Based on the cable intermediate joint temperature online monitoring system of mist computing technique
The utility model relates to a kind of cable intermediate joint temperature online monitoring system based on mist computing technique, belongs to cable temperature monitoring technical field.
Cable splice is also known as cable end.After cable laying is good, in order to become a continuous print circuit, each section of line must connect as a whole, and these tie points are just called cable splice.The cable splice of cable line middle part is called intermediate head, and the cable splice of circuit two end is called terminals.Cable splice is used to locking and fixing line, plays the effect of water proof and dust proof against shock.Its Main Function makes circuit unobstructed, makes cable keep sealing, and ensure the class of insulation at cable splice place, make it run safely and reliably.If poor sealing, not only can leakage of oil cause oil-paper to dry up, and moisture also can invade cable inside, makes paper insulation hydraulic performance decline.
Intermediate head is the weak link on power cable line, easily in operational process, produces local overheating.Therefore, on-line monitoring carries out to its temperature most important.The on-line monitoring of Joint Temperature needs accurately, in real time, online to record temperature data.By real time temperature and historical temperature, not only insulation ag(e)ing situation, local hot spot be can judge, Timeliness coverage potential safety hazard, reliability, stability, the economy of Operation of Electric Systems ensured; More can provide foundation for electricity consumption power cable capacity dynamic compatibilization.
Power cable line there will be an intermediate head every about 500m, and because cable installation mode is various, line range wide, this causes difficulty to intermediate head on-line temperature monitoring.Along with sensor technology, the developing rapidly of the communication technology, by the various new technology of Integrated comparative, have complementary advantages, for the shortcoming of existing temp measuring system, to design and to research and develop a set of more optimal Power Cable Joint Temperature In-Line Temperature Measure System significant.
In order to reduce the burden of bottom data acquisition terminal, generally the data that sensor detects can be uploaded to cloud server in real time, then according to the data of cloud server, cable practical operation situation be analyzed.But, cloud computing is applied to On-line Monitor System for Cable Joint Temperature and can produce a lot of problem.First, because the quantity of cable line intermediate head is more, multi circuit transmission lines needs the data point of detection more, if data are uploaded to high in the clouds may cause data congestion simultaneously, high in the clouds can not be upload the data in time.The situations such as delayed alarm will be caused like this.Secondly, the prerequisite of cloud computing upload the data to high in the clouds, otherwise cannot complete data processing and analysis.In order to address these problems, the utility model utilizes digital temperature sensor, and propose a kind of cable intermediate joint temperature online monitoring system based on mist computing technique, this system has reliable communications, cost is low, and precision is high, and antijamming capability is strong, easy installation, the life-span is long, can the advantage such as on-line monitoring.
Utility model content
The utility model technical issues that need to address are for the deficiencies in the prior art, propose a kind of cable intermediate joint temperature online monitoring system based on mist computing technique, have good stability, temperature measurement accuracy is high, and cost is low, easily installs, life-span is long, easy to use, can the advantage such as on-line monitoring.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
Based on a cable intermediate joint temperature online monitoring system for mist computing technique, it is characterized in that: the some terminal nodes comprise some Centroids, communicate to connect with Centroid, the GPRS network communicated to connect with all Centroids, and the data management platform that communicates to connect of GPRS network;
Each terminal node includes intermediate head on cable, cable, temperature sensor, data acquisition module, wireless transmitter module and draw-out power supply administration module, and intermediate head comprises prefabricated component and is arranged on the containment vessel of prefabricated component outside;
Body conductor sensor on the conductor that temperature sensor comprises joint conductor sensor on the conductor of the cable be arranged in prefabricated component, be arranged on outside prefabricated component, be arranged on cable supracutaneous body epidermis sensor, be arranged on prefabricated component supracutaneous joint epidermis sensor, be arranged on containment vessel supracutaneous containment vessel epidermis sensor, be arranged on environment temperature sensor outside containment vessel, above-mentioned all temperature sensors are all connected with data acquisition module; Joint conductor sensor is the built-in wireless passive temperature sensor in circular ring type structure, and the major diameter fit of the internal diameter of circular ring type joint conductor sensor and the conductor of cable is also socketed on the conductor in prefabricated component;
Draw-out power supply administration module comprises that get can coil and with get can the power management module that is connected of coil, power management module comprise be electrically connected successively protection circuit, current rectifying and wave filtering circuit, getting can power control circuit and voltage-stabilizing output circuit, get and can be arranged on cable by coil, get and can also be connected with accumulator by power control circuit, the output terminal of protection circuit also with get energy power control circuit and be connected;
Input end connection data acquisition module, the output terminal of wireless transmitter module connect Centroid.
The further improvement of technical solutions of the utility model is: described Centroid comprises the draw-out power supply, Centroid module, data processing module and the GPRS transmitter module that connect successively, the wireless transmitter module of Centroid module and terminal node communicates to connect, and GPRS transmitter module is communicated to connect by GPRS network and data management platform.
The further improvement of technical solutions of the utility model is: described data management platform comprises the server of built-in temp measuring system software, and this server is communicated to connect by the GPRS transmitter module of GPRS network and Centroid.
The further improvement of technical solutions of the utility model is: also comprise warning horn, and warning horn is communicated to connect by the GPRS transmitter module of GPRS network and Centroid.
The further improvement of technical solutions of the utility model is: environment temperature sensor distance protection shell 0.2m ~ 2m.
The further improvement of technical solutions of the utility model is: containment vessel epidermis sensor is two, is arranged symmetrically in the containment vessel two ends of intermediate head.
The further improvement of technical solutions of the utility model is: getting coil to be bayonet-like structures.
The further improvement of technical solutions of the utility model is: data acquisition module and wireless transmitter module are ZigBee communication.
The further improvement of technical solutions of the utility model is: Centroid module is also ZigBee communication.
Owing to have employed technique scheme, the technical progress that the utility model obtains is: the utility model has good stability, and temperature measurement accuracy is high, and cost is low, easily installs, and the life-span is long, easy to use, can the advantage such as on-line monitoring.
(1) make use of ZigBee wireless networking function, integrated data collector and ZigBee wireless transmitter module, form the temperature acquisition system of little, the reliable communications of volume, low-power consumption.In actual cable laying state, can the limited space of installation data acquisition system, therefore the utility model can adapt to site environment well.
(2) make use of novel mist computational grid, by the edge of network calculations from the Center Extender of network to network.This network has the advantage of low delay and location aware, has geographic distribution more widely and wider movability simultaneously, and the multinode be adapted on cable line is measured.Data transmission is carried out by utilizing ZigBee between terminal node, carry out processing and calculating when data are transferred to Centroid, the data separate ZigBee the most at last after process turns GPRS gateway and data is transferred to server in data management platform by GPRS network again.The utility model comprehensive utilization mist computational grid and system for cloud computing, can be applicable to the on-line temperature monitoring field of underground cable.
(3) temperature sensor is arranged on intermediate head inside; accurate distribution form distributes multiple measuring point; Real-Time Monitoring intermediate head internal temperature; inner thermometric more early, more accurately can find insulation defect position; thermometric is affected by environment little simultaneously, is conducive to accurate calculating conductor temperature value, in addition temperature sensor is arranged on intermediate head inside and it can be protected from water soaking; increase the service life, ensure temperature measurement accuracy.
(4) data transfer mode that combines of ZigBee and GPRS, ZigBee has the advantages such as low-power consumption, automatic network-building, free communication in short range wireless transmission, be applicable to composition radio sensing network, GPRS realizes seamless coverage substantially in city, be applicable to remote wireless transmission, ZigBee and GPRS combines, and both have complementary advantages, and can be applicable to the on-line temperature monitoring field of underground power cable.
(5) get and can be designed to bayonet type by coil, can Exterior cable be directly installed on, facilitate in-site installation.
Accompanying drawing explanation
Fig. 1 is the utility model overall plan structural representation;
Fig. 2 is the utility model terminal node structural representation;
Fig. 3 is the utility model draw-out power supply administration module circuit theory diagrams;
Fig. 4 is the utility model Centroid circuit theory diagrams;
Fig. 5 is the temp measuring system software flow pattern in the utility model data management platform;
Wherein, 3, conductor, 4, cable, 7, fluid sealant, 9, data acquisition module, 10, wireless transmitter module, 20, warning horn;
31, draw-out power supply, 32, Centroid module, 33, data processing module, 34, GPRS transmitter module;
50, power management module, 51, getting can coil, 52, protection circuit, 53, current rectifying and wave filtering circuit, 54, getting can power control circuit, 55, voltage-stabilizing output circuit, 56, accumulator;
61, containment vessel, 62, prefabricated component;
T1, joint conductor sensor, T2, body conductor sensor, T3, body epidermis sensor; T4, joint epidermis sensor, T5, containment vessel epidermis sensor I, T6, containment vessel epidermis sensor II; T7, environment temperature sensor, R1, built-in signal dual-mode antenna.
Below in conjunction with embodiment, the utility model is described in further details:
See Fig. 1 ~ Fig. 5, terminal node is arranged: each terminal node includes seven temperature sensors according to Fig. 2, be respectively: the joint conductor sensor T1 on the conductor 3 in prefabricated component 62, be arranged on the body conductor sensor T2 on the conductor 3 of cable 4, be arranged on the supracutaneous body epidermis sensor T3 of cable 4, be arranged on the supracutaneous joint epidermis sensor T4 of prefabricated component 62, be symmetricly set on containment vessel epidermis sensor I T5 and containment vessel epidermis sensor II T6 at containment vessel 61 epidermis two ends, and environment temperature sensor T7, wherein containment vessel epidermis sensor I T5 and containment vessel epidermis sensor II T6 is arranged symmetrically in 1/6 place on the containment vessel 61 of intermediate head 6 and 5/6 place, the unsettled meter Chu position being placed in the containment vessel 61 of distance intermediate head of environment temperature sensor T7, multimetering is realized like this by installing respective temperature sensor at the different layers of cable 4, to improve measuring accuracy.
Joint conductor sensor T1 adopts the wireless conductor temperature monitoring equipment of 3MSC123TII joint, belong to wireless sourceless sensor, the shell of this sensor is polytetrafluoro material, intermediate head internal electric field can not be affected after the sensor of this material is installed, and then the change of intermediate head internal temperature field can not be caused, temperature test precision is high.Joint conductor sensor T1 adopts cirque structure, and joint conductor sensor T1, with cable conductor external diameter coupling, is enclosed within the conductor 3 of the cable 4 in prefabricated component 62 by internal diameter in intermediate head installation process.Joint conductor sensor T1 housing exterior is smooth, can extend as the insulation of cable 4, and the intermediate head inside being installed to cable 4 can not have an impact to the insulating property of cable 4.The mounting means of this kind of sensor can be built in cable intermediate joint inside when not destroying cable insulation, direct measurement cable intermediate joint conductor temperature, simultaneously because joint conductor sensor T1 is arranged on the intermediate head inside of cable 4, therefore, it is possible to effectively prevent external environment from damaging and affecting, the Long-Time Service of joint conductor sensor T1 under the various severe running environment such as cable tunnel, cable duct can be allowed.
Body conductor sensor T2 ~ environment temperature sensor T7 is mainly used in measuring except intermediate head conductor, and the temperature of all the other measuring points, so that be analyzed with intermediate head conductor temperature.These six temperature sensors are the wired temperature sensor of DSl8B20 type, belong to 1-wire digital temperature sensor, DS18B20 temperature sensor is a kind of modified intelligent temperature sensor of the up-to-date release of DALLAS semiconductor company of the U.S., whole conversion element and change-over circuit are integrated in shape as in the integrated circuit of triode, volume is little, at temperature measurement accuracy, switching time, transmission range, the aspect advantages such as resolution, temperature signal directly can be converted to digital signal, the superiority of DS18B20 temperature sensor, all temperature datas can be transferred to data acquisition module by multiple sensor parallel in a single data bus, at multi-point temperature measurement, be widely used in intelligent temperature detection system.
The interspersed installation carrying out respective temperature sensor in intermediate head manufacturing process; the built-in signal dual-mode antenna R1 of joint conductor sensor T1 is drawn out to outside prefabricated component 62; the encapsulating mouth of the signal extension line of all temperature sensors from containment vessel 61 is drawn; between prefabricated component 62 and containment vessel 61, pour into fluid sealant 7 such as epoxy resin or polyurethane water-proof resin seal; because epoxy resin or polyurethane water-proof resin have excellent bonding strength; dielectric properties are good, prefabricated component 62 and containment vessel 61 tight seal are integrated.
Above-mentioned seven sensors all communicate to connect with the input end of data acquisition module 9, and data acquisition module 9 is highly integrated unibus multiple spot power drive type gauge outfits, carries out data communication by built-in ZigBee wireless module.This data acquisition module 9 thermometric speed is 4s, and protection against lightning strikes is 6.5KV, and protection baud rate 9600.n.8.1, PORT COM RS485(are based on MODBUS-RTU communications protocol), RS485 bus transfer distance is 1200m, and running environment is-40 DEG C ~+85 DEG C.These advantages can ensure that this data acquisition module 9 runs reliably and with long-term.
The output terminal of data acquisition module 9 is connected with the input end of ZigBee wireless transmitter module 10, and the output terminal of ZigBee wireless transmitter module 10 is connected with the Centroid module 32 of Centroid.ZigBee wireless transmitter module 10 is sent to Centroid for the cable intermediate joint each point temperature data collected by data acquisition module 9 by the mode of relay forwarding.Power cable line has an intermediate head every about 400 meters, this needs wireless transmission method to have suitable transmission range, and wireless transmission distance is relevant to power consumption, limited owing to getting the energy supply of energy coil 51, the power consumption of wireless transmission method can not be excessive, temperature data amount is little, and without the need to too high transfer rate, not high to the transmission rate request of wireless transmission method.The utility model have chosen ZigBee communication and carries out data transmission, while guarantee data transmission distance and reliability, also has the feature of low-power consumption.
Draw-out power supply administration module comprises that get can coil 51 and with get can the power management module 50 that is connected of coil 51, generates the driving voltage of a 12V with the electric current passed through in cable 4.Power management module 50 comprise connect successively protection circuit 52, current rectifying and wave filtering circuit 53, getting can power control circuit 54 and voltage-stabilizing output circuit 55, get and can also be connected with lithium battery 56 by power control circuit 54, the output terminal of protection circuit 52 also with get and can be connected by power control circuit 54; Get and can be bayonet-like structures, be directly installed on outside cable 4 by coil 51, data acquisition module 9, ZigBee wireless transmitter module 10 and power management module 50 can be arranged in intermediate head outside or the inner newly-designed cell of intermediate head.Get energy coil 51 for the electric current formed magnetic field in cable 4 is converted into voltage; Protection circuit 52 is for preventing the superpotential formed when cable 4 failed shorted or power system operation to the impact of system; Alternating voltage is converted to DC voltage by current rectifying and wave filtering circuit 53, carries out filtering to this voltage simultaneously, reduces the harmonic wave of voltage.
Get can power control circuit 54 for monitoring by the voltage that formed of coil 51 getting, when electric power is sufficient, getting can the monitoring system energy supply that forms directly to data acquisition module 9 and ZigBee wireless transmitter module 10 of coil 51, and charges to lithium battery 56; Electric power is not enough or without electricity time, powered by lithium battery 56 pairs of data acquisition modules 9 and ZigBee wireless transmitter module 10, effectively increase the flying power of power supply, can meet and steady in a long-termly continue energy supply.Voltage-stabilizing output circuit 55 is for stable output 12V voltage.This draw-out power supply administration module is applicable to the ultra-high-tension power transmission line of the electric pressures such as 10kV, 35kV, 110kV, 220kV, 500kV, can be the power equipments such as outdoor electric circuit on-line measuring device, line facility anti-theft device, the filthy on-Line Monitor Device of high-tension line and provides power supply steady in a long-term.
Data acquisition module 9 and ZigBee wireless transmitter module 10 are ZigBee communication.
Centroid is arranged: each Centroid comprises the draw-out power supply 31, ZigBee Centroid module 32, data processing module 33 and the GPRS transmitter module 34 that connect successively according to Fig. 2, ZigBee Centroid module 32 communicates to connect with corresponding ZigBee wireless transmitter module 10, and GPRS transmitter module 34 is communicated to connect by GPRS network and data management platform.
Wherein data processing module 33 is the single-chip microcomputers with calculating and data analysis function.When Centroid works, first the ZigBee Centroid module 32 terminal node temperature data that adopts the mode of poll to read it to be responsible in scope, then obtained temperature data is transferred in data processing module 33, single-chip microcomputer in data processing module 33 passes through software computation and analysis, by temperature data process in subrange.If temperature data is all normal, then data is carried out packing and upload; If temperature exists abnormal, then given the alarm to dispatching center immediately by warning horn 20, and send abnormal data bag to upper layer network.Centroid, to upper layer cloud transmitted data on network, mainly utilizes GPRS transmitter module 34 by GPRS network, data to be stored into the server in high in the clouds.By such mist computational grid, low dimension data process is placed on data acquisition end, deduct data upload high in the clouds and return this process of dispatching center from high in the clouds by information feed back after process again, can give the alarm to dispatching center with prestissimo when intermediate head generation local overheating, to regulate and control load in time, Accident prevention occurs.Meanwhile, high in the clouds can send the operation of command control center's node by warning horn and Centroid, realize the two-way communication of high-rise cloud network and mist computational grid.
Data management platform is in order to realize the collection of temperature data, process, storage, diagnosis and early warning, comprise the server of built-in temp measuring system software, this server is communicated to connect by the GPRS transmitter module 34 of GPRS network and Centroid, temp measuring system software utilizes LabVIEW software programming, in order to realize the control of temp measuring system and the management of temperature data.
Also arrange warning horn 20, warning horn 20 is communicated to connect by the GPRS transmitter module 34 of GPRS network and Centroid.
Terminal node is the monitoring means being arranged on intermediate head or emphasis monitored area, terminal node is by the automatic network-building function of ZigBee wireless transmitter module 10, composition ZigBee-network, each terminal node has the function of terminal and relaying concurrently, ensures long-time running with draw-out power supply administration module simultaneously.Terminal node gathers the cable temperature data of position, is uploaded to Centroid by the mode of relaying.Centroid is arranged on cable shaft or cable outlet place, meets GPRS signal transmitting and receiving requirement.The mode of poll of adopting Centroid reads its terminal node temperature data being responsible in scope, the data read are processed by the single-chip microcomputer in data processing module 33, by process after data utilize ZigBee to turn GPRS gateway via GPRS transmitter module 34, by GPRS network by data upload.If the single-chip microcomputer analysis in data processing module 33 finds that there is local overheating, then by data upload to warning horn 20, send cable 4 temperature alarm by warning horn 20 to dispatching center, data upload analyzed further to high in the clouds data management platform simultaneously; If data are normal, be then directly uploaded to high in the clouds data management platform.Mist calculates and directly analyzes at bottom data, can carry out and alarm abnormal conditions.In addition, high in the clouds data management platform can also utilize warning horn 20 to send instruction to Centroid, controls the operation of Centroid.
ZigBee is the networking wireless standard of a kind of low complex degree for the various system of control & monitor, self-organization, low-power consumption, low data rate, low cost, supports multiple network topological structure.Adopt the equipment of ZigBee at least can work 2 years and without the need to changing battery.