CN118033191B - Information acquisition wiring port and method for intelligent ammeter error estimation - Google Patents
Information acquisition wiring port and method for intelligent ammeter error estimation Download PDFInfo
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- CN118033191B CN118033191B CN202410439159.7A CN202410439159A CN118033191B CN 118033191 B CN118033191 B CN 118033191B CN 202410439159 A CN202410439159 A CN 202410439159A CN 118033191 B CN118033191 B CN 118033191B
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 230000017525 heat dissipation Effects 0.000 claims abstract description 9
- 238000003780 insertion Methods 0.000 claims abstract description 5
- 230000037431 insertion Effects 0.000 claims abstract description 5
- 239000000428 dust Substances 0.000 abstract description 4
- 230000002265 prevention Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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Abstract
An information acquisition wiring port and method for intelligent ammeter error estimation belong to the ammeter field. The side surface of the ammeter is provided with a groove; the inserting port is arranged in the groove; two sliding grooves I are symmetrically arranged on the top wall and the bottom wall of the groove, and a round groove communicated with the sliding groove I is further formed in one end, close to the insertion port, of each sliding groove I; the side surface of each rotating plate is fixedly connected with a rectangular block which is in sliding fit with the corresponding chute I; a transmission rod is arranged in each limit groove; the plug interface is matched with a plug, and an insulating handle is arranged on the plug; two sides of the insulating handle are provided with sliding grooves II which are in sliding fit with the corresponding transmission rods. According to the invention, the plug is not required to be inserted into the plug interface, the situation that the plug interface is damaged due to the fact that the plug is reversely inserted into the plug interface is avoided, dust prevention and plug fixing can be performed through the rotating plate, the situation that the plug is loosened due to external force is prevented, heat dissipation can be performed, and the situation that the service life of the plug interface is reduced due to overhigh heat during working of the plug interface is avoided.
Description
Technical Field
The invention relates to an information acquisition wiring port and method for intelligent ammeter error estimation, and belongs to the field of ammeter.
Background
In the use process of the conventional electric meter on the market, the insertion direction of the plug needs to be observed firstly when the plug is plugged into the wiring port, so that the situation that the plug is damaged due to reverse plug plugging is avoided, particularly when the operation is performed in an electric meter box, the electric meter in the electric meter box is relatively dense, the observation of the plug is very troublesome, and the plug of the conventional electric meter on the market is easy to accumulate dust to influence the use of the plug; after the plug is inserted into the plug interface, the plug is easy to loosen under the action of external force, so that the plug is required to be improved.
Disclosure of Invention
The invention aims to solve the problems in the background art and provides an information acquisition wiring port and method for estimating the error of an intelligent ammeter.
The invention achieves the above purpose, adopts the following technical scheme:
An information acquisition wiring port for intelligent ammeter error estimation comprises an ammeter, a plug-in port and a movable device; the side surface of the ammeter is provided with a groove; the plug-in port is arranged in the groove; limiting grooves are formed in two sides of the inner wall of the groove, and the two limiting grooves are different in height; two sliding grooves I are symmetrically formed in the top wall and the bottom wall of the groove, and a round groove communicated with the sliding grooves I is further formed in one end, close to the insertion port, of each sliding groove I; the movable device comprises two rotating plates; the side surface of each rotating plate is fixedly connected with a rectangular block which is in sliding fit with the corresponding chute I; a transmission rod is arranged in each limit groove; the plug interface is matched with a plug, and an insulating handle is arranged on the plug; and sliding grooves II which are in sliding fit with the corresponding transmission rods are formed in two sides of the insulating handle.
The control device is also included; the control device comprises a spring I, an L-shaped push plate, an air bag I, an L-shaped connecting pipe, a spring II, a limiting ring, an L-shaped movable block and an air bag II; a chute III communicated with the limiting grooves is further formed in the inner wall of each limiting groove, and a clamping groove is formed in the inner wall of each chute III; one end of the spring I is fixedly connected to the inner wall of the chute III, the other end of the spring I is fixedly connected with the L-shaped push plate, the L-shaped push plate is in sliding fit with the chute III, and two sides of the L-shaped push plate are fixedly connected with clamping blocks in sliding fit with the clamping grooves; the connecting pipe is fixedly connected to the inner wall of the limiting groove, and two ends of the connecting pipe are fixedly connected with the air bags I and II respectively; the air bag I is positioned between the L-shaped push plate and the inner wall of the limit groove; the limiting ring is fixedly connected to the inner wall of the horizontal end of the connecting pipe; one end of the spring II is fixedly connected to the inner wall of the connecting pipe, and the other end of the spring II penetrates through the limiting ring and is fixedly connected with the movable block.
The diameter of the circular groove is equal to the length of the diagonal line of the rectangular block; the side surface of each rectangular block is also fixedly connected with a shaft rod, the shaft rod is connected with a connecting ring through a bearing, and a coil spring is arranged between the shaft rod and the connecting ring; the outer circular surface of the connecting ring is fixedly connected with the free end of the multistage elastic telescopic rod, and the fixed end of the multistage elastic telescopic rod is fixedly connected to the inner wall of the chute I.
One of the limit grooves is positioned in the middle of the inner wall of the groove.
The transmission rod is hinged on the inner wall of the limit groove through a spring hinge.
When the direction of the plug is opposite to that of the plug interface, the transmission rod is pushed by the insulating handle to rotate and is contacted with the L-shaped push plate, so that the L-shaped push plate presses the air bag I, the movable block is driven to move towards the direction of the air bag II by air pressure, and the horizontal end of the movable block is used for limiting the rotation of the rotating plate.
The side surface of the connecting end of the connecting pipe and the air bag II is fixedly connected with a pipeline which is communicated with the connecting pipe; the other end of the pipeline is fixedly connected with a sleeve, a sliding rod in sliding fit with the sleeve is arranged in the sleeve, and a spring III is arranged between the sliding rod and the sleeve; the sleeve is communicated with the pipeline; and heat dissipation grooves are also formed in two sides of the plug-in port.
A cavity is formed in the rotating plate, and one end, close to the inner wall of the groove, of the rotating plate is hollowed out; the opposite surfaces of the two rotating plates are hinged with arc-shaped movable plates through spring hinges.
When the plug is inserted into the plug interface, the movable plate is contacted with the corresponding sliding rod.
The use method of the information acquisition wiring port for intelligent ammeter error estimation comprises the following steps:
Step one: inserting the plug into the groove and then pushing the plug inwards;
Step two: when the plug is reversely inserted, the transmission rod drives the movable block to move, and the rotation plate is limited to rotate, so that the plug is prevented from contacting with the plug interface, and the plug interface is prevented from being damaged;
Step three: when the plug is inserted in the forward direction, the rotating plate is abutted against the side face of the insulating handle, and heat dissipation is carried out through the inner cavity of the rotating plate.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the plug is not required to be inserted into the plug interface, the situation that the plug interface is damaged due to the fact that the plug is reversely inserted into the plug interface is avoided, dust prevention and plug fixing can be performed through the rotating plate, the situation that the plug is loosened due to external force is prevented, heat dissipation can be performed, and the situation that the service life of the plug interface is reduced due to overhigh heat during working of the plug interface is avoided.
Drawings
Fig. 1 is a plan view of an information acquisition wiring port for estimating an error of a smart meter according to the present invention;
FIG. 2 is a front view of an information acquisition wiring port for error estimation of a smart meter according to the present invention;
FIG. 3 is a front view of an insulated handle of an information acquisition wiring port for smart meter error estimation according to the present invention;
FIG. 4 is a top view of an electric meter of an information acquisition wiring port for smart meter error estimation of the present invention;
Fig. 5 is a schematic structural diagram of a control device of an information acquisition wiring port for error estimation of a smart meter according to the present invention;
Fig. 6 is a schematic diagram of a structure of a movable block of an information acquisition wiring port for error estimation of a smart meter according to the present invention;
FIG. 7 is a schematic diagram of a mobile device of an information acquisition connection port for error estimation of a smart meter according to the present invention;
FIG. 8 is a side view of a mobile device of the information acquisition wiring port for smart meter error estimation of the present invention;
Fig. 9 is a schematic structural diagram of a plug forward plugged into a plug interface of an information acquisition wiring port for error estimation of a smart meter according to the present invention;
FIG. 10 is an enlarged schematic view of the structure of FIG. 9A;
FIG. 11 is a schematic diagram showing a structure in which a plug of an information acquisition wiring port for error estimation of a smart meter is reversely inserted into an interface;
fig. 12 is an enlarged schematic view of the structure of B in fig. 11.
In the figure: 1. an electricity meter; 2. an interface; 3. a groove; 31. a heat sink; 32. a circular groove; 33. a limit groove; 34. a chute III; 35. a clamping groove; 36. a transmission rod; 37. a chute I; 4. a control device; 41. a spring I; 42. an L-shaped push plate; 43. an air bag I; 44. a connecting pipe; 45. a spring II; 46. a limiting ring; 47. a movable block; 48. an air bag II; 49. a pipe; 410. a slide bar; 411. a sleeve; 412. a spring III; 5. a movable device; 51. a rotating plate; 52. a cavity; 53. a movable plate; 54. a multi-stage elastic telescopic rod; 55. rectangular blocks; 56. a shaft lever; 57. a connecting ring; 6. a plug; 7. an insulating handle; 71. and a chute II.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present invention are all within the protection scope of the present invention.
The first embodiment is as follows: as shown in fig. 1-12, this embodiment describes an information collection connection port for estimating an error of a smart meter, including a meter 1, a plug interface 2, and a mobile device 5; the side surface of the ammeter 1 is provided with a groove 3; the plug-in port 2 is arranged in the groove 3; limiting grooves 33 are formed in two sides of the inner wall of the groove 3, and the heights of the two limiting grooves 33 are different; two sliding grooves I37 are symmetrically formed in the top wall and the bottom wall of the groove 3, and a round groove 32 communicated with the sliding grooves I37 is further formed in one end, close to the insertion port 2, of each sliding groove I37; the mobile means 5 comprise two rotating plates 51; a rectangular block 55 which is in sliding fit with the corresponding chute I37 is fixedly connected to the side surface of each rotating plate 51; a transmission rod 36 is arranged in each limit groove 33; the plug interface 2 is matched with the plug 6, and the plug 6 is provided with an insulating handle 7; two sides of the insulating handle 7 are provided with sliding grooves II 71 which are in sliding fit with the corresponding transmission rods 36. The limit grooves 33 with different heights are matched with the sliding grooves II 71 on the side face of the insulating handle 7, so that the plug 6 is prevented from being reversely inserted into the plug connector 2 to be damaged.
The diameter of the circular groove 32 is equal to the length of the diagonal line of the rectangular block 55; the side surface of each rectangular block 55 is also fixedly connected with a shaft lever 56, the shaft lever 56 is connected with a connecting ring 57 through a bearing, and a coil spring is also arranged between the shaft lever 56 and the connecting ring 57; the outer circular surface of the connecting ring 57 is fixedly connected with the free end of the multistage elastic telescopic rod 54, and the fixed end of the multistage elastic telescopic rod 54 is fixedly connected to the inner wall of the chute I37. The rectangular block 55 is allowed to rotate in the circular groove 32, and the rotating plate 51 is allowed to rotate.
One of the limit grooves 33 is located at the middle position of the inner wall of the groove 3.
The transmission rod 36 is hinged on the inner wall of the limit groove 33 through a spring hinge.
Also comprises a control device 4; the control device 4 comprises a spring I41, an L-shaped push plate 42, an air bag I43, an L-shaped connecting pipe 44, a spring II 45, a limiting ring 46, an L-shaped movable block 47 and an air bag II 48; a chute III 34 communicated with the limiting grooves 33 is further arranged on the inner wall of each limiting groove 33, and a clamping groove 35 is formed in the inner wall of each chute III 34; one end of the spring I41 is fixedly connected to the inner wall of the chute III 34, the other end of the spring I41 is fixedly connected with the L-shaped push plate 42, the L-shaped push plate 42 is in sliding fit with the chute III 34, and clamping blocks in sliding fit with the clamping grooves 35 are fixedly connected to two sides of the L-shaped push plate 42; the connecting pipe 44 is fixedly connected to the inner wall of the limit groove 33, and two ends of the connecting pipe 44 are fixedly connected with the air bag I43 and the air bag II 48 respectively; the air bag I43 is positioned between the L-shaped push plate 42 and the inner wall of the limit groove 33; the limiting ring 46 is fixedly connected to the inner wall of the horizontal end of the connecting pipe 44; one end of the spring II 45 is fixedly connected to the inner wall of the connecting pipe 44, and the other end of the spring II 45 penetrates through the limiting ring 46 to be fixedly connected with the movable block 47. When the plug is inserted reversely, the rotation of the rotating plate 51 is limited by the control device 4, so that the plug 6 is prevented from contacting the plug-in port 2.
When the direction of the plug 6 is opposite to that of the socket 2, the transmission rod 36 is pushed by the insulating handle 7 to rotate and is contacted with the L-shaped push plate 42, so that the L-shaped push plate 42 presses the air bag I43, and the movable block 47 is driven to move towards the direction of the air bag II 48 by air pressure, so that the horizontal end of the movable block 47 limits the rotation of the rotating plate 51.
The side surface of the connecting end of the connecting pipe 44 and the air bag II 48 is fixedly connected with a pipeline 49, and the pipeline 49 is communicated with the connecting pipe 44; the other end of the pipe 49 is fixedly connected with a sleeve 411, a sliding rod 410 which is in sliding fit with the sleeve 411 is arranged in the sleeve 411, and a spring III 412 is arranged between the sliding rod 410 and the sleeve 411; the sleeve 411 communicates with the conduit 49; the two sides of the plug-in port 2 are also provided with heat dissipation grooves 31.
A cavity 52 is formed in the rotating plate 51, and one end, close to the inner wall of the groove 3, of the rotating plate 51 is hollowed out; the opposite faces of the two rotating plates 51 are hinged with arc-shaped movable plates 53 through spring hinges. When the plug 6 is inserted in the forward direction, the movable plate 53 can be pushed to rotate by the sliding rod 410, so that a channel capable of replacing gas is formed, and heat dissipation is performed.
When the plug 6 is inserted into the socket 2, the movable plate 53 contacts with the corresponding slide bar 410.
The use method of the information acquisition wiring port for intelligent ammeter error estimation comprises the following steps:
step one: inserting the plug 6 into the recess 3 and then pushing it inward;
Step two: when the plug 6 is reversely inserted, the transmission rod 36 drives the movable block 47 to move so as to limit the rotation of the rotating plate 51, thereby preventing the plug 6 from contacting the plug interface 2 and damaging the plug interface 2;
Step three: when the plug 6 is inserted in the forward direction, the rotating plate 51 abuts against the side face of the insulating handle 7 and radiates heat through the inner cavity 52 thereof.
The working principle of the invention is as follows: when the device is used, the plug 6 is inserted into the groove 3 and then pushed inwards;
When the plug 6 is inserted reversely, as shown in fig. 11 and 12, as the heights of the two limiting grooves 33 are different, and the two sides of the insulating handle 7 are provided with the sliding grooves II 71 which are matched with the height of the transmission rod 36 in the forward direction when the plug 6 is inserted reversely, the insulating handle 7 can push the transmission rod 36 to rotate, the transmission rod 36 drives the L-shaped push plate 42 to slide along the sliding groove III 34 after rotating, the L-shaped push plate 42 pushes the air bag I43 to shrink, so that the air in the air bag I43 flows along the connecting pipe 44, the movable block 47 is pushed to move in the direction away from the limiting ring 46, the spring II 45 is stretched, the horizontal end of the movable block 47 moves into the air bag II 48, the vertical end of the movable block 47 shields the communicating position between the connecting pipe 44 and the pipeline 49, after the plug 6 pushes the rotating plate 51 to move inwards into the circular groove 32, the plug 6 continues to move inwards to push the rotating plate 51 to rotate, the horizontal end of the movable block 47 is contacted with the rotating plate 51 in the process of rotating the rotating plate 51, and the rotating plate is further limited, so that the plug 6 is prevented from contacting the inserting port 2 when the plug 6 is inserted reversely, and the situation of damaging the inserting port 2 is prevented;
When the plug 6 is inserted forward, as shown in fig. 9 and 10, the sliding groove ii 71 is in sliding fit with the transmission rod 36, so that the transmission rod 36 is not driven to rotate after the insulating handle 7 is contacted with the transmission rod 36, and after the plug 6 is contacted with the rotating plate 51, the rotating plate 51 is continuously moved inwards by the insulating handle 7 against the rotating plate 51 until the plug 6 is inserted into the plug-in port 2 due to the influence of the rectangular block 55 and the sliding groove i 37 when the plug 6 pushes the rotating plate 51 to move, the rotating plate 51 can not rotate and can only move along the direction of the sliding groove i 37 until the rectangular block 55 moves into the circular groove 32, the shaft lever 56 coincides with the circle center of the circular groove 32, and the rotating plate 51 is continuously pushed to rotate around the shaft lever 56 by continuously pushing the plug 6;
When the plug 6 is inserted positively, the air bag II 48 is compressed in the rotating process of the rotating plate 51, so that air in the air bag II 48 enters the pipeline 49 through the communication position between the connecting pipe 44 and the pipeline 49 and finally enters the sleeve 411, the air pressure is increased to push the sliding rod 410 to be in contact with the movable plate 53, when the plug 6 and the plug-in port 2 work for heat dissipation, the heat is increased, the air is expanded to further drive the sliding rod 410 to continuously move in the direction away from the sleeve 411, and further drive the movable plate 53 to rotate, so that the heat dissipation groove 31 is communicated with the cavity 52 in the rotating plate 51, and then hot air flows are discharged through the cavity 52 and the hollowed-out end of the rotating plate 51, so that the service life is prevented from being influenced by overhigh temperature;
after the plug 6 is pulled out, the rotating plate 51 moves to the original position under the action of the coil spring and the multi-stage elastic telescopic rod 54, and shields the groove 3 to prevent dust from entering.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (4)
1. An information acquisition wiring port for intelligent ammeter error estimation, which is characterized in that: comprises an ammeter (1), a plug-in port (2) and a movable device (5); a groove (3) is formed in the side face of the ammeter (1); the plug-in port (2) is arranged in the groove (3); limiting grooves (33) are formed in two sides of the inner wall of the groove (3), and the two limiting grooves (33) are different in height; two sliding grooves I (37) are symmetrically arranged on the top wall and the bottom wall of the groove (3), and one end, close to the insertion port (2), of each sliding groove I (37) is also provided with a round groove (32) communicated with the sliding groove I (37); the movable device (5) comprises two rotating plates (51); the side surface of each rotating plate (51) is fixedly connected with a rectangular block (55) which is in sliding fit with the corresponding chute I (37); a transmission rod (36) is arranged in each limit groove (33); the plug-in port (2) is matched with the plug (6), and an insulating handle (7) is arranged on the plug (6); two sides of the insulating handle (7) are provided with sliding grooves II (71) which are in sliding fit with corresponding transmission rods (36);
Also comprises a control device (4); the control device (4) comprises a spring I (41), an L-shaped push plate (42), an air bag I (43), an L-shaped connecting pipe (44), a spring II (45), a limiting ring (46), an L-shaped movable block (47) and an air bag II (48); a chute III (34) communicated with the limiting grooves (33) is further arranged on the inner wall of each limiting groove, and a clamping groove (35) is formed in the inner wall of each chute III (34); one end of the spring I (41) is fixedly connected to the inner wall of the chute III (34), the other end of the spring I (41) is fixedly connected with the L-shaped push plate (42), the L-shaped push plate (42) is in sliding fit with the chute III (34), and clamping blocks in sliding fit with the clamping grooves (35) are fixedly connected to two sides of the L-shaped push plate (42); the connecting pipe (44) is fixedly connected to the inner wall of the limiting groove (33), and two ends of the connecting pipe (44) are fixedly connected with the air bag I (43) and the air bag II (48) respectively; the air bag I (43) is positioned between the L-shaped push plate (42) and the inner wall of the limit groove (33); the limiting ring (46) is fixedly connected to the inner wall of the horizontal end of the connecting pipe (44); one end of the spring II (45) is fixedly connected to the inner wall of the connecting pipe (44), and the other end of the spring II (45) penetrates through the limiting ring (46) to be fixedly connected with the movable block (47);
The diameter of the circular groove (32) is equal to the length of the diagonal line of the rectangular block (55); the side surface of each rectangular block (55) is fixedly connected with a shaft lever (56), the shaft lever (56) is connected with a connecting ring (57) through a bearing, and a coil spring is arranged between the shaft lever (56) and the connecting ring (57); the outer circular surface of the connecting ring (57) is fixedly connected with the free end of the multistage elastic telescopic rod (54), and the fixed end of the multistage elastic telescopic rod (54) is fixedly connected to the inner wall of the chute I (37);
one of the limit grooves (33) is positioned in the middle of the inner wall of the groove (3);
The transmission rod (36) is hinged on the inner wall of the limit groove (33) through a spring hinge;
When the direction of the plug (6) is opposite to that of the plug-in port (2), the transmission rod (36) is pushed by the insulating handle (7) to rotate and is contacted with the L-shaped push plate (42), so that the L-shaped push plate (42) presses the air bag I (43), the movable block (47) is driven to move towards the direction of the air bag II (48) through air pressure, and the horizontal end of the movable block (47) is used for limiting the rotation of the rotating plate (51);
a pipeline (49) is fixedly connected to the side surface of the connecting end of the connecting pipe (44) and the air bag II (48), and the pipeline (49) is communicated with the connecting pipe (44); the other end of the pipeline (49) is fixedly connected with a sleeve (411), a sliding rod (410) which is in sliding fit with the sleeve (411) is arranged in the sleeve (411), and a spring III (412) is arranged between the sliding rod (410) and the sleeve (411); the sleeve (411) is communicated with a pipeline (49); and heat dissipation grooves (31) are also formed in the two sides of the plug-in port (2).
2. The information collection terminal port for error estimation of a smart meter according to claim 1, wherein: a cavity (52) is formed in the rotating plate (51), and one end, close to the inner wall of the groove (3), of the rotating plate (51) is hollowed out; the opposite surfaces of the two rotating plates (51) are hinged with arc-shaped movable plates (53) through spring hinges.
3. The information collection terminal port for error estimation of a smart meter according to claim 2, wherein: when the plug (6) is inserted into the plug interface (2), the movable plate (53) is contacted with the corresponding sliding rod (410).
4. The method for using the information collection wiring port for error estimation of a smart meter according to claim 3, wherein: the using method comprises the following steps:
Step one: inserting the plug (6) into the groove (3) and then pushing the plug inwards;
Step two: when the plug (6) is reversely inserted, the transmission rod (36) drives the movable block (47) to move, and the rotation plate (51) is limited to rotate, so that the plug (6) is prevented from being contacted with the plug interface (2), and the plug interface (2) is prevented from being damaged;
step three: when the plug (6) is inserted in the forward direction, the rotating plate (51) is abutted against the side face of the insulating handle (7) and radiates heat through the inner cavity (52) of the rotating plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202410439159.7A CN118033191B (en) | 2024-04-12 | 2024-04-12 | Information acquisition wiring port and method for intelligent ammeter error estimation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410439159.7A CN118033191B (en) | 2024-04-12 | 2024-04-12 | Information acquisition wiring port and method for intelligent ammeter error estimation |
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| CN118033191B true CN118033191B (en) | 2024-06-11 |
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