CN211148776U - Current acquisition device and current monitoring system - Google Patents
Current acquisition device and current monitoring system Download PDFInfo
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- CN211148776U CN211148776U CN201921329164.3U CN201921329164U CN211148776U CN 211148776 U CN211148776 U CN 211148776U CN 201921329164 U CN201921329164 U CN 201921329164U CN 211148776 U CN211148776 U CN 211148776U
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Abstract
The utility model provides a current collecting device and a current monitoring system, wherein the current collecting device comprises a current sensor, a collecting unit and a power supply; the current sensor is provided with an opening penetrating through the side surface, the grounding wire penetrates through the opening, and one end of the current sensor is electrically connected with the acquisition unit; the power supply comprises an energy storage module, a magnetic field induction generator and a wind driven generator, wherein an induction coil is arranged in the magnetic field induction generator, a magnetic field of the transformer penetrates through the induction coil, the wind driven generator is arranged at one end, far away from the current sensor, of the magnetic field induction generator, and the energy storage module stores current transmitted by the magnetic field induction generator and the wind driven generator and supplies power to an acquisition unit electrically connected with a battery; the acquisition unit is fixed between the current sensor and the magnetic field induction generator. The utility model discloses can the ground current of real-time supervision iron core folder need not artifical monitoring, has reduced work load, has guaranteed the real-time acquisition of information, can monitor ground current for a long time moreover, has avoided the power consumption hidden danger.
Description
Technical Field
The utility model relates to a smart power grids field especially relates to a current collection system and current monitoring system.
Background
Due to the rapid development of national economy, modern power systems are changed to large power grids, large capacity and high voltage, and more electrical devices are used. In various electrical devices of an electric power system, a transformer is taken as a key device, which mainly performs voltage and current conversion and energy transmission, and the operation failure of the transformer is not only related to the reliability of power supply, but also seriously threatens the operation safety of the electric power system. Therefore, researching transformer fault diagnosis technology and improving the operation and maintenance level of the transformer are a topic with great practical significance and practical value in the power system.
Due to the high maintenance cost of the transformer, the on-line monitoring of the transformer is very important. However, the transformers are not centralized in operation, but are distributed in a distributed manner to operate independently in various places, so that the manual monitoring workload is huge and information is delayed. Moreover, for remote unattended substations with low voltage levels, the situation that long-term manual monitoring cannot be carried out often exists, and potential safety hazards exist for daily electricity utilization of people.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of prior art, the utility model provides a current collection system and current monitoring system can the ground current of real-time supervision iron core folder need not artifical monitoring, has reduced work load, has guaranteed the real-time acquisition of information, can monitor ground current for a long time moreover, has avoided the power consumption hidden danger.
In order to solve the above problem, the utility model discloses a technical scheme do: a current collecting device is applied to current monitoring of a grounding wire of a transformer core clamping piece and comprises a current sensor, a collecting unit and a power supply, wherein the collecting unit is electrically connected with the current sensor and the power supply respectively; the current sensor is provided with an opening penetrating through two parallel side surfaces, the grounding wire penetrates through the opening, and one end of the current sensor is electrically connected with the acquisition unit; the power supply comprises an energy storage module, a magnetic field induction generator and a wind driven generator, the magnetic field induction generator is rotatably fixed at one end, far away from the current sensor, of the acquisition unit, an induction coil is arranged inside the magnetic field induction generator, a magnetic field of the transformer penetrates through the induction coil, the wind driven generator is arranged at one end, far away from the current sensor, of the magnetic field induction generator, and the energy storage module stores current transmitted by the magnetic field induction generator and the wind driven generator and supplies power to the acquisition unit electrically connected with the energy storage module; the acquisition unit is fixed between the current sensor and the magnetic field induction generator, and transmits a current signal of an iron core clamp grounding wire acquired by the current sensor to the edge calculation service device through the acquisition unit, and then transmits the current signal to the remote monitoring platform through the edge calculation service device.
Furthermore, two bosses opposite to each other are arranged at one end of the opening, at least one screw hole penetrating through the bosses is arranged on each boss, the screw hole is perpendicular to the opening, and the current collecting device is fixed on the grounding wire through the screw hole.
Further, the acquisition unit comprises a shell, one end of the current sensor is fixed to one side of the shell, the magnetic field induction generator is fixed to one side, far away from the current sensor, of the shell, and the energy storage module is fixed to the inside of the shell.
Furthermore, the acquisition unit still includes acquisition circuit, acquisition circuit includes operational amplifier circuit, analog-to-digital conversion circuit and singlechip, acquisition unit passes through acquisition circuit with the current sensor electricity is connected.
Furthermore, the acquisition unit further comprises a first antenna, the first antenna is fixed on one side of the shell and electrically connected with the acquisition circuit, and the current signals acquired by the acquisition circuit are sent to the edge calculation device through the first antenna.
Further, the acquisition unit still includes at least one water joint, water joint sets up casing one side, with first antenna is relative, water joint with the acquisition circuit electricity is connected, through water joint transmits the current signal that acquisition circuit gathered.
Further, the magnetic field induction generator comprises a rectangular square frame, one end of the rectangular square frame protrudes towards the direction close to the acquisition unit to form a protruding end, and the protruding end is rotatably fixed on the acquisition unit.
Further, the induction coils are arranged side by side inside the rectangular box.
Based on the same inventive concept, the utility model also provides a current monitoring system, the current monitoring system is applied to the current monitoring of the earth connection of transformer core folder, the current monitoring system includes edge calculation service device, remote monitoring platform and as above current collection device; the edge computing service device receives a current signal of a grounding wire sent by the current collecting device, encrypts the current signal and sends the current signal to the remote monitoring platform; and the remote monitoring platform receives the current signal after encryption processing, monitors the current value of the grounding wire and records an alarm event.
Furthermore, the edge computing service device comprises a chassis, an edge computing server, a second antenna and a protocol converter, wherein the edge computing server and the protocol converter are arranged inside the chassis, and the edge computing service device is in communication connection with the current collecting device through the second antenna.
Compared with the prior art, the beneficial effects of the utility model reside in that: the current of the iron core clamp grounding wire of the transformer is collected through the current sensor, the real-time monitoring of the grounding current is realized, the manual monitoring is not needed, the workload is reduced, the real-time acquisition of information is ensured, and the automatic acquisition of electric energy is realized through the generator and the energy storage module arranged on the current sensor, so that the grounding current can be monitored for a long time, and the potential electricity utilization hazard is avoided.
Drawings
Fig. 1 is a structural diagram of an embodiment of the current collecting device of the present invention;
FIG. 2 is a front view of one embodiment of the current collection device of FIG. 1;
FIG. 3 is a left side view of one embodiment of the current collection device of FIG. 1;
fig. 4 is a structural diagram of an embodiment of the current monitoring system of the present invention;
fig. 5 is a structural diagram of an embodiment of an edge computing service device of the current monitoring system of the present invention;
fig. 6 is a flowchart illustrating an embodiment of the current monitoring system of the present invention.
In the figure: 10. a current sensor; 20. a collection unit; 30. a power source; 11. an opening; 12. a screw hole; 21. a housing; 22. a first antenna; 23. a waterproof joint; 31. a magnetic field induction generator; 311. an induction coil; 32. a wind power generator; 41. a chassis; 42. a second antenna.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.
Please refer to fig. 1, 2 and 3, wherein fig. 1 is a structural diagram of an embodiment of the current collecting device of the present invention; FIG. 2 is a front view of one embodiment of the current collection device of FIG. 1; fig. 3 is a left side view of an embodiment of the current collection device of fig. 1. The current collecting device of the present invention will be described in detail with reference to fig. 1, fig. 2, and fig. 3.
In the embodiment, the current collecting device is applied to current monitoring of a grounding wire of a transformer core clamp, the current collecting device comprises a current sensor 10, a collecting unit 20 and a power supply 30, and the collecting unit 20 is electrically connected with the current sensor 10 and the power supply 30 respectively; the current sensor 10 is provided with an opening 11 penetrating through two parallel side surfaces, a grounding wire penetrates through the opening 11, and one end of the current sensor 10 is electrically connected with the acquisition unit 20. The power supply 30 comprises a battery, a magnetic field induction generator 31 and a wind driven generator 32, the magnetic field induction generator 31 is rotatably fixed at one end of the acquisition unit 20 far away from the current sensor 10, an induction coil 311 is arranged inside the magnetic field induction generator 31, the magnetic field of the transformer penetrates through the induction coil 311, the wind driven generator 32 is arranged at one end of the magnetic field induction generator 31 far away from the current sensor 10, and the battery stores the current transmitted by the magnetic field induction generator 31 and the wind driven generator 32 and supplies power to the acquisition unit 20 electrically connected with the battery; the acquisition unit 20 is fixed between the current sensor 10 and the magnetic field induction generator 31, and the current signal of the iron core clamp grounding wire acquired by the current sensor 10 is sent to the edge calculation service device through the acquisition unit 20, and then the current signal is sent to the remote monitoring platform through the edge calculation service device.
In this embodiment, the current sensor 10 is an open-close type current sensor, and the current sensor 10 collects a micro current flowing through a grounding down-lead of an iron core clamp of an electrical device (mainly, a transformer), and sends the micro current to the collecting unit 20 through a shielding signal line.
In a preferred embodiment, the current sensor 10 can be a detachable through-type high-precision current sensor, the size of the opening 11 reaches 10.5 × 2.5cm, the measurement range is 0.1mA-20A, various field requirements are met, and the current sensor can be directly fixed on a grounding wire of an iron core clamp without disconnecting the grounding wire of the iron core clamp of the transformer, so that the installation and maintenance work is facilitated, and the disconnection risk of the grounding wires of the iron core and the clamp is avoided.
In addition, the open-close type current sensor 10 is also matched with a metal protective shell, so that interference signals can be shielded, and the rain and wind can be prevented.
In this embodiment, two opposite bosses are disposed on two sides of one end of the opening 11 of the current sensor 10, at least one screw hole 12 penetrating through the bosses is disposed on the bosses, the screw holes 12 on the two bosses are opposite to each other, the screw hole 12 is perpendicular to the opening 11, and the current collecting device is fixed on the ground wire by a screw penetrating through the screw hole 12.
In this embodiment, the number of the screw holes 12 penetrating through the boss is 3, and in other embodiments, the number of the screw holes 12 may also be 1, 2, or other numbers, which is not limited herein.
The acquisition unit 20 disposed at one end of the electric quantity sensor includes a housing 21, an acquisition circuit, a first antenna 22, and at least one waterproof connector 23. One end of the current sensor 10 is fixed to one side of the housing 21, and the magnetic field induction generator 31 is fixed to one side of the housing 21 away from the current sensor 10 and opposite to the current sensor 10. The energy storage module of the power supply 30 is fixed inside the housing 21.
In the present embodiment, the housing 21 is a rectangular housing, and in other embodiments, the housing 21 may also be a diamond shape, a cylindrical shape, a prism shape, and other shapes, which are not limited herein.
In the present embodiment, the housing 21 is a metal case for preventing interference.
In this embodiment, the acquisition circuit includes an operational amplifier circuit, an analog-to-digital conversion circuit, and a single chip, and the acquisition unit 20 is electrically connected to the current sensor 10 through the acquisition circuit. The operational amplifier circuit amplifies the current signal output by the current sensor 10, the analog-to-digital conversion circuit converts the current signal into a digital signal which can be received by the single chip microcomputer, and the single chip microcomputer processes the digital signal and then sends the processed digital signal to the edge computing service device through the first antenna 22.
In this embodiment, the analog-to-digital conversion circuit is a 16-bit high-precision analog-to-digital conversion chip, and the model thereof may be AD7705, AD77006, AD7707, AD976A, or other models, and a user may set the analog-to-digital conversion circuit according to his own needs, which is not limited herein.
In a preferred embodiment, the single chip microcomputer may be an STM32 series single chip microcomputer, in other embodiments, the single chip microcomputer may also be an STM8 series single chip microcomputer or other types of single chip microcomputers, and only the single chip microcomputer is required to process the current signal output by the analog-to-digital conversion circuit, which is not limited herein.
In this embodiment, the acquisition circuit further comprises a temperature and humidity measurement module, the temperature and humidity measurement module is connected with the single chip microcomputer, the temperature and humidity of the environment where the current collector is located are measured through the temperature and humidity measurement module, the influence of the temperature and humidity on the current sensor 10 and the acquisition circuit is obtained and determined through the environment temperature and humidity and experimental data, compensation is automatically performed when the current acquisition device operates on site, acquisition is more accurate, and the linearity and stability of data acquisition are guaranteed.
And still be provided with cooling system and dehumidification system in current collection device inside, collection circuit controls cooling system and dehumidification system work according to the humiture that acquires to make current collection device inside be in good operational environment, thereby improve its job stabilization nature.
The first antenna 22 is disposed on one side of the housing 21, and a side surface of the first antenna 22 is perpendicular to a side surface of the current sensor 10 and parallel to a side surface of the waterproof connector 23. The first antenna 22 is electrically connected to the acquisition circuit, and the current signal acquired by the acquisition circuit is transmitted to the edge computing device via the first antenna 22.
In this embodiment, the waterproof connector 23 is electrically connected to a single chip of the acquisition circuit, and the single chip sends the processed current signal of the ground wire to other devices connected to the waterproof connector 23.
In this embodiment, the number of the waterproof joints 23 is 2, one is an optical fiber communication interface, and the other is a charging interface, and the two interfaces can be interchanged.
In order to realize diversification of communication modes, the single chip microcomputer of the acquisition circuit supports 485, CAN, Ethernet, wireless network and other communication modes, and supports IEC61850, IEC104 and other various communication protocols.
The field induction generator 31 includes a rectangular box, one end of which protrudes in a direction close to the pickup unit 20 to form a protruding end, and at least one induction coil 311, which is rotatably fixed to the housing 21 of the pickup unit 20. Through the protruding end, the rectangular frame can rotate relative to the protruding end, so that the angle of the induction coil 311 in the rectangular frame for cutting a magnetic field is adjusted, and the power generation efficiency of the induction generator is improved. In the present embodiment, the induction coil 311 is disposed in a rectangular frame, and when the induction coil 311 has a plurality of induction coils, the plurality of induction coils 311 are disposed side by side in the rectangular frame.
In this embodiment, the energy storage module is a battery, wherein the battery is a button battery, and the types of the battery may be a lithium battery, a nickel-hydrogen battery, a nickel-cadmium battery, and other types of rechargeable batteries, which are not described herein again.
In this embodiment, in consideration of the power supply capability of the magnetic field induction generator 31 and the wind driven generator 32, the current collection device adopts a low power consumption strategy, that is, the collection circuit of the collection unit 20 adopts an interval working mode, enters a sleep mode after once collection, and is awakened by a timer in the single chip microcomputer to enter the next collection. Meanwhile, the voltage of the energy storage module is detected when the current signal acquired by the current sensor 10 is acquired, and the interval time of the timer is adjusted according to the voltage. In the sleeping process, the operational amplifier circuit of the acquisition circuit is in a continuous working state, and if the current mutation is found, the singlechip of the acquisition circuit is immediately awakened to work.
In this embodiment, the voltage of the energy storage module may be divided into several different levels according to the level, and different collection frequencies may be set according to the different levels. Wherein, the higher the voltage level, the higher the acquisition frequency, and the lower the voltage level, the lower the acquisition frequency.
The utility model provides a current acquisition device has following advantage:
(1) the opening-closing type current sensor has the opening-closing size of 10.5 x 2.5cm, can be installed in an electrified mode, and does not need to change the structure of the body.
(2) The acquisition circuit adopts a 16-bit high-precision AD conversion circuit.
(3) Various designs of filtering and anti-interference are combined in consideration of the use environment of the system.
(4) The communication mode is diversified, and 485, CAN, Ethernet, wireless network and the like are supported.
(5) Mature lightning protection circuits are additionally arranged in various communication modes, and the reliability of the system is improved.
(6) The optical fiber communication interface is arranged according to the use environment of the field and the requirements of users. The communication is not limited by distance, and the reliability of the communication is enhanced.
(4) The current acquisition device is provided with a charging interface and an optical fiber interface respectively, the charging interface is communicated with the optical fiber interface, and other equipment can be directly contacted with an upper computer through the network interface of the system.
(5) The monitoring device supports various communication protocols, IEC61850, IEC104 and the like.
(6) 1-3 communication channels are configured, and the number of the channels can meet different requirements of users.
(7) The temperature and humidity inside the box body are monitored in real time through the embedded system, and the heat dissipation system and the dehumidification system are controlled in real time, so that the device can still work safely and reliably under severe environmental conditions.
(8) The continuous monitoring and recording of the current of the grounding wire of the transformer core clamp are realized, and the device has the functions of data acquisition, analysis, monitoring and alarming, self-checking and self-starting.
Has the advantages that: the current of the iron core clamp grounding wire of the transformer is collected through the current sensor, the real-time monitoring of the grounding current is realized, the manual monitoring is not needed, the workload is reduced, the real-time acquisition of information is ensured, and the automatic acquisition of electric energy is realized through the generator and the energy storage module arranged on the current sensor, so that the grounding current can be monitored for a long time, and the potential electricity utilization hazard is avoided.
Based on the same concept, the utility model discloses still provide a current monitoring system, please refer to fig. 4, fig. 5, fig. 6, fig. 4 is the utility model discloses the structure chart of the embodiment of current monitoring system, fig. 5 is the utility model discloses current monitoring system's edge computing service device's structure chart of an embodiment, fig. 6 is the utility model discloses the work flow chart of the embodiment of current monitoring system. The current monitoring system of the present invention will be described in detail with reference to fig. 4, 5, and 6.
The sound current monitoring system of the utility model comprises any one of the current collecting device, the edge calculation service device and the remote monitoring platform,
the edge computing service device receives a current signal of a grounding wire sent by the current collecting device, encrypts the current signal and sends the current signal to the remote monitoring platform.
In this embodiment, the edge computing service device applies edge proxy IPK authentication, which solves the problem of secure access control of the current collection device and ensures the communication security of the internal and external networks when the internet of things is applied. The edge computing service device supports on-site synchronous acquisition, multi-acquisition-point collection, cooperative control, simultaneous access of local area networking and wireless private network, and safe access of SCADA data, realizes data optimization of the Internet of things and block storage of local and background multi-ground linkage, and can be effectively applied to realize edge computing. The edge computing service device provides a proxy forwarding and safety access technology in the system, only current information of a grounding wire which is useful for a remote monitoring platform is extracted through encryption chip and protocol analysis when the current acquisition device and the remote monitoring platform are communicated, redundant information is uniformly filtered, the safety of a remote monitoring platform network is ensured, the edge computing service device also provides big data analysis and calculation, analyzes data sent by all the current acquisition devices, and analyzes the change of current signal data of the grounding wire in different environments of different time, different temperature, different humidity and the like.
In this embodiment, the edge computing service device includes a chassis 41, an edge computing server, a second antenna 42 and a protocol converter, and the edge computing service device is connected to the current collecting device through the second antenna 42, wherein the second antenna 42 is fixed on the chassis 41, the edge computing server is electrically connected to the protocol converter, and both are disposed inside the chassis 41.
In this embodiment, the current collection device and the edge computing server are connected through wireless communication, and the communication frequency between the current collection device and the edge computing server is 433 MHZ.
In this embodiment, the information may be transmitted between the remote monitoring platform and the edge computing service device in a wired or wireless manner.
And the remote monitoring platform receives the encrypted current signal, monitors the current value of the grounding wire and records an alarm event. The remote monitoring platform adopts a wired transmission mode, supports an IEC61850/104 protocol, monitors a trend graph and real-time data provided by the edge computing server or generates a current change trend graph according to real-time current signal data of a ground wire provided by the edge computing server, can remotely set an alarm value of the system, gives an alarm when the current signal reaches the alarm value, and records the alarm event.
In this embodiment, the remote monitoring platform may be an intelligent terminal, such as a computer, a tablet computer, or a mobile phone, capable of displaying the acquired current signal data, generating a relevant trend graph, and alarming, which is not limited herein.
The utility model discloses a current monitoring system can realize the continuous monitoring and the record of transformer core folder earth wire current, has data acquisition, analysis, supervision and warning, self-checking, self-starting function. A dedicated remote monitoring platform is configured. The monitoring platform provides a trend graph for online monitoring and real-time monitoring data. The historical trend graph can be checked in a time-sharing mode, and a reliable basis is provided for fault analysis. An alarm event can be recorded. The operator can manually reset the alarm. The system state of the transformer is monitored in real time, potential faults are found in time, the system is automatically recovered after the faults are eliminated, and the system has the characteristic of being free of maintenance.
Has the advantages that: the utility model discloses an on-line monitoring system adopts remote monitoring platform and current collection device to combine the mode of the current signal of real-time acquisition earth connection, carries out parameter setting, provides system running state and fault information etc. makes the control personnel can master the current operating condition of transformer at any time, avoids the machine halt detection of transformer, has saved manpower, material resources, very big improvement the reliability and the economic nature of transformer operation, has avoided the potential safety hazard simultaneously, can realize substation unmanned on duty.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.
Claims (10)
1. A current collecting device is characterized in that the current collecting device is applied to current monitoring of a grounding wire of a transformer core clamping piece, and comprises a current sensor, a collecting unit and a power supply, wherein the collecting unit is electrically connected with the current sensor and the power supply respectively;
the current sensor is provided with an opening penetrating through two parallel side surfaces, the grounding wire penetrates through the opening, and one end of the current sensor is electrically connected with the acquisition unit;
the power supply comprises an energy storage module, a magnetic field induction generator and a wind driven generator, the magnetic field induction generator is rotatably fixed at one end, far away from the current sensor, of the acquisition unit, an induction coil is arranged inside the magnetic field induction generator, a magnetic field of the transformer penetrates through the induction coil, the wind driven generator is arranged at one end, far away from the current sensor, of the magnetic field induction generator, and the energy storage module stores current transmitted by the magnetic field induction generator and the wind driven generator and supplies power to the acquisition unit electrically connected with the energy storage module;
the acquisition unit is fixed between the current sensor and the magnetic field induction generator, and sends a current signal of an iron core clamp grounding wire acquired by the current sensor to the edge calculation service device through the acquisition unit, and then sends the current signal to the remote monitoring platform through the edge calculation service device.
2. The current collection device according to claim 1, wherein said opening has two opposing bosses at one end, said bosses having at least one screw hole extending therethrough, said screw hole being perpendicular to said opening, said current collection device being secured to said ground line by said screw hole.
3. The current collection device of claim 1, wherein the collection unit comprises a housing, the current sensor is fixed at one end to one side of the housing, the magnetic field induction generator is fixed to a side of the housing away from the current sensor, and the energy storage module is fixed inside the housing.
4. The current collection device of claim 3, wherein the collection unit further comprises a collection circuit, the collection circuit comprises an operational amplifier circuit, an analog-to-digital conversion circuit and a single chip, and the collection unit is electrically connected with the current sensor through the collection circuit.
5. The current collection device of claim 4, wherein the collection unit further comprises a first antenna, the first antenna is fixed to one side of the housing, the first antenna is electrically connected to the collection circuit, and the current signal collected by the collection circuit is transmitted to the edge computing service device through the first antenna.
6. The current collection device of claim 5, wherein the collection unit further comprises at least one watertight connector disposed on a side of the housing opposite the first antenna, the watertight connector being electrically connected to the collection circuit, the watertight connector transmitting the current signal collected by the collection circuit.
7. The current collection device of claim 1, wherein the magnetic field induction generator comprises a rectangular box, one end of the rectangular box protrudes in a direction close to the collection unit to form a protruding end, and the protruding end is rotatably fixed on the collection unit.
8. The current-drawing device of claim 7, wherein the induction coils are arranged side-by-side within the rectangular box.
9. A current monitoring system, characterized in that the current monitoring system is applied to current monitoring of a grounding wire of a transformer core clamp, and comprises an edge computing service device, a remote monitoring platform and a current collecting device as claimed in any one of claims 1-8;
the edge computing service device receives a current signal of a grounding wire sent by the current collecting device, encrypts the current signal and sends the current signal to the remote monitoring platform;
and the remote monitoring platform receives the current signal after encryption processing, monitors the current value of the grounding wire and records an alarm event.
10. The current monitoring system of claim 9, wherein the edge computing service device comprises a chassis, an edge computing server, a second antenna, and a protocol converter, the edge computing server and the protocol converter being disposed inside the chassis, the edge computing service device being communicatively coupled to the current collection device via the second antenna.
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| CN201921329164.3U CN211148776U (en) | 2019-08-15 | 2019-08-15 | Current acquisition device and current monitoring system |
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| CN201921329164.3U CN211148776U (en) | 2019-08-15 | 2019-08-15 | Current acquisition device and current monitoring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114710803A (en) * | 2022-06-07 | 2022-07-05 | 武汉慧联无限科技有限公司 | Monitoring method, device, equipment, system and storage medium for base station antenna |
| CN115616277A (en) * | 2022-01-10 | 2023-01-17 | 荣耀终端有限公司 | Monitoring circuit and monitoring system |
-
2019
- 2019-08-15 CN CN201921329164.3U patent/CN211148776U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115616277A (en) * | 2022-01-10 | 2023-01-17 | 荣耀终端有限公司 | Monitoring circuit and monitoring system |
| CN115616277B (en) * | 2022-01-10 | 2023-09-22 | 荣耀终端有限公司 | Monitoring circuit and monitoring system |
| CN114710803A (en) * | 2022-06-07 | 2022-07-05 | 武汉慧联无限科技有限公司 | Monitoring method, device, equipment, system and storage medium for base station antenna |
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