is N-1, and N is greater than or equal to 2; the stator tooth part comprises a stator top wall adjacent to the iron core single body and two first stator side walls connected to the two sides of the stator top wall in the X-axis direction, and a chamfer structure is formed between the stator top wall and the first stator side walls. By adopting the structure, the magnetic gathering effect is obvious, and the cogging force of the motor is effectively reduced.

The invention discloses drilling and polishing combined machining equipment based on hardware precision machining, and relates to the technical field of machining machine tools, the drilling and polishing combined machining equipment comprises a drilling machine, a hydraulic telescopic rod is arranged on the outer side of the drilling machine, a machining assembly is arranged at the telescopic end of the hydraulic telescopic rod, and the drilling and polishing combined machining equipment further comprises a drilling supporting table arranged below the machining assembly; a clamping assembly is arranged at the top of the drilling supporting table. The supporting pieces are pushed to move and rise through magnetic force, the multiple supporting pieces can be attached to the bottoms of the workpieces under the action of magnetism, liquid is injected into the mounting frame through the injection molding assembly after attachment is completed, the supporting pieces can be kept stable after rising, and annular attachment supporting is conducted on the positions, needing drilling, of different workpieces.

The invention relates to the technical field of microwave ferrite devices, and discloses a miniaturized broadband microstrip circulator based on a double-ferrite nested structure, comprising a substrate, the upper surface of which is provided with a magnetic conductive sheet; a high dielectric ceramic is arranged on the magnetic conductive sheet, and a low magnetic saturation ferrite and a high magnetic saturation ferrite are sequentially nested in an inner cavity of the high dielectric ceramic; a circuit is arranged on the upper surface of the high-dielectric ceramic, and a ceramic piece and a permanent magnet are sequentially installed above the circuit. According to the circulator, a magnetic conductive sheet is additionally arranged, a structure with high dielectric ceramics as a core is constructed, the characteristic difference of two ferrite gyromagnetic materials with different magnetic saturation intensities is utilized, and the frequency resonance characteristic of a center junction is adjusted through nested arrangement, so that gyromagnetic effects under different frequencies are complementary to expand the working frequency band. Meanwhile, the high-dielectric ceramic optimizes port impedance matching and reduces electromagnetic wave reflection by virtue of a high dielectric constant, and cooperates with an internal ferrite nested structure, so that the frequency bandwidth is widened through a composite material mode, and miniaturization and broadband effects are achieved.

The invention relates to a magnetic gripper (10) for gripping a battery cell, comprising a contact surface (12) for contacting the battery cell to be gripped, a magnet for providing a magnetic effect on the contact surface for the purpose of gripping the battery cell, and a plurality of centering elements (22) for guiding the battery cell to the contact surface, wherein the plurality of centering elements are designed as projections that are arranged crown-like around the contact surface and each extend at least partially in a direction leading away from the contact surface. The invention also relates to a gripper array, a gripper system, and a gripper array system.

The invention provides a goaf high-temperature point detection and positioning method based on a demagnetization phenomenon, and the method comprises the steps: selecting a high-temperature-resistant and high-thermal-sensitivity magnetic material which has a remarkable demagnetization effect in a specific temperature range; the magnetic materials are uniformly arranged in the coal mine goaf, the data acquisition module is arranged, the magnetic change of the magnetic materials is monitored through the data acquisition module, monitoring data are uploaded to the upper computer, the upper computer analyzes the magnetic change of the materials, the temperature change condition of the magnetic materials is judged, and the position of the high-temperature point of the goaf is locked. The problems that in a traditional detection method, generally, a detector needs to carry detection equipment to make close contact with a high-temperature point, namely, active close-distance detection is needed, and remote automatic detection cannot be achieved are solved. Belongs to the field of mine composite disaster prevention.

The invention discloses a motor rotor and a generator, and relates to the technical field of motors, the motor rotor comprises a rotor support, a plurality of magnetic pole units are uniformly assembled on the side wall of the rotor support in the circumferential direction, and an inter-pole gap is reserved between every two adjacent magnetic pole units; each magnetic pole unit comprises a magnetic pole permanent magnet attached to the side wall of the rotor support, a pressing strip and an inter-pole magnetism gathering permanent magnet are assembled at the inter-pole gap, the inter-pole magnetism gathering permanent magnet is attached to the side wall of the rotor support, and the left end and the right end of the inter-pole magnetism gathering permanent magnet abut against the magnetic pole permanent magnet. The pressing strips are assembled on the interelectrode magnetism gathering permanent magnets and fixed through the fixing pieces, and the pressing strips and the fixing pieces press and fix the magnetic pole permanent magnets and the interelectrode magnetism gathering permanent magnets on the side wall of the rotor support. The motor rotor provided by the invention is obvious in magnetism gathering effect and has an air-gap magnetic field which is closer to sine distribution, and due to the existence of the magnetism gathering permanent magnets, the gap between poles is filled up, so that the surface of the rotor is smoother, and the wind friction loss is reduced.

The invention provides a functional alloy capable of obtaining permanent magnet performance (stretching induced magnetic effect) through stretching and a preparation method of the functional alloy. The expression of the functional alloy is FeaNibCocAld, a, b, c and d respectively represent the atomic percentage (at.%) of corresponding elements, a = 40-50, b = 25-35, c = 10-20, d = 5-15, and a + b + c + d = 100. The preparation method of the functional alloy comprises the steps of smelting, rolling and heat treatment. The BCC magnetic particles are precipitated and separated out through rolling and heat treatment processes, so that the BCC magnetic particles have the special performance of generating magnetic force under the action of tensile strain. And the number of BCC magnetic particle precipitates can be controlled by adjusting the heat treatment temperature, so that the magnetic field intensity of the alloy after breaking is regulated and controlled. The maximum magnetic induction intensity of the functional alloy after tensile fracture is increased to 122 Gs from 2Gs of an original alloy through rolling and heat treatment processes, and the maximum magnetic induction intensity of the functional alloy after tensile fracture can be regulated and controlled within a certain range by adjusting the heat treatment temperature. The effect of obtaining the permanent magnet performance through stretching is found for the first time, a method for regulating and controlling the magnetic induction intensity is found, stress changes and magnetic signal changes can correspond to each other through the phenomenon, and therefore the method is expected to be applied to some specific equipment.

The invention discloses a magnetic-mechanical-electric coupling amplitude-change pole simulation method based on finite element analysis, and relates to the technical field of magnetoelectric antenna simulation. The magnetic-mechanical-electric coupling amplitude-change pole simulation method based on finite element analysis comprises the steps that parametric modeling is carried out, and a multi-physical field environment is imported; defining material attributes; solid mechanics, an electrostatic field and a magnetic field are coupled, and piezoelectric and piezomagnetic effects are started; dividing grids and configuring a solver; executing simulation calculation; and evaluating displacement and stress results and performing iterative optimization. According to the magnetic-mechanical-electric coupling amplitude-change pole simulation method based on finite element analysis, through multi-physics field coupling simulation, electric-mechanical-magnetic energy conversion is accurately simulated, the problem of traditional simulation distortion is solved, a high-performance amplitude-change pole capable of amplifying the amplitude of a permanent magnet sheet to 9 micrometers is guided to be designed, and the radiation capacity and reliability are remarkably improved.

The invention provides an intelligent copper release nano preparation triggered by a magnetic effect as well as a preparation method and drug application thereof. The preparation is ES (at) Fe3O4 (at) SiO2-Cu; the preparation method comprises the following steps: adding FeCl3. 6h2O and CH3COONa into ethylene glycol, and carrying out hydrothermal reaction, washing and magnetic separation; dispersing the ferric oxide magnetic fluid in ammonia water for ultrasonic treatment, adding an ethanol solution containing 20% of tetraethyl silicate and a copper nitrate mixed solution for continuous reaction, washing with ethanol water, performing magnetic separation, dispersing the Fe3O4-coated SiO2-Cu fluid in an ammonium nitrate isopropanol solution, adding isopropanol water for ultrasonic treatment after magnetic separation, washing with ethanol water, replacing water with pure ethanol, and performing vacuum drying to obtain Fe3O4-coated SiO2-Cu; dispersing the mixture and ES in water, and carrying out violent ultrasonic oscillation; and dialyzing the bag overnight, and collecting to obtain ES (at) Fe3O4 (at) SiO2-Cu. The device is high in penetration depth, suitable for deep tumor treatment and good in heating efficiency under an alternating magnetic field.

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 raw material conveying, and particularly discloses a raw material conveying and supplying device which comprises a shell, a conveying belt is arranged in the shell, a discharging hopper is fixedly connected to the top of the shell, a magnetic separation assembly is arranged at the top of the shell, and a collecting assembly is arranged at the bottom of the magnetic separation assembly. The magnetic separation assembly comprises a first supporting frame, an electromagnet, a second supporting frame, a power supply mechanism and a power receiving mechanism. The electromagnets located at the top of the raw materials can be in butt joint and powered on, then a large-range magnetic field is formed, when the raw materials pass through the magnetic field, metal impurities can be attracted to the electromagnets under the magnetic effect more sufficiently, and new electromagnets can be continuously replaced in the process that the multiple electromagnets are driven by the transmission belt through the installation base to rotate circularly. Therefore, the adverse effect on the subsequent adsorption effect due to the fact that metal impurities are adsorbed on the electromagnet is avoided, the treatment quality of the metal impurities is ensured, metal impurity residues are further reduced, the finished product quality of plastic particles is improved, and the influence on equipment is reduced.

The invention belongs to the technical field of electrochemistry, and particularly relates to a method for strengthening electrolytic reaction efficiency through a programmable temperature gradient thermomagnetic effect. Specifically, a catalytic electrode comprising a plurality of Curie point materials which are arranged in a stacked manner is constructed, and when the catalytic electrode is heated to a corresponding temperature interval, each layer of material can sequentially show different magnetic properties, so that the reaction process is influenced. The Curie point characteristic of the material is utilized, continuously changing temperature fields are generated in different areas, and specific chemical reactions are selectively activated or inhibited in cooperation with magnetic field switching. The preparation method has the technical advantages that the electrolytic active membrane can be constructed on a plurality of micron-sized-thickness membrane electrode materials with different substrates, the catalytic activity of the membrane electrode material can be adjusted along with the temperature, and the membrane electrode material can be widely applied to the technical fields of electro-catalytic water decomposition, electrodialysis, electro-adsorption and the like.

The invention discloses an anti-electromagnetic interference full-view liquid crystal display screen module, which relates to the field of liquid crystal display modules, and comprises a display screen assembly, which comprises a display screen body, a frame part arranged in the display screen body, and a main structure shielding bag arranged in the frame part; the shielding assembly comprises an electromagnetic shielding part arranged in the frame part, a special-shaped diamagnetic part arranged in the electromagnetic shielding part and a diamagnetic film part arranged on the outer side of the frame part; the opening and closing assembly is used for adjusting the position between the electromagnetic shielding component and the frame component, the structure enables the ends of the multiple special-shaped anti-magnetic strips to be folded towards the main structure shielding bag, so that the anti-magnetic performance is enhanced, when electromagnetic interference is light, the special-shaped anti-magnetic strips achieve anti-magnetism through the structures of the special-shaped anti-magnetic strips, and according to the difference of the electromagnetic interference, the anti-magnetic performance is improved. When the sliding plate slides, different sliding depths of the sliding plate can be affected, so that the sliding length of the movable strip is controlled, the rotating angle of the special-shaped anti-magnetic strip is affected, and different anti-magnetic effects are achieved.

The present invention relates to the technical field of energy harvesting equipment, and provides a continuous vibration energy harvesting device. The continuous vibration energy harvesting device comprises a shell, a coil skeleton is provided inside the shell, and the two ends of the coil skeleton are elastically connected to the shell by springs. A magnet is provided in the coil skeleton, and the two ends of the magnet are fixedly connected to the shell. A first coil and a second coil are wound around the outer sides of the two ends of the coil skeleton, and two piezoelectric film assemblies are provided on opposite sides of the coil skeleton. Each piezoelectric film assembly includes two piezoelectric films arranged at intervals, and the two piezoelectric films are electrically connected to the first coil and the second coil respectively. The continuous vibration energy harvesting device provided by the present invention can combine the piezoelectric effect and the electromagnetic effect to perform vibration energy harvesting, effectively improving the energy conversion efficiency and the power output efficiency.

A kind of eddy current testing probe and method for identifying any crack and direction around hole, the probe includes a pie-shaped detection coil with middle magnetic core, the magnetic core not only ensures accurate positioning, but also uses magnetic collection effect by enhancing coil inductance, to strengthen the magnetic field inside and back of hole.The probe is also equipped with three layers of excitation coil, one layer and two layers of coil are arranged orthogonally, three layers and one layer of coil are at an angle of 135 °, realize the efficient detection of any direction crack and identify the direction of any crack defect.The flexible support of probe enables it to adapt to curved surface structure, widen the application range.The detection method uses orthogonal differential technology, uses the symmetry of hole structure to identify defects around hole, significantly improve the detection sensitivity of defects on the back and inside of hole structure.Compared with traditional surface and near-surface defect eddy current testing technology, the present application provides a more effective solution for high-precision detection of hole structure through innovative coil configuration and defect identification method.

The present invention relates to the technical field of faucets, and discloses a magnetic faucet with high stability, including a faucet body, a magnetic head is installed on the upper side of the faucet body, a round sleeve is rotatably arranged on the upper side of the faucet body near the connection of the magnetic head, a Y-shaped frame is fixedly arranged at the front end of the round sleeve, a magnetic sheet is fixedly arranged at the front end of the lower side of the Y-shaped frame, a sleeve is fixedly arranged at the front end of the upper side of the Y-shaped frame, a movable box is slidably arranged on the inner side of the sleeve, two groups of reset springs are fixedly arranged between the movable box and the inner wall of the rear side of the sleeve, three groups of movable openings are opened at the bottom of the sleeve, and the inner wall of one side of the middle group of the three groups of movable openings is arranged as a rack, and a support frame is fixedly arranged at the bottom of the inner side of the movable box. The magnetic faucet with high stability described in the present invention can wipe the surface contacted by the magnetic head through the coordinated use of the whole, thereby improving the surface cleanliness of the magnetic head and the magnetic effect with the magnetic sheet.

The invention discloses a friction-free spring type safety valve, belongs to the field of pressure vessel protection, and aims to solve the problem of large friction force of a large-diameter valve rod of a steam extraction pipeline of a steam turbine. Comprising an upper guide assembly and a lower guide assembly, the upper guide assembly comprises a second permanent magnet ring, the lower guide assembly comprises a first permanent magnet ring, the upper portion of a valve rod assembly is sleeved with an upper magnetic ring, the lower portion of the valve rod assembly is sleeved with a lower magnetic ring, and the first permanent magnet ring, the second permanent magnet ring, the lower magnetic ring and the upper magnetic ring are all axially magnetized magnetic rings. The upper magnet ring and the lower magnet ring are arranged in a homopolar opposite mode, the polarity directions of the upper magnet ring and the second permanent magnet ring are the same, the upper magnet ring and the second permanent magnet ring form a magnetic action gap, the polarity directions of the lower magnet ring and the first permanent magnet ring are the same, and the lower magnet ring and the first permanent magnet ring form a magnetic action gap. The radial magnetic effect resultant force of the second permanent magnet ring on the upper magnetic ring points to the axis of the upper guide assembly, the radial magnetic effect resultant force of the first permanent magnet ring on the lower magnetic ring points to the axis of the lower guide assembly, and the friction force of the valve rod assembly is zero.

The invention discloses a comprehensive tester of multiple magnetic fields based on Arduino. The Arduino single-chip microcomputer, a Hall sensor and other devices are adopted to develop a comprehensive experimental instrument capable of measuring multiple magnetic fields. Based on the understanding of different magnetic field measurement methods and the integration of relevant experimental equipment, the measurement experiments of a constant magnetic field, an alternating magnetic field and a geomagnetic field are combined to reflect the difference among the constant magnetic field, the alternating magnetic field and the geomagnetic field in electromagnetic effects, measure the size and direction of the magnetic field, and help students recognize and understand the distribution of the magnetic fields of a current-carrying circular coil and a Helmholtz coil, as well as the size of the component of the geomagnetic field parallel to the ground.

A power contactor comprising a fixed part and a movable part translated relative to the fixed part in a displacement direction between a contact position forming a normally closed rest position of the contactor and a cut-off position driven by a linear actuator (12), the displacement of the movable part driving a movable contact (24) to move, the invention relates to a linear actuator (10) having a movable portion (12), which is separated from opposing fixed contacts (26) in an arc extinguish chamber (22) while compressing a contact pressure spring (28) and a core return spring (30), characterized in that the movable portion is rebounded in order to prevent any rebound during the return of the linear actuator to its rest position. The magnetic effect holding member fixes the movable portion in the contact position before the movable portion rebounds due to the spring action.

The invention relates to an anti-magnetic optical isolator, comprising an isolation core tube, an isolator inner sealing tube and an isolator outer sealing tube. The inner wall of the isolator inner sealing tube is inlaid with a magnetic ring, which is sleeved with the isolation core tube; both ends of the isolator outer sealing tube are provided with external fixed tubes, the insides of the two external fixed tubes are respectively threaded with an input alignment plug and an output alignment plug, the input alignment plug and the output alignment plug are both provided with alignment unit needles, and the two alignment unit needles are horizontally arranged corresponding to both ends of the isolation core tube; the outer sleeve of the alignment unit needle is sleeved with an airbag sealing plug, the airbag sealing plug is sleeved with the isolator inner sealing tube, the inner ends of the input alignment plug and the output alignment plug are both provided with a compression gasket, the compression gasket is matched with the airbag sealing plug and is pressed, the inside of the airbag sealing plug is filled with inert gas, an anti-magnetic coil is provided between the two external fixed tubes, and the anti-magnetic coil is wound around the surface of the isolator outer sealing tube. The design has good anti-magnetic effect and is not easily disturbed by external magnetic fields.

The invention discloses a multifunctional magnetic field and Ampere force measurement comprehensive experimental instrument, including a base, an electronic scale bracket fixedly arranged at the left end of the upper end surface of the base, an electronic scale fixedly arranged at the upper end of the electronic scale bracket, a square wire frame arranged at the upper end of the electronic scale pan, a square wire frame bracket arranged in the middle of the square wire frame, a square wire frame plane nail fixedly arranged at the left end of the square wire frame, a current-carrying circular coil, a Hall sensor and a Hall sensor lead connector fixedly arranged at the left and right ends of the square wire frame, a radial slide arranged at the lower end of the Hall sensor lead connector, a radial rotating drum wheel and a radial guide rail arranged at the lower end of the radial slide, and a transverse slide arranged at the lower end of the radial guide rail. The above technical scheme combines the measurement experiments of constant magnetic field and alternating magnetic field, reflects the difference between constant magnetic field and alternating magnetic field in electromagnetic effect, helps students recognize and understand the magnetic field distribution of current-carrying circular coil and Helmholtz coil, has reasonable structural design, is easy to use, and has good inventiveness.

The utility model discloses a biological membrane coupled magnetic field reinforced artificial wetland device, which belongs to the technical field of artificial wetlands and comprises a shell, a biological membrane unit, an artificial wetland unit and an adsorption unit which are sequentially arranged in the shell from left to right. A water inlet pipe and a water outlet pipe are formed on the two sides of the shell respectively, a magnetic strengthening assembly is arranged in the constructed wetland unit, and the magnetic strengthening assembly comprises a permanent magnet, an electromagnetic coil and an electromagnetic generator. The device disclosed by the utility model has the beneficial effects that the device is connected to sewage and wastewater to be treated, efficient nitrogen and carbon removal can be realized through the multi-stage effect of cooperative treatment of the biological membrane unit, the constructed wetland unit and the adsorption unit, and meanwhile, the adjustable magnetic field strengthening assembly is arranged in the device, so that the device is more stable and reliable. The growth and metabolism of microorganisms can be promoted through an adjustable magnetic effect, and the pollutant removal efficiency of the system is further improved.

The invention discloses an eye care product combining a magnetic therapy technology and a warm and hot compress function, which comprises a product body, the product body is an elastic eyeshade structure, and an eye care structure is arranged on the product body; the eye nursing structure comprises a magnetic therapy structure used for generating a magnetic field and a hot compress structure used for heating. By means of the mode, the eye care product combining the magnetic therapy technology and the warm and hot compress function is provided with an eye care structure, hot compress and acupuncture point magnetic acupuncture can be conducted on eyes, eye fatigue is relieved through the magnetic effect and the warm effect, and the eye function is improved.