CN107681271A - Communication base station aerial signal vertical dip angle adjustment intelligent actuator - Google Patents
Communication base station aerial signal vertical dip angle adjustment intelligent actuator Download PDFInfo
- Publication number
- CN107681271A CN107681271A CN201710745997.7A CN201710745997A CN107681271A CN 107681271 A CN107681271 A CN 107681271A CN 201710745997 A CN201710745997 A CN 201710745997A CN 107681271 A CN107681271 A CN 107681271A
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- China
- Prior art keywords
- output voltage
- analog
- digital converter
- angle value
- base station
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/005—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using remotely controlled antenna positioning or scanning
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/32—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by mechanical means
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The present invention provides communication base station aerial signal vertical dip angle adjustment intelligent actuator, is related to the communications field, including：Adjustment circuit module, the adjustment circuit module include：First fixed end is connected with the power supply of the analog-digital converter, the straight line variable potentiometer of the second fixed end ground connection, and the adjustment circuit module is used to determine relation between antenna for base station vertical dip angle angle value and analog-digital converter output voltage；The transmission device being respectively connected with the moved end of phase shifter and the straight line variable potentiometer；It is connected with the transmission device, receive default angle value, according to the antenna for base station vertical dip angle angle value output voltage corresponding with the default angle value is calculated with relation between analog-digital converter output voltage, when the output voltage of the analog-digital converter is not equal to the output voltage corresponding with the default angle value, the transmission is controlled to fill；The present invention realizes the adjustment of high-precision antenna for base station vertical dip angle.
Description
Technical field
The present invention relates to the communications field, and in particular to communication base station aerial signal vertical dip angle adjustment intelligent actuator.
Background technology
The antenna of mobile communication base station usually requires to be inclined relative to horizontal certain angle, can pass through remote control
The adjustment to antennas orthogonal inclination angle is realized, existing method of adjustment is turned using the vertical dip angle that adjustment circuit module determines and A/D
The voltage relationship of parallel operation is carried out, i.e.,：Adjustment unit obtain user setting vertical dip angle value after, according to relational expression θ=W ×
((1024×R2)/D-(R2+A1))A2-A1,]]>Calculate the electricity of A/D converter corresponding to the vertical dip angle value of user's setting
D, then the moved end by mobile variable potentiometer are pressed, changes the resistance value of access, so as to which the voltage of A/D converter is adjusted into D,
Realize the purpose at adjustment antennas orthogonal inclination angle.
In above-mentioned relation formula, θ is the angle of declination of antenna for base station, and W is maximum angle excursion, and A1 is that variable potentiometer is low
Spacing resistance, A2 are the high spacing resistance of variable potentiometer, and R2 is the resistance for the resistance being connected with variable potentiometer, it is seen then that
The voltage D of vertical dip angle and A/D converter relation is determined by the resistance of variable potentiometer.
In practical application, the precision of variable potentiometer typically has ± 20% error, so, existing Downtilt
Method of adjustment has larger error, it is impossible to which realization is accurately adjusted to vertical dip angle.
The content of the invention
In view of the shortcomings of the prior art, adjust the invention provides communication base station aerial signal vertical dip angle and performed with intelligence
Device.
The present invention is achieved by the following technical programs：The adjustment of communication base station aerial signal vertical dip angle is performed with intelligence
Device, including：Adjustment circuit module, the adjustment circuit module include：First fixed end is connected with the power supply of the analog-digital converter,
The straight line variable potentiometer of second fixed end ground connection, the adjustment circuit module are used to determine antenna for base station vertical dip angle angle value and mould
Relation between number converter output voltage；
The transmission device being respectively connected with the moved end of phase shifter and the straight line variable potentiometer；
Be connected with the transmission device, receive default angle value, according to the antenna for base station vertical dip angle angle value with
Relation calculates output voltage corresponding with the default angle value between analog-digital converter output voltage, when the analog-digital converter
Output voltage not equal to the output voltage corresponding with the default angle value when, control the transmission device drive institute
State moved end and the phase shifter movement of straight line variable potentiometer, until the output voltage of the analog-digital converter be equal to it is described with
Output voltage corresponding to the default angle value, to adjust the processor of the vertical dip angle of antenna for base station.
Preferably, the adjustment circuit module also includes：
One end is connected with the moved end of the straight line variable potentiometer, one end is connected with the input of the analog-digital converter
Resistance；
One end is connected with the resistance, the electric capacity of one end ground connection；
One end is connected with the power supply of the analog-digital converter, the diode of one end ground connection.
Preferably, the transmission device includes：
It is being connected with the processor, when the analog-digital converter output voltage not equal to described with the default angle
Corresponding to angle value during output voltage, the motor being turned on and off is controlled by the processor；
By the motor-driven gear train；
The screw shaft being socketed in the driven gear of the gear train；
With the screw rod axis connection, the screw rod of the setting phase shifter；
The graduated scale being connected with the screw rod；
The pull bar being connected respectively with the moved end of the graduated scale and the straight line variable potentiometer.
Preferably, the processor and the adjustment circuit module are integrally disposed for integrated control adjustment unit.
Preferably, the integrated control adjustment unit also includes：
Package casing and the jointing being connected with the transmission device.
Preferably, for the device described in claim 1, including：
Receive default angle value；
According to relation and default antenna angle between the antenna for base station vertical dip angle angle value and analog-digital converter output voltage
Scope and phase shifter displacement range are spent, calculates output voltage corresponding with the default angle value；
It is described corresponding with the default angle value to judge whether the current output voltage of the analog-digital converter is equal to
Output voltage；
If it is not, then the transmission device is controlled to drive the moved end of the straight line variable potentiometer and the phase shifter to move
It is dynamic, until the output voltage of the analog-digital converter is equal to the output voltage corresponding with the default angle value, with tune
The processor of the vertical dip angle of integral basis station antenna.
The invention provides communication base station aerial signal vertical dip angle adjustment intelligent actuator, in adjustment circuit module
First fixed end of straight line variable potentiometer is connected with the power supply of the analog-digital converter, and the second fixed end is directly grounded, thus, described
Relation and variable linear electricity between antenna for base station vertical dip angle angle value and analog-digital converter output voltage that adjustment circuit module determines
The resistance of position device is without the contact of certainty, and therefore, the adjustment of vertical dip angle is influenceed significantly by the resistance of variable linear potentiometer
Reduce, so as to avoid the error of adjustment angle that the resistance error because of straight line variable potentiometer brings, can realize high-precision
The adjustment of the antenna for base station vertical dip angle of degree.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of transmission device disclosed in the embodiment of the present invention；
Fig. 2 is the structural representation that control adjustment unit is integrated disclosed in the embodiment of the present invention；
Fig. 3 is structural representation disclosed in the embodiment of the present invention；
Fig. 4 is the circuit diagram of adjustment circuit module disclosed in the embodiment of the present invention；
Fig. 5 is flow chart disclosed in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
, it is necessary to explanation in description of the invention, the orientation of instruction such as term " vertical ", " on ", " under ", " level " or
Person's position relationship is based on orientation shown in the drawings or position relationship, is for only for ease of and describes this practicality and simplify to describe,
Rather than instruction either implies that signified device or element must have specific orientation, with specific azimuth configuration and behaviour
Make, therefore be not considered as limiting the invention.In addition, " first ", " second ", " the 3rd ", " the 4th " are only used for describing mesh
, and it is not intended that instruction or hint relative importance.
In description of the invention, it is also necessary to explanation, unless otherwise clear and definite regulation and limitation, term " setting ", " peace
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection, can be mechanical connection or electrical connection, can be directly connected to or be connected by intermediary, can
To be the connection of two element internals.For the ordinary skill in the art, can understand as the case may be above-mentioned
The concrete meaning of term in the present invention.
The embodiment of the invention discloses a kind of communication base station aerial signal vertical dip angle adjustment intelligent actuator, such as Fig. 3
It is shown, including：
Adjustment circuit module 101, transmission device 102, processor 103 and phase shifter 104, wherein transmission device 102 are with adjusting
Straight line variable potentiometer in whole circuit module 101 is connected, and is connected with phase shifter 104, processor 103 and the phase of transmission device 102
Even.
First fixed end of the straight line variable potentiometer in the adjustment circuit module and the power supply phase of the analog-digital converter
Even, the second fixed end ground connection, in order to realize the antijamming capability of circuit, in practical application, can also include in adjustment circuit module：
Resistance, electric capacity and diode, specific connected mode is as shown in figure 4, wherein, a fixed end of straight line variable potentiometer 201 connects
The power supply Vref of analog-digital converter (not shown), another fixed end ground connection, i.e. the electricity at straight line variable potentiometer both ends
Pressure is identical with the reference voltage of analog-digital converter；Straight line variable potentiometer passes through resistance 202 and the input of analog-digital converter
ANA0 is connected；Diode 203,204 is connected between power supply and ground, i.e. the negative pole connection modulus of diode 203 turns
The power supply Verf of parallel operation, the negative pole of cathode connecting diode 204, the plus earth of diode 204, the one end of electric capacity 205 with
Resistance 202 is connected, one end ground connection.
If the voltage exported by analog-digital converter is D, during straight line variable potentiometer lower bound position, the output of analog-digital converter
It is worth for D1, when straight line variable potentiometer is high spacing, the output valve of analog-digital converter is D2, and the excursion of vertical dip angle value is W,
In the case of the linearity of straight line variable potentiometer is accurate, the vertical dip angle and mould determined by above-mentioned adjustment circuit module
Number converter output voltage be D between relational expression be：
θ=D-A1A2-A1 × W]]>
It can be seen that the voltage of vertical dip angle and the analog-digital converter output determined by above-mentioned adjustment circuit module is between D
Relation is unrelated with the resistance of straight line variable potentiometer, thus, when being adjusted using above-mentioned adjustment circuit module to vertical dip angle
The error of angle adjustment will not be caused because of the error of the resistance of straight line variable potentiometer.Meanwhile compared with resistance error, directly
The linearity of line variable potentiometer more easily controls, usual error very little, so, it is easy to using above-mentioned adjustment circuit module
Realize the accurate adjustment to antenna for base station vertical dip angle.
In the present embodiment, the excursion of antennas orthogonal degree of tilt and the displacement model of phase shifter are previously written within a processor
Enclose, after processor receives the vertical dip angle angle value of user's setting, according to the above-mentioned vertical dip angle degree determined by adjustment circuit module
Relational expression and the excursion of the antennas orthogonal degree of tilt and the position of phase shifter between value and analog-digital converter output voltage
Scope is moved, the output voltage of analog-digital converter corresponding with the vertical dip angle degree of user's setting is calculated, if analog-digital converter
Current output voltage is equal to the output voltage values calculated, then keeps current state, and otherwise, processor control transmission device enters
Row movement, transmission device drive moved end and the phase shifter movement of straight line variable potentiometer, now, the resistance in adjustment circuit module
Change, the output voltage of analog-digital converter changes with the change of resistance, when current output voltage of analog-digital converter etc.
When the output voltage values calculated, processor control transmission device stops movement, then phase shifter stops movement, now to phase shift
The adjustment of device is completed, then the adjustment to vertical dip angle is completed.
It should be noted that the excursion of the antennas orthogonal degree of tilt pre-entered and the displacement range of phase shifter can be with
Set according to the actual requirements by user, the present embodiment does not limit.
Communication base station aerial signal vertical dip angle adjustment intelligent actuator described in the present embodiment, passes through adjustment circuit mould
Corresponding relation in block between resistance value and analog-digital converter output voltage, mobile phase shift is used as using the output voltage of analog-digital converter
The yardstick of device, the vertical dip angle value and the resistance value of variable potentiometer determined due to adjustment circuit module is without necessarily relation, institute
So that reduce the adjustment process of vertical dip angle is influenceed by the resistance error of variable potentiometer, is realized vertical to antenna for base station
The accurate adjustment at inclination angle.
Further, the transmission device described in the present embodiment is as shown in figure 1, can specifically include：
It is being connected with the processor, when the analog-digital converter output voltage not equal to described with the default angle
Corresponding to angle value during output voltage, the motor 301 being turned on and off is controlled by the processor；
By the motor-driven gear train 302, wherein, gear train includes driving gear and driven gear, driving gear
It is socketed on motor, can be driven and be rotated by motor, driven gear is socketed on screw shaft 303 by fixed seat 307, can
To drive screw shaft to rotate with it；
With the screw rod 304 of the screw rod axis connection, the setting phase shifter (not shown), screw rod can drive phase shifter to produce
Raw displacement；
The graduated scale 305 being connected with the screw rod；
The pull bar 306 (not marked in Fig. 1) being connected respectively with the moved end of the graduated scale and the straight line variable potentiometer.
Further, in the present embodiment, adjustment circuit module can be integrated on one piece of circuit board with processing, as integrated
Control adjustment unit to use, it is preferable that integrated control adjustment unit can be arranged to the module that can be extracted, extract part without
Motor and feedback device, it is easily installed and dismantles, while extraction-type structure can be with the inside of flush antenna device so that base station day
Line outward appearance is clean and tidy.
Integrated control adjustment unit concrete structure is as shown in Figure 2 (part does not mark)：
Package casing 401, for adjustment circuit module and processor to be encapsulated wherein；
Connector 402, for being connected with the transmission device；
Straight line variable potentiometer 403, and the pull bar 404 being connected with straight line variable potentiometer and graduated scale 305.
It is specifically described below for adjustment processes of the Fig. 1 and Fig. 2 to base station vertical dip angle：
Processor receives user's vertical dip angle value set in advance, and calculates mould corresponding with the vertical dip angle value
Number converter output voltage, when the current output voltage values of analog-digital converter are not equal to the value calculated, processor control electricity
Machine 301 is opened, and motor-driven gear group 302 rotates, and screw shaft 303 together rotates with gear train, drives screw rod 304 to move, if
Be placed in phase shifter (not shown) on screw rod and produce displacement, the graduated scale 305 being connected with screw rod follow screw rod together with move, and
The pull bar 404 being connected with the moved end of straight line variable potentiometer 403 is driven to move, pull bar 404 drives straight line variable potentiometer 403
Moved end movement, cause the change in resistance of integrated control adjustment unit, change therewith so as to the output voltage of analog-digital converter, when
When processor judges the output voltage of analog-digital converter with equal to the value calculated, controlled motor 301 is closed, so as to entirely adjust
It has suffered journey completion.
It should be noted that if processor judges that the current output voltage of analog-digital converter is less than the value that calculates,
Then controlled motor main story, conversely, then controlled motor inverts.
Corresponding with said apparatus embodiment, the embodiment of the invention also discloses a kind of base station applied to said apparatus
Antennas orthogonal inclination angle regulation method, as shown in figure 5, including：
S501：Receive default angle value；
S502：According to relation and default day between the antenna for base station vertical dip angle angle value and analog-digital converter output voltage
Line angular range and phase shifter displacement range, calculate output voltage corresponding with the default angle value；
S503：Judge whether the current output voltage of the analog-digital converter is equal to the described and default angle value pair
The output voltage answered；
S504：If it is not, then the transmission device is controlled to drive the moved end of the straight line variable potentiometer and the phase shift
Device moves, until the output voltage of the analog-digital converter is equal to the output voltage corresponding with the default angle value,
To adjust the processor of the vertical dip angle of antenna for base station.
Method of adjustment described in the present embodiment so that adjustment result is influenceed to subtract significantly by variable potentiometer resistance error
It is small, so as to realize the accurate adjustment to base station vertical dip angle.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be with it is other
The difference of embodiment, between each embodiment same or similar part mutually referring to.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these modification or
Replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (6)
1. communication base station aerial signal vertical dip angle adjustment intelligent actuator, it is characterised in that including：Adjustment circuit module,
The adjustment circuit module includes：The straight line that first fixed end is connected with the power supply of the analog-digital converter, the second fixed end is grounded can
Become potentiometer, the adjustment circuit module is used to determine to close between antenna for base station vertical dip angle angle value and analog-digital converter output voltage
System；
The transmission device being respectively connected with the moved end of phase shifter and the straight line variable potentiometer；
It is connected with the transmission device, receives default angle value, according to the antenna for base station vertical dip angle angle value and modulus
Relation calculates output voltage corresponding with the default angle value between converter output voltage, defeated when the analog-digital converter
When going out voltage not equal to the output voltage corresponding with the default angle value, control the transmission device drive it is described directly
The moved end of line variable potentiometer and phase shifter movement, until the output voltage of the analog-digital converter be equal to it is described with it is described
Output voltage corresponding to default angle value, to adjust the processor of the vertical dip angle of antenna for base station.
2. device according to claim 1, it is characterised in that the adjustment circuit module also includes：
One end is connected with the moved end of the straight line variable potentiometer, the electricity that one end is connected with the input of the analog-digital converter
Resistance；
One end is connected with the resistance, the electric capacity of one end ground connection；
One end is connected with the power supply of the analog-digital converter, the diode of one end ground connection.
3. device according to claim 1, it is characterised in that the transmission device includes：
It is being connected with the processor, when the analog-digital converter output voltage not equal to described with the default angle value
During corresponding output voltage, the motor being turned on and off is controlled by the processor；
By the motor-driven gear train；
The screw shaft being socketed in the driven gear of the gear train；
With the screw rod axis connection, the screw rod of the setting phase shifter；
The graduated scale being connected with the screw rod；
The pull bar being connected respectively with the moved end of the graduated scale and the straight line variable potentiometer.
4. device according to claim 1, it is characterised in that the processor and the adjustment circuit module are integrally disposed
For integrated control adjustment unit.
5. device according to claim 4, it is characterised in that the integrated control adjustment unit also includes：
Package casing and the jointing being connected with the transmission device.
A kind of 6. antenna for base station vertical dip angle method of adjustment, it is characterised in that for the device described in claim 1, including：
Receive default angle value；
According to relation between the antenna for base station vertical dip angle angle value and analog-digital converter output voltage and default aerial angle model
Enclose with phase shifter displacement range, calculate output voltage corresponding with the default angle value；
Judge whether the current output voltage of the analog-digital converter is corresponding with the default angle value equal to described in export
Voltage；
If it is not, then the transmission device is controlled to drive the moved end of the straight line variable potentiometer and the phase shifter to move, directly
Output voltage to the analog-digital converter is equal to the output voltage corresponding with the default angle value, to adjust base station
The processor of the vertical dip angle of antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710745997.7A CN107681271A (en) | 2017-08-26 | 2017-08-26 | Communication base station aerial signal vertical dip angle adjustment intelligent actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710745997.7A CN107681271A (en) | 2017-08-26 | 2017-08-26 | Communication base station aerial signal vertical dip angle adjustment intelligent actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107681271A true CN107681271A (en) | 2018-02-09 |
Family
ID=61134318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710745997.7A Pending CN107681271A (en) | 2017-08-26 | 2017-08-26 | Communication base station aerial signal vertical dip angle adjustment intelligent actuator |
Country Status (1)
| Country | Link |
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| CN (1) | CN107681271A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113079594A (en) * | 2021-04-14 | 2021-07-06 | 武汉盛景通联科技有限公司 | Installation mechanism of 5G basic station |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474774A (en) * | 2012-06-08 | 2013-12-25 | 罗森伯格（上海）通信技术有限公司 | Apparatus and method for adjusting electrical downtilt of base station antenna |
| CN106788800A (en) * | 2016-12-23 | 2017-05-31 | 中天宽带技术有限公司 | A kind of distal end monitoring aerial angle of inclination and the system and method for correcting |
| CN106937300A (en) * | 2015-12-29 | 2017-07-07 | 上海无线通信研究中心 | A kind of method that dynamic and intelligent adjusts Downtilt |
-
2017
- 2017-08-26 CN CN201710745997.7A patent/CN107681271A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474774A (en) * | 2012-06-08 | 2013-12-25 | 罗森伯格（上海）通信技术有限公司 | Apparatus and method for adjusting electrical downtilt of base station antenna |
| CN106937300A (en) * | 2015-12-29 | 2017-07-07 | 上海无线通信研究中心 | A kind of method that dynamic and intelligent adjusts Downtilt |
| CN106788800A (en) * | 2016-12-23 | 2017-05-31 | 中天宽带技术有限公司 | A kind of distal end monitoring aerial angle of inclination and the system and method for correcting |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113079594A (en) * | 2021-04-14 | 2021-07-06 | 武汉盛景通联科技有限公司 | Installation mechanism of 5G basic station |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 232000, Huainan economic and Technological Development Zone, Anhui province intelligent equipment manufacturing industry park, building 8 Applicant after: Huainan Lvdong Electric Machinery Manufacturing Co., Ltd Address before: 232000, Huainan economic and Technological Development Zone, Anhui province intelligent equipment manufacturing industry park, building 8 Applicant before: Huainan rhythm Motor Manufacturing Co., Ltd. |
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Application publication date: 20180209 |