An electric energy meter detection system
By using a power frequency magnetic field coil, a dual-axis motor, and interference components, combined with a support and adjustment assembly, the problems of probe damage and magnetic field interference during the electricity meter testing process were solved, thus achieving accuracy and reliability of the electricity meter testing results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HENAN WEISIDA ELECTRIC CO LTD
- Filing Date
- 2026-04-08
- Publication Date
- 2026-05-29
AI Technical Summary
Existing electricity meter testing devices are prone to damage when the probe is connected to the electricity meter during the testing process, and the test results are affected by power frequency magnetic field interference, resulting in a large error between the test data and the actual results.
The system employs a power frequency magnetic field coil, a dual-axis motor, an interference component, and a support adjustment component. The dual-axis motor drives the interference component to perform 360° interference without blind spots, simulating the actual working scenario of an electricity meter. Combined with the support adjustment component, it achieves multi-dimensional magnetic field interference simulation, ensuring the accuracy of the test results.
It effectively simulates the vibration and magnetic field interference of electricity meters in actual working scenarios, reduces the deviation between the test data and the actual results, and improves the accuracy and reliability of the test results.
Smart Images
Figure CN122109974A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of electricity meter testing technology, specifically to an electricity meter testing system. Background Technology
[0002] The three-phase four-wire electronic carrier energy meter is a smart meter that integrates energy metering and power line carrier communication. It connects to the power grid through a three-phase four-wire system and uses existing power lines as the communication medium to transmit data, eliminating the need for additional communication lines.
[0003] To ensure the accuracy of electricity meters, testing is necessary. However, existing electricity meter testing devices require rotating a connecting rod to insert the probes into the voltage and auxiliary terminal interfaces of the electricity meter, thus connecting the meter to the testing equipment. However, this rotation follows a circular trajectory, causing the probes to not directly align with the corresponding connections, resulting in pressure between the probes and the connections, which can easily damage the probes or the electricity meter. To address this problem, existing technologies offer better solutions. For example, an electricity meter testing device with publication number CN113985344B allows the mounting bracket and probes to move only up and down during the insertion of the probes into the voltage and auxiliary terminal interfaces of the electricity meter, effectively reducing the pressure between the probes and the electricity meter and preventing damage to both. However, the following drawbacks still exist: the use of electricity meters is susceptible to interference from power frequency magnetic fields in the environment. Existing power frequency magnetic field immunity detection devices mainly use stepper motors to drive coils to flip in order to find the point of maximum induced current. However, this detection is static. In actual scenarios of small, enclosed distribution boxes, the strong power frequency magnetic field generated by the transient start-up and shutdown of large loads will inevitably be accompanied by high-frequency mechanical micro-vibrations of cables and box structures caused by electrodynamic forces. These mechanical micro-vibrations will cause high-frequency distortion of the spatial micro-distance between the radio frequency antenna and the electricity meter inside the box, modulating the static radiation into dynamic spatial ripples, thereby affecting the detection process and causing a large error between the detection data and the actual results.
[0004] Therefore, in order to solve the above problems, an electricity meter detection system is proposed. Summary of the Invention
[0005] The purpose of this invention is to provide an electricity meter testing system that solves the problem of the inability to effectively simulate the actual working scenario of the electricity meter during the testing process, thus affecting the accuracy of the test results. By using a power frequency magnetic field coil, a dual-axis motor, an interference component, and a support adjustment component, the system can achieve 360° axial interference without blind spots during the testing process, ensuring the accuracy of the test results while effectively replicating the actual working scenario.
[0006] To achieve the above objectives, the present invention provides the following technical solution: An electricity meter testing system includes a base and a testing platform. The testing platform is positioned above the base and is used to install and fix the electricity meter under test. It also includes a ring plate, a power frequency magnetic field coil, a dual-axis motor, an interference component, and a support and adjustment component. The ring plate and the testing platform are rotatably connected via bearings. The power frequency magnetic field coil and the dual-axis motor are both fixedly mounted on the ring plate. The dual-axis motor is connected to the ring plate via an "L"-shaped plate. The interference component is positioned above the testing platform and connected to the power frequency magnetic field coil and the dual-axis motor. When the dual-axis motor is energized, it drives the interference component to perform irregular horizontal reciprocating oscillations and drives the testing platform to perform reciprocating rotation. The support and adjustment component is positioned on the base and connected to the testing platform and the ring plate, used to detect the tilt angle between the electricity meter under test on the platform and the interference component. When the ring plate rotates, it drives the support and adjustment component to rotate synchronously.
[0007] Preferably, the interference component includes a guide rod, a mounting plate, a spring, a fixing rod, a cam, a gear ring, and a gear. The guide rod is disposed on a power frequency magnetic field coil, and two power frequency magnetic field coils are arranged in a circumferential array along the surface of the annular plate. Two guide rods are disposed and symmetrically fixed between the two power frequency magnetic field coils. The mounting plate is disposed on the guide rod and is used to mount a radio transmitting antenna, which is oriented towards the central axis of the detection platform. The spring is sleeved on the guide rod and its two ends are respectively connected to the power frequency magnetic field coil and the mounting plate. The fixing rod is disposed on the mounting plate and has a ball bearing rotatably disposed at its end. The cam is disposed on one of the output ends of the dual-axis motor and its side makes rolling contact with the ball bearing. The gear ring is fixedly sleeved on the detection platform, and the gear is disposed on the other output end of the dual-axis motor and meshes with the gear ring.
[0008] It is known that conventional testing processes are usually conducted under static conditions, which cannot effectively simulate the actual working conditions of an electricity meter, leading to deviations between the test results and the data under actual operating conditions. Therefore, this solution is adopted. By using a dual-axis motor, cam, fixed rod, and mounting plate, the rotation of the cam during the operation of the dual-axis motor drives the fixed rod and mounting plate. This causes the radio transmitting antenna mounted on the mounting plate to reciprocate horizontally under the action of a guide rod and spring, thereby simulating the vibration scenario of an electricity meter during actual operation and ensuring the accuracy of the test results.
[0009] Preferably, the support adjustment assembly includes a universal ball hinge, an electric push rod, and a hinge rod. The universal ball hinge is fixedly disposed between the base and the detection platform. The electric push rod is disposed on the base. One end of the hinge rod is connected to the output end of the electric push rod, and the other end is connected to the bottom of the annular plate. A ball sleeve is disposed on the detection platform via a fixed frame. A hollow sphere is disposed inside the ball sleeve. A connecting rod passes through the interior of the hollow sphere. A counterweight is fixedly disposed at the lower end of the connecting rod, and a placement plate is fixedly disposed at the upper end. The geometric center of the universal ball hinge and the geometric center of the hollow sphere both intersect with the central axis of the detection platform.
[0010] It is known that the direction of the power frequency magnetic field interference source experienced by an electricity meter under actual working conditions is not fixed, but rather it is affected in all directions. However, conventional testing processes can usually only interfere with the electricity meter from a single direction, which limits the accuracy of the test results. Therefore, this solution is adopted. Through the designed support and adjustment components, the angle of the testing platform can be adjusted using an electric push rod and a hinge rod, while the weight of the counterweight guides the connecting rod, ensuring that the placement plate at the upper end of the connecting rod remains horizontal under the action of the counterweight. This allows the testing platform to rotate during the operation of the dual-axis motor, in conjunction with the meshing of the gear ring and gear, ensuring that the electricity meter under test is subjected to magnetic field interference from different directions during the testing process, further guaranteeing the accuracy of the test results.
[0011] Preferably, the edge of the cam has multiple irregular grooves, and both ends of each groove are smoothly connected to the edge of the cam.
[0012] It is known that the mechanical resonance frequency of the conductors caused by the electrodynamic force generated by the large current in the distribution box is usually the power frequency (50Hz) and its harmonics (100Hz, 150Hz, etc.), which belongs to high-frequency micro-vibration. If a conventional cam is used to generate 50Hz (50 times per second) physical vibration, the motor must reach a high speed of over 3000 rpm, and the radio transmitting antenna mounted on the mounting plate must move back and forth at high speed in the horizontal direction. This would cause the entire detection system to be extremely prone to wear and heat, and the vibration noise would be extremely high, seriously affecting the service life of the detection system. Therefore, this solution is adopted. By opening multiple grooves on the edge of the cam, the mounting plate can be moved back and forth at high frequency by means of a fixed rod, multiple grooves and springs when the dual-axis motor outputs at low speed. At the same time, the distance between the mounting plate and the energy meter under test can be continuously adjusted during the high-frequency reciprocating movement of the mounting plate, thereby achieving effective simulation of the actual working condition of the energy meter while ensuring the service life of the detection system.
[0013] Preferably, when the annular plate drives the power frequency magnetic field coil to rotate to the maximum induced current flip angle of the PCBA board inside the energy meter, the placement plate tilts around the hollow sphere to a limit grazing pose orthogonal to the flip angle.
[0014] By adopting the above scheme, the micro-change in spatial distance caused by mechanical micro-vibration can be amplified to the maximum extent under the extreme grazing state, thereby effectively capturing and evaluating the influence of dynamic magnetic field on the metering accuracy of the energy meter under test, and effectively reducing the deviation between the test data and the actual operating results.
[0015] Preferably, the spring is in its natural state when the base circle of the cam contacts the ball, and the friction between the mounting plate and the guide rod is less than or equal to the compressive force experienced by the spring when it is deformed.
[0016] By adopting the above scheme, when the dual-axis motor drives the cam to rotate, as the cam's lift section moves away from the fixed rod, the mounting plate can overcome the friction between itself and the guide rod under the elastic force of the spring, thereby ensuring that the ball bearings at the end of the fixed rod always maintain a stable fit with the edge of the cam.
[0017] Preferably, the diameter of the toothed ring is larger than the diameter of the gear, the frictional force between the hollow sphere and the ball sleeve is set to F1, the inertial force generated when the detection platform rotates is set to F2, and the weight of the counterweight is set to F3, wherein F1 <F2<F3。
[0018] By adopting the above scheme, the testing platform can drive the placement plate to rotate synchronously at low speed during the operation of the dual-axis motor, thereby driving the energy meter under test set on the placement plate to rotate, realizing 360° all-round interference of the power frequency magnetic field on the energy meter under test.
[0019] Preferably, the number of grooves is greater than 10 and is a prime number.
[0020] It is known that when the number of grooves is even, after the dual-axis motor drives the cam to rotate a certain number of times, it will fall into a "dead loop." That is, every time the radio transmitting antenna jitters to the moment it is closest to the energy meter, the energy meter always maintains the same tilt angle, resulting in a large number of coupling dead angles not being tested, which will still affect the test results. Therefore, this scheme is adopted. Since the number of grooves cannot be divided evenly, in the continuous test cycle, the spatial tilt angle of the energy meter and the main magnetic field cutting angle encountered by the radio transmitting antenna at each high-frequency approach (radiation spike) are completely random and non-repeating, thus avoiding coupling dead angles and further ensuring the accuracy of the test results.
[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By using a dual-axis motor and interference components, and utilizing multiple irregular grooves on the edge of the cam, the circular motion of the dual-axis motor is converted into high-frequency, irregular reciprocating oscillation of the mounting plate in the horizontal direction during the operation of the dual-axis motor, in conjunction with the elastic reset of the spring and the rolling contact of the ball at the end of the fixing rod. This effectively simulates the mechanical micro-vibration of cables and enclosures caused by the start and stop of large loads in actual power distribution scenarios, solves the problem of dynamic spatial ripple interference caused by high-frequency distortion due to spatial micro-distance, effectively simulates a multi-dimensional interference test environment, and thus ensures the accuracy of the test results.
[0022] 2. By using the set support adjustment components and the gear ring and gears to cooperate and transmit the transmission, the angle tilt adjustment of the detection platform during the rotation process is realized. This changes the defect of the single fixed direction of the interference source in the existing technology, and enables the power frequency magnetic field coil to simulate the 360° all-round magnetic field environment and different grazing angles encountered by the power meter under test in actual operation. This allows the detection system to detect the anti-interference effect of the power meter under different spatial postures.
[0023] 3. By setting the number of grooves on the edge of the cam to a prime number, it is ensured that the spatial tilt angle and the angle of entry of the interference magnetic field are randomly distributed and non-repeating each time the radio transmitting antenna approaches the energy meter at high frequency. This fundamentally avoids the "coupling dead angle" phenomenon caused by periodic movement, ensuring that the test data can truly restore the actual measurement accuracy of the energy meter under extreme and variable operating conditions, and further guaranteeing the accuracy of the test results. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the connection structure between the detection platform, the ring plate, and the interference components of the present invention; Figure 4 For the present invention Figure 3 A magnified view of part A in the middle section; Figure 5 For the present invention Figure 3 Schematic diagram of the connection structure between the dual-shaft motor, the gear ring, and the gears; Figure 6 This is a partial cross-sectional view of the connection structure between the base, the detection platform, the annular plate, and the support and adjustment components of the present invention. Figure 7 This is an enlarged view of part B in section 6 of the present invention; Figure 8 This is a diagram showing the state of the detection platform and the annular plate of the present invention when tilted.
[0025] In the diagram: 1. Base; 2. Detection platform; 21. Ball sleeve; 22. Hollow sphere; 23. Connecting rod; 24. Counterweight; 25. Placement plate; 3. Ring plate; 4. Power frequency magnetic field coil; 5. Dual-axis motor; 6. Interference component; 61. Guide rod; 62. Mounting plate; 63. Spring; 64. Fixing rod; 641. Ball bearing; 65. Cam; 651. Groove; 66. Gear ring; 67. Gear; 7. Support adjustment component; 71. Universal ball hinge; 72. Electric push rod; 73. Hinge rod. Detailed Implementation
[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0027] Please see Figures 1 to 8 This invention provides an electricity meter detection system, the technical solution of which is as follows: For details, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 8An electricity meter testing system includes a base 1 and a testing platform 2. The testing platform 2 is positioned above the base 1 and is used to install and fix the electricity meter to be tested. The system also includes a ring plate 3, a power frequency magnetic field coil 4, a dual-axis motor 5, an interference component 6, and a support and adjustment component 7. The ring plate 3 and the testing platform 2 are rotatably connected via bearings. The power frequency magnetic field coil 4 and the dual-axis motor 5 are both fixedly mounted on the ring plate 3. The dual-axis motor 5 is connected to the ring plate 3 via an "L"-shaped plate. The interference component 6 is positioned on the testing platform 2. Above platform 2 and connected to power frequency magnetic field coil 4 and dual-axis motor 5, interference component 6 includes guide rod 61, mounting plate 62, spring 63, fixing rod 64, cam 65, gear ring 66 and gear 67. Guide rod 61 is disposed on power frequency magnetic field coil 4. Two power frequency magnetic field coils 4 are arranged in a circumferential array along the surface of annular plate 3. Two guide rods 61 are disposed and symmetrically fixed between the two power frequency magnetic field coils 4. Mounting plate 62 is disposed on guide rod 61 and is used to install radio transmitting antenna. The linear transmitting antenna is positioned towards the central axis of the detection platform 2. A spring 63 is sleeved on the guide rod 61, with its two ends connected to the power frequency magnetic field coil 4 and the mounting plate 62, respectively. A fixed rod 64 is mounted on the mounting plate 62, with a ball bearing 641 rotatably mounted at its end. A cam 65 is located at one output end of the dual-axis motor 5, and its side makes rolling contact with the ball bearing 641. A gear ring 66 is fixedly sleeved on the detection platform 2. A gear 67 is located at the other output end of the dual-axis motor 5 and meshes with the gear ring 66. The dual-axis motor 5 is controlled by a controller. The control is performed so that the output end of the dual-axis motor 5 rotates in the opposite direction after driving the gear ring 66 to rotate one revolution in the forward direction through the gear 67. When the base circle of the cam 65 contacts the ball 641, the spring 63 is in its natural state. The friction between the mounting plate 62 and the guide rod 61 is less than or equal to the squeezing force on the spring 63 when it is deformed. The edge of the cam 65 is provided with multiple irregular grooves 651. Both ends of each groove 651 are smoothly connected to the edge of the cam 65. The number of grooves 651 is greater than 10 and is a prime number.
[0028] Under the above-mentioned conditions, when testing is required, the dual-axis motor 5 is started. On one hand, one of the output ends of the dual-axis motor 5 drives the cam 65 to rotate. During the rotation of the cam 65, the lifting section approaches and squeezes the ball 641. After being squeezed, the ball 641 transmits the force to the fixed rod 64 and simultaneously squeezes the mounting plate 62 and stretches the spring 63. After being squeezed, the mounting plate 62 moves horizontally along the direction of the fixed rod 64, so that the radio transmitting antenna on the mounting plate 62 is close to the energy meter under test, realizing the position adjustment of the interfering magnetic field. When the lifting section of the cam 65 moves away from the ball 641, the stretched spring 63 overcomes the friction between the mounting plate 62 and the guide rod 61 under its own elastic force and drives the mounting plate. The cam 62 and the radio transmitting antenna are reset, thereby continuously adjusting the position of the radio transmitting antenna. During the rotation of the cam 65, the cooperation between the fixing rod 64 and the multiple grooves 651 on the edge of the cam 65 enables the fixing rod 64 to vibrate at high frequency, thereby causing the radio transmitting antenna mounted on the mounting plate 62 to vibrate at high frequency. On the other hand, the other output end of the dual-axis motor 5 can drive the gear 67 fixedly connected to it to rotate. Since the gear 67 meshes with the gear ring 66 and the gear ring 66 is fixedly sleeved on the detection platform 2, the rotation of the gear 67 can drive the gear ring 66 to drive the detection platform 2 to rotate, thereby realizing the 360° interference of the power frequency magnetic field on the energy meter under test.
[0029] As one embodiment of the present invention, refer to Figure 2 , Figure 5 , Figure 6 , Figure 7 and Figure 8 The support adjustment assembly 7 is mounted on the base 1 and connected to the detection platform 2 and the annular plate 3. The support adjustment assembly 7 includes a universal ball hinge 71, an electric push rod 72, and a hinge rod 73. The universal ball hinge 71 is fixedly mounted between the base 1 and the detection platform 2. The electric push rod 72 is mounted on the base 1. One end of the hinge rod 73 is connected to the output end of the electric push rod 72, and the other end is connected to the bottom of the annular plate 3. A ball sleeve 21 is mounted on the detection platform 2 via a fixing frame. A hollow ball 22 is fitted inside the ball sleeve 21. A connecting rod 23 passes through the interior of the hollow ball 22. A counterweight 24 is fixedly mounted at the lower end of the connecting rod 23. The upper end is fixedly equipped with a placement plate 25. The geometric center of the universal ball hinge 71 and the geometric center of the hollow sphere 22 both intersect with the central axis of the detection platform 2. When the annular plate 3 drives the power frequency magnetic field coil 4 to rotate to the maximum induced current flip angle of the PCBA board inside the energy meter, the placement plate 25 tilts around the hollow sphere 22 to the extreme grazing posture orthogonal to the flip angle. The diameter of the toothed ring 66 is larger than the diameter of the gear 67. The frictional force between the hollow sphere 22 and the ball sleeve 21 is set as F1. The inertial force generated when the detection platform 2 rotates is set as F2. The gravity of the counterweight 24 is set as F3, where F1 <F2<F3。
[0030] Under the above-mentioned conditions, when it is necessary to adjust the tilt angle between the energy meter to be tested on the placement plate 25 and the power frequency magnetic field coil 4, the electric push rod 72 is activated. Since the two ends of the hinge rod 73 are connected to the output end of the electric push rod 72 and the bottom of the annular plate 3 respectively, when the electric push rod 72 is working, the hinge rod 73 pushes the annular plate 3 to adjust its tilt angle under the action of the universal ball hinge 71. Since the annular plate 3 is rotated and sleeved on the detection platform 2, the detection platform 2 can adjust its own angle synchronously with the annular plate 3. However, during the tilting process of the detection platform 2, the placement plate 25 set above it will be kept perpendicular to the base 1 by the connecting rod 23 and the counterweight 24 under the sleeve action of the hollow ball 22 and the ball sleeve 21. That is, the placement plate 25 will always be kept horizontal, thereby realizing the angle adjustment between the energy meter to be tested and the power frequency magnetic field coil 4 set on the placement plate 25.
[0031] Working principle: First, the energy meter under test is fixed on the placement plate 25. The dual-axis motor 5 is started. One output end of the dual-axis motor 5 drives the cam 65 to rotate. The lifting section of the edge of the cam 65 and multiple irregular grooves 651 alternately squeeze the ball 641 at the end of the fixing rod 64. With the help of the spring 63, the mounting plate 62 with the radio transmitting antenna is driven to swing horizontally, at high frequency and irregularly along the guide rod 61, thereby simulating the mechanical micro-vibration environment caused by the start and stop of a large load. At the same time, the other output end of the dual-axis motor 5 drives the gear 67 to rotate. Through the meshing transmission with the gear ring 66 fixed on the detection platform 2, the detection platform 2 is driven to perform reciprocating rotation, realizing the 360° circumferential power frequency magnetic field interference of the energy meter under test. During this dynamic test, if it is necessary to further simulate multi-directional interference and grazing angle changes, the electric push rod 72 set on the base 1 is started. Its output end drives the hinge rod. The 73 deflection pulls or pushes the bottom of the annular plate 3, causing the annular plate 3 and the detection platform 2 above it to tilt around the universal ball hinge 71. At this time, the detection platform 2 is tilted relative to the base 1 through the hollow ball 22 fitted inside the ball sleeve 21. The internal connecting rod 23 remains perpendicular to the base 1 under the gravity guidance of the lower counterweight 24, ensuring that the placement plate 25 maintains the preset limit glancing posture relationship with the tilted power frequency magnetic field coil 4 and interference component 6 under the action of the counterweight 24. Since the number of grooves 651 on the cam 65 is set to a prime number greater than 10, it ensures that the spatial tilt angle and the main magnetic field cutting angle of the radio transmitting antenna approaching the energy meter at high frequency are random and non-repeating in each continuous test cycle. This effectively solves the technical problem that the existing static detection cannot restore the real dynamic electromagnetic ripple interference, and effectively ensures the accuracy of the test results.
[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An electricity meter testing system, comprising a base (1) and a testing platform (2), wherein the testing platform (2) is disposed above the base (1) and is used to install and fix the electricity meter to be tested, characterized in that: It also includes a ring plate (3), a power frequency magnetic field coil (4), a dual-axis motor (5), an interference component (6), and a support adjustment component (7). The ring plate (3) is sleeved with the detection platform (2). The power frequency magnetic field coil (4) and the dual-axis motor (5) are both set on the ring plate (3). The interference component (6) is set above the detection platform (2) and connected to the power frequency magnetic field coil (4) and the dual-axis motor (5). When the dual-axis motor (5) is powered on, it drives the interference component (6) to swing irregularly in a horizontal reciprocating motion and drives the detection platform (2) to rotate reciprocally. The support adjustment component (7) is set on the base (1) and connected to the detection platform (2) and the ring plate (3). It is used to detect the tilt angle between the energy meter under test on the platform (2) and the interference component (6). When the ring plate (3) rotates, it drives the support adjustment component (7) to rotate synchronously.
2. The electricity meter detection system according to claim 1, characterized in that: The interference component (6) includes a guide rod (61), a mounting plate (62), a spring (63), a fixing rod (64), a cam (65), a gear ring (66), and a gear (67). The guide rod (61) is mounted on the power frequency magnetic field coil (4). The mounting plate (62) is mounted on the guide rod (61) and is used to mount a radio transmitting antenna. The spring (63) is sleeved on the guide rod (61) and its two ends are respectively connected to the power frequency magnetic field coil (4) and the mounting plate (62). The fixing rod (64) is mounted on the mounting plate (62) and its end is rotatably equipped with a ball (641). The cam (65) is mounted on one of the output ends of the dual-axis motor (5) and its side is in rolling contact with the ball (641). The gear ring (66) is fixedly sleeved on the detection platform (2). The gear (67) is mounted on the other output end of the dual-axis motor (5) and meshes with the gear ring (66).
3. The electricity meter detection system according to claim 2, characterized in that: The support adjustment assembly (7) includes a universal ball hinge (71), an electric push rod (72), and a hinge rod (73). The universal ball hinge (71) is fixedly installed between the base (1) and the detection platform (2). The electric push rod (72) is installed on the base (1). One end of the hinge rod (73) is connected to the output end of the electric push rod (72), and the other end is connected to the bottom of the annular plate (3). A ball sleeve (21) is installed on the detection platform (2) through a fixed frame. A hollow sphere (22) is installed inside the ball sleeve (21). A connecting rod (23) runs through the interior of the hollow sphere (22). A counterweight (24) is installed at the lower end of the connecting rod (23), and a placement plate (25) is installed at the upper end. The geometric center of the universal ball hinge (71) and the geometric center of the hollow sphere (22) intersect with the central axis of the detection platform (2).
4. The electricity meter detection system according to claim 2, characterized in that: The edge of the cam (65) is provided with a plurality of irregular grooves (651), and both ends of each groove (651) are smoothly connected to the edge of the cam (65).
5. The electricity meter detection system according to claim 3, characterized in that: When the ring plate (3) drives the power frequency magnetic field coil (4) to rotate to the maximum induced current flip angle of the PCBA board inside the energy meter, the placement plate (25) tilts around the hollow sphere (22) to the limit grazing pose orthogonal to the flip angle.
6. The electricity meter detection system according to claim 2, characterized in that: When the base circle of the cam (65) contacts the ball (641), the spring (63) is in its natural state, and the friction between the mounting plate (62) and the guide rod (61) is less than or equal to the compressive force that the spring (63) experiences when it is deformed.
7. The electricity meter detection system according to claim 3, characterized in that: The diameter of the toothed ring (66) is larger than the diameter of the gear (67), the frictional force between the hollow sphere (22) and the ball sleeve (21) is set as F1, the inertial force generated when the detection platform (2) rotates is set as F2, and the weight of the counterweight (24) is set as F3, where F1 <F2<F3。 8. The electricity meter detection system according to claim 4, characterized in that: The number of the grooves (651) is greater than 10 and is a prime number.