CN115601015A - Transformer substation control cabinet humidity monitoring and risk early warning system based on digital twinborn - Google Patents
Transformer substation control cabinet humidity monitoring and risk early warning system based on digital twinborn Download PDFInfo
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Abstract
The invention relates to a transformer substation control cabinet humidity monitoring and risk early warning system based on digital twins, which comprises a data acquisition module and a risk assessment module, wherein the data acquisition module comprises an in-cabinet humidity acquisition module and an out-cabinet humidity acquisition module, the in-cabinet humidity acquisition module is used for acquiring an in-cabinet humidity value of a transformer substation control cabinet, and the out-cabinet humidity acquisition module is used for acquiring an out-cabinet humidity value of the transformer substation control cabinet; the risk assessment module includes: a communication module; the parameter setting module is used for acquiring and setting the operation parameters of the whole system; the risk evaluation module is used for substituting the humidity value in the cabinet and the humidity value outside the cabinet into a risk evaluation model to simulate and calculate the humidity state, the dehumidifier state and the dehumidifier performance of the substation control cabinet; and the early warning feedback module is used for sending early warning information according to the calculation result of the risk assessment module. Compared with the prior art, the alarm device can flexibly give an alarm to workers, and has the advantages of low power consumption, wide coverage, high capacity, low cost and the like.
Description
Technical Field
The invention relates to the technical field of humidity early warning of a transformer substation control cabinet, in particular to a humidity monitoring and risk early warning system of the transformer substation control cabinet based on digital twins.
Background
The moisture of the substation control cabinet can cause short circuit, protect misoperation, refusal operation, burn out parts and endanger equipment, a power grid and personal safety. The current early warning main method is as follows: and (3) a manual early warning method, and a control cabinet is opened by an operator on duty during patrol, and humidity is checked for dehumidification. The main problems of the method are that the method is time-consuming, labor-consuming and cannot find hidden dangers in time, and the following risks and problems exist:
1) The humidity of the control cabinet can not be found to exceed the standard in time, so that potential insulation reduction hazards exist in other electric devices in the cabinet, and further equipment short circuit and personal safety risk hazards are caused.
2) The treatment process is complicated, a large amount of manpower and time are occupied, and the working efficiency is low.
3) In order to prevent the dehumidifier from always working and causing overhigh temperature to burn out the device, a specially-assigned person is required to squat and watch to control the starting and stopping of the dehumidifier. Meanwhile, if the starting and stopping are not timely due to negligence of a person on duty of squatting, the dehumidifier still has the risk of burning out the dehumidifier due to continuous work.
Disclosure of Invention
The invention aims to provide a transformer substation control cabinet humidity monitoring and risk early warning system based on digital twinning, aiming at overcoming the defects that the manual early warning method in the prior art is time-consuming, labor-consuming and cannot find hidden dangers in time.
The purpose of the invention can be realized by the following technical scheme:
a transformer substation control cabinet humidity monitoring and risk early warning system based on digital twinning comprises a data acquisition module and a risk assessment module, wherein the data acquisition module comprises an in-cabinet humidity acquisition module and an out-cabinet humidity acquisition module, the in-cabinet humidity acquisition module is used for acquiring an in-cabinet humidity value of a transformer substation control cabinet, and the out-cabinet humidity acquisition module is used for acquiring an out-cabinet humidity value of the transformer substation control cabinet;
the risk assessment module includes:
the communication module is used for communicating with the data acquisition module to acquire acquired data information;
the parameter setting module is used for acquiring and setting the operation parameters of the whole system;
the risk evaluation module is used for substituting the humidity value inside the cabinet and the humidity value outside the cabinet into a preset risk evaluation model to simulate and calculate the humidity state, the dehumidifier state and the dehumidifier performance of the substation control cabinet;
and the early warning feedback module is used for sending early warning information according to the calculation result of the risk assessment module.
Further, the processing procedure of the risk assessment model comprises:
acquiring a humidity value in the cabinet and a humidity value outside the cabinet according to a preset measuring and calculating period;
and if the humidity value in the cabinet is not lower than a preset dehumidifier starting value, controlling the dehumidifier to start, calculating the humidity change rate in the cabinet and the humidity change rate outside the cabinet according to the humidity value in the cabinet and the humidity value outside the cabinet, judging the working state of the dehumidifier in the control cabinet, and judging whether the overrun risk exists according to whether the humidity value in the cabinet reaches a preset early warning set value or not.
Further, the calculation expression of the humidity change rate is:
in the formula (I), the compound is shown in the specification,
in order to the rate of change of the humidity,
is the value of the humidity at the time T,
the humidity value is the humidity value at the time T-delta T, delta T is a time interval, and the time interval delta T is a measuring and calculating period.
Further, the process of determining the risk assessment model specifically includes:
s1: if the humidity value in the cabinet is not lower than the preset dehumidifier starting value, controlling the dehumidifier to start, and executing the step S2 and the step S3;
s2: if the humidity value in the cabinet is larger than a preset humidity standard exceeding threshold value, sending a humidity standard exceeding alarm signal;
s3: the change rate of the humidity in the cabinet is calculated,
if the change rate of the humidity in the cabinet is not lower than 0 and the change rate of the humidity outside the cabinet is lower than the change rate of the humidity in the cabinet, the dehumidifier is in a non-working state and sends a fault alarm signal of the dehumidifier;
if the change rate of the humidity in the cabinet is not lower than 0 and the change rate of the humidity outside the cabinet is higher than the change rate of the humidity in the cabinet, the dehumidifier is in a working state, and an alarm signal indicating that the overrun risk exists is sent out;
if the change rate of the humidity in the cabinet is less than 0, the change rate of the humidity outside the cabinet is less than 0, and the change rate of the humidity outside the cabinet is higher than the change rate of the humidity in the cabinet, no alarm signal is sent out;
and if the change rate of the humidity in the cabinet is less than 0, the change rate of the humidity outside the cabinet is less than 0, and the change rate of the humidity outside the cabinet is lower than the change rate of the humidity in the cabinet, sending a fault early warning signal of the dehumidifier.
Further, the processing procedure of the risk assessment model further includes:
and if the humidity value in the cabinet is lower than the starting value of the dehumidifier, controlling the dehumidifier to be closed.
Further, the data acquisition module still includes MCU microprocessor, lora communication module and power module, humidity acquisition module in the cabinet and humidity acquisition module outside the cabinet are humidity transducer, MCU microprocessor connects respectively humidity acquisition module, humidity acquisition module outside the cabinet, lora communication module and power module, lora communication module connects communication module, MCU microprocessor passes through humidity acquisition module in the cabinet and humidity acquisition module outside the cabinet acquire humidity data, convert humidity data to digital signal, send for risk evaluation module through Lora communication module.
Furthermore, the power supply module is a lithium battery power supply module and is used for converting the voltage of the lithium battery into the working voltage of the MCU.
Furthermore, the data acquisition module also comprises an LED indicator light which is connected with the MCU microprocessor and used for displaying the communication state.
Further, the dehumidifier is a heating device.
Furthermore, the in-cabinet humidity acquisition module is installed in the control cabinet of the transformer substation, and the out-cabinet humidity acquisition module is installed outside the control cabinet of the transformer substation.
Compared with the prior art, the invention has the following advantages:
(1) The invention adopts a mode of one control box and one collection device, and can number each background data collection module and pre-alarm the humidity and the sampling time interval through the upper computer server, thereby reducing the procedure of independently modifying each data collection module and embodying the high efficiency and the accuracy of the system.
(2) According to the invention, the data is monitored in real time through the acquisition module, the data is transmitted by using the Lora communication technology, the background system carries out risk assessment in time, the alarm can be given to the staff more flexibly, and the system has the advantages of low power consumption, wide coverage, large capacity, low cost and the like, so that the system can be widely applied to various vertical technologies, and is particularly suitable for remote monitoring communication scenes.
(3) The data acquisition module disclosed by the invention uses the self-powered lithium battery module, so that the wiring of the cabinet body is avoided, and the electric leakage safety accident can be effectively prevented.
Drawings
FIG. 1 is a schematic diagram of a frame of a humidity monitoring device for a control cabinet according to an embodiment of the present invention;
FIG. 2 is a schematic view of a humidity risk model provided in an embodiment of the present invention;
fig. 3 is a schematic diagram of a humidity monitoring operation and diagnosis process of a control cabinet according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
Example 1
The embodiment provides a transformer substation control cabinet humidity monitoring and risk early warning system based on digital twins, which comprises a data acquisition module and a risk assessment module, wherein the data acquisition module comprises an in-cabinet humidity acquisition module and an out-cabinet humidity acquisition module, the in-cabinet humidity acquisition module is used for acquiring an in-cabinet humidity value of a transformer substation control cabinet, and the out-cabinet humidity acquisition module is used for acquiring an out-cabinet humidity value of the transformer substation control cabinet;
the risk assessment module includes:
the communication module is used for communicating with the data acquisition module to acquire acquired data information;
the parameter setting module is used for acquiring and setting the operation parameters of the whole system;
the risk evaluation module is used for substituting the humidity value in the cabinet and the humidity value outside the cabinet into a preset risk evaluation model to simulate and calculate the humidity state, the dehumidifier state and the dehumidifier performance of the substation control cabinet;
and the early warning feedback module is used for sending early warning information according to the calculation result of the risk assessment module.
The in-cabinet humidity acquisition module is installed in the control cabinet of the transformer substation, and the out-cabinet humidity acquisition module is installed outside the control cabinet of the transformer substation.
In this embodiment, the specific processing procedure of the risk assessment module includes:
1. setting parameters, namely setting parameters such as monitoring frequency, humidity exceeding early warning value, dehumidifier self-starting value and the like in a background parameter setting module of the monitoring system, and bringing related parameters into a risk evaluation module by the system for operation;
2. data acquisition, after the system received the running signal, humidity acquisition module and the outside cabinet humidity acquisition module in the control start cabinet, humidity and the outside cabinet humidity information in the periodic record cabinet.
3. And data interaction, namely acquiring information monitored by the in-cabinet humidity acquisition module and the out-cabinet humidity acquisition module according to the Lora communication technology.
4. And (4) risk assessment, namely bringing the relevant parameters obtained in the steps (1) and (3) and the monitored humidity information inside and outside the cabinet into a risk assessment model, and simulating and calculating the humidity state, the dehumidifier state and the dehumidifier performance.
5. And (4) early warning feedback, namely sending related early warning information including humidity rising speed, humidity overrun risk, humidity overrun remaining time and whether the dehumidifier works normally or not according to the evaluation result of the step 4.
The following is a detailed description.
1. Data acquisition module
The data acquisition module still includes MCU microprocessor, lora communication module and power module, humidity acquisition module and the outside cabinet humidity acquisition module are humidity transducer in the cabinet, MCU microprocessor connects humidity acquisition module in the cabinet respectively, humidity acquisition module outside the cabinet, lora communication module and power module, communication module is connected to Lora communication module, MCU microprocessor gathers module and the outside cabinet humidity acquisition module through humidity in the cabinet and gathers humidity data, convert humidity data into digital signal, send for risk evaluation module through Lora communication module.
Preferably, the power supply module is a lithium battery power supply module and is used for converting the voltage of the lithium battery into the working voltage of the MCU.
Preferably, the data acquisition module further comprises an LED indicator light, and the LED indicator light is connected with the MCU microprocessor and used for displaying the communication state.
In this embodiment, data acquisition module mainly installs in the switch board, including LED pilot lamp, MCU microprocessor, lora communication module, sensor in the cabinet, sensor outside the cabinet, lithium cell power module. The sensor outside the cabinet is installed outside the control cabinet, and the lithium battery voltage is converted into the voltage which can be used by the MCU through the lithium battery power supply module. And displaying the communication state through an LED indicating lamp. Humidity data are collected through a sensor, the humidity data are converted into digital signals, the digital signals are sent to a background through the Lora communication technology, and a device frame is shown in figure 1. The dehumidifier may be a heating device for dehumidifying the control cabinet.
2. Processing of risk assessment model
The processing procedure of the risk assessment model comprises the following steps:
acquiring a humidity value in the cabinet and a humidity value outside the cabinet according to a preset measuring and calculating period;
and if the humidity value in the cabinet is not lower than a preset dehumidifier starting value, controlling the dehumidifier to start, calculating the humidity change rate in the cabinet and the humidity change rate outside the cabinet according to the humidity value in the cabinet and the humidity value outside the cabinet, judging the working state of the dehumidifier in the control cabinet, and judging whether the overrun risk exists according to whether the humidity value in the cabinet reaches a preset early warning set value or not.
The processing of the risk assessment model further comprises:
and if the humidity value in the cabinet is lower than the starting value of the dehumidifier, controlling the dehumidifier to be closed.
In this embodiment, the processing procedure of the risk assessment model specifically includes:
setting a time interval delta T (such as 1 minute) of a monitoring system as a measuring and calculating period, and acquiring a humidity value of a monitored object in real time
Inner and outerHumidity value of external environment
Exterior, if the humidity value is
When the starting value% RH1 of the dehumidifier is not reached, the system periodically and circularly monitors the real-time humidity inside and outside the control cabinet, and when the internal humidity of the control cabinet object is monitored to be more than or equal to the starting value% RH1 set by the heating device, the monitoring system respectively calculates the humidity change rate of the monitoring control cabinet object according to the formula (1)
Rate of change of internal and external environments
In addition, according to the change rate of humidity and humidity of the obtained monitoring object
Internal value, and rate of change of the internal value with respect to external ambient humidity
And the external relation is that the working state of the heating dehumidification equipment in the control cabinet is judged, and meanwhile, a diagnosis result is given by combining whether the humidity of the monitored object exceeds an early warning set value% RH2, and a risk model is shown in figure 2.
The calculation expression of the humidity change rate is:
in the formula (I), the compound is shown in the specification,
in order to the rate of change of the humidity,
is the value of the humidity at the time T,
the humidity value is the humidity value at the time T-delta T, delta T is a time interval, and the time interval delta T is a measuring and calculating period.
3. Risk assessment model determination process
The judgment process of the risk assessment model specifically comprises the following steps:
s1: if the humidity value in the cabinet is not lower than the preset dehumidifier starting value, controlling the dehumidifier to start, and executing the step S2 and the step S3;
s2: if the humidity value in the cabinet is larger than a preset humidity exceeding threshold value, a humidity exceeding alarm signal is sent out;
s3: the change rate of the humidity in the cabinet is calculated,
if the change rate of the humidity in the cabinet is not lower than 0 and the change rate of the humidity outside the cabinet is lower than the change rate of the humidity in the cabinet, the dehumidifier is in a non-working state and sends a fault alarm signal of the dehumidifier;
if the change rate of the humidity in the cabinet is not lower than 0 and the change rate of the humidity outside the cabinet is higher than the change rate of the humidity in the cabinet, the dehumidifier is in a working state, and an alarm signal indicating that the overrun risk exists is sent out;
if the change rate of the humidity in the cabinet is less than 0, the change rate of the humidity outside the cabinet is less than 0, and the change rate of the humidity outside the cabinet is higher than the change rate of the humidity in the cabinet, not sending an alarm signal;
and if the change rate of the humidity in the cabinet is less than 0, the change rate of the humidity outside the cabinet is less than 0, and the change rate of the humidity outside the cabinet is lower than the change rate of the humidity in the cabinet, sending a fault early warning signal of the dehumidifier.
In this embodiment, as shown in fig. 3, the judgment process of the risk assessment model specifically includes:
1) And if the actually measured humidity of the monitoring control cabinet object is not less than the% RH2, the system sends a humidity standard exceeding alarm signal.
2) If the actually measured humidity of the monitoring control cabinet object is less than% RH2, the following scenario system diagnosis rules are adopted:
(1) if the humidity change rate of the monitoring control cabinet object is more than or equal to zero
And is
The dehumidifier is in a non-working state, cannot be started, cannot inhibit the increase of the internal humidity of the monitoring control cabinet object, sends a fault alarm signal of the dehumidifier and has the risk of exceeding the standard of the humidity;
(2) if the change rate of the monitoring control cabinet object is more than or equal to zero
And is provided with
The control cabinet dehumidifier is indicated to work but cannot meet the requirements, the increase of the internal humidity of the monitored object cannot be effectively inhibited, and no matter whether the control cabinet humidity exceeds the standard or not, the system sends out an early warning signal to warn that the risk of exceeding the limit exists;
(3) if the humidity change rate of the monitoring control cabinet object is less than zero
In a state of
The falling speed of the humidity inside the control cabinet is larger than the falling speed of the humidity outside the control cabinet, the working state of the dehumidifier is normal, and the system does not send out an alarm signal;
(4) if the humidity change rate of the monitoring control cabinet object is less than zero
In a state of
The humidity falling speed in the control cabinet is smaller than the humidity falling speed outside the control cabinet, the dehumidifier fails to work normally, and the system sends out a dehumidifier fault early warning signal.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the above teachings. Therefore, the technical solutions that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection determined by the claims.
Claims (10)
1. A transformer substation control cabinet humidity monitoring and risk early warning system based on digital twins is characterized by comprising a data acquisition module and a risk assessment module, wherein the data acquisition module comprises an in-cabinet humidity acquisition module and an out-cabinet humidity acquisition module, the in-cabinet humidity acquisition module is used for acquiring the in-cabinet humidity value of a transformer substation control cabinet, and the out-cabinet humidity acquisition module is used for acquiring the out-cabinet humidity value of the transformer substation control cabinet;
the risk assessment module includes:
the communication module is used for communicating with the data acquisition module to acquire acquired data information;
the parameter setting module is used for acquiring and setting the operation parameters of the whole system;
the risk evaluation module is used for substituting the humidity value in the cabinet and the humidity value outside the cabinet into a preset risk evaluation model to simulate and calculate the humidity state, the dehumidifier state and the dehumidifier performance of the substation control cabinet;
and the early warning feedback module is used for sending early warning information according to the calculation result of the risk assessment module.
2. The system for monitoring humidity and warning risks of transformer substation control cabinets based on digital twinning as claimed in claim 1, wherein the processing procedure of the risk assessment model comprises:
acquiring a humidity value in the cabinet and a humidity value outside the cabinet according to a preset measuring and calculating period;
and if the humidity value in the cabinet is not lower than a preset dehumidifier starting value, controlling the dehumidifier to start, calculating the humidity change rate in the cabinet and the humidity change rate outside the cabinet according to the humidity value in the cabinet and the humidity value outside the cabinet, judging the working state of the dehumidifier in the control cabinet, and judging whether the overrun risk exists according to whether the humidity value in the cabinet reaches a preset early warning set value or not.
3. The transformer substation control cabinet humidity monitoring and risk early warning system based on the digital twin as claimed in claim 2, wherein the calculation expression of the humidity change rate is as follows:
in the formula (I), the compound is shown in the specification,
in order to the rate of change of the humidity,
is the value of the humidity at the time T,
the humidity value is the humidity value at the time T-delta T, delta T is a time interval, and the time interval delta T is a measuring and calculating period.
4. The transformer substation control cabinet humidity monitoring and risk early warning system based on the digital twin as claimed in claim 2, wherein the judgment process of the risk assessment model specifically comprises:
s1: if the humidity value in the cabinet is not lower than the preset dehumidifier starting value, controlling the dehumidifier to start, and executing the step S2 and the step S3;
s2: if the humidity value in the cabinet is larger than a preset humidity standard exceeding threshold value, sending a humidity standard exceeding alarm signal;
s3: the change rate of the humidity in the cabinet is calculated,
if the humidity change rate in the cabinet is not lower than 0 and the humidity change rate outside the cabinet is lower than the humidity change rate in the cabinet, the dehumidifier is in a non-working state and sends a fault alarm signal of the dehumidifying device;
if the change rate of the humidity in the cabinet is not lower than 0 and the change rate of the humidity outside the cabinet is higher than the change rate of the humidity in the cabinet, the dehumidifier is in a working state and sends out an alarm signal indicating that the overrun risk exists;
if the change rate of the humidity in the cabinet is less than 0, the change rate of the humidity outside the cabinet is less than 0, and the change rate of the humidity outside the cabinet is higher than the change rate of the humidity in the cabinet, no alarm signal is sent out;
and if the change rate of the humidity in the cabinet is less than 0, the change rate of the humidity outside the cabinet is less than 0, and the change rate of the humidity outside the cabinet is lower than the change rate of the humidity in the cabinet, sending a fault early warning signal of the dehumidifier.
5. The system of claim 2, wherein the processing of the risk assessment model further comprises:
and if the humidity value in the cabinet is lower than the starting value of the dehumidifier, controlling the dehumidifier to be closed.
6. The system as claimed in claim 1, wherein the data acquisition module further comprises an MCU microprocessor, a Lora communication module and a power supply module, the inside humidity acquisition module and the outside humidity acquisition module are both humidity sensors, the MCU microprocessor is respectively connected to the inside humidity acquisition module, the outside humidity acquisition module, the Lora communication module and the power supply module, the Lora communication module is connected to the communication module, and the MCU microprocessor acquires humidity data through the inside humidity acquisition module and the outside humidity acquisition module, converts the humidity data into digital signals, and sends the digital signals to the risk assessment module through the Lora communication module.
7. The transformer substation control cabinet humidity monitoring and risk early warning system based on the digital twin as claimed in claim 6, wherein the power supply module is a lithium battery power supply module for converting a lithium battery voltage into an MCU operating voltage.
8. The system of claim 6, wherein the data acquisition module further comprises an LED indicator light, and the LED indicator light is connected with the MCU microprocessor and used for displaying a communication state.
9. The digital twin-based substation control cabinet humidity monitoring and risk early warning system of claim 1, wherein the dehumidifier is a heating device.
10. The transformer substation control cabinet humidity monitoring and risk early warning system based on the digital twin as claimed in claim 1, wherein the in-cabinet humidity acquisition module is installed in a transformer substation control cabinet, and the out-cabinet humidity acquisition module is installed outside the transformer substation control cabinet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211379633.9A CN115601015A (en) | 2022-11-04 | 2022-11-04 | Transformer substation control cabinet humidity monitoring and risk early warning system based on digital twinborn |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118040895A (en) * | 2024-02-18 | 2024-05-14 | 北京大瑀工业科技有限公司 | Monitoring method and system of intelligent power distribution cabinet |
| CN118397788A (en) * | 2024-04-18 | 2024-07-26 | 苏州瑞档信息科技股份有限公司 | File storage environment safety intelligent monitoring system suitable for personnel files |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118040895A (en) * | 2024-02-18 | 2024-05-14 | 北京大瑀工业科技有限公司 | Monitoring method and system of intelligent power distribution cabinet |
| CN118397788A (en) * | 2024-04-18 | 2024-07-26 | 苏州瑞档信息科技股份有限公司 | File storage environment safety intelligent monitoring system suitable for personnel files |
| CN118397788B (en) * | 2024-04-18 | 2024-10-18 | 苏州瑞档信息科技股份有限公司 | File storage environment safety intelligent monitoring system suitable for personnel files |
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