CN105901857B - A kind of intelligence umbrella - Google Patents
A kind of intelligence umbrella Download PDFInfo
- Publication number
- CN105901857B CN105901857B CN201610340364.3A CN201610340364A CN105901857B CN 105901857 B CN105901857 B CN 105901857B CN 201610340364 A CN201610340364 A CN 201610340364A CN 105901857 B CN105901857 B CN 105901857B
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- umbrella
- rain
- umbrella handle
- wind
- handle
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- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
- A45B3/00—Sticks combined with other objects
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
- A45B17/00—Tiltable umbrellas
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
- A45B25/00—Details of umbrellas
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
- A45B17/00—Tiltable umbrellas
- A45B2017/005—Tiltable umbrellas with additional rotation about a vertical axis
Landscapes
- Walking Sticks, Umbrellas, And Fans (AREA)
Abstract
The invention discloses a kind of intelligent umbrellas, it further include wind speed wind direction sensor, controller and umbrella handle rotary actuator, the wind speed wind direction sensor is arranged at the top of umbrella cover, the umbrella handle rotary actuator is arranged on umbrella handle is divided into top umbrella handle and lower part umbrella handle by umbrella handle, the controller is arranged in the top of umbrella handle rotary actuator, the umbrella handle rotary actuator control top umbrella handle rotates an angle automatically, so that fall direction in the same direction for top umbrella handle and rain, just and the perpendicular angle of rain descent direction to umbrella cover.By above-mentioned, the present invention can be on severe rainy day, it especially blows weather, wind speed and direction is obtained in real time using wind speed wind direction sensor, then the falling direction of rain is calculated, and umbrella handle rotation is controlled according to the direction, allows umbrella that can automatically adjust the direction of umbrella handle and umbrella cover according to the landing direction of rain, so that umbrella cover is directed at raindrop falling direction, it is preferably user's rain cover.
Description
Technical field
The present invention relates to the technical fields of umbrella manufacturing, are provided in particular in a kind of intelligent umbrella.
Background technology
Umbrella is a kind of tool covering sleet prevents people's quilt in rainy or weather support of snowing at the crown position of people
Rain or snow drench.It is what the B.C. wife by master craftsman of the Spring and Autumn period in 1000 invented in Chinese umbrella, just began to use rain in 18th century in Britain
Umbrella.Over the past thousands of years, the design and manufacture of umbrella are being constantly progressive, for the structure design of umbrella, including straight rod umbrella, two fold
Umbrella, three folded umbrellas, hand parachute-opening, automatic umbrella etc.；Include plastic umbrella, oiled paper umbrella, cotton umbrella, nylon umbrella etc. from the selection of material；From outer
The type for including in design is seen with regard to more.So far, the development of umbrella is still along traditional direction in progress, purpose
Exactly improve convenience, versatility and apparent attractability that umbrella uses.
In umbrella in use, the limitation of the rain cover area due to umbrella, the people to open an umbrella usually need according to rainy situation tune
Umbrella direction and position in whole hand, to avoid being moistened by rain, especially umbrella area is smaller and has the case where wind even more such as
This.At the weather for raining but also blowing not only, rain usually vertically will not fall on underground from the sky, but can sideling fall to the ground,
Therefore referred to as blinding wind rain, in this case, rain is with the variation of wind direction and real-time change, wind blow from east to west, and rain also can be from east orientation
West descends slowly and lightly, while the change that rain descends slowly and lightly also with the variation of wind-force on direction, and under gentle breeze state, rain is only slightly from vertical
Histogram is to offset, and under strong wind state, it is more that rain can be biased to vertical direction with blowing by wind.
It usually in blinding wind rain, that is, makes one to open an umbrella, rain may also be fallen on the body of people, because umbrella cannot hide completely
The rain firmly wafted from side, so the people to open an umbrella may be caught in the rain to especially head body part below is natural at this time
Reaction be exactly that umbrella is tilted into an angle slightly, it is desirable to the centre face of umbrella rains the direction fallen, makes oneself not to be caught in the rain
It arrives.But often this manually adjusts and can not cover rain completely and fall on the body of people, one the reason is that can able person in umbrella
It cannot make accurate judgment to the direction floatd when raining, or even make the judgement of opposite direction, it is opposite so as to cause umbrella to be biased to
Direction, be caught in the rain to the case where, Another reason is even if being made that correct judgement, the offset side actually to open an umbrella to rain direction of floaing
To that cannot reach completely the same with rain direction of floaing, lead to the situation that cannot shelter from blinding wind rain completely.Moreover, wind can not only change
The direction of rain can also blow the direction of umbrella, cause the direction that descends slowly and lightly of rain consistent with the offset direction of umbrella, all relatively swash in rain and wind
It is possible to umbrella occur in the case of strong to be blown to the position that cannot block human body.
So if having the device that a kind of direction automatically according to rain adjusts umbrella surface direction and position in umbrella
Words, then umbrella can more avoid people by blinding wind drench with rain to.
Recent years, worldwide all entered the intelligent world, and the tool in many life and works has intelligentized
Demand, it is desirable to bring preferably experience and convenience to user.But it is also relatively slow to the intelligent arms of umbrella at present.This hair
Bright is exactly to propose a kind of intelligentized umbrella system so that this daily necessities for generating 1,100 can be brought preferably to people
Rain-proof effect, especially for severe rainy day.
Invention content
The invention mainly solves the technical problem of providing a kind of intelligent umbrellas, can be on severe rainy day, especially
It blows weather, obtains wind speed and direction in real time using wind speed wind direction sensor, then calculate the falling direction of rain, and according to this
Direction controlling umbrella handle rotates, and allows umbrella that can automatically adjust the direction of umbrella handle and umbrella cover according to the landing direction of rain so that umbrella cover pair
Quasi- raindrop falling direction is preferably user's rain cover.
In order to solve the above technical problems, one aspect of the present invention is：A kind of intelligent umbrella is provided, including
Umbrella cover, umbrella frame and umbrella handle, the umbrella cover are arranged by umbrella frame in umbrella handle upper end, further include wind speed wind direction sensor, control
Device and umbrella handle rotary actuator processed, the wind speed wind direction sensor are arranged at the top of umbrella cover, and umbrella handle rotation is held
Row mechanism is arranged on umbrella handle is divided into top umbrella handle and lower part umbrella handle by umbrella handle, and controller setting is held in umbrella handle rotation
The top of row mechanism, the umbrella handle rotary actuator control top umbrella handle one angle of rotation automatically so that top umbrella handle
It is in the same direction that direction is fallen with rain, just and the perpendicular angle of rain descent direction to umbrella cover.
In a preferred embodiment of the present invention, the length of the top umbrella handle is less than the length of lower part umbrella handle.
In a preferred embodiment of the present invention, the wind speed wind direction sensor includes but not limited to ultrasonic wave vortex
Air velocity transducer, propeller air velocity transducer, hot-wire array sensor and hot diaphragm type air velocity transducer.
In a preferred embodiment of the present invention, the intelligent umbrella further includes rain speed position selecting device and signal
Line, the rain speed position selecting device are arranged on the umbrella handle of lower part, the wind speed wind direction sensor, controller, umbrella handle rotation
Turn executing agency with rain speed position selecting device to be connected by signal wire.
In a preferred embodiment of the present invention, the intelligent umbrella can determine rainy day blinding wind according to current wind speed
The falling direction of rain, and determine that direction and the angle of blinding wind rain are blocked in umbrella offset.
In a preferred embodiment of the present invention, the intelligent umbrella can carry out umbrella according to the size and Orientation of blinding wind rain
The mechanism of face direction adjustment.
The beneficial effects of the invention are as follows：The intelligent umbrella of the present invention, can be on severe rainy day, especially windy day
Gas obtains wind speed and direction in real time using wind speed wind direction sensor, then calculates the falling direction of rain, and according to direction control
Umbrella handle rotation processed allows umbrella that can automatically adjust the direction of umbrella handle and umbrella cover according to the landing direction of rain so that umbrella cover is directed at raindrop
Falling direction is preferably user's rain cover.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, wherein：
Fig. 1 is the structural schematic diagram of a preferred embodiment of intelligent umbrella of the invention；
Fig. 2 is the occupation mode and rain-proof effect figure of intelligent umbrella；
Fig. 3 is the system diagram of intelligent umbrella control system；
Fig. 4 is the angle schematic diagram in direction of raining in three dimensions.
Specific implementation mode
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
All other embodiment that technical staff is obtained without making creative work belongs to the model that the present invention protects
It encloses.
As shown in Figure 1, the embodiment of the present invention includes：
A kind of intelligence umbrella, including umbrella cover 1, umbrella frame 2 and umbrella handle 3, the umbrella cover 1 are arranged by umbrella frame 2 in umbrella
3 upper end of handle further includes wind speed wind direction sensor 4, controller 5 and umbrella handle rotary actuator 6, the wind speed wind direction sensor
4 are arranged at the top of umbrella cover 1, and the umbrella handle rotary actuator 6, which is arranged on umbrella handle 3, divides umbrella handle 3 for top umbrella handle
31 and lower part umbrella handle 32, the controller 5 is arranged in the top of umbrella handle rotary actuator 6, and umbrella handle rotation executes
Mechanism 6 controls one angle of rotation automatically of top umbrella handle 31 so that it is in the same direction that top umbrella handle 31 and rain fall direction, to umbrella cover 1
Just and the perpendicular angle of rain descent direction.Wherein, the length of the top umbrella handle 31 is less than the length of lower part umbrella handle 32.
Among the above, the wind speed wind direction sensor includes but not limited to ultrasonic wave vortex air velocity transducer, propeller
Air velocity transducer, hot-wire array sensor and hot diaphragm type air velocity transducer.
Further, the intelligent umbrella further includes rain speed position selecting device 7 and signal wire 8, the rain speed shelves
Position selection device 7 is arranged on lower part umbrella handle 32, the wind speed wind direction sensor 4, controller 5, umbrella handle rotary actuator 6
It is connected by signal wire 8 with rain speed position selecting device 7.
Specifically, wind speed wind direction sensor 4 is located at the top of umbrella, outside umbrella cover 1, can more accurately measure in this way
Wind speed and direction, controller 5 and umbrella handle rotary actuator 6 are located at 3 centre position of umbrella handle, they can be integrated,
It can also be the component being separately implanted in umbrella handle 3, led to by signal wire 8 between wind speed wind direction sensor 4 and controller 5
Letter, signal wire 8 are located inside umbrella handle 3.In addition, previously described：The three grades of rain speed is needed according to umbrella user to drop
The subjective judgement of raininess degree is adjusted, and then this judges that information is transmitted to controller 5 for that, and controller 5 is allowed to calculate angle
, therefore can be arranged at the lower section umbrella handle 3 of umbrella one tool there are three gear selection button（Rain speed position selecting device 7）, example
If "high" indicates heavy rain, " in " indicate that moderate rain, " low " expression light rain allow user to carry out selection operation.According to the choosing of user's gear
It selects, controller 5 can calculate umbrella handle rotation angle according to corresponding preset rain speed.And user can be according to the size of rain
Gear replacement is carried out at any time, to control the variation of umbrella deviation angle.When both direction variableWithAfter all getting, so that it may
To be had rotated come operation upper part umbrella handle 31 by umbrella handle rotary actuator 6.Here umbrella handle rotary actuator 6 may be used
Most conventional angle displacement control device drives the rotation in 31 direction of top umbrella handle to control the slewings such as universal joint.
In the present invention, the intelligent umbrella can determine the falling direction of rainy day blinding wind rain according to current wind speed, and
Determine that umbrella needs the direction deviated and angle, and carries out umbrella cover according to the size and Orientation of blinding wind rain in order to block blinding wind rain
The mechanism of direction adjustment.Its main thought is the direction that umbrella can automatically adjust umbrella handle and umbrella cover according to the direction of blinding wind rain, is made
It is directed at the direction that blinding wind rain is fallen, and reduces the chance that the people that opens an umbrella is caught in the rain to the greatest extent, preferably reaches the function of blocking rain, this
A kind of intelligent umbrella of sample has invented the intelligent umbrella control system based on wind speed wind direction sensor and Universal direction controller.
Firstly the need of recognizing, the formation of blinding wind rain is that have direct relation, wind to be blown toward north with wind direction and wind speed, rain just to
North is floatd, and wind direction southeastern direction is blown, and rain also just southeastward float by direction, and wind is bigger, and raining falls inclined angle and deflect away from vertically
Direction is bigger.There are one relationships so between wind speed and the angle of inclination of blinding wind rain, so that umbrella is sheltered from blinding wind rain, that
The angle of inclination to open an umbrella（Or the angle of inclination of umbrella handle）It will be consistent with the deviation angle of rain, so wind speed and umbrella handle
It there is same relationship between angle of inclination.Description below seeks to always obtain the inclination angle of blinding wind rain by wind speed and wind
Degree, to drive umbrella handle wing drop using this angle so that umbrella cover face rains the direction fallen, i.e., the falling direction of rain with
The direction that umbrella handle maintains like.
Umbrella is typically to be made of umbrella cover, umbrella frame, umbrella handle, handle of umbrella and expanding unit, and wherein expanding unit includes hand
Dynamic and automatic two kinds of forms.Umbrella cover is made of materials such as cloth, plastics or nylon, and shape includes triangle, arc surface shape etc., but
The plane that umbrella cover lowest part is formed and the generally perpendicular relationship of umbrella handle.Umbrella handle rotary actuator 6 designed by the present invention disposes
On umbrella handle 3, which is divide into upper part and lower part umbrella handle 3, then 6 or more umbrella handle rotary actuator
Part include top umbrella handle 31, umbrella cover 1 and umbrella frame 2, umbrella handle rotary actuator 6 is controlled according to the direction of wind and speed
Umbrella top half rotates an angle automatically, this angle is exactly the direction that rain is fallen so that top half umbrella handle and rain are fallen
Lower direction is in the same direction, to umbrella cover just and the perpendicular angle of rain descent direction, reach the function of blocking blinding wind rain, function realization side
Formula is as shown in Figure 2.
In the intelligence umbrella, control system is its core, and system diagram is as shown in figure 3, the control system uses
Simple opened loop control is with regard to fully sufficient.
The system diagram includes wind speed wind direction sensor 4,6 three parts of controller 5 and umbrella handle rotary actuator, arrow table
Show that input/output variable, input and output may include multiple variables, it is also possible to only include a variable, therefore be indicated with block arrow.
The input of whole system is air pressure or wind-force, this depends on 4 type of used wind speed wind direction sensor, at present wind direction
Sensor includes ultrasonic wave vortex air velocity transducer, propeller air velocity transducer, hot-wire array sensor and hot diaphragm type wind
Fast sensor etc., these sensors are by measuring ultrasonic wave time difference, draught head, and the data such as heat transfer measure wind speed and wind
To, their input quantity may be not quite similar, but can all export two variables of wind direction and wind speed, and the present invention does not limit wind speed and wind
The selection and use of force snesor.
After getting wind speed and direction variable, it will be changed into directional information by controller in next step, with control
The adjusting of the umbrella handle and umbrella cover direction of umbrella processed, this step are completed using the algorithm of controller, are believed using wind speed and direction
Breath calculates the important step that angle orientation information is this patent.On calm rainy day, rainwater is vertically fallen to the ground, usually
Rain is descended from about 2000 meters of placement in height, by the coaction of gravity and air drag in dropping process, is declined from acceleration
Become uniform descent, so raindrop are device descending at constant speed when eventually falling in ground, the speed of landing is related with raindrop volume size,
Just related with rainfall intensity, the raindrop volume very little of mao mao's light rain, so sinking speed is slow, and the raindrop volume of shower is larger,
Decrease speed is just than very fast, and heavy rain is similar down-pour, and raindrop also accordingly have the volume of bigger, so decrease speed is also
It is most fast.The speed that rain finally lands is commonly known as the terminal velocity of raindrop whereabouts, has had relevant physical theory to this
[1,2] is described in one problem, and by empirical analysis, the terminal velocity that raindrop fall substantially exists according to the of different sizes of rain
Within the scope of 4m/s-10m/s.This above raindrop falling speed is the vertical drop speed under no wind condition.
And in the case where there is wind, wind-force can give the speed of one horizontal direction of raindrop, then the speed of rainwater landing is
For the sum velocity of vertical speed and horizontal velocity, the direction that raindrop fall also is codetermined by the speed of both direction.Assuming that water
Square to wind speed be v1, the speed of rainwater vertical drop is v2, then the aggregate velocity of final rainwaterAnd offset from perpendicular
AngleRespectively：
（1-1）,
（1-2）,
AngleIt is exactly that intelligent umbrella system through the invention needs to automatically adjust one of direction of umbrella namely umbrella handle
The angle of the offset from perpendicular of top half.During calculating this angle, need to knowv 1 Withv 2 Two speed, water
Square to wind speedv 1 It can be obtained by wind speed wind direction sensor, and the rain of vertical direction is fastv 2 It is less easy acquisition
It arrives, especially the blinding wind rain of rain inherently non-vertical direction, that is it is difficult to accurately calculate the rain speed of vertical direction.
For the present invention, the rain speed of vertical direction can be estimated, three grades is used according to rainy severe degree
It is indicated, 4m/s represents rain speed when light rain, and 7m/s represents rain speed when moderate rain, and 10m/s represents rain speed when raining heavyly, uses
These rain speed are synthesized with current wind speed, are obtained umbrella and are needed the angle deviateed.In the coordinate of x, y, z axis composition
In axis（Fig. 4）, deviation angleIt is the angle with z-axis during raining drop, and the automatic executing agency on umbrella handle will adjust umbrella handle
Offset direction, it is also necessary to know umbrella handle on the x-y plane to which direction deviateAngle exists so also to obtain blinding wind rain
Direction in level, and this direction is exactly just the direction of wind, is used on the x-y planeTo indicate the folder between wind direction and x-axis
Angle.
In conclusion using from wind speed wind direction sensor information and umbrella user's subjectivity deduce rain speed, energy
Enough get the both direction variable about rain falling directionWith, then controller according to the two variables come the rotation to umbrella handle
Turn direction to be operated.
Traditional umbrella is subjected to intelligentized optimization, the necessary tool of life for keeping this common is to use on rainy day
Bring the effect of preferably masking sleet in family.The intelligent umbrella of the invention can adjust rain automatically according to the descent direction of blinding wind rain
The direction of umbrella umbrella cover overcomes traditional umbrella the shortcomings that blinding wind rain situation is rained and cannot be blocked completely.
In conclusion the intelligent umbrella of the present invention, can utilize wind speed on severe rainy day, weather of especially blowing
Wind transducer obtains wind speed and direction in real time, then calculates the falling direction of rain, and control umbrella handle rotation according to the direction,
Allow umbrella that can automatically adjust the direction of umbrella handle and umbrella cover according to the landing direction of rain so that umbrella cover is directed at raindrop falling direction, more
It is user's rain cover well.
Example the above is only the implementation of the present invention is not intended to limit the scope of the invention, every to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (1)
1. a kind of intelligence umbrella, including umbrella cover, umbrella frame and umbrella handle, the umbrella cover are arranged by umbrella frame in umbrella handle upper end,
It is characterized in that, further including wind speed wind direction sensor, controller and umbrella handle rotary actuator, the wind speed wind direction sensor
It is arranged at the top of umbrella cover, the umbrella handle rotary actuator is arranged on umbrella handle is divided into top umbrella handle and lower part by umbrella handle
Umbrella handle, the length of the top umbrella handle are less than the length of lower part umbrella handle, and controller setting rotates execution machine in umbrella handle
The top of structure, the umbrella handle rotary actuator control top umbrella handle one angle of rotation automatically so that top umbrella handle and rain
It is in the same direction to fall direction, further includes rain speed position selecting device and signal wire just and the perpendicular angle of rain descent direction to umbrella cover,
The rain speed position selecting device is arranged on the umbrella handle of lower part, the wind speed wind direction sensor, and controller, umbrella handle rotation are held
Row mechanism is connected with rain speed position selecting device by signal wire, and the intelligent umbrella can determine down according to current wind speed
The falling direction of rainy day blinding wind rain, and determine that direction and the angle of blinding wind rain are blocked in umbrella offset, wherein the wind speed and direction
Sensor include but not limited to ultrasonic wave vortex air velocity transducer, propeller air velocity transducer, hot-wire array sensor and
Hot diaphragm type air velocity transducer；The intelligent umbrella can carry out the machine of umbrella cover direction adjustment according to the size and Orientation of blinding wind rain
System.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610340364.3A CN105901857B (en) | 2016-05-23 | 2016-05-23 | A kind of intelligence umbrella |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610340364.3A CN105901857B (en) | 2016-05-23 | 2016-05-23 | A kind of intelligence umbrella |
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| CN105901857B true CN105901857B (en) | 2018-11-06 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018129678A1 (en) * | 2017-01-11 | 2018-07-19 | 孙丽霞 | Intelligent positioning umbrella |
| CN107411270A (en) * | 2017-05-15 | 2017-12-01 | 肇庆学院 | It is a kind of that there is the intelligent parasols for suspending and following human motion function |
| CN107125865A (en) * | 2017-07-04 | 2017-09-05 | 武汉日新科技股份有限公司 | Automatically adjust photovoltaic umbrella |
| CN109419112B (en) * | 2017-08-28 | 2021-01-26 | 京东方科技集团股份有限公司 | Intelligent umbrella and automatic rain shielding method |
| CN108903164A (en) * | 2018-07-16 | 2018-11-30 | 河海大学文天学院 | The anti-fold School bag capable of carrying umbrella of one kind and its working method |
| CN109463862A (en) * | 2018-11-28 | 2019-03-15 | 星际纵横（厦门）信息科技有限公司 | A kind of outdoor umbrella auto-steering dog-ear device |
| CN110403315B (en) * | 2019-06-19 | 2021-08-31 | 海峡(晋江)伞业科技创新中心有限公司 | Intelligent reversing umbrella |
| CN113335431B (en) * | 2021-06-23 | 2022-05-24 | 宁波小遛共享信息科技有限公司 | Electric bicycle and riding assisting method |
| CN114165003A (en) * | 2021-12-29 | 2022-03-11 | 重庆迈高电梯有限公司 | Universal adjusting elevator steel structure canopy and adjusting method thereof |
| CN114607183A (en) * | 2022-04-22 | 2022-06-10 | 倍道建筑景观设计(上海)有限公司 | Environment-friendly landscape pavilion with self-adaptive rain shielding function |
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| CN204409826U (en) * | 2015-01-12 | 2015-06-24 | 浙江大学 | Electric umbrella |
| CN204838344U (en) * | 2015-06-22 | 2015-12-09 | 上海卓易科技股份有限公司 | Umbrella |
| CN205649066U (en) * | 2016-05-23 | 2016-10-19 | 苏州科技学院 | Intelligent umbrella |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8061374B2 (en) * | 2008-11-28 | 2011-11-22 | Wanda Ying Li | Intelligent outdoor sun shading device |
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| CN204409826U (en) * | 2015-01-12 | 2015-06-24 | 浙江大学 | Electric umbrella |
| CN204838344U (en) * | 2015-06-22 | 2015-12-09 | 上海卓易科技股份有限公司 | Umbrella |
| CN205649066U (en) * | 2016-05-23 | 2016-10-19 | 苏州科技学院 | Intelligent umbrella |
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