CN114094523A - Cable intelligence grounding box based on thing networking - Google Patents
Cable intelligence grounding box based on thing networking Download PDFInfo
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- CN114094523A CN114094523A CN202111332191.8A CN202111332191A CN114094523A CN 114094523 A CN114094523 A CN 114094523A CN 202111332191 A CN202111332191 A CN 202111332191A CN 114094523 A CN114094523 A CN 114094523A
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- coaxial cable
- grounding
- box body
- grounding box
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- 230000006855 networking Effects 0.000 title claims abstract description 6
- 230000001012 protector Effects 0.000 claims abstract description 15
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 10
- 238000007689 inspection Methods 0.000 claims description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 21
- 229910052802 copper Inorganic materials 0.000 claims description 21
- 239000010949 copper Substances 0.000 claims description 21
- 238000009413 insulation Methods 0.000 claims description 21
- 238000004891 communication Methods 0.000 claims description 9
- 230000006698 induction Effects 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 4
- 239000012780 transparent material Substances 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims 1
- 238000013480 data collection Methods 0.000 abstract description 3
- 230000005283 ground state Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 5
- 230000005389 magnetism Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000012945 sealing adhesive Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/08—Distribution boxes; Connection or junction boxes
- H02G3/088—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings or inlets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/08—Distribution boxes; Connection or junction boxes
- H02G3/16—Distribution boxes; Connection or junction boxes structurally associated with support for line-connecting terminals within the box
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model provides a cable intelligence ground connection case based on thing networking, through set up current-voltage transformer in ground connection incasement body inside, the voltage limiting protector, liquid crystal display, data collection station, the LED light, the board is gathered through the current information and the voltage information of real-time collection mutual-inductor and the inside humiture information of box to this system during operation, and judge through calculating in advance, judge whether the grounding property exists unusually and current ground state, and carry out relevant information display through local demonstration LCD screen, carry out real-time data teletransmission with this information through local port or wireless port simultaneously, data will carry out comprehensive analysis after the platform is gathered, directional exhibition trend and corresponding trouble or warning, be used for the unable very first time discovery trouble of staff, solve the trouble and take precautions against in stopping all potential safety hazards.
Description
Technical Field
The application relates to the technical field of high-voltage power cables, in particular to an intelligent cable grounding box based on the Internet of things.
Background
Along with the rapid development of the economy of China and the continuous expansion of the urban scale, the urban power consumption is increased rapidly. The safe and reliable operation of the high-voltage cable plays an important role in stabilizing the urban power grid. The high-voltage cable adopts the mode of metal sheath ground connection to isolate the influence of a strong electric field in the cable on the outside and can provide a fault current conduction channel when the cable has a fault. The grounding current can reflect the running state of the cable to a certain extent and becomes an important index for measuring the reliability of the high-voltage cable.
The cable grounding box is an indispensable important device of a high-voltage cable grounding system. Most of the grounding boxes are installed in underground cable wells, however, the cable wells frequently have water flow backflow in rainy seasons, the grounding boxes used at the present stage are all common grounding boxes, the protection level cannot reach the standard, and no intelligent monitoring device is arranged inside the grounding boxes. The grounding box soaked in water is easy to be affected with damp and enter water, so that the insulation of the protector is low or the contact resistance is increased to cause the cable circulation to exceed the standard or the induction voltage to exceed the standard, and a person who is easy to have electric shock danger and serious can burn the cable. The staff can not discover the trouble very first time, has serious potential safety hazard, still can endanger patrolling personnel's personal safety.
Disclosure of Invention
The application provides a cable intelligence grounding box based on thing networking to solve the problem that the staff can't discover the trouble very first time.
The utility model provides a cable intelligence grounding box based on thing networking, includes: the grounding box comprises a grounding box body, wherein a current and voltage transformer, a voltage limiting protector, a liquid crystal display screen and a data acquisition unit are arranged in the grounding box body;
the current-voltage transformer is arranged on a transformer insulation fixing plate, two ends of the transformer insulation fixing plate are fixed on the inner wall of the grounding box body, the voltage limiting protector is fixed on a grounding copper bar, two ends of the grounding copper bar are fixed on the inner wall of the grounding box body, the grounding copper bar and the transformer insulation fixing plate are parallel to each other, and the liquid crystal display screen is fixed on the inner wall of the grounding box body through a fixing support and is close to the inner wall of one side of the grounding box body;
the grounding box body is internally provided with a plurality of coaxial cable outer-layer clamps and a plurality of coaxial cable inner-core clamps, the plurality of coaxial cable outer-layer clamps and the plurality of coaxial cable inner-core clamps are all arranged on the terminal insulation fixing plate, the coaxial cable outer-layer clamps and the coaxial cable inner-core clamps are connected through copper bars, and the voltage limiting protector is connected with the coaxial cable inner-core clamps through copper bars;
the data collector is arranged on the back face of the terminal insulation fixing plate, and the bottom of the grounding box body is further provided with a plurality of cable sheath wire inlets and a power supply communication port.
Preferably, the method further comprises the following steps: the system comprises an LED illuminating lamp and a magnetic induction type inspection switch;
the LED light sets up inside the ground connection case body, the switch welding is patrolled and examined to the magnetism induction formula on the outer wall of ground connection case body.
Preferably, the grounding box body comprises: the inspection box comprises a box body, a box cover and an inspection window;
the inspection window is embedded in the box cover in a sealing mode through a glass pressing strip.
Preferably, a case cover handle is arranged on the case cover, a case hanging lug is arranged outside the case body, the case body is rectangular, and the case hanging lug is arranged at the four corners of the rectangular case body.
Preferably, the inspection window is made of transparent material.
Preferably, the coaxial cable outer clamp includes: the coaxial cable outer layer fixture base and the coaxial cable outer layer fixture clamping tongue;
the coaxial cable outer layer fixture base and the coaxial cable outer layer fixture clamping tongue are both provided with U-shaped openings, and the coaxial cable outer layer fixture base is connected with the coaxial cable outer layer fixture clamping tongue through a fixing bolt;
one end of the fixing bolt penetrates through the clamping tongue of the outer-layer fixture of the coaxial cable, and the other end of the fixing bolt is screwed into the base of the outer-layer fixture of the coaxial cable.
According to the technical scheme, the intelligent cable grounding box based on the Internet of things is applied to a high-voltage cable network system. According to the invention, the cast aluminum or stainless steel case is used for integral design, the middle part of the cover plate of the case body is hollowed, and the glass fiber reinforced plastic is embedded for processing treatment, so that the waterproof performance of the whole machine is ensured, and the glass window is used as a polling window for polling personnel to check the internal connection state, the oxidation condition and the damp condition. The integral grounding copper bar of the grounding box is designed in a cross interconnection mode and can be used for cross interconnection grounding and direct grounding, so that the on-site practical application is facilitated. The current and voltage transformer is used as a collecting sensor, and the transformers are sequentially installed and fixed at the position of a wire inlet at the bottom of the box body, so that the whole installation is convenient and easy to use. And a local display liquid crystal screen is fixed on the right side of the top end of the box body and is used for displaying local grounding current of the box body and temperature and humidity information inside the box body. The middle part of the top end in the box body is provided with an LED illuminating lamp for facilitating inspection personnel to inspect. The upper portion of the right side of the box body is provided with a local patrol inspection button, patrol inspection personnel press the button to light an LED lamp inside the intelligent grounding box, so that patrol inspection personnel can conveniently patrol, a system automatically reports a patrol inspection state after patrol inspection is completed, and a report result is remotely transmitted through a communication interface. The current information and the voltage information of mutual-inductor and the inside humiture information of box are gathered through real-time to this system during operation collection board, and through calculation prejudgement, judge whether the grounding performance has unusually and current ground connection state, and carry out relevant information display through local display LCD screen, carry out real-time data remote transmission with this information through local port or wireless port simultaneously, data will carry out comprehensive analysis after the platform is assembled, directional development trend and corresponding trouble or warning, be used for the unable very first time discovery trouble of staff, solve the trouble and take precautions against in stopping all potential safety hazards.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is an external structural schematic diagram of an intelligent cable grounding box based on the internet of things;
FIG. 2 is a schematic diagram of an internal structure of an intelligent cable grounding box based on the Internet of things;
FIG. 3 is a schematic bottom structure diagram of an intelligent cable grounding box based on the Internet of things;
FIG. 4 is a schematic view of an outer clamp for a coaxial cable;
FIG. 5 is a schematic view of a current-voltage transformer mounting structure;
FIG. 6 is a schematic view of the installation position of the data collector;
fig. 7 is a schematic view of the installation position of the pressure limiting protector.
Description of reference numerals:
1-a grounding box body; 2-a current-voltage transformer; 3-a voltage limiting protector; 4-liquid crystal display screen; 5-a data collector; 6-transformer insulation fixing plate; 7-a grounding copper bar; 8-coaxial cable outer clamp; 9-coaxial cable inner core clamp; 10-terminal insulation fixing plate; 11-cable sheath wire inlet; 12-a power supply communication port; 13-LED lighting lamps; 14-magnetic induction type inspection switch; 101-a box body; 102-a box cover; 103-inspection window; 104-case lid handle; 105-case hangers; 801-coaxial cable outer layer fixture base; the 802-coaxial cable outer layer fixture is locked with the tongue.
Detailed Description
Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely as exemplifications of systems and methods consistent with certain aspects of the application, as recited in the claims.
In the technical solution provided by the present application, a cable intelligent grounding box based on the internet of things is provided, please refer to fig. 1, fig. 2, fig. 4, fig. 5 and fig. 6, a cable intelligent grounding box based on the internet of things includes: the grounding box comprises a grounding box body 1, wherein a current-voltage transformer 2, a voltage-limiting protector 3, a liquid crystal display screen 4 and a data collector 5 are arranged in the grounding box body 1; the current and voltage transformer 2 is arranged on a transformer insulation fixing plate 6, two ends of the transformer insulation fixing plate 6 are fixed on the inner wall of the grounding box body 1, the voltage limiting protector 3 is fixed on a grounding copper bar 7, two ends of the grounding copper bar 7 are fixed on the inner wall of the grounding box body 1, the grounding copper bar 7 and the transformer insulation fixing plate 6 are parallel to each other, the liquid crystal display 4 is fixed on the inner wall of the grounding box body 1 through a fixing bracket and is close to one side inner wall of the grounding box body 1, a plurality of coaxial cable outer layer clamps 8 and a plurality of coaxial cable inner core clamps 9 are also arranged inside the grounding box body 1, the plurality of coaxial cable outer layer clamps 8 and the plurality of coaxial cable inner core clamps 9 are all arranged on a terminal insulation fixing plate 10, and the coaxial cable outer layer clamps 8 and the coaxial cable inner core clamps 9 are connected through copper bars, the voltage limiting protector 3 is connected with the coaxial cable inner core clamp 9 through a copper bar, the data collector 5 is arranged on the back of the terminal insulation fixing plate 10, and the bottom of the grounding box body 1 is further provided with a plurality of cable sheath wire inlets 11 and a power supply communication port 12.
Further, still include: switch 14 is patrolled and examined to LED light 13 and magnetism induction type, LED light 13 sets up inside ground connection case body 1, switch 14 welding is patrolled and examined to magnetism induction type on the outer wall of ground connection case body 1. The grounding box body 1 comprises: the inspection device comprises a box body 101, a box cover 102 and an inspection window 103, wherein the box body 101 and the box cover 102 are hinged, and the inspection window 103 is embedded in the box cover 102 through glass press sealing. The box cover 102 is provided with a box cover handle 104, the box body 101 is externally provided with a box hanging lug 105, the box body 101 is rectangular, and the box hanging lug 105 is arranged at the four corners of the rectangle of the box body 101. The inspection window 103 is made of transparent material.
Further, the coaxial cable outer clamp 8 includes: the outer fixture base 801 of coaxial cable and the outer fixture clamping tongue 802 of coaxial cable are both provided with U-shaped openings, the outer fixture base 801 of coaxial cable is connected with the outer fixture clamping tongue 802 of coaxial cable through a fixing bolt, one end of the fixing bolt penetrates through the outer fixture clamping tongue 802 of coaxial cable, and the other end of the fixing bolt is screwed into the outer fixture base 801 of coaxial cable.
The LED illuminating lamp 13 is fixed in the middle of the upper part inside the grounding box body 1 and used for providing illumination for the inside of the box body, so that inspection personnel can see the inside conditions clearly. Liquid crystal display 4 fixes in the inside upper right side of ground connection case for information such as show current-voltage and humiture discharge number of times, the personnel of being convenient for patrol and examine look over locally. The box body is sealed by a sealing adhesive tape, so that the sealing performance of the box body is ensured. One end of the current-voltage transformer 2 is fixed on the transformer insulation fixing plate 6 to ensure the insulation performance, and meanwhile, the center round hole of the current-voltage transformer 2 is aligned to the center of the cable sheath wire inlet 11 to ensure that the wire inlet is not interfered. And the terminal insulating plate fixing plate 10 is used for fixing the outer clamp 8 of the coaxial cable and the inner clamp 9 of the coaxial cable, one end of the terminal insulating plate fixing plate is connected with the clamp, and the other end of the terminal insulating plate fixing plate is connected with the box body. One end of the coaxial cable outer layer fixture 8 is fixed on the terminal insulating board fixing plate 10, the other end is connected to the copper bar, and the central hole fixture is used for fixing the shielding layer of the incoming coaxial cable. One end of a coaxial cable inner core clamp 9 is fixed on the terminal insulating plate fixing plate 10, the other end of the coaxial cable inner core clamp is connected to the copper bar, and a central hole clamp of the coaxial cable inner core clamp is used for fixing an inner core of a coaxial cable of an incoming line. One end of the grounding copper bar 7 is connected with the coaxial cable inner core clamp 9, and the other end is connected with 3 voltage limiting protectors 3, so that the function of leading out current is achieved.
In the technical solution provided in the present application, please refer to fig. 3, a plurality of cable sheath inlets 11 are provided at the bottom of the box, and the center of the cable sheath inlets 11 is directly opposite to the center circular hole of the current-voltage transformer 2, and the center of the cable sheath inlets 11 is also directly opposite to the center of the coaxial cable outer clamp 9, and the center of the coaxial cable inner core clamp 9, so that the cable sheath inlets are on the same horizontal line, thereby ensuring the convenience of threading connection.
In the technical scheme that this application provided, data collection station 5 is used for accomplishing the collection of electric current, voltage, humiture, discharge number, accomplishes functions such as local control and local communication radio communication and data teletransmission, warning simultaneously, and data collection station 5 installation is fixed at the back of terminal insulation board fixed plate 10, adopts the bunch mode to fix.
In the technical scheme provided by the application, please refer to fig. 4 again, the outer fixture 8 of the coaxial cable is composed of an outer fixture base 801 of the coaxial cable and a clamping tongue 802 of the outer fixture of the coaxial cable, and the base and the clamping tongue are both half-open oval U-shaped openings and are designed to ensure the firmness of cable crimping.
In the technical solution provided in the present application, please refer to fig. 7, one end of the voltage limiting protector 3 is fixedly installed on the ground copper bar 7, and the distance is the same as the distance of the coaxial cable inner core clamp 9 to ensure that the coaxial cable inner core clamp is on the same horizontal line.
The application provides a technical scheme can monitor the inside humiture information of box, can prevent in advance that the box is inside to be affected with damp and lead to the trouble, humidity precision 2% RH, temperature precision 0.2 ℃, can gather the electric current in succession, voltage, the humiture value, show voltage in real time, the electric current, information such as humiture, adopt side magnetic induction formula to patrol and examine button switch, the internal integration light, can be convenient for the field personnel to patrol and examine, can be to ground cable trouble, the ground connection cable is lost, accurate monitoring is made to the number of discharges, help the unable problem of discovering the trouble of staff the very first time.
The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.
Claims (6)
1. The utility model provides a cable intelligence grounding box based on thing networking which characterized in that includes: the grounding box comprises a grounding box body (1), wherein a current and voltage transformer (2), a voltage limiting protector (3), a liquid crystal display screen (4) and a data collector (5) are arranged in the grounding box body (1);
the current and voltage transformer (2) is arranged on a transformer insulation fixing plate (6), two ends of the transformer insulation fixing plate (6) are fixed on the inner wall of the grounding box body (1), the voltage limiting protector (3) is fixed on a grounding copper bar (7), two ends of the grounding copper bar (7) are fixed on the inner wall of the grounding box body (1), the grounding copper bar (7) and the transformer insulation fixing plate (6) are parallel to each other, and the liquid crystal display screen (4) is fixed on the inner wall of the grounding box body (1) through a fixing support and is close to the inner wall of one side of the grounding box body (1);
the grounding box body (1) is internally provided with a plurality of coaxial cable outer-layer clamps (8) and a plurality of coaxial cable inner-core clamps (9), the plurality of coaxial cable outer-layer clamps (8) and the plurality of coaxial cable inner-core clamps (9) are all arranged on the terminal insulation fixing plate (10), the coaxial cable outer-layer clamps (8) are connected with the coaxial cable inner-core clamps (9) through copper bars, and the voltage limiting protector (3) is connected with the coaxial cable inner-core clamps (9) through copper bars;
the data collector (5) is arranged on the back face of the terminal insulation fixing plate (10), and the bottom of the grounding box body (1) is further provided with a plurality of cable sheath wire inlets (11) and a power supply communication port (12).
2. The intelligent cable grounding box based on the Internet of things of claim 1, further comprising: an LED illuminating lamp (13) and a magnetic induction type inspection switch (14);
LED light (13) set up inside ground connection case body (1), switch (14) welding is patrolled and examined to the magnetic induction formula on the outer wall of ground connection case body (1).
3. The intelligent cable grounding box based on the Internet of things as claimed in claim 1, wherein the grounding box body (1) comprises: a box body (101), a box cover (102) and an inspection window (103);
the box body (101) and the box cover (102) are hinged, and the inspection window (103) is embedded in the box cover (102) through a glass bead seal.
4. The intelligent cable grounding box based on the Internet of things as claimed in claim 3, wherein a box cover handle (104) is arranged on the box cover (102), a box hanging lug (105) is arranged outside the box body (101), the box body (101) is rectangular, and the box hanging lug (105) is arranged at the four corners of the rectangle of the box body (101).
5. The intelligent cable grounding box based on the Internet of things as claimed in claim 3, wherein the inspection window (103) is made of transparent material.
6. The intelligent cable grounding box based on the Internet of things as claimed in claim 1, wherein the coaxial cable outer clamp (8) comprises: the clamp comprises a coaxial cable outer layer clamp base (801) and a coaxial cable outer layer clamp clamping tongue (802);
the coaxial cable outer-layer fixture base (801) and the coaxial cable outer-layer fixture clamping tongue (802) are both provided with U-shaped openings, and the coaxial cable outer-layer fixture base (801) is connected with the coaxial cable outer-layer fixture clamping tongue (802) through a fixing bolt;
one end of the fixing bolt penetrates through the clamping tongue (802) of the outer-layer fixture of the coaxial cable, and the other end of the fixing bolt is screwed into the base (801) of the outer-layer fixture of the coaxial cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111332191.8A CN114094523A (en) | 2021-11-11 | 2021-11-11 | Cable intelligence grounding box based on thing networking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111332191.8A CN114094523A (en) | 2021-11-11 | 2021-11-11 | Cable intelligence grounding box based on thing networking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114094523A true CN114094523A (en) | 2022-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111332191.8A Pending CN114094523A (en) | 2021-11-11 | 2021-11-11 | Cable intelligence grounding box based on thing networking |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117607731A (en) * | 2024-01-22 | 2024-02-27 | 张家港乐达汽车电器有限公司 | Full-color LED electronic circuit display screen power failure detection method |
-
2021
- 2021-11-11 CN CN202111332191.8A patent/CN114094523A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117607731A (en) * | 2024-01-22 | 2024-02-27 | 张家港乐达汽车电器有限公司 | Full-color LED electronic circuit display screen power failure detection method |
| CN117607731B (en) * | 2024-01-22 | 2024-04-09 | 张家港乐达汽车电器有限公司 | Full-color LED electronic circuit display screen power failure detection method |
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