CN203432587U - Magnetic fluid gyroscope - Google Patents

Magnetic fluid gyroscope Download PDF

Info

Publication number
CN203432587U
CN203432587U CN201320573181.8U CN201320573181U CN203432587U CN 203432587 U CN203432587 U CN 203432587U CN 201320573181 U CN201320573181 U CN 201320573181U CN 203432587 U CN203432587 U CN 203432587U
Authority
CN
China
Prior art keywords
metal shell
stem
magnetic fluid
hole
gland
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn - After Issue
Application number
CN201320573181.8U
Other languages
Chinese (zh)
Inventor
李醒飞
徐梦洁
于翔
王丽萍
梁思夏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianjin University
Original Assignee
Tianjin University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tianjin University filed Critical Tianjin University
Priority to CN201320573181.8U priority Critical patent/CN203432587U/en
Application granted granted Critical
Publication of CN203432587U publication Critical patent/CN203432587U/en
Anticipated expiration legal-status Critical
Withdrawn - After Issue legal-status Critical Current

Links

Images

Landscapes

  • Gyroscopes (AREA)

Abstract

The utility model discloses a magnetic fluid gyroscope. An inward concave stud hole is formed in the outer bottom of a metal shell; a permanent magnet, a seal housing, a core column, a pressing sleeve and a threaded gland are arranged in the metal shell; the bottom of the permanent magnet is connected to the inner bottom surface of the metal shell; the seal housing is arranged on the permanent magnet and wraps the periphery of the outer periphery of the permanent magnet; a seal ring is arranged at the outer periphery of the seal housing; the bottom end face of the core column is connected to the central part of the upper end face of the seal housing; the upper end face of the core column recesses inwards along the axial direction to form an inner electrode hole; the pressing sleeve is axially provided with a run-through hole and is sleeved on the outer circumference of the core column through the run-through hole; a fluid passage is formed between the bottom end face of the pressing sleeve and the upper end face of the seal housing; a magnetic fluid is arranged in the fluid passage; the threaded gland is embedded in a space formed by the pressing sleeve and the inner periphery of the metal shell, is in threaded connection with the inner circumference of the metal shell and is symmetrically provided with two outer electrode holes. The magnetic fluid gyroscope has the characteristics of high reliability, high strength and long life, and can stably work under the severe environment of strong impact.

Description

A kind of magnetic fluid gyro
Technical field
The utility model relates to a kind of gyro.Particularly relate to a kind of angular oscillation sensor based on magnetic fluid to vibration acceleration and the insensitive magnetic fluid gyro of quadrature axis angular velocity.
Background technology
At present, spacefaring nation is all competitively developing satellite platform and the application technologies such as high resolving power earth observation, high precision sensing.It is to realize the prerequisite and basis that the useful load high-precision attitudes such as satellite platform and remote sensing system point to that the micro-angular oscillation of satellite is measured with controlling.
Provide the gyro of the micro-angular oscillation information of satellite to have concurrently to be with the characteristics such as roomy (approaching 1KHz), volume are little, lightweight, life-span length, shock resistance, and be that traditional mechanical gyro or optical fibre gyro, MEMS gyro all can not have these characteristics concurrently at present.Therefore, be necessary in fact to propose the needs that a kind of Gyros is measured to meet micro-angular oscillation.
Summary of the invention
Technical problem to be solved in the utility model is, provide a kind of and there is high reliability, high strength, long-life, be with roomy, power consumption is little, volume is little, lightweight, cost is low and to vibration acceleration and the insensitive magnetic fluid gyro of quadrature axis angular velocity.
The technical scheme that the utility model adopts is: a kind of magnetic fluid gyro, include metal shell, and it is characterized in that, the outer bottom of described metal shell is formed with inwardly recessed stud bolt hole, and the inside of described metal shell is provided with:
Permanent magnet, the bottom of described permanent magnet is connected on the inner bottom surface of metal shell;
Sealing shroud, described sealing shroud is arranged on permanent magnet, and wraps the neighboring of described permanent magnet, and the neighboring of described sealing shroud is provided with O-ring seal;
Stem stem, the bottom face of described stem stem is connected to the central part of described sealing shroud upper surface, in the upper surface of described stem stem, is inwardly recessedly vertically formed with interior electrode hole;
Gland, described gland is axially formed with through hole, and by this through hole, is enclosed within the periphery of described stem stem, between the bottom face of described gland and the upper surface of described sealing shroud, is formed with fluid passage, in described fluid passage, is provided with magnetic fluid;
Union (screwed)bonnet (UB, is embedded in the formed space of inside circumference of described gland and described metal shell, and is threaded with the inside circumference of described metal shell, symmetrically on described union (screwed)bonnet (UB is provided with two external electrode holes.
The sensitive axes of the axis of described metal shell, stud bolt hole, permanent magnet, sealing shroud, stem stem, gland and union (screwed)bonnet (UB and this magnetic fluid gyro is on same axis.
On the inner peripheral surface of described metal shell with described gland and described union (screwed)bonnet (UB corresponding section, being formed with respectively under metal shell hole on hole shoulder and metal shell takes on, the neighboring of described gland bottom is pressed in hole under described metal shell and takes on above, and on the metal shell described in the neighboring of described union (screwed)bonnet (UB is pressed in, take in hole.
Described sealing shroud is disc-shaped structure, bottom at this disc-shaped structure is formed with groove, described permanent magnet is embedded in this groove, and with sealing shroud be interference fit, on the lateral circle surface of this disc-shaped structure, be formed with an inwardly recessed circle groove, described O-ring seal is embedded in this described circle groove.
Described stem stem is the axle of the ladder-type structure of two shaft parts, on the outer peripheral face of stem stem, is formed with for supporting the stem stem shaft shoulder of gland.
Described gland includes the chassis sleeve column that be formed on center chassis vertical with one, along described chassis and sleeve column be axially formed with up/down perforation for being inserted in the through hole of stem stem, the inside circumference of bottom, described chassis is pressed on the stem stem shaft shoulder that is formed on stem stem outer peripheral face, and the neighboring of bottom, described chassis is pressed under the metal shell on the inner peripheral surface that is formed on metal shell on the shoulder of hole.
Described chassis respectively with the stem stem shaft shoulder and metal shell under the contact position of hole shoulder be provided with the epoxide-resin glue for preventing that magnetic fluid is excessive.
Described union (screwed)bonnet (UB is disc-shaped structure, at central part, be formed with for being inserted in the through hole of gland, in outside circumference, be formed with the external thread being connected with the internal thread of described metal shell, on the upper surface of described disc-shaped structure, two chuck holes of assembling are convenient in symmetrical being formed with.
A kind of magnetic fluid gyro of the present utility model, is full of by magnetic fluid the fluid passage that the upper lower wall of an inside and outside wall conduction insulate, and fluid passage is in the direction high-intensity magnetic field identical with input sensitive axes direction.When there is the turning rate input coaxial with sensitive axes in the external world, magnetic fluid and fluid passage produce relative motion, under magnetic fields, on the inside and outside wall of fluid passage, produce electric potential difference, after being processed, obtain the signal relevant to input angular velocity by detection system.The utility model is based on new principle, and novel structure, does not have solid moving-member, does not have mechanical wear, therefore has high reliability, high strength, long-life feature; Loop configuration design has greatly reduced the sensitivity to vibration acceleration and quadrature axis angular velocity, therefore can be at the steady operation under rugged environment extremely such as thump; The principle of work of relative motion makes prime sensor bandwidth there is no in theory the upper limit, and the whole system bandwidth upper limit only determines by signal processing circuit filtering link, so bandwidth very large (can surpass 1KHz); Prime sensor itself, without power supply, only have signal processing circuit to need power supply, so power consumption is little; In addition this structure can be accomplished small size, little weight, low cost.In sum, this invention possesses micro-angular oscillation and measures required characteristic.Advantage of the present utility model and beneficial effect are specific as follows:
1, the utility model is based on MHD effect (MHD), to be different from mechanical gyro (dynamic tuned gyroscope, liquid floated gyroscope, electrostatic gyroscope etc.), optical gyroscope (laser gyro, optical fibre gyro), MEMS gyro Gyros, be the innovation on gyro principle;
2, 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;
Therefore 3, the annular fluid passage structure adopting in the utility model has greatly reduced the sensitivity to vibration acceleration and quadrature axis angular velocity, can be at the steady operation under rugged environment extremely such as thump;
4, the principle adopting in the utility model makes prime sensor bandwidth there is no in theory the upper limit, and the whole system bandwidth upper limit only determines by signal processing circuit filtering link, so bandwidth very large (can surpass 1KHz);
5, in the utility model, prime sensor itself, without power supply, only have signal processing circuit to need power supply, so power consumption is little;
6, in the utility model, fluid passage effective width only needs mm magnitude just can obtain enough output signals, so the utility model can be accomplished small size, little weight.In addition the gyro (except MEMS gyro) that, the utility model is compared other type all has obvious cost advantage.
Accompanying drawing explanation
Fig. 1 is the front view of a kind of magnetic fluid gyro of the present utility model;
Fig. 2 is the vertical view of a kind of magnetic fluid gyro of the present utility model;
Fig. 3 is the structural representation of the gland in a kind of magnetic fluid gyro of the present utility model;
Fig. 4 is the principle of work schematic diagram of a kind of magnetic fluid gyro described in the utility model;
Fig. 5 is amplitude frequency curve and the phase frequency curve of a kind of magnetic fluid gyro described in the utility model.
In figure:
1: metal shell 2: internal thread
3: stud bolt hole 4: permanent magnet
5: sensitive axes 6: sealing shroud
7: O-ring seal 8: fluid passage
9: magnetic fluid 10: stem stem
11: interior electrode hole 12: gland
13: hole shoulder 14 under metal shell: the stem stem shaft shoulder
15: union (screwed)bonnet (UB 16: external electrode hole
17: hole shoulder 18 on metal shell: chuck hole
19: magnetic induction line
Embodiment
Below in conjunction with embodiment and accompanying drawing, a kind of magnetic fluid gyro of the present utility model is described in detail.
As shown in Figure 1 and Figure 2, a kind of magnetic fluid gyro of the present utility model, include metal shell 1, the outer bottom of described metal shell 1 is formed with inwardly recessed stud bolt hole 3, conveniently magnetic fluid gyro 100 is fixed on tested carrier, stud bolt hole axis overlaps with the sensitive axes 5 of magnetic fluid gyro 100.Described metal shell 1 profile is right cylinder, in the gland 12 described in the face of the inner peripheral surface up and down of this metal shell 1 and described union (screwed)bonnet (UB 15 corresponding sections, be formed with respectively under metal shell hole shoulder 17 on hole shoulder 13 and metal shell, the neighboring of gland described below 12 bottoms is pressed in hole under described metal shell and takes on 13, and the neighboring of union (screwed)bonnet (UB 15 described below is pressed in hole on described metal shell and takes on 17.Described metal shell 1 material should be selected the soft magnetic material with high saturation magnetic flux density, can select ferrocobalt (especially vanadium iron cobalt-base alloy) or iron-nickel alloy, can avoid like this enclosure interior transducing part to be subject to outside electromagnetic interference impact, can coordinate again permanent magnet 4 to form closed magnetic circuit simultaneously.
The inside of described metal shell 1 is provided with:
Permanent magnet 4, the bottom of described permanent magnet 4 is connected on the inner bottom surface of metal shell 1.The material of permanent magnet 4 should be selected the permanent magnetic material that high-intensity magnetic field can be provided, and as a kind of preferred implementation, selects neodymium iron boron.Permanent magnet 4 be shaped as disc, the bottom of metal shell 1 also can south face be close in the bottom of can north pole face being close to metal shell 1, this can affect the polarity of output signal.
Sealing shroud 6, described sealing shroud 6 is arranged on permanent magnet 4, and wraps the neighboring of described permanent magnet 4, and the neighboring of described sealing shroud 6 is provided with O-ring seal 7; As shown in Figure 1, described sealing shroud 6 is disc-shaped structure, bottom at this disc-shaped structure is formed with groove, described permanent magnet 4 is embedded in this groove, and with sealing shroud 6 be interference fit, on the lateral circle surface of this disc-shaped structure, be formed with an inwardly recessed circle groove, described O-ring seal 7 is embedded in this described circle groove, prevents that magnetic fluid 9 from flowing into gap and contacting with permanent magnet 4.The material of sealing shroud 6 should be selected the insulating material of shock resistance, high rigidity and stable chemical nature, as a kind of preferred implementation, selects polycarbonate.
Stem stem 10, the bottom face of described stem stem 10 is connected to the central part of described sealing shroud 6 upper surfaces, is pressed on directly over sealing shroud 6, in the upper surface of described stem stem 10, is inwardly recessedly vertically formed with interior electrode hole 11; As shown in Figure 1, described stem stem 10 is the axle of the ladder-type structure of two shaft parts, on the outer peripheral face of stem stem 10, is formed with for supporting the stem stem shaft shoulder 14 of gland 12 described below.The material of stem stem 10 is identical with the material of metal shell 1, and the interior electrode hole 11 on stem stem 10, for taking out the electric potential signal of fluid passage 8 inwalls.
Gland 12, described gland 12 is axially formed with through hole, and the periphery of the stem stem 10 described in being enclosed within by this through hole, between the bottom face of described gland 12 and the upper surface of described sealing shroud 6, be formed with fluid passage 8, in described fluid passage 8, be provided with magnetic fluid 9; As shown in Figure 1, Figure 3, described gland 12 includes chassis 121 sleeve column 122 that be formed on chassis 121 centers vertical with one, along described chassis 121 and sleeve column 122 be axially formed with up/down perforation for being inserted in the through hole 123 of stem stem 10, the inside circumference of 121 bottoms, described chassis is pressed on the stem stem shaft shoulder 14 that is formed on stem stem 10 outer peripheral faces, and the neighboring of 121 bottoms, described chassis is pressed in hole under the metal shell on the inner peripheral surface that is formed on metal shell 1 and takes on 13.Gland 12 is that its material is identical with sealing shroud 6 for intercepting stem stem 10 and union (screwed)bonnet (UB 15, preventing the inside and outside wall short circuit of fluid passage 8.At gland 12, smear epoxide-resin glue with the contact position (hole shoulder 13 under the metal shell of the stem stem shaft shoulder 14, metal shell 1) of stem stem 10 and metal shell 1 and prevent that magnetic fluid 9 is excessive.
Fluid passage 8 is a circular passage, and its central axis overlaps with the sensitive axes 5 of magnetic fluid gyro 100.The outer wall of fluid passage 8 is metal shell 1, and lower wall is sealing shroud 6, and inwall is stem stem 10, and upper wall is gland 12.8 inside, fluid passage are full of the magnetic fluid 9 of little viscosity, high resistivity, and as a kind of preferred implementation, magnetic fluid 9 is selected mercury.
Union (screwed)bonnet (UB 15, is embedded in the formed space of inside circumference of described gland 12 and described metal shell 1, and is threaded with the inside circumference of described metal shell 1, symmetrically on described union (screwed)bonnet (UB 15 is provided with two external electrode holes 16.As shown in Figure 1, described union (screwed)bonnet (UB 15 is disc-shaped structure, at central part, be formed with for being inserted in the through hole of gland 12, in outside circumference, be formed with the external thread being threaded with the inside circumference of described metal shell 1, on the upper surface of described disc-shaped structure, two chuck holes 18 of assembling are convenient in symmetrical being formed with.Union (screwed)bonnet (UB 15 is pressed on hole on gland 12 and metal shell and takes on 17, and has coordinated the sealing of whole device with the internal thread 2 of metal shell 1.Union (screwed)bonnet (UB 15 is identical with the material of metal shell 1, the current potential that both are identical because threaded engagement has.External electrode hole 16 on union (screwed)bonnet (UB 15, for taking out the electric potential signal of fluid passage 8 outer walls.
The axis of described metal shell 1, stud bolt hole 3, permanent magnet 4, sealing shroud 6, stem stem 10, gland 12 and union (screwed)bonnet (UB 15 and the sensitive axes 5 of this magnetic fluid gyro are on same axis.
The principle of work of a kind of magnetic fluid gyro of the present utility model is as follows:
Magnetic fluid gyro principle of work is based on MHD effect (MHD), the i.e. coupling effect in conductive fluid velocity field and magnetic field.As shown in Figure 4, when the external world is when sensitive axes 5 directions of magnetic fluid gyro 100 have angular velocity omega input, permanent magnet 4 and 8 relative inertness spaces, fluid passage produce angular displacement, and little viscosity magnetic fluid 9 inertia are large, therefore almost static with respect to inertial space, between the magnetic field that magnetic fluid 9 and permanent magnet 4 produce like this, produce a relative velocity v q, magnetic fluid 9 cutting magnetic induction lines 19 produce the motional electromotive force E linear with ω between metal shell 1 and stem stem 10, by detecting E, just can obtain current input angular velocity ω.
In the ideal situation, magnetic fluid gyro prime sensor transfer function is
E ( s ) ω ( s ) = BWrs s + υ ( 1 + H 2 ) / h 2
Wherein: B is external magnetic field magnetic induction density (T); W is fluid passage effective width, i.e. W=r o-r i(m); R is radius root mean square,
Figure BDA0000382070710000051
υ is magnetic fluid kinematic viscosity (m 2/ s); H is fluid channel height (m); H is Hartmann constant, (dimensionless); ρ is magnetic fluid density (kg/m 3); η is magnetic fluid resistivity (Ω m).
Magnetic fluid gyro amplitude-frequency and phase frequency curve are as shown in Figure 5, the similar Hi-pass filter of magnetic fluid gyro prime sensor transfer function, there is no in theory the bandwidth upper limit, therefore the bandwidth upper limit of whole magnetic fluid gyro is only determined by the low-pass filtering link of signal processing circuit, and this also depends on the squelch degree of whole signal processing circuit.In order to obtain the high as far as possible bandwidth upper limit, the amplification of magnetic fluid gyroscope signal process circuit prime should adopt discrete component to build, and adopts integrated transporting discharging to complete the second level and amplifies, and low-pass filtering is limited in circuit noise in the acceptable scope of relatively required resolution.

Claims (8)

1. a magnetic fluid gyro, includes metal shell (1), it is characterized in that, the outer bottom of described metal shell (1) is formed with inwardly recessed stud bolt hole (3), and the inside of described metal shell (1) is provided with:
Permanent magnet (4), the bottom of described permanent magnet (4) is connected on the inner bottom surface of metal shell (1);
Sealing shroud (6), it is upper that described sealing shroud (6) is arranged on permanent magnet (4), and wrap the neighboring of described permanent magnet (4), and the neighboring of described sealing shroud (6) is provided with O-ring seal (7);
Stem stem (10), the bottom face of described stem stem (10) is connected to the central part of described sealing shroud (6) upper surface, the upper surface in described stem stem (10), the vertically inside recessed interior electrode hole (11) that is formed with;
Gland (12), described gland (12) is axially formed with through hole, and the periphery of the stem stem (10) described in being enclosed within by this through hole, between the bottom face of described gland (12) and the upper surface of described sealing shroud (6), be formed with fluid passage (8), in described fluid passage (8), be provided with magnetic fluid (9);
Union (screwed)bonnet (UB (15), in the formed space of inside circumference of the gland (12) described in being embedded in and described metal shell (1), and be threaded with the inside circumference of described metal shell (1), upper symmetrical two the external electrode holes (16) that are provided with of described union (screwed)bonnet (UB (15).
2. a kind of magnetic fluid gyro according to claim 1, it is characterized in that, the axis of described metal shell (1), stud bolt hole (3), permanent magnet (4), sealing shroud (6), stem stem (10), gland (12) and union (screwed)bonnet (UB (15) and the sensitive axes (5) of this magnetic fluid gyro are on same axis.
3. a kind of magnetic fluid gyro according to claim 1, it is characterized in that, on the inner peripheral surface of described metal shell (1) with described gland (12) and described union (screwed)bonnet (UB (15) corresponding section, be formed with respectively hole under metal shell and take on hole shoulder (17) on (13) and metal shell, the neighboring of described gland (12) bottom is pressed in hole under described metal shell and takes on (13) above, and the neighboring of described union (screwed)bonnet (UB (15) is pressed in hole on described metal shell and takes on (17).
4. a kind of magnetic fluid gyro according to claim 1, it is characterized in that, described sealing shroud (6) is disc-shaped structure, bottom at this disc-shaped structure is formed with groove, described permanent magnet (4) is embedded in this groove, and with sealing shroud (6) be interference fit, on the lateral circle surface of this disc-shaped structure, be formed with an inwardly recessed circle groove, described O-ring seal (7) is embedded in this described circle groove.
5. a kind of magnetic fluid gyro according to claim 1, is characterized in that, described stem stem (10) is the axle of the ladder-type structure of two shaft parts, on the outer peripheral face of stem stem (10), is formed with for supporting the stem stem shaft shoulder (14) of gland (12).
6. a kind of magnetic fluid gyro according to claim 1, it is characterized in that, described gland (12) includes chassis (121) sleeve column (122) that be formed on chassis (121) center vertical with one, along described chassis (121) and sleeve column (122) be axially formed with up/down perforation for being inserted in the through hole (123) of stem stem (10), the inside circumference of bottom, described chassis (121) is pressed on the stem stem shaft shoulder (14) that is formed on stem stem (10) outer peripheral face, the neighboring of bottom, described chassis (121) is pressed in hole under the metal shell on the inner peripheral surface that is formed on metal shell (1) and takes on (13).
7. a kind of magnetic fluid gyro according to claim 6, is characterized in that, described chassis (121) respectively with the stem stem shaft shoulder (14) and metal shell under the contact position of hole shoulder (13) be provided with the epoxide-resin glue for preventing that magnetic fluid (9) is excessive.
8. a kind of magnetic fluid gyro according to claim 1, it is characterized in that, described union (screwed)bonnet (UB (15) is disc-shaped structure, at central part, be formed with for being inserted in the through hole of gland (12), in outside circumference, be formed with the external thread being connected with the internal thread (2) of described metal shell (1), on the upper surface of described disc-shaped structure, two chuck holes (18) of assembling are convenient in symmetrical being formed with.
CN201320573181.8U 2013-09-13 2013-09-13 Magnetic fluid gyroscope Withdrawn - After Issue CN203432587U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320573181.8U CN203432587U (en) 2013-09-13 2013-09-13 Magnetic fluid gyroscope

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320573181.8U CN203432587U (en) 2013-09-13 2013-09-13 Magnetic fluid gyroscope

Publications (1)

Publication Number Publication Date
CN203432587U true CN203432587U (en) 2014-02-12

Family

ID=50061620

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320573181.8U Withdrawn - After Issue CN203432587U (en) 2013-09-13 2013-09-13 Magnetic fluid gyroscope

Country Status (1)

Country Link
CN (1) CN203432587U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103453896A (en) * 2013-09-13 2013-12-18 天津大学 Magnetic-fluid gyroscope
CN109696181A (en) * 2018-12-25 2019-04-30 上海航天控制技术研究所 The equivalent detection circuit of MHD angular oscillation sensor and its modification method of frequency bandwidth characteristics

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103453896A (en) * 2013-09-13 2013-12-18 天津大学 Magnetic-fluid gyroscope
CN103453896B (en) * 2013-09-13 2015-12-23 天津大学 A kind of Magnetic-fluid gyroscope
CN109696181A (en) * 2018-12-25 2019-04-30 上海航天控制技术研究所 The equivalent detection circuit of MHD angular oscillation sensor and its modification method of frequency bandwidth characteristics

Similar Documents

Publication Publication Date Title
CN103453896B (en) A kind of Magnetic-fluid gyroscope
CN104931032B (en) A kind of mass MEMS resonant formula gyroscope of single anchor point four
CN104165623A (en) Internal-external double-electrode type miniature hemispherical resonance gyroscope and preparation method thereof
WO1996010185A1 (en) Compensation accelerometer
US20180292470A1 (en) Miniature magnetic field detector
CN203432587U (en) Magnetic fluid gyroscope
CN107860379B (en) Cylindrical shell Coriolis vibration gyro for electrostatic excitation and detection
CN114910059B (en) Miniaturized MEMS gyroscope north seeker
CN107655466B (en) W-shaped micro electronmechanical hemisphere gyroscope of the bipolar electrode structure with skirt
CN102998481A (en) Novel electromagnetic accelerometer structure
CN103760616B (en) Magnetic fluid compound gravity gradiometer
CN102901487B (en) Reluctance type inclination angle sensor
CN103591945A (en) Magnetic fluid top suitable for measuring 0-1 KHz of input signals
CN203605947U (en) Magnetic fluid gyroscope applicable to 0-1KHz input signal measurement
CN101493327B (en) Electromagnetic drive electrostatic pretension silicon micromechanical gyroscope
CN102650649B (en) Accelerometer
CN203673083U (en) Gravity gradient instrument of magnetofluid compound
CN105277740B (en) A kind of metallic flex accelerometer
CN101216500B (en) Circular and multi-ring shaped axial and radial magnetizing permanent magnetism antimagnetic sensitive mass micro-accelerometer
CN107957231B (en) Geological magnetic transmission displacement detector and detection method
CN203672379U (en) Three-shaft magnetic fluid gyroscope
CN106610281A (en) Magnetohydrodynamic gyroscope
CN101216309B (en) Circular and multi-ring shaped axial magnetizing permanent magnetism antimagnetic rotor electrostatic rotating micro gyroscope
CN103727935A (en) Triaxial magnetofluid gyroscope
CN113865573B (en) Gyro structure based on piezoelectric/capacitive drive detection

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20140212

Effective date of abandoning: 20151223

C25 Abandonment of patent right or utility model to avoid double patenting