An electrically controlled and adjustable electric energy meter strong magnetic test bench

Abstract

The present invention relates to an electrically controlled adjustable strong magnetic test bench for electric energy meters, comprising a strong magnet for generating a magnetic field required for testing; a test platform for placing the electric energy meter to be tested; a control system, comprising a controller housing, a controller screen, an internal control circuit and a control harness, for controlling the movement, position and electric control adjustment of the magnetic pole direction of the strong magnet; a mobile system, comprising a clamping mechanism, a support bracket, a track, a chain, a lead screw, an up and down movable motor and a flip motor, for achieving height adjustment and magnetic pole direction rotation of the strong magnet; and a frame for supporting the test platform and the mobile system. Through electric control, the magnetic field polarity on the surface of the test platform can be adjusted; at the same time, different test magnetic intensities can be simulated at a preset height to meet the test requirements of different magnetic field intensities; the device achieves efficient adjustment of the magnet fixation and magnetic field intensity through the setting and coordination of a simple structure.

Description

Technical Field

[0001] The invention relates to the technical field of electric energy meter magnetic field testing, and in particular to an electrically controlled adjustable electric energy meter strong magnetic testing platform. Background Art

[0002] In the process of strong magnetic testing of electric energy meters by the International Electrotechnical Commission, traditional methods usually rely on magnets of fixed magnetic strength, such as 200mT, 500mT and other different specifications, to exert a strong magnetic field on the electric energy meter in all directions to verify its performance and stability under external magnetic field interference, which is crucial to ensure the reliability and accuracy of the electric energy meter in actual use. For the test bench using a magnet with fixed magnetic field strength in the prior art, it is impossible to meet the requirements of multi-level strong magnetic testing, and it is not convenient to adjust the polarity of the magnet, resulting in low efficiency when multiple magnetic field strengths need to be simulated, which limits the flexibility of the test. In addition, the device for controlling the magnetic field strength based on the current size in the prior art is usually complex in structure, and has high manufacturing and use costs, which is not conducive to the promotion of miniaturized applications. Summary of the invention

[0003] In order to solve the above problems, the present invention provides an electrically controlled adjustable strong magnetic test bench for electric energy meters, comprising a strong magnet, a test platform, a control system, a mobile system and a frame. The control system comprises a controller housing, a controller screen, an internal control circuit and a control harness. The mobile system comprises a clamping mechanism, a support bracket, a track, a chain, a lead screw, an up and down movable motor and a flip motor. The strong magnet is centrally placed at the center of the clamping mechanism to generate the magnetic field required for the test. The electric energy meter to be tested is placed on the test platform. The frame is used to support the test platform and the mobile system. The control system is electrically connected to the flip motor, and the flip motor drives the chain to drive the strong magnet to rotate. The control system is electrically connected to the up and down movable motors to drive the strong magnet to move up and down along the track.

[0004] On the basis of the above scheme, the control system stores the magnetic field strength data corresponding to the strong magnet at different heights, and controls the up and down movable motors through the touch operation of the controller screen.

[0005] On the basis of the above solution, the clamping mechanism is fixed on the supporting bracket, and the clamping mechanism is driven to rotate by the flip motor to adjust the orientation of the N pole and the S pole of the strong magnet.

[0006] On the basis of the above scheme, the up and down movable motor drives the support bracket to slide up and down along the track through the lead screw to adjust the distance between the strong magnet and the test platform.

[0007] On the basis of the above solution, the clamping mechanism includes a clamping frame, a clamping plate, a screw and a rotating shaft, and the flip motor drives the chain through the rotating shaft to provide power for the rotational movement of the clamping mechanism.

[0008] On the basis of the above scheme, internal threads are formed in the openings on both sides of the clamping frame, and the clamping plates on both sides are pushed toward the center at the same time by tightening the screws, thereby providing clamping force to the strong magnet.

[0009] On the basis of the above scheme, the test platform is provided with an opening which cooperates with the strong magnet, and the size of the opening is slightly larger than the strong magnet, so that the strong magnet can move up and down.

[0010] On the basis of the above solution, the frame is made of aluminum material, and the test platform is fixed to the frame by fixing screws.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the magnetic field polarity on the surface of the test platform can be adjusted by electric control, and different test magnetic intensities can be simulated at a preset height to meet the test requirements of different magnetic field intensities; the device achieves the fixation of the magnet and the efficient adjustment of the magnetic field strength through the setting and coordination of a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 3 It is a schematic diagram of the assembly relationship structure of the present invention; Figure 4 It is a schematic diagram of the assembly relationship structure from another perspective of the present invention; Figure 5 It is a schematic diagram of the local structure of the present invention; Figure 6 It is a schematic diagram of the structure of the clamping mechanism of the present invention; DETAILED DESCRIPTION The present invention will be further described below in conjunction with the accompanying drawings: In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0013] In the description of the present invention, it is necessary to understand that the terms "left", "right", "front", "back", "top", "bottom", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0014] like Figures 1 to 4 As shown, the present invention provides an electrically controlled adjustable strong magnetic test bench for electric energy meters, comprising a strong magnet 1, a test platform 2, a control system 3, a moving system 4, and a frame 5; wherein the strong magnet is used to generate a magnetic field, is fixed at the center of a clamping mechanism, and meets different test requirements through rotation and height adjustment; the test platform is made of non-metallic materials, and acrylic materials can be used in this embodiment, and is installed on the upper part of the frame using fixing screws, and a through hole matching the size of the strong magnet is opened in the center to facilitate the up and down movement of the strong magnet; the control system is composed of a controller housing 31, a controller screen 32, an internal control circuit and a control harness 33, which are used to control the rotation direction and height adjustment of the strong magnet; the moving system is composed of a clamping mechanism 41, a support bracket 42, a track 43, a chain 44, a lead screw 45, an up and down movable motor 46 and a flip motor 47, which realize the height adjustment of the strong magnet and the switching of the magnetic pole direction; the frame is assembled from aluminum profiles of different lengths with a cross-sectional size of 40mm×40mm, and is used to provide overall support for the test platform. Aluminum is a non-magnetic material and will not be attracted or disturbed by strong magnets. Therefore, using aluminum profiles as frames will not affect the magnetic field distribution of strong magnets, nor will it have any adverse effects on the test results.

[0015] To avoid affecting the strong magnet, the clamping mechanism 41 is made of non-metallic material, such as Figure 5 and Figure 6 As shown, the clamping mechanism is composed of a clamping frame 411, a clamping plate 412, a screw 413, and a rotating shaft 414. The strong magnet is fixed at the center of the clamping frame. The holes on both sides of the clamping frame are internally threaded. By locking the screws and pushing the clamping plates on both sides to move toward the center at the same time, the strong magnet is provided with a clamping force. The other two sides of the clamping frame are each equipped with a rotating shaft. The support bracket 42 is connected to the flip motor 47 through the rotating shaft 414. Specifically, two circular holes are set on the outer side where the support bracket is connected to the clamping frame 411, which are used to cooperate with the rotating shaft, so that the clamping mechanism 41 can only rotate on the support bracket. The flip motor drives the rotating shaft 47 through the chain 44, driving the strong magnet to rotate, and realizing the switching of the magnetic pole direction (N pole or S pole).

[0016] The height adjustment of the strong magnet is completed by the up and down movable motor 46, the screw 45 and the track 43 in the mobile system. Specifically, there are 4 through holes on the four corners of the top of the support bracket 42, and four tracks 43 are installed. The up and down movable motor 46 drives the screw 45 to drive the support bracket to move up and down along the track, thereby changing the relative height of the strong magnet 1 and the test platform 2.

[0017] Preferably, a flip motor is arranged on the right side of the support bracket to drive the chain through the rotating shaft to provide power for the rotational movement of the clamping mechanism, and an up and down movable motor is arranged on the left side of the support bracket to provide power for the up and down movement of the support bracket.

[0018] The control system 3 sends control signals to the up and down movable motor 46 and the flip motor 47 through the control harness 33, and can be controlled by the touch button on the controller screen 32. The user can select the target magnetic pole direction through the controller screen, and send a signal according to the height parameter set by the user to achieve the height adjustment of the strong magnet. Specifically, the control system can achieve the up and down movement of the mobile system 4, the positioning in the height direction, and the N pole and S pole of the strong magnet 1 facing upward.

[0019] Since the magnetic field strength of a strong magnet decreases with increasing distance, based on this characteristic, through experimental operation, the data of the magnetic field strength received by the electric energy meter when the strong magnet is in different positions is recorded, and the data of different magnetic field strengths at different distances from the strong magnet to the surface of the test platform are pre-entered in the control system for the requirements for different magnetic field strengths in the subsequent electric energy meter testing process.

[0020] According to the device provided in the present application, the test platform 2 is fixed to the frame by fixing screws, and an opening slightly larger than the strong magnet is opened in the center of the platform to provide space for the strong magnet to move. Preferably, the surface of the test platform is flat and can carry electric energy meters of different sizes, adapting to a variety of test scenarios.

[0021] When the device is in use, after power is turned on, the control system initializes the flip motor and the up and down movable motor to ensure that the device is in the initial position; then the user inputs the target magnetic pole direction and height parameters through the controller screen; the control system sends instructions to the mobile system to drive the up and down movable motors to adjust the height, and adjusts the magnetic pole direction through the flip motor; after the parameter adjustment is completed, the electric energy meter 6 to be tested is placed on the test platform to test the magnetic field strength and polarity direction.

[0022] Furthermore, the device provided by the present invention adjusts the magnetic field strength by controlling the distance between the strong magnet and the test platform. Before use, it is necessary to measure the surface magnetic field strength of the strong magnets of N and S grades used, mark the 0mm position (default position) in the controller, and the default position is the flush position of the strong magnet and the test platform, and record the magnetic field strength of the default position. Usually, the magnetic field strength of the strong magnet at the default position is higher than the requirements of common tests. For the test of electric energy meters, the current common requirements are 200 mT, 400 mT, 500 mT, 700 mT, etc., so the default position is usually taken as >700 mT. After recording the default position data, the magnet is controlled to move downward through the control system, and the change of magnetic field strength is tested on the surface of the test bench, i.e., the surface where the meter is placed. When the magnetic field strength drops to the required magnetic field strength (such as 500 mT or 200 mT), the position data of the magnet is recorded in the controller. In this embodiment, 50 mT is counted as a gear in the controller, and the magnet is moved to the corresponding position through the control system when used.

[0023] In order to improve the control accuracy, the present invention uses a servo motor to improve the accuracy and stability of the movement of the upper and lower strong magnets, so that the magnetic field strength of each gear can be accurately reproduced. In addition, the test platform, clamping mechanism and other mechanisms near the magnet are all made of non-metallic materials to eliminate the obstruction of the device to the magnetic induction lines, thereby improving the accuracy of the device. Compared with the control method of the electromagnet by the current size, the solution of the present application has the characteristics of being more miniaturized and lower cost. At the same time, for the size requirements of the IEC standard for testing strong magnets (usually 50*50*50cm), this device is more in line with the electromagnet solution, and the clamping mechanism of this device can be replaced to replace magnets of different sizes.

[0024] When operating this device, first manually control it through the control system, input up or down signals to the servo motor, the servo motor receives the signal to rotate forward or reverse, and the clamping device can be moved up and down through the lead screw. When it moves to a certain position with the magnetic field strength we need, exit the manual control, and record it as the first position point, and note the corresponding first magnetic field strength. Repeat the above operation, record multiple position points and magnetic field strength points, and the parameter adjustment and setting are completed, and the data is saved in the controller. When in use, by directly inputting the magnetic field strength data, the controller converts it into position point data, sends the motor signal to rotate forward or reverse, and makes the strong magnet move accurately to the preset position.

[0025] According to the present application, automatic adjustment of magnetic field strength and direction is achieved through a control system and a mobile system, which greatly reduces manual operations and improves test efficiency; and the equipment supports testing requirements for a variety of magnetic field strengths and polarity directions, and diversified tests can be completed without replacing magnets; the electric adjustment method avoids the safety hazards caused by manual operation of strong magnets.

[0026] The basic principles and main features of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments. Therefore, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An electrically controlled adjustable electric energy meter strong magnetic test bench, characterized in that: The invention comprises a strong magnet (1), a test platform (2), a control system (3), a moving system (4) and a frame (5). The control system (3) comprises a controller housing (31), a controller screen (32) and an internal control circuit and a control harness (33). The moving system (4) comprises a clamping mechanism (41), a support bracket (42), a track (43), a chain (44), a lead screw (45), an up-and-down movable motor (46) and a flipping motor (47). The strong magnet (1) is centrally placed at the center of the clamping mechanism (41) to generate a magnetic field required for the test. An electric energy meter (6) to be tested is placed on the test platform (2). The frame (5) is used to support the test platform (2) and the moving system (4). The control system (3) is electrically connected to the flipping motor (47). The flipping motor (47) drives the chain (44) to drive the strong magnet (1) to rotate. The control system (3) is electrically connected to the up-and-down movable motor (46) to drive the strong magnet (1) to move up and down along the track (43).

2. The electrically controlled adjustable electric energy meter strong magnetic test bench according to claim 1 is characterized in that: The control system (3) stores magnetic field strength data corresponding to the strong magnet (1) at different heights, and controls the up and down movable motor (46) through touch operation of the controller screen (32).

3. The electrically controlled adjustable electric energy meter strong magnetic test bench according to claim 1 is characterized in that: The clamping mechanism (41) is fixed on the supporting bracket (42), and the clamping mechanism (41) is driven to rotate by the flip motor (47) to adjust the orientation of the N pole and the S pole of the strong magnet (1).

4. The electrically controlled adjustable electric energy meter strong magnetic test bench according to claim 1 is characterized in that: The up-and-down movable motor (46) drives the support bracket (42) to slide up and down along the track (43) via the lead screw (45), thereby adjusting the distance between the strong magnet (1) and the test platform (2).

5. The electrically controlled adjustable electric energy meter strong magnetic test bench according to claim 1 is characterized in that: The clamping mechanism (41) comprises a clamping frame (411), a clamping plate (412), a screw (413) and a rotating shaft (414); the flip motor drives the chain (44) to provide power for the rotational movement of the clamping mechanism (41) via the rotating shaft (414).

6. The electrically controlled adjustable electric energy meter strong magnetic test bench according to claim 5 is characterized in that: The openings on both sides of the clamping frame (411) are provided with internal threads, and the clamping plates (412) on both sides are pushed toward the center simultaneously by locking screws (413), thereby providing clamping force to the strong magnet (1).

7. The electrically controlled adjustable electric energy meter strong magnetic test bench according to claim 1 is characterized in that: The test platform (2) is provided with an opening that cooperates with the strong magnet (1), and the size of the opening is slightly larger than the strong magnet (1), so that the strong magnet can move up and down.

8. The electrically controlled adjustable electric energy meter strong magnetic test bench according to claim 1 is characterized in that: The frame (5) is made of aluminum material, and the test platform (2) is fixed to the frame (5) by means of fixing screws.

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