CN106763445A - A kind of mutative damp variable rigidity control method of intellectual material shock absorber - Google Patents
A kind of mutative damp variable rigidity control method of intellectual material shock absorber Download PDFInfo
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- CN106763445A CN106763445A CN201710010137.9A CN201710010137A CN106763445A CN 106763445 A CN106763445 A CN 106763445A CN 201710010137 A CN201710010137 A CN 201710010137A CN 106763445 A CN106763445 A CN 106763445A
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- shock absorber
- cylinder barrel
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- piston
- block
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- 239000006096 absorbing agent Substances 0.000 title claims abstract description 43
- 230000035939 shock Effects 0.000 title claims abstract description 41
- 239000000463 material Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000004804 winding Methods 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 230000001133 acceleration Effects 0.000 claims abstract description 4
- 238000000518 rheometry Methods 0.000 claims description 19
- 238000013016 damping Methods 0.000 claims description 16
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 7
- 230000006698 induction Effects 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000006194 liquid suspension Substances 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 230000010358 mechanical oscillation Effects 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The present invention relates to a kind of mutative damp variable rigidity control method of intellectual material shock absorber, it is controlled for a kind of intellectual material shock absorber, this kind of shock absorber includes cylinder barrel 2 and power transmission spring 12 disposed within, variation rigidity mechanism is placed with cylinder barrel 2, tension spring 12 is placed in the top of variation rigidity mechanism, the side of variation rigidity mechanism body is provided with lower coil winding 3, the bottom of cylinder barrel 2 is used as shock absorber fixing end；The upper end of tension spring 12 is connected with piston 16, piston 16 is used as shock absorber movable end, the block being made up of giant magnetostrictive material 7 is provided with the top of tension spring 12, the profile of block matches with the bottom of piston 16, the side of block is provided with coil winding 8, the periphery of coil winding is in contact with cylinder barrel 2；Vibration signal size is detected according to acceleration transducer, by controlling the size of coil winding 8 and the electrical current of lower coil winding 3, the control of resistance of shock absorber and rigidity is carried out respectively.
Description
Technical field
The present invention relates to intellectual material shock absorber field, more particularly to a kind of variation rigidity mutative damp shock absorber.
Background technology
Mechanical oscillation are prevalent in each dynamic power machine and engineering goods, and vibration can cause component of machine to damage, shadow
The working effect of precision instrument is rung, or even harmful effect is produced to human body.In Aeronautics and Astronautics, machinery, automobile, building, accurate instrument
In the fields such as device, eliminate the harmful effect of vibration by shock absorber, the type of current shock absorber by control mode can be divided into by
Dynamic control type, active control type and semi- active control type.
Passive type shock absorber is made up of spring and damper, and its performance parameter rigidity and damped coefficient are once it is determined that cannot change
Become, damping property is in a certain carrying quality and best results under a certain driving frequency, simple structure, low cost of manufacture, reliability
It is high；Active vibration damping device is the additional controllable forcer on the basis of passive type shock absorber, by controlling forcer
Amount of force realizes vibration damping control, and its active damping works well, but needs the extraneous energy source device for providing controling power, manufacture
High cost, energy consumption is big, and reliability is low；The characteristics of semi- active control shock absorber is that rigidity or damped coefficient are adjustable, and its is damping
Passive type shock absorber can be better than, energy consumption is less than active control shock absorber, and combination property is higher.
In recent years, magnetorheological Intelligent Materials are rapid, and widely used at present is magnetic flow liquid and magnetorheological bullet
Elastomer material.The rigidity and damped coefficient of the novel intelligent material can rapidly change under magnetic fields, using magnetorheological
The magneto-rheological characteristic of material have developed many new controllable dampers.Chinese patent CN104595412B provides a kind of based on stream
The double-barrel structure MR fluid shock absorber of dynamic model formula, leaves gap between shock absorber outer cylinder and inner cylinder tube, piston is in inner cylinder tube
Middle motion, promotes magnetic flow liquid to be flowed in the gap location of inner cylinder tube and inside and outside cylinder barrel, and magnetic field adjusting device is fixed on shock absorber bottom
On seat, the viscosity of magnetic flow liquid is changed by adjusting magnetic field intensity, reach the purpose of control absorber damping force.Chinese patent
CN105508495B provides a kind of energy magnetic rheology elastic body vehicle damper, and its vibration absorber body includes cylinder barrel and sets
The piston rod in cylinder barrel is put, multiple piezo electric modules and multiple magnetic rheology elastic bodies, piezo electric module are set with the middle part of piston rod
In be inlaid with piezoelectric vibrator, by direct piezoelectric effect produce electric energy and give Vehicular accumulator cell charge, by controlling magnetorheological elasticity
The field coil circuit size of current of external side, changes its residing magnitude of field intensity to control the extruding of magnetic rheology elastic body firm
Degree, is finally reached the purpose of control damper stiffness.
Although magnetorheological fluid materials have a good magnetic rheology effect, but magnetic-particle in liquid suspension medium easily sinks
Drop, stability are poor, particle is easy to wear, hinder it and are further applied in practice in engineering.Magnetic rheology elastic body is magnetorheological
Grow up on the basis of liquid, magnetic flow liquid mother liquor is substituted by high molecular polymer, overcome the shortcoming of magnetic flow liquid, but
It is that the shock absorber based on magnetorheological elastomer material can only control stiffness variation, it is difficult to adjust the damping parameter of shock absorber.
The content of the invention
The purpose of the present invention be directed to prior art presence deficiency, improve damper structure, and for improvement after subtract
The device that shakes provides a kind of rigidity and the controllable shock absorber control method of damping parameter.Technical scheme is as follows：
A kind of mutative damp variable rigidity control method of intellectual material shock absorber, is controlled for a kind of intellectual material shock absorber
System, this kind of shock absorber includes being placed with variation rigidity mechanism, tension spring in cylinder barrel 2 and power transmission spring 12 disposed within, cylinder barrel 2
12 tops for being placed in variation rigidity mechanism, the main body of variation rigidity mechanism is overlapped mutually by silicon steel sheet 14 with magnetic rheology elastic body thin slice 15
Composition, lower coil winding 3 is provided with the side of variation rigidity mechanism body, and the bottom of cylinder barrel 2 is used as shock absorber fixing end；Pulling force
The upper end of spring 12 is connected with piston 16, and piston 16 is provided with by super magnetic as shock absorber movable end in the top of tension spring 12
The block for causing telescopic material 7 to be made, profile and the bottom of piston 16 of block match, and the side of block is provided with coil
Winding 8, the periphery of coil winding is in contact by friction plate 9 with cylinder barrel 2；
Vibration signal size is detected according to acceleration transducer, by controlling coil winding 8 and lower coil winding 3
The size of electrical current, carries out the control of resistance of shock absorber and rigidity respectively：Control passes through the size of current of coil winding 8 simultaneously
The magnetic field of different induction levels is produced, the expansion and contraction of the block being made up of giant magnetostrictive material 7 is changed, entered
And extrusion friction piece 9 is allowed to change with the interior casing wall normal pressure of cylinder barrel 2 and then change contacts Coulomb damping size；Under control passes through
The size of current of coil windings 3 simultaneously produces the magnetic field of different induction levels, makes the extruding of magnetic rheology elastic body thin slice 15
Rigidity is changed, and multilayer magnetic rheology elastic body thin slice 15 is overlapped mutually with silicon steel sheet 14 and power transmission spring 12 of connecting is adjusted jointly
Damper stiffness changes.
Wherein, it is isolated by protecting sleeve 4 between variation rigidity mechanism and lower coil winding 3, protection sleeve 4 is by magnetic conductivity
Material is made.The block being made up of giant magnetostrictive material 7 is annular shape, and block body 17 is carried on piston 16, and block is positioned at drawing
It is engaged between power spring 12 and block body 17 and with the bottom of piston 16 and block body 17.Cunning is provided with the upper end open of cylinder barrel 2
Dynamic bearing 6；Piston 16 is connected by sliding bearing 6 with cylinder barrel 2, and the upper end of piston 16 is fixed with upper lift ring 5.In the bottom of cylinder barrel 2
Periphery offers screw thread, and the bottom of cylinder barrel 2 is connected by screw thread with lower lift ring 1.It is solid respectively in the top and bottom of power transmission spring 12
Surely upper split chuck 11 and lower spring chuck 13 fix, the bottom of piston 16 is fixedly connected with upper split chuck 11.
The present invention controls stiffness variation by the method that multilayer magnetic rheology elastic body is overlapped mutually, while being stretched using super mangneto
Compression material, controls damper piston with the size of inner wall of cylinder contact to change shock absorber coulomb by magnetostrictive effect
Damping force size, so as to realize the control of rigidity and damping parameter.
Brief description of the drawings
Fig. 1 is control object of the invention：The structural representation of intellectual material shock absorber, Fig. 2 is A-A to structure section view
Figure, in figure：
1-lower lift ring；2-cylinder barrel；3-lower coil winding；4-protection sleeve；5-upper lift ring；6-sliding bearing；7—
Giant magnetostrictive material；8-coil winding；9-friction plate；10-trip bolt；11-upper split chuck；12-power transmission bullet
Spring；13-lower spring chuck；14-biadhesive silicon steel sheet；15-magnetic rheology elastic body thin slice；16-piston；17-block body.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail, and following examples can make this specialty
Technical staff is more completely understood the present invention, but do not limit the invention in any way.
The present invention controls stiffness variation by the method that multilayer magnetic rheology elastic body is overlapped mutually, and introduces new super mangneto and stretches
Compression material, controls damper piston with the size of inner wall of cylinder contact to change shock absorber coulomb by magnetostrictive effect
Damping size, finally realizes rigidity and the controllable purpose of damping parameter.
As depicted in figs. 1 and 2, control object of the invention：The structure of intellectual material shock absorber is：Lower lift ring 1 and cylinder barrel 2
Bottom is connected through a screw thread, and cylinder barrel 2, lower lift ring 1 and upper lift ring 5 are made by magnetoresistance material high, and the bottom of cylinder barrel 2 is provided with groove,
For winding lower coil winding 3, variation rigidity mechanism is overlapped mutually by biadhesive silicon steel sheet 14 with magnetic rheology elastic body thin slice 15
Composition；Isolated by protecting sleeve 4 between lower coil winding 3 and variation rigidity mechanism, lower coil winding 2 can be protected to prevent by magnetic current
Change elastomer is extruded about 15 and causes abrasion, and protection sleeve 4 is made up of magnetic conductive material, also can be used as the iron inside magnet exciting coil
Core plays increase magnetic induction intensity effect；Mutative damp mechanism is by 9 groups of giant magnetostrictive material 7, coil winding 8 and friction plate
Into power transmission spring 12 is fixed by upper and lower split chuck 11,13, and the bottom piston portion of upper lift ring 5 is logical with upper split chuck 11
Cross trip bolt 10 to connect, giant magnetostrictive material 7 is engaged for annular shape and with the piston 16 of the bottom of upper lift ring 5.
By controlling the size of coil winding 8 and the electrical current of lower coil winding 3, carry out respectively resistance of shock absorber and
The control of rigidity：Control passes through the size of current of coil winding 8 and produces the magnetic field of different induction levels, makes super magnetic
Cause the expansion and contraction of telescopic material 7 to change, so extrusion friction piece 9 be allowed to change with the interior casing wall normal pressure of cylinder barrel 2 and then
Change contact Coulomb damping size；Control passes through the size of current of lower coil winding 3 and produces different induction levels
Magnetic field, makes the extruding rigidity of magnetic rheology elastic body thin slice 15 change, and multilayer magnetic rheology elastic body 15 is mutual with silicon steel sheet 14
The power transmission spring 12 that is superimposed and connects regulation damper stiffness change jointly.
Control method of the invention is as follows：Vibration signal size is detected using acceleration transducer, is transported by processor
Output control electric current is analysed in point counting, and the electrical current size of upper and lower coil windings is controlled respectively, and coil winding inside produces sensing
Magnetic field, because giant magnetostrictive material has magnetostrictive effect, its normal pressure size will change, extrusion friction piece and then
Change the Coulomb damping size of shock absorber；The induced field that lower coil winding is produced will control magnetic rheology elastic body thin slice rigidity to become
Change, the superposition of multilayer magnetic rheology elastic body thin slice simultaneously changes damper stiffness size with the collective effect of serial spring.
The present invention is not limited to embodiments described above.Description to specific embodiment above is intended to describe and says
Bright technical scheme, above-mentioned specific embodiment is only schematical, is not restricted.This is not being departed from
In the case of invention objective and scope of the claimed protection, one of ordinary skill in the art may be used also under enlightenment of the invention
The specific conversion of many forms is made, these are belonged within protection scope of the present invention.
Claims (6)
1. a kind of mutative damp variable rigidity control method of intellectual material shock absorber, is controlled for a kind of intellectual material shock absorber
System, this kind of shock absorber includes being placed with variation rigidity mechanism in cylinder barrel (2) and power transmission spring (12) disposed within, cylinder barrel (2), draws
Power spring (12) is placed in the top of variation rigidity mechanism, and the main body of variation rigidity mechanism is by silicon steel sheet (14) and magnetic rheology elastic body thin slice
(15) composition is overlapped mutually, the side of variation rigidity mechanism body is provided with lower coil winding (3), the bottom conduct of cylinder barrel (2)
Shock absorber fixing end；The upper end of tension spring (12) is connected with piston (16), piston (16) as shock absorber movable end, in pulling force
Spring (12) top is provided with the block being made up of giant magnetostrictive material (7), the profile of block and the bottom phase of piston (16)
Matching, coil winding (8) is provided with the side of block, and the periphery of coil winding passes through friction plate (9) and cylinder barrel (2) phase
Contact；
Vibration signal size is detected according to acceleration transducer, by controlling coil winding (8) and lower coil winding (3)
The size of electrical current, carries out the control of resistance of shock absorber and rigidity respectively：The size of current that control passes through coil winding (8)
And the magnetic field of different induction levels is produced, become the expansion and contraction of the block being made up of giant magnetostrictive material (7)
Change, and then extrusion friction piece (9) is allowed to change with the interior casing wall normal pressure of cylinder barrel (2) and then change contacts Coulomb damping size；
Control passes through the size of current of lower coil winding (3) and produces the magnetic field of different induction levels, makes magnetic rheology elastic body
The extruding rigidity of thin slice (15) changes, and multilayer magnetic rheology elastic body thin slice (15) is overlapped mutually and connects with silicon steel sheet (14)
Power transmission spring (12) regulation damper stiffness change jointly.
2. mutative damp variable rigidity control method according to claim 1, it is characterised in that variation rigidity mechanism and lower coil around
It is isolated by protecting sleeve (4) between group (3), protection sleeve (4) is made up of magnetic conductive material.
3. mutative damp variable rigidity control method according to claim 1, it is characterised in that by giant magnetostrictive material (7)
The block being made is annular shape, carries block body (17) on piston (16), block be positioned at tension spring (12) and block body (17) it
Between and be engaged with piston (16) bottom and block body (17).
4. mutative damp variable rigidity control method according to claim 1, it is characterised in that in the upper end open of cylinder barrel (2)
Place is provided with sliding bearing (6)；Piston (16) is connected by sliding bearing (6) with cylinder barrel (2), and piston (16) upper end is fixed with
Suspension ring (5).
5. mutative damp variable rigidity control method according to claim 1, it is characterised in that in the lower, outer perimeter of cylinder barrel (2)
Screw thread is offered, cylinder barrel (2) bottom is connected by screw thread with lower lift ring (1).
6. mutative damp variable rigidity control method according to claim 1, it is characterised in that in the upper end of power transmission spring (12)
Upper split chuck (11) is respectively fixed with lower end and lower spring chuck (13) is fixed, bottom and the upper split chuck of piston (16)
(11) it is fixedly connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710010137.9A CN106763445B (en) | 2017-01-06 | 2017-01-06 | A kind of mutative damp variable rigidity control method of intellectual material shock absorber |
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| CN201710010137.9A CN106763445B (en) | 2017-01-06 | 2017-01-06 | A kind of mutative damp variable rigidity control method of intellectual material shock absorber |
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| CN106763445A true CN106763445A (en) | 2017-05-31 |
| CN106763445B CN106763445B (en) | 2017-11-03 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107387656A (en) * | 2017-08-28 | 2017-11-24 | 河北建筑工程学院 | Bridge cable damper |
| CN107939895A (en) * | 2017-11-13 | 2018-04-20 | 东北大学 | Improve the method and vibration isolator of the damping force of squash type magnetic flow liquid passive vibration isolation device |
| CN108425983A (en) * | 2018-04-08 | 2018-08-21 | 天津大学 | Multi-point Ground Motion suitable for shake table tests stiffness and damping adjustable boundary system |
| CN108678685A (en) * | 2018-07-23 | 2018-10-19 | 中国海洋石油集团有限公司 | A kind of marine riser vortex-induced vibration Adaptive Suppression device and method |
| CN109185234A (en) * | 2018-09-30 | 2019-01-11 | 珠海格力电器股份有限公司 | Vibration reduction assembly, fan assembly, air conditioner and control method of air conditioner |
| CN111230847A (en) * | 2020-03-09 | 2020-06-05 | 西南交通大学 | Upper limb industrial exoskeleton capable of actively reducing vibration impact |
| CN111336207A (en) * | 2020-03-12 | 2020-06-26 | 重庆工程职业技术学院 | Damping adjustable shock absorber for automobile |
| CN111795110A (en) * | 2020-07-06 | 2020-10-20 | 石家庄铁道大学 | Vibration damping support for track |
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| CN101225864A (en) * | 2007-05-22 | 2008-07-23 | 浙江大学 | Magneto-rheologic damping control method |
| CN201100361Y (en) * | 2007-09-30 | 2008-08-13 | 北京航空航天大学 | Magnetism driven flexing actor |
| US20090133976A1 (en) * | 2007-11-28 | 2009-05-28 | Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. | Magnetorheological Force Transmission Device |
| CN101915283A (en) * | 2010-08-06 | 2010-12-15 | 浙江大学 | Magneto-rheological combined damping control method and device |
| CN103603914A (en) * | 2013-11-25 | 2014-02-26 | 吉林大学 | Magnetostriction damper |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101225864A (en) * | 2007-05-22 | 2008-07-23 | 浙江大学 | Magneto-rheologic damping control method |
| CN201100361Y (en) * | 2007-09-30 | 2008-08-13 | 北京航空航天大学 | Magnetism driven flexing actor |
| US20090133976A1 (en) * | 2007-11-28 | 2009-05-28 | Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. | Magnetorheological Force Transmission Device |
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| CN103603914A (en) * | 2013-11-25 | 2014-02-26 | 吉林大学 | Magnetostriction damper |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107387656B (en) * | 2017-08-28 | 2023-08-22 | 河北建筑工程学院 | Bridge inhaul cable damper |
| CN107387656A (en) * | 2017-08-28 | 2017-11-24 | 河北建筑工程学院 | Bridge cable damper |
| CN107939895A (en) * | 2017-11-13 | 2018-04-20 | 东北大学 | Improve the method and vibration isolator of the damping force of squash type magnetic flow liquid passive vibration isolation device |
| CN107939895B (en) * | 2017-11-13 | 2019-07-19 | 东北大学 | Improve the method and vibration isolator of the damping force of squash type magnetorheological fluid passive vibration isolation device |
| CN108425983A (en) * | 2018-04-08 | 2018-08-21 | 天津大学 | Multi-point Ground Motion suitable for shake table tests stiffness and damping adjustable boundary system |
| CN108425983B (en) * | 2018-04-08 | 2024-03-29 | 天津大学 | Rigidity damping adjustable boundary system suitable for multipoint earthquake motion test of vibrating table |
| CN108678685A (en) * | 2018-07-23 | 2018-10-19 | 中国海洋石油集团有限公司 | A kind of marine riser vortex-induced vibration Adaptive Suppression device and method |
| CN108678685B (en) * | 2018-07-23 | 2023-10-20 | 中国海洋石油集团有限公司 | Self-adaptive suppression device and method for vortex-induced vibration of marine riser |
| CN109185234A (en) * | 2018-09-30 | 2019-01-11 | 珠海格力电器股份有限公司 | Vibration reduction assembly, fan assembly, air conditioner and control method of air conditioner |
| CN109185234B (en) * | 2018-09-30 | 2024-03-19 | 珠海格力电器股份有限公司 | Vibration reduction assembly, fan assembly, air conditioner and control method of air conditioner |
| CN111230847A (en) * | 2020-03-09 | 2020-06-05 | 西南交通大学 | Upper limb industrial exoskeleton capable of actively reducing vibration impact |
| CN111230847B (en) * | 2020-03-09 | 2023-08-04 | 西南交通大学 | Upper limb industrial exoskeleton capable of actively reducing vibration impact |
| CN111336207B (en) * | 2020-03-12 | 2022-08-05 | 重庆工程职业技术学院 | Damping adjustable shock absorber for automobile |
| CN111336207A (en) * | 2020-03-12 | 2020-06-26 | 重庆工程职业技术学院 | Damping adjustable shock absorber for automobile |
| CN111795110A (en) * | 2020-07-06 | 2020-10-20 | 石家庄铁道大学 | Vibration damping support for track |
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| CN106763445B (en) | 2017-11-03 |
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Address after: 300350 District, Jinnan District, Tianjin Haihe Education Park, 135 beautiful road, Beiyang campus of Tianjin University Patentee after: Tianjin University Address before: 300072 Tianjin City, Nankai District Wei Jin Road No. 92 Patentee before: Tianjin University |
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| 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: 20171103 |