CN206862534U - The quiet torque sensor of Non-contact Magnetic detection fiber grating - Google Patents
The quiet torque sensor of Non-contact Magnetic detection fiber grating Download PDFInfo
- Publication number
- CN206862534U CN206862534U CN201720392599.7U CN201720392599U CN206862534U CN 206862534 U CN206862534 U CN 206862534U CN 201720392599 U CN201720392599 U CN 201720392599U CN 206862534 U CN206862534 U CN 206862534U
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- Prior art keywords
- quiet
- magnet ring
- double wedge
- fiber grating
- magnetic
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Abstract
The utility model discloses a kind of quiet torque sensor of Non-contact Magnetic detection fiber grating, it include central shaft (1), it is quiet draw magnet ring (2), permanent magnet (3), dynamic magnetism-isolating loop (4) and fiber grating Magnetic testi part, the dynamic magnetism-isolating loop (4) is realized and is fastenedly connected with central shaft (1) by being interference fitted；Magnetic testi part, which is pasted on, quiet draws magnet ring (2)；The quiet magnet ring (2) that draws realizes reliable assembling by ring flange (8) and frame (11), and one end of central shaft (1) and frame (11) are fixed；The permanent magnet (3) in magnetic field is excited to be placed in quiet draw on magnet ring (2).The utility model is due to introducing magnetic field and Fiber Bragg Grating technology, it is possible to achieve quiet torque signal is non-contact, high reliability detects in real time.
Description
Technical field
Moment of torsion non-contact type on-line measurement is the utility model is related to, belongs to quiet torque measurement techniques field.
Background technology
Every field of the torque measurement in production and living is widely used, it has also become various Design of Mechanical Product
Essential content in research.Such as screw-driving moment inspecting in high precision instrument assembling process, torque spanner manufacture with
Test, speed changer static load torque rating etc..
In novel sensor, the maximum feature of fiber grating is to use Wavelength-encoding, and not by optical power fluctuation and light
Curved way causes the influence of loss, the performance with good anti-interference and quasi-distributed sensing, but current optical fiber light
In grid torque sensor, unstable and difficult maintenance issues, 45 ° of stickup angle are pasted in the fiber grating presence for being pasted on axle surface
It is difficult to ensure that, poor reliability.
In magnetic field the presence of magnetic circuit be it is a kind of build non-contact measurement ideal medium, the magnetic field excited using permanent magnet
The unique advantage without providing the excitation energy can also be realized, magnetic theory and Fiber Bragg Grating technology are combined and can be applied to moment of torsion
Measurement.
In a kind of " torque optical fiber sensor " patent of invention of Patent No. 200710179471.3, utilize permanent magnets to pass
Torque delivery, but fiber grating and axle are directly stickup, paste angle and measurement result is had a great influence, poor reliability；Patent No.
In 201310578568.7 " non-contact torque sensor magnetic structure " patent of invention, comprising everywhere in constructed magnetic circuit
Air gap, poor anti jamming capability, and permanent magnet be mounted on an axle cause assembling and it is difficult in maintenance.
The content of the invention
Technical problem to be solved in the utility model is：A kind of quiet moment of torsion of Non-contact Magnetic detection fiber grating is provided to pass
Sensor, it uses permanent magnet excitation field, and the energy is encouraged without providing；Turned round by introducing the theoretical fiber grating that solves of magnetic in measurement
Stickup during square is unstable and difficult maintenance issues, realizes that quiet torque signal is non-contact, high reliability detects in real time.
The utility model solves the technical scheme that its technical problem uses：Including central shaft, it is quiet draw magnet ring, permanent magnet,
Dynamic magnetism-isolating loop and fiber grating Magnetic testi part, the dynamic magnetism-isolating loop realize that the fastening with central shaft connects by being interference fitted
Connect；Magnetic testi part, which is pasted on, quiet draws magnet ring；The quiet magnet ring that draws realizes reliable assembling by ring flange and frame, and central shaft
One end is fixed with frame；The permanent magnet in magnetic field is excited to be placed in quiet draw on magnet ring.
It is described it is quiet draw magnet ring, dynamic magnetism-isolating loop is provided with quantity identical double wedge structure, double wedge is interspersed, middle to be provided with gas
Gap, form contactless form；Quiet magnet ring tooth root position of drawing sets permanent magnet excitation field, and double wedge skew back face position sets optical fiber
Grating Magnetic testi part.
Described dynamic magnetism-isolating loop double wedge, it is quiet draw magnet ring double wedge, its double wedge top sets wedgewise, and double wedge skew back face is air gap
The main of middle magnetic induction line pass through face, and magnetic induction intensity predominantly detects face.
The fixed magnetism-isolating loop that moves on center shaft twists in the range of certain angle (- 5 °~5 °)；Central shaft is sensing
Device axle, pass through positive coupling and transmission axis connection to be measured, or power transmission shaft to be measured.
Described quiet magnet ring, dynamic magnetism-isolating loop double wedge, the quiet magnet ring double wedge that draws of drawing is made up of permeability magnetic material electrical pure iron, described
Dynamic magnetism-isolating loop is made up of non-magnet material aluminium alloy.
Described permanent magnet, the face that its face moves magnetism-isolating loop are processed as fan-like pattern, and two, adjacent permanent magnet interval is quiet to draw magnetic
Ring convex tooth.
Described fiber grating Magnetic testi part is made up of supermagnetic device and Fiber Bragg Grating FBG, two magnetic inspections
Part is surveyed to be pasted on respectively on quiet two skew back faces for drawing magnet ring double wedge of permanent magnet.
Described supermagnetic device is the rare earth material by changes of magnetic field can be followed to produce larger magnetostrictive strain
It is made, the material model is Terfenol-D；Described fiber grating is ordinary optic fibre Bragg grating, in ultra-magnetic telescopic member
Fiber grating is pasted on part.
The utility model has the advantages of following main compared with prior art：
(1) utilizing permanent magnet excitation field and build non-contact form, the energy is encouraged without providing, magnetic circuit is simply efficient,
Using paired Magnetic testi part, the differential detection of torque signal can be realized with reference to air gap increase and corresponding reduction, simultaneously
Complete temperature-compensating.
(2) all permanent magnet and Magnetic testi parts be all placed in it is quiet draw on magnet ring, move the only simple interference of magnetism-isolating loop and axle and fill
Match somebody with somebody, the organization plan is easy to assemble and debugging maintenance work afterwards.
(3) move magnetism-isolating loop to be interspersed with quiet magnet ring double wedge structure of drawing, centre is provided with air gap, and measurable both forward and reverse directions are turned round
Square, alternative quiet magnet ring double wedge quantity of drawing is more when arranging permanent magnet and Magnetic testi part, can arrange that measuring point is more.
(4) in the taping process of fiber grating, what it is due to measurement is magnetostrictive strain in plane, different from directly viscous
It is attached on the face of cylinder of axle, reduces stickup difficulty.
Brief description of the drawings
Fig. 1 is the utility model sensor instance schematic diagram.
Fig. 2 is that sensor is mounted on an axle schematic diagram, and it is Fig. 1 A-A sectional views.
Fig. 3 is Light Condition lower sensor magnetic structure schematic diagram.
Fig. 4 is subject to sensor magnetic structure schematic diagram after moment of torsion.
Fig. 5 is Magnetic testi part bonding method and structural representation.
Fig. 6 is permanent magnet arrangement and structural representation.
In figure：1. central shaft, 2. it is quiet draw magnet ring, 3. permanent magnets, 4. dynamic magnetism-isolating loops, 5. magnetic induction intensity detection faces are (quiet to draw
Magnet ring double wedge skew back face), 6. dynamic magnetism-isolating loop double wedges, 7. quiet draw magnet ring double wedge, 8. ring flanges, 9. supermagnetic devices, 10. light
Fine grating, 11. frames.
Embodiment
With reference to citing structure and accompanying drawing, the utility model is described in further detail.
The quiet torque sensor of Non-contact Magnetic detection fiber grating provided by the utility model, as shown in Figure 1, 2, including：
Central shaft 1, it is quiet draw magnet ring 2, dynamic magnetism-isolating loop 4 and Magnetic testi part, wherein：Dynamic magnetism-isolating loop 4 is realized with by being interference fitted
Mandrel 1 is fastenedly connected；Magnetic testi part, which is pasted on, quiet draws magnet ring 2；The quiet magnet ring 2 that draws can by ring flange 8 and the realization of frame 11
By assembling, and one end of central shaft 1 is fixed with frame 11.
The described quiet magnet ring 2 that draws keeps geo-stationary with frame 11, and described dynamic magnetism-isolating loop 4 twists with central shaft 1.
It is described it is quiet draw magnet ring 2, dynamic magnetism-isolating loop 4 is provided with quantity identical double wedge structure, as shown in figures 1-4, dynamic magnetism-isolating loop
Double wedge 6, it is quiet draw the mutual dislocation of magnet ring double wedge 7, being provided with air gap in centre forms contactless form.8 are set in this example to move
Magnetism-isolating loop double wedge, 8 quiet to draw magnet ring double wedge.Double wedge top sets wedgewise, and double wedge skew back face is the main of magnetic induction line in air gap
Face is passed through, it is that more concentration and uniform magnetic field environment are constructed in air gap that it, which is acted on,.
Described air gap is magnetic induction line draws passing over for the skew back face of magnet ring double wedge 7 and the dynamic skew back face of magnetism-isolating loop double wedge 6 quiet
The air ambient undergone in journey.
Described magnetic induction intensity detection faces 5 be it is quiet draw magnet ring double wedge skew back face, be that the main of magnetic induction line passes through face, be cloth
Put the magnetic induction intensity detection faces of Magnetic testi part.
Described central shaft 1 is non-rotating shaft, and dynamic magnetism-isolating loop occurs with central shaft in the range of certain angle (- 5 °~5 °)
Reverse.Central shaft is sensor axis, by shaft coupling and transmission axis connection to be measured, or the power transmission shaft actually reversed occurs.
It is described it is quiet draw magnet ring 2, it is quiet draw magnet ring double wedge 7, flange 8 can be made into one.
Described quiet magnet ring 2, dynamic magnetism-isolating loop double wedge 6, the quiet magnet ring double wedge 7 that draws of drawing is made up of permeability magnetic material electrical pure iron, is
Preferable magnetic circuit is built, described dynamic magnetism-isolating loop 4 is non-magnet material aluminium alloy.
Described magnetic field is established by permanent magnet 3, permanent magnet 3 be placed in it is quiet draw magnet ring, the face of permanent magnet 3 moves the face of magnetism-isolating loop
Fan-like pattern can be processed as, two, the interval of adjacent permanent magnet 3 is quiet to draw magnet ring double wedge 7.
Described permanent magnet 3 uses axial charging, and the right opposite with dynamic magnetism-isolating loop double wedge 6 can be N poles, or S poles, it is different forever
Polarity of the magnet from the dynamic right opposite of magnetism-isolating loop double wedge 6 in assembling process can be different.
Described Magnetic testi part is made up of supermagnetic device 9 and fiber grating 10, using AB glue stick by they
It is pasted on close to the quiet skew back face 5 for drawing magnet ring double wedge 7 of permanent magnet 3, the surface induction intensity in detection skew back face.Measure simultaneously
Two skew back face magnetic induction intensity can realize the differential detection for reversing angle signal, output signal be subtracted each other to offset because of temperature change
Measurement error caused by factor.
Described supermagnetic device 9 is the rare earth material that changes of magnetic field can be followed to produce larger magnetostrictive strain,
For banding, material model is Terfenol-D in this example.Described fiber grating 10 is ordinary optic fibre Bragg grating, utilizes AB
Adhesive pastes fiber grating 10 (Fig. 5) on supermagnetic device 9.
Described fiber grating 10 is pasted along the sideline direction of supermagnetic device 9, sticks in supermagnetic device 9
Between position.
As shown in figure 3, by it is quiet draw magnet ring 2 and dynamic magnetism-isolating loop 4 circumferentially deploy and with dotted line with the arrow mark magnetic induction line, its
Middle dotted arrow direction represents magnetic direction.
The quiet torque sensor of Non-contact Magnetic detection fiber grating provided by the utility model, its magnetic structure are designed as：
Permanent magnet 3 be placed in it is quiet draw on magnet ring 2, with the dynamic top surface face of magnetism-isolating loop double wedge 6, it is assumed that N poles face.Magnetic induction line from N poles,
The air for passing through fixed range enters in dynamic magnetism-isolating loop double wedge 6, and magnetic induction line divides two-way to pass through dynamic magnetism-isolating loop in dynamic magnetism-isolating loop double wedge 6
Double wedge skew back face enter it is in meditation draw magnet ring double wedge skew back face 5, formed differential, finally pass through the quiet S poles drawn magnet ring 2 and return to permanent magnet 3,
Form closed magnetic circuit.
In Fig. 4, thick dashed line represents magnetic induction intensity enhancing, and fine dotted line represents that magnetic induction intensity weakens.
The quiet torque sensor of Non-contact Magnetic detection fiber grating provided by the utility model, its course of work are as follows：
Under Light Condition, central shaft 1 does not produce torsional angle, and dynamic magnetism-isolating loop double wedge is in the adjacent quiet magnet ring double wedge that draws and hits exactly meta
(Fig. 3) is put, magnetic induction line, which passes through, in dynamic magnetism-isolating loop double wedge returns to that the quiet air gap distance that draws in magnet ring double wedge in both sides is identical, and both sides are quiet to draw
The magnetic induction intensity that magnet ring double wedge skew back face detects is identical.Acted on when central shaft bears moment of torsion, and dynamic magnetism-isolating loop produces therewith
When having given birth to a torsion angle, torsional angle signal is converted to the change of magnetic induction intensity by the double wedge structure that is interspersed.Such as
In Fig. 4, dynamic magnetism-isolating loop double wedge skew back face diminishes with the quiet magnet ring double wedge skew back face air gap that draws in upside, it is corresponding with downside is quiet draws magnetic
The air gap increase of ring convex flank inclined-plane.Air gap causes the change of magnetic resistance so that upside is quiet to draw the magnetic passed through on magnet ring double wedge skew back face
Sense line number amount be more than downside, on the right side it is long-pending it is constant in the case of, the magnetic induction intensity that upside is quiet to draw magnet ring double wedge skew back face is big
In downside, that is, generate a difference.The different magnetic induction intensity in both sides causes giant magnetostrictive material that different amounts of change occurs
Shape, strain is finally detected by the fiber grating being pasted onto on giant magnetostrictive material surface, exported as wavelength signals.Pass through structure
It is optic fiber grating wavelength signal that magnetic circuit, which is built, by the torque signal output of central shaft, realizes the contactless online survey of quiet torque signal
Amount.
Claims (6)
1. a kind of quiet torque sensor of Non-contact Magnetic detection fiber grating, it is characterized in that including central shaft (1), quiet drawing magnet ring
(2), permanent magnet (3), dynamic magnetism-isolating loop (4) and fiber grating Magnetic testi part, the dynamic magnetism-isolating loop (4) are real by being interference fitted
Now it is fastenedly connected with central shaft (1)；Magnetic testi part, which is pasted on, quiet draws magnet ring (2)；The quiet magnet ring (2) that draws passes through ring flange (8)
Reliable assembling is realized with frame (11), and one end of central shaft (1) and frame (11) are fixed；Excite the permanent magnet (3) in magnetic field
It is placed in quiet draw on magnet ring (2).
2. the quiet torque sensor of Non-contact Magnetic detection fiber grating according to claim 1, it is characterised in that described
It is quiet draw magnet ring (2), dynamic magnetism-isolating loop (4) is provided with quantity identical double wedge structure, double wedge is interspersed, and centre is provided with air gap, composition
Contactless form；Quiet magnet ring (2) tooth root position of drawing sets permanent magnet excitation field, and optical fiber light is set on double wedge skew back face (5)
Grid Magnetic testi part.
3. the quiet torque sensor of Non-contact Magnetic detection fiber grating according to claim 2, it is characterised in that described
Dynamic magnetism-isolating loop double wedge (6), it is quiet draw magnet ring double wedge (7), its double wedge top sets wedgewise, and double wedge skew back face (5) is magnetic in air gap
The main of sense line passes through face.
4. the quiet torque sensor of Non-contact Magnetic detection fiber grating according to claim 1, it is characterised in that described
Central shaft (1) is non-rotating shaft, and dynamic magnetism-isolating loop (4) twists with central shaft (1) in the range of -5 °~5 ° of certain angle；In
Mandrel (1) is sensor axis, passes through positive coupling and transmission axis connection to be measured, or power transmission shaft to be measured.
5. the quiet torque sensor of Non-contact Magnetic detection fiber grating according to claim 1, it is characterised in that described
Quiet magnet ring (2), dynamic magnetism-isolating loop double wedge (6), the quiet magnet ring double wedge (7) that draws of drawing is made up of permeability magnetic material electrical pure iron, it is described it is dynamic every
Magnet ring (4) is made up of non-magnet material aluminium alloy.
6. the quiet torque sensor of Non-contact Magnetic detection fiber grating according to claim 1, it is characterised in that described
Permanent magnet (3), the face that its face moves magnetism-isolating loop (4) are processed as fan-like pattern, and adjacent permanent magnet (3) midfeather two is quiet to draw magnet ring
Double wedge (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720392599.7U CN206862534U (en) | 2017-04-14 | 2017-04-14 | The quiet torque sensor of Non-contact Magnetic detection fiber grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720392599.7U CN206862534U (en) | 2017-04-14 | 2017-04-14 | The quiet torque sensor of Non-contact Magnetic detection fiber grating |
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| Publication Number | Publication Date |
|---|---|
| CN206862534U true CN206862534U (en) | 2018-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720392599.7U Expired - Fee Related CN206862534U (en) | 2017-04-14 | 2017-04-14 | The quiet torque sensor of Non-contact Magnetic detection fiber grating |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542500A (en) * | 2019-06-26 | 2019-12-06 | 南京华敏电子有限公司 | torque sensor adopting axial magnetizing magnetic ring |
| CN111157156A (en) * | 2020-01-15 | 2020-05-15 | 中北大学 | Super-magnetostrictive and tunnel magnetoresistive composite rotating part torque testing method |
| CN111198056A (en) * | 2020-01-15 | 2020-05-26 | 中北大学 | GMM and TMR composite totally-enclosed non-contact rotating part torque testing device |
| CN114152374A (en) * | 2021-11-09 | 2022-03-08 | 天津大学 | High-precision micro torque sensor based on fiber Bragg grating |
-
2017
- 2017-04-14 CN CN201720392599.7U patent/CN206862534U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542500A (en) * | 2019-06-26 | 2019-12-06 | 南京华敏电子有限公司 | torque sensor adopting axial magnetizing magnetic ring |
| CN111157156A (en) * | 2020-01-15 | 2020-05-15 | 中北大学 | Super-magnetostrictive and tunnel magnetoresistive composite rotating part torque testing method |
| CN111198056A (en) * | 2020-01-15 | 2020-05-26 | 中北大学 | GMM and TMR composite totally-enclosed non-contact rotating part torque testing device |
| CN111157156B (en) * | 2020-01-15 | 2021-05-28 | 中北大学 | Super-magnetostrictive and tunnel magnetoresistive composite rotating part torque testing method |
| CN114152374A (en) * | 2021-11-09 | 2022-03-08 | 天津大学 | High-precision micro torque sensor based on fiber Bragg grating |
| CN114152374B (en) * | 2021-11-09 | 2022-10-04 | 天津大学 | High-precision micro torque sensor based on fiber Bragg grating |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180109 Termination date: 20210414 |