CN201802803U - Self-induction type magnetorheological shock-absorbing damping device - Google Patents
Self-induction type magnetorheological shock-absorbing damping device Download PDFInfo
- Publication number
- CN201802803U CN201802803U CN2010205476577U CN201020547657U CN201802803U CN 201802803 U CN201802803 U CN 201802803U CN 2010205476577 U CN2010205476577 U CN 2010205476577U CN 201020547657 U CN201020547657 U CN 201020547657U CN 201802803 U CN201802803 U CN 201802803U
- Authority
- CN
- China
- Prior art keywords
- self
- piston rod
- piston
- cylinder barrel
- damping device
- 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.)
- Expired - Lifetime
Links
- 238000013016 damping Methods 0.000 title claims abstract description 69
- 239000012530 fluid Substances 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 230000006698 induction Effects 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 10
- 230000035699 permeability Effects 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000000696 magnetic material Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 abstract description 4
- 230000005284 excitation Effects 0.000 abstract description 4
- 230000006978 adaptation Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000003044 adaptive effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Fluid-Damping Devices (AREA)
Abstract
The utility model relates to a self-induction type magnetorheological shock-absorbing damping device, comprising a cylinder, a piston rod, a piston and an electromagnetic coil. The self-induction type magnetorheological shock-absorbing damping device is characterized in that one end of the piston rod is positioned outside the cylinder, and the other end is connected with the piston; a throttling channel is arranged between the inner side wall of the cylinder and the outer side wall of the piston and is internally filled with yielding liquid; the outer side of the piston is wound with the electromagnetic coil; the outer side of the cylinder is provided with a self-induction device which is internally provided with a strong magnet, a power rod and a magnetic shielding body; the power rod is fixedly connected with the piston rod and does dynamical reciprocating movement along with the piston rod; the power rod is internally wound with an induction coil, inducted current controls the yielding force of fluid by the electromagnetic coil. The damping device has the characteristics of active tuning, self environment adaptation and automatic change of damping characteristic along with environment excitation, simultaneously, does not need outside energy and a sensing system, and has good stability and robust performance.
Description
Technical field
The utility model relates to the engineering damping technology, specifically, relates to damping device.
Background technique
The fluid damping technology is a kind of vibration damping controlling method of function admirable, it is based on the principle of flow of pore, by regulating the size of pore with non-uniform cross section, thereby regulate the span of damping constant, has good oscillation damping and energy dissipating effect, new life has been injected in the development that appears as damping that with the magnetic flow liquid is the intellectual material of representative in recent years, and they combine the fluid damping technology with the strategy of ACTIVE CONTROL, has brought into play very big using value in various vibration dampings field gradually.
But, surrender fluid damping device in the market still belongs to the category of intelligence-half active control technology, and on the one hand, damper drives needs ABAP Adapter control, stability to power supply has higher requirements, and this in emergency circumstances often can't guarantee for disaster generation etc.; On the other hand, effective performance of damper performance largely depends on the decision-making and the driving of extraneous control centre again, therefore control law and sensed system all there is higher requirement, because the selection of control law is improper and the error of sensed system brings bigger influence all can for the performance quality of damper.
In addition, at present the phase difference that causes of the Time Delay of control system also often causes serious destruction to the effect of control system, and these are all undoubtedly to the development of vibration control technology with apply and constitute great obstacle.
The model utility content
The purpose of this utility model is to overcome the above-mentioned defective that exists in the prior art, a kind of self-inducting magneto-rheological vibration damping damping device is provided, this damping device has adaptive ability, in the time of in working order, this damping device can be according to the automatic induced current of extraneous vibration situation, and with this damping characteristic that electric current enforcement is controlled and fluid is surrendered in driving, thereby the damping capacity of enforcement adjusting damper has good stability and adaptive characteristic; And this damping device has the characteristics of initiatively tuning and environment self-adaption, does not need outside energy and sensed system simultaneously, has the advantages that to change damping characteristic automatically with environmental excitation, has good stable and robust performance simultaneously.
A kind of self-inducting magneto-rheological vibration damping damping device that the utility model provides comprises cylinder barrel, piston rod, piston and electromagnetic coil, and its improvements are that an end of described piston rod is positioned at the outside of cylinder barrel, and the other end is connected with piston; Be provided with throttling passage between described cylinder barrel madial wall and the piston outer side wall, be provided with surrender liquid in the throttling passage, the piston outer felt is around electromagnetic coil; The outside of described cylinder barrel is provided with the self-induction device, is provided with strong magnets, power lever and magnetic shield in the self-induction device, and power thick stick and piston rod are fixed, and does the power to-and-fro motion with piston rod; Twine inductor coil in the described power lever, the electric current of induction is by solenoid controlled fluid yield force.
The first preferred self-inducting magneto-rheological vibration damping damping device that the utility model provides, described damping device comprises end cap, dynamic seal circle and draw ring or bulb; Described dynamic seal circle is located at the joint of power lever and piston rod and cylinder barrel or self-induction device; Described draw ring or bulb are located at piston rod and are positioned at the outer end of cylinder barrel.
The second preferred self-inducting magneto-rheological vibration damping damping device that the utility model provides, described self-induction device and cylinder barrel are isolated by magnetic shield, piston rod passes cylinder barrel and extends to self-induction device inside, but and be tied with the inductor coil of induced current in the extending end outside, the inductor coil of self-induction device is connected with the electromagnetic coil of surrender fluid cylinder barrel.
The 3rd preferred self-inducting magneto-rheological vibration damping damping device that the utility model provides, described piston rod adopts non-magnet material.
The 4th preferred self-inducting magneto-rheological vibration damping damping device that the utility model provides, described non-magnet material is a stainless steel.
The 5th preferred self-inducting magneto-rheological vibration damping damping device that the utility model provides, described power lever adopts permeability magnetic material.
The 6th preferred self-inducting magneto-rheological vibration damping damping device that the utility model provides, described surrender liquid is magnetic flow liquid.
The non-magnet material that piston rod adopts, except that stainless steel, also can be for the other materials of equivalent effect is arranged with stainless steel;
Permeability magnetic material can be pure iron, low carbon steel or other permeability magnetic materials; Piston rod is connected with the form of power lever by welding or bolt.
The electromagnetic coil number of turn and big I in the surrender fluid cylinder barrel determine that according to surrender damping characteristic, damper performance parameter and the extraneous vibration situation of fluid the number of turn of the inductor coil in the self-induction device and big I are determined according to the situation of electromagnetic coil in dynamic excitation situation and the surrender fluid cylinder barrel.
The self-inducting magneto-rheological vibration damping damping device that the utility model provides, this device is a kind of damping device with good stability, it need not the instruction of extraneous control centre, do not need simultaneously smart quick sensed system yet, it can have good stable with the faradic characteristic of variation real time altering of dynamic excitation when destructive dynamic actions such as earthquake take place.
The self-inducting magneto-rheological vibration damping damping device that the utility model provides is a kind of well behaved passive energy dissipation damping device, can generally be applicable in the vibration control of unique constructions such as automobile, machinery, aviation, civil engineering and electric transmission line.
The working principle of a kind of self-inducting magneto-rheological vibration damping damping device that the utility model provides:
1, when bearing less impact load, this moment, the vibrational energy of damper piston and piston rod was less, damper should mainly show as the power consumption effect, the surrender fluid need not to reach yield situation in the damper, it mainly acts on viscous force, during use, it is reciprocating with respect to cylinder barrel that the reciprocal external force at damper two ends promotes piston rod, this moment is because vibratory output is less, power lever vibratory output in the self-induction device is also less, produce induction current in the inductor coil hardly or only produce very little induction current, this moment, the self-induction device participated in work hardly;
2, when bearing the greater impact load, this moment, the vibrational energy of damper piston and piston rod was also bigger, and damper should mainly show as spacing and lock function, and the surrender fluid should be based on the fluid yield force, so need bigger Current Control in the damper under this state.During use, the reciprocal external force at damper two ends promotes piston rod and does bigger double vibrations with respect to cylinder barrel, the interior inductor coil of self-induction device this moment is also done bigger to-and-fro motion in company with power lever, under powerful the action of a magnetic field, produce bigger induction current, and the power of electric current changes and becomes with power vibration of bar situation, the electric current of inductor coil reaches the electromagnetic coil in the cylinder barrel, produce the magnetic field of corresponding size, thereby constantly change the surrender damping force of surrender fluid in the damper, reach the purpose of vibration power consumption on the one hand, also limited the vibration displacement of damper on the other hand.
Compared with prior art, a kind of self-inducting magneto-rheological vibration damping damping device of providing of the utility model has the following advantages:
1, the self-induction device is set in the damper, self-induction current in extraneous vibration processes, and with this as the control energy, externally do not have any energy and rely on, more do not have the stable power requirement, energy-saving and environmental protection, control stability are good;
2, the self-induction device that is provided with in the damper, its faradic power and variation tendency have directly reflected the vibration situation of external environment, need not smart quick sensed system, the assurance that more is easy to get of control effect is better to the adaptability and the robustness of environment;
3, when bearing less vibrating load, damper mainly shows as the power consumption effect, and when bearing the greater impact load, damper not only consumes energy but also spacing, has good adaptive performance;
4, damper structure simplicity of design, processing, convenient disassembly, reusable have good reliability and using value;
5, Applicable scope is wider.
Description of drawings
Fig. 1 is: the structural drawing of a kind of self-inducting magneto-rheological vibration damping damping device that the utility model provides;
Among the figure, 1, throttling passage; 2, piston rod; 3, cylinder barrel; 4, end cap; 5, piston; 6, electromagnetic coil; 7, inductor coil; 8, magnetic shield; 9, surrender fluid (being magnetic flow liquid); 10, strong magnets; 11, self-induction device; 12, power lever; 13, dynamic seal circle; 14, draw ring or bulb.
Embodiment
Below by the drawings and the specific embodiments a kind of self-inducting magneto-rheological vibration damping damping device that the utility model provides is done further more detailed description.
Embodiment 1
The self-inducting magneto-rheological vibration damping damping device of present embodiment as shown in Figure 1, comprises cylinder barrel 3, piston rod 2, piston 5, electromagnetic coil 6, end cap 4, dynamic seal circle 13 and draw ring 14; Wherein, an end of piston rod 2 is positioned at the outside of cylinder barrel 3, and the other end is connected with piston 5; Be provided with throttling passage 1 between cylinder barrel 3 madial walls and piston 5 outer side walls, be provided with surrender liquid 9 in the throttling passage 1, piston 5 outer felt are around electromagnetic coil 6; The outside of cylinder barrel 3 is provided with self-induction device 11, is provided with strong magnets 10, power lever 12 and magnetic shield 8 in the self-induction device 11, and power thick stick 12 is fixed with piston rod 2, and does the power to-and-fro motion with piston rod 2; Twine inductor coil 7 in the power lever 12, the electric current of induction is by electromagnetic coil 6 control fluid yield forces.
Dynamic seal circle 13 is located at the joint of power lever 12 and piston rod 2 and cylinder barrel 3; Draw ring 14 is located at piston rod 2 and is positioned at cylinder barrel 3 end outward.
Self-induction device 11 is isolated by magnetic shield 8 with cylinder barrel 3, piston rod 2 passes cylinder barrel 3 and extends to self-induction device 11 inside, but and be tied with the inductor coil 7 of induced current in the extending end outside, the inductor coil 7 of self-induction device 11 is connected with the electromagnetic coil 6 of surrender fluid cylinder barrel.
Piston rod 2 adopts the non-magnet material stainless steel, and power lever 12 adopts permeability magnetic material-low carbon steel, and surrender liquid 9 is magnetic flow liquid.
Embodiment 2
The self-inducting magneto-rheological vibration damping damping device of present embodiment as shown in Figure 1, comprises cylinder barrel 3, piston rod 2, piston 5, electromagnetic coil 6, end cap 4, dynamic seal circle 13 and bulb 14; Wherein, an end of piston rod 2 is positioned at the outside of cylinder barrel 3, and the other end is connected with piston 5; Be provided with throttling passage 1 between cylinder barrel 3 madial walls and piston 5 outer side walls, be provided with surrender liquid 9 in the throttling passage 1, piston 5 outer felt are around electromagnetic coil 6; The outside of cylinder barrel 3 is provided with self-induction device 11, is provided with strong magnets 10, power lever 12 and magnetic shield 8 in the self-induction device 11, and power thick stick 12 is fixed with piston rod 2, and does the power to-and-fro motion with piston rod 2; Twine inductor coil 7 in the power lever 12, the electric current of induction is by electromagnetic coil 6 control fluid yield forces.
Dynamic seal circle 13 is located at the joint of power lever 12 and piston rod 2 and self-induction device 11; Bulb 14 is located at piston rod 2 and is positioned at cylinder barrel 3 end outward.
Self-induction device 11 is isolated by magnetic shield 8 with cylinder barrel 3, piston rod 2 passes cylinder barrel 3 and extends to self-induction device 11 inside, but and be tied with the inductor coil 7 of induced current in the extending end outside, the inductor coil 7 of self-induction device 11 is connected with the electromagnetic coil 6 of surrender fluid cylinder barrel.
Piston rod 2 adopts non-magnet material, and non-magnet material is a stainless steel, and power lever 12 adopts permeability magnetic material-pure iron, and surrender liquid 9 is electrorheological fluid.
Should be noted that at last: above embodiment only is not intended to limit in order to the explanation the technical solution of the utility model; although the utility model is had been described in detail with reference to the foregoing description; those of ordinary skill in the field are to be understood that: the technician reads after the present specification still and can make amendment or be equal to replacement embodiment of the present utility model, but these modifications or change all do not break away within the claim protection domain that the utility model application awaits the reply.
Claims (7)
1. a self-inducting magneto-rheological vibration damping damping device comprises cylinder barrel (3), piston rod (2), piston (5) and electromagnetic coil (6), it is characterized in that an end of described piston rod (2) is positioned at the outside of cylinder barrel (3), and the other end is connected with piston (5); Be provided with throttling passage (1) between described cylinder barrel (3) madial wall and piston (5) outer side wall, be provided with surrender liquid (9) in the throttling passage (1), piston (5) outer felt is around electromagnetic coil (6); The outside of described cylinder barrel (3) is provided with self-induction device (11), be provided with strong magnets (10), power lever (12) and magnetic shield (8) in the self-induction device (11), power thick stick (12) is fixed with piston rod (2), and does the power to-and-fro motion with piston rod (2); Twine inductor coil (7) in the described power lever (12), the electric current of induction is by electromagnetic coil (6) control fluid yield force.
2. damping device according to claim 1 is characterized in that described damping device comprises end cap (4), dynamic seal circle (13) and draw ring or bulb (14); Described dynamic seal circle (13) is located at the joint of power lever (12) and piston rod (2) and cylinder barrel (3) or self-induction device (11); Described draw ring or bulb (14) are located at piston rod (2) and are positioned at the outer end of cylinder barrel (3).
3. damping device according to claim 1, it is characterized in that described self-induction device (11) and cylinder barrel (3) are isolated by magnetic shield (8), piston rod (2) passes cylinder barrel (3) and extends to self-induction device (11) inside, but and be tied with the inductor coil (7) of induced current in the extending end outside, the inductor coil (7) of self-induction device (11) is connected with the electromagnetic coil (6) of surrender fluid cylinder barrel.
4. damping device according to claim 1 is characterized in that described piston rod (2) adopts non-magnet material.
5. damping device according to claim 4 is characterized in that described non-magnet material is a stainless steel.
6. damping device according to claim 1 and 2 is characterized in that described power lever (12) adopts permeability magnetic material.
7. damping device according to claim 1 is characterized in that described surrender liquid (9) is magnetic flow liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205476577U CN201802803U (en) | 2010-09-29 | 2010-09-29 | Self-induction type magnetorheological shock-absorbing damping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205476577U CN201802803U (en) | 2010-09-29 | 2010-09-29 | Self-induction type magnetorheological shock-absorbing damping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201802803U true CN201802803U (en) | 2011-04-20 |
Family
ID=43872304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205476577U Expired - Lifetime CN201802803U (en) | 2010-09-29 | 2010-09-29 | Self-induction type magnetorheological shock-absorbing damping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201802803U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287474A (en) * | 2011-06-03 | 2011-12-21 | 嘉兴学院 | Self-powered and self-induction magnetorheological damper |
| CN102418765A (en) * | 2011-11-03 | 2012-04-18 | 重庆大学 | Self-perception, self-power supply and adaptive control magnetorheological vibration damping system |
| CN102588497A (en) * | 2011-12-12 | 2012-07-18 | 山东大学 | Electromagnetism and magnetorheological fluid mixed shock absorber |
| CN103233998A (en) * | 2013-05-08 | 2013-08-07 | 中南大学 | Outer magnet type mini MR (magnetorheological) damper |
| CN106292193A (en) * | 2015-05-24 | 2017-01-04 | 上海微电子装备有限公司 | Shock-absorbing means and vibration absorption method, Optical Coatings for Photolithography |
| CN108894347A (en) * | 2018-06-29 | 2018-11-27 | 山东大学 | A kind of magnetorheological intelligent tuning vibration absorber of half active |
| CN113431863A (en) * | 2021-04-22 | 2021-09-24 | 同济大学 | Damping self-adaptive tuning magnetorheological damper |
-
2010
- 2010-09-29 CN CN2010205476577U patent/CN201802803U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287474A (en) * | 2011-06-03 | 2011-12-21 | 嘉兴学院 | Self-powered and self-induction magnetorheological damper |
| CN102418765A (en) * | 2011-11-03 | 2012-04-18 | 重庆大学 | Self-perception, self-power supply and adaptive control magnetorheological vibration damping system |
| CN102418765B (en) * | 2011-11-03 | 2013-08-28 | 重庆大学 | Self-perception, self-power supply and adaptive control magnetorheological vibration damping system |
| CN102588497A (en) * | 2011-12-12 | 2012-07-18 | 山东大学 | Electromagnetism and magnetorheological fluid mixed shock absorber |
| CN103233998A (en) * | 2013-05-08 | 2013-08-07 | 中南大学 | Outer magnet type mini MR (magnetorheological) damper |
| CN106292193A (en) * | 2015-05-24 | 2017-01-04 | 上海微电子装备有限公司 | Shock-absorbing means and vibration absorption method, Optical Coatings for Photolithography |
| CN106292193B (en) * | 2015-05-24 | 2019-01-29 | 上海微电子装备（集团）股份有限公司 | Shock-absorbing means and vibration absorption method, Optical Coatings for Photolithography |
| CN108894347A (en) * | 2018-06-29 | 2018-11-27 | 山东大学 | A kind of magnetorheological intelligent tuning vibration absorber of half active |
| CN113431863A (en) * | 2021-04-22 | 2021-09-24 | 同济大学 | Damping self-adaptive tuning magnetorheological damper |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201875042U (en) | Self-induction type current variable shock absorption damper | |
| CN201802803U (en) | Self-induction type magnetorheological shock-absorbing damping device | |
| CN101968096A (en) | Self-driving magnetorheological damper | |
| CN104832585B (en) | Intelligent magneto-rheological elastomer vibroshock | |
| CN104309438B (en) | A kind of multi-state vehicle suspension | |
| CN107781345A (en) | A kind of Novel magneto-rheological damper of detectable piston displacement | |
| CN206429608U (en) | A kind of vibration damper with adjustable damping | |
| CN207554681U (en) | Vibration energy regeneration type magneto-rheological vibration damper | |
| CN103962883B (en) | The dynamic absorber lathe tool of mode of operation is extruded based on magnetic flow liquid | |
| CN206617495U (en) | The Novel magneto-rheological damper of damping force can directly be detected | |
| CN110056599A (en) | A kind of active magneto-rheological vibration damper of bitubular based on route-variable under shear mode | |
| CN209430666U (en) | A kind of self energizing stiffness variable and damping magneto-rheological vibration damper | |
| CN108458031B (en) | A kind of super mangneto squash type MR damper adaptive approach and damper | |
| CN106763374B (en) | A kind of semi-passive composite vibration isolator of active- | |
| WO2023279748A1 (en) | Hybrid damping mode-based high-output-force vibration isolation mount | |
| CN105805204B (en) | Passive linear magnetic negative stiffness device | |
| CN105020328B (en) | Magnetorheological vibration isolating suspension based on mixed mode | |
| CN100455843C (en) | Magnetic-fluid change type regulation-liquid column damper | |
| CN202023270U (en) | Limiting self-adaption vibration-reduction damping device | |
| CN202089711U (en) | Back-inclination preventing buffer device for arm support | |
| CN102094928A (en) | Fluid damper | |
| CN106015436B (en) | A kind of rank becomes magneto-rheological damper | |
| CN202531725U (en) | Double-barrel shock absorber | |
| CN107269757A (en) | A kind of MR fluid shock absorber of Direct Action Type rigidity controllable | |
| CN206595877U (en) | Electromagnetic type touches the raising frequency vibrational energy harvester that shakes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140321 Owner name: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140321 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100192 HAIDIAN, BEIJING TO: 100031 XICHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140321 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: China Electric Power Research Institute Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Patentee before: China Electric Power Research Institute |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110420 |