CN206914459U - A kind of statocone cartridge type installation of car for guarding against side turned over - Google Patents
A kind of statocone cartridge type installation of car for guarding against side turned over Download PDFInfo
- Publication number
- CN206914459U CN206914459U CN201720772375.9U CN201720772375U CN206914459U CN 206914459 U CN206914459 U CN 206914459U CN 201720772375 U CN201720772375 U CN 201720772375U CN 206914459 U CN206914459 U CN 206914459U
- Authority
- CN
- China
- Prior art keywords
- motor
- track
- built
- cone cylinder
- control unit
- 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.)
- Active
Links
Abstract
The utility model discloses a kind of statocone cartridge type installation of car for guarding against side turned over, comprising left actuating motor 1, left lever 2, left track 3, cone cylinder 4, right actuating motor 7, right pull bar 6, right track 5, bearing 8, orbits controlling unit 9 and rolls angle transducer 10.Internal battery 45, lateral acceleration sensor 41, built-in motor control unit 42, built-in motor 43 and small flywheel 44 are included in its middle conical tube 4.The utility model controls spacing on the outside of track to adjust the position of cone cylinder 4 to realize quality releveling by measuring vehicle roll angle, and the rotation of measurement side acceleration control small flywheel 44 reaches the purpose of anti-rollover in terms of resisting the obstruction two that side acceleration move to cone cylinder 4.
Description
Technical field
The present invention relates to the present invention relates to car for guarding against side turned over active safety field, more particularly to a kind of transverse mass releveling
Anti-side-turning device.
Background technology
Rollover is that a kind of incidence is relatively low but accident that fatal rate of causing injury is high, annual because vehicle side turning accident causes
Death toll occupy at a relatively high ratio in the lethal number of traffic accident total then.Nowadays, to the research of rollover
Gradually deeply, the design and scheme for anti-rollover are also more and more right.The method of currently used directly anti-roll moments is usual
There are balance block type, Active suspension formula and anti-roll posture etc..Wherein Active suspension formula is difficult to obtain because the present art limits
Widely use, cost is very high, and anti-roll posture can protruding anti-rolling support, external environment there are certain requirements, also hold
Easily injure other vehicles and pedestrian.And the Anti-side-turning device of balance block type is easier to realize compared with Active suspension formula, more anti-roll posture
Do not occur directly to contact with the thing outside car and people.
Nowadays, many scholars and researcher design and explore the Anti-side-turning device of balance block type.
A kind of " Anti-side-turning device " (number of patent application of the Gong Pi states invention in Shandong:201510140538.7) car perceived by level meter
Rolling condition, the purpose of anti-rollover is reached by motor mobile counterweight lead.But, the device is in mobile lead, lead
Acceleration produced entirely by motor.It is larger in view of the quality of counterweight lead, then in order to which device reaction speed is, it is necessary to high-power
Motor, so, the power consumption of device is also big." the anti-side of automobile of the Ma Genchang inventions of Suzhou Rentgen Design Co., Ltd.
Turn over system " (number of patent application:201210151720.9) thrust by damper to support bar, then made greatly by hydraulic pressure transfer
The heavy-fluid of density is shifted to reach balanced transversal load between the heavy-fluid chamber of left and right, reaches anti-rollover purpose.But most heavy-fluids
Density has potential risk of pollution still less than the density of the solid metallics such as iron, lead using liquid mercury.Therefore this method is only fitted
For dilly, oversize vehicle is not suitable for.
The content of the invention
The technical problems to be solved by the invention are to be directed to the defects of involved in background technology, there is provided one kind balance
Cone cylinder formula installation of car for guarding against side turned over and method, by measure vehicle roll angle control track on the outside of spacing adjust cone cylinder position come
Realize that quality releveling, and measurement side acceleration control what the rotation of small flywheel was moved to resist side acceleration to cone cylinder
Two aspects are hindered to reach the purpose of anti-rollover.
The present invention uses following technical scheme to solve above-mentioned technical problem:
A kind of statocone cartridge type installation of car for guarding against side turned over includes actuating motor, pull bar, track, bearing 8, cone cylinder 4, control list
Member 9 and obliquity sensor 10;Wherein,
The bearing 8 is arranged in the symmetrical axial location of vehicle frame or unitary construction vehicle body, in 8 liang of the bearing
Side is installed by parallel track;
The track includes left track 3 and right track 5, is formed by the rod member being placed in parallel, and its one end is hinged on bearing 8
On, the other end is coupled by screw thread with pull bar, is rotated and is moved with pull bar;
The actuating motor includes left actuating motor 1 and right actuating motor 7, and left actuating motor 1 and right actuating motor 7 are installed
On vehicle frame or unitary construction vehicle body, cylinder lever connecting rod controls two lateral bracing struts to rotate respectively;The pull bar, which rotates, makes track top
Spacing become big or diminish;
The orbits controlling unit 9 and inclination angle transducer 10 are arranged on vehicle frame or unitary construction vehicle body, angle of heel
Sensor 10 detects body roll state, and orbits controlling unit 9 provides input signal, and orbits controlling unit 9 controls actuating motor
Operation;
The cone cylinder 4 is initially attached to the junction of left track 3 and right track 5, bored in the connected shape of two conical bottoms
4 axis of cylinder are parallel with automobile fore-and-aft direction, and it is rolled in orbit.
Further, internal battery 45, lateral acceleration sensor 41, built-in motor control are installed inside the cone cylinder 4
Unit 42, built-in motor 43 and small flywheel 44 processed;
The internal battery 45 provides to lateral acceleration sensor 41, built-in motor control unit 42 and built-in motor 43
Electric energy;
The lateral-acceleration sensor measures cone cylinder 4 measures side acceleration and provided to built-in motor control unit 42
Input signal;
The built-in motor control unit 42 controls the operation of built-in motor 43;
The small flywheel 44 is located on the axis of cone cylinder 4, and on the output shaft of built-in motor 43, with built-in motor 43
Move and move.
Further, the motor, pull bar, track are symmetrical arranged centered on bearing.
The present invention also provides a kind of anti-rollover control method of statocone cartridge type installation of car for guarding against side turned over, this method include with
Lower step:
Step 1), automobile start, device are started working, and roll the angle of heel that angle transducer 10 detects vehicle body, lateral to accelerate
Spend sensor 41 and gather the side acceleration values of cone cylinder 4;
Step 2), orbits controlling unit 9 receives and the data of analysis side obliquity sensor 10, built-in motor control unit 42
Receive and analyze the data of lateral acceleration sensor 41;
Step 3), when vehicle body has rollover trend, the orbits controlling unit 9 judges body roll direction, is held by control
Row motor come control roll direction reverse siding track top distance;The built-in motor control unit 42 judges acceleration side
Rolled to the direction opposite with acceleration to and by controlling small flywheel 44 to turn the control cone cylinder 4 to acceleration direction;
Step 4), body roll are controlled, and are rolled the angle of heel absolute value that angle transducer 10 detects and are accelerated with lateral
The side acceleration values that degree sensor 41 detects have downward trend;
Step 5), when built-in motor control unit 42 according to the data regression acceleration rate threshold of lateral acceleration sensor 41 with
When lower, control built-in motor 43 exits work, and the rotating speed of small flywheel 44 gradually decreases up to back to zero, and orbits controlling unit 9 controls rail
Road top distance diminishes, and track returns to initial parallel state;
Step 6), body roll degree have returned to safety zone, and device executing agency exits work, rolls angle transducer 10
Worked on lateral acceleration sensor 41.
Further, the step 3) is specially:
Step 3.1.1), when orbits controlling unit 9 according to the inclination data of angle transducer 10 just to judge that vehicle body rolls to the left,
When being more than angle of heel threshold value according to the absolute value of sensing data, right actuating motor 7 is controlled to intervene work, right actuating motor 7 is logical
Crossing right pull bar 6 makes the top of right track 5 distance become big, and right track 5 is in " eight words " shape;
Step 3.1.2), when built-in motor control unit 42 judges laterally according to the data of lateral acceleration sensor 41 to be positive
To the left, value when exceeding acceleration rate threshold according to the data of lateral acceleration sensor 41 calculates the target of small flywheel 44 in acceleration direction
Rotating speed, and control built-in motor 43 to drive small flywheel 44 to rotate counterclockwise to the left, and maintain rotating speed of target;
Step 3.1.3), under the collective effect of right actuating motor 7 and built-in motor 43, cone cylinder 4 is rolled to the right along right track 5
It is dynamic, realize that transverse mass is reallocated;
The control process of opposite side is identical.
Further, the step 5) is specially:
Step 5.1.1), when built-in motor control unit 42 judges laterally according to the data of lateral acceleration sensor 41 to be positive
Acceleration direction to the left, during according to below the data regression acceleration rate threshold of lateral acceleration sensor 41, controls built-in motor 43
Work is exited, the rotating speed of small flywheel 44 gradually decreases up to back to zero;
Step 5.1.2), when orbits controlling unit 9 according to the inclination data of angle transducer 10 just to judge that vehicle body rolls to the left,
When being returned to according to the absolute value of sensing data in angle of heel threshold value, right actuating motor 7 is controlled to make right track by right pull bar 6
5 top distances diminish, and right track 5 returns to initial parallel state;
Step 5.1.3), under actuating motor and the collective effect of built-in motor 43, cone cylinder 4 gradually returns to initial balance position
Put;
The control process of opposite side is identical.
The orbits controlling unit 9 works independently with built-in motor control unit 42 and is independent of each other;
Side acceleration sets safety value scope to be more than side in orbits controlling unit 9 in the built-in motor control unit 42
Inclination angle sets safety value scope, and built-in motor 43, which is later than left actuating motor 1 and right actuating motor 7, to be intervened, earlier than left actuating motor 1
Exited with right actuating motor 7.
The present invention compared with prior art, has following technique effect using above technical scheme:
1. efficient energy-saving, in equilibrium process, barycenter declines while cone cylinder 4 rolls, and its gravitional force is converted into rolling
When kinetic energy, reduce power consumption;
2. the reaction time is short, the counterweight process of cone cylinder 4 is realized under built-in motor 43 and gravity collective effect, during counterweight
Possess bigger acceleration;
3. applicable all types of automobile, common problem of the device design based on vehicle side turning, in practical application, phase
The mass of cone cylinder 4 and plant bulk should be adjusted to be mountable on different types of automobile.
Brief description of the drawings
Fig. 1 is a kind of statocone cartridge type installation of car for guarding against side turned over schematic diagram of the present invention.
Fig. 2 is middle conical tube internal structure schematic diagram of the present invention.
In figure, the left actuating motors of 1-, 2- left levers, 3- left tracks, 4- cone cylinders, 5- right tracks, the right pull bars of 6-, the right execution of 7-
Motor, 8- bearings, 9- orbits controlling units, 10- roll angle transducer, 11- power supplys, 41- lateral acceleration sensors, in 42-
Put motor control unit, 43- built-in motors, 44- small flywheels, 45- internal batteries.
Embodiment
Technical scheme is described in further detail below in conjunction with the accompanying drawings:
As shown in figure 1, the invention discloses a kind of statocone cartridge type installation of car for guarding against side turned over, left actuating motor 1, a left side are included
Pull bar 2, left track 3, cone cylinder 4, right actuating motor 7, right pull bar 6, right track 5, bearing 8, orbits controlling unit 9 and angle of heel pass
Sensor 10;
The bearing 8 is arranged in the symmetrical axial location of vehicle frame or unitary construction vehicle body, to install left rail
Road 3 and right track 5;
The left track 3 is made up of two rod members being placed in parallel, and bottom is hinged on the left side of bearing 8, and top passes through screw thread
Couple with left lever 2, can rotate and move with left lever 2;
The right track 5 is made up of two rod members being placed in parallel, and bottom is hinged on the right side of bearing 8, and top passes through screw thread
Couple with right pull bar 6, can rotate and move with right pull bar 6;
The left actuating motor 1 is arranged on vehicle frame or unitary construction vehicle body, for controlling the rotation of left lever 2;
The right actuating motor 7 is arranged on vehicle frame or unitary construction vehicle body, for controlling the rotation of right pull bar 6;
The left lever 2, which rotates, can make the spacing on the top of left track 3 become big or diminish, and the right pull bar 6, which rotates, can make the right side
The spacing on the top of track 5 becomes big or diminished;
The orbits controlling unit 9 and inclination angle transducer 10 are arranged on vehicle frame or unitary construction vehicle body, angle of heel
Sensor 10 detects body roll state, and orbits controlling unit 9 provides input signal, and orbits controlling unit 9, which controls, left performs electricity
The operation of machine 1 and right actuating motor 7;
The power supply 11 is arranged on vehicle frame or unitary construction vehicle body, for left actuating motor 1, right actuating motor 7,
Roll angle transducer 10 and orbits controlling unit 9 provides electric energy;
The cone cylinder 4 is initially attached to the bottom end of left track 3 and right track 5, bored in the connected shape of two conical bottoms
4 axis of cylinder are parallel with automobile fore-and-aft direction, and it is rolled in orbit;
Be provided with inside the cone cylinder 4 internal battery 45, lateral acceleration sensor 41, built-in motor control unit 42,
Built-in motor 43 and small flywheel 44;
The internal battery 45 provides to lateral acceleration sensor 41, built-in motor control unit 42 and built-in motor 43
Electric energy;
The lateral and velocity sensor measures the lateral and speed that cone cylinder 4 is subject to and carried to built-in motor control unit 42
For input signal;
The built-in motor control unit 42 controls the operation of built-in motor 43;
The small flywheel 44 is located on the axis of cone cylinder 4, and on the output shaft of built-in motor 43, with built-in motor 43
Move and move.
The invention also discloses a kind of anti-rollover control method of statocone cartridge type installation of car for guarding against side turned over, following step is included
Rapid and situation:
1 when automobile normal running:
Device is started working after automobile starting, rolls the angle of heel that angle transducer 10 detects vehicle body, and side acceleration passes
Sensor 41 gathers the side acceleration values of cone cylinder 4;Orbits controlling unit 9 receives and the data of analysis side obliquity sensor 10, built-in
Motor control unit 42 receives and analyzes the data of lateral acceleration sensor 41;Each executing agency is in holding state.
2 when automobile occurs to turn on one's side to the left:
Orbits controlling unit 9 is according to the data of angle transducer 10 are rolled just to judge that vehicle body rolls to the left, according to sensor number
According to absolute value be more than angle of heel threshold value when, control right actuating motor 7 to intervene work, right actuating motor 7, which rotates right pull bar 6, makes the right side
The top of track 5 distance becomes big, and right track 5 is in " eight words " shape.Cone cylinder 4 is pushed up along right track 5 to right track 5 under gravity
End rolls.Herein, although the top of right track 5 is higher than bottom, the spacing on top is big compared with bottom, and cone cylinder 4 has on top
Smaller gravitional force.When built-in motor control unit 42 judges lateral accelerate according to the data of lateral acceleration sensor 41 to be positive
Spend direction to the left, exceed acceleration rate threshold according to the data of lateral acceleration sensor 41, calculated according to current acceleration magnitude small
The rotating speed of target of flywheel 44, and control built-in motor 43 to drive small flywheel 44 to rotate counterclockwise to the left, and maintain rotating speed of target.Cone
For cylinder 4 in the presence of angular momentum balance relation, overcoming side acceleration makes its trend to left movement, is opened to the right along track
Begin to roll.Now, cone cylinder 4 rolls in the presence of gravity and angular momentum balance are dual along track to track top.In cone cylinder 4 certainly
Under the influence of body weight, the degree that automobile rolls to the left reduces, it is therefore prevented that the generation of rollover.When built-in motor control unit 42 is examined
When measuring current side acceleration values and being less than acceleration rate threshold, built-in motor 43 is stopped, and the rotating speed of small flywheel 44 gradually drops
It is low.When orbits controlling unit 9 is detected when front side rake angle is less than angle of heel threshold value, right actuating motor 7 is controlled, rotates right pull bar
6 make the top of right track 5 return to initial parallel state.Cone cylinder 4 is final under gravity, returns to left track 3 and right track 5
Bottom.Body roll degree has returned to safety zone, and device executing agency temporarily exits work, rolls angle transducer 10 and side
Worked on to acceleration transducer 41.
(1) when automobile is turned on one's side to the right
Orbits controlling unit 9 is that negative judgement vehicle body rolls to the right according to the data of angle transducer 10 are rolled, according to sensor number
According to absolute value be more than angle of heel threshold value when, control left actuating motor 1 to intervene work, left actuating motor 1, which rotates left lever 2, makes a left side
The top of track 3 distance becomes big, and left track 3 is in " eight words " shape.Cone cylinder 4 is pushed up along left track 3 to left track 3 under gravity
End rolls.Herein, although the top of left track 3 is higher than bottom, the spacing on top is big compared with bottom, and cone cylinder 4 has on top
Smaller gravitional force.When built-in motor control unit 42 laterally accelerates according to the data of lateral acceleration sensor 41 for negative judgement
Spend direction to the right, exceed acceleration rate threshold according to the data of lateral acceleration sensor 41, calculated according to current acceleration magnitude small
The rotating speed of target of flywheel 44, and control built-in motor 43 to drive small flywheel 44 to rotate clockwise to the right, and maintain rotating speed of target.Cone
Cylinder 4 overcomes the trend that side acceleration moves right it, opened to the left along track in the presence of angular momentum balance relation
Begin to roll.Now, cone cylinder 4 rolls in the presence of gravity and angular momentum balance are dual along track to track top.In cone cylinder 4 certainly
Under the influence of body weight, the degree that automobile rolls to the right reduces, it is therefore prevented that the generation of rollover.When built-in motor control unit 42 is examined
When measuring current side acceleration values and being less than acceleration rate threshold, built-in motor 43 is stopped, and the rotating speed of small flywheel 44 gradually drops
It is low.When orbits controlling unit 9 is detected when front side rake angle is less than angle of heel threshold value, left actuating motor 1 is controlled, rotates left lever
2 make the top of left track 3 return to initial parallel state.Cone cylinder 4 is final under gravity, returns to left track 3 and right track 5
Bottom.Body roll degree has returned to safety zone, and device executing agency temporarily exits work, rolls angle transducer 10 and side
Worked on to acceleration transducer 41.
Those skilled in the art of the present technique are it is understood that unless otherwise defined, all terms used herein include skill
Art term and scientific terminology have the general understanding identical meaning with the those of ordinary skill in art of the present invention.Should also
It should be appreciated that those terms defined in such as general dictionary should be understood that with the context of prior art
The consistent meaning of meaning, and unless defined as here, will not be explained with the implication of idealization or overly formal.
Claims (3)
- A kind of 1. statocone cartridge type installation of car for guarding against side turned over, it is characterised in that comprising actuating motor, pull bar, track, bearing (8), Cone cylinder (4), control unit (9) and obliquity sensor (10);Wherein,The bearing (8) is arranged in the symmetrical axial location of vehicle frame or unitary construction vehicle body, in the bearing (8) two Side is installed by parallel track;The track includes left track (3) and right track (5), is formed by the rod member being placed in parallel, and its one end is hinged on bearing (8) on, the other end is coupled by screw thread with pull bar, is rotated and is moved with pull bar;The actuating motor includes left actuating motor (1) and right actuating motor (7), left actuating motor (1) and right actuating motor (7) On vehicle frame or unitary construction vehicle body, cylinder lever connecting rod controls two lateral bracing struts to rotate respectively;The pull bar, which rotates, makes track The spacing on top becomes big or diminished;The orbits controlling unit (9) and inclination angle transducer (10) are arranged on vehicle frame or unitary construction vehicle body, angle of heel Sensor (10) detects body roll state, and orbits controlling unit (9) provides input signal, and orbits controlling unit (9) control is held The operation of row motor;The shape that the cone cylinder (4) is connected in two conical bottoms, the junction of left track (3) and right track (5) is initially attached to, Cone cylinder (4) axis is parallel with automobile fore-and-aft direction, and it is rolled in orbit.
- A kind of 2. statocone cartridge type installation of car for guarding against side turned over according to claim 1, it is characterised in thatInternal battery (45), lateral acceleration sensor (41), built-in motor control unit are installed inside the cone cylinder (4) (42), built-in motor (43) and small flywheel (44);The internal battery (45) gives lateral acceleration sensor (41), built-in motor control unit (42) and built-in motor (43) Electric energy is provided;The lateral-acceleration sensor measures cone cylinder (4) measures side acceleration and provided to built-in motor control unit (42) Input signal;The operation of built-in motor control unit (42) the control built-in motor (43);The small flywheel (44) is located on cone cylinder (4) axis, and on built-in motor (43) output shaft, with built-in motor (43) motion and move.
- 3. a kind of statocone cartridge type installation of car for guarding against side turned over according to claim 1, it is characterised in that the motor, drawing Bar, track are symmetrical arranged centered on bearing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201720772375.9U CN206914459U (en) | 2017-06-29 | 2017-06-29 | A kind of statocone cartridge type installation of car for guarding against side turned over |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201720772375.9U CN206914459U (en) | 2017-06-29 | 2017-06-29 | A kind of statocone cartridge type installation of car for guarding against side turned over |
Publications (1)
Publication Number | Publication Date |
---|---|
CN206914459U true CN206914459U (en) | 2018-01-23 |
Family
ID=61323215
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201720772375.9U Active CN206914459U (en) | 2017-06-29 | 2017-06-29 | A kind of statocone cartridge type installation of car for guarding against side turned over |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN206914459U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107458481A (en) * | 2017-06-29 | 2017-12-12 | 南京航空航天大学 | A kind of statocone cartridge type installation of car for guarding against side turned over and method |
-
2017
- 2017-06-29 CN CN201720772375.9U patent/CN206914459U/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107458481A (en) * | 2017-06-29 | 2017-12-12 | 南京航空航天大学 | A kind of statocone cartridge type installation of car for guarding against side turned over and method |
CN107458481B (en) * | 2017-06-29 | 2023-09-26 | 南京航空航天大学 | Balanced cone-type automobile rollover prevention device and method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107458481A (en) | A kind of statocone cartridge type installation of car for guarding against side turned over and method | |
CN104309709B (en) | A kind of anti-rollover groove tank car | |
CN112896215B (en) | Active tilting and swinging system for rail transit | |
CN101451915B (en) | Thrust roller for preventing machine from deflecting by auto-adapting position of wheel and diameter of tyres for roller test stand | |
CN103487264A (en) | Testing device for single-wheel traction performance | |
CN101458172A (en) | Vehicle seat intensity comprehensive test machine | |
CN206914459U (en) | A kind of statocone cartridge type installation of car for guarding against side turned over | |
CN110329107A (en) | A kind of batteries of electric automobile voltage detecting system | |
CN102095567A (en) | Forced yawing-free rolling wind tunnel test device | |
CN109249311B (en) | Electric control roller vibration damper with improved inertia capacity | |
CN106335542B (en) | Four-wheel independent steering gear and working method | |
CN107860545A (en) | The six degree of freedom system of large-scale transonic wind tunnel big load model captive trajectory testing | |
CN104535353B (en) | Wind turbine generator dynamic characteristic simulation experiment device adjustable in inclination installation angle | |
CN207058557U (en) | four-degree-of-freedom tandem type motion simulation platform | |
CN201484665U (en) | Auxiliary supporting device of passenger boarding bridge | |
CN201983990U (en) | Bridge running fatigue test loading device | |
CN106482972A (en) | A kind of dual pathways Electromechanical Actuators experimental facilitiess | |
CN207773130U (en) | Tractor trailer train multispan formula overhead trackless transportation facility and walked on the facility | |
CN102642454B (en) | A kind of method for reducing vibrations kinetic energy rejection and providing kinetic energy for electric automobile generating | |
CN202075579U (en) | Horizontal control system of operating platform based on gravity regulation | |
CN109297708A (en) | A kind of automobile hub bearing test mounting tool | |
CN206598155U (en) | A kind of special-shaped glass automatic edging machine swinging crossbeam | |
CN212159065U (en) | Reliable durability test device of new energy automobile drive shaft assembly | |
CN208704864U (en) | A kind of self balancing device | |
CN111648336A (en) | Hydraulic ship lift with linear motor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant |