CN105587463A - Remote monitoring method of wind power generation - Google Patents

Remote monitoring method of wind power generation Download PDF

Info

Publication number
CN105587463A
CN105587463A CN201410559283.3A CN201410559283A CN105587463A CN 105587463 A CN105587463 A CN 105587463A CN 201410559283 A CN201410559283 A CN 201410559283A CN 105587463 A CN105587463 A CN 105587463A
Authority
CN
China
Prior art keywords
wind
sensor
signal
circuit
layer subsystem
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410559283.3A
Other languages
Chinese (zh)
Inventor
周晓丽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Kuoli Mechanical and Electrical Technology Co Ltd
Original Assignee
Xian Kuoli Mechanical and Electrical Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xian Kuoli Mechanical and Electrical Technology Co Ltd filed Critical Xian Kuoli Mechanical and Electrical Technology Co Ltd
Priority to CN201410559283.3A priority Critical patent/CN105587463A/en
Publication of CN105587463A publication Critical patent/CN105587463A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction

Landscapes

  • Wind Motors (AREA)

Abstract

The invention discloses a remote monitoring method of wind power generation. The remote monitoring method comprises following steps of: 1, establishing wireless communication between a perception layer subsystem and a transmission layer subsystem and between the transmission layer subsystem and a management level subsystem via a GPRS network; 2, sensing and collecting wind turbine generator and wind power plant environment parameters by the sensing layer subsystem; 3, remotely and wirelessly transmitting signals sensed and collected on the spot by the transmission layer subsystem; 4, integrally managing and issuing signals of the sensing layer subsystem acquired by the management level subsystem; and 5, making failure diagnoses and alarming. The remote monitoring method of wind power generation has following beneficial effects: the remote monitoring method is easy and convenient at low investment cost; by adoption of Internet of Things technology, real-time acquisition and remote monitoring of multiple parameters of the wind generating set and the wind power plant are carried out; features of rapid data transmission speed, easy function expandability and great self-organization of network and self-healing performance are obtained; and problems of an existing monitoring system such as inconvenient wiring, weak remote communication capability and high running cost are effectively overcome.

Description

A kind of long-distance monitoring method of wind-power electricity generation
Technical field
The present invention relates to a kind of method for supervising, especially relate to a kind of long-distance monitoring method of wind-power electricity generation.
Background technology
Wind energy, as the reproducible clean energy resource of one, is more and more subject to the attention of countries in the world. Cut-offIn the end of the year 2008, China's accumulative total is installed more than 11600 of wind-powered electricity generation unit, the about 12.15GW of installation scale. ManyInstitute is known, and wind energy turbine set is located in an outlying district conventionally, and running environment is poor, and maintenance difficulties is large, for ensureing windElectric field stable operation, just need to have the monitoring system of perfect performance. Each large wind field monitoring system also at presentAdopt traditional wired collection and transmission. Because the monitoring of blower fan needs both-way communication, adopt just wiredMean blower fan sensor to collection center, collection center is to altogether needing four between central control roomLine. This not only wiring workload for the more wind field of blower fan increases, and the more important thing is and is subject to environmentImpact, cable is easily out of order, and manually investigates and reparation is a large problem, and this also directly causes inputThe raising of cost and operation cost, wherein the safety and stablization of communication be all each strong wind place face straightConnect challenge.
Along with the development of technology of Internet of things, it is obtaining reality aspect industrialization, informationization and automationThe application of matter. Therefore, invent a kind of based on technology of Internet of things and can carry out on the spot the prison of processing in real timeSurvey method has important Research Significance and practical value.
Summary of the invention
Technical problem to be solved by this invention is, for above-mentioned deficiency of the prior art, to provide oneThe long-distance monitoring method of planting wind-power electricity generation, can utilize microprocessor to be just located in on-site signalReason, is then sent to remote monitoring center by wireless network by result, efficiently solves existingThe problems such as monitoring system wiring inconvenience, telecommunication capabilities is weak, operation cost is high.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of wind-power electricity generation long-rangeMethod for supervising, is characterized in that, comprises the following steps:
Step 1, establishes a communications link: between sensing layer subsystem and transport layer subsystem and transmissionBetween straton systems and management straton system, all carry out radio communication by GPRS network, described perceptionStraton system, transport layer subsystem and management level subsystem are provided with GPRS communication module; DescribedSensing layer subsystem comprises sensor unit, analog switching circuit, signal isolation circuit, signal conditionCircuit, gain control circuit, A/D change-over circuit and 3G video camera, described analog switching circuit, letterNumber buffer circuit, signal conditioning circuit, gain control circuit and A/D change-over circuit join successively, instituteState sensor unit comprise velocity sensor, vibrating sensor, sound transducer, temperature sensor,Wind sensor, variable-frequency power sensor and respectively with variable-frequency power sensor and analog switching circuitThe secondary meter joining, the sensor all joins with analog switching circuit; Described transport layer subsystemComprise processor, video compressing module and alarm module, described video compressing module and alarm module are equalJoin with processor; Described management level subsystem comprises the communication server, data server and monitoring masterMachine, the described communication server and data server all join with monitoring host computer;
Step 2, sensing layer subsystem to wind-powered electricity generation unit parameter and wind energy turbine set ambient parameter carry out perception andGather, comprise following mode:
Velocity sensor detects in real time to rotation speed of fan;
Variable-frequency power sensor is sampled to the voltage and current of blower fan, and secondary meter is to described voltageCalculate with the sampled value of electric current, to obtain voltage effective value, current effective value, active power etc.Parameter;
Vibration Condition when vibrating sensor is worked to blower fan detects in real time;
The noise situations that sound transducer sends when blower fan is worked detects in real time;
Wind sensor detects in real time to the wind-force of wind energy turbine set;
Temperature sensor detects in real time to the environment temperature of wind energy turbine set;
3G video camera carries out video capture to running of wind generating set situation, and will take by 3G networkTo video information radio to video compressing module;
Analog switching circuit is pressed a constant switching frequency by velocity sensor, variable-frequency power sensor, vibrationThe signal that sensor, sound transducer, wind sensor and temperature sensor detect is through signal isolation electricityRoad is transferred to signal conditioning circuit;
Signal conditioning circuit by the signal receiving once amplify, linearisation and filtering passes after processingBe defeated by gain control circuit;
Gain control circuit carries out the signal receiving to be transferred to A/D change-over circuit after secondary amplification;
A/D change-over circuit converts after data signal the analog signal receiving through GPRS communication mould toPiece and GPRS network radio to described processor;
Described velocity sensor, variable-frequency power sensor, vibrating sensor, sound transducer, wind-forceSensor and temperature sensor all join with analog switching circuit;
Step 3, transport layer subsystem carries out wireless remote biography to on-the-spot perception and the signal that collectsDefeated, specifically comprise: the video information receiving is transferred to after compression described place by video compressing moduleReason device; The signal that processor transmits A/D change-over circuit and described video compress signal be encoded,After modulation, spread processing, give the described communication server through GPRS network remote transmission;
Step 4, the signal that management level subsystem obtains sensing layer subsystem carries out integrated management and sends outCloth, specifically comprises: the communication server has route, gateway and modulation /demodulation function, is responsible for described placeThe information interaction of reason device and monitoring host computer; Monitoring host computer carries out access and demonstration to the information receiving,And according to the historical data in the data of real-time perception and data server, sensing layer subsystem is sentCorresponding control command;
Step 5, fault diagnosis and warning: described processor to the received signal with corresponding signal thresholdValue compares, if arbitrary signal exceeds threshold range, drives described alarm module to send alarm signalNumber.
The long-distance monitoring method of above-mentioned a kind of wind-power electricity generation, is characterized in that: described processor is that ARM is micro-Processor.
The long-distance monitoring method of above-mentioned a kind of wind-power electricity generation, is characterized in that: in described video compressing moduleBe equipped with 3G communication module.
The long-distance monitoring method of above-mentioned a kind of wind-power electricity generation, is characterized in that: described analog switching circuitSwitching frequency is 100HZ.
The long-distance monitoring method of above-mentioned a kind of wind-power electricity generation, is characterized in that: described GPRS communication moduleFor DATA-6121 low-consumption wireless module.
The present invention compared with prior art has the following advantages: simple and convenient, input cost is low; UtilizeTechnology of Internet of things has been realized multiple parameters of wind power generating set and wind energy turbine set environment has been carried out in real timeGather and remote monitoring, have that message transmission rate is fast, an easily expansion of function, self-organization of network, self-healingThe features such as ability is strong, efficiently solve that existing monitoring system wiring inconvenience, telecommunication capabilities are weak, fortuneBattalion's high in cost of production problem.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Brief description of the drawings
Fig. 1 is flow chart of the present invention.
Detailed description of the invention
As shown in Figure 1, the present invention includes following steps:
Step 1, establishes a communications link: between sensing layer subsystem and transport layer subsystem and transmissionBetween straton systems and management straton system, all carry out radio communication by GPRS network, described perceptionStraton system, transport layer subsystem and management level subsystem are provided with GPRS communication module; DescribedSensing layer subsystem comprises sensor unit, analog switching circuit, signal isolation circuit, signal conditionCircuit, gain control circuit, A/D change-over circuit and 3G video camera, described analog switching circuit, letterNumber buffer circuit, signal conditioning circuit, gain control circuit and A/D change-over circuit join successively, instituteState sensor unit comprise velocity sensor, vibrating sensor, sound transducer, temperature sensor,Wind sensor, variable-frequency power sensor and respectively with variable-frequency power sensor and analog switching circuitThe secondary meter joining, the sensor all joins with analog switching circuit; Described transport layer subsystemComprise processor, video compressing module and alarm module, described video compressing module and alarm module are equalJoin with processor; Described management level subsystem comprises the communication server, data server and monitoring masterMachine, the described communication server and data server all join with monitoring host computer;
Step 2, sensing layer subsystem to wind-powered electricity generation unit parameter and wind energy turbine set ambient parameter carry out perception andGather, comprise following mode:
Velocity sensor detects in real time to rotation speed of fan;
Variable-frequency power sensor is sampled to the voltage and current of blower fan, and secondary meter is to described voltageCalculate with the sampled value of electric current, to obtain voltage effective value, current effective value, active power etc.Parameter;
Vibration Condition when vibrating sensor is worked to blower fan detects in real time;
The noise situations that sound transducer sends when blower fan is worked detects in real time;
Wind sensor detects in real time to the wind-force of wind energy turbine set;
Temperature sensor detects in real time to the environment temperature of wind energy turbine set;
3G video camera carries out video capture to running of wind generating set situation, and will take by 3G networkTo video information radio to video compressing module;
Analog switching circuit is pressed a constant switching frequency by velocity sensor, variable-frequency power sensor, vibrationThe signal that sensor, sound transducer, wind sensor and temperature sensor detect is through signal isolation electricityRoad is transferred to signal conditioning circuit;
Signal conditioning circuit by the signal receiving once amplify, linearisation and filtering passes after processingBe defeated by gain control circuit;
Gain control circuit carries out the signal receiving to be transferred to A/D change-over circuit after secondary amplification;
A/D change-over circuit converts after data signal the analog signal receiving through GPRS communication mould toPiece and GPRS network radio to described processor;
Described velocity sensor, variable-frequency power sensor, vibrating sensor, sound transducer, wind-forceSensor and temperature sensor all join with analog switching circuit;
Step 3, transport layer subsystem carries out wireless remote biography to on-the-spot perception and the signal that collectsDefeated, specifically comprise: the video information receiving is transferred to after compression described place by video compressing moduleReason device; The signal that processor transmits A/D change-over circuit and described video compress signal be encoded,After modulation, spread processing, give the described communication server through GPRS network remote transmission;
Step 4, the signal that management level subsystem obtains sensing layer subsystem carries out integrated management and sends outCloth, specifically comprises: the communication server has route, gateway and modulation /demodulation function, is responsible for described placeThe information interaction of reason device and monitoring host computer; Monitoring host computer carries out access and demonstration to the information receiving,And according to the historical data in the data of real-time perception and data server, sensing layer subsystem is sentCorresponding control command;
Step 5, fault diagnosis and warning: described processor to the received signal with corresponding signal thresholdValue compares, if arbitrary signal exceeds threshold range, drives described alarm module to send alarm signalNumber.
In the present embodiment, described processor is ARM microprocessor.
In the present embodiment, described video compressing module is built-in with 3G communication module.
In the present embodiment, the switching frequency of described analog switching circuit is 100HZ.
In the present embodiment, described GPRS communication module is DATA-6121 low-consumption wireless module.
The above, be only preferred embodiment of the present invention, not the present invention imposed any restrictions, everyAny simple modification, change and the equivalent structure above embodiment done according to the technology of the present invention essenceChange, all still belong in the protection domain of technical solution of the present invention.

Claims (5)

1. a long-distance monitoring method for wind-power electricity generation, is characterized in that, comprises the following steps:
Step 1, establishes a communications link: between sensing layer subsystem and transport layer subsystem and transmissionBetween straton systems and management straton system, all carry out radio communication by GPRS network, described perceptionStraton system, transport layer subsystem and management level subsystem are provided with GPRS communication module; DescribedSensing layer subsystem comprises sensor unit, analog switching circuit, signal isolation circuit, signal conditionCircuit, gain control circuit, A/D change-over circuit and 3G video camera, described analog switching circuit, letterNumber buffer circuit, signal conditioning circuit, gain control circuit and A/D change-over circuit join successively, instituteState sensor unit comprise velocity sensor, vibrating sensor, sound transducer, temperature sensor,Wind sensor, variable-frequency power sensor and respectively with variable-frequency power sensor and analog switching circuitThe secondary meter joining, the sensor all joins with analog switching circuit; Described transport layer subsystemComprise processor, video compressing module and alarm module, described video compressing module and alarm module are equalJoin with processor; Described management level subsystem comprises the communication server, data server and monitoring masterMachine, the described communication server and data server all join with monitoring host computer;
Step 2, sensing layer subsystem to wind-powered electricity generation unit parameter and wind energy turbine set ambient parameter carry out perception andGather, comprise following mode:
Velocity sensor detects in real time to rotation speed of fan;
Variable-frequency power sensor is sampled to the voltage and current of blower fan, and secondary meter is to described voltageCalculate with the sampled value of electric current, to obtain voltage effective value, current effective value, active power etc.Parameter;
Vibration Condition when vibrating sensor is worked to blower fan detects in real time;
The noise situations that sound transducer sends when blower fan is worked detects in real time;
Wind sensor detects in real time to the wind-force of wind energy turbine set;
Temperature sensor detects in real time to the environment temperature of wind energy turbine set;
3G video camera carries out video capture to running of wind generating set situation, and will take by 3G networkTo video information radio to video compressing module;
Analog switching circuit is pressed a constant switching frequency by velocity sensor, variable-frequency power sensor, vibrationThe signal that sensor, sound transducer, wind sensor and temperature sensor detect is through signal isolation electricityRoad is transferred to signal conditioning circuit;
Signal conditioning circuit by the signal receiving once amplify, linearisation and filtering passes after processingBe defeated by gain control circuit;
Gain control circuit carries out the signal receiving to be transferred to A/D change-over circuit after secondary amplification;
A/D change-over circuit converts after data signal the analog signal receiving through GPRS communication mould toPiece and GPRS network radio to described processor;
Described velocity sensor, variable-frequency power sensor, vibrating sensor, sound transducer, wind-forceSensor and temperature sensor all join with analog switching circuit;
Step 3, transport layer subsystem carries out wireless remote biography to on-the-spot perception and the signal that collectsDefeated, specifically comprise: the video information receiving is transferred to after compression described place by video compressing moduleReason device; The signal that processor transmits A/D change-over circuit and described video compress signal be encoded,After modulation, spread processing, give the described communication server through GPRS network remote transmission;
Step 4, the signal that management level subsystem obtains sensing layer subsystem carries out integrated management and sends outCloth, specifically comprises: the communication server has route, gateway and modulation /demodulation function, is responsible for described placeThe information interaction of reason device and monitoring host computer; Monitoring host computer carries out access and demonstration to the information receiving,And according to the historical data in the data of real-time perception and data server, sensing layer subsystem is sentCorresponding control command;
Step 5, fault diagnosis and warning: described processor to the received signal with corresponding signal thresholdValue compares, if arbitrary signal exceeds threshold range, drives described alarm module to send alarm signalNumber.
2. according to the long-distance monitoring method of a kind of wind-power electricity generation claimed in claim 1, it is characterized in that:Described processor is ARM microprocessor.
3. according to the long-distance monitoring method of a kind of wind-power electricity generation described in claim 1 or 2, its featureBe: described video compressing module is built-in with 3G communication module.
4. according to the long-distance monitoring method of a kind of wind-power electricity generation described in claim 1 or 2, its featureBe: the switching frequency of described analog switching circuit is 100HZ.
5. according to the long-distance monitoring method of a kind of wind-power electricity generation described in claim 1 or 2, its featureBe: described GPRS communication module is DATA-6121 low-consumption wireless module.
CN201410559283.3A 2014-10-18 2014-10-18 Remote monitoring method of wind power generation Pending CN105587463A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410559283.3A CN105587463A (en) 2014-10-18 2014-10-18 Remote monitoring method of wind power generation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410559283.3A CN105587463A (en) 2014-10-18 2014-10-18 Remote monitoring method of wind power generation

Publications (1)

Publication Number Publication Date
CN105587463A true CN105587463A (en) 2016-05-18

Family

ID=55927300

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410559283.3A Pending CN105587463A (en) 2014-10-18 2014-10-18 Remote monitoring method of wind power generation

Country Status (1)

Country Link
CN (1) CN105587463A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106324324A (en) * 2016-08-12 2017-01-11 株洲中车时代电气股份有限公司 Method and device for calculating effective value of terminal voltage of generator
CN106762406A (en) * 2017-01-24 2017-05-31 深圳企管加企业服务有限公司 A kind of Wind turbines monitoring method and system based on Internet of Things
CN107613013A (en) * 2017-09-27 2018-01-19 广州威能机电有限公司 Intelligent power cloud system based on Internet of Things
CN107701371A (en) * 2017-09-06 2018-02-16 合肥凌山新能源科技有限公司 A kind of power-generating control system of multi fan wind power generating set
CN108848168A (en) * 2018-06-21 2018-11-20 山东固源信息科技有限公司 A kind of fan monitoring alarm system
CN109779845A (en) * 2017-11-15 2019-05-21 观为监测技术无锡股份有限公司 Wind power generating set signal acquisition circuit
CN111075662A (en) * 2019-12-31 2020-04-28 国网山东省电力公司临沂供电公司 Online monitoring system of offshore wind power generation system
CN111145501A (en) * 2018-11-02 2020-05-12 上海逗闷网络科技有限公司 Internet of things routing sharing system based on industrial equipment
CN111766557A (en) * 2020-05-31 2020-10-13 宁夏隆基宁光仪表股份有限公司 Method for analyzing influence on detection precision of electric energy meter based on K-Means algorithm
CN113503229A (en) * 2021-08-02 2021-10-15 北京京能清洁能源电力股份有限公司北京分公司 Wind power monitoring system and method
CN113654587A (en) * 2021-07-02 2021-11-16 上海电机学院 Wind-powered electricity generation field environmental data monitoring devices
CN118733975A (en) * 2024-09-04 2024-10-01 山东特检科技有限公司 Port equipment vibration signal filtering method and system

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106324324A (en) * 2016-08-12 2017-01-11 株洲中车时代电气股份有限公司 Method and device for calculating effective value of terminal voltage of generator
CN106762406A (en) * 2017-01-24 2017-05-31 深圳企管加企业服务有限公司 A kind of Wind turbines monitoring method and system based on Internet of Things
CN107701371A (en) * 2017-09-06 2018-02-16 合肥凌山新能源科技有限公司 A kind of power-generating control system of multi fan wind power generating set
CN107613013A (en) * 2017-09-27 2018-01-19 广州威能机电有限公司 Intelligent power cloud system based on Internet of Things
CN109779845A (en) * 2017-11-15 2019-05-21 观为监测技术无锡股份有限公司 Wind power generating set signal acquisition circuit
CN108848168A (en) * 2018-06-21 2018-11-20 山东固源信息科技有限公司 A kind of fan monitoring alarm system
CN111145501A (en) * 2018-11-02 2020-05-12 上海逗闷网络科技有限公司 Internet of things routing sharing system based on industrial equipment
CN111075662A (en) * 2019-12-31 2020-04-28 国网山东省电力公司临沂供电公司 Online monitoring system of offshore wind power generation system
CN111766557A (en) * 2020-05-31 2020-10-13 宁夏隆基宁光仪表股份有限公司 Method for analyzing influence on detection precision of electric energy meter based on K-Means algorithm
CN113654587A (en) * 2021-07-02 2021-11-16 上海电机学院 Wind-powered electricity generation field environmental data monitoring devices
CN113503229A (en) * 2021-08-02 2021-10-15 北京京能清洁能源电力股份有限公司北京分公司 Wind power monitoring system and method
CN118733975A (en) * 2024-09-04 2024-10-01 山东特检科技有限公司 Port equipment vibration signal filtering method and system

Similar Documents

Publication Publication Date Title
CN105587463A (en) Remote monitoring method of wind power generation
CN203532160U (en) Wind power generation remote monitoring system based on internet of things
KR101943636B1 (en) Smart RTU to support next generation IoT
CN201803742U (en) On-line monitoring device for icing of transmission lines
CN102541042B (en) Internet-of-things (IOT)-based monitoring system and monitoring method for off-grid small wind power plant
CN202928616U (en) Transmission line conducting wire icing and galloping on-line monitoring system
CN104950769A (en) Intelligent electrical equipment environment monitoring system based on cloud computing and big data analysis
CN102590893A (en) Intelligent microclimate monitoring system of transmission lines
CN101915889B (en) Conductor sag on-line monitoring system
CN203673317U (en) Fan condition monitoring system
CN104514683A (en) Remote wind power generation monitoring system based on Internet of Things
CN103306897A (en) Wireless monitoring device and wireless monitoring system applicable to wind power generator
CN104344901A (en) Temperature monitoring early warning system of transformer substation high voltage switch cabinet
CN105590438A (en) Wireless data collection system based on remote control and data compression
CN204155435U (en) A kind of wireless temperature acquisition system
CN205005190U (en) Fan system of patrolling and examining
CN203480279U (en) Centralized monitoring system for communication box body
CN103296749B (en) The processing method of a kind of power grid state information based on wireless sense network and system
CN211148776U (en) Current acquisition device and current monitoring system
CN111555461A (en) Intelligent diagnosis system and judgment method for safety and health degree of photovoltaic power station
CN203274791U (en) Remote on-line state detection system of high-tension transmission line
CN216144371U (en) Power supply running state monitoring device
CN204301773U (en) A kind of wind-driven generator on-Line Monitor Device
CN204082446U (en) Based on the offshore wind farm unit comprehensive monitoring system of 6LoWPAN radio sensing network
CN203911580U (en) Remote intelligent environment monitoring alarm device for electric power equipment

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20160518