A line loss detection device based on current flow change and line arrangement
By introducing the arc-shaped motion and limit-extrusion mechanism of micro motor drive into the online loss detection device, the problems of automatic positioning and multi-cable detection are solved, and the work efficiency and use range are improved.
Patent Information
- Application Number
- CN202210379937.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-04-12
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2042-04-12
AI Technical Summary
The existing line loss detection device based on current flow change layout management lacks automatic positioning and clamping function, resulting in inefficiency of staff, complex positioning process and inconvenient positioning of multiple cables, and limited use range.
A device including a base plate, a micro motor, a movable plate, a placing plate and a micro detector was designed. The micro motor drives the turntable and the fixed block to rotate, and the movable plate makes arc-shaped movement, combining the limit rod and the extrusion plate to realize the cable. Automatic positioning and clamping simplifies the positioning process and supports simultaneous detection of multiple cables.
It realizes automatic positioning and clamping of cables, simplifies the positioning process, improves work efficiency, and supports simultaneous detection of multiple cables, expanding the scope of use of the device.
Smart Images

Figure CN114814414B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of line loss detection, and in particular to a line loss detection device based on current flow change and arranged in a row. Background Art
[0002] After a section of cable is used for a long time, some wear and tear will occur. At this time, the cable needs to be tested for line loss. According to the changes in different current amounts, the cable needs to be positioned and tested. At this time, a line loss detection device is needed, such as a line loss detection device and a detection method with publication number CN113534012A. It is divided into multiple detection sections. Each detection section of the wire is transported to the detection mechanism at one time by a transmission mechanism. The detection mechanism detects each detection section in sequence. The flipping mechanism can flip the wire at multiple angles, thereby realizing multi-point detection of the outer peripheral surface of the wire. However, it does not have the function of automatic positioning and clamping, which reduces the work efficiency of the staff.
[0003] At the same time, the existing line loss detection device based on current flow change arrangement has a relatively complicated positioning and clamping process when working, and it is not convenient to position multiple cables. The device has a small range of use and is greatly limited in use.
[0004] In view of the above problems, it is urgent to carry out innovative design based on the original line loss detection device based on the change of current flow. Summary of the invention
[0005] The purpose of the present invention is to provide a line loss detection device based on the change of current flow, so as to solve the problems proposed in the above background technology that the device does not have the function of automatic positioning and clamping, which reduces the work efficiency of the staff and the positioning and clamping process is relatively complicated during work. It is also inconvenient to position multiple cables, the device has a small range of use, and has great limitations when used.
[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a line loss detection device based on current flow change, comprising a bottom plate and a micro motor, a counterweight plate is fixedly mounted on the lower surface of the bottom plate, and a vertical plate is fixedly mounted on the upper surface of the bottom plate, and the central axis of the vertical plate is in a straight line with the central axis of the bottom plate;
[0007] The micro motor is fixedly mounted on the surface of the vertical plate, and the output end of the micro motor is fixedly connected to a rotating disk;
[0008] A line loss detection device based on current flow change and line arrangement, further comprising:
[0009] A connecting shaft, wherein the connecting shaft is fixedly mounted on the surface of the vertical plate, and the central axis of the connecting shaft, the central axis of the micro motor and the central axis of the vertical plate are in a straight line;
[0010] The columns are fixedly mounted on the upper surface of the base plate, and the columns are symmetrically distributed about the center of the base plate;
[0011] A movable plate, wherein a limiting groove is provided on the surface of the movable plate, and a placement groove is provided on the upper surface of the movable plate. When working, the cable to be tested is first placed on the movable plate so that the cable is level with the placement groove;
[0012] A placement plate, wherein the placement plate is slidably arranged inside the movable plate, and the surface of the placement plate is in contact with the inner wall of the movable plate, and a lap block is fixedly connected to the right side of the placement plate;
[0013] The micro detector is fixedly mounted on the inner wall of the movable plate, and the micro detector corresponds to the placement groove one by one. The micro detector can complete the detection of the cable.
[0014] Preferably, a fixed block is fixedly installed on the surface of the turntable, and a movable frame is sleeved and connected on the surface of the fixed block, and the movable frame is a hollow structure, and a connecting block is fixedly connected to the upper surface of the movable frame. When the cable is placed on the movable plate, the micro motor is started, the micro motor drives the turntable to rotate, the turntable drives the fixed block to rotate, and the fixed block drives the movable frame to rotate.
[0015] Preferably, the other side of the connecting block is sleeved and connected to the surface of the connecting shaft, and a semi-disc is fixedly installed on the surface of the connecting block, and a first tooth block is fixedly installed on the surface of the semi-disc, and the first tooth blocks are distributed at equal angles on the surface of the semi-disc. When the fixed block rotates, it drives the movable frame and the connecting block to rotate around the connecting shaft. At this time, the semi-disc rotates synchronously. When the micro motor and the turntable continue to rotate, the fixed block continues to drive the movable frame to rotate. When the fixed block rotates one circle, the semi-disc will make reciprocating circular movements.
[0016] Preferably, the lower surface of the movable plate is an arc-shaped structure, and a second tooth block corresponding to the first tooth block is fixedly installed on the lower surface of the movable plate, and a limit rod is fixedly installed on the surface of the column. When the semi-circular disk makes a reciprocating arc-shaped motion, the movable plate is driven to make a reciprocating arc-shaped motion through the first tooth block and the second tooth block.
[0017] Preferably, the limit rod corresponds to the limit groove one by one, and the limit rod is an arc-shaped structure, and the center of the limit rod is at the same point as the center of the movable plate. When the movable plate makes a reciprocating arc motion, the limit rod and the limit groove make the movement of the movable plate more stable, and the center of the limit rod is at the same point as the center of the movable plate, so that the limit rod will not hinder the movement of the movable plate.
[0018] Preferably, the placement grooves are evenly spaced on the upper surface of the movable plate, and a card plate is fixedly installed on the upper surface of the overlapping block. When the movable plate is making a reciprocating arc motion, the cables will roll on the upper surface of the movable plate and eventually enter the placement grooves. There is no need for staff to place the cables one by one. After the cables enter the placement grooves, they will squeeze the placement plate, causing the placement plate to move downward, and the placement plate drives the overlapping block to move synchronously, and the overlapping block drives the card plate to descend synchronously.
[0019] Preferably, a deep groove is provided inside the movable plate, and an extrusion plate is slidably connected inside the movable plate, and a slot corresponding to the card plate is provided on the lower surface of the extrusion plate. Initially, the extrusion plate forms a locking structure with the movable plate through the card plate and the slot. When the card plate drops and moves out of the slot, the extrusion plate and the movable plate are not in a locked state.
[0020] Preferably, a second micro-spring that plays an elastic reset role is fixedly connected to the right side of the extrusion plate, and the other side of the second micro-spring is fixedly connected to the inner wall of the movable plate, and the second micro-spring is initially in a compressed state, and the surface of the extrusion plate fits the inner wall of the movable plate. When the extrusion plate and the movable plate are not in an engaged state, the second micro-spring pops out the extrusion plate, and the extrusion plate squeezes the cable into position, achieving the goal of automatic positioning, and the surface of the extrusion plate fits the inner wall of the movable plate, so that the extrusion plate only moves in the horizontal direction.
[0021] Preferably, a groove corresponding to the placement plate is opened inside the movable plate, and a first micro spring is fixedly installed on the lower surface of the placement plate, and the other side of the first micro spring is fixedly connected to the inner wall of the movable plate. When the placement plate moves into the groove, the first micro spring will be squeezed. After the work is completed, the squeezing plate is pushed into the deep groove to return to its original position. At this time, the cable can be taken out. At this time, the placement plate returns to its original position under the action of the first micro spring, which is convenient for the next use.
[0022] Preferably, a limit plate is fixedly installed on the upper surface of the movable plate, and the limit plates are symmetrically distributed about the center of the movable plate, and side plates are fixedly installed on the front and rear sides of the movable plate. During operation, the limit plates and side plates prevent the cables from moving out of the movable plate, thereby improving the overall stability of the device.
[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: the line loss detection device based on the current flow change arrangement line type adopts a new structural design, and its specific contents are as follows:
[0024] (1) When the line loss detection device based on current flow change arranges the line, the cable to be detected is placed on the movable plate so that the cable is level with the placement slot, and then the micro motor is started. At this time, the micro motor drives the turntable and the fixed block to rotate, and the fixed block drives the movable frame and the connecting block to rotate around the connecting axis. At this time, the movable plate makes a reciprocating arc motion under the action of the first tooth block and the second tooth block, and the limit rod and the limit slot make the movement of the movable plate more stable. When the movable plate makes a reciprocating arc motion, the cable will enter the placement slot, thus achieving the purpose of automatic positioning;
[0025] (2) After the cable enters the placement slot, the placement plate is squeezed by the cable. At this time, the placement plate drives the overlap block and the card plate to descend. When the card plate moves out of the card slot, the squeezing plate pops out under the action of the second micro spring. The squeezing plate squeezes the cable to position it, achieving the goal of automatic positioning. The surface of the squeezing plate fits with the inner wall of the movable plate, so that the squeezing plate can only move in the horizontal direction. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a schematic diagram of the front cross-sectional structure of the present invention;
[0027] Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle;
[0028] Figure 3 It is a partial front cross-sectional structural schematic diagram of the fixed block of the present invention in working state;
[0029] Figure 4 It is a partial front cross-sectional structural schematic diagram of the movable plate of the present invention in working state;
[0030] Figure 5 For the present invention Figure 1 The enlarged structural diagram at B in the middle;
[0031] Figure 6 This is a schematic diagram of the connection structure of the placement plate and the overlap block of the present invention;
[0032] Figure 7 It is a partial front cross-sectional structural schematic diagram of the extrusion plate of the present invention in working state;
[0033] Figure 8 It is a schematic diagram of the top view of the movable plate of the present invention.
[0034] In the figure: 1. bottom plate; 2. vertical plate; 3. micro motor; 4. turntable; 5. fixed block; 6. movable frame; 7. connecting block; 8. connecting shaft; 9. semicircular disk; 10. first tooth block; 11. movable plate; 12. second tooth block; 13. column; 14. limit rod; 15. limit groove; 16. limit plate; 17. side plate; 18. placement groove; 19. placement plate; 20. groove; 21. first micro spring; 22. overlap block; 23. clamping plate; 24. extrusion plate; 25. clamping groove; 26. deep groove; 27. second micro spring; 28. micro detector. DETAILED DESCRIPTION
[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0036] See also Figure 1-8 The present invention provides a technical solution: a line loss detection device based on current flow change, comprising a bottom plate 1 and a micro motor 3, a counterweight plate is fixedly installed on the lower surface of the bottom plate 1, and a vertical plate 2 is fixedly installed on the upper surface of the bottom plate 1, and the central axis of the vertical plate 2 is in a straight line with the central axis of the bottom plate 1;
[0037] The micro motor 3 is fixedly mounted on the surface of the vertical plate 2, and the output end of the micro motor 3 is fixedly connected to the turntable 4;
[0038] A line loss detection device based on current flow change and line arrangement, further comprising:
[0039] A connecting shaft 8, wherein the connecting shaft 8 is fixedly mounted on the surface of the vertical plate 2, and the central axis of the connecting shaft 8, the central axis of the micro motor 3 and the central axis of the vertical plate 2 are in a straight line;
[0040] The columns 13 are fixedly mounted on the upper surface of the bottom plate 1, and the columns 13 are symmetrically distributed about the center of the bottom plate 1;
[0041] The movable plate 11 has a limiting groove 15 on its surface and a placement groove 18 on its upper surface;
[0042] A placement plate 19, the placement plate 19 is slidably disposed inside the movable plate 11, and the surface of the placement plate 19 is in contact with the inner wall of the movable plate 11, and a lap block 22 is fixedly connected to the right side of the placement plate 19;
[0043] The micro detector 28 is fixedly mounted on the inner wall of the movable plate 11 , and the micro detector 28 corresponds to the placement groove 18 one by one.
[0044] A fixed block 5 is fixedly installed on the surface of the turntable 4 , and a movable frame 6 is sleeved and connected on the surface of the fixed block 5 . The movable frame 6 is a hollow structure, and a connecting block 7 is fixedly connected to the upper surface of the movable frame 6 .
[0045] The other side of the connecting block 7 is sleeved and connected to the surface of the connecting shaft 8, and a semi-circular disc 9 is fixedly installed on the surface of the connecting block 7, and a first tooth block 10 is fixedly installed on the surface of the semi-circular disc 9, and the first tooth blocks 10 are distributed at equal angles on the surface of the semi-circular disc 9.
[0046] The lower surface of the movable plate 11 is an arc-shaped structure, and a second tooth block 12 corresponding to the first tooth block 10 is fixedly installed on the lower surface of the movable plate 11 , and a limit rod 14 is fixedly installed on the surface of the column 13 .
[0047] The limiting rod 14 corresponds to the limiting groove 15 one by one, and the limiting rod 14 is an arc-shaped structure, and the center of the limiting rod 14 and the center of the movable plate 11 are at the same point.
[0048] During work, the staff first places the cable to be tested on the movable plate 11 so that the cable is level with the placement groove 18, and then starts the micro motor 3 on the surface of the vertical plate 2. At this time, the micro motor 3 drives the turntable 4 and the fixed block 5 to rotate, and the fixed block 5 drives the movable frame 6 and the connecting block 7 to rotate around the connecting shaft 8. When the turntable 4 and the fixed block 5 continue to rotate, the connecting block 7 will make a reciprocating arc motion around the connecting shaft 8, and the connecting block 7 will drive the semi-circular disk 9 to move synchronously. At this time, the movable plate 11 makes a reciprocating arc motion under the action of the first tooth block 10 and the second tooth block 12, and the limiting rod 14 on the surface of the column 13 and the limiting groove 15 inside the movable plate 11 make the movement of the movable plate 11 more stable, and the center of the limiting rod 14 is at the same point as the center of the movable plate 11, so that the limiting rod 14 will not hinder the movement of the movable plate 11, and when the movable plate 11 makes a reciprocating arc motion, the cable will shake and finally enter the placement groove 18, thus achieving the purpose of automatic positioning.
[0049] The placement grooves 18 are evenly spaced on the upper surface of the movable plate 11 , and a clamping plate 23 is fixedly mounted on the upper surface of the overlapping block 22 .
[0050] A deep groove 26 is formed inside the movable plate 11 , and a pressing plate 24 is slidably connected inside the movable plate 11 . A clamping groove 25 corresponding to the clamping plate 23 is formed on the lower surface of the pressing plate 24 .
[0051] A second micro spring 27 that plays an elastic reset role is fixedly connected to the right side of the extrusion plate 24, and the other side of the second micro spring 27 is fixedly connected to the inner wall of the movable plate 11. The second micro spring 27 is initially in a compressed state, and the surface of the extrusion plate 24 fits against the inner wall of the movable plate 11.
[0052] A groove 20 corresponding to the placement plate 19 is formed inside the movable plate 11 , and a first micro spring 21 is fixedly mounted on the lower surface of the placement plate 19 , and the other side of the first micro spring 21 is fixedly connected to the inner wall of the movable plate 11 .
[0053] A limit plate 16 is fixedly mounted on the upper surface of the movable plate 11 , and the limit plates 16 are symmetrically distributed about the center of the movable plate 11 , and side plates 17 are fixedly mounted on both the front and rear sides of the movable plate 11 .
[0054] Initially, the extrusion plate 24 forms an engaging structure with the movable plate 11 through the card plate 23 and the card slot 25. The second micro spring 27 is in a compressed state. After the cable enters the placement groove 18, the placement plate 19 is squeezed by the cable. At this time, the placement plate 19 moves toward the inside of the groove 20. At the same time, the placement plate 19 squeezes the first micro spring 21. The placement plate 19 drives the lap block 22 and the card plate 23 to descend synchronously. When the card plate 23 moves out of the card slot 25, the extrusion plate 24 and the movable plate 11 are not in an engaged state. At this time, the extrusion plate 24 pops out under the action of the second micro spring 27, and the extrusion plate 24 squeezes the cable to position it, achieving self- The purpose of dynamic positioning is that the surface of the extrusion plate 24 fits with the inner wall of the movable plate 11, so that the extrusion plate 24 only moves in the horizontal direction. Finally, the micro-detector 28 completes the detection. The clamping and positioning process is simple and fast, and multiple cables can be clamped at the same time. After the detection, the extrusion plate 24 is pushed toward the inner direction of the deep groove 26. At this time, the staff can take out the cable from the placement groove 18. When the card slot 25 and the card plate 23 are in the same vertical direction, the placement plate 19 rebounds under the action of the first micro-spring 21, that is, the overlap block 22 and the card plate 23 rebound, and finally the card plate 23 will re-enter the card slot 25 for the next use.
[0055] Working principle: When using the line loss detection device based on current flow change, first place the device at the location where it needs to work. Figure 1-8When working, the staff first places the cable to be tested on the movable plate 11, so that the cable is level with the placement slot 18, and then starts the micro motor 3. At this time, the micro motor 3 drives the turntable 4 and the fixed block 5 to rotate, and the fixed block 5 drives the movable frame 6 and the connecting block 7 to rotate around the connecting shaft 8. When the turntable 4 and the fixed block 5 continue to rotate, the connecting block 7 and the semi-circular disk 9 will make a reciprocating arc motion around the connecting shaft 8. At this time, the movable plate 11 makes a reciprocating arc motion under the action of the first tooth block 10 and the second tooth block 12. At this time, the cable will shake and finally enter the placement slot 18, that is, the purpose of automatic positioning is achieved;
[0056] After the cable enters the placement groove 18, the placement plate 19 is squeezed by the cable, and the placement plate 19 drives the overlap block 22 and the card plate 23 to descend synchronously. When the card plate 23 moves out of the card groove 25, the squeezing plate 24 and the movable plate 11 are not in a locked state. At this time, the squeezing plate 24 pops out under the action of the second micro spring 27, and the squeezing plate 24 squeezes and positions the cable, achieving the purpose of automatic clamping. Finally, the detection is completed through the micro detector 28. The clamping and positioning process is simple and fast, and multiple cables can be clamped at the same time.
[0057] The above is the working process of the entire device, and the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.
[0058] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0059] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0060] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A line loss detection device based on current flow change and arranged in a row, comprising a base plate (1) and a micro motor (3), wherein a counterweight plate is fixedly mounted on the lower surface of the base plate (1), and a vertical plate (2) is fixedly mounted on the upper surface of the base plate (1), and the central axis of the vertical plate (2) is in a straight line with the central axis of the base plate (1); The micro motor (3) is fixedly mounted on the surface of the vertical plate (2), and the output end of the micro motor (3) is fixedly connected to a rotating disk (4); It is characterized in that Also includes: A connecting shaft (8), the connecting shaft (8) being fixedly mounted on the surface of the vertical plate (2), and the central axis of the connecting shaft (8), the central axis of the micro motor (3) and the central axis of the vertical plate (2) are in a straight line; A column (13), the column (13) being fixedly mounted on the upper surface of the base plate (1), and the columns (13) being symmetrically distributed about the center of the base plate (1); A movable plate (11), wherein a limiting groove (15) is provided on the surface of the movable plate (11), and a placement groove (18) is provided on the upper surface of the movable plate (11); A placement plate (19), the placement plate (19) being slidably disposed inside the movable plate (11), with the surface of the placement plate (19) being in contact with the inner wall of the movable plate (11), and a lap block (22) being fixedly connected to the right side of the placement plate (19); A micro detector (28), wherein the micro detector (28) is fixedly mounted on the inner wall of the movable plate (11), and the micro detector (28) corresponds one-to-one to the placement groove (18).
2. According to claim 1, a line loss detection device based on current flow change and arranged in a row, characterized in that: A fixed block (5) is fixedly mounted on the surface of the rotating disk (4), and a movable frame (6) is sleeved and connected to the surface of the fixed block (5); the movable frame (6) is a hollow structure, and a connecting block (7) is fixedly connected to the upper surface of the movable frame (6).
3. The line loss detection device based on current flow change and arrangement type according to claim 2 is characterized by: The other side of the connecting block (7) is sleeved and connected to the surface of the connecting shaft (8), and a semi-circular disc (9) is fixedly mounted on the surface of the connecting block (7), and a first tooth block (10) is fixedly mounted on the surface of the semi-circular disc (9), and the first tooth blocks (10) are distributed at equal angles on the surface of the semi-circular disc (9).
4. The line loss detection device based on current flow change and arrangement type according to claim 3 is characterized by: The lower surface of the movable plate (11) is an arc-shaped structure, and a second tooth block (12) corresponding to the first tooth block (10) is fixedly mounted on the lower surface of the movable plate (11), and a limiting rod (14) is fixedly mounted on the surface of the column (13).
5. The line loss detection device based on current flow change and arrangement type according to claim 4 is characterized in that: The limiting rod (14) corresponds to the limiting groove (15) one by one, and the limiting rod (14) is an arc-shaped structure, and the center of the limiting rod (14) and the center of the movable plate (11) are at the same point.
6. The line loss detection device based on current flow change and arrangement type according to claim 1 is characterized by: The placement grooves (18) are distributed at equal intervals on the upper surface of the movable plate (11), and a clamping plate (23) is fixedly mounted on the upper surface of the overlapping block (22).
7. The line loss detection device based on current flow change and arrangement type according to claim 6 is characterized by: A deep groove (26) is provided inside the movable plate (11), and a pressing plate (24) is slidably connected inside the movable plate (11), and a clamping groove (25) corresponding to the clamping plate (23) is provided on the lower surface of the pressing plate (24).
8. The line loss detection device based on current flow change and arrangement type according to claim 7 is characterized by: A second micro spring (27) having an elastic reset function is fixedly connected to the right side of the extrusion plate (24), and the other side of the second micro spring (27) is fixedly connected to the inner wall of the movable plate (11), and the second micro spring (27) is initially in a compressed state, and the surface of the extrusion plate (24) is in contact with the inner wall of the movable plate (11).
9. The line loss detection device based on current flow change and arrangement type according to claim 1 is characterized by: A groove (20) corresponding to the placement plate (19) is provided inside the movable plate (11), and a first micro spring (21) is fixedly mounted on the lower surface of the placement plate (19), and the other side of the first micro spring (21) is fixedly connected to the inner wall of the movable plate (11).
10. The line loss detection device based on current flow change and arrangement type according to claim 1 is characterized by: A limit plate (16) is fixedly mounted on the upper surface of the movable plate (11), and the limit plates (16) are symmetrically distributed about the center of the movable plate (11), and side plates (17) are fixedly mounted on both the front and rear sides of the movable plate (11).
Citation Information
Patent Citations
Line loss detection device and detection method
CN113534012A
Electric wire loss detection device
CN112305365A
Power distribution network line loss detection device
CN213581211U