CN202066932U - Potable partial-discharge ultrasonic cloud detection device - Google Patents

Potable partial-discharge ultrasonic cloud detection device Download PDF

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Publication number
CN202066932U
CN202066932U CN2011201630880U CN201120163088U CN202066932U CN 202066932 U CN202066932 U CN 202066932U CN 2011201630880 U CN2011201630880 U CN 2011201630880U CN 201120163088 U CN201120163088 U CN 201120163088U CN 202066932 U CN202066932 U CN 202066932U
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China
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signal
server
sensor
ultrasound wave
shelf depreciation
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CN2011201630880U
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Chinese (zh)
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田立斌
周玲
林俊浩
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华南理工大学
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Abstract

The utility model discloses a potable partial-discharge ultrasonic cloud detection device, which comprises an ultrasonic sensor, a temperature sensor, a humidity sensor, an atmospheric pressure sensor, a signal processing module, a wireless network device, a display and earphones. Signals are transmitted to the signal processing module by the sensors, processed signals are transmitted to a cloud server through the wireless network device, the signals are stored into a partial discharge signal characteristic data base after being subject to interference processing and characteristic parameter obtaining, the cloud server analyzes the signals according to historical data in the data base, an operator monitors sound in the earphones and makes diagnosis according to results of the cloud server, the diagnosis results are displayed by means of the display, and detection and alarming can be completed by the device at the same time. By taking advantages of data analyzing, processing and storing capacity of the cloud detection principle, partial discharge in equipment can be early found by monitoring or detecting partial discharge of high voltage equipmenton line, and thereby terrible accidents can be prevented.

Description

Portable PD On-Line ultrasound wave cloud detection device

Technical field

The utility model relates to the high-tension apparatus Partial Discharge Detecting Technology, be specifically related to a kind of Portable PD On-Line ultrasound wave cloud detection device, utilize cloud detection principle, ultrasound examination and ultrasound transfer audio frequency principle, patrol and examine by the shelf depreciation of on-line monitoring high-tension apparatus or to the shelf depreciation of high-tension apparatus, early the discovering device local defect.

Background technology

Along with quick, the steady-state growth of national economy, the develop rapidly of urban construction, enterprise, electricity consumption of resident linearly rise.Be growing more intense in market competition, electric power bought house today in market by seller's market trend, the user is also more and more higher to the requirement of power supply reliability.Yet, in recent years, the breakage of electrical network mesohigh pillar porcelain insulator, ftracture, fracture, electric power transformer insulated deterioration, flashover, puncture, the high voltage bus short circuit, burn, fracture, accidents such as all kinds of switchgears burn, tripping operation happen occasionally, and bring serious harm for the normal operation of electric system and user's personal safety.Shelf depreciation is to cause the major reason of apparatus insulated deterioration and power system accident, also is the important sign of the apparatus insulated situation of reflection.Discover that the electric power accident near 85% is caused that by shelf depreciation therefore the shelf depreciation that the power equipment local defect is caused in time monitors, finds early stability and the reliability of safeguarding Operation of Electric Systems extremely important.

Present existing shelf depreciation ultrasonic detection device mostly carries out on-the-spot intrusive mood monitoring, measures based on industrial computer, and mostly only carry out data analysis and calculate at local discharge signal, and existing experiential fact shows all movable influential to shelf depreciation of the factor of external environment such as temperature, humidity and atmospheric pressure, so this type of Partial Discharge Detection equipment False Rate is higher; In addition, owing to the analyzing and processing of signal data is all carried out in local device, data-handling capacity, the data storage capacity that installs is all had higher requirement, so the data analysis counting yield is limited, hardware cost height and device volume are big and heavy, carry all inconveniences of transportation; Secondly, the edition upgrading frequency height of data processing software has further improved installation cost; And because data and analysis result all are stored in the local device, the situation of loss of data may take place, its security can not get ensureing.

Summary of the invention

The purpose of this utility model is to overcome the above-mentioned shortcoming of prior art, a kind of Portable PD On-Line ultrasound wave cloud detection device is provided, utilize ultrasound examination cloud detection principle, ultrasound examination principle, based on the ultrasound transfer Audiotechnica shelf depreciation of high-tension apparatus being carried out non-intrusion type detects, can in time find the shelf depreciation in the high-tension apparatus, and the operation conditions of grasp high-tension apparatus, the generation of prevention major accident; Adopt a plurality of sensor monitors external environment factors simultaneously, further improved the precision of Partial Discharge Detection.

For achieving the above object, the utility model has adopted following technical scheme:

Portable PD On-Line ultrasound wave cloud detection device, ultrasonic sensor 1, temperature sensor 2, humidity sensor 3 and barometric pressure sensor 4 are connected with signal processing module 5 respectively; Signal processing module 5 comprises prime amplifier 9, wave filter 10, main amplifier 11, AD conversion unit 12, data acquisition unit 13, embedded microprocessor 14, warning device 15, ground unrest voice-grade channel 17, ground unrest and shelf depreciation mixed audio passage 16, selector switch 18 and audio interface 19; Prime amplifier 9, wave filter 10, main amplifier 11, AD conversion unit 12, data acquisition unit 13, embedded microprocessor 14 connect successively; Embedded microprocessor 14 is connected with shelf depreciation mixed audio passage 16 with warning device 15, ground unrest voice-grade channel 17, ground unrest respectively; Ground unrest voice-grade channel 17 is connected with selector switch 18 with shelf depreciation mixed audio passage 16 with ground unrest simultaneously, selector switch 18 is connected with audio interface 19, audio interface 19 is connected with earphone 6, audio-frequency information is delivered in the earphone 6 by audio interface 19, operating personnel are by control selector switch 18, monitor and relatively the sound in ground unrest and shelf depreciation mixed audio passage 16 and the ground unrest voice-grade channel 17 judged whether shelf depreciation unusually.

Ultrasonic sensor (1), temperature sensor (2), humidity sensor (3), barometric pressure sensor (4) are gathered the signal in early stage, this signal is transferred to the high in the clouds server by Wireless Communication Equipment (8) after passing through the pre-service of signal processing module (5) and being converted to digital signal, deposits the local discharge signal property data base in after signal is carried out anti-interference process and extracts characteristic parameter; Sound signal based on the ultrasound wave conversion is manually listened to via earphone (6), the high in the clouds server is made analysis according to the historical data in the local discharge signal property data base, operating personnel make diagnosis in conjunction with the analysis result of sound signal in the earphone (6) and high in the clouds server, and the diagnostic result of high in the clouds server shows by display (7).

The signal that Portable PD On-Line ultrasound wave cloud detection device described in the utility model detects is transferred to the high in the clouds server by Wireless Communication Equipment, after the computational analysis through the high in the clouds server result is returned to device, the processing of data and storage are all carried out in the server beyond the clouds; By the device and the reciprocation of high in the clouds server, obtain and long-range demonstration high in the clouds server in about the analyzing and processing and the diagnostic result of the local discharge signal of equipment, the detection of implement device or warning.

The temperature of temperature sensor measurement operating environment described in the utility model; The relative humidity of described humidity sensor measurement operating environment; The atmospheric pressure of described barometric pressure sensor measuring operation environment.

The utility model also comprises external sensor; Described external sensor comprises absorption ultrasonic detection probe, prolongation microphone, the poly-ripple device of ultrasound wave and parabolic drum sensor; Described absorption ultrasonic detection probe is used to measure the surface local discharge of closed equipment; Described prolongation microphone is used to gather the hole and the local discharge signal in the corner that is difficult to touch; The poly-ripple device of described ultrasound wave is used to gather the local discharge signal that is higher than position, the operating personnel crown; Described parabolic drum sensor is used to gather the ultrasonic signal of cable pole terminal.

Display described in the utility model is a LCD back lingting color display.

The wireless data transmission mode of Wireless Communication Equipment described in the utility model is WIFI or GPRS, and wherein, with interior wireless data transmission, GPRS is fit to the wireless data transmission of detected equipment beyond 90 meters scopes to the suitable detected equipment of WIFI 90 meters scopes.

The utility model by server carry out data processing and storage, determine testing result and the maintenance result, the result is added in the sample database; Set and revise threshold value in server, device is reported to the police when surpassing preset threshold; Point out on LCD display when new shelf depreciation occurring, device was reported to the police when shelf depreciation amplitude or rate of growth were big.

Analyzing and processing and the diagnostic data about apparatus local discharge obtained in the server in network computer described in the utility model and server interaction, realizes that the multi-user browses the shelf depreciation data and is independent of each other.

The principle of work of Portable PD On-Line ultrasound wave cloud detection device described in the utility model is: at first will install near equipment under test, with ultrasonic sensor, temperature sensor, the detected signal of humidity sensor and barometric pressure sensor amplifies through prime amplifier, signal amplifies through main amplifier behind wave filter again, the output signal of main amplifier is delivered to data acquisition unit, the output signal of data acquisition unit flows to server by Wireless Communication Equipment, the data analysis of signal, data processing, fault diagnosis is all carried out in server, in server, the shelf depreciation ultrasonic signal that collects is carried out the time-domain and frequency-domain analysis, extract the parameter that characterizes local discharge characteristic, and in conjunction with the environmental factor temperature that monitors, property data base in humidity and atmospheric pressure and the server compares and draws testing result, and with the type of testing result shelf depreciation, size, the order of severity, discharge frequency and real time temperature, humidity and atmospheric pressure return to the device demonstration and by preset threshold in the server, whether shelf depreciation amplitude and rate of growth decision report to the police; Unite diagnosis according to the result in sound that listens in the earphone and the server, automatically testing result is deposited in the sample database at last.

The utility model compared with prior art has following beneficial effect:

1. can realize online detection, and have small volume and less weight, portable characteristics; Adopt the LCD backlit display screen, and be colored display interface, allow the user to open or close LCD-LIGHT, close backlight and make that the user is easier under sunshine to see the picture demonstration clearly;

2. adopt temperature sensor, humidity sensor and barometric pressure sensor to monitor the variation of external environment factor in real time, and in conjunction with these environmental factor diagnosis shelf depreciation activities, improve the accuracy of Partial Discharge Detection, utilized the cloud detection principle to improve detection efficiency greatly;

3. carry out the diagnostic procedure based on characteristic parameter in server, device is mutual by wireless network or wired mode with server, has reduced the frequency of device edition upgrading, has reduced the cost of device, improves whole system operation efficient;

4. set and revise threshold value in server, device is reported to the police when surpassing threshold value, provides prompting when new shelf depreciation occurring on LCD display, and device was reported to the police when shelf depreciation amplitude or rate of growth were big.Unite diagnosis according to the result in sound that listens in the earphone and the server, reduced False Rate;

5. employing network computer, a plurality of users simultaneously in the browser server about the local discharge signal analyzing and processing and the diagnostic result of equipment, and unaffected mutually;

6. data and result thereof are stored in the server, and data security is guaranteed.

Description of drawings

Fig. 1 is the fundamental diagram of Portable PD On-Line ultrasound wave cloud detection device of the present utility model.

Fig. 2 is the system works schematic diagram of Portable PD On-Line ultrasound wave cloud detection device of the present utility model.

Fig. 3 is the signal processing module concrete structure synoptic diagram of Portable PD On-Line ultrasound wave cloud detection device of the present utility model.

Fig. 4 is the concrete structure and the principle of work synoptic diagram of Portable PD On-Line ultrasound wave cloud detection device of the present utility model.

Embodiment

Below in conjunction with accompanying drawing principle of work of the present utility model and structural principle are described in further detail, but embodiment of the present utility model is not limited only to this.

As shown in Figure 1, Portable PD On-Line ultrasound wave cloud detection device of the present utility model utilizes radio network technique, ultrasonic detection technology and cloud detection principle to detect the shelf depreciation of high-tension apparatus, patrol and examine by the shelf depreciation of on-line monitoring high-tension apparatus or to high-tension apparatus, find the shelf depreciation in the high-tension apparatus early.

As shown in Figure 2, Portable PD On-Line ultrasound wave cloud detection device of the present utility model comprises ultrasonic sensor, temperature sensor, humidity sensor, barometric pressure sensor, signal processing module, Wireless Communication Equipment, earphone and display.

Ultrasonic sensor, temperature sensor, humidity sensor and barometric pressure sensor link to each other with signal processing module, and signal processing module is connected with earphone, wireless data transfer module and display.Ultrasonic sensor, temperature sensor, humidity sensor and barometric pressure sensor are transferred to signal processing module with the signal that receives, the sound signal based on ultrasound transfer that transmits in the artificial monitoring signal processing module of earphone, Wireless Communication Equipment pass to server with the signal that collects and carry out data analysis, data processing and fault diagnosis.In server, the shelf depreciation ultrasonic signal that collects is carried out time-domain and frequency-domain analysis, PRPD spectrum analysis and time frequency analysis, extract the parameter that characterizes local discharge characteristic, and compare in conjunction with the environmental factor temperature, humidity and the atmospheric pressure that monitor and the property data base in the server and to draw testing result, and type, size, the order of severity, discharge frequency and real time temperature, humidity and the atmospheric pressure of testing result shelf depreciation returned to device show and determine whether report to the police by preset threshold, shelf depreciation amplitude and rate of growth in the server.Unite diagnosis according to the result in sound that listens in the earphone and the server, reduce False Rate, automatically testing result is deposited in the sample database at last.Server is connected with network computer is two-way, sends request command by network computer to server, can be on network computer signal analysis and processing result and some information of browser server about shelf depreciation.

As shown in Figure 3, the signal processing module of Portable PD On-Line ultrasound wave cloud detection device of the present utility model comprises prime amplifier, wave filter, main amplifier, AD conversion unit, data acquisition unit, embedded microprocessor, warning device, ground unrest passage, ground unrest and shelf depreciation mixed audio passage, selector switch and audio interface.Wherein prime amplifier, wave filter, main amplifier, AD conversion unit, data acquisition unit and embedded microprocessor are electrically connected mutually successively, embedded microprocessor is connected with shelf depreciation mixed audio passage with warning device, ground unrest voice-grade channel, ground unrest, two voice-grade channels are delivered to audio-frequency information in the earphone by audio interface by selector switch control, operating personnel are by the control selector switch, monitor and relatively the sound in two passages judged whether shelf depreciation unusually.

Prime amplifier input end and ultrasonic sensor, temperature sensor, the output terminal of humidity sensor and barometric pressure sensor connects, signal after prime amplifier will amplify carries out filtering by wave filter, the output terminal of wave filter is connected with the input end of main amplifier, signal after main amplifier will amplify passes to AD conversion unit, data acquisition unit is gathered the digital signal after changing, the signal one tunnel that collects is transferred to and carries out ultrasound wave-sound signal conversion in the embedded microprocessor, sound signal is sent in the earphone by audio interface, and another road signal is input to by radio data-transmission equipment and carries out further analyzing and processing in the server.

Concrete structure of the present utility model and principle of work are as shown in Figure 4.At first will install near equipment under test, with ultrasonic sensor, temperature sensor, the detected signal of humidity sensor and barometric pressure sensor amplifies through prime amplifier, signal amplifies through main amplifier behind wave filter again, the output signal of main amplifier is delivered to data acquisition unit, the output signal of data acquisition unit flows to server by Wireless Communication Equipment, the data analysis of signal, data processing, fault diagnosis is all carried out in server, in server, the shelf depreciation ultrasonic signal that collects is carried out the time-domain and frequency-domain analysis, PRPD spectrum analysis and time frequency analysis, extract the parameter that characterizes local discharge characteristic, and in conjunction with the environmental factor temperature that monitors, property data base in humidity and atmospheric pressure and the server compares and draws testing result, and with the type of testing result shelf depreciation, size, the order of severity, discharge frequency and real time environment temperature, humidity and atmospheric pressure return to the device demonstration and by preset threshold in the server, whether shelf depreciation amplitude and rate of growth decision report to the police.Unite diagnosis according to the result in sound that listens in the earphone and the server, reduce False Rate, automatically testing result is deposited in the sample database at last.

The utility model also comprises external sensor, and embodiment is:

When measurand is closed equipment, can utilize the absorption ultrasonic detection probe to extract ultrasonic signal, this probe head has magnet can be adsorbed on the shelf depreciation of the kind equipment of closed equipment surface measurement such as cable box.The absorption ultrasonic detection probe passes to signal processing module with signal, earphone receives the sound signal based on ultrasound transfer, Wireless Communication Equipment is sent to server with signal after treatment, and server returns diagnostic result the detection alarm that shows and realize shelf depreciation to device.

When the testee distance is far away, can insert external sensor and prolong the microphone received ultrasonic signal, make it arrive the place of safety, to prolong microphone by in the external sense probe access port access device, prolong microphone signal is passed to signal processing module, earphone receives the sound signal based on ultrasound transfer, Wireless Communication Equipment is sent to server with signal after treatment, and server returns diagnostic result the detection alarm that shows and realize shelf depreciation to device.This detection mode sensitivity is the highest, if having air path between sound source and the microphone, then this method can detect the shelf depreciation activity like a bomb.

When the measurand position is higher than the testing staff crown such as the cable pole terminal, can adopt the poly-ripple device of ultrasound wave to extract ultrasonic signal, the poly-ripple device of ultrasound wave is directed at equipment under test, the poly-ripple device of ultrasound wave passes to signal processing module with signal, earphone receives the sound signal based on ultrasound transfer, radio data-transmission equipment is sent to server with signal after treatment, and server returns diagnostic result the detection alarm that shows and realize shelf depreciation to device.

When measurand is the cable pole terminal, can adopt parabolic drum sensor acquisition ultrasonic signal, the parabolic drum inserts external sensor probe access port, the parabolic drum passes to signal processing module with signal, earphone receives the sound signal based on ultrasound transfer, radio data-transmission equipment is sent to server with signal after treatment, and server returns diagnostic result the detection alarm that shows and realize shelf depreciation to device.

The utility model adopts ultrasonic detection technology, radio network technique, based on ultrasound transfer Audiotechnica and cloud detection principle, can realize online detection, and have small volume and less weight, portable characteristics; Utilize the cloud detection principle to improve detection efficiency greatly; A plurality of users simultaneously in the browser server about the local discharge signal analyzing and processing and the diagnostic result of equipment, and unaffected mutually; Carry out the diagnostic procedure based on characteristic parameter in server, device is mutual by wireless network with server, has reduced the frequency of device edition upgrading, reduces the cost of device, improves whole system operation efficient.Data and result thereof are stored in the server, and data security is guaranteed.Unite diagnosis according to the result in sound that listens in the earphone and the server, reduced False Rate.

Claims (8)

1. Portable PD On-Line ultrasound wave cloud detection device is characterized in that ultrasonic sensor (1), temperature sensor (2), humidity sensor (3) and barometric pressure sensor (4) are connected with signal processing module (5) respectively; Signal processing module (5) comprises prime amplifier (9), wave filter (10), main amplifier (11), AD conversion unit (12), data acquisition unit (13), embedded microprocessor (14), warning device (15), ground unrest voice-grade channel (17), ground unrest and shelf depreciation mixed audio passage (16), selector switch (18) and audio interface (19); Prime amplifier (9), wave filter (10), main amplifier (11), AD conversion unit (12), data acquisition unit (13), embedded microprocessor (14) connect successively; Embedded microprocessor (14) is connected with shelf depreciation mixed audio passage (16) with warning device (15), ground unrest voice-grade channel (17), ground unrest respectively; Ground unrest voice-grade channel (17) is connected with selector switch (18) with shelf depreciation mixed audio passage (16) with ground unrest simultaneously, selector switch (18) is connected with audio interface (19), audio interface (19) is connected with earphone (6), audio-frequency information is delivered in the earphone (6) by audio interface (19), operating personnel are by control selector switch (18), monitor and relatively the sound in ground unrest and shelf depreciation mixed audio passage (16) and the ground unrest voice-grade channel (17) judged whether shelf depreciation unusually;
Described ultrasonic sensor (1), temperature sensor (2), humidity sensor (3), barometric pressure sensor (4) are gathered the signal in early stage, this signal is transferred to the high in the clouds server by Wireless Communication Equipment (8) after passing through the pre-service of signal processing module (5) and being converted to digital signal, deposits the local discharge signal property data base in after signal is carried out anti-interference process and extracts characteristic parameter; Sound signal based on the ultrasound wave conversion is manually listened to via earphone (6), the high in the clouds server is made analysis according to the historical data in the local discharge signal property data base, operating personnel make diagnosis in conjunction with the analysis result of sound signal in the earphone (6) and high in the clouds server, and the diagnostic result of high in the clouds server shows by display (7).
2. Portable PD On-Line ultrasound wave cloud detection device according to claim 1, it is characterized in that, the signal that described Portable PD On-Line ultrasound wave cloud detection device detects is transferred to the high in the clouds server by Wireless Communication Equipment, after the computational analysis through the high in the clouds server result is returned to device, the processing of data and storage are all carried out in the server beyond the clouds; By the device and the reciprocation of high in the clouds server, obtain and long-range demonstration high in the clouds server in about the analyzing and processing and the diagnostic result of the local discharge signal of equipment, the detection of implement device or warning.
3. Portable PD On-Line ultrasound wave cloud detection device according to claim 2 is characterized in that the temperature of described temperature sensor measurement operating environment; The relative humidity of described humidity sensor measurement operating environment; The atmospheric pressure of described barometric pressure sensor measuring operation environment.
4. Portable PD On-Line ultrasound wave cloud detection device according to claim 1 is characterized in that, also comprises external sensor; Described external sensor comprises absorption ultrasonic detection probe, prolongation microphone, the poly-ripple device of ultrasound wave and parabolic drum sensor; Described absorption ultrasonic detection probe is used to measure the surface local discharge of closed equipment; Described prolongation microphone is used to gather the hole and the local discharge signal in the corner that is difficult to touch; The poly-ripple device of described ultrasound wave is used to gather the local discharge signal that is higher than position, the operating personnel crown; Described parabolic drum sensor is used to gather the ultrasonic signal of cable pole terminal.
5. according to the described Portable PD On-Line ultrasound wave of one of claim 1 ~ 4 cloud detection device, it is characterized in that described display is a LCD back lingting color display.
6. Portable PD On-Line ultrasound wave cloud detection device according to claim 5, it is characterized in that, the wireless data transmission mode of described Wireless Communication Equipment is WIFI or GPRS, wherein, with interior wireless data transmission, GPRS is fit to the wireless data transmission of detected equipment beyond 90 meters scopes to the suitable detected equipment of WIFI 90 meters scopes.
7. Portable PD On-Line ultrasound wave cloud detection device according to claim 1 is characterized in that, by server carry out data processing and storage, determine testing result and the maintenance result, the result is added in the sample database; Set and revise threshold value in server, device is reported to the police when surpassing preset threshold; Point out on LCD display when new shelf depreciation occurring, device was reported to the police when shelf depreciation amplitude or rate of growth were big.
8. Portable PD On-Line ultrasound wave cloud detection device according to claim 1, it is characterized in that, analyzing and processing and the diagnostic data about apparatus local discharge obtained in the server in network computer and server interaction, realizes that the multi-user browses the shelf depreciation data and is independent of each other.
CN2011201630880U 2011-05-20 2011-05-20 Potable partial-discharge ultrasonic cloud detection device CN202066932U (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102298107A (en) * 2011-05-20 2011-12-28 华南理工大学 Portable ultrasonic wave and cloud detection apparatus for partial discharge
CN103169495A (en) * 2012-12-06 2013-06-26 广州丰谱信息技术有限公司 Monitoring method and monitoring device of movable ultrasonic image with high resolution
CN103365755A (en) * 2012-03-27 2013-10-23 台达电子工业股份有限公司 Host monitoring and exception handling method for cloud side system
CN105699790A (en) * 2016-01-27 2016-06-22 国家电网公司 A high-voltage transmission line audible discharge noise monitoring device
CN105891682A (en) * 2016-06-27 2016-08-24 国网山东省电力公司济南供电公司 Novel small-current grounding line selection system
CN106249114A (en) * 2016-08-23 2016-12-21 上海华乘智能设备有限公司 Multifunctional belt electric detection means based on WIFI transmission and method
CN106950480A (en) * 2017-04-28 2017-07-14 上海欧忆能源科技有限公司 The online qualitative checking method of power equipment shelf depreciation, system and equipment
CN110324741A (en) * 2019-06-28 2019-10-11 深圳供电局有限公司 Test earphone and its wearable detection device
CN110738334A (en) * 2019-10-21 2020-01-31 邹威 multi-platform information interaction electric power safety production management system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102298107A (en) * 2011-05-20 2011-12-28 华南理工大学 Portable ultrasonic wave and cloud detection apparatus for partial discharge
CN103365755A (en) * 2012-03-27 2013-10-23 台达电子工业股份有限公司 Host monitoring and exception handling method for cloud side system
CN103169495A (en) * 2012-12-06 2013-06-26 广州丰谱信息技术有限公司 Monitoring method and monitoring device of movable ultrasonic image with high resolution
CN105699790A (en) * 2016-01-27 2016-06-22 国家电网公司 A high-voltage transmission line audible discharge noise monitoring device
CN105891682A (en) * 2016-06-27 2016-08-24 国网山东省电力公司济南供电公司 Novel small-current grounding line selection system
CN105891682B (en) * 2016-06-27 2019-01-29 国网山东省电力公司济南供电公司 A kind of novel Little Current Ground Connection System
CN106249114A (en) * 2016-08-23 2016-12-21 上海华乘智能设备有限公司 Multifunctional belt electric detection means based on WIFI transmission and method
CN106950480A (en) * 2017-04-28 2017-07-14 上海欧忆能源科技有限公司 The online qualitative checking method of power equipment shelf depreciation, system and equipment
CN110324741A (en) * 2019-06-28 2019-10-11 深圳供电局有限公司 Test earphone and its wearable detection device
CN110738334A (en) * 2019-10-21 2020-01-31 邹威 multi-platform information interaction electric power safety production management system

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