2646 results about "Magnet coil" patented technology

The invention discloses an automatic bending and tin immersion device and method based on electromagnetic coil pins, and the device comprises a loading turntable structure which is provided with a controllable rotary turntable surface and a plurality of groups of electromagnetic coil stations; the loading and unloading carrying structure is arranged corresponding to the loading turntable structure; the pin bending structure is used for outputting stamping kinetic energy to bend electromagnetic coil pins; the soldering-aid dipping structure comprises a soldering-aid shifting and transposition assembly and a soldering flux lifting assembly, the soldering-aid shifting and transposition assembly is provided with a transposition kinetic energy output end, and the soldering flux lifting assembly is provided with a soldering flux lifting end; the pin tin immersion structure comprises a tin immersion transfer assembly and a tin melting liquid storage assembly. And the impedance detection structure comprises an upper and lower limit alarm resistance meter and a test probe, and can be arranged corresponding to the plurality of groups of electromagnetic coil stations in a switchable manner. The problems that in the prior art, bending and tin immersion processes of electromagnetic coil pins generally depend on manual operation, so that the overall automation degree, the operation efficiency and the qualified rate are low, and the labor cost is high are solved.

The invention is suitable for the technical field of geophysical exploration, and provides a ground-air transient electromagnetic airborne receiving coil motion noise extraction method, which comprises the following steps: designing a receiving device carrying an IMU (Inertial Measurement Unit) sensor, the receiving device comprising a receiving coil, the IMU sensor and a synchronous clock; measuring a vector geomagnetic field in a transient electromagnetic detection area based on attitude angle data of the receiving device; and extracting the motion noise of the airborne transient electromagnetic coil based on the vector geomagnetic field and the attitude angle data. The invention designs a ground-air transient electromagnetic receiving device, and provides a method for extracting motion noise of an airborne receiving coil based on the ground-air transient electromagnetic receiving device, so that the problem that the motion noise is generated due to the fact that the coil cuts a geomagnetic field is effectively solved. Compared with a mode of directly separating the motion noise from the induced electromotive force signal, the method provided by the invention can directly extract the motion noise from the generation mechanism level of the motion noise, and effectively avoids the problem of incomplete noise extraction or target signal loss.

The invention discloses an intelligent electromagnetic induction heating method and system for multi-parameter collaborative frequency domain separation, and provides a synchronous parameter acquisition and frequency domain separation processing scheme for solving the problems of temperature detection lag, insufficient frequency domain interference processing and weak dynamic adaptation capability in the prior art. Transient current, voltage and change rate (a first parameter group) of an electromagnetic coil are synchronously acquired, and high-frequency fluctuation (greater than or equal to 10kHz) and low-frequency disturbance (1t, 1t) are converted into low-frequency fluctuation (greater than or equal to 10kHz) by combining environment temperature, cookware materials and user preferences (a second parameter group); 10kHz) is used for frequency spectrum separation. Phase difference features are extracted through band elimination filtering and FFT, heating priorities are corrected in combination with dynamic compensation factors, and a segmented heating curve is generated through time-frequency domain weighted fusion. And the system adjusts PWM parameters in real time, and triggers adaptive protection when detecting that the phase is abnormal or the power frequency exceeds the limit. According to the method, the limitation of single-frequency-band detection is broken through, high-frequency noise suppression and low-frequency disturbance compensation are realized, and accurate temperature control of ferromagnetic / non-ferromagnetic cookware is supported.

The invention discloses an intelligent monitoring system for an assembled net rack shear structure, and relates to the technical field of net rack structure health monitoring. A fiber grating sensor, an ultrasonic array, an electromagnetic coil and an energy assembly are integrated through a sensor integration module and a modular support; optical fiber strain, ultrasonic signals and electromagnetic impedance data are collected in real time; after the feature fusion module extracts key features through preprocessing, a fusion feature vector is obtained through an adaptive manifold projection fusion method; the shear force value prediction module takes the fusion feature vector as input, and obtains a shear force value prediction model through training by using an LSTM (Long Short Term Memory) model; and the net rack judgment module is combined with a DBSCAN algorithm to divide neighbor sensor network groups, and is used for judging the structure defect type based on a local anomaly concentration ratio LAC and an overall cooperative change rate GCR. According to the system, intelligent monitoring of the fabricated net rack shear structure is realized, and the monitoring precision and the defect identification accuracy are improved.

The invention belongs to the technical field of shock insulation supports, and particularly relates to a composite thick laminated rubber shock insulation support with self-adaptive damping, a shock insulation method of the composite thick laminated rubber shock insulation support and an intelligent fluid preparation method. According to the technical scheme, the composite thick laminated rubber shock insulation support with the self-adaptive damping function comprises an upper connecting steel plate and a lower connecting steel plate, a steel plate layer, a rubber layer, a pressure sensing layer and a sensor network layer are arranged between the upper connecting steel plate and the lower connecting steel plate, and a plurality of fluid cavities communicated through pipelines are formed in the rubber layer; the pressure sensing layer is provided with an electromagnetic coil, a piezoelectric driving unit and a valve body, the valve body is connected with the fluid cavity through a guide pipe, the electromagnetic coil is arranged on the valve body in a sleeving mode, and the electromagnetic coil and the valve body are electrically connected with the piezoelectric driving unit. The invention provides a composite thick laminated rubber shock insulation support with self-adaptive damping, a shock insulation method of the composite thick laminated rubber shock insulation support and an intelligent fluid preparation method, and the composite thick laminated rubber shock insulation support has intelligent sensing and self-adaptive adjusting functions and can keep long-term stability.

The invention relates to the technical field of low-voltage electric appliances, in particular to a magnetic flux release, an isolating switch and a power supply system. The electromagnetic coil is installed on the support, and the ejector rod is inserted into the electromagnetic coil in a sliding mode. In the electromagnetic coil, at least two movable iron cores which are arranged at intervals in the axial direction are arranged on the ejector rod; when the electromagnetic coil is powered on, at least one movable iron core moves in the axial direction of the ejector rod and drives the ejector rod to move. According to the embodiment of the invention, at least two movable iron cores are arranged in the magnetic flux release, so that differentiated response can be realized for different faults.

The invention relates to the technical field of electromagnetic coils, in particular to a laminated special-shaped plane spiral coil winding. The laminated special-shaped planar spiral coil winding is composed of at least two coil layers, and each coil layer is composed of a single special-shaped planar spiral coil. The inner ring part of the special-shaped plane spiral coil is a concentric plane spiral coil, and the outer ring part of the special-shaped plane spiral coil is a tooth-shaped spiral coil extending along the outer periphery of the concentric plane spiral coil; all phases of the coil winding are different in layer, the electrified magnetic field center of each coil layer deviates from the geometric center, and the projection of the magnetic field center of each phase in the plane of the coil winding is in central symmetry distribution. The invention innovatively provides a laminated special-shaped planar spiral coil winding, and provides a squirrel-cage equivalent rotor on the basis of the laminated special-shaped planar spiral coil winding, so as to provide competitive choices for reducing copper loss and improving heat dissipation, magnetic conductivity, structural strength and economic cost of an axial flux motor winding.

The invention relates to the technical field of excavator bucket rods, and provides a bucket rod composite damping device and an excavator. The device comprises a shell composed of a base, an outer shell and a stress shell; the magneto-rheological buffer device is installed in the shell and composed of a lattice structure made of magneto-rheological elastomer materials and magneto-rheological fluid filled in gaps corresponding to the lattice structure, and a plurality of sound absorption holes are formed in each cell element wall in the lattice structure; the electromagnetic device is located in a containing cavity formed in the lattice structure and is composed of a magnetic core and an electromagnetic coil; the anti-vibration pad and the stress plate are embedded in the top of the shell and are in contact with the stress plate; the damping springs are arranged on the periphery of the shell and fixedly connected between the stress plate and the base; the vibration monitoring module is used for collecting vibration data of the bucket rod in real time and transmitting the vibration data to the intelligent control module, and the intelligent control module is used for adjusting the output magnetic field intensity of the electromagnetic coil according to the vibration data so as to adjust the viscosity of the magnetorheological fluid in real time.

The invention provides a method and a system for measuring plasma current in a quasi-ring symmetrical star simulator, and relates to the technical field of star simulators, and the method comprises the steps: determining a sensor design index according to a bootstrap current simulation calculation result, and converting the design index into an actual arrangement scheme according to an installation environment constraint; all the magnet coils are independently excited in a plasma-free state, wall eddy current interference signals generated by the magnet coils are calibrated, and thus wall eddy current calibration voltage signals are output; a sensor in an actual arrangement scheme is used for synchronously collecting a total original induced voltage signal including plasma current and wall eddy current; an integral voltage signal representing the total current is output; and compensating the integral voltage signal by using the wall eddy current calibration voltage signal, and inverting the final measurement value of the plasma current in the quasi-ring symmetric star simulator. The device and the method have the beneficial effects that the interference of a stray field on a measurement result is weakened, and a high-precision diagnostic tool is provided for the plasma physical research of the star simulator.

The invention discloses a magnetic suspension non-contact driving self-balancing precision machine core which comprises a metal disc, a magnetic suspension assembly is arranged at the top of the metal disc, a connecting assembly is arranged on the magnetic suspension assembly, a pluggable stable supporting assembly is arranged on the metal disc, the magnetic suspension assembly comprises a Halbach annular permanent magnet array and an electromagnetic coil, and the Halbach annular permanent magnet array is connected with the connecting assembly. The Halbach annular permanent magnet array is installed at the top of the metal disc, and the electromagnetic coil is installed at the top of the metal disc and located in the Halbach annular permanent magnet array. Through composite magnetic suspension driving of the Halbach annular permanent magnet array and the electromagnetic coil, no mechanical contact exists between the suspender and the metal disc, the friction loss of traditional gear meshing is eliminated, no lubrication requirement exists, the problem of lubricating grease volatilization or aging is avoided, the stable supporting assembly is controlled through a pressure sensor and an electric push rod in a closed-loop mode, and the stability of the stable supporting assembly is improved. The height of the supporting column is adjusted in real time, so that the whole device is in a horizontal state, and the magnetic suspension system is not affected by inclination of a mounting plane.

The invention discloses a pilot head assembly and an electromagnetic valve, and relates to the technical field of electromagnetic valves.The pilot head assembly comprises a shell sleeve, an inner cavity of the upper end of the shell sleeve is fixedly connected with a first fixed iron core, and the position, corresponding to the first fixed iron core, of the outer wall of the shell sleeve is sleeved with a first electromagnetic coil; the lower end of an inner cavity of the shell sleeve is fixedly connected with a second fixed iron core, the position, corresponding to the second fixed iron core, of the outer wall of the shell sleeve is sleeved with a second electromagnetic coil, and a movable iron core piston seat is movably connected to the bottom of the shell sleeve in an inserted mode. Through cooperative control of the double-electromagnetic-coil structure and the rotating ratchet mechanism, stepless switching of the electromagnetic valve between the normally-open state and the normally-closed state is achieved, the stroke of the sealing plug can be accurately positioned through the limiting clamping groove of the ratchet sleeve under the action of different electromagnetic fields, mode switching can be completed without an external mechanical device, and the working efficiency is improved. The problem that switching of a traditional electromagnetic valve needs a complex external device is solved.

The invention relates to the technical field of electromagnetic coils, in particular to a laminated planar spiral coil winding. The laminated planar spiral coil winding is formed by laminating at least two layers of planar spiral coils, the spiral center fitting line formed by each turn of wire is linear, the planar spiral coils occupy the whole winding plane, the strong magnetic center deviates from the geometric center of the planar spiral coils, and the phases of the winding are different in layer. The invention aims to provide competitive choices for the axial flux motor winding, such as high copper full rate, low copper loss, large air gap, easy heat dissipation and low production cost.

The invention relates to the technical field of coating testing devices, and particularly discloses an induction cooker glass ceramic functional coating testing device which comprises a base and a detection box located on the base, a detection cavity is formed in the detection box, a testing table is arranged in the detection cavity, and the testing table comprises a testing execution mechanism and a testing placement seat; the test execution mechanism comprises a friction disc, an electromagnetic coil is arranged in the friction disc, and a groove which is spirally distributed is formed in the bottom of the friction disc; the test placement seat comprises a loading table of which the middle of the top is provided with a to-be-tested coating panel in a position corresponding to the friction disc, the periphery of the top of the loading table is provided with a convex check ring, the upper part of the convex check ring is provided with a nozzle corresponding to the to-be-tested coating panel, and the nozzle is communicated with a storage tank arranged at the bottom of the loading table through a pressurizing pipeline; a magnetorheological abrasive is stored in the storage tank; the device has the advantages of high test precision and real test simulation.

The invention discloses a core shooter with a quick mold changing structure and a matched core box, and relates to the technical field of mold manufacturing. A core shooter movable plate is provided with a seam allowance groove and an electromagnetic coil, a core box upper mold is provided with a seam allowance boss with a permanent magnet, and three-stage magnetic coupling control is achieved through a control system, specifically, during mold closing, homopolar repulsive force guiding is conducted to avoid collision, during positioning, heteropolar attraction force locking is conducted, and during mold changing, homopolar repulsive force pushing separation is conducted. And three-dimensional accurate positioning and mechanical redundancy locking are formed by a clamping jaw clamping mechanism driven by a double-acting oil cylinder under the assistance of taper fit of right-angle limiting grooves in the four corners of the supporting plate and positioning blocks of the fixing plate. Through magnetic coupling automatic guiding and mechanical cooperative clamping, the mold changing time is shortened to be within 2 minutes from 30-40 minutes, single-person operation is achieved, the positioning precision and the vibration resistance are improved, the labor intensity is remarkably reduced, and the mold changing device is suitable for efficient and continuous production in the casting industry.

The invention relates to the technical field of X-ray tube control, and discloses a control method and device for a controllable flying focus X-ray tube, and the method comprises the steps: building an orthogonal electromagnetic deflection system based on an electron beam flight path of the X-ray tube, and the orthogonal electromagnetic deflection system comprises an X-direction electromagnetic coil and a Y-direction electromagnetic coil; creating a conversion relation for converting the target focus position function into an electromagnetic coil current value; executing nonlinear magnetic field response compensation to obtain high-speed switching control signals of the X-direction electromagnetic coil and the Y-direction electromagnetic coil; and performing focus trajectory prediction based on the high-speed switching control signal to obtain a focus motion trajectory formed by the electron beam on the target material, and performing thermal load distribution optimization on the focus motion trajectory to obtain a focus position control scheme for uniform distribution of the surface temperature of the target material. Accurate positioning control of the electron beam on the target material is achieved, and the X-ray imaging quality is improved.

The present application is drawn to a system and method, as well as method for manufacture of a device and system for determining the position and orientation of at least one magnetic field sensor comprising: a rigid structure comprising an array of at least five electromagnetic coils; at least one wire that connects to and powers the electromagnetic coils; wherein the placement and orientation of the electromagnetic coils on the rigid structure are predetermined; wherein the electromagnetic coils, each having a predefined magnetic moment per unit current, are constructed with a printed circuit board (PCB) comprising at least one conductive layer; and wherein the system is configured such that a stray magnetic field emanating from the at least one, as measured at the location of the at least one magnetic field sensor, generates substantially lower magnetic field intensity than that produced by each of the at least five electromagnetic coils.

The utility model relates to the technical field of fusion reactors, in particular to a magnetic confinement fusion device with a low-temperature magnet, which comprises a magnet shell, a magnet coil arranged in the magnet shell and an outer Dewar arranged outside the magnet shell, a fixed supporting structure is arranged between the outer end face of the second end of the magnet shell and the inner end face of the outer Dewar, and one end of the magnet shell is fixed to the outer Dewar. A gap is formed between the first end part and a first outer Dewar fixing block fixed on the outer Dewar in the radial direction, the first end part is connected with a first magnet shell fixing block positioned on the first end part through a first bolt, one end of the first bolt is fixedly connected, and the other end of the first bolt can move freely. When the magnet shell deforms, the magnet shell can adapt to radial and axial expansion / contraction deformation of the first end part, the stress applied to the outer Dewar due to the deformation of the magnet shell caused by the temperature change of the magnet coil is reduced, and the safety of connection between the magnet shell and the outer Dewar is improved.

The utility model relates to the technical field of power split hybrid transmissions, in particular to an electromagnetic brake device for locking a generator shaft, which comprises a cylindrical brake sleeve seat capable of movably sleeving an input shaft of an engine, and an electromagnetic coil assembly mounting position, a push disc mounting position and a driven disc mounting position are arranged on the surface of the brake sleeve seat. The electromagnetic coil assembly mounting position is sleeved with an electromagnetic coil assembly, the driven disc mounting position is sleeved with a driven disc, and a push disc is movably arranged on the push disc mounting position; a disc spring is arranged on the side, facing the driven disc, of the push disc, and an iron core in the electromagnetic coil assembly can act on the push disc to enable the push disc to move towards the driven disc and be connected with the driven disc in a clamped mode. The outer end face of the driven disc is provided with an output disc capable of being connected with a generator shaft in a sleeved mode. Compared with other types of locking mechanisms, the electromagnetic braking device has the advantages that the change amount of the vehicle is small, the structure is simple and compact, the control logic is simple, and the control effect is good.

The invention relates to a coal mine gas extraction drill hole gas leakage detecting and positioning device in the field of coal mine rock stratum drilling, through a front sliding cylinder provided with a first controllable air bag and a rear sliding cylinder provided with a second controllable air bag, and through cooperation with a magnet ring and an electromagnetic coil, a detection mechanism efficiently walks in an extraction drill hole, and the detection accuracy is improved. Walking detection in extraction drill holes with different inclination angles is facilitated; meanwhile, a first sound wave positioning sensor and a second sound wave positioning sensor are utilized, so that the detection mechanism quickly gets close to the leakage opening, the section-by-section detection mode of a traditional detection device on the extraction drill hole is replaced, and the detection efficiency is improved; besides, the leakage port is rapidly positioned through a first infrared distance sensor arranged opposite to the storage mechanism, the problem that the positioning precision is not high due to the fact that a traditional detection device uses the cable release amount to position the position of the leakage port is solved, and the positioning precision is improved.

The invention discloses a method for rapidly predicting the shape stability of a bird body emitted by a multistage electromagnetic coil, and the method comprises the steps: 1, inputting a structural parameter and an electrical parameter according to a bore-out speed requirement; 2, establishing a prediction model of the multistage electromagnetic coil transmitting device according to the parameters in the step 1; step 3, carrying out iterative calculation by adopting a forward difference method to obtain bird jerk after the cartridge case armature passes through the current-stage driving coil; 4, the bird body deformation stability in the current-level launching process is judged; 5, judging whether the armature displacement of the cartridge case meets the requirement or not, and if not, performing iteration at the current stage; if yes, executing the step 6; 6, setting the current, the mutual inductance and the mutual inductance gradient to be 0, and repeating the step 3 to carry out emission iterative calculation of the next-stage electromagnetic coil; 7, repeating the steps 4-6 until the prediction model reaches a preset out-of-bore speed; and step 8, outputting the final acceleration, displacement, speed and bird jerk curve of the cartridge case armature.

The utility model discloses a wok, including a plurality of wok bodies, a transmission shaft, a stirring motor and an electromagnetic coil in a vertical direction, wherein the bottom of each wok bottom is provided with an electromagnetic coil, adjacent wok bodies are fixedly connected by a connecting plate, a feed port and an exhaust port are provided on the top of each wok body, a discharge port is provided on the side wall of each wok body, the feed port of each wok body is connected with the discharge port of the adjacent wok body through a feed pipe, and each exhaust port is connected with an exhaust pipe; the transmission shaft vertically penetrates each wok body and is connected with the stirring motor by transmission, and a wok scraper is provided on the transmission shaft in each wok body. The utility model effectively solves the safety hazard of the existing wok body mainly heated by steam, each layer of the wok body of the wok is heated by an electromagnetic coil, and the space between two adjacent layers of the wok body is hollowed out, which ensures good ventilation and heat dissipation, and ensures that the bottom of the wok will not be deformed due to heat, thereby ensuring the transmission of the transmission shaft.

The invention belongs to the technical field of automobile shock absorber electromagnetic valves, and particularly relates to a hydraulic shock absorber electromagnetic valve for vehicle testing, which controls whether a liquid inlet hole is directly communicated with a main liquid cavity or not through an elastic valve plate, and controls whether the main liquid cavity is communicated with a liquid outlet hole or not through a pressurizing seat. The pressure of oil entering the liquid inlet must overcome the tension of the elastic valve block, the supporting force of the elastic supporting piece can push the elastic valve block and the pressurizing base to move in the direction away from the main valve body, then the oil can flow back to the shock absorber through the liquid outlet hole, and the resistance borne by the oil in the electromagnetic valve is increased. And large damping force is provided for the vibration damper. By arranging the pressurizing cavity, when the electromagnetic coil is powered on, the pilot valve element blocks the overflow hole, oil in the overflow hole applies pressure to the pressurizing base, the oil does not easily push away the pressurizing base and the elastic valve block in the direction away from the main valve body, and oil resistance is further increased. The electromagnetic valve consumes less electric energy, and the vehicle research and development test efficiency is improved.

The invention discloses an intelligent ring and a health monitoring method and a charging method thereof, and relates to the technical field of intelligent wearable device.The intelligent ring comprises a ring body, the ring body comprises an inner ring, a rechargeable battery, an outer ring and a master controller, and the periphery of the inner ring is provided with the rechargeable battery, a plurality of charging coils electrically connected with the rechargeable battery and a health monitoring module; the main controller is electrically connected with the rechargeable battery; the outer ring is arranged outside the inner ring in a sleeving mode and matched with the inner ring in a sliding contact mode, a plurality of magnets are arranged on the inner circumference of the outer ring in the circumferential direction at intervals, and the magnetic poles of any two adjacent magnets are opposite. Through cooperation of the charging coil and the magnet, charging is carried out through rotation of the outer ring, the endurance of the intelligent ring is prolonged, meanwhile, through cooperation of the charging coil and the electromagnetic coil, wireless charging of the intelligent ring without external contact points is achieved, and the service life of the intelligent ring is prolonged.

The invention provides an electromagnetic driving device and a robot system, and relates to the technical field of medical surgery, and the electromagnetic driving device comprises an electromagnetic driving unit and a control unit. The electromagnetic driving unit serves as an execution unit and comprises a positioning frame, an adjusting assembly connected with the positioning frame and an electromagnetic coil assembly connected with the positioning frame and the adjusting assembly. The control unit comprises a master controller and a coil angle controller electrically connected with the master controller. On the basis, the coil angle controller is electrically connected with the adjusting assembly and used for adjusting the angle between the electromagnetic coil assembly and the positioning frame through the adjusting assembly so as to adjust the magnetic field direction of the electromagnetic coil assembly and drive the magnetic micro-robot to move, and therefore the magnetic micro-robot is driven to move in the human body to complete different medical functions.

The invention discloses a spring-free magnetic springback type switch key, which comprises a shell, a shaft rod inserted into the shell, a magnetic column arranged in the shaft rod, an electromagnetic coil positioned in the shell and arranged outside the shaft rod in a surrounding manner, and a trigger assembly mounted in the shell and matched with the shaft rod, the shaft rod is provided with a hollow column body extending downwards, and the magnetic column is located in the hollow column body; an annular wall is arranged on the inner bottom face of the shell in an upward protruding mode, a guide groove matched with the hollow column in the shaft rod is formed, and the guide groove is used for conducting linear guiding on relative matching of the hollow column. And the electromagnetic coil is sleeved outside the ring wall. According to the switch key, the electromagnet is matched with the magnet, rebounding of the key is achieved through magnetic force, and the intensity of feedback force is flexibly changed by adjusting the magnetic force of the electromagnet.

The invention discloses a shunt release of a circuit breaker, and belongs to the technical field of circuit breakers, the shunt release comprises a base, a quick release mechanism, a soft start mechanism and a movable iron core, the two sides of the base are provided with mounting bolts, the mounting bolts are used for fixing the base, the top of the base is provided with an adjusting seat, the two sides of the adjusting seat are connected with the base through connecting bolts, and the adjusting seat is connected with the base through connecting bolts. The top of the adjusting seat is provided with a quick release mechanism, the quick release mechanism is internally provided with an electromagnetic controller, and the electromagnetic controller is internally provided with an electromagnetic coil. The device has the beneficial effects that an adjusting bolt in a compensation mechanism is rotated, the adjusting bolt drives a sliding block to move, and the sliding block moves to further drive a push plate to move; the push plate pushes the other end of the reset spring, so that the reset spring is extruded additionally, the elasticity of the spring is compensated, and the problem that the reset speed of the pull rod is decreased due to elasticity attenuation of the reset spring is effectively solved.

The present invention discloses a protective short-circuit-proof relay, comprising a base, a side plate is provided on one side of the top of the base, and a shell is connected between the other side of the top of the base and the side plate, an electromagnetic coil is installed on the top of the base, and a bracket is installed on the top of the base between the electromagnetic coil and the shell, a horizontal plate is rotatably connected to the bracket, and an armature is connected to the horizontal plate. In the protective short-circuit-proof relay, when the electromagnetic coil is energized and the armature is attracted to drive the moving contact to approach the second static contact, the second connecting piece moves downward in the cylinder body through the sliding rod pressed by the shifting frame, so that the cylinder body discharges air downward through the narrower first opening on the opening plate. Since the diameter of the first opening is limited, the exhaust effect is limited, thereby playing a buffering effect, thereby avoiding the rapid collision when the moving contact contacts the second static contact, which causes crack damage to the contact over a long period of time, thereby extending the service life.

The invention discloses a rotary clamping tool clamp for a numerical control machine tool, and relates to the technical field of numerical control machining, the rotary clamping tool clamp comprises a machine tool body, a working table for placing a workpiece is arranged in the machine tool body, and a clamping plate for clamping the workpiece is arranged on the upper side of the working table. According to the rotary clamping tool clamp for the numerical control machine tool, the sliding rod can move under the abutting action of the abutting groove, the sliding rod slides towards the center of the working table top under the limiting action of the sliding groove, and therefore a workpiece is clamped and limited, and the situation that the machining effect is affected due to the fact that the position of the workpiece deviates during machining is prevented; when the machine tool body rotates, an annular magnetic field can be generated, at the moment, a magnetic block interacts with a magnetic field of an electromagnetic coil to drive a swing frame to periodically swing along the outer side of a limiting shaft, a knocking hammer knocks a vibration piece to transmit vibration force to the inner wall of the machine tool body, and therefore splashing waste chips are prevented from being attached to the inner wall of the machine tool body.

A robotic medical device system for performing an operation on a patient includes a magnetic field source configured to generate a first magnetic field, an electrical current source configured to generate one or more selective electrical currents, and a micro robotic arm inserted within the patient. The micro robotic arm includes semi-flexible tubing configured to house a tool for performing the operation within the patient, and one or more joints formed in the semi-flexible tubing. Each of the joints includes a magnetic coil that is wrapped around the semi-flexible tubing. The magnetic coil is configured to receive one of the selective electrical currents generated by the electrical current source and generate a second magnetic field from the received one of the selective electrical currents. Each joint is configured to move the tool within the patient in accordance with an interaction between the first magnetic field and the second magnetic field.

The invention discloses a mechanism and data fusion driven low-voltage electromagnetic coil insulation residual life prediction method, and belongs to the technical field of power equipment state monitoring and predictive maintenance. The method comprises the following steps: firstly, constructing a creep finite element simulation model of the turn-to-turn insulating coating of the electromagnetic coil, and determining a creep quantity as an insulating health index with a clear physical meaning; then establishing a mapping relationship between electrical parameters such as high-frequency impedance and the like and creep variables, and realizing accurate trend prediction of the electrical parameters and the corresponding creep variables by adopting a lightweight deep learning model (Windows Mixer); and finally, fusing a failure threshold value determined based on a creep mechanism with a data-driven prediction result so as to improve generalization and accuracy of a prediction model. According to the invention, an intelligent prediction tool with high precision and low resource consumption can be provided for operation and maintenance of the electromagnetic coil.