CN209247956U - A kind of multi-functional cable shelf depreciation intelligent inspection tour instrument - Google Patents
A kind of multi-functional cable shelf depreciation intelligent inspection tour instrument Download PDFInfo
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- CN209247956U CN209247956U CN201822031350.0U CN201822031350U CN209247956U CN 209247956 U CN209247956 U CN 209247956U CN 201822031350 U CN201822031350 U CN 201822031350U CN 209247956 U CN209247956 U CN 209247956U
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Abstract
The utility model discloses a kind of multi-functional cable shelf depreciation intelligent inspection tour instruments, including intelligence sensor and intelligent measurement terminal, the intelligence sensor is connected by wireless network with the intelligent measurement terminal, the intelligence sensor includes superfrequency intelligence sensor, temperature intelligent sensor, infrared imaging intelligence sensor, ultrasonic intelligent sensor, high-frequency current intelligence sensor and grounding circulation intelligence sensor, each intelligence sensor is separately mounted to tested cable nearby or on tested cable, acquires the fault-signal of tested cable；The intelligent measurement terminal includes wireless communication apparatus, single-chip data processor, human-computer interaction interface, data storage, power supply and empty sonic transducer.The multi-functional cable shelf depreciation intelligent inspection tour instrument of the utility model, it is small and exquisite portable, field operation efficiency is improved, realizes that intelligent patrol detection and test report automatically generate, the insulation status of effective detection cable equipment provides the decision-making foundation of science for cable status maintenance.
Description
Technical field
The utility model relates to a kind of multi-functional cable shelf depreciation intelligent inspection tour instruments, belong to electrical equipment fault detection skill
Art field.
Background technique
Power cable is the cable for being used for transmission and distributing electric energy, with the fast development of electric system, crosslinked polyethylene
Power cable is since with good insulation performance and heat resistance, layout is convenient, it is excellent to be not take up ground space, easy to maintain etc.
Point, the specific gravity in power circuit gradually increase, gradually defeated as electric energy important in the urban district of cities and towns instead of overhead transmission line
Send mode.
Since power cable is mostly in embedded underground, working environment is more severe, and especially cable is not easy connector, work of constructing
Skill is complicated, easily forms potential insulation hidden danger, is influenced by factors such as laying environment, electric field action, manufacturing process, power cable meeting
Aging occurs, influences insulation performance, finally causes cable fault.Therefore, Partial Discharge Detection is carried out to power cable, judges electricity
The insulation status of power cable, to guarantee, its safe operation has very important significance.
Domestic electrical appliances have carried out the work of the repair based on condition of component based on live detection, achieve preferable effect.With
More and more power cables are put into power transmission, and traditional detection method and instrument have been unable to meet power cable maintenance
Demand.Shelf depreciation live detection equipment has the following problems in application process at present:
1, hand-held inspection device has a single function, and generally only has high-frequency current for power cable detection or superfrequency is examined
Brake cannot carry out comprehensive analysis using various states parameter；The detection that different function need to be carried when detecting other signals is set
Standby, testing process is cumbersome, inefficiency；
2, though portable inspection device can integrate the technologies such as high-frequency current, superfrequency, ultrasound in one, powerful,
But volume is big, and execute-in-place is complicated, and sensor and analytical equipment are connected often through cable, installation difficulty is increased, using not
It is convenient；
3, test item multiplicity, the test point of live detection are various, cause test data more and miscellaneous, simple in detection process
Manually record is easy to obscure test point and corresponding data and increases difficulty of test, and the specification for being unfavorable for data arranges,
Influence the accuracy of test data.
Utility model content
The purpose of the utility model is to overcome the defect of the prior art, a kind of multi-functional cable shelf depreciation is provided and is intelligently patrolled
Instrument is examined, compact, easy to carry, easy to operate, with no paper operation can greatly simplify the workflow of patrol officer, improve
The working efficiency of patrol officer meets cable live detection inspection requirement, realizes the comprehensive detection of power cable.
Realizing the technical solution of above-mentioned purpose is: a kind of multi-functional cable shelf depreciation intelligent inspection tour instrument, including intelligent biography
Sensor and intelligent measurement terminal, the intelligence sensor are connected by wireless network with the intelligent measurement terminal, in which:
The intelligence sensor include superfrequency intelligence sensor, temperature intelligent sensor, infrared imaging intelligence sensor,
Ultrasonic intelligent sensor, high-frequency current intelligence sensor and grounding circulation intelligence sensor, each intelligence sensor are installed respectively
Near tested cable or on tested cable, the fault-signal of tested cable is acquired；
The intelligent measurement terminal includes wireless communication apparatus, single-chip microcontroller (Microcontroller Unit；MCU) data
Processor, human-computer interaction interface, data storage, power supply and empty sonic transducer；
The wireless communication apparatus is connected with single-chip data processor；
The single-chip data processor receives the data that each intelligence sensor issues by the wireless communication apparatus, and
Data are analyzed；
The human-computer interaction interface is connected with the single-chip data processor；
The data storage is connected with the single-chip data processor；
The power supply is connected with the wireless communication apparatus and single-chip data processor respectively；
The sky sonic transducer is connected with the single-chip data processor.
Above-mentioned a kind of multi-functional cable shelf depreciation intelligent inspection tour instrument, wherein the superfrequency intelligence sensor, temperature
Intelligence sensor, infrared imaging intelligence sensor, ultrasonic intelligent sensor, high-frequency current intelligence sensor and grounding circulation intelligence
Energy sensor includes signal picker, signal processor, wireless communication device and probe power, the signal picker, letter
Number processor and wireless communication device are sequentially connected；The probe power respectively with the signal processor and wireless communication device phase
Even；Wherein:
The signal picker acquires the fault-signal of tested cable, and fault-signal is sent to the signal processing
Device；
The signal processor is filtered to received fault-signal and detection processing, and will be after filtering and detection processing
Fault-signal be converted to digital signal；
The wireless communication device emits digital signal to the intelligent measurement terminal by wireless network；
The probe power is respectively the signal processor and wireless communication device power supply；
The single-chip data processor receives the number of the wireless communication device transmitting by the wireless communication apparatus
Signal, and digital signal is analyzed, obtain amplitude, phase, waveform, pulse and pattern analysis results；
The human-computer interaction interface shows amplitude, phase, waveform, pulse and pattern analysis results, and carries out parameter setting；
The data storage saves test data, and provides corresponding cable information to test data and identify；
The power supply is respectively the wireless communication apparatus and the power supply of single-chip data processor；
The ultrasonic wave that cable local discharge in the sky sonic transducer detection air generates, and ultrasound data is sent
To the single-chip data processor.
Above-mentioned a kind of multi-functional cable shelf depreciation intelligent inspection tour instrument, wherein the sky sonic transducer is arranged described
In the shell of intelligent measurement terminal, and the top being located in the intelligent measurement terminal enclosure；The sky sonic transducer is using non-
Contact sky sonic transducer；The ultrasonic intelligent sensor uses contact ultrasonic sensor, the sky sonic transducer and institute
The combined use of ultrasonic intelligent sensor is stated, the ultrasonic signal that the sky sonic transducer and ultrasonic intelligent sensor measure is logical
The single-chip data processor is crossed to be recorded and played.
Above-mentioned a kind of multi-functional cable shelf depreciation intelligent inspection tour instrument, wherein the temperature intelligent sensor is used and connect
Touch temperature sensor, the contact type temperature sensor precise measurement are tested cable surface point temperature, the temperature knot of measurement
Fruit is sent to the intelligent measurement terminal by wireless network.
Above-mentioned a kind of multi-functional cable shelf depreciation intelligent inspection tour instrument, wherein the grounding circulation intelligence sensor is adopted
The metallic shield grounding current signal of cable is tested with current sensor measurement, which is sent to institute by wireless network
State intelligent measurement terminal.
The multi-functional cable shelf depreciation intelligent inspection tour instrument of the utility model, have it is following the utility model has the advantages that
(1) shelf depreciation, temperature, a variety of detection methods of earth current are used, using various states parameter to electric power electricity
The state of insulation of cable carries out comprehensive analysis, improves the accuracy of diagnostic result；
(2) there is Partial Discharge Detection, grounding circulation detection, infrared thermal imaging detection and single point temperature detection function, collection
It is small in size at a variety of detection functions in one, it is easy to carry, inspection workflow is simplified, the work of patrol officer is reduced
Amount；
(3) carried out data transmission using wireless telecommunications, save the limitation of cable connection, it is easy for installation, it can be achieved that remote
Detection；
(4) test is whole realizes with no paper operation, carries out data record and preservation by logging, improves detection efficiency,
Guarantee the normalization and accuracy of data.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the multi-functional cable shelf depreciation intelligent inspection tour instrument of the utility model；
Fig. 2 is the block diagram of each intelligence sensor in the multi-functional cable shelf depreciation intelligent inspection tour instrument of the utility model.
Specific embodiment
In order to make those skilled in the art be better understood when the technical solution of the utility model, below with reference to attached
Its specific embodiment is described in detail in figure:
Referring to Fig. 1, the most preferred embodiment of the utility model, a kind of multi-functional cable shelf depreciation intelligent inspection tour instrument, packet
Intelligence sensor 1 and intelligent measurement terminal 2 are included, intelligence sensor 1 is mounted on tested cable 30 nearby or on tested cable 30, uses
In the fault-signal for acquiring tested cable；Intelligence sensor 1 is connected by wireless network with intelligent measurement terminal 2, intelligent measurement
Terminal 2 is used to receive the data of the outflow of intelligence sensor 1, realizes data analysis, data storage and analysis as the result is shown.
Intelligence sensor 1 includes superfrequency intelligence sensor 11, temperature intelligent sensor 12, infrared imaging intelligence sensor
13, ultrasonic intelligent sensor 14, high-frequency current intelligence sensor 15 and grounding circulation intelligence sensor 16.Each intelligence sensor
Tested cable is separately mounted to nearby or on tested cable, acquires the fault-signal of tested cable.In intelligence sensor 1:
Superfrequency intelligence sensor 11 is generated extra-high using superfrequency detection technique for detection cable shelf depreciation
Frequency electromagnetic waves signal；
Temperature intelligent sensor 12 is used for detection cable surface point accurate temperature using thermistor detection technique；
Infrared imaging intelligence sensor 13, the Temperature Distribution using infrared thermal imaging technique, for detection cable surface；
Ultrasonic intelligent sensor 14, using ultrasonic detection technology, the ultrasound generated for detection cable shelf depreciation
Wave signal；
High-frequency current intelligence sensor 15 is generated using high-frequency current detection technique for detection cable shelf depreciation
High-frequency current signal；
Grounding circulation intelligence sensor 16 is grounded power current for detection cable using current detection technology.
Intelligent measurement terminal 2 includes wireless communication apparatus 21, single-chip data processor 22, human-computer interaction interface 23, number
According to memory 24, power supply 25 and empty sonic transducer 26.
Wireless communication apparatus 21 is connected with single-chip data processor 22；Single-chip data processor 22 passes through wireless telecommunications
Device 21 receives the data that each intelligence sensor issues, and analyzes data, by the way that different detection patterns is arranged, obtains
Amplitude, phase, waveform, pulse and pattern analysis results；Human-computer interaction interface 23 is connected with single-chip data processor 22；Data
Memory 24 is connected with single-chip data processor 22, provides corresponding cable for saving test data, and to test data
Message identification realizes the with no paper operation of patrol officer；Power supply 25 respectively with wireless communication apparatus 21 and single-chip data processor
22 are connected, and power supply is respectively that wireless communication apparatus 21 and single-chip data processor 22 are powered；Empty sonic transducer 26 and single-chip microcontroller
Data processor 22 is connected, the ultrasonic wave that the cable local discharge in empty sonic transducer detection air generates, and by ultrasonic wave number
According to being sent to single-chip data processor 22.
Referring to Fig. 2, superfrequency intelligence sensor 11, temperature intelligent sensor 12, infrared imaging intelligence sensor 13, super
Sound wave intelligence sensor 14, high-frequency current intelligence sensor 15 and grounding circulation intelligence sensor 16 include signal picker
111, signal processor 112, wireless communication device 113 and probe power 114, signal picker 111,112 and of signal processor
Wireless communication device 113 is sequentially connected；Probe power 114 is connected with signal processor 112 and wireless communication device 113 respectively.
Signal picker 111 acquires the fault-signal of tested cable, and fault-signal is sent to signal processor 112；
Signal processor 112 is filtered to received fault-signal and detection processing, and will filtering and detection treated failure letter
Number be converted to digital signal；Wireless communication device 113 emits digital signal to intelligent measurement terminal 2 by wireless network, realizes
Data wireless transmission；Probe power 114 is respectively that signal processor 112 and wireless communication device 113 are powered, probe power
114 generally use lithium battery.
The multi-functional cable shelf depreciation intelligent inspection tour instrument of the utility model is carrying out cable partial discharge live detection
When, working principle is: intelligence sensor 1 receives the electricity, sound, thermal signal issued when power cable fault, by filtering etc.
The digital signal of conversion is sent to intelligent measurement terminal 2 by wireless WIFI by reason, and intelligent measurement terminal 2 passes through selection test mould
Formula selection receives the digital signal that a certain intelligence sensor issues, analyze it after processing by display screen progress amplitude,
The maps such as phase, waveform, pulse are shown, and save test data and equipment under test information.
(empty sonic transducer 26 is built-in) is arranged in the shell of intelligent measurement terminal in empty sonic transducer 26, and is located at
Top in intelligent measurement terminal enclosure；Empty sonic transducer 26 is detected using contactless empty sonic transducer, empty sonic transducer 26
The ultrasonic wave that cable local discharge in air generates；Ultrasonic intelligent sensor 14 uses contact ultrasonic sensor, empty sound
Sensor 26 is used in combination with ultrasonic intelligent sensor 14, not only can detecte the ultrasonic signal (ultrasound of internal discharge
Wave intelligence sensor), it can also detect the ultrasonic signal (empty sonic transducer) of creeping discharge, the ultrasonic signal measured can
It is recorded and is played by the single-chip data processor of intelligent measurement terminal 1.
Temperature intelligent sensor 12 uses contact type temperature sensor, makes up the low problem of infrared imaging detection accuracy, can
The temperature (tested cable surface point temperature) of precise measurement focus, measurement result is sent to intelligent measurement by wireless network
Terminal.
Grounding circulation intelligence sensor 16 is tested the metallic shield grounding current signal of cable using current sensor measurement,
The operating condition of power cable is judged by measurement power current, current signal passes through nothing after the processing of signal processor 112
Line communicator 113 is sent to intelligent measurement terminal 2.
The multi-functional cable shelf depreciation intelligent inspection tour instrument of the utility model, intelligent measurement terminal 2, the amplitude map of display
In, it can indicate that the severity of electric discharge, green indicate normal with green, yellow, red trichromatism, yellow indicates according to the threshold value of setting
Early warning, red for alarm.
The multi-functional cable shelf depreciation intelligent inspection tour instrument of the utility model, when being detected, comprising the following steps:
Step 1 measures the power current of cable grounding using grounding circulation intelligence sensor 16, checks intelligent measurement end
The current signal amplitude of 2 display of end, excludes temperature anomaly caused by due to overcurrent, over-voltage etc.；
Step 2 measures cable temperature distribution situation using infrared imaging intelligence sensor 13, checks intelligent measurement terminal 2
The temperature profile of display finds out temperature anomaly point；
Step 3 is measured the accurate temperature of temperature anomaly point using temperature intelligent sensor 12, judges the serious journey of failure
Degree；
Step 4, according to the severity of failure, for temperature anomaly point, using superfrequency intelligence sensor 11, ultrasound
Wave intelligence sensor 14 and high-frequency current intelligence sensor 15 successively carry out Partial Discharge Detection to cable, according to distinct methods
The aggregation of data such as the amplitude measured and map carry out fault diagnosis.
In conclusion the multi-functional cable shelf depreciation intelligent inspection tour instrument of the utility model, using shelf depreciation, temperature,
The a variety of detection methods of earth current carry out comprehensive analysis using state of insulation of the various states parameter to power cable, improve
The accuracy of diagnostic result；Function is detected with Partial Discharge Detection, grounding circulation detection, infrared thermal imaging detection and single point temperature
Can, integrate a variety of detection functions in one, it is small in size, it is easy to carry, inspection workflow is simplified, reduces patrol officer's
Workload；Carried out data transmission using wireless telecommunications, saves the limitation of cable connection, it is easy for installation, it can be achieved that remote detection；
Test is whole to realize with no paper operation, carries out data record and preservation by logging, improves detection efficiency, guarantee the rule of data
Plasticity and accuracy.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate that this is practical new
Type, and be not used as the restriction to the utility model, as long as in the spirit of the utility model, to the above
Variation, the modification of embodiment will all be fallen in the Claims scope of the utility model.
Claims (5)
1. a kind of multi-functional cable shelf depreciation intelligent inspection tour instrument, which is characterized in that whole including intelligence sensor and intelligent measurement
End, the intelligence sensor are connected by wireless network with the intelligent measurement terminal, in which:
The intelligence sensor includes superfrequency intelligence sensor, temperature intelligent sensor, infrared imaging intelligence sensor, ultrasound
Wave intelligence sensor, high-frequency current intelligence sensor and grounding circulation intelligence sensor, each intelligence sensor be separately mounted to by
Cable is surveyed nearby or on tested cable, acquires the fault-signal of tested cable；
The intelligent measurement terminal includes wireless communication apparatus, single-chip data processor, human-computer interaction interface, data storage
Device, power supply and empty sonic transducer；
The wireless communication apparatus is connected with single-chip data processor；
The single-chip data processor receives the data that each intelligence sensor issues, and logarithm by the wireless communication apparatus
According to being analyzed；
The human-computer interaction interface is connected with the single-chip data processor；
The data storage is connected with the single-chip data processor；
The power supply is connected with the wireless communication apparatus and single-chip data processor respectively；
The sky sonic transducer is connected with the single-chip data processor.
2. a kind of multi-functional cable shelf depreciation intelligent inspection tour instrument according to claim 1, which is characterized in that described extra-high
Frequency intelligence sensor, temperature intelligent sensor, infrared imaging intelligence sensor, ultrasonic intelligent sensor, high-frequency current intelligence
Sensor and grounding circulation intelligence sensor include signal picker, signal processor, wireless communication device and probe power,
The signal picker, signal processor and wireless communication device are sequentially connected；The probe power is respectively and at the signal
Reason device is connected with wireless communication device；Wherein:
The signal picker acquires the fault-signal of tested cable, and fault-signal is sent to the signal processor；
The signal processor received fault-signal is filtered and detection processing, and will filtering and detection treated therefore
Barrier signal is converted to digital signal；
The wireless communication device emits digital signal to the intelligent measurement terminal by wireless network；
The probe power is respectively the signal processor and wireless communication device power supply；
The single-chip data processor receives the digital signal of the wireless communication device transmitting by the wireless communication apparatus,
And digital signal is analyzed, obtain amplitude, phase, waveform, pulse and pattern analysis results；
The human-computer interaction interface shows amplitude, phase, waveform, pulse and pattern analysis results, and carries out parameter setting；
The data storage saves test data, and provides corresponding cable information to test data and identify；
The power supply is respectively the wireless communication apparatus and the power supply of single-chip data processor；
The ultrasonic wave that cable local discharge in the sky sonic transducer detection air generates, and ultrasound data is sent to institute
State single-chip data processor.
3. a kind of multi-functional cable shelf depreciation intelligent inspection tour instrument according to claim 1 or 2, which is characterized in that described
Empty sonic transducer is arranged in the shell of the intelligent measurement terminal, and the top being located in the intelligent measurement terminal enclosure；
The sky sonic transducer is using contactless empty sonic transducer；The ultrasonic intelligent sensor uses contact ultrasonic sensing
Device, the sky sonic transducer are used in combination with the ultrasonic intelligent sensor, and the sky sonic transducer and ultrasonic intelligent pass
The ultrasonic signal that sensor measures is recorded and is played by the single-chip data processor.
4. a kind of multi-functional cable shelf depreciation intelligent inspection tour instrument according to claim 1 or 2, which is characterized in that described
Temperature intelligent sensor uses contact type temperature sensor, and the contact type temperature sensor precise measurement is tested cable surface
Point temperature, the temperature results of measurement are sent to the intelligent measurement terminal by wireless network.
5. a kind of multi-functional cable shelf depreciation intelligent inspection tour instrument according to claim 1 or 2, which is characterized in that described
Grounding circulation intelligence sensor is tested the metallic shield grounding current signal of cable, the current signal using current sensor measurement
The intelligent measurement terminal is sent to by wireless network.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110672996A (en) * | 2019-10-12 | 2020-01-10 | 国网江苏省电力有限公司南京供电分公司 | Urban cable multidimensional data integrated live detection device |
| CN110865281A (en) * | 2019-10-22 | 2020-03-06 | 国网江苏省电力有限公司电力科学研究院 | Cable partial discharge detection device and method based on edge calculation |
| CN111077416A (en) * | 2019-12-10 | 2020-04-28 | 云南电网有限责任公司曲靖供电局 | Low-cost ultra-wideband discharge signal detection device and detection method thereof |
| CN112014691A (en) * | 2020-07-10 | 2020-12-01 | 国网安徽省电力有限公司电力科学研究院 | Multi-information fusion partial discharge detection terminal and method under power internet of things |
| CN112563962A (en) * | 2020-11-17 | 2021-03-26 | 国网山东省电力公司济南供电公司 | Unmanned aerial vehicle intelligence system of patrolling and examining in cable tunnel |
| CN112834871A (en) * | 2019-11-25 | 2021-05-25 | 国网江苏省电力有限公司南京供电分公司 | High-voltage long-section cable insulation fault online monitoring system and method |
| CN113625140A (en) * | 2021-08-19 | 2021-11-09 | 山东通广电子有限公司 | Ultrahigh frequency partial discharge intelligent online detector and method |
| CN113848513A (en) * | 2021-09-23 | 2021-12-28 | 全球能源互联网研究院有限公司 | Multifunctional sensor and application method thereof |
| CN114441910A (en) * | 2022-01-28 | 2022-05-06 | 上海格鲁布科技有限公司 | High-precision anti-interference partial discharge live detection device |
| CN116707144A (en) * | 2023-08-07 | 2023-09-05 | 广东佰林电气设备厂有限公司 | Low-voltage distribution box fault early warning method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110672996A (en) * | 2019-10-12 | 2020-01-10 | 国网江苏省电力有限公司南京供电分公司 | Urban cable multidimensional data integrated live detection device |
| CN110865281A (en) * | 2019-10-22 | 2020-03-06 | 国网江苏省电力有限公司电力科学研究院 | Cable partial discharge detection device and method based on edge calculation |
| CN112834871A (en) * | 2019-11-25 | 2021-05-25 | 国网江苏省电力有限公司南京供电分公司 | High-voltage long-section cable insulation fault online monitoring system and method |
| CN111077416A (en) * | 2019-12-10 | 2020-04-28 | 云南电网有限责任公司曲靖供电局 | Low-cost ultra-wideband discharge signal detection device and detection method thereof |
| CN112014691A (en) * | 2020-07-10 | 2020-12-01 | 国网安徽省电力有限公司电力科学研究院 | Multi-information fusion partial discharge detection terminal and method under power internet of things |
| CN112563962A (en) * | 2020-11-17 | 2021-03-26 | 国网山东省电力公司济南供电公司 | Unmanned aerial vehicle intelligence system of patrolling and examining in cable tunnel |
| CN113625140A (en) * | 2021-08-19 | 2021-11-09 | 山东通广电子有限公司 | Ultrahigh frequency partial discharge intelligent online detector and method |
| CN113625140B (en) * | 2021-08-19 | 2024-03-26 | 山东通广电子有限公司 | Ultrahigh frequency partial discharge intelligent online detector and method |
| CN113848513A (en) * | 2021-09-23 | 2021-12-28 | 全球能源互联网研究院有限公司 | Multifunctional sensor and application method thereof |
| CN113848513B (en) * | 2021-09-23 | 2024-02-20 | 全球能源互联网研究院有限公司 | Multifunctional sensor and application method thereof |
| CN114441910A (en) * | 2022-01-28 | 2022-05-06 | 上海格鲁布科技有限公司 | High-precision anti-interference partial discharge live detection device |
| CN116707144A (en) * | 2023-08-07 | 2023-09-05 | 广东佰林电气设备厂有限公司 | Low-voltage distribution box fault early warning method |
| CN116707144B (en) * | 2023-08-07 | 2024-03-19 | 广东佰林电气设备厂有限公司 | Low-voltage distribution box fault early warning method |
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Effective date of registration: 20221011 Address after: Room 207, Block D, Building 11, No. 128, Xiangyin Road, Yangpu District, Shanghai, 200000 Patentee after: Huacheng Electrical Technology Co.,Ltd. Address before: 201112 room 101-B, building 2, 158 Xinjun Ring Road, Minhang District, Shanghai Patentee before: SHANGHAI HUACHENG INTELLIGENT EQUIPMENT CO.,LTD. |
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