276results about How to "Strong magnetic field" patented technology

This document discusses, among other things, an apparatus comprising a lacrimal implant insertable at least partially into a lacrimal punctum. The lacrimal implant comprises an implant core, and an implant body. The implant body includes a cavity sized and shaped to receive the implant core. At least one of the implant core and the implant cavity includes a detection device configured to allow automatic detection of the lacrimal implant with a separate detector device.

A permanent magnet synchronous machine with improved torque and power characteristics. A circumferential-oriented rotor assembly is provided with alternating permanent magnets and magnetic pole pieces. In order to reduce the amount of leakage flux in the rotor and increase the effective length of the permanent magnet, a trapezoidal or otherwise tapered permanent magnet structure is used. By alternating trapezoidal permanent magnet, and magnetic pole pieces, a higher intensity magnetic field is created in the air gap utilizing the same radial space in the motor without altering the weight or volume of the motor compared to conventional machines.

The invention discloses a mobile terminal with a rotation camera. The mobile terminal with the rotation camera comprises a terminal main body and a rotation camera component which is arranged at the top of the terminal main body and can rotate relatively to the terminal main body, wherein a Hall sensor is arranged at one end of the terminal main body, close to the rotation camera component, the Hall sensor is electrically connected with a central processing unit, a first magnet and a second magnet are arranged on a position in the rotation camera component, corresponding to the Hall sensor, the first magnet and the second magnet are bar magnets, a polarity of the first magnet and a polarity of the second magnet, which are the same, are oppositely arranged, and the first magnet, the second magnet and the Hall sensor are located on the same straight line under the circumstance that the rotation camera component is not rotated. The invention further discloses a camera angle control method of the mobile terminal with the rotation camera. By adopting the technical scheme, the mobile terminal with the rotation camera has strong magnetic field intensity, can effectively improve detection precision, and enables rotation angle detection to have good interference resistance.

A camera module that can be used in small-sized electronic apparatuses such as digital cameras, camera-equipped cellular phones and the like is provided. The camera module includes a lens unit which constitutes an optical system of the camera module; a holder which houses the lens unit and is displaceable along an optical axis direction of the lens unit; a coil provided on the holder, the coil being formed to have an octagon shape in its horizontal cross section having eight outside surface portions; a yoke having an outer cylindrical wall portion formed to have an octagon shape in its horizontal cross section which is similar to and larger than the octagon shape of the coil and having eight magnet mounting inner surfaces; eight flat plate-shaped magnets respectively provided on the magnet mounting inner surfaces of the yoke for providing a magnetic field to the coil in cooperation with the yoke, each of the eight flat plate-shaped magnets being arranged so as to face each of the outside surface portions of the coil through a predetermined constant spacing; upper and lower leaf springs respectively attached to upper and lower cylindrical end portions of the holder for supporting the holder so as to be displaceable along the optical axis direction of the lens unit; and a base for supporting the yoke and the lower spring.

A jewelry apparatus and process for holding an article to a person's clothing. A rare earth magnet is attached to one side of a piece of jewelry and connected with a chain or cord to a second rare earth magnet. The two magnets are magnetically held together through a person's clothing allowing eyeglasses or another article to be removably hung on the chain or cord.

The invention discloses an ion thruster discharge chamber magnetic pole structure which comprises a lower magnetic pole (1), a middle magnetic pole (2), an upper magnetic pole (3), a lower pole shoe (4), a middle pole shoe (5) and an upper pole shoe (6). The lower pole shoe (4), the middle pole shoe (5) and the upper pole shoe (6) are correspondingly connected with the lower magnetic pole (1), the middle magnetic pole (2) and the upper magnetic pole (3). The structure further comprises permanent magnets (9 and 10). A magnetic force line loop is formed among the magnetic poles through the pole shoes (4, 5 and 6) and the permanent magnets (9 and 10). A loop tip cusped magnetic field is formed in a discharge chamber. The structure is characterized in that positive pole cylinders (7 and 8) of the discharge chamber are arranged in the cusped magnetic field, all the magnetic poles extend to the inner surfaces of the positive pole cylinders (7 and 8) and are charged with negative electricity relative to the positive pole cylinders (7 and 8), and a discharge chamber negative pole (11) installed on the lower pole shoe (4) directly extends into the discharge chamber under the circumstance without the positive pole cylinders ahead. The invention further discloses a design method for the ion thruster discharge chamber magnetic pole structure. When the structure is used, the primary electron utilization rate can be increased, and the discharging efficiency and the beam uniformity are improved.

A dielectric resonator having variable cross-section, preferably varying monotonically, and, most preferably, the resonator being in the shape of a truncated cone. Such shapes displace the H11 mode from the TE mode in the longitudinal direction of the cone. Truncating the cone to eliminate the portion of the cone where the H11 mode exists, virtually eliminates the H11 mode. A circuit comprising a plurality of these resonators may be arranged in an enclosure with each resonator longitudinally inverted relative to adjacent resonator(s) to provide a compact design with enhanced coupling and adjustability. A spiral coupling loop provides high magnetic flux in a small physical volume for coupling energy into or out of the circuit. Alternately, the resonator can coupled to a microstrip by placing the resonator upside-down near the microstrip, whereby the TE mode is immediately above the microstrip, providing enhanced coupling there between.

The invention provides a magnetic grating displacement transducer based on a Hall magnetic sensitive element array. Magnetic steels with the same specification are arranged into a row and fixed onto a magnetic base to serve as a magnetic railing ruler, adjacent polarities of the magnetic steels are opposite, and six Hall magnetic sensitive elements are arranged into a row at equal intervals to serve as a magnetic head. A strong magnetic field can be obtained as the magnetic steels serve as the magnetic railing ruler, and the magnetic field is much stronger than general record magnetism. Moreover, by the aid of magnetic steel arrangement, the magnetic steels and arrangement modes can be replaced at any time, encoding and measuring length adjustment are facilitated. The Hall magnetic sensitive element array serves as the magnetic head, output signals can be linearized within a period by overlapping two curves with a certain angle of phase difference in the output signals of the six Hall elements and selecting different interpolating curves at different angles within the period, displacement calculation accuracy is improved, and the data processing procedure is simplified.

The utility model discloses a magneto-stretch sensor used for detection of ultrasound ultrasonic waveform, which belongs to the technical field of acoustic sensors. Bias magnetic circuit which is provided with a plurality of steel stranded wires (1), a jaw (2), a saddle (3), a permanent magnet (4) and a yoke iron (5) makes the magnetic field generated in the steel stranded wires (1) to rotate with the field biased along the direction of the magnetic field. The excitation signal issued by signal generator enter the first enameled wire (7) after being enlarged in a power amplifier. An alternating current magnetic field is produced by the stranded wires in an incentive-in solenoid sensor (6), the coordination of the bias magnetic field and the alternating magnetic field caused by the magnetic domain in the stranded wires are swung back and forth along the axial direction of the magnetic domain, and the change of the magnetic domain is received to the receiving end of the solenoid sensor. The signal is received to the oscilloscopes by a second enameled wire (8), and the waveforms of the signal are displayed by the oscilloscope. The utility model has the advantages that the utility model has low price, ultrasound guided wave can be detected without grinding end face of the stranded wires, and repeatability and operability of detection are improved effectively.

The invention discloses a pulse eddy electromagnetism nondestructive detection method based on a probe with an iron core coil. The probe consists of an iron core bundle, an excitation coil and a detection coil, wherein the iron core bundle is arranged in the center of the excitation coil; the detection coil is arranged outside the excitation coil. When the probe with the iron core coil is adopted to perform pulse eddy detection on a part, a strong pulse magnetic field of a dense space can be generated, an excitation magnetic field is increased, the signal to noise ratio of a signal is increased, and pulse eddy detection on a component with a relatively large wall thickness can be achieved under a relatively high lift-off condition. When a pulse eddy electromagnetism nondestructive detection system based on the probe with the iron core coil is adopted for detection, the influence of the pulse eddy field inside the iron core to the detection signal can be measured according to a probe time constant tau s. When tau s is greatly smaller than a part diffusion time constant tau e, the influence of the pulse eddy field inside the iron core to the detection signal can be ignored, the function of the probe with the iron core coil can be approximated to be linear amplification of the detection signal, and thus the signal processing difficulty is reduced.

The invention provides a moving-magnetic type linear vibration motor. The moving-magnetic type linear vibration motor comprises a casing with an accommodating space, two elastic elements, a mass block, two magnets and two coils, wherein the two elastic elements are connected to the side walls of the casing oppositely; the mass block and the two elastic elements are connected and suspended in the accommodating space of the casing through peripheral walls respectively; the two magnets are fixedly connected to two ends of the mass block respectively, and the center connecting lines of the magnetsand the two elastic elements form an acute angle or an obtuse angle; the two coils are fixed on the casing with the corresponding magnets at intervals, and the center connecting lines of the coils and the two elastic elements form an acute angle or an obtuse angle. Lorentz force received by the coils can be decomposed into component force in the first direction of the center connecting line of the two elastic elements and component force in the direction perpendicular to the second direction of the center connecting line of the two elastic elements, and the magnets correspondingly receive twoacting forces in opposite directions, wherein the two acting forces are equal to the two component forces of Lorentz force received by the coils. A vibrator assembly comprising the magnets and the mass block can vibrate in two mutually perpendicular directions.

The invention relates to a magnetic roller used in a laser printer and a copier. An isotropic bonded NdFeB magnet used by the magnetic roller contains rare earth permanent magnetic powder and adhesive resin, wherein the rare earth permanent magnetic powder is a mixture of NdFeB magnetic powder and ferrit magnetic powder, and the formed magnet has the length of between 210 and 910mm. When the isotropic bonded NdFeB magnet is used to replace one or more ferrit permanent magnet poles in the magnetic roller, because the bonded NdFeB magnet has stronger magnetic performance than ferrit magnets, a strong magnetic filed can be formed on an outer surface taking the bonded NdFeB magnet as a pole so as to provide stronger magnetic filed adsorptive power, contribute to the size distribution of multiple kinds of color matching powder, and reduce the grey back of copying and printing to contribute to clear imaging.

The invention provides a dual-rotor axial disk-type permanent magnet motor. A dual-motor and intermediate stator mode is adopted in structural layout, and magnetic flow is axial in direction; dual rotors output rotation speed and torque through a rotating shaft connected with the dual rotors, and permanent magnets arrayed in a trapezoid halbach form are arranged on inner sides of the rotors. The motor stator is designed in a non-yoke structure and adopts a multi-tooth combination and is fixed on a main case; the main case is in topology design, vent holes are arranged in the surface of the main case, and passive heat dissipation of the motor is facilitated; the dual-rotor axial disk-type permanent magnet motor has the advantages of small size, light weight and high power-to-weight ratio and is applicable to equipment of electric and hybrid cars, aircrafts and the like. The invention further relates to a non-rotor core structure design, and the power-to-weight ratio of the motor is further increased.

The functional magnetic Temali fiber has ingredients including polymer, magnetic particle, superfine Temali powder and coupling agent. Compared with available far infrared magnetic fiber, the functional magnetic Temali fiber has the advantages of capacity of generating strong magnetic field, and natural superfine Temali powder no harm to human body and no environmental pollution. The superfine Temali powder has weak current of 0.06 mA to stimulate skin constantly, strengthen the regulating effect of nerve system and promote body's blood circulation, and can generate high density negative oxygen ion. The fiber of the present invention may be used in producing clothing, bed ware and other health products with the effects of strengthening cell activity and myocardial function, improving sleep and promoting metabolism.

The invention provides an antenna device and a mobile terminal with the same. The antenna device comprises at least two layers of stacked coils; a second feed point electrically connected to an NFC (Near Field Communication) chip or an RFID (Radio Frequency Identification) chip is respectively arranged on the coils, and a first feed point electrically connected to a WPC (Wireless Power Consortium) chip or an FM (Frequency Modulation) chip is respectively arranged on the two coils of the surface; and the two adjacent layers of coils are isolated by an isolating unit, and the isolating unit is configured to isolate working signals of the NFC chip or the RFID chip. The antenna device realizes superposition of effective area of antennas via multilayer superposed coils, the coils can be connected or isolated to support two different functions, and multiplexing of the antenna device is realized; meanwhile, in the NFC or RFID working mode, the intensity of the radiation electromagnetic field can be improved, and the NFC or RFID communication performance is optimized.

A variable orifice flow sensor (10) includes a flow conduit member defining a flow orifice and fluidly connecting first and second fluid flow ports (12, 16), a flapper of magnetizable sheet metal that is mount in the conduit member by a hinge portion so that the flapper angularly deflects out of the plane of the orifice (18) in response to fluid flow through the conduit member to vary the effective fluid flow cross-sectional area of the orifice in proportion to the flow rate of fluid through the conduit member, and a pressure sensing tap on either side of the flapper. A deflection-limiting surface is provided in the conduit member adjacent the hinge portion. The hinge portion abuts against the deflection-limiting surface when the flapper experiences an angular deflection at least equal to a predefined angle in response to a fluid flow rate that is at least equal to a predetermined value, whereby overstressing the hinge portion is minimized.

The invention provides a magnetostriction-based precise feeding driving device. The device comprises a magnetic-induced driving shaft body, and a loop magnetic field generating device which sleeves the magnetic-induced driving shaft body is rotated relative to the magnetic-induced driving shaft body; an excitation magnetic field for enabling a magnetic-induced displacement driving mechanism to drive and displace is arranged between the loop magnetic field generating device and the magnetic-induced driving shaft body; an elastic end cover part of the magnetic-induced driving shaft body is elastically deformed only in the displacement output direction. The invention also provides a processing machine tool equipped with the magnetostriction-based precise feeding driving device. According to the magnetostriction-based precise feeding driving device, the structure is simple; the mass is light; the magnetism between a permanent magnet and / or an electromagnet is utilized to generate processing acting force for rotating and reciprocating vibrating; the control precision is high; the response frequency is high; a conductive sliding ring is removed, so that the reliability of the device is improved; the magnetostriction-based precise feeding driving device is particularly suitable for hard and brittle materials and metals which are difficultly processed such as titanium.

The invention discloses an ultrahigh frequency band near field RFID reader-writer antenna. A coaxial connector is connected with one end of a coplanar waveguide on a PCB base plate; the other end of the coplanar waveguide is connected to one end of a coplanar strip line by a balun; the other end of the coplanar strip line is connected with a resistor; the PCB base plate and a metal floor are supported by nylon columns on four corners of the PCB base plate; an air layer is formed between the PCB base plate and the metal floor; and a conduction band width, a gap width between conduction bands, the dielectric constant of the PCB base plate, the thickness of the air layer, the impedance of the balun and the parameters of a resistance value are subject to properly matching the impedance among the coplanar waveguide, the balun, the coplanar strip line and the resistor. The invention has relatively wide frequency band and relatively strong magnetic field, and the antennas with different lengths can be conveniently designed according to the application requirements under different circumstances.

The invention relates to a method for nondestructively testing micro-defects in sheet ferromagnetic materials based on measurement of magnetostatic force and belongs to the technical field of nondestructive testing. The method comprises the following steps: arranging a permanent magnet on the surface of a calibration sheet, and measuring reacting force of magnetostatic force which acts on the permanent magnet by using a force sensor; arranging the permanent magnet on the surface of a sheet to be measured, and measuring reacting force stressed by the permanent magnet by using the force sensor; and comparing the two reacting forces, if the same, determining that a surface defect or an internal defect does not exist on the sheet to be measured, and if different, determining that a surface defect or an internal defect exists on the sheet to be measured. The method is simple in measurement process, relatively low in detection cost and reliable in detection result; the measurement accuracy is high, and micron order micro-defects in the magnetic sheets can be detected; the detection speed is high, and sheet materials can be rapidly detected on line in real time.

The invention relates to a magnetic controlled sputtering target with functions of magnetic field enhancement and adjustment. The magnetic controlled sputtering target comprises a target body, an internal magnetic circuit and a water cooling system, and is characterized in that a radial magnetism charge side magnetic ring is arranged outside a magnetic conductive yoke where the rear part of a positive magnetic ring is connected with a magnetic conductive yoke iron; a double-stage position adjusting mechanism is arranged at the lower part of the target. The side magnetic ring can reduce the magnetic leakage flux outside the target obviously, the horizontal magnetic field on the surface of target is enhanced greatly, and therefore, the strong magnetic field requirement on coating a ferromagnet can be met. The double-stage position regulating mechanism can change the front and rear positions of the target face relative to the flange plate of target seat in on-line and continuous ways, therefore to adjust the front and rear positions of the target-substrate distance of the target and the internal magnetic circuit structural section of the target relative to the surface of the target, to ensure that the target is suitable for different sputtering and filming process of the target which have different requirements on the surface magnetic field, such as different magnetic conductibility and different thickness. The invention provides a convenient and fast key component structure for adjusting the magnetic controlled sputtering and filming process parameter.

The invention discloses a method for using voltage source frequency converter to drive a synchronous motor, comprising a control method on the start synchronization of synchronous motor, a control method in continuous operation, a control method on normal stop and emergency stop, a method cooperated controlling the excitation device of the synchronous motor, and an accident protect method in the operation of the synchronous motor. The invention is characterized in that the invention can use voltage resource frequency-converter to drive synchronous motor, to stably start, stop and operate at high-frequency of frequency conversion. And in emergency, the invention can reliably protect synchronous motor, frequency converter and the excitation device.

The invention discloses a passive damping adjustable magneto-rheological fluid shock absorber. The lower end of a damping cylinder is provided with a piston body; a spring is arranged between the piston body and the bottom surface of the damping cylinder; the middle part of the damping cylinder is provided with a T-shaped piston body; a coil is embedded in a groove at the middle part of a cylindrical surface at the small end of the T-shaped piston body; the coil is sequentially provided with inner and outer hole bodies outwards; the inner and outer hole bodies are in clearance fit; the upper end of the damping cylinder is provided with a T-shaped damping cavity cover body; the upper end of an induction cylinder is connected with an induction cavity cover; permanent magnets are fixed amongan inner hole of the induction cylinder, the damping cavity cover body and the lower end of an induction cavity cover; a piston rod passes through the induction cavity cover, an induction iron core and the damping cavity cover body to be connected with a threaded hole at the center of the T-shaped piston body; an induction coil is embedded in a groove of the induction iron core; the two coils areconnected through a lead hole in the middle of the piston rod; a sealed inner cavity is formed among the damping cavity cover body, the piston body and the damping cylinder; and the sealed inner cavity is filled with magneto-rheological fluid. The size of a damping force of the shock absorber can be automatically regulated according to the vibration condition and an external power supply and a controller are not required.

A reconfigurable electric motor includes a rotor containing rotatable permanent magnets or non-magnetically conducting shunting pieces. The magnets and / or shunting pieces have a first position producing a weak magnetic field for asynchronous induction motor operation at startup and a second position producing a strong magnetic field for efficient synchronous operation. The motor includes a squirrel cage for induction motor operation at startup with the permanent magnets and / or shunting pieces positioned to product the weak magnetic field to not interfere with the startup. When the motor approaches or reaches synchronous RPM, the permanent magnets and / or shunting pieces rotate to produce a strong magnetic field for high efficiency synchronous operation. The position of the magnets and / or shunting pieces may be controlled by a centrifugal mechanism, or viscous damping may delay rotation of the magnets and / or shunting pieces, or electrically controlled apparatus may control positions of the magnets and / or shunting piece.

The invention discloses a curved surface wall-climbing robot for surface cleaning. The robot comprises a front wheel driving mechanism, a rear wheel driving mechanism, a posture adjusting mechanism and a cleaning and derusting mechanism; the front wheel driving mechanism and the rear wheel driving mechanism are the same in structure; a steering motor in the posture adjusting mechanism drives a front wheel rotating claw and a rear wheel connecting claw to rotate, then a connecting rod is driven to move, so that the front wheel driving mechanism and the rear wheel driving mechanism are divertedin opposite directions; a guide air driver and an air cylinder in the cleaning and derusting mechanism are fixed to the side face of a transverse beam through a mounting frame, by controlling the posture of a cleaning disc, the cleaning disc can swing; a soft rubber gasket is fixed on the lower side of the cleaning disc, and can tightly press a working wall surface; and a rotator nozzle is fixed to the center of the upper surface of the cleaning disc, is connected with a high-pressure water pipe, and sprays high-pressure water outwards through a spraying rod. The robot can climb on a curved surface with a large curvature, the operation environment and the operation capability of the robot are expanded, and meanwhile, the cleaning requirements under different postures can be met.

The present invention provides a bistable electromagnetic driver and a product with the same. The electromagnetic driver comprises the following components: a first permanent magnet (301); a second permanent magnet (302) which is equipped relatively to the first permanent magnet (301) and has same polarity with the first permanent magnet; a movable member (303) which is provided between the first permanent magnet (301) and the second permanent magnet (302) and is wound by excitation coil (304), wherein through exerting current with different directions to the excitation coil (304), the movable member (303) can move between the first permanent magnet (301) and the second permanent magnet (302). The bistable electromagnetic driver provided by the invention has the advantages of good stability and low energy consumption.

The invention discloses a double-stator doubly salient hybrid excitation motor drive system, and the system comprises fault reconstruction five-phase T-type three-level inverters and a double-stator doubly salient hybrid excitation motor; two sets of windings of the double-stator doubly salient hybrid excitation motor are separately powered by two sets of fault reconstruction five-phase T-type three-level inverters, and the two sets of fault reconstruction five-phase T-type three-level inverters are independent with each other. The double-stator doubly salient hybrid excitation motor adopts a double-stator structure which comprises an outer stator, an inner stator, doubly salient rotor, a permanent Nd-Fe-B magnet, a permanent Al-Ni-Co magnet, a magnet regulating coil and an armature winding; and the two stators share one doubly salient rotor. According to the invention, the double-stator doubly salient hybrid excitation motor drive system is provided, a control method of the system is also provided, and the system has advantages of high power density, high efficiency, high reliability, high magnet regulating ability and the like.

A nuclear magnetic resonance well logging machine probe permanent magnet for generating gradient magnetic field in ground layer, engaged with nuclear magnetic resonance well logging machine to check the physical information of ground layer, is characterized in that a magnet post (86)is composed of adhered at least one small magnetic block (6), wherein the magnet is one portion of one cylinder. The invention sticks the magnet on well wall, while the magnet is N30 high-energy-accumulation samarium-cobalt magnet, with small volume, strong magnetic field, and high detection length. The invention simplifies the probe structure, improves the bearing strength of whole probe, improves the length of pre-polarized magnet, and improves detection speed, which can avoid blind area at the well wall direction, to improve detection accuracy, and generate gradient magnetic field along the well wall, to realize multi-dimension well logging.

The invention belongs to the field of oil and gas transmission pipeline cleaning, and particularly relates to a pigging working condition monitoring and blocking accurate positioning method for a buried oil and gas transmission pipeline cleaner, based on single shaft magnetic-flux-gate magnetic anomaly detection. The implementation method includes arranging a permanent magnet set on the cleaner; using weak field detectors arranged on an earth surface to monitor magnetic field fluctuation so as to determine whether or not the cleaner can normally pass; and using a weak field detector array to search and positioning a position of the cleaner along a blocked segment of a pipeline while the cleaner is blocked, and directing the excavation. The pigging monitoring and blocking positioning implementation method is easy to operate, is low in use cost, can effectively avoid environment pollution and influence on worker health, is rapid and accurate in positioning, and is remarkable in economic benefit.

The invention provides a magnetic rod antenna. The magnetic rod antenna comprises a magnetic rod and a wire, wherein a plurality of parts of the wire are sequentially wound around the magnetic rod to form a plurality of coils in an alternately sparse and dense manner, and the magnetic field intensity of the plurality of coils laminated on division magnetic fields of respective cross section of the same magnetic rod is higher than the magnetic field intensity of the total magnetic field of the coil formed by uniformly winding the existing wire around the magnetic rod. The magnetic rod antenna provided by the invention is longer in signal transmission distance, and is not susceptible to the interference of an outside environment; and moreover, with the magnetic rod antenna provided by the invention, the magnetic flux of the antenna can be improved.