CN116699464A - Wireless site leakage monitoring system - Google Patents
Wireless site leakage monitoring system Download PDFInfo
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- CN116699464A CN116699464A CN202310955367.8A CN202310955367A CN116699464A CN 116699464 A CN116699464 A CN 116699464A CN 202310955367 A CN202310955367 A CN 202310955367A CN 116699464 A CN116699464 A CN 116699464A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 24
- 238000004891 communication Methods 0.000 claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 14
- 239000000725 suspension Substances 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 abstract description 26
- 238000012423 maintenance Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 9
- 230000005611 electricity Effects 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 241000282326 Felis catus Species 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2503—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques for measuring voltage only, e.g. digital volt meters (DVM's)
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/56—Testing of electric apparatus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
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- Signal Processing (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The application discloses a wireless station electric leakage monitoring system, in particular to the technical field of wireless station maintenance detection, which comprises the following steps: a plurality of measurement stations and microprocessors, 4G module, server, display module, survey is including setting up on the wireless website: a steel twisted suspension wire of a power cable terminal rod, an alternating current distribution box shell, a tower body ladder, a cable armor layer and an optical cable reinforcing core; the microprocessor comprises: and the steel twisted suspension wire of the power cable terminal rod is electrically connected with the interface A through a lead. The method has the advantages that whether the electricity leakage occurs at the measurement position is determined according to whether the detected voltage difference exceeds the preset value or not through detecting the voltage difference between each measurement of the communication equipment and the ground in real time, the uploaded electricity leakage voltage is displayed to the master station server in real time for reference, the accurate and timely detection of the possible electricity leakage area of the communication line is realized, the person after electricity leakage is effectively prevented from going to the station again for detection, and the overhaul safety and reliability of the communication equipment are improved.
Description
Technical Field
The application relates to the technical field of wireless station maintenance and detection, in particular to a wireless station electric leakage monitoring system.
Background
With the increase of the demand of the communication equipment, the communication equipment is leaked in the process of installation and maintenance, and the life safety of installation personnel and maintenance personnel is endangered by electric shock accidents. In many cases, the communication device is installed in an outdoor environment, and in this environment, after long-term use, the power supply device of the communication device is partially broken, and thus leakage is likely to occur.
The existing communication equipment detection method is mainly characterized in that voltage detection is carried out on peripheral areas and possible electric leakage areas of communication equipment one by one through manual handheld detection equipment.
However, the existing electric leakage detection equipment needs to be manually explored point by point to determine the position of an electric leakage barrier point, the equipment which cannot be subjected to electric leakage monitoring and needs to be detected in the existing method is subjected to electric leakage under the condition that the existing method is not electrified, the electric leakage is detected one by the human, the danger of electric shock of detection personnel exists, and people can be dispatched to stand for detection only after a large communication fault occurs, so that the real-time performance is poor, and in addition, the detection operation danger is large, and the personnel cost is high. Meanwhile, the cable is complex in arrangement structure, and the method is difficult to quickly and accurately acquire the obstacle point position, so that the detection time is too long, and the safety of personnel is seriously threatened.
Disclosure of Invention
The application provides a wireless station electric leakage monitoring system aiming at the technical problems, which can detect the electric leakage condition of communication equipment in real time, upload electric leakage alarm information in time, facilitate in-time station check and improve the use safety of the communication equipment.
The application provides a wireless station electric leakage monitoring system, which comprises: a plurality of measuring points, a microprocessor, a 4G module, a server and a display module,
the measuring point comprises a measuring point arranged on a wireless station: a steel twisted suspension wire of a power cable terminal rod, an alternating current distribution box shell, a tower body ladder, a cable armor layer and an optical cable reinforcing core;
the microprocessor comprises: the steel twisted suspension wire of the power cable terminal rod is electrically connected with the interface A through a lead;
the alternating current distribution box shell, the tower body ladder, the cable armor layer and the optical cable reinforcing core are respectively connected with the interface B through wires;
the microprocessor is electrically connected with the 4G module and the display module respectively; the 4G module and the server are electrically connected: the microprocessor sends the equipment information and the detected voltage value to an NB-IOT module of the 4G module through a serial port, and the 4G module uploads the detected voltage value to a server through TCP/UDP communication;
the microprocessor is used for respectively acquiring the voltage values of the measuring points at the interface A and the interface B and calculating the voltage difference of the measuring points according to the following formula: the voltage difference of each measuring point is uploaded to a server or a display module;
the microprocessor is also configured to: comparing the voltage difference of the real-time measuring points with a preset value, when the voltage difference of any measuring point exceeds 36V but does not exceed 80V, carrying out suspected warning, timing the suspected warning state time t1, and carrying out electric leakage warning when the time t1 is more than or equal to 4h and is the suspected warning;
when the voltage difference of any measuring point exceeds 80V and the timing time t2 is more than or equal to 10 minutes, carrying out electric leakage warning; after the leakage alarm is carried out, the microprocessor alarms to the server through the 4G module;
the specific positions of the measuring points are as follows: one end of the power cable is electrically connected with the mains supply, and the other end of the power cable is electrically connected with the wireless station power supply module; one end of the power cable connected with the wireless station is hung outside the station through a steel strand; the alternating-current distribution box is arranged in the shell, and the alternating-current distribution box shell is arranged outside the wireless station machine room;
the wireless station machine room is arranged on the top surface of the tower body; the side wall of the tower body is provided with a ladder stand; an armor layer is arranged on the outer wall of the power cable; the measuring point is a cable armor layer of the power cable close to the wireless station; the optical cable reinforcing core is arranged in the power cable, and the measuring point is the optical cable reinforcing core of the power cable close to the wireless station.
Preferably, it comprises: surge protection modules arranged in pairs; the surge protection module is arranged on a line connected with each measuring point by the interface A; the surge protection module is arranged on a line connected with each measuring point through the B interface.
Preferably, it comprises: a DC-DC module and a Flyback circuit; the DC-DC module is electrically connected with a wireless station power supply; the Flyback circuit is in power supply connection with the DC-DC module and the microprocessor.
Preferably, the wireless station power supply is an FSU module.
Preferably, it comprises: and the server is electrically connected with the alarm module.
Preferably, the 4G module is a 4G Internet of things card.
The application has the beneficial effects that:
1) According to the wireless station leakage monitoring system provided by the application, through detecting the voltage difference between each measuring point of the communication equipment and the ground in real time, whether the position of the measuring point is leaked or not is determined according to whether the detected voltage difference exceeds the preset value, and the uploaded voltage difference is displayed in real time to the master station server for reference, so that the possible leakage area of the communication line is accurately and timely checked, the detection of the personnel after the leakage is effectively prevented from being on the station again, and the safety reliability and timeliness of the overhaul of the communication equipment are improved.
2) According to the wireless station electric leakage monitoring system provided by the application, the steel twisted hanging wire, the alternating current distribution box shell, the tower body ladder, the cable armor layer and the optical cable reinforcing core are selected as the measuring points on the wireless station, so that the reliability and the accuracy of a detection result are effectively improved, the occurrence probability of station electric leakage accidents is effectively avoided, and the situation that station electric leakage causes communication to be terminated before station detection is performed is effectively avoided after the system is used for detection.
Drawings
FIG. 1 is a schematic diagram of a wireless station leakage monitoring system module connection;
fig. 2 is a schematic circuit connection diagram of a wireless station leakage monitoring system provided by the application;
FIG. 3 is a schematic diagram of a connection structure of a power supply module according to the present application;
the illustration is:
1. a surge protection module; 2. a microprocessor; 21. a display module; 22. a 4G module; 23. a server; 24. an alarm module; 31. a Flyback circuit; 32. a DC-DC module; 11. a first varistor; 111. a first voltage dividing resistor; 112. a first gas discharge tube; 114. a second voltage dividing resistor; 113. a second varistor; 115. a second gas discharge tube; 51. a steel twisted suspension wire of a power cable terminal rod; 52. an ac distribution box housing; 53. a tower body cat ladder; 54. a cable armor layer; 55. an optical cable reinforcing core; 56. station power supply.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application 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 application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, based on the embodiments of the application, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the application.
The technical means which are not described in detail and are not used for solving the technical problems of the application are all arranged according to common general knowledge in the field, and various common general knowledge arrangement modes can be realized.
Referring to fig. 1 to 3, the wireless station leakage monitoring system provided by the application includes: a plurality of measuring points and microprocessors 2, 4G modules 22, a server 23 and a display module 21,
the measuring point comprises a measuring point arranged on a wireless station: a steel twisted suspension wire 51 of a power cable terminal rod, an alternating current distribution box shell 52, a tower body ladder 53, a cable armor layer 54 and an optical cable reinforcing core 55;
the microprocessor 2 includes: the steel strand wire 51 of the power cable terminal rod is electrically connected with the interface A through a lead;
the alternating-current distribution box shell 52, the tower body ladder 53, the cable armor layer 54 and the optical cable reinforcing core 55 are respectively connected with the B interface through wires;
the microprocessor 2 is respectively and electrically connected with the 4G module 22 and the display module 21; the 4G module 22 and the server 23 are electrically connected;
the microprocessor 2 is used for respectively acquiring the voltage values of the measuring points at the interface A and the interface B and calculating the voltage difference of the measuring points according to the following formula: the voltage difference of each measuring point is uploaded to a server 23 or displayed;
the microprocessor 2 is also configured to: comparing the voltage difference of the real-time measuring points with a preset value, when the voltage difference of any measuring point exceeds 36V but does not exceed 80V, carrying out suspected warning, timing the suspected warning state time t1, and carrying out electric leakage warning when the time t1 is more than or equal to 4h and is the suspected warning;
when the voltage difference of any measuring point exceeds 80V and the timing time t2 is more than or equal to 10 minutes, carrying out electric leakage warning; after the leakage alarm is carried out, the microprocessor 2 alarms to the server 23 through the 4G module;
the specific positions of the measuring points are as follows: one end of the power cable is electrically connected with the mains supply, and the other end of the power cable is electrically connected with the wireless station power supply module; one end of the power cable connected with the wireless station is hung outside the station through a steel strand; the alternating-current distribution box is arranged in the shell, and the alternating-current distribution box shell 52 is arranged outside the wireless station machine room;
the wireless station machine room is arranged on the top surface of the tower body; the side wall of the tower body is provided with a ladder stand; an armor layer is arranged on the outer wall of the power cable; the measuring point is a cable armor layer 54 of the power cable close to the wireless station; the optical cable strength member 55 is disposed within the power cable, and the station is the optical cable strength member 55 of the power cable near the wireless station.
The off-line operation and maintenance personnel can be informed of the on-line operation and maintenance personnel to go to the station in time to check, and the problem that the electric leakage problem cannot be solved in time is avoided.
According to the application, through analyzing the communication machine room classification facilities, steel twisted suspension wires, an alternating current distribution box shell 52, a tower body ladder 53, a cable armor layer 54 and an optical cable reinforcing core 55 are used as measuring points, and the electric leakage condition of communication equipment can be accurately and real-timely detected by selecting the measuring points.
The system is used for detecting the leakage condition of 1000 base stations in a certain area, when excess voltage appears at the above parts, the system is turned to a first line operation and maintenance personnel to perform the check of the upper station detection for counting statistics after reporting the information in time, and the quantity of the leakage base stations is counted and monitored by the actual measurement.
The accuracy rate=the number of the monitored leakage base stations/the number of the actually measured monitored leakage base stations is 100% as follows. After the device is used and operated for 1 month, the accuracy rate of the local leakage condition can reach 100%, and the accurate prediction of the leakage condition is realized.
The application classifies the detection positions, detects the positions which are easy to generate electric shock hidden trouble by accessing to the point A, and detects other positions which are difficult to generate electric leakage in a parallel connection mode. Specifically, the a interface only detects the steel strand 51 of the power cable termination pole, and the b interface can be accessed to the power cable armor layer 54, the ac distribution box housing 52, the cable reinforcement core 55, the tower ladder 53.
By arranging the measuring points in the mode, the occurrence ratio of false alarm conditions can be effectively reduced, the detection frequency of the steel twisted suspension wire 51 of the power cable terminal rod can be improved, and the accuracy and timeliness of the detection result can be effectively improved.
The leakage detector is connected with the detection point through a wire.
In a specific embodiment, the AC voltage (AC 0-380 v) to be detected is divided by a voltage dividing resistor and sent to an ADC port (voltage range (0-2.5 v) of the microprocessor 2, the microprocessor 2 (MCU) calculates a voltage difference between the detection point and the fixed value ground according to the value (0-4096) of the ADC, and then displays the voltage value of the detection point relative to the ground through a nixie tube, meanwhile, the microprocessor 2 sends the device information and the detected voltage value to the 4G module 22 (NB-IOT module) through a serial port, and the 4G module 22 uploads the detected voltage value to the master station (server 23) through TCP/UDP communication.
The method for processing the voltage difference can improve the alarm accuracy and reduce the probability of missing report, and alarm parameters are set according to the parameters, so that the electric shock danger caused by personnel on-site check can be effectively avoided, and the safety of personnel on-site overhaul is effectively improved.
In a specific embodiment, after the electric leakage detector is powered on and initialized, the electric leakage detector firstly sends equipment working condition data and detects whether leakage voltage exists in real time. When the voltage difference of the measuring point exceeds 36V but does not exceed 80V, the suspected alarm state is entered, the leakage alarm is carried out after the time is counted for 4 hours and the leakage alarm is not carried out.
And when the leakage voltage exceeds 80V, counting for 10 minutes and warning the leakage.
When the leakage alarm is triggered, the microprocessor 2 establishes communication with the server 23 through the 4G module, and sends the leakage voltage to the master station (server 23) and alarms.
In one embodiment, the method comprises the following steps: surge protection modules 1 arranged in pairs; the surge protection module 1 is arranged on a line of the interface A connected with each measuring point; the surge protection module 1 is arranged on a line of the B interface connected with each measuring point. Through setting up surge protection module 1 detectable response thunderbolt, filter the heavy voltage heavy current, reach the effect of protection equipment, ensure equipment security.
In one embodiment, the method comprises the following steps: a DC-DC block 32 and a Flyback circuit 31; the DC-DC module 32 is electrically connected with a wireless station power supply; the Flyback circuit 31 is in power connection with the DC-DC module 32 and the microprocessor 2. The voltage detection module can be continuously powered by the device.
In one embodiment, the wireless station power supply is an FSU module.
The power cable leakage detector consists of a power adapter and a leakage detector, and a machine room-48V power supply outputs a 5V power supply through the adapter to supply power for the leakage detector; the leakage detector integrates a surge protection function, a leakage voltage detection function, a nixie tube display function, a 4G Internet of things communication function and an AI voltage alarm function.
In one embodiment, the-48V power generated by the station power supply 56 is reduced by the DC-DC module 32 to obtain a-5V power, and then a Flyback circuit 31 isolates the front and rear stage circuits (avoids interference between different power supplies), and outputs +5v power as the power supply of the leakage detector.
In one embodiment, the method comprises the following steps: alarm module 24, server 23 alarm can be realized through the alarm module 24 that is connected with the server 23 electricity.
The remote communication technology is to install a 4G Internet of things card, send the detection data and the state of the equipment to the server 23 at regular time, and send alarm voltage immediately when alarming.
The monitoring of the server 23 is to comprehensively manage the equipment state, and carry out large-screen voice message notification, short message reminding notification and voice dialing notification on the alarm data, thereby realizing instantaneity. The server 23 used includes: the operation and maintenance monitoring system and the electric leakage monitoring management system can effectively display the voltage difference value of each measuring point in real time through the 2 systems, and feed back the obtained voltage difference value of each measuring point to a manager, so that the manager can conveniently inform an on-line operation and maintenance person to check on-line according to alarm information.
In a specific embodiment, the measuring points of the device are respectively an A point connected with one end of a power cable hanging wire and a B interface connected with the outer wall of the wireless station, and accurate monitoring of the electricity leakage condition can be completed only by setting 2 points.
In one embodiment, the microprocessor 2 performs data transmission with the leakage monitoring management system through the 4G module 22; and the microprocessor 2 is also electrically connected with the FSU, and the FSU is used for transmitting data with the operation and maintenance monitoring system after processing.
In one embodiment, the microprocessor 2 is electrically connected to the display module 21; the microprocessor 2 is electrically connected with the 4G module 22; simultaneously, the microprocessor 2 is electrically connected with the interface A through the first module; the first module includes: 2 first voltage dividing resistors 111 arranged in series; the 2 serially connected first voltage dividing resistors 111 are connected in parallel with the first piezoresistor 11 and the first gas discharge tube 112; the first piezoresistor 11 and the first gas discharge tube 112 are connected in series;
simultaneously, the microprocessor 2 is electrically connected with the interface A through a second module; the second module includes: 2 second voltage dividing resistors 114 arranged in series; the 2 serially connected second voltage dividing resistors 114 are connected in parallel with the second piezoresistor 113 and the second gas discharge tube 115; the second varistor 113 and the second gas discharge tube 115 are connected in series.
Although the present application has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present application.
Claims (6)
1. A wireless station leakage monitoring system, comprising: a plurality of measuring points, a microprocessor, a 4G module, a server and a display module,
the measuring point comprises a measuring point arranged on a wireless station: a steel twisted suspension wire of a power cable terminal rod, an alternating current distribution box shell, a tower body ladder, a cable armor layer and an optical cable reinforcing core;
the microprocessor comprises: the steel twisted suspension wire of the power cable terminal rod is electrically connected with the interface A through a lead;
the alternating current distribution box shell, the tower body ladder, the cable armor layer and the optical cable reinforcing core are respectively connected with the interface B through wires;
the microprocessor is electrically connected with the 4G module and the display module respectively;
the 4G module and the server are electrically connected: the microprocessor sends the equipment information and the detected voltage value to an NB-IOT module of the 4G module through a serial port, and the 4G module uploads the detected voltage value to a server through TCP/UDP communication;
the microprocessor is used for respectively acquiring the voltage values of the measuring points at the interface A and the interface B and calculating the voltage difference of the measuring points according to the following formula: the voltage difference of each measuring point is uploaded to a server or a display module;
the microprocessor is also configured to: comparing the voltage difference of the real-time measuring points with a preset value, when the voltage difference of any measuring point exceeds 36V but does not exceed 80V, carrying out suspected warning, timing the suspected warning state time t1, and carrying out electric leakage warning when the time t1 is more than or equal to 4h and is the suspected warning;
when the voltage difference of any measuring point exceeds 80V and the timing time t2 is more than or equal to 10 minutes, carrying out electric leakage warning; after the leakage alarm is carried out, the microprocessor alarms to the server through the 4G module;
the specific positions of the measuring points are as follows: one end of the power cable is electrically connected with the mains supply, and the other end of the power cable is electrically connected with the wireless station power supply module; one end of the power cable connected with the wireless station is hung outside the station through a steel strand; the alternating-current distribution box is arranged in the shell, and the alternating-current distribution box shell is arranged outside the wireless station machine room;
the wireless station machine room is arranged on the top surface of the tower body; the side wall of the tower body is provided with a ladder stand; an armor layer is arranged on the outer wall of the power cable; the measuring point is a cable armor layer of the power cable close to the wireless station; the optical cable reinforcing core is arranged in the power cable, and the measuring point is the optical cable reinforcing core of the power cable close to the wireless station.
2. The wireless station leakage monitoring system according to claim 1, comprising: surge protection modules arranged in pairs; the surge protection module is arranged on a line connected with each measuring point by the interface A; the surge protection module is arranged on a line connected with each measuring point through the B interface.
3. The wireless station leakage monitoring system according to claim 1, comprising: a DC-DC module and a Flyback circuit; the DC-DC module is electrically connected with a wireless station power supply; the Flyback circuit is in power supply connection with the DC-DC module and the microprocessor.
4. The wireless station leakage monitoring system of claim 3, wherein the wireless station power supply is an FSU module.
5. The wireless station leakage monitoring system according to claim 1, comprising: and the server is electrically connected with the alarm module.
6. The wireless station leakage monitoring system of claim 1, wherein the 4G module is a 4G internet of things card.
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| CN202310955367.8A CN116699464B (en) | 2023-08-01 | 2023-08-01 | Wireless site leakage monitoring system |
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| CN202310955367.8A CN116699464B (en) | 2023-08-01 | 2023-08-01 | Wireless site leakage monitoring system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117269669A (en) * | 2023-09-21 | 2023-12-22 | 广东电网有限责任公司广州供电局 | Street code safety monitoring method and device and computer equipment |
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| CN116699464B (en) | 2023-09-26 |
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