143results about How to "Change the strength of the magnetic field" patented technology

The invention relates to a magnetic coupling, in particular to a remote intelligent speed control axial asynchronous magnetic coupling and a speed regulating method. The meshing area between a permanent magnet and a conductor can be well adjusted by taking a remote intelligent controller to drive and control a motor to rotate, and in such way, the volume of the output torque is changed and precise speed change is realized. According to the invention, the application range of the magnetic coupling is expanded. The remote intelligent speed control axial asynchronous magnetic coupling is suitable for working under the situations with violent vibration, dust and impurities and other harsh conditions. The remote intelligent speed control axial asynchronous magnetic coupling can be widely used in the petrochemical industry, metallurgical industry, mining industry and the like.

The invention provides a mini-type combined type energy collector based on PVDF (Poly Vinyli Dene Fluoride) and a preparation method. A cantilever structure is prepared by using a flexible polymer piezoelectric material PVDF, resonance is generated through the PVDF piezoelectric cantilever, and vibration is converted into electric energy by using a piezoelectric effect; and meanwhile, a PDMS (Poly Di Methyl Siloxane) mass block containing nanometer particles, which is fixedly connected with the mini-type combined type energy collector, vibrates with the vibration of the PVDF piezoelectric cantilever, so that the magnetic flux of passing through a plane spiral coil electrically plated on a substrate can be varied, and sensing electromotive force is generated. Therefore, output power is externally loaded. The mini-type combined type energy collector provided by the invention uses a polymer piezoelectric material PVDF to replace a traditional piezoelectric material PZT (Piezoelectric Transducer), and energy collection can be carried out through a piezoelectric manner and an electromagnetic manner, so that the output power and the efficiency of the energy collector can be obviously improved, and the mini-type combined type energy collector is biologically compatible.

The invention provides a magnetic device and an OLED evaporation device. The magnetic device is used for adsorbing a metal mask from the OLED evaporation device, and comprises a metal plate, an electromagnet array comprising a plurality of electromagnets each inserted on the metal plate, a power supply module for providing current, a control module for controlling the power supply module to add direct current into all or part of the plurality of electromagnets by sending a first control signal to the power supply module when the metal mask is adsorbed in an OLED evaporation process and controlling the direction and the value of the direct current, wherein two magnetic poles of each electromagnet are arranged on two sides of the metal plate respectively. According to the magnetic device, the magnetic field intensity and the magnetic pole distribution for adsorbing the metal mask can be changed during OLED evaporation.

The invention relates to a method for preparing a gel injection mold of a gradient material in a revolving magnetic field. The existing method is difficult to realize continuous and even variation of material compositions, or difficult to obtain large-thickness materials and the like. The method comprises the following steps: mixing ferromagnetic particles and non-magnetic particles into mixed powder; preparing organic monomer and a cross-linking agent into premixed solution; adding the mixed powder into the premixed solution; adding a dispersing agent into the solution; obtaining a dispersedslurry through ball milling and ultrasonic dispersion treatment; adding an initiator and a catalyst into the dispersed size; pouring the size into a mold after stirring; applying the revolving magnetic field outside the mold; and taking out the mold after gelling, drying, pressing and sintering. The method can prepare gradient materials with various thicknesses in a large ingredient range, has continuous variable and controllable ingredients, simplified process and reduced cost.

The invention relates to a magnetic nozzle of a variable specific impulse magnetic plasma rocket, aiming at solving the problem of speed waste during acceleration of a plasma body in an electric propulsion system and relating to the design technology of the magnetic nozzle of the variable specific impulse magnetic plasma rocket. The magnetic nozzle of the variable specific impulse magnetic plasma rocket is used for changing a circumferential speed of the plasma body to an axial speed and belongs to the magnetic fluid technology field. The magnetic nozzle which is used as the last stage of the variable specific impulse magnetic plasma rocket is arranged at the tail end of a rocket engine and consists of a sprayer nozzle and a superconducting coil, wherein, the sprayer nozzle is arranged at the tail end of a shell body of the rocket engine and is an expanding nozzle, the nozzle expansion ratio which is the ratio between a nozzle exit area and a nozzle throat area is 40:1, the nozzle is made of a heat-resisting and ablation-resisting alloy material to reduce ablation and thrust eccentricity.

The invention discloses an electric drive impact tool. The main technical feature includes: electromagnetic coil connecting to impulse power supply is set in the case; impact bar passing through the cavity of electromagnetic coil; iron core section, which is located at the opening part moving toward after the impact bar having magnetic force, is set in the impact bar; under free state, the first elastic component and the second elastic component constraining the impact bar on the certain original location. The linear movement of impact bar could be generated by magnetic force. Thus, it is quiet, and reliable, and the volume is sharply decreased. It could be widely used in the fields of carving, magnetism carving, hammering, etc.

The invention relates to an angular displacement sensor, belonging to the technical field of magnetoelectric sensors. The sensor comprises a rotating member (1), wherein the rotating member (1) comprises a magnetic element (2) with magnetizing direction substantially parallel to the axial direction of the rotating member (1) thereof. The magnetic field generated by the rotating member (1) forms parallel and uniform magnetic field in the magnetic flux induction surface of a Hall sensor (4). When the rotating member (1) rotates, the increment of the magnetic intensity detected by the Hall sensor (4) is proportional to the angular increment in a wide angular region, so as to realize the measurement to the angular displacement. The inventive angular displacement sensor has the advantages of simple structure, low production cost, good signal stability, and highly linear and controllable signal conditioning.

The invention discloses an initiative electromagnetic control system for slab and girder structure vibration. The initiative electromagnetic control system comprises a mechanical portion and a control portion. The mechanical portion comprises a wall made of nonferromagnetic materials, a slab and girder structure and electromagnets. One end of the slab and girder structure is connected with the wall, a displacement sensor is arranged on the slab and girder structure, and the electromagnets include electromagnets A, B, C and D. The control portion comprises a computer, a power amplifier and a full-wave rectification circuit without a filter. The computer is connected with the displacement sensor, an input end of the power amplifier is connected with the computer, one path of an output end of the amplifier is connected with the electromagnets A and D through a bridge rectification circuit without a filter while the other path of the same is directly connected with the electromagnets B and C. When the slab and girder structure vibrates, magnetic pole polarity and magnetic field intensity of the electromagnets can be automatically changed to attenuate the vibration quickly, so that damages to a mechanical system caused by vibration are reduced.

A process for preparing a function gradient material by gel moulding in static magnetic field includes such steps as preparing mould, proportionally mixing ceramic powder, strong-magnetic metal powder and water or solvent, ball grinding, pouring in mould in the static magnetic field (0.1-5.0 T), solidifying, baking and sintering. Its advantages are high performance and low cost.

The invention provides a liquid metal computer. The computer comprises a logic device which achieves the computer frame structure in a combined mode, and the logic device is a flexible device and mainly comprises liquid metal, flexible thin films and control components; the computer mainly uses the electroconductivity difference of the liquid metal in different physical or chemical states as the states of 0 and 1 of a logic operation, then logic units are constructed through combinations of multiple liquid metal components, and the programming calculation function of the computer is finally achieved; regulating methods of liquid metal conductive states comprise a solid-liquid phase change method, a current regulating oxide film method and a magnetic field environment controlling method. The invention further provides computer construction schemes, wherein the first scheme is that multiple liquid metal components are used for forming basic logic elements; the second scheme is that new circuit construction modes are combined with conventional electronic elements, and the liquid metal is used as connection switches of the electronic elements; the third scheme is that multiple basic elements are combined to construct an analogue computer.

The invention relates to trig moment stepless adjusting permanent-magnet slack adjuster. It includes stator and rotor, and at least one elastic device, the rotor is at the out side of the stator, the stator composes magnet retainer, magnet holder, stator casting body, cylinder and several quantity equality fixed permanent magnet and rotating permanent magnet, the active magnet holder can be set in the magnet retainer, the fixed permanent magnet and rotating permanent magnet are separately orientation arranged on the active and fixed magnet holder, the elastic device is connected with active magnet holder and cylinder. The advantages are: the elastic device and magnetic valve are combined to make the rotating permanent magnet rotate any degree based on the demand, so the braking moment can changes one-way continuously for driver to realize the stepless control of braking moment; it adopts ratio magnetic valve to control the operating stroke and pressure of cylinder, the work response of the permanent-magnet slack adjuster is quick, the pressure range of air supply is wide.

The invention relates to a lever loading type friction wear tester for controllable magnetic field environment. The tester comprise a magnetic field device, a lower sample piece is arranged in the magnetic field device, a driving mechanism drives the magnetic field device to reciprocate in the horizontal direction, a loading rod is arranged above the lower sample piece, a test steel ball is arranged at the lower end of the vertical loading rod, and abuts against the upper plate surface of the lower sample piece, the loading rod is arranged at one end of a lever, a level body is hinged onto anadjusting base, the two ends of the level are provided with counterweights respectively, and a strain gauge sensor is arranged on one side of the lever in the length direction and is used to collect torsion of lever deformation and transmit the torsion into a computer. According to the friction wear tester, an electromagnetic coil applies a magnetic field to a contact area of a friction pair, thelevel is used for loading to improve the loading stability, experimental parameters including the load, the relative movement speed of the friction pair and magnetic field intensity can be changed atthe same time, and friction characteristics of different friction pairs can be tested and analyzed.

The invention discloses a method of detecting biological molecules by a nano enzyme immune sandwich novel technology. The method comprises the following steps: (1) coupling a first monoclonal antibodyto first magnetic nano enzyme particles to obtain a capture probe; (2) coupling a second monoclonal antibody to second magnetic nano enzyme particles to obtain a detection probe; (3) incubating a to-be-detected sample and the capture probe; (4) obtaining a capture probe-antigen compound from a solution in the step (3); (5) resuspending the capture probe-antigen compound, adding the detection probe, and carrying out incubation; (6) obtaining a capture probe-antigen-detection probe compound from the solution in the step (5); (7) adding a peroxide and a catalytic primer to develop color, and detecting the light absorbance value of the solution through an enzyme-linked instrument; and (8) measuring biological molecules of known concentration and drawing a standard curve to obtain the antigencontent in the to-be-detected biological sample. The method is simple and rapid in operating step, environment-friendly and suitable for detecting various chemical or biological molecules.

The invention relates to a vehicle, a magnetorheological fluid type vehicle shock absorbing seat control device and a magnetorheological fluid type vehicle shock absorbing seat control method. The magnetorheological fluid type vehicle shock absorbing seat control device comprises a seat body, a damping assembly, an elastic sealing connection component, a box body, an acceleration sensor and an ECU, wherein the damping assembly comprises a damping plate which is fixedly connected to the bottom part of the seat body in a perpendicular manner, and a damping hole penetrating the damping plate; a magnetorheological fluid is internally packaged in the box body, and the box body is in sealing connection with the damping assembly by means of the elastic sealing connection component; the damping assembly suspends in the magnetorheological fluid and can be kept in a state of separation from the inner surface of the box body; the acceleration sensor is used for acquiring seat acceleration information and transmitting the seat acceleration information to the ECU; and the ECU is used for receiving the seat acceleration information acquired by the acceleration sensor, and calculating a current control quantity applied to the magnetorheological fluid according to the seat acceleration information, so as to control damping characteristics of the magnetorheological fluid flowing through the damping hole. The magnetorheological fluid type vehicle shock absorbing seat control device can realize the shock absorption of the seat body, and is conductive to enhancing the comfort of a passenger sitting on the seat.

The invention relates to a tile type shielding device of cylindrical permanent magnets, which comprises a stander, wherein the stander is provided with a supporting component, the supporting component comprises a left half shaft, a hollow cylindrical magnetic core shaft and a right half shaft; the hollow cylindrical magnetic core shaft is provided with two coaxial and parallel cylindrical permanent magnets; the two cylindrical permanent magnets are externally provided with a rotatable shielding body; the rotatable shielding body comprises two tile-shaped shielding boards; the two tile-shaped shielding boards are covered on outer cylindrical surface magnetic poles of the cylindrical permanent magnets; and the tile-shaped shielding boards are rotatablely arranged with the left half shaft and the right half shaft by rotating a connecting disc. The tile type shielding device has the characteristic of uniform forcing since the cylindrical permanent magnets are externally provided with the rotatable shielding body, can achieve the aim of changing the magnetic field intensity of different areas only by inputting smaller power through a power input wheel, and can from into a magnetic loop between the two tile-shaped shielding boards and the hollow cylindrical magnetic core shaft due to the design of the hollow cylindrical magnetic core shaft.

An embodiment of the invention provides an adsorption rod, vacuum laminating equipment and a control method of the vacuum laminating equipment, relates to the technical field of display panel manufacturing and can solve the problem that adsorption rods of vacuum laminating equipment cannot adjust the self-height. The adsorption rod comprises an electromagnetic assembly and an adsorption part, wherein the electromagnetic assembly comprises a slide bar as well as a fixed coil and a movable part which are arranged on the slide bar, the fixed coil winds around the periphery of the slide bar, the movable part comprises an elastic element and a movable magnet, a fixed end of the elastic element is fixedly connected with the slide rod, and a movable end of the elastic element is connected with the movable magnet; the adsorption part is fixedly connected with the movable magnet and exposed out of one end, far away from the fixed coil, of the movable magnet. Current passes through the fixed coil to produce a magnetic field, so that the movable magnet slides on the slide bar under the repulsive force action of the magnetic field.

The invention discloses a swing suppression energy dissipation device. The swing suppression energy dissipation device comprises a connection part and an energy dissipation part. The left and right sides of the energy dissipation part are each provided with an energy dissipation cylinder. The left and right energy dissipation cylinders belong to airtight cylindrical tubes. The energy dissipation cylinders contain magneto-rheological fluid. A magnet exciting coil is coiled on the periphery of each cylindrical tube and connected with a piezoelectric unit. The cylindrical tubes on the two sides are each internally provided with a rolling wheel. A gear is arranged between the two cylindrical tubes. The rolling wheels and the gear are fixed through a connecting shaft and can rotate coaxially. The connection part is composed of a hollow box-type tube in the middle and toothed plates on the left and right sides. Piezoelectric power generation units are arranged at the bottom end of the hollowbox-type tube and in the middle position of the interior of a main body of the energy dissipation part correspondingly. The two ends of each piezoelectric power generation unit are provided with pressure sensors. The box-type tube is internally provided with a mass body. The mass body is connected with the two ends of the box-type tube through springs. The toothed plates of the connection part are engaged with the gear of the energy dissipation part. The periphery of the whole energy dissipation part is totally enclosed.

The invention relates to a vertical variable magnetic field device which is applied to a low-temperature probe station system. The device comprises a top permanent magnet, a bottom permanent magnet, a sample holder and a plurality of support screws; one end of each support screw is fixed on the sample holder; the top permanent magnet is arranged on each support screw; and the bottom permanent magnet is arranged on the sample holder. The device of the invention changes the surface magnetic line density through precisely adjusting the altitude of the top permanent magnet under the condition that the interior of a TTP4 low-temperature probe station system housing in the company of Lakeshore<R> maintains the original high vacuum, thereby achieving the effect of changing a magnetic field. The invention has the advantages of simple and feasible scheme, low cost, stability, reliability, large change range of the magnetic field, and best compatibility with the system. Furthermore, the invention is favorable for wide popularization and application.

A non-contact large-clearance magnetically driving method comprises an active magnetic pole and a driven magnetic pole. The active magnetic pole is a U-shaped iron core with fixed position. Each pole of the U-shaped iron core is respectively provided with two coils with electric power conducting controlled by a sequential circuit. The coils are controlled to switching and switching-off according to the prescribed sequence to lead to that the state of magnetic field of two magnetic poles is switched circulatingly according to the prescribed sequence to generate a magnetic field coupling with the driven magnetic poles (permanent magnets) which are arranged at the upper part of the U-shaped iron core of the active magnetic pole to drive the driven magnet (permanent magnet) to rotate. The invention has the advantages of simple technique, reasonable structure, fixed position of the active magnetic pole, large effective clearance between the active magnetic pole and the driven magnetic pole, adjustable rotating speed and direction, being able to replace the mechanical transmission and good practicability. The method of the invention can be applied to industrial practice and is especially suitable for driving the intracardiac miniature blood pump. The method of the invention settles the insufficiency for providing energy driving power to the intracorporal blood pump driving system currently.

The invention relates to a cuboid permanent magnet reciprocating mobile magnetic conduction shielding device, which is provided with a frame, and is characterized in that: a middle part of the frame is provided with a cuboid permanent magnet, and a shield component which reciprocates along the surface of the permanent magnet is arranged at the periphery of the permanent magnet and comprises a C-shaped shield plate and a mobile bracket; one side of an opening of the shield plate is correspondingly provided with a magnetic conduction side plate which is in magnetic conduction connection with the C-shaped shield plate and is fixed on the frame; and the shield component is provided with a linear reciprocating driving mechanism, and is assembled with the frame through a slide rail structure. The cuboid permanent magnet reciprocating mobile magnetic conduction shielding device allows the magnetic field intensity of a disk permanent magnet to continuously change by utilizing the continuous rotation of a rotating shield, and has high shielding efficiency on a magnetic field.

The invention relates to a hub-type electromagnetic liquid cooling retarder which comprises a hub (4), an accelerating device, an oil liquid sealing device, a stator (13) and an excitation coil (14), wherein the hub (4) is connected with the rear axle (1) of an automobile; the accelerating device is connected with the hub (4); the oil liquid sealing device is connected with the accelerating device; the stator (13) is fixed on the rear axle (1) through a bolt; an internal groove is formed in the stator (13); the excitation coil (14) is coiled in the internal groove of the stator (13). The hub-type electromagnetic liquid cooling retarder has the advantages that an automobile brake drum is reformed into a gear ring serving as a part of an accelerating mechanism; the structure is simple; the braking torque and the braking power of the retarder can be improved; a rotor is light, so that the rotary inertia is low; the stator is directly fixed on the rear axle, so that the coiling of the excitation coil is simple.

The invention relates to a rotary shielding device for a tubular permanent magnet, which comprises a frame. A central shaft is arranged on the frame, and is provided with a magnetic core tube; the tubular permanent magnet is arranged outside the magnetic core tube; a rotary shielding body is arranged outside the tubular permanent magnet; the rotary shielding body comprises two tile shielding plates axially symmetrically arranged and magnetic end plates arranged at two ends of the tile shielding plates; the magnetic end plates arranged at two ends of the tile shielding plates are respectively provided with a rotary connecting piece; the rotary shielding body is rotatably arranged on the central shaft through the rotary connecting piece; and the magnetic end plates are magnetically connected with the magnetic core cylinder. By adopting the design of the magnetic end plates, the rotary shielding body and the magnetic core tube form a magnetic circuit, and when the tile shielding plates rotate, the tile shielding plates continuously switch the shielding areas of two tubular permanent magnet magnetic fields, so that an induction generator generates induction current.

The invention provides a vehicle seat. The vehicle seat comprises a seat body, a seat base, a front-back adjusting guide rail, a height adjuster, a plurality of magnetic levitation devices, a first sensor installed on a vehicle, a second sensor installed on the vehicle seat above the magnetic levitation devices, and an electronic controller electrically connected with the first sensor, the secondsensor and the magnetic levitation devices, wherein the electronic controller is configured to provide a control signal according to a first detection signal from the first sensor and a second detection signal from the second sensor to control the plurality of magnetic levitation devices so as to provide active shock absorption. The invention further provides a method for providing active shock absorption for the vehicle seat. By means of the vehicle seat, active shock absorption can be provided for the seat, the vibration of the seat along with the vehicle is weakened, and thus the comfort isimproved.