CN207544153U - Device for storing liquid and with its unmanned plane - Google Patents
Device for storing liquid and with its unmanned plane Download PDFInfo
- Publication number
- CN207544153U CN207544153U CN201721190016.9U CN201721190016U CN207544153U CN 207544153 U CN207544153 U CN 207544153U CN 201721190016 U CN201721190016 U CN 201721190016U CN 207544153 U CN207544153 U CN 207544153U
- Authority
- CN
- China
- Prior art keywords
- liquid
- communicating pipe
- reserve tank
- storing liquid
- switch
- 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
Landscapes
- Catching Or Destruction (AREA)
Abstract
The utility model discloses a kind of device for storing liquid and there is its unmanned plane, the device for storing liquid includes:Liquid reserve tank;Communicating pipe, the first end of the communicating pipe are stretched into the liquid reserve tank;Pressure sensor, the pressure sensor are located at the second end of the communicating pipe and the second end of the sealing communicating pipe;At least one switch, the switch are connected with the communicating pipe, and the switch is located in the liquid reserve tank.Device for storing liquid according to the present utility model, by using above-mentioned liquid reserve tank, communicating pipe, pressure sensor and at least one switch, the structure of device for storing liquid is simple.Moreover, device for storing liquid can realize the accurate metering to being stored in the liquid in liquid reserve tank.When device for storing liquid is applied to unmanned plane sprinkling liquid pesticidal, it can realize and liquid pesticidal amount is precisely controlled, so as to which excessive pesticide be avoided to enter soil, and then avoid the situation that the hardening soil causes the underproduction, reduce pollution, and reduce cost.
Description
Technical field
The utility model is related to liquid capacity field of measuring techniques, more particularly, to a kind of device for storing liquid and with its nothing
It is man-machine.
Background technology
China's pesticide demand worldwide ranked first, and pesticide utilization rate is only 34% at present, that is to say, that 66%
Pesticide be wasted.Traditional plant protection mode sprays crops using fountain, and excessive agriculture chemical enters soil, not only
The hardening soil is allowed to cause the underproduction, also environment can be caused seriously to pollute.
At present have become a kind of more mature agricultural plant protection mode using unmanned plane progress liquid pesticidal sprinkling to enter
Into agricultural production link.Specifically, using unmanned plane carry out liquid pesticidal sprinkling have it is intelligent, safe efficient, accurate,
Uniformly, it is therefore, a kind of using unmanned plane sprinkling as the novel precision dispenser of representative the advantages of low cost, low stain, low labor intensity
Mode is just responsible for the important task of the traditional plant protection mode of substitution in the farmland overhead of various regions.With technological progress, unmanned plane sprinkling
Various advantages are able to strengthen amplification, and machinery operation substitutes the work of people, trend of the times.Liquid agriculture is sprayed using unmanned plane
Medicine, pesticide concentration is higher, so as to which precisely metering pesticide flow is just particularly important during accurate sprinkling.
Utility model content
The utility model is intended at least solve one of technical problem in the prior art.For this purpose, the utility model carries
Go out a kind of device for storing liquid, the structure of the device for storing liquid is simple.
The utility model also proposes a kind of unmanned plane with above-mentioned device for storing liquid.
According to the device for storing liquid of the utility model first aspect, including:Liquid reserve tank;Communicating pipe, the first of the communicating pipe
End is stretched into the liquid reserve tank;Pressure sensor, the pressure sensor are located at described in the second end of the communicating pipe and sealing
The second end of communicating pipe;At least one switch, the switch are connected with the communicating pipe, and the switch is located at
In the liquid reserve tank.
Device for storing liquid according to the present utility model, by using above-mentioned liquid reserve tank, communicating pipe, pressure sensor and extremely
A few switch, the structure of device for storing liquid are simple.Moreover, device for storing liquid can realize the liquid to being stored in liquid reserve tank
Accurate metering.When device for storing liquid is applied to unmanned plane sprinkling liquid pesticidal, the accurate control to liquid pesticidal amount can be realized
System, so as to which excessive pesticide be avoided to enter soil, and then avoids the situation that the hardening soil causes the underproduction, reduces pollution, and
Reduce cost.
Some embodiments according to the present utility model, the opening of the first end of the communicating pipe is relative to the liquid storage
The bottom wall of case is obliquely installed;Or it is provided at least one through-hole on the end tube wall of the first end of the communicating pipe.
Some embodiments according to the present utility model, end and the liquid reserve tank of the first end of the communicating pipe
Bottom wall is arranged at intervals.
Some embodiments according to the present utility model, the switch are two, and two switches are between the upper and lower
Every setting.
Some embodiments according to the present utility model, the pressure sensor are static pressure transducer.
Some embodiments according to the present utility model, the liquid reserve tank are equipped with power supply module.
Some embodiments according to the present utility model, the power supply module are wireless power supply module.
Some embodiments according to the present utility model, the switch and the junction of the communicating pipe are located at the company
Siphunculus stretches into 1/3rd in the liquid reserve tank at a quarter, and the switch is adjacent to described in the communicating pipe
First end.
Some embodiments according to the present utility model, the liquid reserve tank are cylindrical structure or rectangular parallelepiped structure.
According to the unmanned plane of the utility model second aspect, including:Unmanned plane ontology;Device for storing liquid, the device for storing liquid
For the device for storing liquid according to the above-mentioned first aspect of the utility model, the device for storing liquid is located on the unmanned plane ontology.
Some embodiments according to the present utility model, the device for storing liquid and the unmanned plane ontology wireless telecommunications.
The additional aspect and advantage of the utility model will be set forth in part in the description, partly will be from following description
In become apparent or recognized by the practice of the utility model.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the utility model will in the description from combination accompanying drawings below to embodiment
Become apparent and be readily appreciated that, wherein:
Fig. 1 is the schematic diagram according to the device for storing liquid of the utility model embodiment;
Fig. 2 is the system block diagram according to the unmanned plane with device for storing liquid of the utility model embodiment.
Reference numeral:
100:Device for storing liquid;
1:Liquid reserve tank;2:Communicating pipe;3:Pressure sensor;
4:Switch;5:Power supply module;
6:Control system;7:Communication interface;
201:Unmanned plane ontology.
Specific embodiment
The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and it is not intended that the utility model
Limitation.
In the description of the present invention, it is to be appreciated that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " suitable
The orientation or position relationship of the instructions such as hour hands ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " are based on orientation shown in the drawings
Or position relationship, be for only for ease of description the utility model and simplify description rather than instruction or imply signified device or
Element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that limit to the utility model
System.In addition, define " first ", one or more this feature can be expressed or be implicitly included to the feature of " second ".
In the description of the present invention, unless otherwise indicated, " multiple " are meant that two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integrally
Connection;Can be mechanical connection or electrical connection;It can be directly connected, can also be indirectly connected by intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, can above-mentioned art be understood with concrete condition
Concrete meaning of the language in the utility model.
Below with reference to Fig. 1 and Fig. 2 descriptions according to the device for storing liquid 100 of the utility model embodiment.
As depicted in figs. 1 and 2, according to the device for storing liquid 100 of the utility model first aspect embodiment, including liquid reserve tank 1,
Communicating pipe 2, pressure sensor 3 and at least one switch 4.
Specifically, liquid reserve tank 1 also provides each function knot as structural member simultaneously both for storing liquid such as liquid
Needed for the installation of structure such as communicating pipe 2, pressure sensor 3, protection.The first end (for example, lower end in Fig. 1) of communicating pipe 2 is stretched
Enter in liquid reserve tank 1.Pressure sensor 3 is located at the second end (for example, upper end in Fig. 1) of communicating pipe 2, and pressure sensor 3 is close
Seal the second end of communicating pipe 2.Switch 4 is connected with communicating pipe 2, and switch 4 is located in liquid reserve tank 1.
Optionally, pressure sensor 3 is static pressure transducer, but not limited to this.
Wherein, the operation principle of switch 4 can be that one or more do is equipped in closed non-magnetic pipe
Then the non-magnetic pipe is passed through the one or more hollow and internal floating balls for having annular magnet by reed pipe, liquid in liquid reserve tank 1
Rise or fall floating ball will be driven to move up and down together, be attracted or disconnect so as to generate tongue tube in the non-magnetic pipe
Action, so as to export a switching signal.For example, when the position lower section where the liquid level in liquid reserve tank 1 is in l, float
Switch 4 output signals " 0 ";When above the position where liquid level is in above-mentioned l, 4 output signal of switch " 1 ".The float
When switch 4 is exactly in l positions for demarcating liquid level, communicating pipe 2 row into closed cavity gas pressure.In assembling process
In, the position where above-mentioned l needs accurate measure.
As a result, according to the device for storing liquid of the utility model embodiment 100, by using above-mentioned liquid reserve tank 1, communicating pipe 2,
Pressure sensor 3 and at least one switch 4, the structure of device for storing liquid 100 are simple.Moreover, device for storing liquid 100 can be real
Now to being stored in the accurate metering of the liquid in liquid reserve tank 1.Liquid pesticidal is sprayed when device for storing liquid 100 is applied to unmanned plane 200
When, it can realize and liquid pesticidal amount is precisely controlled, so as to which excessive pesticide be avoided to enter soil, and then avoid soil floor
Knot causes the situation of the underproduction, reduces pollution, and reduce cost.
Some specific embodiments according to the present utility model, the opening of the above-mentioned first end of communicating pipe 2 is relative to liquid reserve tank 1
Bottom wall be obliquely installed;Alternatively, it is provided at least one through-hole on the end tube wall of the above-mentioned first end of communicating pipe 2.At this time may be used
It is contacted with stretching to the above-mentioned first end of communicating pipe 2 with the bottom wall of liquid reserve tank 1.As a result, due to the above-mentioned first end of communicating pipe 2
Opening can be obliquely installed, the opening of the above-mentioned first end of communicating pipe 2 is above-mentioned for angular cut or in communicating pipe 2 at this time
Through-hole is set on the end tube wall of first end, the accurate metering to being stored in the liquid in liquid reserve tank 1 can be effectively ensured.
Specifically, such as static pressure transducer of pressure sensor 3 is used to acquire in such as static pressure transducer of pressure sensor 3
The pressure of confining gas in the semi-enclosed cavity formed with communicating pipe 2.Wherein, for example, the first end of communicating pipe 2 is with above-mentioned
Opening or through-hole, and the second end of the communicating pipe 2 such as static pressure transducer of pressure sensor 3 of combining closely is air tight to ensure,
Thus above-mentioned semi-enclosed cavity is formed.It, can will be in communicating pipe 2 after the liquid in liquid reserve tank 1 did not had the first end of communicating pipe 2
The gas confinement in portion is in such as static pressure transducer of pressure sensor 3 and communicating pipe 2.With the rising of liquid level, in liquid reserve tank 1
Partially liq can be pressed into from the first end of communicating pipe 2 in communicating pipe 2, and the gas in communicating pipe 2 is compressed.In pressure sensor
In the semi-enclosed cavity that 3 such as static pressure transducers are formed with communicating pipe 2, it is believed that gas pressure and liquid level therein
H is directly proportional, current closed cavity pressure P can be known by reading such as static pressure transducer of pressure sensor 3, according to formula:
P=ρ gh formula are 1.
Wherein, ρ is fluid density, and g is local gravitational acceleration.
Liquid level h can be gone out with inverse
It is as follows according to the specific work process of the device for storing liquid of the utility model embodiment 100 as a result,:
1st, preliminary calibration
Liquid reserve tank 1 is emptied, the current pressure of such as static pressure transducer of pressure sensor 3 is denoted as P0, by 1 water of liquid reserve tank
Current pressure is denoted as P by placing flat, injection liquid to 4 lucky output signal " 1 " of switch1, by formula 1., just like ShiShimonoseki
It is formula:
Δ P=P1-P0=ρ gl, can obtain:
Wherein in assembling process, precisely it is known that ρ .g can regard known constant as, calibration finishes l.
2nd, liquid, the pressure of such as static pressure transducer of dynamic detection pressure sensor 3 are persistently injected
With the injection of liquid, liquid level is persistently increased to h, at this time by the pressure of such as static pressure transducer of pressure sensor 3
It is denoted as P2, 3. bring formula into formula 2., there is following relational expression:
3rd, liquid storage volume is calculated
When liquid reserve tank 1 is cylindrical structure, the floor space S of liquid reserve tank 1 can be measured, volume V=Sh, by formula 4.
Substitution can obtain:
It is derived by the more than course of work as can be seen that as long as continuous dynamic measurement pressure sensor 3 such as static pressure senses
The pressure P of device2, you can 5. the position more than l positions dynamically obtains liquid storage volume by above-mentioned formula.
Wherein, liquid reserve tank 1 can also be rectangular parallelepiped structure etc..It is understood that the concrete shape of liquid reserve tank 1 can root
It is specifically set according to actual requirement, preferably to meet actual requirement.
Certainly, the utility model is without being limited thereto, other specific embodiments according to the present utility model, communicating pipe 2 it is upper
(not shown) can also be arranged at intervals with the bottom wall of liquid reserve tank 1 by stating the end of first end.The above-mentioned first end of communicating pipe 2 at this time
End can be up and down spaced apart with the bottom wall of liquid reserve tank 1, to ensure the connectivity of communicating pipe 2.
Switch 4 can be two, and two switches are arranged at intervals about 4, with to the fluid density in liquid reserve tank 1
Accurate calibration is carried out, so as to fulfill the accurate metering to being stored in the liquid in liquid reserve tank 1.
Specific works mistake during as a result, according to the device for storing liquid of the utility model embodiment 100 using two switches 4
Journey is as follows:
1st, preliminary calibration
Liquid reserve tank 1 is horizontal positioned, liquid to the switch 4 for being located at downside is injected into liquid reserve tank 1 and exports letter just
Number " 1 ", and current pressure is denoted as Pa, continue to inject liquid into liquid reserve tank 1 to the output just of switch 4 for being located at upside
Signal " 1 ", and current pressure is denoted as Pb, by formula 1., there is following relational expression:
Δ P=Pb-Pa=ρ g (lb-la), it can obtain:
Wherein in assembling process, precisely it is known that ρ .g can regard known constant as, calibration finishes l.
2nd, liquid, the pressure of such as static pressure transducer of dynamic detection pressure sensor 3 are persistently injected
With the injection of liquid, liquid level is persistently increased to h, at this time by the pressure of such as static pressure transducer of pressure sensor 3
It is denoted as Pc, 6. bring formula into formula 2., there is following relational expression:
3rd, liquid storage volume is calculated
When liquid reserve tank 1 is cylindrical structure, the floor space S of liquid reserve tank 1 can be measured, volume V=Sh, by formula 7.
Substitution can obtain:
It is derived by the more than course of work as can be seen that as long as continuous dynamic measurement pressure sensor 3 such as static pressure senses
The pressure P of devicec, you can 8. the position more than l positions dynamically obtains liquid storage volume by above-mentioned formula.
Some embodiments according to the present utility model, as depicted in figs. 1 and 2, liquid reserve tank 1 are equipped with power supply module 5, power supply
Module 5 is used to provide electric power for entire device for storing liquid 100, for example, power supply module 5 can be the control system 6 of device for storing liquid 100
Such as microcontroller micro control system 6, pressure sensor 3 provide electric power such as static pressure transducer.Wherein, control system 6 is for example
Microcontroller micro control system can be communicated by communication interface 7 and unmanned plane 200.
Optionally, power supply module 5 can be wireless power supply module.As a result, for example, electromagnetism may be used in wireless power supply module
Induction type wireless power transmits energy with magnetic field between power supply module 5 and power device, does not run wires between the two, because
This power supply module 5 and power device can accomplish that no conductive junction point is exposed, enhance waterproof, the anticorrosive property of device for storing liquid
Energy.
Some embodiments according to the present utility model, switch 4 and the junction of communicating pipe 2 are located at stretching for communicating pipe 2
Enter 1/3rd in liquid reserve tank 1 at a quarter, switch 4 is adjacent to the above-mentioned first end of communicating pipe 2.For example, float
Switch 4 may be mounted at the position on the lower side of communicating pipe 1/2nd three, to facilitate the calibration of fluid density in liquid reserve tank 1.
According to the unmanned plane of the utility model second aspect embodiment, including unmanned plane ontology 201 and device for storing liquid 100.
Wherein, device for storing liquid is the device for storing liquid 100 according to the above-mentioned first aspect of the utility model, and device for storing liquid 100 is located at unmanned plane
On ontology 201.
Optionally, device for storing liquid 100 and 201 wireless telecommunications of unmanned plane ontology.As a result, by using wirelessly with nothing
Man-machine contact communication is connected without conducting wire so that device for storing liquid 100 moves more convenient, while nothing putting, be laid out, carries
Exposed conducting contact enhances waterproof, the Corrosion Protection of unmanned plane.
According to the unmanned plane of the utility model embodiment, by using above-mentioned device for storing liquid 100, can precisely spray
Precisely metering pesticide flow is realized in the process, there is higher safety, good accuracy and repeatability, while have both dimension
Shield is convenient and operation is friendly.
According to other compositions of the unmanned plane of the utility model embodiment and operate for those of ordinary skill in the art
For be all known, be not detailed herein.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means to combine specific features, the knot that the embodiment or example describe
Structure, material or feature are contained at least one embodiment or example of the utility model.In the present specification, to above-mentioned art
The schematic representation of language may not refer to the same embodiment or example.Moreover, description specific features, structure, material or
Person's feature can in an appropriate manner combine in any one or more embodiments or example.
While there has been shown and described that the embodiment of the utility model, it will be understood by those skilled in the art that:
In the case of the principle and objective for not departing from the utility model can these embodiments be carried out with a variety of variations, modification, replaced
And modification, the scope of the utility model are limited by claim and its equivalent.
Claims (11)
1. a kind of device for storing liquid, which is characterized in that including:
Liquid reserve tank;
Communicating pipe, the first end of the communicating pipe are stretched into the liquid reserve tank;
Pressure sensor, the pressure sensor are located at the second end of the communicating pipe and the second end of the sealing communicating pipe;
At least one switch, the switch are connected with the communicating pipe, and the switch is located at the liquid reserve tank
It is interior.
2. device for storing liquid according to claim 1, which is characterized in that the opening of the first end of the communicating pipe is opposite
It is obliquely installed in the bottom wall of the liquid reserve tank;Or
At least one through-hole is provided on the end tube wall of the first end of the communicating pipe.
3. device for storing liquid according to claim 1, which is characterized in that the end of the first end of the communicating pipe and institute
The bottom wall for stating liquid reserve tank is arranged at intervals.
4. device for storing liquid according to claim 1, which is characterized in that the switch is two, two floats
Switch is arranged at intervals up and down.
5. device for storing liquid according to claim 1, which is characterized in that the pressure sensor is static pressure transducer.
6. device for storing liquid according to claim 1, which is characterized in that the liquid reserve tank is equipped with power supply module.
7. device for storing liquid according to claim 6, which is characterized in that the power supply module is wireless power supply module.
8. device for storing liquid according to claim 1, which is characterized in that the switch and the junction of the communicating pipe
1/3rd in the liquid reserve tank are stretched at a quarter positioned at the communicating pipe, and the switch is adjacent to the company
The first end of siphunculus.
9. device for storing liquid according to claim 1, which is characterized in that the liquid reserve tank is cylindrical structure or cuboid knot
Structure.
10. a kind of unmanned plane, which is characterized in that including:
Unmanned plane ontology;
Device for storing liquid, the device for storing liquid are device for storing liquid according to any one of claim 1-9, the device for storing liquid
It is located on the unmanned plane ontology.
11. unmanned plane according to claim 10, which is characterized in that the device for storing liquid and the unmanned plane ontology are wireless
Communication.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201721190016.9U CN207544153U (en) | 2017-09-14 | 2017-09-14 | Device for storing liquid and with its unmanned plane |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201721190016.9U CN207544153U (en) | 2017-09-14 | 2017-09-14 | Device for storing liquid and with its unmanned plane |
Publications (1)
Publication Number | Publication Date |
---|---|
CN207544153U true CN207544153U (en) | 2018-06-29 |
Family
ID=62676430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201721190016.9U Active CN207544153U (en) | 2017-09-14 | 2017-09-14 | Device for storing liquid and with its unmanned plane |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN207544153U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109060074A (en) * | 2018-08-10 | 2018-12-21 | 广州极飞科技有限公司 | Device for storing liquid, by storage solution balance detection method, liquid storage detection device |
-
2017
- 2017-09-14 CN CN201721190016.9U patent/CN207544153U/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109060074A (en) * | 2018-08-10 | 2018-12-21 | 广州极飞科技有限公司 | Device for storing liquid, by storage solution balance detection method, liquid storage detection device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN201903792U (en) | Liquid level control system | |
CN207474572U (en) | A kind of automatic liquid compensator of lead acid battery | |
CN202720176U (en) | Salt-spray corrosion experiment box | |
CN206638280U (en) | A kind of instrument for observing and controlling water-carrying capacity | |
CN207544153U (en) | Device for storing liquid and with its unmanned plane | |
CN208705321U (en) | Soil pollution environmental detection set | |
CN206804686U (en) | A kind of river flow velocity metering device of hydraulic engineering | |
CN202305524U (en) | Device for monitoring soil erosion and water loss of slope surface | |
CN201589646U (en) | Water level and temperature induction meter | |
CN201229195Y (en) | Water level sensor | |
CN205580571U (en) | High vacuum insulation keeps warm and presss from both sides cover level gauge | |
CN205449979U (en) | Survey depressimeter from moisturizing formula electricity | |
CN208296932U (en) | A kind of float-type water quantity for irrigating agricultural field recorder | |
CN105831051B (en) | Spraying machine electronic level display system | |
CN207528260U (en) | A kind of integrated device for monitoring nozzle and blocking | |
CN208795644U (en) | A kind of cyanobacteria enclosure device | |
CN209326737U (en) | A kind of level measuring circuit | |
CN207590518U (en) | A kind of liquid level detection device | |
CN208679178U (en) | A kind of oil exploration sample storing unit | |
CN207163525U (en) | The fertilising system for measuring quantity of water-fertilizer integral device | |
CN208968815U (en) | Atomizer flow measurement device | |
CN207007284U (en) | A kind of floating-ball level switch calibration equipment | |
CN205884505U (en) | Novel integrative case of agricultural water medicine oil | |
CN204881782U (en) | Subminiature low -density floating ball liquid level switch | |
CN209404658U (en) | A kind of Sika Deer Farming breeding house cleaning device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant | ||
CP03 | Change of name, title or address | ||
CP03 | Change of name, title or address |
Address after: 510000 Block C, 115 Gaopu Road, Tianhe District, Guangzhou City, Guangdong Province Patentee after: Guangzhou Jifei Technology Co.,Ltd. Address before: 510000, Guangdong, Guangzhou, Gaotang Tianhe District Software Park Road, No. 1, 3A01 Patentee before: Guangzhou Xaircraft Technology Co.,Ltd. |