Calibration device and calibration method

Abstract

The invention discloses a calibrating device and a calibrating method. The calibrating device comprises a base and a plurality of current columns. The plurality of current columns are respectively connected to the base, each current column extends along a first direction, and each current column is arranged along a second direction crossed with the first direction; in the first verification state, a first verification group and a second verification group formed by the current column modules are used for correspondingly verifying two three-phase mutual inductor access type electric energy meters; in the second verification state, a third verification group and a fourth verification group formed by the current column modules are used for correspondingly verifying two three-phase direct access type electric energy meters; and in the third verification state, a fifth verification group, a sixth verification group and a seventh verification group formed by the current column modules are used for correspondingly verifying three single-phase electric energy meters. According to the invention, the compatibility of the single-phase electric energy meter and the three-phase electric energy meter can be improved, so that the current column of the calibrating device is more accurately butted with the single-phase electric energy meter and the three-phase electric energy meter.

Description

Technical Field

[0001] The present invention relates to the field of electric energy meter calibration, and in particular to a calibration device and a calibration method. Background Art

[0002] Driven by the rapid development of smart grids, automated detection technology for energy metering equipment faces an urgent need to improve device compatibility. As core metering devices, the adaptability of the calibration systems for energy meters and three-phase meters is directly related to detection efficiency and grid reliability. However, existing technologies in this area still have significant shortcomings.

[0003] The current mainstream detection equipment generally adopts a fixed probe structure, and its design basis is mainly adapted to the terminal layout of traditional electricity meters. However, there are essential differences in the current terminal structure between single-phase electricity meters and three-phase electricity meters: the former has a wider terminal spacing and a larger aperture, while the latter has the characteristics of reduced spacing and reduced aperture. This significant difference in structural parameters makes it difficult for conventional detection probes to achieve reliable physical docking when switching between equipment types, causing systematic adaptation problems such as poor contact and positioning offset. Even more serious is that the mismatch in the geometric parameters of the terminal and the probe will cause serious degradation of electrical performance. When the detection current reaches a high load condition, the imbalance of the current density distribution at the contact interface will lead to abnormal temperature rise, posing a safety hazard of overheating and damage to the detection equipment. Summary of the Invention

[0004] The main purpose of the present invention is to propose a calibration device and a calibration method, which can improve the compatibility of single-phase electricity meters and three-phase electricity meters, so that the current column of the calibration device can be more accurately connected with the single-phase electricity meter and the three-phase electricity meter.

[0005] To achieve the above objectives, some embodiments of the present invention provide a verification device, which has a first verification state for verifying a three-phase transformer-connected electric energy meter, a second verification state for verifying a three-phase direct-connected electric energy meter, and a third verification state for verifying a single-phase electric energy meter. The verification device includes:

[0006] base;

[0007] A plurality of current calibration columns are respectively connected to the base, each current calibration column extends along a first direction, and each current calibration column is arranged along a second direction intersecting the first direction; in a first calibration state, each current column at least jointly forms a first calibration group and a second calibration group arranged along the second direction, and the first calibration group and the second calibration group are used to calibrate two three-phase transformer-connected electric energy meters; in a second calibration state, each current column at least jointly forms a third calibration group and a fourth calibration group arranged in sequence along the second direction, and the third calibration group and the fourth calibration group are used to calibrate two three-phase direct-connected electric energy meters; in a third calibration state, each current column at least jointly forms a fifth calibration group, a sixth calibration group and a seventh calibration group arranged in sequence along the second direction, and the fifth calibration group, the sixth calibration group and the seventh calibration group are used to calibrate three single-phase electric energy meters;

[0008] Among them, the first calibration group and the second calibration group both include a first phase calibration column group, a second phase calibration column group, a third phase calibration column group and a neutral line calibration column group, and one of the first phase calibration column group, the second phase calibration column group and the third phase calibration column group includes a current input calibration column module and a current output calibration column, and the current input calibration column module and the current output calibration column are configured to be able to approach or move away from each other along the second direction.

[0009] In some embodiments, the calibration device includes a tray, which is used to carry three single-phase electricity meters or two three-phase electricity meters. The calibration device includes a positioning block centered along the second direction, and the positioning block has two through holes passing through along the first direction. When switching from the first state to the third state, the current terminals passed through the through holes in the three states are still passed through the through holes to position the three-phase electricity meter and the single-phase electricity meter.

[0010] In some embodiments, the verification device includes first and second drive assemblies, wherein the first and second drive assemblies are connected to a base;

[0011] The first and second driving components are configured to drive at least one of the current input verification column module and the current output verification column in the first phase verification column group to move closer to or away from the other along the second direction; and / or,

[0012] The first and second driving components are configured to drive at least one of the current input verification column module and the current output verification column in the second phase verification column group to move closer to or away from the other along the second direction; and / or,

[0013] The first and second driving components are configured to drive at least one of the current input verification column module and the current output verification column in the third phase verification column group to approach or move away from the other along the second direction.

[0014] The first and second driving components are configured to drive the zero line verification column group to move leftward and rightward along the second direction.

[0015] In some embodiments, the first and second driving assemblies include first and second driving cylinders and a driving plate, the first and second driving cylinders are connected to the base, the driving plate is connected to the first driving cylinder, and the first driving cylinder is configured to drive the driving plate to move along the first direction;

[0016] The driving plate includes a plurality of driving holes, each driving hole extends obliquely relative to the first direction, and each driving hole is arranged along the second direction. Each current verification column includes a detection end and a driving end. The detection end is used to insert a single-phase electric energy meter or a three-phase electric energy meter. The driving end is provided with a driving protrusion, and each driving protrusion extends into each driving hole one by one, so that when the driving plate moves horizontally along the first direction, the corresponding current verification column is driven to move horizontally along the second direction.

[0017] In some embodiments, the driving hole includes a first hole segment and a second hole segment that are connected to each other, and the first hole segment is located on a side of the second hole segment close to the detection end;

[0018] The first driving cylinder is configured to drive the driving plate to move from a first position to a second position along a first direction, so that the driving protrusion moves relative to the driving plate from an end of the first hole segment away from the second hole segment to an end close to the second hole segment;

[0019] The second drive assembly also includes a second drive cylinder, which is connected to the base. The second drive cylinder is configured to drive the drive plate to move from the second position to the third position along the first direction, so that each drive protrusion moves relative to the drive plate from the end of the first hole segment close to the second hole segment to the end of the second hole segment away from the first hole segment.

[0020] In some embodiments, along the first direction, the first hole segment and the second hole segment have different inclination angles;

[0021] Each first hole segment extends along the first direction detection end, and is used to accommodate each driving protrusion to reciprocate between the first position and the second position; each second hole segment extends along the first direction driving end, and is used to accommodate each driving protrusion to reciprocate between the second position and the third position.

[0022] The first and eighth driving holes from left to right on the driving plate are used to accommodate the current input calibration column module driving protrusions in the first phase calibration column group of two three-phase transformer-connected electric energy meters; the second and ninth driving holes from left to right on the driving plate are used to accommodate the current output calibration column driving protrusions in the first phase calibration column group of two three-phase transformer-connected electric energy meters.

[0023] The third and tenth driving holes from left to right on the driving plate are used to accommodate the current input calibration column module driving protrusions in the second phase calibration column group of two three-phase transformer-connected electric energy meters; the fourth and eleventh driving holes from left to right on the driving plate are used to accommodate the current output calibration column driving protrusions in the second phase calibration column group of two three-phase transformer-connected electric energy meters.

[0024] The fifth and twelfth driving holes from left to right on the driving plate are used to accommodate the current input calibration column module driving protrusions in the third phase calibration column group of two three-phase transformer-connected electric energy meters; the sixth and thirteenth driving holes from left to right on the driving plate are used to accommodate the current output calibration column driving protrusions in the third phase calibration column group of two three-phase transformer-connected electric energy meters.

[0025] The seventh and fourteenth drive holes on the drive plate from left to right are used to accommodate the drive protrusions of the two three-phase transformer-connected electric energy meters' zero-line calibration column groups.

[0026] In some embodiments, the first state is a default state;

[0027] The third driving assembly includes a third driving cylinder and a driving plate, the third driving cylinder is connected to the base, the driving plate is connected to the third driving cylinder, and the third driving cylinder is configured to drive the driving plate to move along the first direction;

[0028] The third driving component intelligently avoids the zero-line voltage input of the three-phase direct-access electric energy meter of the two zero-line verification column groups to the verification column, so that the current verification column forms the first verification group and the second verification group relative to the base.

[0029] In some embodiments, when the first state is switched to the second state, the first driving component drives the current input verification column and the current output verification column to move along the second direction;

[0030] The first driving assembly includes a first driving cylinder and a driving plate, the first and second driving cylinders are connected to the base, the driving plate is connected to the first driving cylinder, and the first driving cylinder is configured to drive the driving plate to move along a first direction;

[0031] The fourth driving assembly includes a fourth driving cylinder and a driving plate, the fourth driving cylinder is connected to the base, the driving plate is connected to the fourth driving cylinder, and the fourth driving cylinder is configured to drive the driving plate to move along the first direction;

[0032] The first driving component is configured to drive the current verification columns of the third verification group and the fourth verification group, so that the driven current verification columns move relative to the base in the second direction, and the fourth driving component intelligently avoids the voltage input verification columns of the first to third phase current input verification column modules of the two three-phase transformer-connected electric energy meters and the zero-line voltage input verification columns of the two neutral-line verification column groups, together forming the third verification group and the fourth verification group;

[0033] In some embodiments, the fifth verification group, the sixth verification group, and the seventh verification group are all configured to be suitable for verifying a single-phase electric energy meter;

[0034] The first and second driving assemblies include first and second driving cylinders and a driving plate, the first and second driving cylinders are connected to the base, the driving plate is connected to the first driving cylinder, and the first and second driving cylinders are configured to drive the driving plate to move along a first direction;

[0035] The fourth driving assembly includes a fourth driving cylinder and a driving plate, the fourth driving cylinder is connected to the base, the driving plate is connected to the fourth driving cylinder, and the fourth driving cylinder is configured to drive the driving plate to move along the first direction;

[0036] The fifth driving assembly includes a fifth driving cylinder and a driving plate, the fifth driving cylinder is connected to the base, the driving plate is connected to the fifth driving cylinder, and the fifth driving cylinder is configured to drive the driving plate to move along the first direction;

[0037] The calibration device further includes a first drive assembly connected to the base; the first drive assembly is configured to drive the current calibration columns of the third calibration group and the fourth calibration group, so that the driven current calibration columns move relative to the base in a second direction to form the third calibration group and the fourth calibration group;

[0038] The calibration device further includes a second drive assembly connected to the base; the second drive assembly is configured to drive the current calibration columns of the fifth, sixth, and seventh calibration groups so that the driven current calibration columns move relative to the base in the second direction to form the fifth, sixth, and seventh calibration groups; the second drive assembly is configured to drive the first-phase and second-phase calibration column groups in the first calibration group so that the driven current calibration columns move relative to the base in the second direction to form the fifth calibration group together with the fifth calibration group; and / or. The second drive assembly is configured to drive "the zero-line voltage input calibration column of the three-phase direct-connected electric energy meter in the neutral-line calibration column group in the first calibration group, the current input calibration column module current input calibration column of the first-phase calibration column group in the second calibration group" and the two current terminals of the positioning block to form the sixth calibration group together; and / or. The second drive component is configured to drive "the current output calibration column of the second phase calibration column group of the second calibration group, the third phase calibration column group of the second calibration group, and the zero line voltage input calibration column of the second calibration group neutral line calibration column group three-phase direct-connected electric energy meter" to form the seventh calibration group together; at the same time: the fourth drive component intelligently avoids the voltage input calibration column of the first to third phase current input calibration column module of the first calibration group and the second calibration group and the three-phase transformer-connected electric energy meter zero line voltage input calibration column of its zero line calibration column group, and the fifth drive component intelligently avoids the current input calibration column of the current input calibration column module of the third phase calibration column group of the first calibration group.

[0039] In some embodiments, the testing device further includes a first auxiliary probe group and a second auxiliary probe group, both of which are movably connected to the base, the first auxiliary probe group including a plurality of first probes arranged along the second direction, and the second auxiliary probe group including a plurality of second probes arranged along the second direction;

[0040] In the first calibration state, the first auxiliary probe group slides along the first direction relative to the base to the first calibration position for calibrating two three-phase transformer-connected electricity meters, and the second auxiliary probe group slides along the first direction relative to the base to the second non-calibration position; in the second calibration state, the first auxiliary probe group slides along the first direction relative to the base to the first calibration position for calibrating two three-phase direct-connected electricity meters, and the second auxiliary probe group slides along the first direction relative to the base to the second non-calibration position; in the third calibration state, the second auxiliary probe group slides along the first direction relative to the base to the second calibration position for calibrating three single-phase electricity meters, and the first auxiliary probe group slides along the first direction relative to the base to the first non-calibration position.

[0041] In some embodiments, the first calibration group and the second calibration group both include a first phase calibration column group, a second phase calibration column group, a third phase calibration column group and a neutral line calibration column; one of the first phase calibration column group and the second phase calibration column group includes a current input calibration column module and a current output calibration column; the third phase calibration column group includes a current input calibration column module and a current output calibration column module; the neutral line calibration column is a three-phase direct-access electric energy meter neutral line voltage input calibration column compatible with a single-phase two-meter current input calibration column; the current input calibration column module includes a current input calibration column and a voltage input calibration column; the current output calibration column module includes a current output calibration column and a three-phase transformer-access electric energy meter voltage input calibration column; its characteristics are: when the first state is switched to the second state, the first drive component has only three distances to move, and when the second state is switched to the third state, the moving distance of the neutral line calibration column is reduced by more than 75%, and the overall movement resistance of the first and second drive components in the first direction is reduced (refer to 4b).

[0042] An embodiment of a second aspect of the present invention provides a verification method for use with any of the above verification devices, the verification method comprising:

[0043] Driving multiple verification groups to verify multiple single-phase electric energy meters one by one; wherein each verification group includes multiple current columns, each current column extends along a first direction, and each current column is arranged along a second direction intersecting the first direction;

[0044] driving at least one current column in one of the test groups to move in a second direction until it merges with another test group;

[0045] driving a current input verification column and a current output verification column in at least one verification group to move closer to or farther from each other along a second direction to adapt to a three-phase electric energy meter;

[0046] The calibration group after driving the adapted three-phase electric energy meter calibrates the three-phase electric energy meter; wherein, the three-phase electric energy meter includes a three-phase direct-access electric energy meter and a three-phase transformer-access electric energy meter, and the number of three-phase electric energy meters is less than the number of single-phase electric energy meters.

[0047] According to the above embodiments, the beneficial effects of the present invention are:

[0048] The calibration device of the present invention includes a base, which provides a stable foundation for the entire device. A plurality of current columns are connected to the base and extend along a first direction. These current columns are arranged in a second direction, and the second direction intersects with the first direction. In the first calibration state, these current columns at least form a first calibration group and a second calibration group together, and each calibration group is used to calibrate the three-phase transformer-connected electric energy meter. In this way, two three-phase transformer-connected electric energy meters can be calibrated at the same time, which improves work efficiency. In the second calibration state, the same current columns at least form a third calibration group and a fourth calibration group together, and these two calibration groups are used to calibrate the three-phase direct-connected electric energy meter. In the third calibration state, the same current columns at least form a fifth calibration group, a sixth calibration group and a seventh calibration group together, and these three calibration groups are used to calibrate the three single-phase electric energy meters. This design enables the same set of devices to adapt to the calibration needs of different types of equipment, increasing its flexibility.

[0049] Furthermore, the first calibration group and the second calibration group both include a first phase calibration column group, a second phase calibration column group, a third phase calibration column group and a neutral line calibration column group. One of the first phase calibration column group, the second phase calibration column group and the third phase calibration column group includes a current input calibration column module and a current output calibration column. The current input calibration column module includes a current input calibration column and a voltage input calibration column. The neutral line calibration column group includes a three-phase transformer-connected electric energy meter voltage input calibration column and a three-phase directly-connected electric energy meter voltage input calibration column. The calibration device is configured so that the current input calibration column module and the current output calibration column in a certain phase calibration column group can approach or move away from each other along the second direction. Specifically, when the calibration device is calibrating a single-phase electric energy meter with a larger terminal spacing, the current input calibration column and the current output calibration column move away from each other along the second direction, that is, the spacing between the current input calibration column and the current output calibration column becomes larger, so as to align with the terminals of the single-phase electric energy meter, thereby accurately inserting the single-phase electric energy meter; when the calibration device is calibrating a three-phase electric energy meter with a smaller terminal spacing, the current input calibration column and the current output calibration column move closer to each other along the second direction, so as to align with the terminals of the three-phase electric energy meter, thereby accurately inserting the three-phase electric energy meter.

[0050] In summary, the current column of the present application can accurately correspond to the terminal position of the single-phase electric energy meter and the three-phase electric energy meter, reduce wear and resistance during insertion, have better compatibility, and better safety.

[0051] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0053] Figure 1a This is a structural diagram of a three-phase transformer-connected electric energy meter placed on a tray in one embodiment of the present invention;

[0054] Figure 1b This is a structural diagram of a three-phase direct-access electric energy meter placed on a tray in one embodiment of the present invention;

[0055] Figure 2 This is a structural schematic diagram of a single-phase electric energy meter placed on a tray in one embodiment of the present invention;

[0056] Figure 3 A schematic diagram showing a comparison of the structures of a three-phase electric energy meter and a single-phase electric energy meter when placed on a tray in one embodiment of the present invention;

[0057] Figure 4a This is a schematic diagram of the structure of a three-phase electric energy meter and a single-phase electric energy meter in one embodiment of the present invention, which is intended to illustrate how the size difference between the two affects the operation of the calibration device;

[0058] Figure 4b This is a schematic diagram of the structure of a three-phase electric energy meter and a single-phase electric energy meter in another embodiment of the present invention, intended to illustrate how the size difference between the two affects the operation of the calibration device;

[0059] Figure 5 The schematic structural diagram of a three-phase electric energy meter and a single-phase electric energy meter in another embodiment of the present invention is intended to illustrate how the size difference between the two affects the operation of the calibration device;

[0060] Figure 6 The schematic structural diagram of a three-phase electric energy meter and a single-phase electric energy meter in another embodiment of the present invention is intended to illustrate how the size difference between the two affects the operation of the calibration device;

[0061] Figure 7This is a schematic diagram of a top view of a test device according to an embodiment of the present invention, which is intended to illustrate the driving method of the current column;

[0062] Figure 8 FIG. 4 is a flow chart of a testing method according to an embodiment of the present invention.

[0063] Description of Figure Numbers:

[0064] Three-phase electric energy meter 100; three-phase direct access electric energy meter 101; three-phase transformer access electric energy meter 102; Internet of Things meter 103; smart electric energy meter 104;

[0065] Single-phase electric energy meter 200; single-phase smart electric energy meter 201; single-phase IoT meter 202;

[0066] Tray 300; positioning block 310;

[0067] Current column 400; current input verification column module 410; current output verification column 420; current terminal 430; driving protrusion 401;

[0068] Driving plate 500; driving hole 510; first hole section 512; second hole section 511;

[0069] Voltage column 600;

[0070] Variable pitch module 700;

[0071] First direction X; second direction Y;

[0072] Figure 1: Three-phase transformer-connected energy meter: Phase A current input (IA+) terminal 1; Phase A voltage input (UA) terminal 2; Phase A current output (IA-) terminal 3; Phase B current input (IB+) terminal 4; Phase B voltage input (UB) terminal 5; Phase B current output (IB-) terminal 6; Phase C current input (IC+) terminal 7; Phase C voltage input (UC) terminal 8; Phase C current output (IC-) terminal 9; Neutral voltage input (UN) terminal 10; Three-phase energy meter auxiliary terminal 18.

[0073] Three-phase direct-access electric energy meter: A-phase current and voltage input (IA+, UA) terminal 11; A-phase current output (IA-) terminal 12; B-phase current and voltage input (IB+, UB) terminal 13; B-phase current output (IB-) terminal 14; C-phase current and voltage input (IC+, UC) terminal 15; C-phase current output (IC-) terminal 16; neutral voltage input (UN) terminal 17; three-phase electric energy meter auxiliary terminal 18.

[0074] Figure 2: Current and voltage input (I+, U+) terminal 01; current output (I-) terminal 02; voltage input (U-) terminal 03; voltage output terminal 04; single-phase electric energy meter auxiliary terminal 19.

[0075] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0076] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0077] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0078] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or", "and / or" or "and / or" appear in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0079] Next, referring to Figures 1 to Figure 8 , to describe the verification device and verification method of the present invention. Figure 2 and Figure 7The calibration device of the present invention includes a base, which provides a stable foundation for the entire device. A plurality of current columns 400 are connected to the base and extend along a first direction X. These current columns 400 are arranged in a second direction Y, and the second direction Y intersects with the first direction X. In the first calibration state, these current columns 400 at least jointly form a first calibration group and a second calibration group, and each calibration group is used to calibrate the three-phase transformer-connected electric energy meter 102. In this way, two three-phase transformer-connected electric energy meters 102 can be calibrated at the same time, thereby improving work efficiency. In the second calibration state, the same current columns 400 at least jointly form a third calibration group and a fourth calibration group, and these two calibration groups are used to calibrate the three-phase direct-connected electric energy meter 101. In the third calibration state, the same current columns 400 at least jointly form a fifth calibration group, a sixth calibration group and a seventh calibration group, and these three calibration groups are used to calibrate the three single-phase electric energy meters 200. Such as three-phase transformer-connected electric energy meter 102 or three-phase direct-connected electric energy meter 101 or single-phase electric energy meter 200, etc. This design enables the same set of devices to adapt to different types of equipment verification requirements, increasing its flexibility.

[0080] Furthermore, the first calibration group and the second calibration group both include a first phase calibration column group, a second phase calibration column group, a third phase calibration column group and a neutral line calibration group, and one of the first phase calibration column group, the second phase calibration column group and the third phase calibration column group includes a current input calibration column module 410 (including a current input calibration column and a voltage input calibration column) and a current output calibration column 420. The calibration device is configured so that the current input calibration column module 410 and the current output calibration column 420 in a certain phase calibration column group can approach or move away from each other along the second direction Y. Referring to Figures 1 to Figure 3 as well as Figure 5 and Figure 6 Specifically, when the calibration device is calibrating a single-phase electric energy meter 200 with a larger terminal spacing, the current input calibration column module 410 and the current output calibration column 420 move away from each other along the second direction Y, that is, the spacing between the current input calibration column module 410 and the current output calibration column 420 becomes larger, so as to align with the terminals of the single-phase electric energy meter 200, thereby accurately inserting the single-phase electric energy meter 200; when the calibration device is calibrating a three-phase electric energy meter 100 with a smaller terminal spacing, the current input calibration column module 410 and the current output calibration column 420 move closer to each other along the second direction Y, so as to align with the terminals of the three-phase electric energy meter 100, thereby accurately inserting the three-phase electric energy meter 100.

[0081] In summary, the current column 400 of the present application can accurately correspond to the terminal positions of the single-phase electric energy meter 200 and the three-phase electric energy meter 100, reduce wear and resistance during insertion, and have better compatibility and safety.

[0082] Regarding the first calibration group and the second calibration group, it can be understood that in some embodiments, all current calibration columns 400 and voltage input calibration columns 600 of the first calibration group and the second calibration group are used to be configured into the first calibration group and the second calibration group. In some embodiments, the neutral line voltage input calibration column 400 and current terminal 430 of the three-phase direct-connected electric energy meter of the first calibration group and the second calibration group are not used and do not participate in the calibration of the three-phase transformer-connected electric energy meter 102.

[0083] Regarding the switching of the first calibration group and the second calibration group to the third calibration group and the fourth calibration group, it can be understood that in some embodiments, all current columns 400 of the first calibration group and the second calibration group are used to be configured as the third calibration group and the fourth calibration group. In some embodiments, part of the current columns 400 of the first calibration group and the second calibration group are configured as the third calibration group and the fourth calibration group, and the other part of the current terminals 430 and the voltage terminals 600 are not used and do not participate in the calibration of the three-phase direct-access electric energy meter 101.

[0084] Regarding the switching of the third calibration group and the fourth calibration group to the fifth calibration group, the sixth calibration group and the seventh calibration group, it can be understood that in some embodiments, all current columns 400 of the first calibration group and the second calibration group are used to be configured into the fifth calibration group, the sixth calibration group and the seventh calibration group; in some embodiments, part of the current columns 400 of the first calibration group and the second calibration group are configured into the fifth calibration group, the sixth calibration group and the seventh calibration group, and the other part of the current columns 400 and the three-phase direct-access electric energy meter voltage input calibration column 600 are not used and do not participate in the calibration of the single-phase electric energy meter 200.

[0085] Furthermore, regarding the discontinuous switching between the first test group and the second test group, the third test group and the fourth test group, the fifth test group and the sixth test group, and the seventh test group, it can be understood that in some embodiments, the first test group and the second test group, the third test group and the fourth test group, the fifth test group and the sixth test group, and the seventh test group are sequentially arranged along the second direction Y at the same time:

[0086] In order to form the default first and second calibration groups: the zero-line voltage input calibration column 400 of the three-phase direct-connected electric energy meter of the two zero-line calibration column groups is not used, and is avoided in time when calibrating the three-phase transformer-connected electric energy meter 102.

[0087] In order to form the default third calibration group and fourth calibration group: the first calibration group and the second calibration group move toward the third calibration column group and the fourth calibration column group respectively, and the voltage input calibration column 600 of the three-phase transformer-connected electric energy meter of the first calibration group and the second calibration group is not used, and is avoided in time when calibrating the three-phase transformer-connected electric energy meter 102.

[0088] In order to form the fifth, sixth and seventh test groups: the first phase test column group of the third test group and the current test column 400 of the second phase test column group are moved toward the fifth test group to form the fifth test group; the third phase test column group of the third test group is moved toward the fifth test column group and is not used; the neutral line test group of the third test group is moved toward the positioning block, and the current input test column module of the first phase test column group of the fourth test group is moved toward the positioning block to form the sixth test group; the first phase test column of the fourth test group is moved toward the positioning block. The current output calibration column of the group and the current input calibration column module of the second phase calibration column group are moved toward the positioning block and are not used; the current output calibration column of the second phase calibration column group of the fourth calibration group, the third phase calibration column group, and the neutral line calibration group are moved toward the seventh calibration group to form the seventh calibration group; the voltage input calibration column of the three-phase transformer-connected electric energy meter of the first and second calibration groups and the current input calibration column 400 of the third phase calibration column group of the first calibration group are not used and are avoided in time when calibrating the single-phase electric energy meter 200.

[0089] on the contrary:

[0090] In order to form the third and fourth calibration groups, the fifth calibration group, the third phase calibration column group of the first calibration group, and the multiple current calibration columns 400 of the neutral line calibration column group (the sixth calibration group current input calibration column group) are moved toward the third calibration group, and all the current columns 400 together form the third calibration group; the sixth calibration group voltage output calibration column (the second calibration group first phase calibration column group current input calibration column module), the second calibration group first phase calibration column group current output calibration column and the second phase calibration column group current input calibration column module, and all the current calibration columns 400 of the seventh calibration group are moved toward the fourth calibration group, and together form the fourth calibration group. The current calibration columns 400 of the first and second calibration groups are all used to form the third and fourth calibration groups. The voltage input calibration columns of the three-phase transformer-connected electric energy meters of the first and second calibration groups are not used, and can be avoided in time when calibrating the three-phase direct-connected electric energy meter 101.

[0091] In order to form the first calibration group and the second calibration group: the third calibration group and the fourth calibration group move toward the first calibration column group and the second calibration column group respectively. The zero-line voltage input calibration column 400 of the three-phase direct-connected electric energy meter of the first calibration group and the second calibration group is not used, and is avoided in time when calibrating the three-phase transformer-connected electric energy meter 102.

[0092] One of the first phase verification column group, the second phase verification column group, and the third phase verification column group includes a current input verification column module 410 and a current output verification column 420. The current input verification column module 410 and the current output verification column 420 are configured to be able to move closer to or farther away from each other along the second direction Y. It is understandable that in some embodiments, only the current columns 400 in the first phase verification column group can move closer to or farther away from each other, in some embodiments, only the current columns 400 in the second phase verification column group can move closer to or farther away from each other, in some embodiments, only the current columns 400 in the third phase verification column group can move closer to or farther away from each other, and in some embodiments, the current columns 400 in the first phase verification column group, the second phase verification column group, and the third phase verification column group can all move closer to or farther away from each other relative to the current columns 400 in the same verification column group.

[0093] In some embodiments, the base can be designed to be height-adjustable to accommodate different working environments. The material of the current column 400 can be selected from materials with excellent electrical conductivity and corrosion resistance, such as copper alloy, to ensure stability during long-term use. For example, the current column 400 made of copper alloy not only ensures good electrical conductivity, but also enhances corrosion resistance and extends its service life. In addition, a touch screen interface can be provided on the base, through which the user can easily switch between the first calibration state, the second calibration state, and the third calibration state, as well as adjust the distance between each calibration group, thereby achieving accurate calibration of equipment of different specifications.

[0094] In some embodiments, the movement mechanism of the current column 400 can be manually adjusted or automatically adjusted, and driven by a built-in electric cylinder or motor, so that the current input calibration column module 410 and the current output calibration column 420 can more accurately and automatically adjust their positions as needed. For example, using a stepper motor to control the position adjustment of the current column 400 can not only improve the adjustment accuracy, but also reduce manual intervention and improve work efficiency. In addition, a variety of calibration modes can be pre-set for different calibration requirements. The user only needs to select the corresponding mode to quickly complete the equipment configuration, which greatly simplifies the operation process. In some embodiments, in order to improve the accuracy of manual adjustment, a guide rail can be set to limit the moving path and end position of the current column 400, thereby ensuring the accuracy of manual adjustment.

[0095] Reference Figure 7In some embodiments, the calibration device includes a first drive component, which is connected to the base and is used to drive any one of the current input calibration column module 410 and the current output calibration column 420 to move closer to or away from the other along the second direction Y. Specifically, the first drive component can independently drive the current column 400 in the first phase calibration column group, the second phase calibration column group, or the third phase calibration column group. For example, the first drive component is configured to drive one of the current input calibration column module 410 and the current output calibration column 420 in the first phase calibration column group to move closer to or away from the other along the second direction Y. The first drive component is configured to drive one of the current input calibration column module 410 and the current output calibration column 420 in the second phase calibration column group to move closer to or away from the other along the second direction Y. The first drive component is configured to drive one of the current input calibration column module 410 and the current output calibration column 420 in the third phase calibration column group to move closer to or away from the other along the second direction Y. This design allows for flexible adjustment of the distance between the current posts 400 based on the different hole spacings of three-phase and single-phase meters 100 and 200, thus accommodating a wider range of testing requirements. For example, when calibrating a smaller three-phase meter 100, the distance between the current input verification post module 410 and the current output verification post 420 can be reduced. Conversely, when calibrating a larger device, the distance between the two can be increased to ensure a smooth calibration process.

[0096] In some embodiments, an intelligent control system can be introduced to further enhance the functionality of the first drive assembly. For example, integrated sensors can monitor the position changes of the current pillars 400 and feed this data back to the control system, allowing the system to automatically adjust the positions of the current pillars 400 as needed. This not only improves adjustment accuracy but also prevents errors caused by human error. For example, a laser rangefinder can be used as a sensor to monitor the spacing between the current pillars 400 in real time. Any deviation detected would immediately notify the control system and make appropriate adjustments, ensuring the accuracy of each calibration.

[0097] In some embodiments, a backup cylinder is added so that even if one drive component fails, the backup drive component can continue the calibration task. For example, a dual drive cylinder configuration is configured, with one serving as the primary drive source and the other as a backup. Under normal circumstances, only the primary drive cylinder is in operation, while the backup drive cylinder is on standby. If the primary drive cylinder fails, the backup drive cylinder immediately takes over, ensuring that the calibration process is not affected. This design significantly improves system reliability and stability, reducing work interruptions caused by hardware failures.

[0098] Reference Figure 4a and Figure 4bThe calibration device includes a tray 300, which is used to carry three single-phase electricity meters 200 or two three-phase electricity meters 100. The calibration device includes a positioning block 310 arranged along the second direction Y. The positioning block 310 has two through holes passing through along the first direction X. When switching from the first state to the second and third states, the current terminals 430 passing through the through holes in various states are still passed through the through holes to position the three-phase electricity meters 100 and the single-phase electricity meters 200. By inserting a specific calibration column into the positioning block 310, it is ensured that the overall position of the calibration device remains unchanged before and after the switching position, that is, it will not be offset relative to the tray 300. At this time, reasonable planning of the positions of the single-phase electricity meter 200 and the three-phase electricity meter 100 on the tray 300 can avoid the offset of the single-phase electricity meter 200 and the three-phase electricity meter 100 relative to the calibration device during switching, that is, the current column 400 after adjustment of the calibration device will not offset the single-phase current meter or three-phase electricity meter 100 to be calibrated. It is only necessary to adjust the axis of the current column 400 microscopically to align with the axis of the terminal to be inserted.

[0099] Reference Figure 7 In some embodiments, the first driving assembly of the calibration device includes a first driving cylinder and a driving plate 500. The first driving cylinder is connected to the base, and the driving plate 500 is connected to the first driving cylinder so that the driving plate 500 can move along the first direction X. A plurality of driving holes 510 are provided on the driving plate 500. These driving holes 510 extend obliquely relative to the first direction X and are arranged along the second direction Y. Each current column 400 is independently arranged and is not associated with each other. Each current column 400 includes a detection end and a driving end. The detection end is used to insert the single-phase electric energy meter 200 or the three-phase electric energy meter 100, and the driving end is provided with a driving protrusion 401. Each driving protrusion 401 extends into the corresponding driving hole 510. When the driving plate 500 translates along the first direction X, the driving protrusion 401 slides in the driving hole 510, thereby driving the current column 400 to translate along the second direction Y. This design ensures that the spacing between the current input verification column module 410 and the current output verification column 420 can be adjusted as needed to accommodate devices under test of different specifications.

[0100] In this way, when the distance between the current input verification column module 410 and the current output verification column 420 needs to be adjusted, the first drive cylinder is activated, the drive plate 500 moves in the first direction X, and then the drive protrusion 401 in the drive hole 510 pushes the current column 400 in the second direction Y. For example, when calibrating a three-phase electric energy meter 100 with a smaller spacing, the drive cylinder moves the current input verification column module 410 and the current output verification column 420 inward; when calibrating a single-phase electric energy meter 200 with a larger spacing, the two are pulled outward. This mechanism not only improves operational flexibility but also ensures the accuracy of the calibration process.

[0101] In a further embodiment, the calibration device of the present application is equipped with a baffle. When the driving cylinder drives the current column 400 to move, the pitch change of the current column 400 is a smooth process, that is, the current column 400 can achieve a pitch change of any value between the minimum spacing and the maximum spacing. The baffle is added to lock the current column 400 in the pitch change process, so that the spacing of the current column 400 can be limited to any value between the minimum spacing and the maximum spacing, further improving the compatibility of the present application. It is understandable that when the current column 400 is locked in the pitch change process, if the extension length of the current column 400 is not enough, other structures that reduce the extension length of the current column 400 can be disassembled and detached to ensure that the current column 400 has sufficient extension length.

[0102] Reference Figure 7 In some embodiments, the drive hole 510 includes a first hole section 512 and a second hole section 512 that are interconnected, with the first hole section 512 being located on a side of the second hole section 511 that is closer to the detection end. The first drive cylinder is configured to drive the drive plate 500 to move along the first direction X from a first position to a second position, causing the drive protrusion 401 to move from an end of the first hole section 512 that is away from the second hole section 511 to an end closer to the second hole section 511. Furthermore, the second drive assembly includes a second drive cylinder connected to the base, configured to drive the drive plate 500 to move along the first direction X from the second position to a third position, causing the drive protrusion 401 to move from an end of the first hole section 512 that is closer to the second hole section 511 to an end of the second hole section 511 that is away from the first hole section 512.

[0103] In some embodiments, the driving hole 510 can be made of high-strength wear-resistant materials, such as ceramic materials, to improve its durability and precision, reduce wear problems caused by long-term use, and extend the service life of the equipment.

[0104] In some embodiments, the calibration device incorporates a self-cleaning function for the drive hole 510. For example, a micro-cleaning brush or air purge device is positioned within the drive hole 510. Whenever the drive plate 500 moves, the cleaning device automatically removes dust and debris from the drive hole 510, preventing accumulation of impurities that could affect the drive performance. This not only improves system reliability but also simplifies maintenance.

[0105] In some embodiments, an intelligent control system is introduced to optimize the operating efficiency of the drive hole 510. For example, a sensor is installed to monitor the status of the drive hole 510 and feed the data back to the control system. The control system automatically adjusts the parameters of the drive hole 510, such as the tilt angle, based on actual conditions to accommodate different calibration requirements. For example, a pressure sensor is used to monitor pressure changes within the drive hole 510. If an anomaly is detected, the control system immediately makes adjustments to ensure a smooth calibration process.

[0106] Reference Figure 7In some embodiments, the driving hole 510 of the calibration device is designed to include a first hole section 512 and a second hole section 511 that are connected to each other, and the first hole section 512 is located on the side of the second hole section 511 close to the detection end. Along the first direction X, the inclination angles of the first hole section 512 and the second hole section 511 are different, so that a more complex motion trajectory can be achieved when the driving plate 500 moves. For the current input calibration column module 410 and the current output calibration column 420 in the same phase calibration column group, the corresponding second hole sections 511 are inclined in opposite directions. This structure allows the current input calibration column module 410 and the current output calibration column 420 to approach or move away from each other along the second direction Y during the movement of the driving plate 500 during discontinuous movement. Similarly, the current input and output calibration columns in the second phase and third phase calibration column groups also adopt a similar design with opposite inclination directions to ensure that the spacing between each calibration column can be flexibly adjusted as needed. This design principle, based on the varying inclination angles of the drive holes 510, enables precise position adjustment of the current columns 400 through the translation of the drive plate 500 under the action of the first drive cylinder. The drive protrusions 401 of each current column 400 extend into the drive holes 510 in a one-to-one correspondence, and the movement of the drive plate 500 directly translates into displacement of the current column 400 along the second direction Y. This mechanism not only enhances the flexibility of the device but also ensures accuracy during the calibration process.

[0107] In some embodiments, to further optimize the design of the drive hole 510, a transition hole section can be added between the first hole section 512 and the second hole section 511. This transition hole section can reduce the impact force during the transition from the first hole section 512 to the second hole section 511, thereby extending the service life of the drive hole 510. For example, the transition hole section can be designed as an arc, allowing the drive protrusion 401 to pass more smoothly.

[0108] In some embodiments, a drive hole 510 is designed with an adjustable tilt angle. For example, a fine-tuning mechanism can be provided within the drive hole 510 to further modify the profile of the drive hole 510 and adjust the movement path of the current column 400. This fine-tuning mechanism allows the tilt angle to be adjusted according to specific needs. This allows the device to adapt to different testing requirements by simply adjusting the angle of the drive hole 510, even in different testing tasks. This improves the versatility and applicability of the device.

[0109] In some embodiments, the present invention integrates a module combining the current input terminals of each phase with their phase voltage input terminals, an independent module for the current output terminals of each phase, a combination of a three-phase transformer-connected electric energy meter and a three-phase direct-connected electric energy meter with a zero-line voltage input terminal into one module. Specifically, the module of the present invention supports a 2-position three-phase electric energy meter 100 with a phase current input terminal and a phase current output terminal with a spacing of 20mm. The module of the present invention is also compatible with a 3-position single-phase electric energy meter 200, and the current input and output terminal spacing of the single-phase electric energy meter 200 is 21mm. A method for realizing intelligent switching, intelligent avoidance, and time-sharing application through embedded control, pneumatic or electric drive. Specifically:

[0110] When switching from the first state (adapting to the three-phase transformer-connected electric energy meter 102) to the second state (adapting to the three-phase direct-connected electric energy meter 101), the first driving component drives the current input verification column module 410 and the current output verification column 420 to move along the second direction Y. Specifically, the current input verification column module 410 and the current output verification column 420 in the first phase verification column group, the second phase verification column group, and the third phase verification column group move the first, second, and third distances along the second direction Y, and the neutral voltage verification column group moves the fourth distance along the second direction Y;

[0111] When switching from the second state (adapting to the three-phase direct-connection electric energy meter 101) to the third state (adapting to the single-phase electric energy meter 200), the second driving component drives the current input verification column module 410 and the current output verification column 420 to move along the second direction Y. Specifically, the current input verification column module 410 and the current output verification column 420 and the neutral line verification column group in the first phase verification column group, the second phase verification column group, and the third phase verification column group move the fifth to eighteenth distances along the second direction Y.

[0112] For example, refer to Figure 5 and Figure 6 :

[0113] When switching from the first state (adapting to the three-phase transformer-connected electric energy meter 102) to the second state (adapting to the three-phase directly-connected electric energy meter 101), the first drive component drives the drive plate to move in the first direction, and the first and second calibration groups: the current input calibration column module 410 and the current output calibration column 420 in the first phase calibration column group move a first distance of 1.1 mm along the second direction; the current input calibration column module 410 and the current output calibration column 420 of the second phase calibration column group move a second distance of 2.6 mm along the second direction; the current input calibration column module 410 and the current output calibration column 420 of the third phase calibration column group move a third distance of 4.1 mm along the second direction; the neutral line calibration column group moves a fourth distance of 1.2 mm along the second direction.

[0114] When switching from the second state (adapting to the three-phase direct-access electric energy meter 101) to the third state (adapting to the single-phase electric energy meter 200), the second drive component drives the drive plate to move along the first direction, the third calibration group: the current input calibration column module 410 of the first phase calibration column group moves the fifth distance 7.9mm along the second direction, and the current output calibration column 420 moves the sixth distance 6.9mm along the second direction; the current input calibration column module 410 of the second phase calibration column group moves the seventh distance 1.4mm along the second direction, and the current output calibration column 420 moves the eighth distance 0.4mm along the second direction; the current input calibration column module 410 of the third phase calibration column group moves the ninth distance 4.0mm along the second direction, and the current output calibration column 420 moves the tenth distance 4.0mm along the second direction; the neutral line calibration column moves the eleventh distance 16.6mm along the second direction. The fourth calibration group: the current input calibration column module 410 of the first phase calibration column group moves the twelfth distance 8.5 mm along the second direction, and the current output calibration column 420 moves the thirteenth distance 0.0 mm along the second direction; the current input calibration column module 410 of the second phase calibration column group moves the fourteenth distance 4.5 mm along the second direction, and the current output calibration column 420 moves the fifteenth distance 4.0 mm along the second direction; the current input calibration column module 410 of the third phase calibration column group moves the sixteenth distance 9.5 mm along the second direction, and the current output calibration column 420 moves the seventeenth distance 10.5 mm along the second direction; the neutral line calibration column moves the eighteenth distance 16.0 mm along the second direction.

[0115] When switching from the first state (adapting to the three-phase transformer-connected electric energy meter 102) to the second state (adapting to the three-phase direct-connected electric energy meter 101), the 20mm spacing between the current input calibration column module 410 and the current output calibration column 420 does not change; when switching from the second state (adapting to the three-phase direct-connected electric energy meter 101) to the third state (adapting to the single-phase electric energy meter 200), the current input calibration column spacing is adjusted from 20mm to 21mm, which is an increase of 1mm. The difference between the terminal spacing of 20mm for the three-phase electric energy meter 100 and the terminal spacing of 21mm for the single-phase electric energy meter 200 is 1mm, so this solution can accurately adapt to the state from calibrating the three-phase electric energy meter 100 to calibrating the single-phase electric energy meter 200. In summary, this design ensures that when different types of equipment are calibrated, the spacing between the current columns 400 can accurately match the requirements of the equipment being tested.

[0116] In some embodiments, the first calibration group and the second calibration group are both configured to be suitable for calibrating the three-phase transformer-connected electric energy meter 102. These calibration groups are composed of a plurality of current columns 400, which extend along a first direction X and are arranged along a second direction Y. This structural design enables the current columns 400 to efficiently utilize space, ensuring that all calibration columns are fully utilized during the calibration process, thereby improving the calibration column utilization rate. Specifically, the current columns 400 are arranged according to a pre-set distance and position relationship to ensure that they can be accurately inserted into the corresponding terminal blocks of the three-phase transformer-connected electric energy meter 102. Since the terminal spacing of the three-phase transformer-connected electric energy meter 102 is usually fixed, the relative positions of the current columns 400 remain consistent, ensuring stability and reliability during the calibration process. Furthermore, the third and fourth calibration groups are configured for calibrating three-phase direct-access electric energy meters 101. These groups adapt to the terminal spacing required by different types of three-phase electric energy meters 100 by adjusting the distances between the first-phase calibration column group, the second-phase calibration column group, the third-phase calibration column group, and the neutral voltage calibration column group. The fifth, sixth, and seventh calibration groups are configured for calibrating single-phase electric energy meters 200. These groups adapt to the terminal spacing required by single-phase electric energy meters 200 by adjusting the distances between the current input calibration column module 410 and the current output calibration column 420. This flexible adjustment design ensures efficient and accurate calibration.

[0117] In some embodiments, specialized current column 400 combinations are designed to meet the specific requirements of different types of three-phase energy meters 100 (such as three-phase transformer-connected energy meters 102 or three-phase direct-connected energy meters 101). For example, customized current column 400 modules can be used for certain three-phase energy meters 100 with special interface specifications. These modules not only meet standard verification requirements but also provide additional functions such as overload protection or signal isolation.

[0118] In some embodiments, the calibration device further includes a second drive assembly connected to the base. The second drive assembly is configured to: drive the first phase calibration column group and the current column 400 of the second phase calibration column group of the third calibration group relative to the base in the second direction Y to form a fifth calibration group with the fifth calibration group; drive the neutral voltage calibration column group of the third calibration group toward the positioning block, the voltage terminal 430 of the positioning block, and the current input calibration column module 410 of the first phase calibration column group of the fourth calibration group toward the positioning block to form a sixth calibration group; and drive the current output calibration column 420, the third phase calibration column group 400, and the neutral voltage input calibration column of the second phase calibration column group of the fourth calibration group toward the seventh calibration group to form a seventh calibration group. This function enables the calibration device to flexibly respond to the calibration needs of different numbers and types of equipment. This dynamic adjustment mechanism ensures rapid transition between different tasks. By precisely controlling the position of the current column 400, each calibration group can quickly adapt to new calibration tasks without the need for manual rearrangement of the current column 400. This not only improves work efficiency but also reduces errors that may be caused by human operation, ensuring the reliability of each test result. Furthermore, the device has good compatibility: the first and second test groups, the third and fourth test groups, and the fifth, sixth, and seventh test groups all reuse current columns 400. This allows the test device to have fewer current columns 400, resulting in a smaller design.

[0119] Reference Figure 4a In some embodiments, the calibration device further includes a first auxiliary probe group and a second auxiliary probe group. The first auxiliary probe group and the second auxiliary probe group are both movably connected to the base, and respectively include a plurality of first probes and second probes arranged along the second direction Y. In the first and second calibration states, the first auxiliary probe group slides relative to the base along the first direction X to the first calibration position for calibrating two three-phase electric energy meters 100 (such as a three-phase direct-access electric energy meter 101 or a three-phase transformer-access electric energy meter 102); at the same time, the second auxiliary probe group slides along the first direction X to the second non-calibration position to ensure that the normal operation of the first calibration group is not interfered with. Each first probe in the first auxiliary probe group precisely corresponds to a specific detection point of the three-phase electric energy meter 100, which ensures that the electrical quantity signal can be accurately collected and transmitted to the corresponding measuring instrument for analysis.

[0120] In the third calibration state, the second auxiliary probe set slides relative to the base along the first direction X to the second calibration position, enabling calibration of the three single-phase energy meters 200. Simultaneously, the first auxiliary probe set moves to the first non-calibration position to prevent it from unnecessarily interfering with the current calibration process. This dynamic adjustment mechanism enables the calibration device to flexibly address the calibration requirements of different types of equipment, improving the device's overall applicability.

[0121] It is understood that in some embodiments, to further improve the accuracy of the test, an automatic calibration function can be introduced into the first and second auxiliary probe sets. For example, a built-in sensor can be used to monitor the actual contact pressure of the probes in real time and automatically adjust the probe pressure according to a preset standard value to ensure that each contact achieves the best effect.

[0122] Reference Figure 8 The second aspect of the present invention provides a verification method for use with the verification device of any of the above embodiments. The verification method includes:

[0123] S101: Default first state, used to calibrate two three-phase transformer-connected electric energy meters 102

[0124] S101-1: Drive the third driving component to move the zero-line voltage input verification column 400 of the three-phase direct-connected electric energy meter of the first and second verification groups to avoid the zero-line voltage input verification column 400 along the first direction X (driving end of the current verification column), thereby forming the first verification group and the second verification group;

[0125] S101-2: Simultaneously drive the first auxiliary probe group to slide along the first direction X to the first testing position (the testing end of the current testing column), and the second auxiliary probe group to slide along the first direction X to the second non-testing position (the driving end of the current testing column);

[0126] S102: In the default state, switching from the first state to the second state is performed to calibrate two three-phase direct-connection electric energy meters 101

[0127] S102-1: Drive the first driving assembly to drive the first phase, second phase, and third phase test column groups of the first and second test groups and the neutral voltage test column group to be arranged along the second direction Y intersecting the first direction X;

[0128] S102-2: Then drive the fourth drive component to move the three-phase transformer-connected electric energy meter voltage input voltage verification column (driving end of the current verification column) of the first phase, second phase, and third phase verification column groups of the first and second verification groups and the neutral voltage verification column group to avoid the voltage input voltage verification column (driving end of the current verification column), thereby forming the third and fourth verification groups;

[0129] S102-3: Simultaneously with S102-1, the first auxiliary probe group is driven to slide along the first direction to a first testing position (a testing end of the current testing column), and the second auxiliary probe group is driven to slide along the first direction to a second non-testing position (a driving end of the current testing column);

[0130] S103: In the default state, complete S102, and then switch from the second state to the third state, which is used to verify the three single-phase energy meters 200

[0131] S103-1: Drive the second drive assembly to drive the "first phase and second phase verification column group of the first verification group", "the third phase verification column group of the first verification group", "the neutral line voltage verification column group of the first verification group, two current terminals (fixed position) of the positioning block, and the first phase current input verification column module of the second verification group", "the first phase current output verification column and the second phase current input verification column module of the second verification group", and "the second phase current output verification column, the third phase verification column group, and the neutral line verification column group of the second verification group" to be arranged along the second direction Y intersecting the first direction X;

[0132] S103-2: Then drive the "fourth driving component to connect the three-phase transformer-connected electric energy meter voltage input voltage verification column of the first, second, and third phase verification column groups and the neutral voltage verification column group of the first and second verification groups" and the "fifth driving component to connect the current input verification column of the third phase current input verification column module of the first verification group" to avoid (driving end of the current verification column), forming the fifth, sixth, and seventh verification groups; among which the third phase current output verification column of the first verification group, the first phase current output verification column of the second verification group, and the current input verification column of the second phase current input verification column module do not interfere with the connection verification and do not need to avoid;

[0133] S103-3: Simultaneously with S103-1, the second auxiliary probe group is driven to slide along the first direction X to a second testing position (the testing end of the current testing column), and the first auxiliary probe group is driven to slide along the first direction X to a first non-testing position (the driving end of the current testing column);

[0134] Regarding the above method, first, the zero-line voltage input calibration column of the three-phase direct-access electric energy meter of the zero-line voltage input calibration column group is driven to avoid forming the first and second calibration groups. The multiple current columns 400 of the first and second calibration groups extend along the first direction X and are arranged along the second direction Y intersecting the first direction X to realize the calibration of the three single-phase electric energy meters; through this structural design, the number of current columns 400 is minimized and can be accurately inserted into the corresponding terminal of the three-phase transformer-access electric energy meter 102, thereby realizing stable and reliable calibration work.

[0135] Next, when the calibration needs to switch from the three-phase transformer-connected energy meter 102 to the three-phase direct-connected energy meter 101, the first, second, and third-phase calibration poles and the neutral line calibration poles of the first and second calibration groups are rearranged along the second direction Y, with the voltage input calibration poles moving out of the way, forming the third and fourth calibration groups. This dynamic adjustment mechanism enables the calibration device to quickly respond to different types of calibration tasks.

[0136] Then, the current input verification column module 410 and the current output verification column 420 in the drive verification group are moved closer to or farther away from each other along the second direction Y to adapt to the three single-phase electric energy meters 200. Specifically, when switching from the three-phase direct-access electric energy meter 101 to the single-phase electric energy meter 200, due to the different terminal spacing between the two, the current input verification column module 410 and the current output verification column 420 need to adjust the distance between them accordingly to form the fifth verification group, the sixth verification group, and the seventh verification group, which are suitable for verifying the three single-phase electric energy meters. This adjustment process relies on the precise control of the second drive component to ensure that each adjustment can meet the specific verification requirements.

[0137] On the contrary, the calibration group adapted to the three-phase electric energy meter 100 by the single-phase electric energy meter calibration drive calibrates the three-phase electric energy meter 100. The three-phase electric energy meter 100 mentioned here includes but is not limited to a three-phase direct-access electric energy meter 101, a three-phase transformer-access electric energy meter 102, etc. Since the number of these devices is usually less than the number of single-phase electric energy meters 200, the calibration device needs to have sufficient flexibility to handle a small but diverse number of calibration tasks. For example, three single-phase electric energy meters 200 are placed side by side along the second direction Y on the tray 300 for calibration. When the calibration device calibrates the three-phase electric energy meter 100, two three-phase electric energy meters 100 are placed along the second direction Y on the tray 300 for calibration. It is understandable that due to the coordination limitations of the current column 400 and the single-phase electricity meter 200 or the three-phase electricity meter 100, when more single-phase electricity meters or three-phase electricity meters 100 are placed, their number must be in a multiple relationship, for example, 6 single-phase electricity meters 200 correspond to 4 three-phase electricity meters 100, and 9 single-phase electricity meters 200 correspond to 6 three-phase electricity meters 100.

[0138] Next, referring to Figures 1 to Figure 8 , the calibration device and calibration method of the present application are described with specific embodiments. Among them, in order to distinguish and describe more specifically, the current input calibration column in the previous text is called the phase current and quantity input terminal, and the current output calibration column is called the phase current and quantity output terminal. Under the condition that the core principle remains unchanged, the reader can understand this solution according to the adaptively adjusted naming below, so as to have a more practical understanding of this solution. Specifically:

[0139] The present invention provides a "combination module of each phase current and quantity input terminal and its phase voltage input terminal, an independent module of each phase current and quantity output terminal, a combination module of the voltage input neutral wire terminal and the voltage input neutral wire terminal of a three-phase direct-access electric energy meter" based on a three-phase transformer-access electric energy meter. At the same time, the spacing between the phase current and quantity input and output terminals of a 2-meter-position three-phase electric energy meter and the aperture (7.5mm for the current terminal of the three-phase direct-access electric energy meter and 6mm for the current terminal of the three-phase transformer-access electric energy meter) are integrated into one module, and a positioning block and a 3-meter-position single-phase electric energy meter terminal (the spacing between the quantity input and output terminals is 21mm and the aperture is 7.5mm) are integrated into one module. The method adopts embedded control, pneumatic or electric drive to realize intelligent switching, intelligent avoidance and time-sharing application.

[0140] 1. Figure 2 As shown, a total of three single-phase energy meters 200, A, B, and C, are set up on a calibration line tray with a size of 410mm*410mm. Each single-phase energy meter 200 has four terminals, corresponding to the following terminal positions: A01, A02, A03, A04; B01, B02, B03, B04; and C01, C02, C03, C04. The center distance between the single-phase energy meters A, B, and C is 131mm. The terminals B02 and B03 of the single-phase energy meter B are used as the primary positioning reference, and the layout of the three single-phase energy meters 200 is positioned and designed.

[0141] 2. As shown in Figure 1, based on the primary positioning reference, the auxiliary terminal 18 of the three-phase electric energy meter is used as the secondary positioning reference to locate the three-phase electric energy meter D and E positions with a spacing of 194.6 mm. The terminals of the three-phase electric energy meter at position 2 are respectively provided with D1-D10 and E1-E10, thereby realizing the positioning of the three-phase electric energy meter;

[0142] 3. As shown in Figures 1 and 2, the spacing between terminals 1-3, 4-6, and 7-9 of three-phase transformer-connected energy meters is 20mm; the spacing between terminals 11-12, 13-14, and 15-16 of three-phase direct-connected energy meters is 20mm; the spacing between terminals 01-04 of single-phase energy meters is 21mm; the dimensions of the terminal blocks and the spacing between the terminal blocks are set according to the terminal block spacing deviation values of single-phase energy meter 200, three-phase transformer-connected energy meter 102, and three-phase direct-connected energy meter 101;

[0143] 4. Figure 4aAs shown, the terminal blocks of the three-phase transformer-connected energy meter 102 are grouped: D1-D2 are group 1, D3 are group 2, D4-D5 are group 3, D6 are group 4, D7-D8 are group 5, D9 are group 6, D10 plus the three-phase direct-connected energy meter terminal D17 are group 7, E1-E2 are group 9, E3 are group 10, E4-E5 are group 11, E6 are group 12, E7-E8 are group 13, E9 is group 14, and E10 plus the three-phase direct-connected energy meter terminal E17 are group 15; the B single-phase energy meters B02 and B03 are group 8.

[0144] 5. Figure 4a As shown, there are positioning blocks (limiting blocks) in the terminal blocks B02 and B03 of the single-phase electric energy meter 200 (in the middle blank position of the 2-position three-phase electric energy meter). The positioning blocks are 32.6mm high and 43mm long. The positioning blocks are provided with through holes to accommodate the terminal blocks B02 and B03. The 8 groups of terminal blocks are 0.2mm to the right of the center of the terminal hole of the B single-phase electric energy meter to facilitate the installation, connection and retraction of B02 and B03. The positioning blocks are fixedly installed on the meter connection seat. When B02 and B03 are connected and retracted, the positioning blocks remain fixed. The setting of the positioning blocks realizes that the variable pitch size of the intelligent switching is less than 40mm, which is implemented as 17.8mm in this application.

[0145] 6. Based on the terminal set by the deviation value: three-phase direct access energy meter D11-D12 corresponds to three-phase transformer access energy meter group 1 D1, group 2 D3; three-phase direct access energy meter D13-D14 corresponds to three-phase transformer access energy meter group 3 D4, group 4 D6; three-phase direct access energy meter D15-D16 corresponds to three-phase transformer access energy meter group 5 D7, group 6 D9; three-phase direct access energy meter D17 corresponds to three-phase transformer access energy meter group 7 D17; three-phase direct access energy meter E11-E12 ... Transformer-connected energy meters are grouped as E1 in group 9 and E3 in group 10; three-phase direct-connected energy meters E13-E14 correspond to three-phase transformer-connected energy meters grouped as E4 in group 11 and E6 in group 12; three-phase direct-connected energy meters E15-E16 correspond to three-phase transformer-connected energy meters grouped as E7 in group 13 and E9 in group 14; and three-phase direct-connected energy meters E17 correspond to three-phase transformer-connected energy meters grouped as E17 in group 15. This allocation ensures that the terminal blocks of three-phase transformer-connected energy meters and three-phase direct-connected energy meters meet the terminal block verification requirements for the deviation value. The initial position of the voltage and current terminals of the meter socket is the "front position." At the same time, the design of terminals in groups 1 to 15 follows the following principles:

[0146] (1) In the state 102 of the three-phase transformer-connected electric energy meter, the terminals of groups 1 to 7 and 9 to 15 are offset 0.9mm to the right of the center of the electric energy meter terminal hole, so that the 6.8mm outer diameter terminal can be smoothly connected to the 6.0mm hole of the electric energy meter terminal and the distance from the left edge of the hole is 0.5mm, and the distance from the left side of the 4mm outer diameter screw is 0.5mm; in this state, the D17 and E17 electric energy terminals are avoided;

[0147] (2) In the 101 state of the three-phase direct-connection electric energy meter, the terminals of groups 1 to 7 and 9 to 15 are aligned with the center of the terminal hole of the electric energy meter, so that the terminal with an outer diameter of 6.8 mm can be smoothly connected to the 7.5 mm hole of the electric energy meter terminal and the distance from the left edge of the hole is 0.35 mm, and the distance from the left side of the 6 mm outer diameter screw is 0.4 mm; in this state, the voltage terminals D2, D5, D8, D10, E2, E5, E8, and E10 are avoided;

[0148] (3) For single-phase electric energy meter in 200 state, the terminals of groups 1 to 4, 7 to 9, and 12 to 15 are offset 0.2mm to the right of the center of the terminal hole of the electric energy meter, so that the terminal with an outer diameter of 6.8mm can be smoothly connected to the 7.5mm hole of the electric energy meter terminal and the distance from the left edge of the hole is 0.7mm, and the distance from the left side of the 4mm outer diameter screw is 0.55mm; in this state, the "D2, D5, D8, D10, E2, E5, E8, E10 voltage terminals" and the D7 current terminal are avoided;

[0149] (4) For single-phase electric energy meter 200, the center distance between group 5 and group 4 is 11.9mm (can be between 10.5mm and 37mm), the center distance between group 6 and group 4 is 34.5mm (can be between 30.9mm and 53.2mm), the center distance between group 10 and group 9 is 28.5mm (can be between 19.5mm and 38.6mm), and the center distance between group 11 and group 12 is 28.5mm (can be between 19.5mm and 38.6mm), to match the design of "the current terminal D7 of group 5 is avoided during connection, and the current terminals D9, E3, and E4 of groups 6, 10, and 11 are not avoided".

[0150] 7. Based on the spacing of the terminal posts set according to the deviation value: single-phase energy meters A01-A02 correspond to three-phase transformer-connected energy meters 1 group D1 and 2 group D3; single-phase energy meters A03-A04 correspond to three-phase transformer-connected energy meters 3 group D4 and 4 group D6; single-phase energy meter B01 corresponds to three-phase transformer-connected energy meters 7 group D17; single-phase energy meters B02-B03 correspond to positioning blocks B02 and B03; single-phase energy meter B04 corresponds to three-phase transformer-connected energy meters The terminal blocks for three-phase transformer-connected energy meters 102 and 200 meet the terminal block verification requirements for deviation values. The initial position of the voltage and current terminals on the meter sockets is the "front position."

[0151] 8. Collect the auxiliary terminal 18 of the three-phase electric energy meter and the auxiliary terminal 19 of the single-phase electric energy meter. The initial position of the auxiliary terminal of the three-phase electric energy meter is the "front position", and the initial position of the auxiliary terminal of the single-phase electric energy meter is the "rear position".

[0152] 9. The assembly line starts to transport pallet 300 to the designated location (pallet 300 is equipped with RFID), and the host computer obtains the corresponding pallet information (single-phase electricity meter 200, three-phase transformer-connected electricity meter 102, and three-phase direct-connected electricity meter 101 information). The electronic control system controls the meter socket for intelligent switching and intelligent avoidance according to the next group of pallet 300 electricity meter information sent by the host computer, and enters the matching verification requirements in advance.

[0153] 10. The default state of the meter socket is the three-phase transformer-connected energy meter 102. When the information of the three-phase transformer-connected energy meter 102 on the tray is received by the electronic control system, the operation is as follows:

[0154] Smart energy meter 104: Position 1 (initial position) indicates the connection of the voltage and current terminals of the three-phase transformer-connected energy meter 2. Terminals D17 (7) and E17 (15) are retracted to the rear, and auxiliary terminals 18 (3-phase energy meter) are extended to the front, completing the connection of smart energy meter 2. After verification and connection exit, the meter socket returns to its initial position.

[0155] IoT Meter 103: Position 1 (initial position) indicates the connection of the voltage and current terminals of the three-phase transformer-connected energy meter 2. Terminals D17 (group 7) and E17 (group 15) are retracted to the rear, and three-phase auxiliary terminals 18 are retracted to the rear, completing the connection of IoT Meter 2. After verification is complete and the connection is terminated, the meter socket returns to its initial position.

[0156] 10. When the information of the three-phase direct-connection electric energy meter 101 carried by the tray 300 is received by the electric control system, the operation is as follows:

[0157] Smart energy meter 104: Variable pitch module 700 switches from position 1 (initial position) to position 2 through variable pitch shifting: Modules in groups 1, 2, 9, and 10 shift right by 1.1 mm; modules in groups 3, 4, 11, and 12 shift right by 2.6 mm; modules in groups 5, 6, 13, and 14 shift right by 4.1 mm; and modules in groups 7 and 15 shift right by 1.2 mm. Voltage terminals D2, D5, D8, D10, E2, E5, E8, and E10 of modules in groups 1 through 7 and 9 through 15 are retracted to the rear position. Three-phase auxiliary terminals 18 extend to the front position, completing the connection of smart energy meter 2. After verification and disconnection, the meter socket returns to its initial position.

[0158] IoT Meter 103: Through variable pitch shifting, variable pitch module 700 switches from position 1 (initial position) to position 2. Modules in groups 1, 2, 9, and 10 shift right by 1.1 mm; modules in groups 3, 4, 11, and 12 shift right by 2.6 mm; modules in groups 5, 6, 13, and 14 shift right by 4.1 mm; and modules in groups 7 and 15 shift right by 1.2 mm. Voltage terminals D2, D5, D8, D10, E2, E5, E8, and E10 of modules in groups 1 to 7 and 9 to 15 are all retracted to the rear end. Three-phase auxiliary terminal 18 retracts to the rear end, completing the connection of smart energy meter 2. After verification and disconnection, the meter socket returns to its initial position.

[0159] 11. When the electronic control system receives the information of the single-phase energy meter 200 on the tray 300, it is necessary to perform intelligent switching. The specific operations are as follows:

[0160] Single-phase smart energy meter 201: Through a single pitch shift, the pitch module 700 switches from position state 1 (initial position) to position state 2. Groups 1, 2, 9, and 10 of the modules shift right by 1.1 mm, groups 3, 4, 11, and 12 of the modules shift right by 2.6 mm, groups 5, 6, 13, and 14 of the modules shift right by 4.1 mm, and groups 7 and 15 of the modules shift right by 1.2 mm. The pitch module 700 then performs a discontinuous secondary pitch shift from position state 2 to position state 3. Group 1 of the modules shifts left by 7.9 mm, group 2 of the modules shifts left by 6.9 mm, group 3 of the modules shifts left by 1.4 mm, group 4 of the modules shifts left by 0.4 mm, group 5 of the modules shifts left by 4 mm, group 6 of the modules shifts left by 4 mm, and group 7 of the modules shifts left by 1. The block is moved right by 16.6mm, the 9th group of modules is moved left by 8.5mm, the 11th group of modules is moved left by 4.5mm, the 12th group of modules is moved right by 4.0mm, the 13th group of modules is moved right by 9.5mm, the 14th group of modules is moved right by 10.5mm, and the 15th group of modules is moved right by 16mm". The voltage terminals D2, D5, D8, D10, E2, E5, E8, and E10 of the 1st to 7th and 9th to 15th groups of modules are all moved to the rear position. The current terminal D7 of the 5th group of modules is moved to the rear position, the single-phase auxiliary terminal 19 is extended to the front position, and the three-phase auxiliary terminal 18 is retracted to the rear position, realizing the connection of the three-position single-phase smart energy meter. After completing the calibration and exiting the connection, the meter socket returns to its initial position.

[0161] Single-phase IoT table 202: Through a single pitch shift, the pitch module 700 switches from position state 1 (initial position) to position state 2. Groups 1, 2, 9, and 10 of the modules shift right by 1.1 mm, groups 3, 4, 11, and 12 of the modules shift right by 2.6 mm, groups 5, 6, 13, and 14 of the modules shift right by 4.1 mm, and groups 7 and 15 of the modules shift right by 1.2 mm. The pitch module 700 then performs a discontinuous secondary pitch shift from position state 2 to position state 3. Group 1 of the modules shifts left by 7.9 mm, group 2 of the modules shifts left by 6.9 mm, group 3 of the modules shifts left by 1.4 mm, group 4 of the modules shifts left by 0.4 mm, group 5 of the modules shifts left by 4 mm, group 6 of the modules shifts left by 4 mm, and group 7 of the modules shifts left by 1. The module group 9 moves 16.6mm to the right, the module group 9 moves 8.5mm to the left, the module group 11 moves 4.5mm to the left, the module group 12 moves 4.0mm to the right, the module group 13 moves 9.5mm to the right, the module group 14 moves 10.5mm to the right, and the module group 15 moves 16mm to the right. The voltage terminals D2, D5, D8, D10, E2, E5, E8, and E10 of the modules groups 1 to 7 and 9 to 15 are all moved to the rear position; the current terminal D7 of the module group 5 is moved to the rear position, the single-phase auxiliary terminal 19 is retracted to the rear position, and the three-phase auxiliary terminal 18 is retracted to the rear position, realizing the connection of the three-meter position of the single-phase smart electricity meter. After completing the calibration and exiting the connection, the meter socket returns to its initial position.

[0162] 12. After the calibration of the calibration line is completed, the meter socket will be restored to the default initial position.

[0163] For further information, please refer to the following example:

[0164] Figure 4a As shown: 1~7 groups, 9~15 groups of modules, the voltage column 600 can move forward and backward, extending when in use and retreating when not in use, forming an intelligent avoidance, which does not affect the connection between other terminals and the energy meter. The current column 400 does not actively extend and retract forward and backward, but passively retracts and retracts when connected. 1~7 groups, 9~15 groups of modules can move left and right to achieve automatic distance adjustment of the position of each group of terminals of the three-phase transformer-connected energy meter. In short, Figure 4a As shown in the table position diagram of single-phase electricity meter 3, the current terminals B02 and B03 of single-phase electricity meter B are used as the reference. The distance between the terminals is adjusted to correspond to the terminal position of the electricity meter, and the terminals that are not needed are avoided. Figure 4a The sequence of position states 1, 2, and 3 of the pitch-variable module 700 shown is an example, and protection is not limited to implementation in a changed sequence;

[0165] The assembly line starts transporting pallet 300 to the designated location (pallet equipped with RFID), and the host computer obtains the corresponding pallet information (single-phase electricity meter 200, three-phase transformer-connected electricity meter 102, and three-phase direct-connected electricity meter 101). The electronic control system controls the meter sockets to perform intelligent switching and intelligent avoidance according to the information sent by the host computer. When the electronic control system receives the instructions for the single-phase and three-phase electricity meter information carried on pallet 300, the operation is as follows: The specific actions are as follows (all described by the distance change from the initial position to other positions):

[0166] 1. Three-phase transformer-connected smart energy meter: Position 1 (initial position) indicates the connection of the voltage and current terminals of the three-phase transformer-connected energy meter at position 2. Terminals D17 in group 7 and E17 in group 15 are moved to the rear, and auxiliary terminal 18 of the three-phase energy meter is extended to the front, completing the connection of the smart energy meter at position 2. After verification is completed and the connection is terminated, the meter socket returns to its initial position.

[0167] 2. Three-phase transformer-connected IoT meter: Position 1 (initial position) indicates the connection of the voltage and current terminals of the three-phase transformer-connected energy meter 2. Terminals D17 (group 7) and E17 (group 15) are retracted to the rear, and three-phase auxiliary terminal 18 is retracted to the rear, completing the connection of IoT meter 2. After verification is completed and the connection is terminated, the meter socket returns to its initial position.

[0168] 3. Three-phase direct-access smart energy meter: Variable pitch module 700 switches from position 1 (initial position) to position 2 through variable pitch shifting: Modules in groups 1, 2, 9, and 10 shift right by 1.1 mm; modules in groups 3, 4, 11, and 12 shift right by 2.6 mm; modules in groups 5, 6, 13, and 14 shift right by 4.1 mm; and modules in groups 7 and 15 shift right by 1.2 mm. Voltage terminals D2, D5, D8, D10, E2, E5, E8, and E10 of modules in groups 1 to 7 and 9 to 15 are moved to the rear end. Three-phase auxiliary terminal 18 extends to the front end, completing the connection of smart energy meter 2. After verification and disconnection, the meter socket returns to its initial position.

[0169] 4. Three-phase direct-access IoT meter: Through variable-pitch shifting, variable-pitch module 700 switches from position 1 (initial position) to position 2. Modules in groups 1, 2, 9, and 10 shift right by 1.1 mm; modules in groups 3, 4, 11, and 12 shift right by 2.6 mm; modules in groups 5, 6, 13, and 14 shift right by 4.1 mm; and modules in groups 7 and 15 shift right by 1.2 mm. Voltage terminals D2, D5, D8, D10, E2, E5, E8, and E10 of modules in groups 1 to 7 and 9 to 15 are retracted to the rear end. Three-phase auxiliary terminal 18 retracts to the rear end, completing the connection of smart energy meter 2. After verification and connection are complete, the meter socket returns to its initial position.

[0170] 5. Single-phase smart energy meter 201: Through a single pitch shift, the pitch module 700 switches from position state 1 (initial position) to position state 2. Groups 1, 2, 9, and 10 of the modules shift right by 1.1 mm, groups 3, 4, 11, and 12 of the modules shift right by 2.6 mm, groups 5, 6, 13, and 14 of the modules shift right by 4.1 mm, and groups 7 and 15 of the modules shift right by 1.2 mm. The pitch module 700 then performs a discontinuous secondary pitch shift from position state 2 to position state 3. Group 1 of the modules shifts left by 7.9 mm, group 2 of the modules shifts left by 6.9 mm, group 3 of the modules shifts left by 1.4 mm, group 4 of the modules shifts left by 0.4 mm, group 5 of the modules shifts left by 4 mm, and group 6 of the modules shift left by 1. Shift left by 4mm; Group 7 modules shift right by 16.6mm; Group 9 modules shift left by 8.5mm; Group 11 modules shift left by 4.5mm; Group 12 modules shift right by 4.0mm; Group 13 modules shift right by 9.5mm; Group 14 modules shift right by 10.5mm; Group 15 modules shift right by 16mm." The voltage terminals D2, D5, D8, D10, E2, E5, E8, and E10 of modules in groups 1 to 7 and 9 to 15 are all moved to the rear end; the current terminal D7 of module group 5 is moved to the rear end, and the single-phase auxiliary terminal 19 is extended to the front end, realizing the connection of the single-phase smart energy meter with three meter positions. After completing the calibration and exiting the connection, the meter socket returns to its initial position.

[0171] 6. Single-phase IoT table 202: Through a single pitch shift, the pitch module 700 switches from position state 1 (initial position) to position state 2. Groups 1, 2, 9, and 10 of the modules move right by 1.1 mm, groups 3, 4, 11, and 12 of the modules move right by 2.6 mm, groups 5, 6, 13, and 14 of the modules move right by 4.1 mm, and groups 7 and 15 of the modules move right by 1.2 mm. The pitch module 700 then performs a discontinuous secondary pitch shift from position state 2 to position state 3. Group 1 of the modules moves left by 7.9 mm, group 2 of the modules moves left by 6.9 mm, group 3 of the modules moves left by 1.4 mm, group 4 of the modules moves left by 0.4 mm, group 5 of the modules moves left by 4 mm, and group 6 of the modules moves left by 1. The voltage terminals D2, D5, D8, D10, E2, E5, E8, and E10 of modules in groups 1 to 7 and 9 to 15 are all moved to the rear end; the current terminal D7 of module group 5 is moved to the rear end, and the single-phase auxiliary terminal 19 is retracted to the rear end, realizing the connection of the single-phase smart energy meter 3. After completing the calibration and exiting the connection, the meter socket returns to its original position.

[0172] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, within the scope of the present invention are included in the patent protection scope of the present invention.

Claims

1. A verification device, characterized in that: The verification device has a first verification state for verifying a three-phase transformer-connected electric energy meter, a second verification state for verifying a three-phase direct-connected electric energy meter, and a third verification state for verifying a single-phase electric energy meter. The verification device includes: base; A plurality of current columns are respectively connected to the base, each of the current columns extends along a first direction, and each of the current columns is arranged along a second direction intersecting the first direction; in the first calibration state, each of the current columns at least jointly forms a first calibration group and a second calibration group arranged along the second direction, and the first calibration group and the second calibration group are used to calibrate the two three-phase transformer-connected electric energy meters; in the second calibration state, each of the current columns at least jointly forms a third calibration group and a fourth calibration group arranged in sequence along the second direction, and the third calibration group and the fourth calibration group are used to calibrate the two three-phase direct-connected electric energy meters; in the third calibration state, each of the current columns at least jointly forms a fifth calibration group, a sixth calibration group and a seventh calibration group arranged in sequence along the second direction, and the fifth calibration group, the sixth calibration group and the seventh calibration group are used to calibrate the three single-phase electric energy meters; Wherein, the first calibration group and the second calibration group both include a first phase calibration column group, a second phase calibration column group, a third phase calibration column group and a neutral line calibration column group, and one of the first phase calibration column group, the second phase calibration column group and the third phase calibration column group includes a current input calibration column module and a current output calibration column, and the current input calibration column module and the current output calibration column are configured to be able to approach or move away from each other along the second direction, and the current input calibration column module includes a current input calibration column and a voltage input calibration column. The neutral line calibration column group includes a three-phase transformer-connected electric energy meter neutral line voltage input calibration column and a three-phase direct-connected electric energy meter neutral line voltage input calibration column, and the three-phase direct-connected electric energy meter neutral line voltage input calibration column is compatible with the current input calibration column of the second meter position single-phase electric energy meter.

2. The testing device according to claim 1, wherein: The calibration device includes a tray, which is used to carry three of the single-phase electricity meters or two of the three-phase electricity meters. The calibration device includes a positioning block centrally arranged along the second direction, and the positioning block has two through holes passing through along the first direction. When the first state is switched to the second and third states, the current terminals passing through the through holes in the three states are still passed through the through holes to position the three-phase electricity meters and the single-phase electricity meters.

3. The testing device according to claim 1, wherein: The verification device includes a first drive assembly connected to the base. The first driving component is configured to drive at least one of the current input verification column module and the current output verification column in the first phase verification column group to move closer to or away from the other along the second direction; and / or, The first driving component is configured to drive at least one of the current input verification column module and the current output verification column in the second phase verification column group to move closer to or away from the other along the second direction; and / or, The first driving component is configured to drive at least one of the current input verification column module and the current output verification column in the third phase verification column group to move closer to or away from the other along the second direction; The first driving assembly is configured to drive the zero line verification column group to move leftward and rightward along the second direction.

4. The testing device according to claim 3, wherein: The first and second driving assemblies include first and second driving cylinders and a driving plate, wherein the first and second driving cylinders are connected to the base, and the driving plate is connected to the first driving cylinder, and the first and second driving cylinders are configured to drive the driving plate to move along the first direction; The driving plate includes a plurality of driving holes, each of which extends obliquely relative to the first direction, and each of which is arranged along the second direction. Each of the current verification column modules includes a detection end and a driving end. The detection end is used to insert the single-phase electric energy meter or the three-phase electric energy meter. The driving end is provided with a driving protrusion, and each of the driving protrusions extends into each of the driving holes one by one, so that when the driving plate moves horizontally along the first direction, the corresponding current column is driven to move horizontally along the second direction.

5. The testing device according to claim 4, characterized in that: The driving hole includes a first hole segment and a second hole segment that are connected to each other, and the first hole segment is located on a side of the second hole segment close to the detection end; The first driving cylinder is configured to drive the driving plate to move from the first position to the second position along the first direction, so that the driving protrusion moves from the end of the first hole segment away from the second hole segment relative to the driving plate to the end close to the second hole segment; the second driving assembly also includes a second driving cylinder, the second driving cylinder is connected to the base, and the second driving cylinder is configured to drive the driving plate to move from the second position to the third position along the first direction, so that each driving protrusion moves from the end of the first hole segment close to the second hole segment relative to the driving plate to the end of the second hole segment away from the first hole segment.

6. The testing device according to claim 5, characterized in that: Along the first direction, the driving hole includes a first hole segment and a second hole segment, and the first hole segment and the second hole segment have different inclination angles; Each of the first hole segments extends along the first direction of the detection end, and is used to accommodate the reciprocating movement of each of the driving protrusions from the first position to the second position; each of the second hole segments extends along the first direction of the driving end, and is used to accommodate the reciprocating movement of each of the driving protrusions from the second position to the third position; The first and eighth driving holes on the driving plate from left to right are used to accommodate the driving protrusions of the current input verification column modules in the first phase verification column group of the two three-phase transformer-connected electric energy meters; the second and ninth driving holes on the driving plate from left to right are used to accommodate the driving protrusions of the current output verification column modules in the first phase verification column group of the two three-phase transformer-connected electric energy meters; The third and tenth driving holes from left to right on the driving plate are used to accommodate the driving protrusions of the current input verification column modules in the second phase verification column group of the two three-phase transformer-connected electric energy meters; the fourth and eleventh driving holes from left to right on the driving plate are used to accommodate the driving protrusions of the current output verification column modules in the second phase verification column group of the two three-phase transformer-connected electric energy meters; The fifth and twelfth driving holes from left to right on the driving plate are used to accommodate the driving protrusions of the current input verification column modules in the third phase verification column group of the two three-phase transformer-connected electric energy meters; the sixth and thirteenth driving holes from left to right on the driving plate are used to accommodate the driving protrusions of the current output verification column modules in the third phase verification column group of the two three-phase transformer-connected electric energy meters; The seventh and fourteenth driving holes from left to right on the driving plate are used to accommodate the driving protrusions of the two three-phase transformer-connected electric energy meter zero line verification column groups.

7. The testing device according to claim 6, characterized in that: When the first state is switched to the second state, the first driving component drives the current input verification column module and the current output verification column to move along the second direction; in: The two three-phase transformer-connected electric energy meters are positioned at the current input verification column module and the current output verification column in the first phase verification column group and move a first distance along the second direction; The two three-phase transformer-connected electric energy meters are positioned at the second phase verification column group, the current input verification column module and the current output verification column are moved a second distance along the second direction; The two three-phase transformer-connected electric energy meters are positioned at the third phase verification column group, the current input verification column module and the current output verification column are moved a third distance along the second direction; The two three-phase transformer-connected electric energy meters are positioned at the neutral line verification column group and moved a fourth distance along the second direction; When the second state is discontinuously switched to the third state, the first driving component drives the current input verification column module and the current output verification column to move along the second direction; in, The first three-phase transformer-connected electric energy meter is positioned so that the current input verification column module in the first phase verification column group moves a fifth distance along the second direction, and the current output verification column moves a sixth distance along the second direction; The first three-phase transformer-connected electric energy meter is positioned at the second phase verification column group, the current input verification column module is moved a seventh distance along the second direction, and the current output verification column is moved an eighth distance along the second direction; The first three-phase transformer-connected electric energy meter is positioned so that the current input verification column module in the third-phase verification column group moves a ninth distance along the second direction, and the current output verification column moves a tenth distance along the second direction; The first three-phase transformer-connected electric energy meter is positioned at the neutral line verification column and moved an eleventh distance along the second direction; The second three-phase transformer-connected electric energy meter is positioned at the current input verification column module in the first phase verification column group, and the current output verification column is moved a twelfth distance along the second direction, and a thirteenth distance along the second direction; The second three-phase transformer-connected electric energy meter is positioned at the second phase verification column group, wherein the current input verification column module is moved a fourteenth distance along the second direction, and the current output verification column is moved a fifteenth distance along the second direction; The second three-phase transformer-connected electric energy meter is positioned so that the current input verification column module in the third-phase verification column group moves a sixteenth distance along the second direction, and the current output verification column moves a seventeenth distance along the second direction; The second three-phase transformer-connected electric energy meter is positioned at the neutral line verification column and moves an eighteenth distance along the second direction.

8. The testing device according to claim 1, wherein: The first verification group and the second verification group are both configured to be suitable for verifying the three-phase transformer-connected electric energy meter; and / or, The third verification group and the fourth verification group are both configured to be suitable for verifying a three-phase direct-connection electric energy meter; and / or, The fifth calibration group, the sixth calibration group and the seventh calibration group are all configured to be suitable for calibrating single-phase electric energy meters.

9. The testing device according to claim 1, wherein: The verification device is in the first verification state, which defaults to the verification state of the two three-phase transformer-connected electric meters; The first and second driving assemblies include first and second driving cylinders and a driving plate, wherein the first and second driving cylinders are connected to the base, and the driving plate is connected to the first driving cylinder, and the first and second driving cylinders are configured to drive the driving plate to move along the first direction; The third driving assembly includes a third driving cylinder and a driving plate, wherein the third driving cylinder is connected to the base, the driving plate is connected to the third driving cylinder, and the third driving cylinder is configured to drive the driving plate to move along the first direction; The fourth driving assembly includes a fourth driving cylinder and a driving plate, wherein the fourth driving cylinder is connected to the base, the driving plate is connected to the fourth driving cylinder, and the fourth driving cylinder is configured to drive the driving plate to move along the first direction; The fifth driving assembly includes a fifth driving cylinder and a driving plate, wherein the fifth driving cylinder is connected to the base, the driving plate is connected to the fifth driving cylinder, and the fifth driving cylinder is configured to drive the driving plate to move along the first direction; The third driving component intelligently avoids the zero-line voltage input of the three-phase direct-connection electric energy meter of the two zero-line verification column groups to the verification columns, so that the current columns form the first verification group and the second verification group relative to the base; The calibration device further includes a first drive component, which is connected to the base; the first drive component is configured to drive the current calibration columns of the third calibration group and the fourth calibration group, so that the driven current calibration columns move relative to the base along the second direction, and the fourth drive component intelligently avoids the voltage input calibration columns of the first to third phase current input calibration column modules of the two three-phase transformer-connected electric energy meters and the zero-line voltage input calibration columns of the two zero-line calibration column groups, together forming the third calibration group and the fourth calibration group; The calibration device further comprises a first drive assembly, the first drive assembly being connected to the base; the first drive assembly being configured to drive the current calibration columns of the third calibration group and the fourth calibration group, so that the driven current calibration columns move relative to the base along the second direction to form the third calibration group and the fourth calibration group; the calibration device further comprises a second drive assembly, the second drive assembly being connected to the base; the second drive assembly being configured to drive the current calibration columns of the fifth calibration group, the sixth calibration group, and the seventh calibration group, so that the driven current calibration columns move relative to the base along the second direction to form the fifth calibration group, the sixth calibration group, and the seventh calibration group together; the second drive assembly being configured to drive the first phase and second phase calibration column groups in the first calibration group so that the driven current calibration columns move relative to the base along the second direction to form the fifth calibration group together with the fifth calibration group; and / or the second drive assembly being configured to drive "the first The zero-line voltage input calibration column of the three-phase direct-access electric energy meter in the calibration group, the current input calibration column module of the first phase calibration column group in the second calibration group, and the two current terminals of the positioning block together constitute the sixth calibration group; and / or, the second driving component is configured to drive "the current output calibration column of the second phase calibration column group of the second calibration group, the third phase calibration column group of the second calibration group, the three-phase calibration column group of the zero-line calibration column group of the second calibration group The direct-access type electric energy meter zero-line voltage input verification column" together constitutes the seventh verification group; at the same time: the fourth driving component intelligently avoids the voltage input verification columns of the first to third phase current input verification column modules of the two first verification groups and the second verification group and the three-phase transformer-accessed electric energy meter zero-line voltage input verification columns of the two zero-line verification column groups, and the fifth driving component intelligently avoids the current input verification column of the current input verification column module of the third phase verification column group of the first verification group.

10. The testing device according to claim 1, wherein: The testing device further includes a first auxiliary probe group and a second auxiliary probe group, wherein the first auxiliary probe group and the second auxiliary probe group are both movably connected to the base, the first auxiliary probe group includes a plurality of first probes arranged along the second direction, and the second auxiliary probe group includes a plurality of second probes arranged along the second direction; In the first calibration state, the first auxiliary probe set slides relative to the base along the first direction to a first calibration position for calibrating the two three-phase transformer-connected electric energy meters, and the second auxiliary probe set slides relative to the base along the first direction to a second non-calibration position; In the second testing state, the first auxiliary probe set slides relative to the base along the first direction to a first testing position for testing the two three-phase direct-connection electric energy meters, and the second auxiliary probe set slides relative to the base along the first direction to a second non-testing position; In the third testing state, the second auxiliary probe set slides relative to the base along the first direction to a second testing position for testing the three single-phase electricity meters, and the first auxiliary probe set slides relative to the base along the first direction to a first non-testing position.

11. A verification method, characterized in that: For the verification device according to any one of claims 1 to 10, the verification method comprises: Driving multiple verification groups to verify multiple single-phase electric energy meters one by one; wherein each of the verification groups includes multiple current columns, each of the current columns extends along a first direction, and each of the current columns is arranged along a second direction intersecting the first direction; driving at least one of the current columns in one of the test groups to move along the second direction until it merges with another test group; Driving the current input verification column and the current output verification column in at least one verification group to move closer to or farther from each other along a second direction to adapt to the three-phase electric energy meter; The calibration group after driving the adaptation of the three-phase electric energy meter calibrates the three-phase electric energy meter; wherein, the three-phase electric energy meter includes a three-phase direct-access electric energy meter and a three-phase transformer-access electric energy meter, and the number of the three-phase electric energy meters is less than the number of the single-phase electric energy meters.

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