CN203909058U - Magnetofluid compound angular velocity sensor - Google Patents
Magnetofluid compound angular velocity sensor Download PDFInfo
- Publication number
- CN203909058U CN203909058U CN201420160821.7U CN201420160821U CN203909058U CN 203909058 U CN203909058 U CN 203909058U CN 201420160821 U CN201420160821 U CN 201420160821U CN 203909058 U CN203909058 U CN 203909058U
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- Prior art keywords
- magnetic
- mfc
- solenoid
- permanent magnet
- magnetic field
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 17
- 239000007787 solid Substances 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims abstract description 10
- 239000000696 magnetic material Substances 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 239000006249 magnetic particle Substances 0.000 claims abstract description 6
- 239000011553 magnetic fluid Substances 0.000 claims description 21
- 238000005339 levitation Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 208000032365 Electromagnetic interference Diseases 0.000 abstract 1
- 238000002955 isolation Methods 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 230000008859 change Effects 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000005486 microgravity Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
Abstract
The utility model discloses a magnetofluid compound angular velocity sensor; a metal housing is a cylinder container formed by soft-magnetic material and used for containing a mechanical structure and a circuit, and used for shielding extraneous electromagnetic interferences; a bottom of the metal housing is provided with a screw hole used for fixing the whole angular velocity sensor on a tested object; MFC refers to a three phase solution formed by a con conductive base fluid, magnetic particles and nonmagnetic solid particles; a permanent magnet is a cylinder permanent magnet and used for providing gradient magnetic field, so the MFC can generate magnetofluid gravity suspension effect; a solenoid winds on a 24-slot stator so as to generate a rotation magnetic field, so the nonmagnetic solid particles in the MFC can reversely spin; the soft magnet is used for shielding magnetic field interferences generated in a crossing portion of the solenoid; a three-phase AC current generation circuit is used for generating three-phase AC voltage, and the voltage can be loaded on the solenoid to generate the rotation magnetic field through an isolation circuit; the magnetofluid compound angular velocity sensor is low in cost, high in linearity, and high in sensitivity.
Description
Technical field
The utility model relates to angular-rate sensor field, relates in particular to a kind of magnetic liquid in magnetic fluid compound and angular-rate sensor of non magnetic composition spinning effect of utilizing.
Background technology
Magnetic liquid (Magnetic Fluid is called for short MF) is made up of the magnetic particle, stabilizing agent and the base fluid that are suspended in base fluid, with a kind of new function material of mobility and electro permanent magnetic dual nature.If the non magnetic solid particle (about 100-5000nm) that adds third phase to be made by different materials in magnetic fluid; and this non magnetic solid particle also has electric conductivity (metal or coated metal); magnetic fluid compound (Magnetic Fluid Composites is called for short MFC) will show the attribute of unique optics, electromagnetics and mechanical rheology aspect so.At home, the sensor taking magnetic liquid as core has just just entered the research starting stage at home, less to the research of magnetic liquid inertial sensor.
Because quality, the density of non-magnetic particle in MFC are general different from magnetic fluid, MFC generally need work under Microgravity condition.Otherwise the non magnetic solid constituent in MFC (three-phase fluid) will be deposited to the bottom of container or move on to the upper strata (unless non magnetic composition is identical with quality, the density of magnetic fluid) of liquid in containers under gradient gravity.To under earth environment, use this MFC, need to be at the additional gradient magnetic of vertical direction, magnetic fluid solution has levitation effect (producing a power upwards that is greater than conventional buoyancy) under this gradient magnetic, and non-magnetic material is wherein suspended in solution.Like this, non-magnetic material equivalence is under microgravity environment.In Microgravity, the non magnetic composition of MFC is stable without magnetic gradient, whole MFC system macroscopic view homogeneous.Like this, small additional physical field just can affect MFC liquid internal structure and attribute, makes it to occur correlation effect, shows specific optics, electromagnetics and mechanical rheological characteristics etc.
Utility model content
The utility model provides a kind of magnetic fluid compound angular-rate sensor, and the utility model utilizes magnetic liquid and the non magnetic composition spinning effect in magnetic fluid compound to propose a kind of novel angular-rate sensor, described below:
A kind of magnetic fluid compound angular-rate sensor, described magnetic fluid compound angular-rate sensor comprises: metal shell, MFC, permanent magnet, 24 groove stators, solenoid, soft magnetic bodies, and external three-phase alternating current circuit for generating,
Described metal shell is the cylindrical container that soft magnetic material forms, and for holding physical construction and circuit, and shields outside electromagnetic interference, and described metal shell bottom is provided with threaded hole, for whole angular-rate sensor is fixed on to testee;
The three-phase solution that described MFC is made up of non-conductive base fluid, magnetic particle and non magnetic solid particle;
Described permanent magnet is cylindric permanent magnet, for gradient magnetic is provided, makes described MFC produce magnetic fluid levitation effect;
Described solenoid is wrapped on described 24 groove stators, and described 24 groove stators and described solenoid, for generation of rotating magnetic field, make the non magnetic solid particle reversed spin in described MFC;
The magnetic interference that described soft magnetic bodies produces for shielding described solenoid infall;
Described three-phase alternating current circuit for generating, for generation of three-phase alternating voltage, is loaded on described solenoid and is produced rotating magnetic field by buffer circuit.
The beneficial effect of the technical scheme that the utility model provides is: utilize the electromagnetic attributes of magnetic fluid compound uniqueness and the New Magnetic Field Controlled fluid inertia gravity sensor of mechanical rheological characteristics to have low cost, high linearity, highly sensitive feature, change in occasion in quasistatic and low frequency inertia gravitation especially, there is high linearity and sensitivity response.
1, the utility model novel structure, does not have solid moving-member, does not have mechanical wear, therefore has high reliability, high strength, long-life feature;
2, the utlity model has low cost, high linearity, highly sensitive feature, change in occasion in quasistatic and low frequency inertia gravitation especially, there is high linearity and sensitivity response.
Brief description of the drawings
Fig. 1 is vertical view of the present utility model.
Wherein: 1,2,3 and 4-screw; 5-end cap.
Fig. 2 is cut-open view A-A corresponding in Fig. 1.
Wherein: 3,4-screw; 5-end cap; 6-metal shell; 7-screw thread; 8-screw; 10-circuit platform; 11-upward wiring plate; The upper soft magnetic bodies of 12-; The upper soft magnetic bodies support of 13-; The upper permanent magnet of 14-; The upper permanent magnet support of 15-; 16-MFC; 17-24 groove stators; Permanent magnet under 18-; Soft magnetic bodies support under 19-; Soft magnetic bodies under 20-; 21-downward cabling plate; 9,22-backstay.
Fig. 3 is the schematic diagram of upper and lower wiring board of the present utility model, upper and lower soft magnetic bodies support and upper and lower permanent magnet support.
Fig. 4 is the schematic diagram of 24 groove stators.
Fig. 5 is assembling decomposing schematic representation of the present utility model (screw and backstay do not draw, and wherein the label of screw (23,24,25 and 26) has been marked on corresponding threaded hole).
Fig. 6 is that generation phase difference output is the electrical schematic diagram (needing to add buffer circuit between this circuit and solenoid, not shown in FIG.) of the three-phase alternating voltage of 120 °.
Fig. 7 is that three-phase 24 groove windings are wound around planimetric map.U
1and U
2the all 0 ° sinusoidal voltage of access by buffer circuit but current direction is contrary, V
1and V
2the all 120 ° sinusoidal voltages of access by buffer circuit but current direction is contrary, U
1and U
2the all 240 ° sinusoidal voltages of access by buffer circuit but current direction is contrary.Direction of current as shown in the figure.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below the utility model embodiment is described in further detail.
A kind of magnetic fluid compound angular-rate sensor, comprise: metal shell 6, MFC16, permanent magnet (upper permanent magnet 14 and lower permanent magnet 18), 24 groove stators 17, solenoid (not shown), soft magnetic bodies (upper soft magnetic bodies 12 and lower soft magnetic bodies 20), and external three-phase alternating current circuit for generating.
Metal shell 6, for the cylindrical container that soft magnetic material forms, for holding physical construction and the circuit of angular-rate sensor, and shields outside electromagnetic interference, and metal shell 6 bottoms are provided with threaded hole, for whole angular-rate sensor is fixed on to testee.
The three-phase solution that MFC16 is made up of non-conductive base fluid, magnetic particle and non magnetic solid particle.
Permanent magnet is cylindric permanent magnet, for gradient magnetic is provided, makes MFC16 produce magnetic fluid levitation effect, thereby non magnetic solid particle is suspended in solution equably.
Solenoid is wrapped on 24 groove stators 17, and 24 groove stators 17 and solenoid, for generation of rotating magnetic field, make the non magnetic solid particle reversed spin in MFC16.
The magnetic interference that soft magnetic bodies produces for shielding solenoid infall.
Three-phase alternating current circuit for generating is for generation of three-phase alternating voltage, is loaded into and on solenoid, produced rotating magnetic field by buffer circuit.This circuit is that those skilled in the art are in common knowledge, and the utility model embodiment does not repeat this.
This angular-rate sensor is the reversed spin motion of doing under the effect of rotating magnetic field by the non-magnetic material in MFC16 around z axle, and the direction of its angular momentum is also along z axle.In the time that whole angular-rate sensor has the additional angular momentum along x axle or y axle (z axle is orthogonal for x, y), the quality factor of circuit change, and within the scope of certain gyro frequency, the inverse of quality factor is linear with the additional angular velocity rotatablely moving.
Below in conjunction with the structure of detailed this angular-rate sensor of description of accompanying drawing, described below:
Fig. 1 is vertical view of the present utility model.This Figure illustrates screw 1,2,3 and 4 and be along the circumferential direction uniformly distributed on end cap 5, effect is to be connected with metal shell 6.
Fig. 2 is cut-open view A-A corresponding in Fig. 1.The backstay that downward cabling plate 21 is inserted to backstay 9 and 22(fore-and-aft direction is not shown).Lower soft magnetic bodies 20 is combined to rear insertion backstay 9 and 22 with lower soft magnetic bodies support 19.24 groove stators 17 and lower permanent magnet 18 are combined to rear insertion backstay 9 and 22.And the assembly combining with backstay is put into metal shell 6.Pour into MFC16 in 24 locating slots 17 after, be coated in 24 locating slot 17 upper surfaces with glue, upper permanent magnet frame 15 and upper permanent magnet 14 are combined after rear insertion backstay 9 and 22 simultaneously, make permanent magnet frame 15 lower surfaces and 24 locating slot 17 upper surface gummeds.Upper soft magnetic bodies frame 13 and upper soft magnetic bodies 12 are combined to insertion backstay 9 and 22.Upward wiring plate 11 is inserted to backstay 9 and 22.After circuit platform 10 and circuit board etc. are combined, with unshowned screw in screw 8(and Fig. 2) be fixed on upward wiring plate 11.End cap 5 is connected by screw 1,2,3 and 4 with metal shell 6.Screw thread 7 is for whole angular-rate sensor is fixed on testee.
Fig. 3 is the schematic diagram of upper and lower wiring board of the present utility model, upper and lower soft magnetic bodies support and upper and lower permanent magnet support.Groove shape in figure is used for the coil cabling that produces rotating magnetic field.Circular hole is used for inserting backstay 9 and 22.
Fig. 4 is the schematic diagram of 24 groove stators.As shown in Figure 4, groove shape is used for the coil cabling that produces rotating magnetic field, and middle circle column space is for holding MFC.Circular hole is used for inserting backstay 9 and 22.
Fig. 5 is assembling decomposing schematic representation of the present utility model (screw and backstay do not draw, and wherein the label of screw has been marked on corresponding threaded hole).Install and form according to order as shown in the figure.
Fig. 6 is that generation phase difference output is the electrical schematic diagram of the three-phase alternating voltage of 120 °, is input as 50Hz sinusoidal voltage.When specific implementation, can also adopt other three-phase alternating voltage to produce circuit, the utility model embodiment is not restricted this.
Fig. 7 is that three-phase 24 groove windings are wound around planimetric map.U
1and U
2the all 0 ° sinusoidal voltage of access by buffer circuit but current direction is contrary, V
1and V
2the all 120 ° sinusoidal voltages of access by buffer circuit but current direction is contrary, U
1and U
2the all 240 ° sinusoidal voltages of access by buffer circuit but current direction is contrary.Direction of current as shown in the figure.
The principle of work of a kind of magnetic fluid compound angular-rate sensor described in the utility model is as follows:
After being wound around in 24 locating slots 17 according to the solenoid shown in Fig. 7, when giving solenoid input phase poor while being the three-phase alternating current of 120 °, can produce the rotating magnetic field of rotating around z axle, thereby the magnetisable material in MFC solution is followed rotating magnetic field and is rotated, acting force between magnetisable material and non-magnetic material in MFC solution makes non-magnetic material produce reversed spin motion, the direction of its moment of inertia is along z axle, and z direction of principal axis as shown in Figure 2.When whole sensor has, along x axle or y axle, (z axle is orthogonal for x, y, x and y direction of principal axis are as shown in Figure 1) additional angular momentum time, the quality factor of circuit change, and within the scope of certain gyro frequency, the inverse of quality factor is linear with the additional angular velocity rotatablely moving.
The utility model embodiment to the model of each device except do specified otherwise, the model of other devices does not limit, and all can as long as can complete the device of above-mentioned functions.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, above-mentioned the utility model embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (1)
1. a magnetic fluid compound angular-rate sensor, is characterized in that, described magnetic fluid compound angular-rate sensor comprises: metal shell, MFC, permanent magnet, 24 groove stators, solenoid, soft magnetic bodies, and external three-phase alternating current circuit for generating,
Described metal shell is the cylindrical container that soft magnetic material forms, and for holding physical construction and circuit, and shields outside electromagnetic interference, and described metal shell bottom is provided with threaded hole, for whole angular-rate sensor is fixed on to testee;
The three-phase solution that described MFC is made up of non-conductive base fluid, magnetic particle and non magnetic solid particle;
Described permanent magnet is cylindric permanent magnet, for gradient magnetic is provided, makes described MFC produce magnetic fluid levitation effect;
Described solenoid is wrapped on described 24 groove stators, and described 24 groove stators and described solenoid, for generation of rotating magnetic field, make the non magnetic solid particle reversed spin in described MFC;
The magnetic interference that described soft magnetic bodies produces for shielding described solenoid infall;
Described three-phase alternating current circuit for generating, for generation of three-phase alternating voltage, is loaded on described solenoid and is produced rotating magnetic field by buffer circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420160821.7U CN203909058U (en) | 2014-04-03 | 2014-04-03 | Magnetofluid compound angular velocity sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420160821.7U CN203909058U (en) | 2014-04-03 | 2014-04-03 | Magnetofluid compound angular velocity sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203909058U true CN203909058U (en) | 2014-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420160821.7U Expired - Lifetime CN203909058U (en) | 2014-04-03 | 2014-04-03 | Magnetofluid compound angular velocity sensor |
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| CN (1) | CN203909058U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941034A (en) * | 2014-04-03 | 2014-07-23 | 天津大学 | Magnetofluid composite angular velocity sensor |
| CN108801306A (en) * | 2018-06-26 | 2018-11-13 | 京东方科技集团股份有限公司 | Fibre optical sensor and preparation method thereof, motion sensing apparatus |
| CN110208567A (en) * | 2019-05-28 | 2019-09-06 | 南方科技大学 | Contactless magnetic fluid rotation-speed measuring device, design method and rotating speed measurement method |
| WO2020238405A1 (en) * | 2019-05-28 | 2020-12-03 | 南方科技大学 | Gear-type magnetic fluid-based rotational speed sensor and manufacturing method thereof |
-
2014
- 2014-04-03 CN CN201420160821.7U patent/CN203909058U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941034A (en) * | 2014-04-03 | 2014-07-23 | 天津大学 | Magnetofluid composite angular velocity sensor |
| CN108801306A (en) * | 2018-06-26 | 2018-11-13 | 京东方科技集团股份有限公司 | Fibre optical sensor and preparation method thereof, motion sensing apparatus |
| WO2020001425A1 (en) * | 2018-06-26 | 2020-01-02 | 京东方科技集团股份有限公司 | Fiber optic sensor and method for manufacturing same, and motion sensing device |
| US11408908B2 (en) | 2018-06-26 | 2022-08-09 | Beijing Boe Optoelectronics Technology Co., Ltd. | Fiber optic sensor, manufacturing method thereof and motion sensing device |
| CN110208567A (en) * | 2019-05-28 | 2019-09-06 | 南方科技大学 | Contactless magnetic fluid rotation-speed measuring device, design method and rotating speed measurement method |
| WO2020238405A1 (en) * | 2019-05-28 | 2020-12-03 | 南方科技大学 | Gear-type magnetic fluid-based rotational speed sensor and manufacturing method thereof |
| WO2020238402A1 (en) * | 2019-05-28 | 2020-12-03 | 南方科技大学 | Non-contact magnetic fluid rotational speed measuring device, design method and rotational speed measuring method |
| CN110208567B (en) * | 2019-05-28 | 2023-10-20 | 南方科技大学 | Non-contact magnetic fluid rotating speed measuring device, design method and rotating speed measuring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141029 |