CN207623451U - A kind of cable monitoring device - Google Patents
A kind of cable monitoring device Download PDFInfo
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- CN207623451U CN207623451U CN201721723764.9U CN201721723764U CN207623451U CN 207623451 U CN207623451 U CN 207623451U CN 201721723764 U CN201721723764 U CN 201721723764U CN 207623451 U CN207623451 U CN 207623451U
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Abstract
The utility model is related to cable monitoring fields, and in particular to a kind of cable monitoring device.The interface includes obtaining cable or the operating state information acquisition interface of cable connector running state information, and obtain the inductive signal acquisition interface of external environment heat transfer agent, the board structure of circuit includes processor module and LPWAN transmission modules, and the processor die group is connect with operating state information acquisition interface, inductive signal acquisition interface and LPWAN transmission module respectively.The utility model at cable or cable intermediate joint by being arranged a cable monitoring device, obtain running state information and environment induction information, and module is transmitted by LPWAN and is reported, it realizes the on-line checking of the operating status of cable or cable intermediate joint, and decision is provided for distribution network operation and equipment state maintenance；Further, the problem that underground power cable is difficult to safeguard is also solved, practical problem present in Operation of Electric Systems can be effectively solved, improves power supply reliability.
Description
Technical Field
The utility model relates to a cable monitoring field, concretely relates to cable monitoring device.
Background
With the rapid development of economy, the high-voltage power supply line is becoming a trend. However, most power cable channels are narrow and closed, and are difficult to clean and maintain; water accumulation easily occurs, which leads to sludge accumulation and garbage piling. The long-term pollution accumulation and cable soaking can generate flammable and explosive gases such as methane, ammonia gas, hydrogen and the like; resulting in accelerated cable aging and even threatening the safety of operation and maintenance personnel.
According to incomplete statistics, cable fires caused by overheating of the cable intermediate joint account for more than half of the total number of the cable fires, so that the running condition of the cable intermediate joint is known in time, and the safety of a power supply grid is related. Theoretical analysis and summary of actual operating conditions were performed on the temperature rise of the cable intermediate joint, both of which showed: the faults occurring at the cable middle joint are not sudden accidents, and are often caused by that a large amount of heat is generated by various faults of the joint, so that the temperature of the cable middle joint is continuously increased, the leakage current is continuously increased, the high-temperature aging of the insulation material of the joint is accelerated, and finally the thermal breakdown of the joint and even the cable fire are caused, so that the temperature of the cable middle joint is an important parameter reflecting the operation state of the cable middle joint. Therefore, the real-time online monitoring of the temperature of the cable intermediate joint, which is not interfered by the external environment and not influenced by the strong electromagnetic field, is very important, and the potential safety hazard can be found in time.
Currently, there are three general methods for online monitoring of the running state of underground cables: firstly, a mobile video monitoring system is installed, is only suitable for a large tunnel and needs special construction; and temperature can only be measured by an infrared camera. Secondly, distributed optical fiber temperature measurement is adopted, optical fibers need to be arranged, and construction difficulty is high; and the optical fiber is easy to damage and can only measure temperature. And thirdly, the GPRS-based acquisition terminal has poor communication quality, high power consumption, incapability of self-power supply and difficulty in long-term operation. The above methods have fatal defects, and thus are difficult to be widely popularized.
How to realize the monitoring of the cable intermediate joint with high efficiency, stability, safety, convenience and low cost is one of the problems of the intensive research of the technicians in the field.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a cable monitoring device, realize high-efficient stable, safe, convenient, monitor cable intermediate head with low costs.
The utility model provides a technical scheme that its technical problem adopted is: the cable monitoring device comprises a shell, a plurality of interfaces arranged on the shell and a circuit board structure arranged in the shell, wherein the circuit board structure is respectively connected with the plurality of interfaces; wherein,
the circuit board structure comprises a processor module and an LPWAN transmission module, wherein the processor module is respectively connected with the operation state information acquisition interface, the induction signal acquisition interface and the LPWAN transmission module;
the processor module sends the acquired data information to an external gateway router through the LPWAN transmission module and sends the data information to the cloud end through the gateway router; and the processor module is used for locally storing the acquired data information.
Wherein, the preferred scheme is: the processor module comprises an analysis and judgment module, the analysis and judgment module presets a plurality of data thresholds, and compares and analyzes the acquired data information with the corresponding data thresholds respectively to judge whether a fault exists; and if the fault occurs, the processor module uploads fault information through the LPWAN transmission module.
Wherein, the preferred scheme is: the processor module comprises a timing trigger module, and the timing trigger module triggers and wakes up the processor module at regular time; the processor module also comprises an event trigger module, wherein the event trigger module is preset with various events and triggers and wakes up the processor module when the events occur; the processor module is in a dormant state before being triggered and awakened, and acquires corresponding data information through the interface after being triggered and awakened.
Wherein, the preferred scheme is: the interface also includes an external trigger interface.
Wherein, the preferred scheme is: the cable monitoring device further comprises an LPWAN antenna, the interface further comprises an LPWAN antenna interface, and the LPWAN transmission module is connected with the LPWAN antenna through the LPWAN antenna interface.
Wherein, the preferred scheme is: the running state information acquisition interface is connected with a temperature sensor arranged on a cable or a cable joint to acquire temperature information of the cable or the cable joint;
or the running state information acquisition interface is connected with a current sensor arranged on the cable or the cable joint to acquire the current information of the cable or the cable joint.
Wherein, the preferred scheme is: the cable monitoring device also comprises an environment sensor unit for acquiring external environment sensing information, wherein the environment sensor unit is connected with the sensing signal acquisition interface; wherein the sensor unit comprises one or more of a humidity sensor, a smoke sensor, an oxygen sensor, a combustible gas sensor, an air quality sensor and an infrared proximity sensor.
Wherein, the preferred scheme is: the running state information acquisition interface is connected with a partial discharge measurement unit arranged on a cable or a cable joint, and the partial discharge measurement unit acquires partial discharge information of the cable or the cable joint; the processor module collects partial discharge information and judges whether a fault exists, and if the fault exists, the fault information is uploaded through the LPWAN transmission module; the partial discharge measurement unit comprises an ultraviolet detection module, an ozone detection module and an HFCT module.
Wherein, the preferred scheme is: the cable monitoring device further comprises a GPS module, and the GPS module provides position information.
Wherein, the preferred scheme is: the interface also comprises a micro-energy signal acquisition interface which is connected with an external micro-energy acquisition unit; the micro-energy acquisition unit is used for converting surrounding electromagnetic field energy or heat energy into electric energy by collecting the energy and the heat energy, and supplying power to the cable monitoring device through the micro-energy signal acquisition interface.
The utility model has the advantages that compared with the prior art, the utility model discloses a set up a cable monitoring device in cable or cable intermediate head department, acquire running state information and environmental response information, and report through LPWAN transmission module, realize the on-line measuring of the running state of cable or cable intermediate head, and provide the decision-making for distribution network operation and equipment state maintenance; furthermore, the problem that the underground power cable is difficult to maintain is solved, the practical problems existing in the operation of a power system can be effectively solved, and the power supply reliability is improved.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a block diagram of the cable monitoring device of the present invention;
fig. 2 is a schematic structural diagram of the cable monitoring device of the present invention;
FIG. 3 is a block diagram of the analysis and judgment module of the present invention;
fig. 4 is a block diagram of the trigger module of the present invention;
fig. 5 is a block diagram of the partial discharge measurement unit according to the present invention.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the present invention provides a preferred embodiment of a cable monitoring device. Wherein, fig. 1 is a block diagram of the cable monitoring device of the present invention; fig. 2 is a schematic structural diagram of the cable monitoring device of the present invention.
A cable monitoring device 110, the cable monitoring device 110 includes a housing 116, a plurality of interfaces 113 disposed on the housing 116, and a circuit board structure (not shown) disposed in the housing 116, the circuit board structure being connected to the plurality of interfaces 113, respectively.
Specifically, the interface 113 includes an operation state information acquisition interface 1132 for acquiring operation state information of the cable 121 or the cable connector 122, and an inductive signal acquisition interface 1137 for acquiring external environment sensing information, the circuit board structure includes a processor module 111 and an LPWAN transmission module 112, and the processor module 111 is connected with the operation state information acquisition interface 1132, the inductive signal acquisition interface 1137 and the LPWAN transmission module 112 respectively. The processor module 111 sends the acquired data information to an external gateway router 130 through the LPWAN transmission module 112, and sends the acquired data information to the cloud 140 through the gateway router 130; and, the processor module 111 stores the collected data information locally.
In this embodiment, the processor module 111 includes a processor circuit, an acquisition circuit and a communication circuit, where the acquisition circuit is connected to the electric quantity signal acquisition interface 113 and the sensing signal acquisition interface 1137, respectively, and sends the acquired data information to the processor circuit; the processor circuit sorts, analyzes and processes the data information, then sends the processed data information to the LPWAN transmission module 112 through the communication circuit, and stores the processed data information to the local storage module through the communication circuit.
Preferably, the acquisition circuit is an a/D conversion circuit, converts the electric quantity signal of the cable 121 or the cable joint 122 into a digital signal, and sends the digital signal to the processor circuit; and, the acquisition circuit may also be a data transmission circuit, which receives the sensing signal transmitted by the sensor unit 115 and sends it to the processor circuit.
And the processor circuit is an ARM CPU, and certainly, may also be other processing chips or a digital circuit structure, and realizes data acquisition, management and information reporting. Wherein, the processor circuit is preferably STM32L071CB ultra-low power consumption MCU.
In this embodiment and referring to fig. 2, the cable monitoring apparatus 110 further includes an LPWAN antenna, the interface 113 further includes an LPWAN antenna interface 1133, and the LPWAN transmission module 112 is connected to the LPWAN antenna through the LPWAN antenna interface 1133.
The LPWAN is one of LPWAN communication technologies, and is an ultra-long-distance wireless transmission scheme based on a spread spectrum technology adopted and popularized by Semtech corporation in the united states. The scheme changes the prior compromise consideration mode of transmission distance and power consumption, provides a simple system which can realize long distance, long battery life and large capacity for users, and further expands the sensing network. Currently, LPWAN mainly operates in global free frequency bands including 433, 868, 915MHz, and the like. The low-power-consumption LPWAN technology is adopted, strong penetration, long-distance and ad hoc network communication is realized, the defects that the communication signal is poor, the power consumption is high and the communication depends on telecommunication operators in the prior art are overcome, the deployment is simple, and the expansion is convenient. And, provides an 8 year operational life under battery powered conditions.
In this embodiment, the operation status information collecting interface 1132 is connected to a temperature sensor disposed on the cable 121 or the cable connector 122 to obtain temperature information of the cable 121 or the cable connector 122. Or, the operation state information collecting interface 1132 is connected to a current sensor disposed on the cable 121 or the cable connector 122 to obtain current information of the cable 121 or the cable connector 122.
Specifically, the temperature sensor is used for acquiring the temperature information of the cable 121 or the cable joint 122, so that the power condition of the cable 121 or the cable joint 122 is known, and the higher the temperature is, the higher the current is, or the leakage occurs, and the like, and meanwhile, the too high temperature may also cause damage to the related electronic components of the cable monitoring device 110.
The current sensor is a detection device which can sense the information of the current to be detected and convert the sensed information into an electric signal meeting certain standards or other required information output according to a certain rule so as to meet the requirements of information transmission, processing, storage, display, recording, control and the like. The current sensor is different according to the measurement principle, and can be mainly divided into: shunts, electromagnetic current transformers, electronic current transformers, and the like.
In this embodiment, the cable monitoring device 110 further includes an environment sensor unit 115 for acquiring external environment sensing information, and the environment sensor unit 115 is connected to the sensing signal collecting interface 1137.
The environmental sensor unit 115 may include one or more of a level sensor, a smoke sensor, an oxygen sensor, a combustible gas sensor, an air quality sensor, and an infrared proximity sensor, and transmits sensing signals to the processor module 111 through the sensing signal acquisition interface 1137.
Wherein, the combustible gas sensor is preferably a methane sensor; the air quality sensor is preferably an HS sensor; the water sensor is based on the principle of liquid conduction, and uses electrode to detect whether there is water, and then uses the sensor to convert it into dry contact point output. Normally open, and the predetermined time is 3 days if the need for normally closed is predetermined.
In this embodiment, and referring to fig. 2, the interface 113 further includes a micro-energy signal collecting interface 1131, i.e., the power interface 113; the interface 113 further includes a GPS antenna interface 1134, wherein the cable monitoring device 110 further includes a GPS module, the GPS module is connected to the processor module 111 and is configured to send together with GPS location information when reporting data, and the GPS module is connected to a GPS antenna through the GPS antenna interface 1134; the interface 113 further includes a debug interface 1135; the debug interface 1135 is used for field online maintenance.
The cable monitoring device 110 further includes a power module, which is composed of an industrial lithium battery and an electric field/thermal energy collecting module, and is connected to the micro energy signal collecting interface 1131 to supply power to the whole system. The interface also comprises a micro-energy signal acquisition interface 1131, and the micro-energy signal acquisition interface 1131 is connected with an external micro-energy acquisition unit; the micro-energy acquisition unit is used for converting surrounding electromagnetic field energy or heat energy into electric energy by collecting the energy or the heat energy, and supplying power to the cable monitoring device through the micro-energy signal acquisition interface 1131
Further, the shell 116 of the cable monitoring device 110 further comprises a waterproof vent valve 117, the waterproof vent valve 117 is commonly called a respirator, a vent screw and the like, the shell PA66+ 20% glass fiber raw material is integrally formed through injection molding or brass is adopted as a hard support body, a high-temperature-resistant silica gel O-shaped ring is sleeved outside the shell, and the membrane material and the shell are combined together through various tightly-wrapping processes.
In this embodiment, the cable monitoring apparatus 110 further includes a storage unit 114, such as a hard disk and a memory, the storage unit 114 is configured to store local data, and the processor module 111 periodically uploads all data to the cloud 140.
As shown in fig. 3, the present invention provides a preferred embodiment of the analysis and judgment module 1111. Fig. 3 is a block diagram of the analysis and judgment module 1111 according to the present invention.
The processor module 111 includes an analysis and judgment module 1111, which presets a plurality of data thresholds, and compares and analyzes each acquired data information with the corresponding data threshold respectively to judge whether a fault exists; and if the fault occurs, the processor module 111 uploads fault information through the LPWAN transmission module 112.
Preferably, the analysis and judgment module 1111 includes a chip and an external circuit, and implements data analysis and comparison to judge whether a fault exists. Or, the analysis and judgment module 1111 includes a logic circuit, and analyzes and compares the externally acquired data information to realize the judgment.
Further, each item of data has a data threshold, real-time data information is detected, if the data information exceeds the range of the data threshold, it is determined that an abnormality exists, that is, a fault exists, and corresponding fault information is uploaded to the cloud 140.
As shown in fig. 4, the present invention provides a preferred embodiment of the trigger module. Fig. 4 is a block diagram of the triggering module according to the present invention.
The processor module 111 comprises a timing trigger module 1112, and the timing trigger module 1112 triggers the processor module 111 to wake up in a timing manner; the processor module 111 further includes an event triggering module 1113, where the event triggering module 1113 presets a plurality of events and triggers to wake up the processor module 111 when an event occurs; the processor module 111 is in a sleep state before being triggered and awakened, and acquires corresponding data information through the interface 113 after being triggered and awakened.
Further, the interface 113 further includes an external trigger interface 1136. The external trigger interface 1136 is connected with the water sensor and the entrance guard sensor; the interface 113 is triggered when a flood or intrusion event occurs.
As shown in fig. 5, the present invention provides a preferred embodiment of a partial discharge measurement unit. Wherein, fig. 5 is a block diagram of the partial discharge measurement unit according to the present invention.
The operation state information collecting interface 1132 is connected to a partial discharge measurement unit 150 arranged on the cable 121 or the cable connector 122, and the partial discharge measurement unit 150 acquires partial discharge information of the cable 121 or the cable connector 122; the processor module 111 collects partial discharge information, determines whether a fault exists, and uploads fault information through the LPWAN transmission module 112 if the fault exists.
The partial discharge is a discharge phenomenon that when an external voltage is applied, the field intensity generated in the electrical equipment is enough to enable the insulating partial area to discharge, but a fixed discharge channel is not formed in the discharge area.
In the present embodiment, the partial discharge measurement unit 150 includes an ultraviolet detection module, an ozone monitoring module, and an HFCT module. The ultraviolet detection module acquires the magnitude of the partial discharge amount by detecting the ultraviolet radiation intensity; the ozone monitoring module confirms whether discharge is generated or not through the detection of the ozone concentration; the HFCT module detects the partial discharge by detecting the magnitude of the high-frequency pulse current; through the fusion of the data of the three types of sensors, the partial discharge of the cable 121 can be effectively detected.
The utility model discloses in, but cable monitoring device 110 wide application in power cable 121 tunnel, the power distribution room intelligent monitoring, photovoltaic power generation, vehicle charging station, wind, gas, coal, water and electricity, subway, airport, wisdom agriculture, wisdom city, public service line such as elephant station. Has very wide market prospect.
Preferably, the method is applied to the field of grounding of high-voltage power supply lines.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, which is intended to cover all equivalent changes and modifications made within the scope of the present invention.
Claims (10)
1. A cable monitoring device, characterized by: the cable monitoring device comprises a shell, a plurality of interfaces arranged on the shell and a circuit board structure arranged in the shell, wherein the circuit board structure is respectively connected with the plurality of interfaces; wherein,
the circuit board structure comprises a processor module and an LPWAN transmission module, wherein the processor module is respectively connected with the operation state information acquisition interface, the induction signal acquisition interface and the LPWAN transmission module;
the processor module sends the acquired data information to an external gateway router through the LPWAN transmission module and sends the data information to the cloud end through the gateway router; and the processor module is used for locally storing the acquired data information.
2. The cable monitoring device of claim 1, wherein: the processor module comprises an analysis and judgment module, the analysis and judgment module presets a plurality of data thresholds, and compares and analyzes the acquired data information with the corresponding data thresholds respectively to judge whether a fault exists; and if the fault occurs, the processor module uploads fault information through the LPWAN transmission module.
3. The cable monitoring device of claim 2, wherein: the processor module comprises a timing trigger module, and the timing trigger module triggers and wakes up the processor module at regular time; the processor module also comprises an event trigger module, wherein the event trigger module is preset with various events and triggers and wakes up the processor module when the events occur; the processor module is in a dormant state before being triggered and awakened, and acquires corresponding data information through the interface after being triggered and awakened.
4. The cable monitoring device of claim 3, wherein: the interface also includes an external trigger interface.
5. The cable monitoring device of claim 1, wherein: the cable monitoring device further comprises an LPWAN antenna, the interface further comprises an LPWAN antenna interface, and the LPWAN transmission module is connected with the LPWAN antenna through the LPWAN antenna interface.
6. The cable monitoring device of claim 1, wherein: the running state information acquisition interface is connected with a temperature sensor arranged on a cable or a cable joint to acquire temperature information of the cable or the cable joint;
or the running state information acquisition interface is connected with a current sensor arranged on the cable or the cable joint to acquire the current information of the cable or the cable joint.
7. The cable monitoring device of claim 1, wherein: the cable monitoring device also comprises an environment sensor unit for acquiring external environment sensing information, wherein the environment sensor unit is connected with the sensing signal acquisition interface; wherein the sensor unit comprises one or more of a humidity sensor, a smoke sensor, an oxygen sensor, a combustible gas sensor, an air quality sensor and an infrared proximity sensor.
8. The cable monitoring device of claim 1, wherein: the running state information acquisition interface is connected with a partial discharge measurement unit arranged on a cable or a cable joint, and the partial discharge measurement unit acquires partial discharge information of the cable or the cable joint; the processor module collects partial discharge information and judges whether a fault exists, and if the fault exists, the fault information is uploaded through the LPWAN transmission module; the partial discharge measurement unit comprises an ultraviolet detection module, an ozone detection module and an HFCT module.
9. The cable monitoring device of claim 1, wherein: the cable monitoring device further comprises a GPS module, and the GPS module provides position information.
10. The cable monitoring device of claim 1, wherein: the interface also comprises a micro-energy signal acquisition interface which is connected with an external micro-energy acquisition unit; the micro-energy acquisition unit is used for converting surrounding electromagnetic field energy or heat energy into electric energy by collecting the energy and the heat energy, and supplying power to the cable monitoring device through the micro-energy signal acquisition interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721723764.9U CN207623451U (en) | 2017-12-12 | 2017-12-12 | A kind of cable monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721723764.9U CN207623451U (en) | 2017-12-12 | 2017-12-12 | A kind of cable monitoring device |
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| CN207623451U true CN207623451U (en) | 2018-07-17 |
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| CN201721723764.9U Active CN207623451U (en) | 2017-12-12 | 2017-12-12 | A kind of cable monitoring device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020756A (en) * | 2017-12-12 | 2018-05-11 | 中科（深圳）能源物联网有限公司 | A kind of cable monitoring device |
| CN110726903A (en) * | 2019-11-25 | 2020-01-24 | 济南瑞森智能科技有限公司 | Rail transit electric power through power supply on-line monitoring operation and maintenance management system |
| EP4025920A4 (en) * | 2019-09-05 | 2023-08-30 | Aclara Technologies LLC | System and method for sensing one or more power lines |
-
2017
- 2017-12-12 CN CN201721723764.9U patent/CN207623451U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020756A (en) * | 2017-12-12 | 2018-05-11 | 中科（深圳）能源物联网有限公司 | A kind of cable monitoring device |
| EP4025920A4 (en) * | 2019-09-05 | 2023-08-30 | Aclara Technologies LLC | System and method for sensing one or more power lines |
| CN110726903A (en) * | 2019-11-25 | 2020-01-24 | 济南瑞森智能科技有限公司 | Rail transit electric power through power supply on-line monitoring operation and maintenance management system |
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