CN112993770A - Electric automatization switch board alarm system and device - Google Patents
Electric automatization switch board alarm system and device Download PDFInfo
- Publication number
- CN112993770A CN112993770A CN202110517634.4A CN202110517634A CN112993770A CN 112993770 A CN112993770 A CN 112993770A CN 202110517634 A CN202110517634 A CN 202110517634A CN 112993770 A CN112993770 A CN 112993770A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Human Computer Interaction (AREA)
- Fire Alarms (AREA)
Abstract
The invention discloses an electric automatic power distribution cabinet alarm system and a device, comprising an electric parameter module, a temperature and humidity acquisition module, a smoke induction module, a data converter, a processor, a PLC controller, a wireless transmission module, a mobile terminal, a data storage module, an alarm module, an emergency maintenance device, an intelligent identification module, a comparator, a fault monitoring module, a positioning module and a fault information storage module, wherein the invention designs the intelligent alarm system which can carry out real-time safety monitoring, remote control, real-time positioning, fault recording, intelligent identification and emergency maintenance on a power distribution cabinet, can facilitate workers to rapidly acquire the fault information of the power distribution cabinet and the position of the power distribution cabinet with the fault according to the mobile terminal, can also control the emergency maintenance device through the mobile terminal, and can carry out some remedial measures in time, and the authority of remote control is limited through the intelligent identification function, so that the safety is higher.
Description
Technical Field
The invention belongs to the technical field of electric automation power distribution cabinet alarming, and particularly relates to an electric automation power distribution cabinet alarming system and device.
Background
The distribution cabinet is a final-stage device of a distribution system. The power distribution cabinet is a general name of a motor control center. The power distribution cabinet is used in the occasions with dispersed loads and less loops; the motor control center is used for occasions with concentrated loads and more loops. They distribute the power of a certain circuit of the upper-level distribution equipment to the nearby loads. This level of equipment should provide protection, monitoring and control of the load. The primary power distribution equipment is commonly called a power distribution center. They are installed centrally in substations of enterprises to distribute electric energy to subordinate distribution equipment at different sites. The equipment of this stage is close to the step-down transformer, so the requirement of electrical parameters is higher, and the capacity of an output circuit is also higher. The secondary distribution equipment is a general name of a power distribution cabinet and a motor control center. The power distribution cabinet is used in the occasions with dispersed loads and less loops; the motor control center is used for occasions with concentrated loads and more loops. They distribute the power of a certain circuit of the upper-level distribution equipment to the nearby loads. This level of equipment should provide protection, monitoring and control of the load. The final distribution equipment is collectively referred to as a lighting power distribution box. They are located far from the power supply center and are distributed small-capacity power distribution equipment.
The existing electric automation power distribution cabinet can generate various problems in the long-time operation process, the problems can not be fed back to workers in time, the electric automation power distribution cabinet can be damaged, and the design of an electric automation power distribution cabinet alarm system is particularly important.
Disclosure of Invention
The invention aims to provide an electric automation power distribution cabinet alarm system and device to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an electric automation power distribution cabinet alarm system and device comprises an electric parameter module, a temperature and humidity acquisition module, a smoke induction module, a data converter, a processor, a PLC (programmable logic controller), a wireless transmission module, a mobile terminal, a data storage module, an alarm module, an emergency maintenance device, an intelligent identification module, a comparator, a fault monitoring module, a positioning module and a fault information storage module, wherein the electric parameter module, the temperature and humidity acquisition module and the smoke induction module are respectively used for acquiring electric parameter information of a power receiving cabinet, temperature and humidity information in a power distribution cabinet and smoke concentration information in the power distribution cabinet and are all installed in the power distribution cabinet, and the electric parameter module, the temperature and humidity acquisition module and the smoke induction module are all connected with the data converter through serial ports and convert acquired analog signals into digital signals;
the data converter is connected with the processor through a serial port and is used for transmitting the converted digital signals to the processor, and the processor performs analysis operation on the transmitted digital signals; the data storage module and the comparator are both connected with the data converter, and the comparator is used for presetting an alert comparison data value, converting the alert comparison data value with data stored in the data storage module through the data converter and then transmitting the alert comparison data value to the processor for operation comparison;
the PLC is connected with the mobile terminal through a wireless transmission module to realize the sending of a remote control command; the PLC is connected with the emergency maintenance device and can control the work of the emergency maintenance device;
the fault monitoring module is connected with the data converter through a serial port and used for monitoring fault data information of the power distribution cabinet and converting the fault data information into digital signals to be transmitted to the processor for analysis, and the processor is connected with the fault information storage module and can store analyzed data in the fault information storage module;
the intelligent identification module is connected with the mobile terminal through the wireless transmission module and is used for transmitting face or fingerprint information, so that remote control is limited by permission;
the alarm module is connected with the PLC and can control the alarm module to send alarm information, and the alarm module is connected with the mobile terminal through the wireless transmission module and transmits the alarm information to the mobile terminal; the positioning module is connected with the PLC and controls the positioning module to position, and positioning information of the positioning module is transmitted to the mobile terminal through the wireless transmission module.
Preferably, the emergency maintenance device comprises a cabinet body, heat dissipation grids are arranged on two sides of the cabinet body, a sealing movable plate is arranged at an inner side opening of each heat dissipation grid, a movable seat is arranged at a joint of an inner side edge of each heat dissipation grid and the corresponding sealing movable plate, the sealing movable plates are connected with the movable seats in a sliding mode, one end of each sealing movable plate is connected with the corresponding air cylinder through a telescopic rod, a vent is arranged at the top of the cabinet body, an electric valve is arranged at an outer side opening of the vent, a heat dissipation fan is arranged at an inner side opening of the cabinet body relative to the vent, a mounting seat is arranged at a joint of the heat dissipation fan and the cabinet body, the heat dissipation fan and the cabinet body are fixedly connected through the mounting seat, a fire extinguishing nozzle is arranged on one side inside the cabinet body, and the output port of the delivery pump is communicated with the fire extinguishing nozzle through a hose.
Preferably, the temperature and humidity acquisition module comprises a temperature sensor and a humidity sensor, and the comparator is provided with a storage unit.
Preferably, the mobile terminal can be a smart phone or a tablet computer, and the smart phone or the tablet computer is provided with a camera and a fingerprint identification device.
Preferably, the intelligent identification module is provided with a storage module for storing face and fingerprint information, the intelligent identification module is further provided with a data processing unit A, and the alarm module is provided with a data processing unit B.
Compared with the prior art, the invention has the beneficial effects that: the intelligent alarm system capable of carrying out real-time safety monitoring, remote control, real-time positioning, fault recording, intelligent identification and emergency maintenance on the distribution box is designed, so that workers can conveniently and quickly acquire the fault information of the distribution box and the position of the power distribution box with the fault according to the mobile terminal, the emergency maintenance device can be controlled through the mobile terminal, remedial measures can be timely carried out, the situation that the power distribution box is further damaged to cause larger loss is avoided, and the authority of the remote control is limited through the intelligent identification function, and the safety is higher.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
fig. 2 is a schematic structural diagram of an emergency maintenance device of a power distribution cabinet according to the present invention;
FIG. 3 is a side view of the movable sealing plate of the present invention;
in the figure: 1. a cabinet body; 2. sealing the movable plate; 3. a mounting seat; 4. a vent; 5. an electrically operated valve; 6. a heat radiation fan; 7. a heat dissipation grid; 8. a movable seat; 9. a cylinder; 10. a telescopic rod; 11. a fire extinguishing agent storage bucket; 12. a delivery pump; 13. a fire extinguishing nozzle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1 to 3, the present invention provides a technical solution: an electric automation power distribution cabinet alarm system and device comprises an electric parameter module, a temperature and humidity acquisition module, a smoke induction module, a data converter, a processor, a PLC (programmable logic controller), a wireless transmission module, a mobile terminal, a data storage module, an alarm module, an emergency maintenance device, an intelligent identification module, a comparator, a fault monitoring module, a positioning module and a fault information storage module, wherein the electric parameter module, the temperature and humidity acquisition module and the smoke induction module are respectively used for acquiring electric parameter information of a power receiving cabinet, temperature and humidity information in a power distribution cabinet and smoke concentration information in the power distribution cabinet and are all installed in the power distribution cabinet;
the data converter is connected with the processor through a serial port and is used for transmitting the converted digital signals to the processor, and the processor performs analysis operation on the transmitted digital signals; the data storage module and the comparator are connected with the data converter, and the comparator is used for presetting an alert comparison data value, converting the alert comparison data value with data stored in the data storage module through the data converter and then transmitting the alert comparison data value into the processor for operation comparison;
the PLC is connected with the mobile terminal through a wireless transmission module to realize the sending of a remote control command; the PLC is connected with the emergency maintenance device and can control the work of the emergency maintenance device;
the fault monitoring module is connected with the data converter through a serial port and used for monitoring fault data information of the power distribution cabinet and converting the fault data information into digital signals to be transmitted to the processor for analysis, and the processor is connected with the fault information storage module and can store analyzed data in the fault information storage module;
the intelligent identification module is connected with the mobile terminal through the wireless transmission module and is used for transmitting face or fingerprint information, so that remote control is limited by permission;
the alarm module is connected with the PLC and can control the alarm module to send alarm information, and the alarm module is connected with the mobile terminal through the wireless transmission module and transmits the alarm information to the mobile terminal; the positioning module is connected with the PLC and controls the positioning module to position, and positioning information of the positioning module is transmitted to the mobile terminal through the wireless transmission module.
In this embodiment, preferably, the emergency maintenance device includes a cabinet 1, heat dissipation grills 7 are disposed on both sides of the cabinet 1, a movable sealing plate 2 is disposed at an inner opening of each heat dissipation grill 7, a movable seat 8 is disposed at a joint of an inner edge of each heat dissipation grill 7 and the movable sealing plate 2, the movable sealing plate 2 is slidably connected to the movable seat 8, one end of each movable sealing plate 2 is connected to a cylinder 9 through a telescopic rod 10, a vent 4 is disposed at a top of the cabinet 1, an electric valve 5 is disposed at an outer opening of the vent 4, a heat dissipation fan 6 is disposed at an inner opening of the cabinet 1 opposite to the vent 4, a mounting seat 3 is disposed at a joint of the heat dissipation fan 6 and the cabinet 1, and the heat dissipation fan 6 and the cabinet 1 are fixedly connected through the mounting seat 3, in order to control whether the heat dissipation fan 6 and the electric valve, the inside one side of the cabinet body 1 is provided with a fire extinguishing nozzle 13, the top of the cabinet body 1 is provided with a delivery pump 12, the input port of the delivery pump 12 is connected with a fire extinguishing agent storage barrel 11, and the output port of the delivery pump 12 is communicated with the fire extinguishing nozzle 13 through a hose, so that emergency fire extinguishing is facilitated.
In this embodiment, preferably, the temperature and humidity acquisition module includes a temperature sensor and a humidity sensor, and the comparator is provided with a storage unit, so as to conveniently store the preset warning data, so that the data acquired by the temperature and humidity acquisition module and the preset warning data of the comparator are compared and analyzed by the processor, and a corresponding instruction is sent.
In this embodiment, preferably, the mobile terminal may be a smart phone or a tablet computer, and the smart phone or the tablet computer is provided with a camera and a fingerprint identification device, so as to conveniently collect face and fingerprint information.
In this embodiment, preferably, the intelligent recognition module is provided with a storage module for storing the face and fingerprint information, the intelligent recognition module is further provided with a data processing unit a for analyzing the transmitted face and fingerprint data information, and the alarm module is provided with a data processing unit B for processing the instruction information received by the alarm module.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides an electric automatization switch board alarm system and device which characterized in that: the intelligent monitoring system comprises an electric parameter module, a temperature and humidity acquisition module, a smoke induction module, a data converter, a processor, a PLC (programmable logic controller), a wireless transmission module, a mobile terminal, a data storage module, an alarm module, an emergency maintenance device, an intelligent identification module, a comparator, a fault monitoring module, a positioning module and a fault information storage module, wherein the electric parameter module, the temperature and humidity acquisition module and the smoke induction module are respectively used for acquiring electric parameter information of a power receiving cabinet, temperature and humidity information in a power distribution cabinet and smoke concentration information in the power distribution cabinet and are all installed in the power distribution cabinet, and the electric parameter module, the temperature and humidity acquisition module and the smoke induction module are all connected with the data converter through serial ports to convert acquired analog signals into digital signals;
the data converter is connected with the processor through a serial port and is used for transmitting the converted digital signals to the processor, and the processor performs analysis operation on the transmitted digital signals; the data storage module and the comparator are both connected with the data converter, and the comparator is used for presetting an alert comparison data value, converting the alert comparison data value with data stored in the data storage module through the data converter and then transmitting the alert comparison data value to the processor for operation comparison;
the PLC is connected with the mobile terminal through a wireless transmission module to realize the sending of a remote control command; the PLC is connected with the emergency maintenance device and can control the work of the emergency maintenance device;
the fault monitoring module is connected with the data converter through a serial port and used for monitoring fault data information of the power distribution cabinet and converting the fault data information into digital signals to be transmitted to the processor for analysis, and the processor is connected with the fault information storage module and can store analyzed data in the fault information storage module;
the intelligent identification module is connected with the mobile terminal through the wireless transmission module and is used for transmitting face or fingerprint information, so that remote control is limited by permission;
the alarm module is connected with the PLC and can control the alarm module to send alarm information, and the alarm module is connected with the mobile terminal through the wireless transmission module and transmits the alarm information to the mobile terminal; the positioning module is connected with the PLC and controls the positioning module to position, and positioning information of the positioning module is transmitted to the mobile terminal through the wireless transmission module.
2. The electrical automation switch board alarm system and device of claim 1, characterized in that: the emergency maintenance device comprises a cabinet body (1), wherein heat dissipation grids (7) are arranged on two sides of the cabinet body (1), a sealing movable plate (2) is arranged at an inner side opening of each heat dissipation grid (7), a movable seat (8) is arranged at a joint of an inner side edge of each heat dissipation grid (7) and the corresponding sealing movable plate (2), the sealing movable plates (2) are slidably connected with the movable seats (8), one end of each sealing movable plate (2) is connected with a cylinder (9) through a telescopic rod (10), a vent (4) is arranged at the top of the cabinet body (1), an electric valve (5) is arranged at an outer side opening of the vent (4), a heat dissipation fan (6) is arranged at an inner side opening of the vent (4) in the cabinet body (1), and a mounting seat (3) is arranged at a joint of the heat dissipation fan (6) and the cabinet, and radiator fan (6) and the cabinet body (1) are through mount pad (3) fixed connection, the inside one side of the cabinet body (1) is provided with fire extinguishing nozzle (13), the top of the cabinet body (1) is provided with delivery pump (12), the input connection of delivery pump (12) has fire extinguishing agent to store bucket (11), and the delivery outlet of delivery pump (12) passes through hose and fire extinguishing nozzle (13) intercommunication.
3. The electrical automation switch board alarm system and device of claim 1, characterized in that: the temperature and humidity acquisition module comprises a temperature sensor and a humidity sensor, and a storage unit is arranged on the comparator.
4. The electrical automation switch board alarm system and device of claim 1, characterized in that: the mobile terminal can be a smart phone or a tablet personal computer, and the smart phone or the tablet personal computer is provided with a camera and a fingerprint identification device.
5. The electrical automation switch board alarm system and device of claim 1, characterized in that: the intelligent recognition module is provided with a storage module for storing face and fingerprint information, the intelligent recognition module is also provided with a data processing unit A, and the alarm module is provided with a data processing unit B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110517634.4A CN112993770A (en) | 2021-05-12 | 2021-05-12 | Electric automatization switch board alarm system and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110517634.4A CN112993770A (en) | 2021-05-12 | 2021-05-12 | Electric automatization switch board alarm system and device |
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| Publication Number | Publication Date |
|---|---|
| CN112993770A true CN112993770A (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110517634.4A Pending CN112993770A (en) | 2021-05-12 | 2021-05-12 | Electric automatization switch board alarm system and device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113629864A (en) * | 2021-07-26 | 2021-11-09 | 上海幸颐智能科技有限公司 | Power distribution cabinet intelligent safety management system based on 5G base station |
| CN113703343A (en) * | 2021-08-26 | 2021-11-26 | 湖南华沣科贸有限公司 | Intelligent control terminal |
| CN113759202A (en) * | 2021-11-08 | 2021-12-07 | 西安交通大学城市学院 | Electric automatization switch board safety monitoring device and system |
| CN115033080A (en) * | 2022-05-30 | 2022-09-09 | 辽宁科技大学 | Intelligent alarm device of portable computer |
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| CN107863708A (en) * | 2017-11-13 | 2018-03-30 | 湖南湘讯企业管理有限公司 | A kind of dust-proof radiating electric power cabinet with fire-extinguishing function concurrently |
| CN110264679A (en) * | 2019-06-18 | 2019-09-20 | 国网山东省电力公司沂南县供电公司 | Power distribution cabinet monitors system and method |
| CN111628418A (en) * | 2020-06-10 | 2020-09-04 | 江西明正变电设备有限公司 | Alarm system of high-low voltage power equipment |
| WO2021027322A1 (en) * | 2019-08-13 | 2021-02-18 | 华为技术有限公司 | Cabinet and cabinet group |
| CN112614327A (en) * | 2020-12-30 | 2021-04-06 | 江苏超越新能源科技集团股份有限公司 | Current voltage data acquisition system for ring main unit and acquisition method thereof |
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2021
- 2021-05-12 CN CN202110517634.4A patent/CN112993770A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107863708A (en) * | 2017-11-13 | 2018-03-30 | 湖南湘讯企业管理有限公司 | A kind of dust-proof radiating electric power cabinet with fire-extinguishing function concurrently |
| CN110264679A (en) * | 2019-06-18 | 2019-09-20 | 国网山东省电力公司沂南县供电公司 | Power distribution cabinet monitors system and method |
| WO2021027322A1 (en) * | 2019-08-13 | 2021-02-18 | 华为技术有限公司 | Cabinet and cabinet group |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113629864A (en) * | 2021-07-26 | 2021-11-09 | 上海幸颐智能科技有限公司 | Power distribution cabinet intelligent safety management system based on 5G base station |
| CN113703343A (en) * | 2021-08-26 | 2021-11-26 | 湖南华沣科贸有限公司 | Intelligent control terminal |
| CN113759202A (en) * | 2021-11-08 | 2021-12-07 | 西安交通大学城市学院 | Electric automatization switch board safety monitoring device and system |
| CN115033080A (en) * | 2022-05-30 | 2022-09-09 | 辽宁科技大学 | Intelligent alarm device of portable computer |
| CN115033080B (en) * | 2022-05-30 | 2023-07-21 | 辽宁科技大学 | Intelligent alarm device of portable computer |
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Application publication date: 20210618 |
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