CN208350882U - A kind of power information acquisition terminal based on DC wave recording - Google Patents
A kind of power information acquisition terminal based on DC wave recording Download PDFInfo
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- CN208350882U CN208350882U CN201820872254.6U CN201820872254U CN208350882U CN 208350882 U CN208350882 U CN 208350882U CN 201820872254 U CN201820872254 U CN 201820872254U CN 208350882 U CN208350882 U CN 208350882U
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- 238000013500 data storage Methods 0.000 claims description 8
- 238000004088 simulation Methods 0.000 claims description 4
- 230000000007 visual effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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Abstract
A kind of power information acquisition terminal based on DC wave recording, including data acquisition means, data acquisition means are used to acquire the DC analogue quantity of electric system, and DC analogue quantity includes at least DC current, DC voltage；Data processing device, data processing device are connect with data acquisition means；Alarm appliance, alarm appliance are connect with data processing device；The data processing device DC analogue quantity that sampler acquires for receiving data, and when DC analogue quantity is more than or equal to standard DC analogue quantity, it executes recording to operate to obtain recorded wave file, and sends alarm signal to alarm appliance so that alarm appliance starting alarm.Implement the utility model embodiment, can effectively supervise the abnormal conditions of DC analogue quantity, improves the safety of direct current system power supply.
Description
Technical field
The utility model relates to DC wave recording field more particularly to a kind of power information acquisition terminals based on DC wave recording.
Background technique
Currently, direct current system due to its not by generator, power generation station service and system operation mode influenced, being capable of conduct
Independent current source power supply, and in the case where external alternating current interrupts, guarantee to be continued to provide direct current by backup power supply (battery)
Source, therefore, direct current system be widely used in power plant, substation, subway and other use DC equipment place.However,
In the extensive use of direct current system, but lack effective supervision for direct current system, such as in subway DC power-supply system,
If there is current leakage and supervision it is improper, leakage current can building made of the metal to subway surrounding cause to corrode, seriously
Structure of the subway is endangered, there are huge security risks.
Utility model content
The utility model discloses a kind of power information acquisition terminal based on DC wave recording can be improved direct current system power supply
Safety.
In order to achieve the above object, the technical solution adopted in the utility model is as follows:
A kind of power information acquisition terminal based on DC wave recording, the power information acquisition terminal include:
Data acquisition means, the data acquisition means are used to acquire the DC analogue quantity of electric system, the direct current mould
Analog quantity includes at least DC current, DC voltage；
Data processing device, the data processing device are connect with the data acquisition means；
Alarm appliance, the alarm appliance are connect with the data processing device；
The data processing device is used to receive the DC analogue quantity of the data acquisition means acquisition, and described
When DC analogue quantity is more than or equal to standard DC analogue quantity, executes recording and operate to obtain recorded wave file, and send alarm
Signal is to the alarm appliance so that alarm appliance starting alarm.
As an alternative embodiment, the alarm appliance is also used to starting in the utility model embodiment
Warning message is sent after alarm to the data processing device, the data processing device is also used to receive the warning message
And recording is executed according to the warning message and operates to obtain the recorded wave file.
As an alternative embodiment, in the utility model embodiment, the power information acquisition terminal further includes
Timing device, the timing device are connect with the data processing device, and the timing device is for counting the DC simulation
Amount is more than or equal to the target duration of the master die analog quantity, and when the target duration is greater than standard duration, sends super
When signal to the data processing device, the data processing device is also used to receive the timeout signal and according to the time-out
Signal executes the recording and operates to obtain the recorded wave file, and sends the alarm signal to institute according to the timeout signal
State alarm appliance.
As an alternative embodiment, the DC analogue quantity further includes direct current in the utility model embodiment
Voltage, the data processing device is also used to analyze the collected DC voltage of the data acquisition means, and obtains institute
The ripple voltage virtual value and ripple coefficient of DC voltage are stated, and effective in the ripple voltage virtual value and standard ripple voltage
When value mismatches and/or the ripple factor is mismatched with standard ripple factor, executes the recording and operate to obtain the recording
File, and the alarm signal is sent to the alarm appliance so that alarm appliance starting alarm.
As an alternative embodiment, in the utility model embodiment, the power information acquisition terminal further includes
Data storage device, the data storage device are connect with the data processing device, and the data storage device is for storing
The DC analogue quantity and the recorded wave file that the data processing device is sent.
As an alternative embodiment, in the utility model embodiment, the power information acquisition terminal further includes
Display device, the display device are connect with the data processing device, and the data processing device is also used in the direct current
When analog quantity is more than or equal to standard DC analogue quantity, transmission displays signal to the display device, so that the display
Part shows the DC analogue quantity, the standard DC analogue quantity and the margin of error；Wherein, the margin of error is the direct current mould
Absolute value of the difference between analog quantity and the standard DC analogue quantity.
As an alternative embodiment, in the utility model embodiment, the power information acquisition terminal further includes
Terminal shell and the lid that connection is closed with the terminal shell lid, the data acquisition means and the data processing device are all provided with
In in the terminal shell, the alarm appliance is arranged on the terminal shell.
As an alternative embodiment, the alarm appliance is to be arranged described in the utility model embodiment
Combined aural and visual alarm on terminal shell.
As an alternative embodiment, the outer surface of the terminal shell is formed in the utility model embodiment
Display area and wire area, in the display area, several terminals are arranged in the wire area for the display device setting
Mouthful, the Wiring port is connect with the data processing device, and the Wiring port is for connecting external output equipment, to realize
The electric connection of the external output equipment and the data processing device.
As an alternative embodiment, the wire area includes positioned at described in the utility model embodiment
The forceful electric power wire area of terminal shell one side and light current wire area positioned at the terminal shell another side, the forceful electric power
Wire area is provided with forceful electric power Wiring port, and the light current wire area is provided with light current Wiring port.
Compared with prior art, the utility model embodiment has the advantages that
Power information acquisition terminal provided by the embodiment of the utility model based on DC wave recording, by the way that data collector is arranged
The DC analogue quantity of collected electric system is sent to data processing device by part, enables data processing device in direct current
Analog quantity and pre-set standard DC analogue quantity compare, if DC analogue quantity is more than or equal to pre-set standard straight
Flow field simulation amount executes recording and operates to obtain recorded wave file, and sends alarm signal to alarm appliance so that alarm appliance starts
Alarm, can calculate DC source power quality parameter, judge the alarm of power quality superthreshold and startup separator recording.Using above-mentioned
Mode, can judge whether electrical equipment DC power supply supplied character meets equipment normal operation, and and alarm and life in time
At recorded wave file, to realize the abnormal conditions for effectively supervising DC analogue quantity in real time, the safety of direct current system power supply is improved
Property.
Detailed description of the invention
In order to illustrate more clearly of the technical scheme in the embodiment of the utility model, will make below to required in embodiment
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are merely some embodiments of the present invention,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is a kind of structural representation of the power information acquisition terminal based on DC wave recording disclosed in the utility model embodiment
Figure；
Fig. 2 is a kind of forceful electric power wiring of the power information acquisition terminal based on DC wave recording disclosed in the utility model embodiment
The structural schematic diagram in region；
Fig. 3 is a kind of light current wiring of the power information acquisition terminal based on DC wave recording disclosed in the utility model embodiment
The structural schematic diagram in region.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
It clearly and completely describes, it is clear that described embodiment is only the utility model a part of the embodiment, rather than whole realities
Apply example.Based on the embodiments of the present invention, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained, fall within the protection scope of the utility model.
In the present invention, term " on ", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outside",
" in ", "vertical", "horizontal", " transverse direction ", the orientation or positional relationship of the instructions such as " longitudinal direction " be orientation based on the figure or
Positional relationship.These terms are not intended to limit indicated primarily to better describe the utility model and embodiment
Device, element or component must have particular orientation, or be constructed and operated with particular orientation.
Also, above-mentioned part term is other than it can be used to indicate that orientation or positional relationship, it is also possible to for indicating it
His meaning, such as term " on " also are likely used for indicating certain relations of dependence or connection relationship in some cases.For ability
For the those of ordinary skill of domain, the concrete meaning of these terms in the present invention can be understood as the case may be.
In addition, term " installation ", " setting ", " being equipped with ", " connection ", " connected " shall be understood in a broad sense.For example, it may be solid
Fixed connection, is detachably connected or monolithic construction；It can be mechanical connection, or electrical connection；It can be directly connected, either
It indirectly connected through an intermediary, or is two connections internal between device, element or component.For this field
For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In addition, term " first ", " second " etc. are mainly used for distinguishing different devices, element or component (specifically
Type and construction may it is identical may also be different), be not intended to show or implies meaning showing device, element or component
Relative importance and quantity.Unless otherwise indicated, the meaning of " multiple " is two or more.
It is whole to a kind of power information acquisition based on DC wave recording provided by the embodiment of the utility model below with reference to attached drawing
End is described in detail.
Also referring to Fig. 1 to Fig. 3, a kind of power information acquisition terminal based on DC wave recording of the utility model embodiment
Including data acquisition means 11, data processing device 12 and alarm appliance 13, the data processing device 12 and data collector
Part 11 connects, and alarm appliance 13 is connect with data processing device 12.Wherein, data acquisition means 11 are for acquiring electric system
DC analogue quantity, DC analogue quantity include at least DC current, DC voltage.Data processing device 12 acquires for receiving data
The DC analogue quantity that device 11 acquires, and when DC analogue quantity is more than or equal to standard DC analogue quantity, execute recording behaviour
Recorded wave file is obtained, and sends alarm signal to alarm appliance 13 so that the starting alarm of alarm appliance 13.
In the present embodiment, which not only may include above-mentioned DC current, may also include DC voltage, wink
When amount data, electric energy data, instantaneous statistic data and AI/DI acquisition data etc., in the present embodiment without limitation.
In the present embodiment, which can be combined aural and visual alarm, i.e. the mode of the starting of alarm appliance 13 alarm can
Think sending alarm sound, or send flash signal to corresponding lamplight component so that the corresponding lamplight component flashing
Alarm light etc., in the present embodiment without limitation.
As an alternative embodiment, power information acquisition terminal can also include trouble hunting device 17, the failure
Maintenance device 17 is connect with data processing device 12, when DC analogue quantity and standard DC analogue quantity mismatch, data processing
Device 12 can further will after executing recording and operate to obtain recorded wave file, and transmission alarm signal to alarm appliance 13
The DC analogue quantity and the standard DC analogue quantity are sent to trouble hunting device 17, so that the trouble hunting device 17
The automatic inspection to power information acquisition terminal can be executed according to the DC analogue quantity received and the standard DC analogue quantity
It repairs.It is understood that in other embodiments, which can also be more than or equal to mark in DC analogue quantity
When quasi- DC analogue quantity, the DC analogue quantity and the standard DC analogue quantity are preferentially sent to trouble hunting device 17, so
It executes recording again afterwards to operate to obtain recorded wave file, and sends alarm signal to alarm appliance 13.
In such a way that trouble hunting device 17 automatically overhauls power information acquisition terminal automatically, it may be implemented straight
When flow field simulation amount is more than or equal to standard DC analogue quantity, start the automatic maintenance to power information acquisition terminal, so as to logical
It crosses the trouble hunting device 17 and excludes most common failure problem automatically, effectively ensure the job stability of direct current system.
In the present embodiment, alarm appliance 13 is also used to send warning message to data processing device after starting alarm
12, data processing device 12 is also used to receive warning message and executes recording according to warning message and operates to obtain recorded wave file.
Further, power information acquisition terminal further includes timing device 14, and timing device 14 and data processing device 12 connect
It connects, timing device 14 is used to count the target duration that DC analogue quantity is more than or equal to master die analog quantity, and in target duration
When greater than standard duration, timeout signal is sent to data processing device 12, data processing device 12 is also used to receive timeout signal
And recording is executed according to the timeout signal and operates to obtain recorded wave file, and alarm signal is sent to alarm according to timeout signal
Device 13.Specifically, when the data processing device 12 judges that the DC analogue quantity is more than or equal to master die analog quantity, the number
According to processing apparatus 12 can triggering timing device 14 start count DC analogue quantity be more than or equal to master die analog quantity target
Duration.In this manner, further judge that the DC analogue quantity is more than or equal to master die using timing device 14
The target duration of analog quantity, thus i.e. triggering alarm and recording when can effectively avoid transient current more than or equal to master die analog quantity
Mode, reduce false triggering alarm and recording probability, improve the precision of triggering.
As an alternative embodiment, when the DC analogue quantity further includes DC voltage, data processing device 12
It can also be used to analyze the collected DC voltage of data acquisition means 11, and obtain the ripple voltage virtual value of DC voltage, and
When ripple voltage virtual value and standard ripple voltage virtual value mismatch, executes recording and operate to obtain recorded wave file, Yi Jifa
Send alarm signal to alarm appliance 13 so that the starting alarm of alarm appliance 13.
As another optional embodiment, the data processing device 12 can also be used in analyze data acquisition means 11 adopt
The DC voltage collected, and the ripple factor of DC voltage is obtained, and when ripple factor and standard ripple factor mismatch, hold
Row recording operates to obtain recorded wave file, and sends alarm signal to alarm appliance 13 so that the starting alarm of alarm appliance 13.
As another optional embodiment, which can also be in the ripple voltage virtual value and standard
When ripple voltage virtual value and ripple factor and standard ripple factor mismatch, executes recording and operates to obtain recorded wave file,
And alarm signal is sent to alarm appliance 13 so that the starting alarm of alarm appliance 13.
Further, data processing device 12 analyzes the collected DC voltage of data acquisition means 11, available straight
The peak systole Uf of the galvanic electricity pressure and pulsation valley Ug of DC voltage, and according to the first preset formula, peak systole Uf and arteries and veins
Dynamic valley Ug calculates ripple voltage virtual value Urms, wherein the first preset formula is as follows:
Data processing device 12 is also used to according to the second preset formula, peak systole Uf and pulsation valley Ug and direct current
Average voltage Up calculates ripple factor δ, wherein the second preset formula is as follows:
It follows that can calculate separately according to the first preset formula and the second preset formula and show that ripple voltage is effective
Value and ripple factor, in ripple voltage virtual value and standard ripple voltage virtual value mismatch and/or ripple factor and standard
When ripple factor mismatches, data processing device 12 can also execute recording and operate to obtain recorded wave file, and to alarm appliance
13 send alarm signal, to increase the supervision scope of supervision DC analogue quantity, so that supervision is relatively reliable, improve straight
The safety of streaming system power supply.
Further, power information acquisition terminal further includes data storage device 15, data storage device 15 and data processing
Device 12 connects, the DC analogue quantity that processing apparatus 12 is sent for storing data of data storage device 15 and recorded wave file.
In the present embodiment, power information acquisition terminal further includes display device 16, display device 16 and data processing device
12 connections, data processing device 12 are also used to send display when DC analogue quantity is more than or equal to standard DC analogue quantity
Signal is to display device 16, so that display device 16 shows DC analogue quantity, standard DC analogue quantity and the margin of error；Wherein,
Margin of error absolute value of the difference between DC analogue quantity and standard DC analogue quantity.
By the setting of display device 16, it can intuitively reflect the mistake between DC analogue quantity and standard DC analogue quantity
Poor situation allows staff further to implement different error solutions for different error conditions, is conducive to
Improve the efficiency that error solves.
Further, power information acquisition terminal further includes terminal shell 1 and covers the lid for closing and connecting with terminal shell 1 (not
Diagram), data acquisition means 11 and data processing device 12 are set in terminal shell 1, and alarm appliance 13 is arranged in terminal shell
On body 1.
In the present embodiment, alarm appliance 13 can be the combined aural and visual alarm being arranged on terminal shell 1.And timing device
14 can be set in terminal shell 1.
Optionally, timing device 14 can also be connect with display device 16, and timing device 14 can send timing result
To display device 16, master die is more than or equal to the DC analogue quantity that display timer part 14 counts on display device 16
The target duration of analog quantity is realized and intuitively reflects timing situation.
Further, the outer surface of terminal shell 1 forms display area (not shown) and wire area (not shown), display
Several Wiring ports are arranged in display area, wire area in the setting of device 16, and Wiring port connect with data processing device 12, connects
Line end mouth is for connecting external output equipment, to realize the electric connection of external output equipment Yu data processing device 12.
In the present embodiment, wire area includes positioned at the forceful electric power wire area 10 of 1 one side of terminal shell and positioned at eventually
The light current wire area 19 of 1 another side of end housing, forceful electric power wire area 10 are provided with several forceful electric power Wiring ports 101, light current
Wire area 19 is provided with several light current Wiring ports 191.
Using the side for two sides that forceful electric power wire area 10 and light current wire area 19 are separately positioned on to terminal shell 1
Formula is, it can be achieved that by forceful electric power Wiring port 101 and the isolation setting of light current Wiring port 191, it is ensured that forceful electric power Wiring port 101 and light current
Effect is dielectrically separated between Wiring port 191.
Power information acquisition terminal provided by the embodiment of the utility model based on DC wave recording, by the way that data collector is arranged
The DC analogue quantity of collected electric system is sent to data processing device 12 by part, and data processing device 12 is existed
When DC analogue quantity is more than or equal to standard DC analogue quantity, executes recording and operate to obtain recorded wave file, and send alarm
Signal is to alarm appliance 13 so that the starting alarm of alarm appliance 13.Using aforesaid way, electrical equipment direct current can be judged in time
Power supply power supply characteristic whether meet equipment normal operation, and and alarm and generate recorded wave file, thus realize in real time effectively prison
The abnormal conditions of pipe DC analogue quantity improve the safety of direct current system power supply.
A kind of power information acquisition terminal based on DC wave recording disclosed in the utility model embodiment has been carried out in detail above
Thin to introduce, specific case used herein is expounded the principles of the present invention and embodiment, above embodiments
Explanation be merely used to help understand a kind of the power information acquisition terminal and its core based on DC wave recording of the utility model and think
Think；At the same time, for those skilled in the art in specific embodiment and applies model based on the idea of the present invention
Place that there will be changes, to sum up, the content of the present specification should not be construed as a limitation of the present invention.
Claims (10)
1. a kind of power information acquisition terminal based on DC wave recording, which is characterized in that the power information acquisition terminal includes:
Data acquisition means, the data acquisition means are used to acquire the DC analogue quantity of electric system, the DC analogue quantity
Including at least DC current, DC voltage；
Data processing device, the data processing device are connect with the data acquisition means；
Alarm appliance, the alarm appliance are connect with the data processing device；
The data processing device is used to receive the DC analogue quantity of the data acquisition means acquisition, and in the direct current
When analog quantity is more than or equal to standard DC analogue quantity, executes recording and operate to obtain recorded wave file, and send alarm signal
To the alarm appliance so that alarm appliance starting alarm.
2. power information acquisition terminal according to claim 1, which is characterized in that the alarm appliance is also used to report in starting
Warning message is sent after alert to the data processing device, the data processing device is also used to receive the warning message simultaneously
Recording is executed according to the warning message to operate to obtain the recorded wave file.
3. power information acquisition terminal according to claim 1 or 2, which is characterized in that the power information acquisition terminal also wraps
Timing device is included, the timing device is connect with the data processing device, and the timing device is for counting the direct current mould
Analog quantity is more than or equal to the target duration of the standard DC analogue quantity, and when the target duration is greater than standard duration,
Timeout signal is sent to the data processing device, the data processing device is also used to receive the timeout signal and according to institute
It states the timeout signal execution recording to operate to obtain the recorded wave file, and the alarm signal is sent according to the timeout signal
Number to the alarm appliance.
4. power information acquisition terminal according to claim 1 or 2, which is characterized in that the data processing device is also used to
Analyze the collected DC voltage of the data acquisition means, and obtain the DC voltage ripple voltage virtual value and
Ripple coefficient, and the ripple voltage virtual value and standard ripple voltage virtual value mismatch and/or the ripple factor with
When standard ripple factor mismatches, executes the recording and operate to obtain the recorded wave file, and send the alarm signal extremely
The alarm appliance is so that alarm appliance starting alarm.
5. power information acquisition terminal according to claim 1, which is characterized in that the power information acquisition terminal further includes number
According to memory device, the data storage device is connect with the data processing device, and the data storage device is for storing institute
State the DC analogue quantity and the recorded wave file that data processing device is sent.
6. power information acquisition terminal according to claim 1, which is characterized in that the power information acquisition terminal further includes showing
Show that device, the display device are connect with the data processing device, the data processing device is also used in the direct current mould
When analog quantity is more than or equal to standard DC analogue quantity, transmission displays signal to the display device, so that the display device
Show the DC analogue quantity, the standard DC analogue quantity and the margin of error；Wherein, the margin of error is the DC simulation
Absolute value of the difference between amount and the standard DC analogue quantity.
7. power information acquisition terminal according to claim 6, which is characterized in that the power information acquisition terminal further includes end
End housing and the lid that connection is closed with the terminal shell lid, the data acquisition means and the data processing device are set to
In the terminal shell, the alarm appliance is arranged on the terminal shell.
8. power information acquisition terminal according to claim 7, which is characterized in that the alarm appliance is to be arranged at the end
Combined aural and visual alarm in end housing.
9. power information acquisition terminal according to claim 7 or 8, which is characterized in that the outer surface shape of the terminal shell
At display area and wire area, in the display area, several wiring are arranged in the wire area for the display device setting
Port, the Wiring port are connect with the data processing device, and the Wiring port is for connecting external output equipment, with reality
The electric connection of the existing external output equipment and the data processing device.
10. power information acquisition terminal according to claim 9, which is characterized in that the wire area includes positioned at described
The forceful electric power wire area of terminal shell one side and light current wire area positioned at the terminal shell another side, the forceful electric power
Wire area is provided with forceful electric power Wiring port, and the light current wire area is provided with light current Wiring port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820872254.6U CN208350882U (en) | 2018-06-06 | 2018-06-06 | A kind of power information acquisition terminal based on DC wave recording |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820872254.6U CN208350882U (en) | 2018-06-06 | 2018-06-06 | A kind of power information acquisition terminal based on DC wave recording |
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| Publication Number | Publication Date |
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| CN208350882U true CN208350882U (en) | 2019-01-08 |
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| CN201820872254.6U Active CN208350882U (en) | 2018-06-06 | 2018-06-06 | A kind of power information acquisition terminal based on DC wave recording |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110609208A (en) * | 2019-09-15 | 2019-12-24 | 杭州拓深科技有限公司 | Portable fault wave recording monitor and wave recording monitoring method thereof |
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2018
- 2018-06-06 CN CN201820872254.6U patent/CN208350882U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110609208A (en) * | 2019-09-15 | 2019-12-24 | 杭州拓深科技有限公司 | Portable fault wave recording monitor and wave recording monitoring method thereof |
| CN110609208B (en) * | 2019-09-15 | 2022-07-15 | 杭州拓深科技有限公司 | Portable fault wave recording monitor and wave recording monitoring method thereof |
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Denomination of utility model: An electrical information acquisition terminal based on DC wave recording Effective date of registration: 20210112 Granted publication date: 20190108 Pledgee: Daxin sub branch of Bank of Guangzhou Co.,Ltd. Pledgor: GUANGZHOU NIKEY ELECTRIC TECHNOLOGY Co.,Ltd. Registration number: Y2021440000008 |
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Effective date of registration: 20240123 Granted publication date: 20190108 |
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