34results about How to "Change magnetism" patented technology

A valve for a magnetorheological liquid comprises a duct through which the magnetorheological liquid can flow and which can be exposed to a variable magnetic field such that the flow resistance of the duct can be set using the magnetic field in the duct. The magnetic field can be lastingly generated using a magnet device made at least in part of magnetically hard material. The magnetization of the magnet device can be lastingly modified by a magnetic pulse of a magnetic field generation device in order to lastingly change the magnetic field in the duct and thus the flow resistance of the duct. A valve of the invention requires energy only to change settings while a specific setting can be lastingly maintained without supplying energy.

The invention discloses a new material stirring device capable of mixing materials more uniformly and realizing automatically changing, and belongs to the technical field of new materials. The devicecomprises a tank body, the top of the tank body is fixedly connected with a motor; a rotating rod fixedly connected with an output shaft of the motor is movably connected to the middle of the tank body, an electromagnet is fixedly connected to the middle of the rotating rod, uniformly distributed fixed rods are fixedly connected to the outer side of the rotating rod, springs are fixedly connectedto the inner walls of the fixed rods, movable rods are fixedly connected to the outer sides of the springs, and magnetic blocks are fixedly connected to the middles of the movable rods. The inventiondiscloses the new material stirring device capable of mixing materials more uniformly and automatically changing. Through cooperative use of the movable rods and the electromagnet, during use, the movable rods can do telescopic motion in the fixed rod at a constant speed, so that the stirring radius of the stirring device is continuously changed, it is guaranteed that materials cannot be accumulated, the mixing efficiency of the materials is improved, the uniformity of the materials is guaranteed, and the performance of new materials is guaranteed.

The invention discloses an automatic separation mechanism for a fire hose and a quick connector. The automatic separation mechanism comprises a magnetic fixing sleeve, a fire hose clamping sleeve, a magnetic sliding sleeve and a remote controller, wherein the magnetic fixing sleeve is fixed to the quick connector in a sleeving mode; the fire hose clamping sleeve is fixed to the other end of the quick connector in a sleeving mode; the magnetic sliding sleeve is arranged on the quick connector in a sliding and sleeving mode, one end of the magnetic sliding sleeve is magnetically connected with the magnetic fixing sleeve, and the other end of the magnetic sliding sleeve abuts against the fire hose clamping sleeve; and the remote controller is electrically connected with the magnetic sliding sleeve and the magnetic fixing sleeve. The magnetism of the magnetic sliding sleeve and the magnetism of the magnetic fixing sleeve are changed through the remote controller, so that the magnetic sliding sleeve and the magnetic fixing sleeve are repellent in the same pole and attractive in the different pole, and separation and combination of the magnetic sliding sleeve and the magnetic fixing sleeve are achieved; when the magnetic sliding sleeve and the magnetic fixing sleeve are repellent in the same pole and separated, the magnetic sliding sleeve pushes the fire hose clamping sleeve to be quickly separated from the quick connector; and the automatic separation mechanism is simple in structure, high in safety and high in efficiency.

The invention discloses a magnetic copper-nickel-iron-cobalt alloy thin strip and a preparation method therefor and relates to a copper base alloy in which cobalt is a secondary major ingredient. The general formula of the elemental composition of the magnetic copper-nickel-iron-cobalt alloy thin strip is CuxNiyFezCow; the preparation method of the thin strip comprises the steps of changing the proportioning of the composition of a magnetic copper-nickel-iron-cobalt alloy and adopting a melt-spun preparation method to prepare the magnetic copper-nickel-iron-cobalt alloy thin strip with better magnetism and composition uniformity, so as to overcome the problems of a copper-nickel-iron alloy of an existing elemental composition that the magnetism needs to be improved while a cast ingot has serious segregation, and the defect that the existing copper-nickel-iron alloy is not suitable for hot working is also overcome.

The invention discloses a shell hardness detecting device for display screen shell processing. The shell hardness detecting device comprises a detecting platform and is characterized in that a plurality of antiskid bases are fixed to the lower lateral wall of the detecting platform, two support plates are fixedly connected to the upper lateral wall of the detecting platform, a slide rod is fixedlyconnected between the two support plates, a clamping mechanism is arranged on the slide rod, a vertically arranged mounting rod is fixedly connected to the upper lateral wall of the detecting platform, and a detecting mechanism is arranged on the mounting rod. The shell hardness detecting device has the advantages that the stability of a display screen during hardness detecting can be guaranteedby clamping the display screen, a drop hammer can be move vertically by using a double-pole-double-throw switch to perform current flow direction switching, and the drop hammer drops onto the displayscreen to perform hardness detecting.

The invention relates to the technical field of circuit board heat dissipation, in particular to an integrated circuit board surface dust-free heat dissipation and cooling assembly which is characterized by comprising a PCB, a heat dissipation box, an air bellow and an adjuster, the heat dissipation box is fixed to the PCB through screws, the heat dissipation box and the air bellow are fixedly connected into an integrated structure, and the adjuster is further arranged in the air bellow; a plurality of heat dissipation plates are fixedly connected in the heat dissipation box, and are providedwith matching grooves and heat dissipation covers; the front end of the heat dissipation box is provided with a No.1 pressure release hole. According to the integrated circuit board surface dust-freeheat dissipation and cooling assembly, a brushless fan operates at a constant speed, cold air can flow through the heat dissipation box, so that the PCB is cooled uninterruptedly, the plurality of invert-n-shaped heat dissipation plates are arranged, so that independent flow channels can be formed in the heat dissipation box, and the heat dissipation plates and the heat dissipation covers are clamped on capacitors and resistors on the PCB, so that high-temperature elements on the PCB can be subjected to heat dissipation in a centralized manner, and the uniform temperature state of the PCB canbe kept.

The invention discloses a terahertz wave emitter with actively adjustable intensity and polarization. The terahertz wave emitter comprises a ferroelectric layer; a conducting layer which is arranged on one side of the ferroelectric layer; a ferromagnetic metal film which is arranged on one side, deviating from the conductive layer, of the ferroelectric layer; a non-ferromagnetic metal film which is arranged on one side, deviating from the ferroelectric layer, of the ferromagnetic metal film; a magnetic field device which is used for applying a magnetic field which is parallel to the ferromagnetic metal film in the horizontal direction to the ferromagnetic metal film, wherein the direction of the magnetic field is adjustable; one end of the voltage device is connected with the conductive layer, and the other end is connected with the non-ferromagnetic metal film. The femtosecond laser source is used for emitting femtosecond laser, the femtosecond laser sequentially penetrates through the conductive layer, the ferroelectric layer, the ferromagnetic metal film and the non-ferromagnetic metal film in the direction perpendicular to the conductive layer, and terahertz waves with adjustable intensity and polarization are generated under the control of the magnetic field device and the voltage device. The terahertz wave emitter is low in production cost, the polarization intensity canbe flexibly controlled, and practical application is facilitated.

The invention provides an anti-locking charging gun, an anti-locking method, an anti-locking device and a charging pile. The anti-locking charging gun comprises a gun body and a contact kit which areconnected with each other; one side of the contact kit is matched and connected with a gun head of the gun body, and the other side is connected with an automobile socket; N kit connecting holes are formed in the periphery of the contact kit; kit magnets are arranged in the kit connecting holes; N gun body connecting columns are arranged on the periphery of the gun body; the gun body connecting columns are arranged in the kit connecting holes; an electrified coil is arranged on the outer wall of each gun body connecting column, and the electrified coils are connected with the corresponding kitmagnets in a touch mode; the gun body is provided with a control circuit and two power supplies; the two power supplies include a first power supply and a second power supply; the control circuit isconnected with a charging pile server, the control circuit is connected with the first power supply and the second power supply through a double-pole-double-throw switch; and the electrified coils areconnected with the first power supply and the second power supply respectively; and the first power supply and the second power supply provide two different current flowing directions for the electrified coils respectively.

The invention discloses a laser cutting method and equipment. The laser cutting method is used for cutting a rare earth permanent magnetic alloy material. The method comprises: under the condition of cutting the rare earth permanent magnetic alloy material by laser, carrying out gas protection and cooling treatment on the rare earth permanent magnetic alloy material through a gas cooling and protection device. By protecting a machined device through the gas cooling and protection device, conditions that a cutting part is at a fused state and an alloy of a critical region is influenced so that a metallographic structure of the alloy is changed are avoided, so that a magnetic performance of the alloy is changed, and the machining accuracy of micro-devices can be guaranteed.

The invention discloses a multifunctional sealing interface device for an air performance test bed, which belongs to the technical field of air performance test. The device comprises a ventilation section and a control valve section arranged on the ventilation section, the air outlet end of the ventilation section is connected with an air duct in the air performance test device, and the air inlet end of the control valve section is provided with a corrugated pipe receiving disc; an airflow channel is formed in the ventilation section, and an annular cavity communicated with the airflow channel is formed in the air inlet end of the ventilation section; the control valve section comprises a control valve shell communicated with the airflow channel, a thrust assembly is arranged in the control valve shell, and the space between the interior of the control valve shell and the airflow channel is divided into a third cavity and a fourth cavity which can be communicated. According to the device, the step of adhesive tape sealing between an air duct in a test air duct and an air outlet cover or a corrugated pipe at an air outlet of an integrated cooker or a range hood in an air performance test is replaced, the workload of experimenters is reduced, and compared with adhesive tape sealing, gas leakage caused by too large airflow in the experiment process is avoided.

The invention discloses a preparation method of a lanthanum manganese oxide/strontium iridate heterojunction thin film, the lanthanum manganese oxide/strontium iridate heterojunction is prepared by adopting a pulse laser deposition method, a pretreated substrate is put into a vacuum chamber to be heated to a certain temperature, and under a certain oxygen pressure condition, the lanthanum manganese oxide/strontium iridate heterojunction thin film is prepared by adopting the pulse laser deposition method. A plasma plume deposition sample generated by bombarding a target material through pulse laser is used, firstly, a strontium iridate film is deposited, in-situ annealing is carried out after deposition is finished, then, a lanthanum manganese oxide film continues to be deposited through the same steps under the same condition, and finally, after in-situ annealing is carried out, the temperature is reduced to the room temperature. The preparation method of the lanthanum manganese oxide/strontium iridate heterojunction is simple and rapid, the prepared lanthanum manganese oxide/strontium iridate heterojunction film has obvious interface magnetism, the interface magnetism of the heterojunction can be effectively regulated and controlled by adjusting the thickness of lanthanum manganese oxide in the heterojunction, and the lanthanum manganese oxide/strontium iridate heterojunction film has wide application prospects in the field of spin electronic devices.

The invention discloses a reversibly rotating electromagnetic motor, which comprises a motor body, a protection frame and a linkage shaft are arranged at the left end of the motor body, and the linkage shaft is arranged through the motor body. The right end is equipped with a heat sink and a heat dissipation port, and the heat dissipation port is embedded in the heat sink. The top of the motor body is provided with a controller. By moving the handle on the controller, the current flows in the reverse direction and the magnetism of the positive electrode plate is changed to realize the reverse rotation of the motor. The process is easy to operate and can be realized without any post-processing by the staff, making this Electromagnetic motors can be more widely used and recognized in the market, and this type of motor can also help the type of motor to change direction and rotate by turning to the magnetic pole, and there will be no confusion that makes the type of motor unable to operate normally.

The invention belongs to the technical field of optical detection, and relates to a high-sensitivity optical detection device. The high-sensitivity optical detection device comprises an antiferromagnetic layer, a pinning layer, a barrier layer, a free layer and a precious metal micro-nano structure. According to the high-sensitivity light detection device, the pinning layer, the barrier layer and the free layer form a magnetic tunnel junction. When the device is used, to-be-measured light irradiates the precious metal micro-nano structure, and meanwhile, a fixed magnetic field is applied to the device. The intensity or wavelength of the to-be-measured light is determined by measuring the magnetoresistance difference of the magnetic tunnel junction under the irradiation of the to-be-measured light and without the irradiation of the to-be-measured light. According to the high-sensitivity light detection device of the invention, precious metal micro-nano structures with different sizes or shapes can be arranged, so that the resonant wavelength of the precious metal micro-nano structures can be adjusted, so that detection of incident light with different wavelengths is realized. Therefore, the high-sensitivity light detection device of the invention has the advantage of wide detection wavelength range of light, and has a good application prospect in the field of light detection.

The invention belongs to the technical field of power vehicles, and particularly relates to an outdoor military multifunctional mobile power vehicle which comprises a tractor and a carriage, a photovoltaic panel is placed on the upper side wall of the carriage, the interior of the carriage is connected with the photovoltaic panel through a leveling mechanism, and a plurality of solar cells are fixedly connected to the inner wall of the upper side of the photovoltaic panel. The lower side wall of the solar cell monomer is fixedly connected with a piston cylinder, a piston plate is inserted in the piston cylinder, and mercury is filled between the piston plate and the piston cylinder. According to the invention, the trend of light is disturbed, so that the light is uniformly irradiated on the photovoltaic panel, the problem that a battery assembly in the photovoltaic panel is damaged by shadow is avoided, dust on the surface of the photovoltaic panel is cleaned, the generating capacity of the photovoltaic panel is ensured, and meanwhile, the photovoltaic panel is controlled to be always kept on the horizontal plane; the problem that the generating capacity of the photovoltaic panel is affected due to the fact that the included angle between light and the photovoltaic panel is too small is avoided.

The invention relates to a robot eyeball structure which comprises a collection module, an eyeball, a ball socket, a magnetic column, a magnetic generation device and a driving assembly, wherein the eyeball is movably arranged in the ball socket, and the collection module is arranged in the eyeball; the magnetic column is arranged at the tail end of the eyeball, and the axis of the magnetic column is collinear with that of the eyeball; and the magnetic generation device is arranged on the driving assembly and is driven by the driving assembly to rotate around the magnetic column. The robot eyeball structure has the beneficial effects that when the collection module needs to adjust a collection direction, the driving assembly drives the magnetic generation device to rotate around the magnetic column to a preset position, and then the magnetic generation device is started to generate a magnetic force with a specific magnitude, direction and polarity, so as to drive the magnetic column to deflect a preset angle in a preset direction by taking the eyeball as a rotation center point, and indirectly adjusts the eyeball to deflect by the preset angle in the preset direction, thereby realizing adjustment of the collection direction, being wide in adjustable range, and having few collection blind zones.

The invention provides a vibration feedback measuring device based on the Internet of Things. The device comprises a shell, an installation base and an intelligent processing system, a super-range indicator light is fixedly installed on the front side of the shell, a power line is connected with one side of the shell, and an installation groove is formed in the bottom of the shell; the shell is fixedly installed in the center of the top of the installation base, a circuit board is installed on the inner side wall of one side of the installation groove, a measuring base is fixedly installed atthe top of the installation base, and the top of the measuring base is fixedly connected with the inner side wall of the top of the installation groove; a cavity is formed in the measuring base, a magnet mass block is installed in the cavity, a movable electrode slice is fixedly inlaid in one side of the magnet mass block, and a fixed electrode slice is fixedly inlaid in the inner side wall of oneside of the cavity. The vibration feedback measuring device based on the Internet of Things is reasonable in design, the measuring range can be adjusted, and the high adaptability is achieved.