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234 results about "Magnetic rotation" patented technology
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Rare earth permanent magnet, making method, and permanent magnet rotary machine
ActiveUS20070017601A1Minimized eddy currentImprove remanenceMagnetic circuitInorganic material magnetismRare-earth elementSintered magnets
A rare earth permanent magnet is prepared from a sintered magnet body of a R1—Fe—B composition wherein R1 is a rare earth element inclusive of Y and Sc, by forming a plurality of slits in a surface of the magnet body, disposing a powder on the magnet body surface, the powder comprising an oxide of R2, a fluoride of R3, or an oxyfluoride of R4 wherein each of R2, R3, and R4 is a rare earth element, and heat treating the magnet body and the powder below the sintering temperature in vacuum or in an inert gas.
Owner:SHIN ETSU CHEM IND CO LTD
Sensorless control systems and methods for permanent magnet rotating machines
Systems and methods for controlling a rotating electromagnetic machine. The rotating machine, such as a permanent magnet motor or hybrid switched reluctance motor, includes a stator having a plurality of phase windings and a rotor that rotates relative to the stator. A drive is connected to the phase windings for energizing the windings. A controller outputs a control signal to the drive in response to an input demand such as a demanded speed or torque. Control methods (which can be implemented separately or in combination) include varying the gain of an estimator as a function of a demanded or estimated speed to position control system poles at desired locations, decoupling control system currents to achieve a constant torque with motor speed, compensating flux estimates of the estimator for saturation operation of the stator, estimating rotor position using averages of sample values of energization feedback, and calculating a trim adjusted speed error from a plurality of speed estimates.
Owner:COPELAND LP
Magnetically driven agitator with magnetic rotation detector
InactiveUS6065865AEffective rotationPrecise positioningTransportation and packagingRotary stirring mixersMagnetic tension forceMagnetic rotation
A magnetically driven agitator for a mixture contained in a recipient which agitator is supported by a collar hermetically mounted in a wall of the recipient and which collar is provided with a blind sleeve inside which is housed a drive shaft provided with a first magnetic coupling. A propelling screw is disposed around the blind sleeve and is provided with a second magnetic coupling adapted to cooperative with the first magnetic coupling for driving the propelling screw about an axis of rotation. A third magnetic element carried by the propelling screw is disposed opposite a cell for detecting the movement of the third coupling element during rotation of the propelling screw about the axis of rotation.
Owner:MIXEL
Magnetic rotation transmitting device, hermetic stirring unit, and electric furnace
InactiveUS20050206260A1Dynamo-electric brakes/clutchesRotary stirring mixersElectric arc furnaceMagnetic rotation
In order to provide a magnetic rotation transmitting device capable of obtaining a large transmitting torque without using a large-sized permanent magnet, in an axial-type magnetic rotation transmitting device, which includes a driving rotation body having one or plural magnetic line(s) in which plural first magnets (10A) are disposed in a circumferential direction on a first disk (11A) at almost equal intervals, a drive source rotationally driving a drive shaft of the driving rotation body, and a driven rotation body having one or plural magnet line(s) in which second magnets (20A) of the same number as the first magnets (10A) are disposed in the circumferential direction on a second disk (21A) at almost equal intervals, symmetrically disposed to, and magnetically coupled with the driving rotation body with a magnetic coupling gap and, which utilizes a magnetic operation and which allows the driven rotation body to rotate by rotationally driving the drive shaft by means of the drive source, the first magnet (10A) has a N-magnetic pole portion and a S-magnetic pole portion, and an extended surface of a boundary surface between the N-magnetic pole portion and the S-magnetic pole portion approximately overlaps with a driving center line as being a rotation center line of the driving rotation body, the second magnet (20A) has the N-magnetic pole portion and the S-magnetic pole portion, and the extended surface of the boundary surface between the N-magnetic pole portion and the S-magnetic pole portion approximately overlaps with a driven center line as being the rotation center line of the driven rotation body, adjacent and facing surfaces of the first magnets (10A) adjacent to each other on the first disk (11A) are disposed so that magnetic pole faces having the same polarity make pairs, and adjacent and facing surfaces of the second magnets (20A) adjacent to each other on the second disk (21A) are disposed so that the magnetic pole faces having the same polarity make pairs.
Owner:MAGUNEO
Testing apparatus for high temperature, superconducting, magnetic suspension and dynamic performance and testing method with the same
InactiveCN1963421AForce measurementMaterial analysis by electric/magnetic meansCircular discMagnetic rotation
This invention relates to high temperature super conductive magnetic float dynamic test device, wherein, the bottom socket motor drives stainless steel disc and its top ring high temperature superconductive float cargo magnetic rotation; the bottom L shape shell top has been loaded with cylinder to drive down supportive rack for sliding along rack; the supportive rack is loaded with motor cylinder along supportive rack down level movement; upper and middle slide boards are fixed with sensor test level guide force; middle board and its down slide board can slide for vertical sliding.
Owner:SOUTHWEST JIAOTONG UNIV
Electronic expansion valve
InactiveCN1789768ACompact structureReduce volumeOperating means/releasing devices for valvesLift valveMagnetic rotationEngineering
This invention relates to one electrical expansion valve, which comprises valve socket, coils connected to the valve cover tube and cover tube, wherein, the valve socket is opened with entrance and exit mouth and valve mouth connected; the said cover tube and valve socket form sealed chamber with one magnetic rotor part to sense the said coil magnetic rotation and to convert into axle direction; the magnetic rotor down end is located with one valve bar to lift with the said valve with top end located inside cover tube to match with brake part; the said valve socket is fixed with one screw and the rotor is set with one wire bar.
Owner:ZHEJIANG SANHUA CO LTD
Rare earth permanent magnet, making method, and permanent magnet rotary machine
ActiveUS7559996B2Improve remanenceEffective absorptionMagnetic circuitPermanent magnetsRare-earth elementSintered magnets
Owner:SHIN ETSU CHEM IND CO LTD
Magnetic Rotation-Angle Sensor and Angle-Information Processing Device
InactiveUS20080048654A1Overall design flexibilityIncrease the number ofUsing electrical meansConverting sensor output electrically/magneticallyInformation processingMagnetic rotation
A simple circuit configuration without increasing the number of magnetic poles of a magnet can be performed and angular resolution can be improved. The polarities is determined and the absolute values are compared in accordance with the rotation angle of a magnet (1) based on sensor output signals a and b outputted from the magnetic sensors (2) and (3) to produce polarity determination signals c and d and absolute-value-comparison signals e, f, and g. The rotation angle of the magnet (1) is determined based on the polarity determination signals c and d and the absolute-value-comparison signals e, f, and g to output a determination result signal h.
Owner:ASAHI KASEI ELECTRONICS CO LTD
Rotary table for permanent magnet rotating machine and method for manufacturing permanent magnet rotating machine
ActiveUS20100277025A1High dimensional accuracyIncrease productionMagnetic circuit rotating partsManufacturing stator/rotor bodiesRotary stageCopper wire
A method for assembling rotors which is applicable to a large axial gap type permanent magnet rotating machine is provided.A permanent magnet rotating machine comprising: a rotating shaft; at least two rotors comprising a table-like structure and permanent magnets attached thereto, the table-like structures being connected to the rotating shaft and being disposed in an axial direction of the rotating shaft; and a stator comprising a table-like structure and stator coils around which a copper wire is wound, said stator being disposed in a gap formed by the rotors so that the stator being separated from the rotating shaft, is manufactured by the following steps of: assembling the two rotors such that a predetermined gap is formed therebetween; and mounting the magnets on the table-like structures by inserting the magnet from the radially outer side of the table-like structures towards the center of the rotation with the assembled state being maintained.
Owner:SHIN ETSU CHEM IND CO LTD
Correction method for mining borehole clinometer probe tube
InactiveCN105804722ALow time requirementsEasy to operateSurveyGeological measurementsLeast squaresCorrection method
The invention discloses a correction method for a mining borehole clinometer probe tube. The correction method for the mining borehole clinometer probe tube comprises the steps that correction parameters are calculated through a recursive least square ellipsoid fitting process by collecting any position data of a magnetic sensor and an acceleration sensor in the three-dimensional non-magnetic rotary platform clinometer probe tube; misalignment errors between the magnetic sensor and the acceleration sensor in the three-dimensional non-magnetic rotary platform clinometer probe tube and a clinometer probe tube shell carrier are calculated through a least square planar fitting method by collecting the data of the magnetic sensor and the acceleration sensor in the three-dimensional non-magnetic rotary platform clinometer probe tube around the X axis and the Z axis; the errors of the magnetic sensor and the acceleration sensor and the soft and hard iron error of the magnetic sensor are obtained; and the misalignment errors between the magnetic sensor and the clinometer probe tube shell carrier as well as between the acceleration sensor and the clinometer probe tube shell carrier are corrected. According to the correction method for the mining borehole clinometer probe tube, the geomagnetic field and gravitational acceleration are used for correction, the errors of a three-axis sensor and the misalignment errors between the three-axis sensor and the coordinate system of the probe tube shell carrier are compensated, the inclination precision of the corrected mining borehole clinometer probe tube is + / -0.2 degree, and the precision of the azimuth angle of the corrected mining borehole clinometer probe tube is+ / -0.5 degree.
Owner:TAIYUAN UNIV OF TECH
Single-wavelength and single-fiber bidirectional light transceiving module assembly
ActiveCN102364364ACoupling light guidesElectromagnetic transceiversMagnetic rotationInternational standard
The invention relates to a single-wavelength and single-fiber bidirectional light transceiving module assembly, which comprises a transmitting terminal, a receiving terminal, a common terminal and an optical lens group, wherein the optical lens group comprises a first polarization optical splitter, a second polarization optical splitter, a third polarization optical splitter, a reflecting mirror, a 45-degree half-wave plate, a magnetic ring, a magnetic rotation sheet and a 22.5-degree half-wave plate; a polarization beam at the transmitting terminal passes through the first polarization optical splitter, the magnetic rotation sheet, the 22.5-degree half-wave plate and the second polarization optical splitter, and then is received by the common terminal; polarized light which is incident to the common terminal in the parallel direction passes through the second polarization optical splitter, the magnetic rotation sheet, the 22.5-degree half-wave plate, the first polarization optical splitter, the 45-degree half-wave plate and the third polarization optical splitter and then is received by the receiving terminal; and polarized light in the vertical direction passes through the second polarization optical splitter, the reflecting mirror and the third polarization optical splitter and then is received by the receiving terminal. The single-wavelength and single-fiber bidirectional light transceiving module assembly meets national and international standards completely in the aspect of main performance of light power, isolation, receiving sensitivity and the like, and is compatible with the conventional standard module completely in appearance.
Owner:福建中科百讯光电有限公司
Electromagnetic rotation and stability apparatus
A test machine for testing the physical properties of a test specimen is provided. The test machine includes a fixture that applies a first force on the test specimen in a first direction and utilizes magnetic force to bring about the rotation of a fixture to apply a second force on the test specimen in a second direction. The test machine can better simulate field applications where a material may experience, for example compression or tension at the same time it experiences a rotational moment.
Owner:BRIDGESTONE FIRESTONE NORTH AMERICAN TIRE
Magnetic rotation transmitting device, hermetic stirring unit, and electric furnace
InactiveUS7112904B2Dynamo-electric brakes/clutchesRotary stirring mixersMagnetic rotationElectric arc furnace
Owner:MAGUNEO
Evaluation of the integrity of depressed contacts by variation of the rotation of the pole-shaft
A device for measuring the wear of the contacts of a switchgear device is described. The switchgear device is of the open circuit breaker type with offset pole-shaft, and the movable contact is mounted on a sliding support. Measurement of the wear of the contacts is based on evaluation of the over-travel of the movable contact in the closed position when the latter slides in its support. This over-travel is determined by measuring the residual rotation of the pole-shaft, preferably by a contact-less magnetic rotation sensor.
Owner:SCHNEIDER ELECTRIC IND SAS
Multi-wavelength single-fiber bidirectional optical transceiver module and working method thereof
ActiveCN104991320ARealize multi-wavelength multiplexingRealize multiplexing of multiple wavelengthsCoupling light guidesMultiplexingTransceiver
The invention discloses a multi-wavelength single-fiber bidirectional optical transceiver module and a working method thereof. The multi-wavelength single-fiber bidirectional optical transceiver module comprises a transmitting end, a receiving end, a common end, and an optical transceiver assembly, wherein the transmitting end comprises a laser group, a collimation lens group and a wavelength division multiplexing optical assembly; the receiving end comprises a photodiode group, a convergence lens group and a wavelength division de-multiplexing optical assembly; the common end is the input / output port of an optical signal; the wavelength division multiplexing optical assembly comprises a first total-reflection mirror, a second total-reflection mirror, a first wavelength division multiplexing diaphragm and a second wavelength division multiplexing diaphragm; a wavelength division de-multiplexing optical assembly comprises an optical substrate, a first filter, a second filter, a third filter and a fourth filter; and the optical transceiver assembly comprises a first polarization light splitter, a magnetic rotation optical sheet, a 22.5-degree 1 / 2 wave plate, a first wave plate, a second polarization light splitter, a second wave plate, and a third polarization light splitter. According to the multi-wavelength single-fiber bidirectional optical module, input and output of multi-wavelength optical signals on the same fiber can be carried out, the size and the cost of the optical transceiver are reduced, the wavelength multiplexing diaphragm is easy to coat, the performance is better, and the cost is low.
Owner:福建中科百讯光电有限公司
Paint wastewater treatment system
InactiveCN102992533AExtended stayGood flocculation effectMultistage water/sewage treatmentWater/sewage treatment by flocculation/precipitationMagnetic rotationIron powder
The present invention provides a paint wastewater treatment system with characteristics of low investment and low running cost. The paint wastewater treatment system comprises a sewage tank, a flocculation pipeline, a first water pump, a second water pump, an agent addition device, a magnetic separation device and a clear water tank, wherein a water inlet pipe of the magnetic separation device is communicated with the sewage tank through the flocculation pipeline and the first water pump, a water outlet pipe of the magnetic separation device is communicated with the clear water tank through the second water pump, the agent addition device is communicated with the flocculation pipeline, and is sequentially provided with a sodium hydroxide addition device, a polyaluminum chloride addition device, a polyacrylamide addition device and a PF iron powder flocculant addition device along a wastewater flow direction, the magnetic separation device comprises a mud water separation tank provided with a water inlet pipe and a water outlet pipe, a magnetic rotation disc arranged inside the mud water separation tank through a rotation shaft, a mud scraping plate and a residue cleaning region, the rotation shaft is connected with a power device through a speed reducer, and the mud scraping plate is fixed between the residue cleaning region and the magnetic rotation disc, and contacts the magnetic rotation disc.
Owner:CHANGSHU KOHLER
Faraday rotator suitable for high-power opto-isolator
ActiveCN103278943AAchieve rotationSmall temperature coefficientCoupling light guidesNon-linear opticsMagnetic rotationOptical isolator
The invention discloses a Faraday rotator suitable for a high-power opto-isolator. The Faraday rotator comprises a thermal compensation crystal, a half-wave plate, an iron ring, a first magnetic rotation crystal, a second magnetic rotation crystal, a first magnet and a second magnet. The first magnetic rotation crystal, the thermal compensation crystal, the half-wave plate and the second magnetic rotation crystal are laid out in the forward sequence of a Z axis, the iron ring is connected to the outside of the thermal compensation crystal and the outside of the half-wave plate in a sleeved mode, the first magnet is connected to the outside of the first magnetic rotation crystal in a sleeved mode, and the second magnet is connected to the outside of the second magnetic rotation crystal in a sleeved mode. When used for the opto-isolator, the Faraday rotator enables the opto-isolator to meet the requirement for high power of hundreds of watts and improves isolation degrees by at least 3dB.
Owner:北京雷生强式科技有限责任公司
Faraday magnetic rotation transparent ceramic and preparation method thereof
ActiveCN102093054AHigh Verdet constantSimple preparation processMagnetic rotationOptical transmittance
The invention discloses faraday magnetic rotation transparent ceramic and a preparation method thereof. The structural formula of the transparent ceramic is shown as Tb3-xAxAl5-yByO12, wherein A is Tm, Lu, Y or Gd; B is Sc or Ga; x is more than or equal to 0 and less than or equal to 2.9; and y is more than or equal to 0 and less than or equal to 5. The preparation method comprises the following steps of: preparing raw materials according to the components of the transparent ceramic with the structural formula of Tb3-xAxAl5-yByO12; adding 0.3 to 0.7 weight percent of ethyl orthosilicate serving as an additive; performing ball-milling, drying and tableting on powder; pressing with cool isostatic pressure of over 200 Mpa to obtain a blank body; pre-sintering to remove organic components; and putting the blank body into a vacuum or hot-press sintering furnace for sintering to obtain the magnetic rotation transparent ceramic with the structural formula of Tb3-xAxAl5-yByO12. The ceramic has high optical transmittance and high Verdet constant in a visible-near infrared band. The preparation method has the advantages of simple preparation technology, low cost, nontoxic preparation process and the like.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Image capturing device
InactiveUS20120069238A1Smooth rotationHigh viscosityTelevision system detailsColor television detailsMagnetic rotationEngineering
A rotation body having an optical member is stored in an optical capsule that is filled with a liquid that is an anti-freeze solution. A magnetic rotation driver rotates the rotation body by applying a magnetic force in a rotation direction to a first magnetizer provided to the rotation body, and heats the liquid. Specifically, the stator core that configures the magnetic rotation driver is formed so that a surface opposing the first magnetizer fits along a curved surface of an outer surface of the optical capsule. The opposing surface is applied with a silicon grease and then firmly attached to the optical capsule. Thus, the entire opposing surface of the stator core acts as a thermal conduction path to more efficiently heat the liquid, thereby making it possible to stably rotate the rotation body even in a cold environment.
Owner:PANASONIC CORP
Switching arc magnetic field measurement device and method based on magneto-optic imaging
InactiveCN102253350AReal-time measurementImprove spatial resolutionMagnetic measurementsMeasurement deviceMagnetic rotation
The invention belongs to a switching arc testing technology, and relates to a switching arc magnetic field measurement device and method based on magneto-optic imaging. The measurement device comprises a laser, a polarizer, an expanded beam lens group, a light path separator, magneto-optic glass, an analyzer, a focusing lens group, a diaphragm, a CCD (Charge Coupled Device) camera and an image data processing system. In the device, on the basis of the magnetic rotation effect of a magneto-optic sensitive element and the polarization property of light, the magnetic field distribution around the arc is converted into a grey image of polarized light, and real-time measurement on the magnetic field around the arc is realized by a numerical image processing method with high space and time resolution. The method belongs to a nonintrusive detecting method, ensures that the structure of an arc extinguish chamber of a low-voltage switching electric appliance is not destroyed, has the characteristics of excellent electric insulation performance, interference resistance and the like, and can be used for experimental study and optimized design of low-voltage switching electric appliance products.
Owner:XI AN JIAOTONG UNIV
Magnetic rotation angle sensor
ActiveUS20060261804A1Measurement apparatus componentsSolid-state devicesMagnetic rotationMagnetic flux
In a magnetic rotation angle sensor for detecting a rotation angle of a detection target, a yoke covers outer circumferences of a magnet and a Hall device. One of the magnet and the magnetic flux density detection device rotates together with the detection target. The Hall IC is radially shifted from a rotation center of the detection target. The magnetic flux density detection device has a detection surface that is in parallel to one of a tangential direction and a normal direction of a turning circle. The magnet is magnetized in the one of the tangential direction and the normal direction of the turning circle.
Owner:DENSO CORP
High-efficiency stirring device for hairy crab bait
InactiveCN107051316AReduce consumptionSimple structureTransportation and packagingMixersMagnetic tension forceMagnetic rotation
The invention belongs to the technical field of equipment for hairy crab cultivation, and particularly relates to a high-efficiency stirring device for hairy crab bait. The high-efficiency stirring device comprises a stirring tank, wherein the stirring tank comprises an upper stirring tank and a lower stirring tank; the upper stirring tank is internally provided with an upper stirring unit for vertically stirring the bait; the lower stirring tank is internally provided with a lower stirring unit for vertically stirring the bait; and the lower stirring tank is further internally provided with a magnetic rotation unit for pushing the upper stirring unit and the lower stirring unit to perform vertical stirring in a magnetic repulsion manner. According to the device, the magnetic rotation unit, in a rotation process, repels and pushes the upper stirring unit and the lower stirring unit sequentially to accomplish stirring operation in a vertical stirring manner through the magnetic rotation unit, and the device has the advantages of being simple and effective in structure, convenient and quick in stirring operation, good in uniform stirring effect, appropriate in stirring intensity and low in energy consumption.
Owner:宣城市乐丰农业技术服务有限公司
Optical fiber one- and two-way bending curvature double-channel tracking monitor and monitoring method
ActiveCN104359653AGood application effectStable structureOptical apparatus testingMagnetic rotationEngineering
The invention discloses an optical fiber one- and two-way bending curvature double-channel tracking monitor and a monitoring method. The monitor comprises an optical fiber platform deck and optical fiber stress moving platform decks. A bending pond is disposed between the optical fiber stress moving platform decks at two ends. Each optical fiber stress moving platform deck is connected with a force bearing end through force transmission shafts, one side of the optical fiber stress moving platform deck is connected with a connecting rod dial, an auxiliary connecting rod dial is disposed on the connecting rod dial, the other side of the optical fiber stress moving platform deck is fixedly connected with a magnetic rotation optical fiber fastener, a platform deck transverse rail is disposed at the bottom of the optical fiber stress moving platform deck, a platform deck moving passage is arranged at the top of the optical fiber stress moving platform deck, a passage highly-elastic inner ring is disposed outside the platform deck moving passage, a crescent protecting end is disposed outside the passage highly-elastic inner ring, and the crescent protecting end is connected with a support rod through a screwing fixing shaft. The monitor has the advantages that equipment which is reliable, portable and multipurpose is provided for actual projects, and the monitor is efficient, easy to operate, low in cost, scientific and reasonable, multifunctional and high in adaptability.
Owner:HOHAI UNIV
Electromagnetic rotary drive and rotational device
ActiveUS10707734B2Compact configurationIncrease magnetomotive forceSynchronous machine detailsSynchronous motorsRotational axisMagnetic rotation
An electromagnetic rotary drive includes a contactlessly magnetically drivable rotor that is coil-free and free of permanent magnets and that includes a magnetically effective core, and a stator by which the rotor is contactlessly magnetically drivable about a desired axis of rotation in the operating state. The stator has a plurality of coil cores of which each includes a bar-shaped longitudinal limb extending from a first end in a direction in parallel with the desired axis of rotation up to a second end, all the first ends being connected by a reflux of windings generate an electromagnetic rotational field of which each surrounds one of the longitudinal limbs. The coil cores include a plurality of permanent magnets by which a permanent magnetic pre-magnetization flux can be generated.
Owner:LEVITRONIX
Magnetic rotation angle sensor
In a magnetic rotation angle sensor for detecting a rotation angle of a detection target, a yoke covers outer circumferences of a magnet and a Hall device. One of the magnet and the magnetic flux density detection device rotates together with the detection target. The Hall IC is radially shifted from a rotation center of the detection target. The magnetic flux density detection device has a detection surface that is in parallel to one of a tangential direction and a normal direction of a turning circle. The magnet is magnetized in the one of the tangential direction and the normal direction of the turning circle.
Owner:DENSO CORP
Faraday polarization apparatus
InactiveCN101533160AHigh local magnetic fieldHigh withstand laser powerNon-linear opticsMagnetic rotationMolecular physics
The invention relates to a Faraday polarization apparatus, which belongs to an optical passive device and is used for rotating the polarization direction of light according to the direction of a magnetic field. The Faraday polarization apparatus comprises a compound magnet, and fixing and adjusting parts, wherein the compound magnet is formed by clamping a central magnet block (5) with two groupsof cylindrical magnet units respectively comprising n first fan-shaped magnet blocks (4) and n second fan-shaped magnet blocks (6) in a magnetic shielding sleeve (7) with high magnetic permeability; the compound magnet is pressed tightly by an end cover (2) after being arranged in a casing (9); and a magnetic rotation rod sleeve (8) fixed with a magnetic rotation rod (3) is positioned in an innerhole of the compound magnet, both ends of the magnetic rotation rod sleeve are clamped by two adjustment sheets (1), and the relative position of the magnetic rotation rod (3) and the compound magnetcan be adjusted by adjusting the two adjustment sheets (1) at two ends simultaneously to achieve the aim of adjusting an rotation angle.
Owner:北京飞波激光技术有限公司
Magnetic rotation assembly capable of adjusting magnetic field and optical isolator
InactiveCN104898308AIncrease the magnetic field strengthLow costMagnetsNon-linear opticsMagnetic rotationOptical isolator
The invention is suitable for the field of lasers and provides a magnetic rotation assembly capable of adjusting a magnetic field. The magnetic rotation assembly comprises at least one group of magnetic ring arrays. Each group of magnetic ring arrays comprises a first magnetic ring, a second magnetic ring and a third magnetic ring. The first magnetic ring, the second magnetic ring and the third magnetic ring of each group of magnetic ring arrays are stacked up in an axial direction and fixed. At least one Faraday device is arranged in a central hole of each magnetic ring array and fixed. The direction of a first magnetic line of each first magnetic ring is a radial direction pointing towards the outside from the center. The direction of a second magnetic line of each second magnetic ring points towards the axial direction from the left to the right. The direction of a third magnetic line of each third magnetic ring is a radial direction pointing towards the center from the outside. By adjusting axial distances or up-down distances among each first magnetic ring, each second magnetic ring and each third magnetic ring, an adjustment can be made to the magnetic field. The invention further discloses an optical isolator. Therefore, the magnetic rotation assembly capable of adjusting the magnetic field and the optical isolator helps to save cost and ensures ideal angle of rotation by making an adjustment to the magnetic field.
Owner:MAXPHOTONICS CORP
Magnetic rotation glass and its preparation technology
InactiveCN100999384ALower melting temperatureVerdet constant is highGlass furnace apparatusMagnetic rotationCerium
This invention relates to a magnetic optical rotation glass, its components to molar percentage are: Tb2O3: 15 ~35 shares; B2O3 + SiO2: 40 ~ 80; Al2O3: 0 ~ 15; ZnO:0 ~ 30; ZrO2:0 ~ 6; AlF3 + MgF2+CaF2: 0 ~12; TiO2:0 ~ 10; InF3:0.5 ~ 7. First mix the raw materials according to composition; Preheat electric furnace to 1200 to 1300 deg C, add the mixed materials in the platinum crucible, when to 1350 to 1410 deg mix glass liquid for 3~ 5h; Reduce temperature to 1250 to 1350 deg C, pour glass liquid into the mold, precisely annealing in the annealing furnace. This invention use one time melting way, solve the problem of high temperature of glass clarification and leveling in the background technology, Rumsfeld constant is higher than the international common terbium magneto-optical glass, much higher than the magneto-optical glass containing cerium.
Owner:XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
Magnetic rotation detector, relative vehicle control device and method for judging abnormal of roter
InactiveCN1550782ATesting/calibration of speed/acceleration/shock measurement devicesDevices using electric/magnetic meansMagnetic rotationMagnetic flux
Owner:TOYOTA JIDOSHA KK +1
Digital optical fiber current sensor
InactiveCN101846703AVoltage/current isolationMeasurement using digital techniquesMagnetic rotationDc current
The invention relates to a digital optical fiber current sensor. The fundamental principle is that: based on a Faraday magnetic rotation effect, a polarization plane of linearly polarized light passing through a magneto-optical crystal can rotate under the action of the magnetic field of the current and the rotary angle is in direct proportion to the magnitude of the current. The polarization directions of an annular analyzer are distributed uniformly in a radial direction in a 180-degree annular region; the linearly polarized light consistent with a certain polarization direction on the annular analyzer can pass through the analyzer; the linearly polarized light vertical to the polarization direction cannot pass through the analyzer; and therefore, the intensity of the polarized light passing through the analyzer in a certain 90-degree region on the annular analyzer is decreased gradually from maximum to minimum, a light intensity distribution image is formed, the maximum or minimum light intensity position can be found through the analyzing process of a CMOS / CCD image sensor, the rotary angle of the polarized light is determined, and the real-time digital quantity of a current signal is acquired. A current measuring method is linear, so that the method is suitable for the measurement of alternating current and also can be suitable for the measurement of direct current.
Owner:FUZHOU UNIV
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