AU2022301223A9 - Power transmission line fault positioning method, recording medium, and data processing apparatus - Google Patents
Power transmission line fault positioning method, recording medium, and data processing apparatus Download PDFInfo
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- AU2022301223A9 AU2022301223A9 AU2022301223A AU2022301223A AU2022301223A9 AU 2022301223 A9 AU2022301223 A9 AU 2022301223A9 AU 2022301223 A AU2022301223 A AU 2022301223A AU 2022301223 A AU2022301223 A AU 2022301223A AU 2022301223 A9 AU2022301223 A9 AU 2022301223A9
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- power transmission
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- synchronous pulse
- positioning method
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000012545 processing Methods 0.000 title claims description 24
- 230000001360 synchronised effect Effects 0.000 claims abstract description 42
- 230000005672 electromagnetic field Effects 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000012937 correction Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000013144 data compression Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 description 14
- 238000004891 communication Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 7
- 238000005070 sampling Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 229910000889 permalloy Inorganic materials 0.000 description 2
- 238000013439 planning Methods 0.000 description 2
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- 230000001143 conditioned effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/11—Locating faults in cables, transmission lines, or networks using pulse reflection methods
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Locating Faults (AREA)
- Near-Field Transmission Systems (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
A power transmission line fault positioning method, comprising: respectively mounting two magnetic field sensors and two synchronous pulse generators on a head-end grounding line and a tail-end grounding line of a power transmission line; the synchronous pulse generator at a head end sending a synchronous pulse to a tail end, and after the magnetic field sensor at the tail end senses the synchronous pulse, the synchronous pulse generator at the tail end sending the same pulse to the head end; respectively recording time points when sending and receiving the synchronous pulses at the head end and the tail end, and calculating a time t
Description
[0001] The present invention belongs to the technical field of electrotechnical
detection, and specifically discloses a power transmission line fault positioning
method, a non-transitory readable recording medium and a data processing apparatus.
[0002] The urban utility tunnel is a municipal public tunnel space built underground
in the city. Municipal public pipelines such as power, communication and water
supply are centrally laid in a structure according to the planning requirements, and
unified planning, design, construction and management are implemented. The messy
situation of own construction and management of each pipeline in the past is
completely changed. When the pipeline needs maintenance, there is no need to
excavate the road, and the maintenance personnel and engineering vehicles only need
to enter the underground tunnel from the maintenance passage, which does not affect
the road traffic, but also reduces the waste caused by repeated excavation. At the same
time, it is also beneficial to save intensive land use, reduce road manhole cover
facilities, reduce pipeline maintenance costs and prolong the service life of the
pipeline.
[0003] Underground transmission lines are the main transmission bodies in the power
warehouse of the urban utility tunnel, mainly including power cables, GIL and so
on. The operation reliability of power utility tunnel equipment is directly related to the
intrinsic safety of the power grid. Due to the special laying mode laid underground, its
state observability is poor, and internal hidden dangers are difficult to find and investigate in time, especially the underground communication signals are restricted, and the fault positioning accuracy is seriously restricted. At present, power supply enterprises often take passive protection measures to solve the hidden dangers of underground power transmission lines, such as installing waterproof, fire/explosion-proof plugs, etc. In extreme cases, personnel are needed to guard and take care of them, and there is a lack of source and systematic technical solutions for the safety of power utility tunnel equipment.
[0004] In order to solve the shortcomings of the prior art, the present invention
provides a power transmission line fault positioning method, a non-transitory readable
recording medium and a data processing apparatus, which can easily and quickly
monitor and position a fault on an underground pipe network.
[0005] In one aspect, the present invention provides a power transmission line fault
positioning method, including the following steps:
[0006] Si, respectively mounting two magnetic field sensors and two synchronous
pulse generators on a head-end grounding apparatus and a tail-end grounding
apparatus of a power transmission line;
[0007] S2, sending a synchronous pulse to a tail end by the synchronous pulse
generator at a head end, and after the magnetic field sensor at the tail end senses the
synchronous pulse, sending the same pulse to the head end by the synchronous pulse
generator at the tail end; respectively measuring time points when sending and
receiving the synchronous pulses at the head end and the tail end of the power
transmission line, and calculating a time tc for which the power transmission line transmits the synchronous pulse once;
[0008] S3, measuring time points when the head-end magnetic field sensor and the
tail-end magnetic field sensor receive electromagnetic field sudden change signals
formed by same current distortion on grounding lines, and calculating a time
difference to of the two time points; and
[0009] S4, using the t, t, and a known line length to represent the position of a fault
point.
[0010] In order to better match different power transmission line media and lengths,
preferably, step Si includes the step of customizing the synchronous pulse.
[0011] Further, the step of customizing the synchronous pulse includes customizing
the number of the synchronous pulses sent per minute, pulse width and period.
[0012] In order to reduce the measurement error due to the "zero drift", preferably, in
step S2 and step S3, a step of zeroing the magnetic field sensor is inserted after
measurement; a step of zero correction is inserted before calculation.
[0013] Preferably, a calculation step in step S4 is performed by obtaining a length L,
of the power transmission line to be measured, and multiplying the L, by a value of
(to/tc + 1)/2 to obtain a distance Lj of the fault point from the head end of the power
transmission line.
[0014] This method of converting the time ratio to the range ratio is simple to use, and
the field engineering technician can self-estimate the approximate position of the fault when communication with the upper machine encounters obstacles.
[0015] Preferably, in step S3, the received electromagnetic field sudden change signal
is converted into a digital signal recognizable and stored by a computer through
analog/digital conversion, and the signal is uploaded to an upper computer for
processing.
[0016] Thus, the upper computer can enter the fault data, which is more convenient to
compare and analyze with the historical data, and quickly make troubleshooting
proposals. It is also convenient for the upper computer to continuously receive new
cases for self-learning and update its own information base.
[0017] Another aspect of the present invention is to provide a non-transitory readable
recording medium storing one or more programs including a plurality of instructions
which, when executed, cause a processing circuit to execute the steps Si-S4 of the
power transmission line fault positioning method.
[0018] A further aspect of the present invention is to provide a data processing
apparatus, which includes a processing circuit including magnetic field sensors and
synchronous pulse generators and a memory electrically coupled thereto, and
characterized in that the memory is configured to store at least one program including
a plurality of instructions, the processing circuit runs the program to execute the steps
Sl-S4 of the power transmission line fault positioning method.
[0019] Compared with the prior art, the invention has the following beneficial effects:
[0020] the underground power transmission line grounding current monitoring and fault positioning method and the corresponding apparatus of the invention adopt the synchronous pulse generators to carry out system synchronization, convert time parameters into distance parameters, and solve the problem that GPS in the underground tunnel cannot position; and
[0021] the invention adopts magnetic field detection elements, establishes a zero drift
prevention circuit, and improves detection resolving ability and accurate prediction
and evaluation ability of the running state of the underground power transmission line,
in addition, the apparatus is provided with a signal storage module, thus realizing
local caching, analysis and selective uploading of measured data, and reducing data
redundancy of the server, and the application of the method or corresponding
apparatus can significantly reduce the technical threshold of maintenance of the
underground power transmission line, thereby enabling maintenance personnel to do
maintenance work well in advance and reducing losses caused by faults.
[0022] FIG. 1 is an information transmission schematic diagram of a power
transmission line fault positioning method according to an embodiment of the present
invention;
[0023] FIG. 2 is a structural schematic diagram of a magnetic field sensor according
to an embodiment of the present invention; and
[0024] FIG. 3 is a structural schematic diagram of a non-transitory readable recording
medium and a data processing apparatus according to an embodiment of the present
invention.
[0025] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be described below in conjunction with the accompanying drawings in the embodiments of the present invention, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without making innovative labor, belong to the scope of protection of the present invention.
[0026] As shown in FIGS. 1-3, an underground power transmission line grounding
current monitoring and fault positioning system according to the present invention
includes power supplies, magnetic field sensors, synchronous pulse generators, signal
processing circuit modules, AD sampling modules, signal catching modules,
communication modules, a server, and a data processing terminal.
[0027] The power supply is configured to provide a voltage required for operation of
the system.
[0028] The power supply may be taken from the body of the underground power
transmission line through a transformer, or it may be mains electricity or a battery or
the like.
[0029] The magnetic field sensor is configured to detect the grounding current of the
underground power transmission line. The magnetic field sensor includes a magnetic
field detection chip, a magnetic concentrating ring, a demagnetization coil, a shielding
case, a lead-out wire and a fixing element. The magnetic field detection chip may be a
giant magnetoresistance effect (GMR) or tunnel magnetoresistance effect (TMR) chip,
mounted at the air gap of the magnetic concentrating ring, the demagnetizing coil may be a copper wire wound around the outside of the magnetic concentrating ring, and the shielding case may be a two-layer structure of permalloy and copper. Typically, permalloy is 0.2-1 mm thick and copper is 1-5 mm thick. The detection signal of the magnetic field sensor is the grounding current of the underground power transmission line and the output signal is a voltage signal.
[0030] The synchronous pulse generators are used for fault positioning to provide a
synchronization time reference and are mounted at both ends of an underground
power transmission line section to be located. The pulse emitted by the pulse
generator has the customizable characteristic and, typically, can be a single pulse or a
pulse wave with the oscillation attenuation characteristic. Typically, to achieve
real-time synchronization of the system, the number of pulses sent by the synchronous
pulse generator is not less than 100 times per minute, the pulse width is nanosecond,
and the pulse time interval is 1/10 ~ 1/5 pulse width.
[0031] The magnetic field sensor may be integrated with the synchronous pulse
generator to facilitate field installation.
[0032] The signal processing circuit module is configured to receive the signals of the
magnetic field sensors and the synchronous pulse generators, simultaneously provide
the magnetic field sensors and the synchronous pulse generators with the required
voltages for operation, condition, filter, and amplify the measurement signals of the
magnetic field sensors, and demagnetize the magnetic ring.
[0033] Because the magnetic field sensor is easily disturbed by external temperature
and test time, zero drift is generated, so the signal processing module designed by the
invention includes a zero correction circuit. The correction circuit consists of a variable resistor, a fixed resistor and an operational amplifier. The variable resistor has a high correlation with test temperature or test time, which is typically a linear correlation. The variable resistor is connected to the input end of the operational amplifier, the fixed resistor is connected across the input and output ends of the operational amplifier, and the voltage output from the operational amplifier is a temperature compensated voltage to provide an operating voltage for the magnetic field detection chip of the magnetic field sensor.
[0034] The AD sampling module is configured to receive the modal detection signal
outputted by the signal processing circuit module, and carry out A/D conversion on
the signal to output the digital signal.
[0035] The signal caching module is configured to cache the digital signal of the AD
sampling module with a caching data amount greater than 512 MB, and the
monitoring data can be stored and queried locally for at least 3 months. The signal
caching module includes a data comparison unit. When the change amount of the
monitoring data is greater than or equal to the preset value, the current monitoring
data information is immediately sent to the server through a communication module.
When the change amount of the monitoring data is less than the preset value, the
maximum value or the average value of the monitoring data in the preset sending time
interval (such as 1 hour) is sent according to the preset sending time interval.
[0036] The communication module is configured to transmit the monitoring data to a
data analysis carrier. Typically, 4G, 5G or power ad hoc communications may be
employed.
[0037] The server is configured to collect and store grounding current monitoring data.
[0038] The data processing terminal is configured to extract the grounding current
monitoring data within the server to obtain grounding current or fault position related
parameters. The related parameters include at least: grounding current amplitude,
monitoring time and fault position, fault time.
[0039] In the case of an underground power transmission line having a head end and a
tail end, according to an embodiment of the present invention, the operation method
of the underground power transmission line grounding current monitoring and fault
positioning apparatus includes:
[0040] the magnetic field sensors 1, 2 and the synchronous pulse generators 1, 2 of the
underground power transmission line are mounted on a head-end grounding line and a
tail-end grounding line, respectively;
[0041] the power supplies 1, 2 start to supply power for the signal processing modules
1, 2, enabling the apparatus to work; and
[0042] the synchronous pulse generators mounted on the head end and the tail end of
the underground power transmission line emit synchronous pulses from the head end
to the tail end, after the transmission time of the underground power transmission line,
the synchronous pulse is measured by the magnetic field sensor at the tail end, and
after a certain time interval, the same pulse is sent to the first end, and the pulse is
measured by the magnetic field sensor at the head end.
[0043] The synchronous pulse generators mounted at the head end and the tail end of the underground power transmission line transmit synchronous pulses from the head end to the tail end, after the transmission time tc of the underground power transmission line, the magnetic field sensor at the tail end senses the synchronous pulse, and after a certain time interval t, the same pulse is sent to the head end, which is measured by the magnetic field sensor at the head end. The time difference between the two pulses detected at the head end is t, so the cable propagation time tc= (ts-tw)/2.
[0044] In the fault positioning measurement process, the time points when the
head-end magnetic field sensor and the tail-end magnetic field sensor receive
electromagnetic field sudden change signals formed by same current distortion on the
grounding lines are measured, and a difference value to of the two time points is
calculated; a line length L, is called out from the system, and the fault position Lj can
be determined by:
Lj = L, (to/tc + 1)/2
[0045] The grounding current flows through the head-end grounding line and the
tail-end grounding line, and the magnetic field sensor 1 and the magnetic field sensor
2 measure the magnetic field spike caused by the grounding current and convert the
spike into a voltage signal;
[0046] the output voltage signal of the magnetic field sensor is conditioned, filtered
and amplified by the signal processing circuit module to obtain a voltage analog
signal output;
[0047] the AD sampling module converts the voltage analog signal into a digital
signal, and the digital signal enters the signal catching module for catching and
comparison;
[0048] the signal processing circuit module applies a reverse current signal to the
demagnetization coil of the magnetic field sensor to zero the magnetic field sensor;
[0049] the magnetic field sensor measures again, and repeats the above steps; and
[0050] the monitoring data is gathered to the server via the communication module
and stored, and the data processing terminal performs signal characteristic extraction,
analysis and presentation, the presentation information includes grounding current
amplitude, monitoring time and fault position, fault time.
[0051] It will be understood by those skilled in the art that all or part of the steps of
the above method embodiments may be implemented by hardware associated with
instructions of a program, and the aforementioned program may be stored in a storage
medium readable by a computing device, and the program, when executed, performs
the steps including the above method embodiments.
[0052] From the above description of the embodiments, it will be clear to those skilled
in the art that the embodiments may be implemented by means of software
programming plus general purpose computer hardware devices, or entirely by means
of hardware. Based on this understanding, what the above solution contributes to the
prior art can be realized in the form of a software product that can be stored on a
computing device-readable medium, such as a hard disk, an optical disk, etc.,
containing a number of instructions for making a computing device perform the
embodiments or parts of the methods.
[0053] Finally, it should be noted that: what has been described above is only a
preferred embodiment of the present invention, and is not intended to limit the present invention. While the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the forgoing embodiments or to make equivalent substitutions for some technical features thereof.
Any modifications, equivalents, modifications, etc. made within the spirit and
principles of the present invention shall be included within the scope of protection of
the present invention.
Claims (8)
1. A power transmission line fault positioning method, characterized by comprising
the following steps:
Si, respectively mounting two magnetic field sensors and two synchronous
pulse generators on a head-end grounding apparatus and a tail-end grounding
apparatus of a power transmission line;
S2, sending a synchronous pulse to a tail end by the synchronous pulse
generator at a head end, and after the magnetic field sensor at the tail end senses the
synchronous pulse, sending the same pulse to the head end by the synchronous pulse
generator at the tail end; respectively measuring time points when sending and
receiving the synchronous pulses at the head end and the tail end of the power
transmission line, and calculating a time tc for which the power transmission line
transmits the synchronous pulse once;
S3, measuring time points when the head-end magnetic field sensor and the
tail-end magnetic field sensor receive electromagnetic field sudden change signals
formed by same current distortion on grounding lines, and calculating a time
difference to of the two time points; and
S4, using the t, t, and a known line length to represent the position of a fault
point.
2. The power transmission line fault positioning method according to claim 1,
characterized in that step S Icomprises the step of customizing the synchronous pulse.
3. The power transmission line fault positioning method according to claim 2,
characterized in that the step of customizing the synchronous pulse specifically comprises customizing the number of the synchronous pulses sent per minute, pulse width and period.
4. The power transmission line fault positioning method according to claim 1,
characterized in that, in step S2 and step S3, a step of zeroing the magnetic field
sensor is inserted after measurement; a step of zero correction is inserted before
calculation.
5. The power transmission line fault positioning method according to claim 1,
characterized in that a calculation step in step S4 is performed by obtaining a length
Lc of the power transmission line to be measured, and multiplying the L, by a value of
(t/tc + 1)/2 to obtain a distance Lj of the fault point from the head end of the power
transmission line.
6. The power transmission line fault positioning method according to claim 1,
characterized in that, in step S3, the received electromagnetic field sudden change
signal is converted into a digital signal recognizable and stored by a computer through
analog/digital conversion, and the signal is uploaded to an upper computer for
processing.
7. A non-transitory readable recording medium storing one or more programs
comprising a plurality of instructions, characterized in that the program comprises the
steps comprised in the power transmission line fault positioning method according to
any one of claims 1-6.
8. A data processing apparatus, comprising a processing circuit comprising magnetic
field sensors and synchronous pulse generators and a memory electrically coupled thereto, characterized in that the memory is configured to store at least one program comprising a plurality of instructions, the processing circuit runs the program to execute the electromagnetic energy system service timing data compression method according to any one of claims 1-6.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110729845.4A CN113484695B (en) | 2021-06-29 | 2021-06-29 | Power transmission line fault positioning method, recording medium and data processing device |
| CN202110729845.4 | 2021-06-29 | ||
| PCT/CN2022/104913 WO2023274419A1 (en) | 2021-06-29 | 2022-07-11 | Power transmission line fault positioning method, recording medium, and data processing apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2022301223A1 AU2022301223A1 (en) | 2023-08-24 |
| AU2022301223A9 true AU2022301223A9 (en) | 2024-05-16 |
Family
ID=77936438
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2022301223A Pending AU2022301223A1 (en) | 2021-06-29 | 2022-07-11 | Power transmission line fault positioning method, recording medium, and data processing apparatus |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN113484695B (en) |
| AU (1) | AU2022301223A1 (en) |
| WO (1) | WO2023274419A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113484695B (en) * | 2021-06-29 | 2022-05-03 | 国网电力科学研究院武汉南瑞有限责任公司 | Power transmission line fault positioning method, recording medium and data processing device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH649847A5 (en) * | 1979-05-04 | 1985-06-14 | Bbc Brown Boveri & Cie | Method for fault location in an electrical line |
| JPS63206668A (en) * | 1987-02-23 | 1988-08-25 | Sumitomo Electric Ind Ltd | Apparatus for locating accident point of transmission line |
| US6161077A (en) * | 1999-01-05 | 2000-12-12 | Hubbell Incorporated | Partial discharge site location system for determining the position of faults in a high voltage cable |
| CN1324323C (en) * | 2004-09-30 | 2007-07-04 | 杨军 | Accurately positioning method and device for underground layered power cable defect position |
| CN102798804B (en) * | 2012-08-20 | 2015-05-13 | 广州供电局有限公司 | High-voltage power cable fault on-line positioning device |
| CN105067964B (en) * | 2015-08-04 | 2017-11-07 | 华南理工大学 | A kind of security protection detection method and device based on electric pulse |
| CN107748317B (en) * | 2017-11-29 | 2019-10-29 | 电子科技大学 | A kind of Precise Position System of buried cable high resistive fault |
| CN110221174A (en) * | 2019-06-21 | 2019-09-10 | 广东电网有限责任公司 | A kind of tuning on-line device and method of transmission line malfunction |
| CN111751687A (en) * | 2020-07-15 | 2020-10-09 | 国网电力科学研究院武汉南瑞有限责任公司 | Direct current cable partial discharge and fault breakdown positioning system |
| CN113484695B (en) * | 2021-06-29 | 2022-05-03 | 国网电力科学研究院武汉南瑞有限责任公司 | Power transmission line fault positioning method, recording medium and data processing device |
-
2021
- 2021-06-29 CN CN202110729845.4A patent/CN113484695B/en active Active
-
2022
- 2022-07-11 AU AU2022301223A patent/AU2022301223A1/en active Pending
- 2022-07-11 WO PCT/CN2022/104913 patent/WO2023274419A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023274419A1 (en) | 2023-01-05 |
| CN113484695A (en) | 2021-10-08 |
| CN113484695B (en) | 2022-05-03 |
| AU2022301223A1 (en) | 2023-08-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| SREP | Specification republished |