Single-board detection tool for three-phase electric energy meter

Abstract

The utility model discloses a single board detection tool for a three-phase electric energy meter, which comprises a control box base, and a support conveying structure and a detection structure which are arranged on the control box base, and is characterized in that the support conveying structure is arranged on the control box base and is used for placing a PCBA (Printed Circuit Board Assembly) board and driving the PCBA board to enter the detection structure; the detection structure is used for carrying out power connection detection on a terminal structure on the internal PCBA board; the supporting and conveying structure comprises a base, a limiting support located on the base, a linear motor embedded in the base and a push plate located above the base, the detection structure comprises a detection frame body and a strip-shaped needle bed plate located on the inner side of the detection frame body, and a test probe is arranged on the strip-shaped needle bed plate and used for detecting PCBA board terminals in a contact mode. According to the utility model, the PCBA board can be mechanically or semi-automatically loaded and conveyed to the detection structure and automatically detected, the detection operation of the PCBA board of the three-phase electric energy meter can be automatically completed, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of single board detection, in particular to a single board detection tooling for a three-phase electric energy meter. Background Art

[0002] In the existing manufacturing process of smart meters, the core components are usually assembled printed circuit boards (PCBA) containing electronic components after welding. The production and testing efficiency is an important factor affecting the production efficiency of smart meters.

[0003] The existing PCBA installation method generally uses mechanical tooling for testing. The soldered PCB is placed on the tooling structure, and the board is pressed down by hand. The board is automatically tested with the help of an internal controller. Although this method is more efficient than manual testing, it requires a lot of physical strength to press the board by hand and is not suitable for mass production.

[0004] More specifically, in the specific circuit structure of the three-phase energy meter, the voltage measurement circuit is directly connected to the MCU circuit after passing through the resistor voltage divider circuit, and the measurement is mainly performed through the terminals for the access of the three-phase detection current. Therefore, the traditional PCBA single board circuit detection method is generally not suitable for the special case of the three-phase energy meter.

[0005] To this end, the present application specifically proposes a single-board detection tooling for a three-phase electric energy meter to solve the above technical problems. Utility Model Content

[0006] The main purpose of the utility model is to provide a single board detection tool for a three-phase electric energy meter, which can automatically detect the PCBA single board of the three-phase electric energy meter.

[0007] In order to solve the above technical problems, the utility model provides a single board detection tool for a three-phase electric energy meter, including a control box base and a racking structure and a detection structure installed on the control box base, wherein:

[0008] The rack-and-carry structure is installed on one side of the upper surface of the control box base, and is used to place the PCBA board and drive the PCBA board into the detection structure;

[0009] The detection structure is used to perform electrical detection on the terminal structure on the internal PCBA board.

[0010] Furthermore, the conveying structure includes a base mounted on the control box base, a limit bracket located on the base, a linear motor embedded in the base and a push plate located above the base, wherein:

[0011] Limit bracket, used for the clamping and limiting placement of PCBA board;

[0012] A linear motor is used to drive the push plate to move closer to or away from the detection structure;

[0013] When the push plate approaches the detection structure, the push plate contacts and pushes the PCBA board on the limit bracket into the detection structure.

[0014] Further, the detection structure comprises a detection box body mounted on a control box base, wherein:

[0015] A cavity is arranged inside the detection box, and openings communicating with the cavity are provided at two opposite sides of the detection box, and one group of the openings faces the racking and conveying structure.

[0016] Furthermore, the detection structure also includes two groups of rubber wheels that are rotatably embedded in the bottom of the cavity and arranged in parallel, a lifting plate that slides above the cavity in the vertical direction, a lifting control component for controlling the movement of the lifting plate in the vertical direction, a limiting sliding component for limiting the movement of the lifting plate in the vertical direction in the cavity, multiple groups of lifting springs arranged above the lifting plate and connected to the upper wall of the cavity, a detection frame installed at the bottom of the lifting plate through an elastic connector, and three groups of strip needle bed plates located inside the detection frame and arranged in parallel, each of the three groups of strip needle bed plates is provided with at least two groups of symmetrically arranged test probes, and the test probes are used to contact and detect PCBA board terminals.

[0017] Furthermore, the rubber wheels are rotatably embedded in the bottom of the cavity through rotating shafts on both sides, and the rotating shafts on the same side of adjacent rubber wheels are connected through synchronous pulleys.

[0018] Further, the lifting control assembly includes a meshing gear assembly installed on the inner wall of the cavity and connected to the rotating shaft, a rotating rod rotating above the cavity and arranged parallel to the rotating shaft, and a plurality of groups of protrusions arranged on the rotating rod;

[0019] The meshing gear assembly is connected to the rotating rod to drive the rotating rod to rotate when the rotating shaft rotates;

[0020] When the rotating rod is in a rotating state, the protrusion contacts and pushes the lifting plate to move downward.

[0021] Furthermore, a slide rail structure with a fixed distance structure is provided inside the detection frame, and the three groups of strip-shaped needle bed plates are controlled by the slide rail structure to slide and position inside the detection frame.

[0022] Furthermore, the elastic connector includes a sleeve, a sliding piston sliding in the sleeve, a sliding rod arranged on one side of the sliding piston and sliding out of the sleeve, an extrusion spring arranged on the other side of the sliding piston, and a through hole opened on the end of the sleeve away from the sliding rod.

[0023] Furthermore, the detection box is also provided with an indicator light, the single board detection tooling is also provided with a power module, the single board detection tooling is also provided with a level detection circuit, a light driving circuit and a control driving circuit, wherein:

[0024] Control drive circuit, used to control the operation of electrical components of the drive device;

[0025] A level detection circuit is connected to the power module and the three groups of test probes of the strip-shaped needle bed boards, and is used to detect whether a fault occurs in the three-phase circuit of the PCBA board when the test probes are in contact with the terminals of the PCBA board;

[0026] The light driving circuit is connected to the level detection circuit and the indicator light, and is used to control the indicator light to emit different light signals according to the detection results of the terminal status of the PCBA board.

[0027] Furthermore, the single board inspection tooling also includes a movable claw structure for picking up, loading, unloading and classifying and placing the PCBA board.

[0028] The beneficial effects of the utility model are embodied in:

[0029] 1. The utility model places the PCBA board on the rack-transporting structure and uses the rack-transporting structure to automatically transport it to the detection structure. It can adopt a mechanized or semi-automatic loading method to ensure that the PCBA can be placed in the detection tooling quickly and smoothly, significantly reducing the dependence on the operator's physical strength, and is suitable for large-scale production environments.

[0030] 2. The utility model delivers the PCBA board into the detection structure through the rack-delivery structure, and can use the lifting plate on the detection structure to press down, so that the test probes on the strip needle bed plate can contact and connect with the PCBA board terminals, thereby ensuring a comprehensive and true test of the voltage measurement circuit and current detection function, improving the intelligence level of the three-phase electric energy meter PCBA board detection, and enhancing its fault detection and processing capabilities in a complex production environment, providing strong support for improving the overall quality and production efficiency of smart meter manufacturing.

[0031] 3. The utility model automatically controls the PCBA board to enter the detection structure through the rack-feeding structure, and performs three-phase circuit detection on the PCBA board through the detection structure, which can automatically and efficiently complete the detection operation of the three-phase electric energy meter PCBA board and ensure its detection quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0033] Figure 1 It is an overall three-dimensional view of the utility model;

[0034] Figure 2 It is a cross-sectional stereoscopic schematic diagram of the detection structure of the utility model;

[0035] Figure 3 A three-dimensional diagram of the internal structure of the detection box of the utility model Figure 1 ;

[0036] Figure 4 A three-dimensional diagram of the internal structure of the detection box of the utility model Figure 2 ;

[0037] Figure 5 It is a cross-sectional stereoscopic schematic diagram of the elastic connecting piece of the utility model.

[0038] In the figure:

[0039] 1. Control box base;

[0040] 2. Rack-feeding structure; 21. Base; 22. Limiting bracket; 23. Linear motor; 24. Push plate;

[0041] 3. Detection structure; 31. Detection box; 311. Opening; 312. Cavity; 313. Indicator light; 32. Rubber wheel; 321. Rotating shaft; 322. Synchronous pulley; 33. Lifting control assembly; 331. Meshing gear assembly; 332. Rotating rod; 333. Bump; 34. Lifting plate; 35. Limit sliding assembly; 36. Lifting spring; 37. Elastic connector; 371. Sleeve; 372. Sliding rod; 373. Sliding piston; 374. Extrusion spring; 375. Through hole; 38. Detection frame; 39. Strip needle bed plate. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0043] In the embodiment, see Figures 1 to 5 .

[0044] like Figure 1 and Figure 2The utility model provides a single board detection tool for a three-phase electric energy meter, including a control box base 1 and a racking structure 2 and a detection structure 3 installed on the control box base 1. The racking structure 2 automatically controls the PCBA board to enter the detection structure 3, and the detection structure 3 performs a three-phase circuit detection on the PCBA board, which can automatically and efficiently complete the detection operation of the PCBA board of the three-phase electric energy meter and ensure its detection quality, wherein:

[0045] The conveying structure 2 is installed on one side of the upper surface of the control box base 1, and is used for placing the PCBA board and driving the PCBA board into the detection structure 3;

[0046] The detection structure 3 is used to perform electrical connection detection on the terminal structure on the internal PCBA board.

[0047] This tooling structure significantly improves the production and testing efficiency of three-phase electric energy meter PCBA, reduces labor costs, and enhances product quality control capabilities.

[0048] Specifically, the rack-transporting structure 2 includes a base 21 mounted on the control box base 1, a limit bracket 22 located on the base 21, a linear motor 23 embedded in the base 21, and a push plate 24 located above the base 21, wherein:

[0049] The limiting bracket 22 is used for the clamping and limiting placement of the PCBA board;

[0050] The linear motor 23 is used to drive the push plate 24 to move closer to or away from the detection structure 3. Since the linear motor 23 adopts an embedded structure and is directly embedded in the base 21, the overall structure of the rack and conveyor structure 2 can be kept compact, which reduces the occupied space and helps optimize the overall tooling layout. At the same time, the simple structural design facilitates maintenance and cleaning, reducing the difficulty of the operator's work;

[0051] When the push plate 24 approaches the detection structure 3, the push plate 24 contacts and pushes the PCBA board on the limit bracket 22 into the detection structure 3. At this time, the design of the push plate 24 takes into account the buffer mechanism when contacting the PCBA board. Soft materials or elastic elements may be used to push the PCBA board with a soft and uniform force to prevent deformation of the board or falling off of components caused by hard contact.

[0052] By placing the PCBA board on the rack-conveyor structure 2 and automatically conveying it to the detection structure 3 through the rack-conveyor structure 2, the traditional method of manually pressing the single board can be abandoned, and a mechanized or semi-automatic loading system can be adopted to ensure that the PCBA can be placed in the detection tooling quickly and smoothly, significantly reducing the dependence on the operator's physical strength, and is suitable for large-scale production environments.

[0053] Furthermore, the limiting bracket 22 of the conveying structure 2 can provide a precise locking limiting space for the PCBA board, ensuring that the board maintains a correct posture during the conveying process, preventing displacement or flipping, and ensuring that it accurately enters the detection structure 3, thereby improving the reliability and consistency of the detection. The linear motor 23 can provide precise position and speed control to ensure that the movement of the push plate 24 is smooth and stable, avoiding damage to the PCBA board and its electronic components due to impact or vibration, and ensuring product quality. Therefore, the linear motor 23 is used to drive the push plate 24 to move, replacing manual operation, thereby realizing automatic transportation of the PCBA board from the conveying structure 2 to the detection structure 3, significantly improving work efficiency, reducing manual intervention, and facilitating continuous operation and capacity improvement in large-scale production environments.

[0054] It should be noted that the limit bracket 22 can be adjusted or replaced according to PCBA boards of different models or specifications to ensure the compatibility of the rack and conveying structure 2 with various board types and adapt to the diversified needs of the product line. At the same time, the stroke, thrust and other parameters of the linear motor 23 are also adjustable and can be flexibly set according to specific production process requirements to adapt to different board thicknesses, weights or pushing speed requirements.

[0055] Specifically, the detection structure 3 includes a detection box 31 installed on the control box base 1, wherein: a cavity 312 is arranged inside the detection box 31, and openings 311 connecting the cavity 312 are opened on two opposite sides of the detection box 31, and one group of openings 311 faces the rack structure 2.

[0056] During the specific implementation process, the support height of the PCBA board on the limiting bracket 22 is slightly higher than or flush with the bottom height of the opening 311, which is used to facilitate the rack-feeding structure 2 to feed the PCBA board into the cavity 312 through the opening 311. The detection element inside the cavity 312 can complete the three-phase circuit detection operation of the PCBA board.

[0057] In a specific embodiment, if Figure 3 and Figure 4 As shown, the detection structure 3 also includes two groups of rubber wheels 32 rotatably embedded in the bottom of the cavity 312 and arranged in parallel, a lifting plate 34 sliding in the vertical direction above the cavity 312, a lifting control component 33 for controlling the vertical movement of the lifting plate 34, a limiting sliding component 35 for limiting the vertical movement of the lifting plate 34 in the cavity 312, a plurality of lifting springs 36 arranged above the lifting plate 34 and connected to the upper wall of the cavity 312, a detection frame 38 installed at the bottom of the lifting plate 34 through an elastic connector 37, and three groups of strip needle bed plates 39 located on the inner side of the detection frame 38 and arranged in parallel, and at least two groups of symmetrically arranged test probes are arranged on the three groups of strip needle bed plates 39, and the test probes are used to contact and detect the terminals of the PCBA board.

[0058] The elastic connecting member 37 is as follows: Figure 5 As shown, it includes a sleeve 371, a sliding piston 373 sliding in the sleeve 371, a sliding rod 372 arranged on one side of the sliding piston 373 and sliding out of the sleeve 371, an extrusion spring 374 arranged on the other side of the sliding piston 373 and a through hole 375 opened on the end of the sleeve 371 away from the sliding rod 372, which can be used to ensure that the test probe has a certain buffer when contacting the PCBA board, which can not only ensure stable electrical contact, but also prevent excessive force from damaging the terminal or probe.

[0059] The multiple groups of lifting springs 36 here are used to provide a constant upward tightening pressure for the lifting plate 34, so as to ensure that the lifting control assembly 33 can stably control the lifting plate 34 to move up and down in the vertical direction.

[0060] The limiting sliding assembly 35 here consists of a sliding block and a sliding groove for limiting the sliding block, which is used to ensure that the lifting plate 34 slides smoothly and accurately in the vertical direction in the cavity 312, prevents deviation during the lifting process, and ensures accurate alignment of the probe and the terminal.

[0061] It should also be noted that a slide rail structure with a fixed-distance structure is provided on the inner side of the detection frame 38, and the three groups of strip needle bed plates 39 are controlled by the slide rail structure to slide and position on the inner side of the detection frame 38. Therefore, the three groups of strip needle bed plates 39 are controlled by the slide rail structure to adjust their positions, which can further allow the test probes to be accurately arranged according to the layout of the PCBA board terminals, and then can contact the terminals one by one, thereby ensuring the comprehensiveness and accuracy of the detection. At the same time, since the test probes are symmetrically arranged on the strip needle bed plates 39, when the rectangular PCBA board is actually sent into the cavity 312, it can be ensured that when the PCBA board is sent into the cavity 312 in the reverse rotation posture, the test probes on the three groups of strip needle bed plates 39 can still be used to contact and detect the PCBA board terminals.

[0062] Furthermore, the rubber wheels 32 are rotatably embedded in the bottom of the cavity 312 via the rotating shafts 321 on both sides, and the rotating shafts 321 on the same side of adjacent rubber wheels 32 are connected via a synchronous pulley 322 .

[0063] Therefore, when the PCBA board enters the cavity 312 of the detection structure 3, the rubber wheel 32 can provide synchronous rolling support, reduce the friction between the board surface and the hard structure, protect the board from scratches, and ensure that the board remains horizontal and stable during the detection process.

[0064] Furthermore, the lifting control component 33 realizes automatic docking and separation between the probe and the PCBA board terminal by controlling the movement of the lifting plate 34 in the vertical direction, thereby avoiding position deviation and uneven force caused by manual operation and improving the consistency and reliability of detection. The lifting control component 33 includes a meshing gear assembly 331 installed on the inner wall of the cavity 312 and connected to the rotating shaft 321, a rotating rod 332 rotating above the cavity 312 and parallel to the rotating shaft 321, and a plurality of groups of protrusions 333 arranged on the rotating rod 332.

[0065] The meshing gear assembly 331 is connected to the rotating rod 332 to drive the rotating rod 332 to rotate when the rotating shaft 321 rotates. At this time, when the rotating rod 332 rotates, the protrusion 333 contacts and pushes the lifting plate 34 to move downward.

[0066] It should also be noted that the specific gear size of the meshing gear assembly 331 here is generally adjusted according to the actual PCBA board to ensure that when the PCBA board enters the cavity 312, the test probe can stably and accurately contact and detect and connect the PCBA board terminals.

[0067] In a specific implementation, when the bump 333 drives the lifting plate 34 to move downward, it can drive the detection frame 38 and the strip needle bed plate 39 to move downward synchronously, ensuring that the probe and the terminal have appropriate and stable pressure contact, which not only ensures good electrical contact but also avoids damage caused by excessive pressure.

[0068] In a specific embodiment, an indicator light 313 is further provided on the detection box 31, a power module is further provided inside the single board detection tooling, the power module can be connected to a preset analog signal, and a level detection circuit, a light driving circuit and a control driving circuit are further provided inside the single board detection tooling, wherein:

[0069] The control driving circuit is used to control the operation of the electrical components of the driving device. Specifically, the control driving circuit is responsible for controlling the operation of the electrical components of the driving device (such as the linear motor 23), realizing the automatic control of the detection process, reducing manual intervention, ensuring the standardized execution of the detection process, and improving the overall detection efficiency;

[0070] The level detection circuit is connected to the power module and the test probes of the three groups of bar-shaped needle bed boards 39, and is used to detect whether the three-phase circuit of the PCBA board fails when the test probes are in contact with the terminals of the PCBA board. Specifically, the level detection circuit can monitor the three-phase circuit status of the PCBA board in real time when the test probes are in contact with the terminals. Once a fault (such as short circuit, open circuit, abnormal level, etc.) is detected, the corresponding fault signal is immediately triggered to provide timely and accurate information for subsequent processing;

[0071] The light driving circuit is connected to the level detection circuit and the indicator light 313, and is used to control different indicator lights 313 to emit light signals according to the detection results of the PCBA board terminal status. Specifically, the light driving circuit can control the indicator light 313 to emit lights of different colors or flashing modes according to the detection results output by the level detection circuit. For example, the green indicator light 313 indicates normal, the red indicator light 313 indicates a fault, and the yellow indicator light 313 indicates that the circuit is not detected, which simplifies the fault identification process, helps to quickly locate the problem, and shortens the troubleshooting time.

[0072] Therefore, in the specific implementation process, the operator only needs to use the indicator light 313 set on the detection box 31 to feedback the PCBA board terminal status detection results with intuitive light signals. Without in-depth understanding of complex circuit detection data, it is possible to quickly determine whether there is a fault in the board, which greatly improves the visual management efficiency and fault identification speed of the production site.

[0073] At the same time, in view of the unique voltage measurement circuit (including resistance voltage divider circuit) of the three-phase electricity meter, which is directly connected to the MCU, and the three-phase current is connected through terminals, a dedicated current terminal slot is set on the test detection structure. Combined with the power module and the preset analog signal, it can accurately simulate the voltage and current input in the actual working environment, ensuring a comprehensive and realistic test of the voltage measurement circuit and current detection function.

[0074] In addition, it can be explained that, based on the above description, the single-board detection tooling can also be provided with a metering module, a display module and a sampling detection circuit, which are used to connect the metering module and the sampling detection circuit with the level detection circuit, and sample the voltage and current, and convert them into digital data (electric energy pulses) of actual electric energy through the metering chip for output, which is used to display specific values ​​on the display module.

[0075] In summary, the single-board detection tooling structure delivers the PCBA board into the detection structure 3 through the rack structure 2, and can use the lifting plate 34 on the detection structure 3 to press down, so that the test probe on the strip needle bed plate 39 is in contact and connected with the PCBA board terminal. Therefore, the intelligence level of the three-phase electric energy meter PCBA board detection can be improved, and its fault detection and processing capabilities in a complex production environment are enhanced, providing strong support for improving the overall quality and production efficiency of smart meter manufacturing.

[0076] In a specific embodiment, the single board inspection tooling also includes a movable claw structure for picking up, loading, unloading and classifying the PCBA boards, which is used to identify and grab the corresponding PCBA boards and place them on the limiting bracket 22 of the rack conveying structure 2.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0078] In addition, it should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0079] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that A and B meet at the same time. In addition, in the embodiments of the utility model, "multiple" refers to more than two. 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. When the combination of technical solutions is 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 utility model.

Claims

1. A single board detection tool for a three-phase electric energy meter, characterized in that: The invention comprises a control box base (1) and a carrying structure (2) and a detection structure (3) installed on the control box base (1), wherein: A conveying structure (2) is installed on one side of the upper surface of the control box base (1) and is used to place the PCBA board and drive the PCBA board into the detection structure (3); The detection structure (3) is used to perform electrical connection detection on the terminal structure on the internal PCBA board.

2. The single-board detection tool for a three-phase electric energy meter according to claim 1, characterized in that: The conveying structure (2) comprises a base (21) mounted on the control box base (1), a limiting bracket (22) located on the base (21), a linear motor (23) embedded in the base (21), and a push plate (24) located above the base (21), wherein: A limiting bracket (22) is used for locking and limiting the placement of the PCBA board; A linear motor (23) for driving a push plate (24) to move closer to or farther from the detection structure (3); When the push plate (24) approaches the detection structure (3), the push plate (24) contacts and pushes the PCBA board on the limiting bracket (22) into the detection structure (3).

3. The single-board detection tool for a three-phase electric energy meter according to claim 1, characterized in that: The detection structure (3) comprises a detection box body (31) mounted on a control box base (1), wherein: A cavity (312) is provided inside the detection box (31), and openings (311) communicating with the cavity (312) are provided on two opposite sides of the detection box (31), and one group of the openings (311) faces the racking structure (2).

4. The single-board detection tool for a three-phase electric energy meter according to claim 3, characterized in that: The detection structure (3) also includes two groups of rubber wheels (32) rotatably embedded in the bottom of the cavity (312) and arranged in parallel, a lifting plate (34) sliding in the vertical direction above the cavity (312), a lifting control component (33) for controlling the lifting plate (34) to move in the vertical direction, a limiting sliding component (35) for limiting the lifting plate (34) to move in the vertical direction in the cavity (312), a plurality of lifting springs (36) arranged above the lifting plate (34) and connected to the upper wall of the cavity (312), a detection frame (38) installed at the bottom of the lifting plate (34) through an elastic connector (37), and three groups of strip needle bed plates (39) located on the inner side of the detection frame (38) and arranged in parallel, and at least two groups of symmetrically arranged test probes are arranged on the three groups of strip needle bed plates (39), and the test probes are used to contact and detect PCBA board terminals.

5. The single-board detection tool for a three-phase electric energy meter according to claim 4, characterized in that: The rubber wheels (32) are rotatably embedded in the bottom of the cavity (312) via rotating shafts (321) on both sides, and the rotating shafts (321) on the same side of adjacent rubber wheels (32) are connected via synchronous pulleys (322).

6. The single-board detection tool for a three-phase electric energy meter according to claim 5, characterized in that: The lifting control assembly (33) comprises a meshing gear assembly (331) installed on the inner wall of the cavity (312) and connected to the rotating shaft (321), a rotating rod (332) rotating above the cavity (312) and arranged parallel to the rotating shaft (321), and a plurality of groups of protrusions (333) arranged on the rotating rod (332); The meshing gear assembly (331) is connected to the rotating rod (332) and is used to drive the rotating rod (332) to rotate when the rotating shaft (321) is rotating; When the rotating rod (332) is in a rotating state, the protrusion (333) contacts and pushes the lifting plate (34) to move downward.

7. The single board detection tool for a three-phase electric energy meter according to claim 4, characterized in that: A slide rail structure with a fixed distance structure is arranged inside the detection frame (38), and the three groups of strip-shaped needle bed plates (39) are controlled by the slide rail structure to slide and position inside the detection frame (38).

8. The single board detection tool for a three-phase electric energy meter according to claim 4, characterized in that: The elastic connecting member (37) comprises a sleeve (371), a sliding piston (373) sliding in the sleeve (371), a sliding rod (372) arranged on one side of the sliding piston (373) and slidingly extending out of the sleeve (371), an extrusion spring (374) arranged on the other side of the sliding piston (373), and a through hole (375) opened on one end of the sleeve (371) away from the sliding rod (372).

9. The single board detection tool for a three-phase electric energy meter according to claim 4, characterized in that: The detection box (31) is also provided with an indicator light (313), the single board detection tooling is also provided with a power module, the single board detection tooling is also provided with a level detection circuit, a light driving circuit and a control driving circuit, wherein: Control drive circuit, used to control the operation of electrical components of the drive device; A level detection circuit, connected to the power module and the three groups of test probes of the strip-shaped needle bed boards (39), is used to detect whether a fault occurs in the three-phase circuit of the PCBA board when the test probes are in contact with the terminals of the PCBA board; The light driving circuit is connected to the level detection circuit and the indicator light (313) and is used to control the indicator light (313) to emit different light signals according to the detection result of the terminal state of the PCBA board.

10. The single board detection tool for a three-phase electric energy meter according to any one of claims 1 to 9, characterized in that: The single board inspection tool also includes a movable claw structure for picking up, loading, unloading and classifying and placing the PCBA board.

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