A method for detecting smart energy meters based on an alarm system

Abstract

This invention discloses a method for testing smart energy meters based on an alarm system, using a field calibrator to verify smart energy meters installed in a metering cabinet. The metering cabinet is equipped with a protective mechanism and an alarm system triggered by the mechanism. When the lock is forcibly opened, it will trigger the protective mechanism to prevent unauthorized personnel from operating the smart energy meter. If unauthorized personnel attempt to damage the protective mechanism, it will take further protective actions and trigger the alarm system. This invention provides comprehensive protection for the energy meters in the cabinet, preventing not only electricity theft but also malicious tampering with the meter's wiring and parameter settings, ensuring the normal operation of the testing process.

Description

Technical Field

[0001] This invention belongs to the field of electricity meter testing, and specifically relates to a testing method for smart electricity meters. Background Technology

[0002] As the core equipment for electricity metering in a power system, electricity meters are typically installed in metering cabinets to accurately record users' electricity consumption. To ensure the metering accuracy and operational reliability of electricity meters, power departments need to conduct regular inspections. Currently, electricity meter inspection mainly relies on on-site calibrators. By connecting the voltage and current circuits of the electricity meter, the standard values ​​are compared with the actual measured values ​​to determine whether the electricity meter has errors or malfunctions. However, this inspection method depends on the normal condition of the metering cabinet and the standard wiring method of the electricity meter. Once the metering cabinet structure or the electricity meter wiring is damaged or tampered with, the inspection process will be severely affected.

[0003] In practice, some users may destructively modify metering cabinets to steal electricity, such as by opening the cabinet door, short-circuiting current transformers, or altering the wiring of the electricity meter. Such actions not only lead to inaccurate electricity metering but may also result in malicious tampering with the meter's internal parameters or communication settings, preventing the on-site calibrator from connecting or reading data and thus hindering effective testing. Therefore, there is an urgent need for an intelligent detection method that can adapt to complex on-site environments and effectively respond to abnormal states of metering cabinets to improve the accuracy and reliability of electricity meter detection. Summary of the Invention

[0004] This invention proposes a smart energy meter detection method based on an alarm system. Its purpose is to prevent the wiring method and parameter settings of the energy meter from being maliciously tampered with, and to ensure that the detection operation is carried out normally.

[0005] The technical solution of this invention is as follows:

[0006] A method for testing smart energy meters based on an alarm system is provided, which uses a field calibrator to calibrate smart energy meters installed in a metering cabinet. The metering cabinet includes a cabinet body with a cabinet cavity inside, and a meter position for installing smart energy meters in the cabinet cavity. A door is rotatably connected to the front of the cabinet body, a first lock body is installed on the top of the door body, and a second lock body is installed on the top of the cabinet body. The first lock body and the second lock body cooperate with each other to form a lock. The metering cabinet is equipped with a protective mechanism and an alarm system triggered by the protective mechanism.

[0007] The steps of the smart energy meter testing method are as follows:

[0008] Step S1: Check the on-site calibration instrument;

[0009] Step S2: Unlock the lock, open the door, check whether the wiring of the smart energy meter inside is correct and secure, and then connect the field calibrator to the same power circuit as the smart energy meter to be tested.

[0010] Step S3: Start the connected power circuit and record the readings of the smart energy meter and the field calibrator under different operating conditions;

[0011] Step S4: Calibrate the smart energy meter under test according to the reading difference;

[0012] Step S5: Repeat steps S2 to S4 multiple times for testing and calibration;

[0013] When the lock is forcibly opened, it will trigger the protective mechanism to prevent unauthorized personnel from operating the smart meter. If unauthorized personnel attempt to damage the protective mechanism, the mechanism will take further protective actions and trigger the alarm system.

[0014] As a further improvement to the smart energy meter detection method based on the alarm system, the different operating conditions include low load test conditions, high load test conditions, sinusoidal load conditions, and non-sinusoidal load conditions.

[0015] As a further improvement to the smart energy meter detection method based on the alarm system: the protective mechanism includes a first permanent magnet, a second permanent magnet, a slide bar, an L-shaped locking bar, a first elastic device, a mounting plate, and a limiting bar;

[0016] The first permanent magnet is installed in the first lock body, and the second permanent magnet is located at the top of the transmission cavity of the door body and attracts the first permanent magnet; the slide rod moves up and down along the transmission cavity and its upper end is fixedly connected to the second permanent magnet; the lower end of the slide rod is installed with the L-shaped lock bar, and the lower end of the L-shaped lock bar is connected to the door body through the first elastic device, which is used to drive the L-shaped lock bar and the slide rod to move downward.

[0017] The inner end of the L-shaped locking bar extends into the cabinet and is connected to a vertically downward limiting protrusion; the mounting plate is installed at the bottom of the top plate of the cabinet, and the limiting bar is installed on the mounting plate by sliding engagement to achieve forward and backward movement relative to the cabinet; the outer end of the limiting bar is provided with an upward locking buckle, which is located below the front side of the limiting protrusion.

[0018] A limit plate is also fixed on the mounting plate, which is located in front of the limit piece connected to the inner end of the limit strip.

[0019] As a further improvement to the smart energy meter detection method based on the alarm system: a first reinforcing strip is fixedly connected between the mounting plate and the top plate of the cabinet, and a second reinforcing strip is fixedly connected between the limiting plate and the top plate of the cabinet.

[0020] As a further improvement to the smart energy meter detection method based on the alarm system, the protective mechanism also includes an anti-theft cover, a stop plate, and two sliding plates; the two sliding plates are located on the left and right sides of the meter position area, respectively, and are slidably connected to the back panel of the cabinet via guide rails; the two ends of the anti-theft cover are respectively connected to the two sliding plates to move up and down relative to the cabinet following the sliding plates.

[0021] The rear end of the limiting strip is inserted into the first limiting groove opened on the skateboard to prevent the anti-theft cover from falling.

[0022] As a further improvement to the smart energy meter detection method based on the alarm system: the two ends of the anti-theft cover are connected to the corresponding sliding plate by sliding to realize the forward and backward movement relative to the sliding plate. A fourth elastic device is also connected between the end of the anti-theft cover and the corresponding sliding plate. The fourth elastic device is used to drive the anti-theft cover to move towards the back panel of the cabinet.

[0023] The stop plate is located below the area where the position is located;

[0024] The protective mechanism also includes two sets of locking mechanisms located on the back panel of the cabinet; when the anti-theft cover falls onto the stop plate, the fasteners extending backward at both ends of the anti-theft cover correspond to the two locking mechanisms, and are inserted into the locking mechanisms under the drive of the fourth elastic device to lock the anti-theft cover.

[0025] As a further improvement to the smart energy meter detection method based on the alarm system, the protective mechanism further includes a temporary positioning mechanism, which includes a linkage rod, a second elastic device, an extension plate, a horizontal plate, and a limiting block.

[0026] The extension plate is fixed to the top wall of the anti-theft cover, and a second limiting groove is provided on the top of the extension plate;

[0027] The linkage rod is slidably connected to one of the slide plates to achieve up and down movement relative to the slide plate. The lower end of the linkage rod protrudes from the bottom of the slide plate and the anti-theft cover and is used to contact the stop plate. The upper end of the linkage rod is connected to the horizontal plate, which is connected to the slide plate through a second elastic device and is also connected to the limiting block. The second elastic device is used to drive the linkage rod to move downward so that the limiting block is inserted into the second limiting groove.

[0028] As a further improvement to the smart energy meter detection method based on the alarm system: the locking mechanism includes a third elastic device and a wedge-shaped carbon steel lock installed in the locking cavity of the cabinet back panel;

[0029] The locking cavity is connected to the cabinet cavity through the locking channel. The wedge-shaped carbon steel lock is slidably installed on the inner wall of the locking cavity in the left-right or up-down direction. The wedge-shaped carbon steel lock is connected to the inner wall of the locking cavity through a third elastic device. The third elastic device is used to drive the wedge-shaped carbon steel lock to contact the inserted fastener to lock the anti-theft cover.

[0030] An electromagnet is also installed inside the locking cavity, which is used to attract the wedge-shaped carbon steel lock away from the fastener under the control of the control module to complete the unlocking of the fastener.

[0031] As a further improvement to the smart energy meter detection method based on the alarm system: the alarm system includes a power supply, an alarm transmitter, a buzzer, and conductive springs located in two locking cavities respectively. The conductive springs are used to contact the inserted fasteners. The two fasteners are made of conductive material and are electrically connected to each other, thereby forming a conductive path with the two conductive springs.

[0032] The power supply, alarm transmitter, and buzzer are connected in series between two conductive springs.

[0033] As a further improvement to the smart energy meter detection method based on the alarm system: when the lock is forcibly opened, the vibration of the lock will cause the second permanent magnet to break free from the attraction of the first permanent magnet and fall off. Under the action of the first elastic device, the L-shaped lock bar moves downward and the inner end of the L-shaped lock bar is engaged with the latch. At this time, if the door is opened, the L-shaped lock bar will pull the limit bar to move horizontally until the limit piece and the limit plate abut against each other, thereby preventing the door from being opened.

[0034] If the door continues to be forcibly opened, the rear end of the limit strip will leave the first limit groove, and the slide plate and anti-theft cover will begin to fall until the anti-theft cover lands on the stop plate. After the linkage rod touches the stop plate, the linkage rod will move upward relative to the slide plate, causing the limit block to disengage from the second limit groove, releasing the limit on the extension plate and the anti-theft cover. Under the elastic force of the fourth elastic device, the anti-theft cover moves towards the back panel of the cabinet. The two fasteners pass through the locking channel and enter the locking cavity. The fasteners first push the wedge-shaped carbon steel lock to overcome the third elastic force. The device's elastic force moves to the side. After the fastener and conductive spring contact abut each other, the fastener no longer blocks the wedge-shaped carbon steel lock. The wedge-shaped carbon steel lock will reset under the action of the third elastic force device, thereby locking the fastener and the anti-theft cover, preventing the anti-theft cover from being moved, and protecting the smart energy meter on the meter position covered by the anti-theft cover. At this time, the two fasteners, the two conductive spring contacts, the power supply, the alarm transmitter, and the buzzer form a power circuit. The alarm transmitter sends alarm data, and the buzzer sounds to remind nearby people of the theft of electricity.

[0035] When the alarm needs to be deactivated, the electromagnet is activated to attract the wedge-shaped carbon steel lock to release the fastener. Then, the anti-theft cover and linkage rod are manually reset. At this time, the above-mentioned power circuit is disconnected and the alarm is automatically deactivated.

[0036] When the lock is unlocked normally, the first permanent magnet will maintain its magnetic attraction to the second permanent magnet, and the L-shaped lock bar will not fall down. The test can be performed after the door is opened.

[0037] Compared with the prior art, the present invention has the following advantages:

[0038] In addition to using ordinary locks for protection, this invention features three layers of protection. The first layer uses an L-shaped locking bar and a limit bar to prevent the door from being opened. The second layer involves an anti-theft cover automatically descending and locking after the door is forcibly opened, providing physical isolation protection for the electricity meter. The third layer involves sounding an alarm while the anti-theft cover is locked, alerting nearby personnel to any unauthorized damage and preventing further harm. Through these methods, comprehensive protection can be achieved for the electricity meter inside the cabinet, preventing not only electricity theft but also malicious tampering with the meter's wiring and parameter settings, ensuring normal operation of the monitoring process. Attached Figure Description

[0039] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0040] Figure 1 A 3D view of the cabinet;

[0041] Figure 2 This is the front view of the cabinet;

[0042] Figure 3 This is a structural diagram of the cabinet cavity (some components are omitted).

[0043] Figure 4 This is the left view of the cabinet cavity;

[0044] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0045] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0046] Figure 7 for Figure 4 Top view of the skateboard and security cover;

[0047] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0048] Figure 9 A 3D view of the anti-theft cover;

[0049] Figure 10 This is a schematic diagram of the alarm circuit.

[0050] The reference numerals in the figures include:

[0051] 1. Cabinet body; 2. Door body; 3. First lock body; 4. Cabinet cavity; 5. Meter position; 6. Second lock body; 7. First permanent magnet; 8. Transmission cavity; 9. Second permanent magnet; 10. Slide rod; 11. L-shaped lock bar; 12. First elastic device; 13. Mounting plate; 14. Limiting plate; 15. First reinforcing bar; 16. Second reinforcing bar; 17. Limiting bar; 18. Locking buckle; 19. Limiting piece; 20. Guide rail; 2 1. Slide plate; 22. First limiting groove; 23. Linkage rod; 24. Horizontal plate; 25. Limiting block; 26. Second elastic device; 27. Extension plate; 28. Second limiting groove; 29. ​​Anti-theft cover; 30. Stop plate; 31. Fastener; 32. Locking channel; 33. Locking cavity; 34. Electromagnet; 35. Wedge-shaped carbon steel lock; 36. Third elastic device; 37. Conductive spring; 38. Fourth elastic device. Detailed Implementation

[0052] 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.

[0053] In the description of this invention, it should be noted that the terms "vertical," "upper," "lower," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0055] A method for testing smart energy meters based on an alarm system, which uses a field calibrator to calibrate smart energy meters installed in a metering cabinet.

[0056] like Figures 1 to 3 The metering cabinet includes a cabinet body 1, the surface of which is coated with anti-corrosion paint. Inside the cabinet body 1 is a cabinet cavity 4, which contains multiple meter positions 5 for installing smart energy meters. A door 2 is rotatably connected to the front of the cabinet body 1. A first lock body 3 is installed on the top of the door 2, and a second lock body 6 is installed on the top of the cabinet body 1. The first lock body 3 and the second lock body 6 cooperate to form a lock.

[0057] The metering cabinet is equipped with a protective mechanism and an alarm system triggered by the protective mechanism.

[0058] Specifically, such as Figure 4 and Figure 5 The protective mechanism includes a first permanent magnet 7, a second permanent magnet 9, a slide bar 10, an L-shaped locking bar 11, a first elastic device 12, a mounting plate 13, and a limiting bar 17.

[0059] The first permanent magnet 7 is installed in the first lock body 3, and the second permanent magnet 9 is located at the top of the transmission cavity 8 of the door body 2 and attracts the first permanent magnet 7. The slide rod 10 moves up and down along the transmission cavity 8 and its upper end is fixedly connected to the second permanent magnet 9. The lower end of the slide rod 10 is equipped with the L-shaped lock bar 11, and the lower end of the L-shaped lock bar 11 is connected to the door body 2 through the first elastic device 12. The first elastic device 12 is used to drive the L-shaped lock bar 11 and the slide rod 10 to move downward.

[0060] The inner end of the L-shaped locking bar 11 extends into the cabinet body 1 and is connected to a vertically downward limiting protrusion. The mounting plate 13 is installed at the bottom of the top plate of the cabinet body 1, and the limiting bar 17 is installed on the mounting plate 13 by a sliding fit to achieve forward and backward movement relative to the cabinet body 1. The outer end of the limiting bar 17 is provided with an upward-facing latch 18, which is located below the front side of the limiting protrusion.

[0061] A limiting plate 14 is also fixed on the mounting plate 13. The limiting plate 14 is located in front of the limiting piece 19 connected to the inner end of the limiting strip 17.

[0062] Furthermore, a first reinforcing strip 15 is fixedly connected between the mounting plate 13 and the top plate of the cabinet 1, and a second reinforcing strip 16 is fixedly connected between the limiting plate 14 and the top plate of the cabinet 1.

[0063] like Figures 4 to 9 The protective mechanism also includes an anti-theft cover 29, a stop plate 30, and two sliding plates 21. The two sliding plates 21 are located on the left and right sides of the area where the meter position 5 is located, and are slidably connected to the back panel of the cabinet 1 via guide rails 20. The anti-theft cover 29 is made of carbon steel, and its two ends are connected to the two sliding plates 21 respectively, so as to move up and down relative to the cabinet 1 with the sliding plates 21.

[0064] like Figure 6 The rear end of the limiting strip 17 is inserted into the first limiting groove 22 opened on the sliding plate 21 to prevent the anti-theft cover 29 from falling.

[0065] like Figure 7 The two ends of the anti-theft cover 29 are connected to the corresponding side slide plate 21 by sliding to achieve forward and backward movement relative to the slide plate 21. A fourth elastic device 38 is also connected between the end of the anti-theft cover 29 and the corresponding side slide plate 21. The fourth elastic device 38 is used to drive the anti-theft cover 29 to move towards the back panel of the cabinet 1.

[0066] like Figure 4 The stop plate 30 is located below the area where the position 5 is located.

[0067] like Figures 7 to 9 The protective mechanism also includes two sets of locking mechanisms located on the back panel of cabinet 1. When the anti-theft cover 29 falls onto the stop plate 30, the fasteners 31 extending backward at both ends of the anti-theft cover 29 correspond to the two locking mechanisms and are inserted into the locking mechanisms under the drive of the fourth elastic device 38 to lock the anti-theft cover 29.

[0068] The protective mechanism also includes a temporary positioning mechanism to ensure that the backward movement only begins after the anti-theft cover 29 has been lowered.

[0069] like Figure 4 and Figure 6 The temporary positioning mechanism includes a linkage rod 23, a second elastic device 26, an extension plate 27, a horizontal plate 24, and a limiting block 25.

[0070] The extension plate 27 is fixed to the top wall of the anti-theft cover 29, and a second limiting groove 28 is provided on the top of the extension plate 27.

[0071] The linkage rod 23 is slidably connected to one of the slide plates 21 to achieve vertical movement relative to the slide plate 21. The lower end of the linkage rod 23 protrudes from the bottom of the slide plate 21 and the anti-theft cover 29 and is used to contact the stop plate 30. The upper end of the linkage rod 23 is connected to the horizontal plate 24, which is connected to the slide plate 21 via a second elastic device 26 and is also connected to the limiting block 25. The second elastic device 26 is used to drive the linkage rod 23 to move downward so that the limiting block 25 is inserted into the second limiting groove 28.

[0072] like Figure 7 and Figure 8 The locking mechanism includes a third elastic device 36 and a wedge-shaped carbon steel lock 35 installed in the locking cavity 33 on the back panel of the cabinet 1.

[0073] The locking cavity 33 is connected to the cabinet cavity 4 through the locking channel 32. The wedge-shaped carbon steel lock 35 is slidably installed on the inner wall of the locking cavity 33 in the left-right or up-down direction. The wedge-shaped carbon steel lock 35 is connected to the inner wall of the locking cavity 33 through the third elastic device 36. The third elastic device 36 is used to drive the wedge-shaped carbon steel lock 35 to contact the inserted fastener 31 to lock the anti-theft cover 29.

[0074] An electromagnet 34 is also installed in the locking cavity 33, which is used to attract the wedge-shaped carbon steel lock 35 away from the fastener 31 under the control of the control module to complete the unlocking of the fastener 31.

[0075] like Figure 10 The alarm system includes a power supply, an alarm transmitter, a buzzer, and conductive spring contacts 37 located in two locking cavities 33. The conductive spring contacts 37 are used to contact inserted fasteners 31. The two fasteners 31 are made of conductive material and are electrically connected to each other, thus forming a conductive path with the two conductive spring contacts 37. The power supply, alarm transmitter, and buzzer are connected in series between the two conductive spring contacts 37.

[0076] The steps of the smart energy meter detection method are as follows:

[0077] Step S1: Check the on-site calibration instrument.

[0078] Step S2: Unlock the lock, open the door 2, check whether the wiring of the smart energy meter inside is correct and secure, and then connect the field calibrator to the same power circuit as the smart energy meter to be tested.

[0079] Step S3: Start the connected power circuit and record the readings of the smart energy meter and the field calibrator under different operating conditions. The different operating conditions include low load test condition, high load test condition, sinusoidal load condition, and non-sinusoidal load condition.

[0080] Step S4: Calibrate the smart energy meter under test based on the reading difference.

[0081] Step S5: Repeat steps S2 to S4 multiple times for testing and calibration.

[0082] When the lock is forcibly opened, it will trigger a protective mechanism to prevent unauthorized personnel from operating the smart meter. If unauthorized personnel attempt to damage the protective mechanism, it will take further protective actions and trigger the alarm system.

[0083] Specifically, when the lock is forcibly opened, the vibration of the lock will cause the second permanent magnet 9 to break free from the attraction of the first permanent magnet 7 and fall off. The L-shaped lock bar 11 moves downward under the action of the first elastic device 12. The inner end of the L-shaped lock bar 11 is engaged with the latch 18. If the door 2 is opened at this time, the L-shaped lock bar 11 will pull the limiting bar 17 to move horizontally until the limiting piece 19 and the limiting plate 14 abut against each other, thereby preventing the door 2 from being opened.

[0084] If door 2 continues to be forcibly opened, the rear end of the limiting strip 17 will leave the first limiting groove 22, and the sliding plate 21 and the anti-theft cover 29 will begin to fall until the anti-theft cover 29 lands on the stop plate 30. After the linkage rod 23 touches the stop plate 30, the linkage rod 23 will move upward relative to the sliding plate 21, causing the limiting block 25 to disengage from the second limiting groove 28, releasing the limitation on the extension plate 27 and the anti-theft cover 29. Under the elastic force of the fourth elastic device 38, the anti-theft cover 29 moves towards the back panel of the cabinet 1, and the two fasteners... The fasteners 31 pass through the locking channel 32 and enter the locking cavity 33. The fastener 31 first pushes the wedge-shaped carbon steel lock 35 to the side, overcoming the elastic force of the third elastic device 36. After the fastener 31 and the conductive spring 37 abut against each other, the fastener 31 no longer obstructs the wedge-shaped carbon steel lock 35, which will then reset under the action of the third elastic device 36. This achieves locking of the fastener 31 and the anti-theft cover 29, preventing the anti-theft cover 29 from being moved and protecting the smart energy meter on the meter position 5 covered by the anti-theft cover 29. At this time, the two fasteners 31, the two conductive springs 37, the power supply, the alarm transmitter, and the buzzer form a power circuit. The alarm transmitter sends alarm data, and the buzzer sounds to alert nearby personnel to the theft of electricity.

[0085] When the alarm needs to be deactivated, the electromagnet 34 is activated to attract the wedge-shaped carbon steel lock 35 to release the lock on the buckle 31. Then, the anti-theft cover 29 and the linkage rod 23 are manually reset. At this time, the above-mentioned power circuit is disconnected and the alarm is automatically deactivated.

[0086] When the lock is unlocked normally, the first permanent magnet 7 will maintain its magnetic attraction to the second permanent magnet 9, and the L-shaped lock bar 11 will not fall down. The test can be performed after the door 2 is opened.

[0087] It should be noted that, as will be apparent to those skilled in the art, the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics thereof. The scope of the present invention is defined by the claims rather than the foregoing description.

[0088] The components, modules, mechanisms, and devices in this invention that are not described in detail are all general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A method for testing smart energy meters based on an alarm system, wherein a field calibrator is used to calibrate smart energy meters installed in a metering cabinet; the metering cabinet includes a cabinet body (1), a cabinet cavity (4) inside the cabinet body (1), a meter position (5) for installing smart energy meters in the cabinet cavity (4), a door body (2) rotatably connected to the front side of the cabinet body (1), a first lock body (3) installed on the top of the door body (2), and a second lock body (6) installed on the top of the cabinet body (1), the first lock body (3) and the second lock body (6) cooperating with each other to form a lock, characterized in that: The metering cabinet is equipped with a protective mechanism and an alarm system triggered by the protective mechanism; The steps of the smart energy meter testing method are as follows: Step S1: Check the on-site calibration instrument; Step S2: Unlock the lock, open the door (2), check whether the wiring of the smart energy meter inside is correct and secure, and then connect the field calibrator so that the field calibrator and the smart energy meter to be tested are connected to the same power circuit. Step S3: Start the connected power circuit and record the readings of the smart energy meter and the field calibrator under different operating conditions; Step S4: Calibrate the smart energy meter under test according to the reading difference; Step S5: Repeat steps S2 to S4 multiple times for testing and calibration; When the lock is forcibly opened, it will trigger the protective mechanism to prevent unauthorized personnel from operating the smart meter; if unauthorized personnel attempt to damage the protective mechanism, the mechanism will take further protective actions and trigger the alarm system. The protective mechanism includes a first permanent magnet (7), a second permanent magnet (9), a slide bar (10), an L-shaped locking bar (11), a first elastic device (12), a mounting plate (13), and a limiting bar (17). The first permanent magnet (7) is installed in the first lock body (3), and the second permanent magnet (9) is located at the top of the transmission cavity (8) of the door body (2) and attracts the first permanent magnet (7); the slide rod (10) moves up and down along the transmission cavity (8) and its upper end is fixedly connected to the second permanent magnet (9); the lower end of the slide rod (10) is equipped with the L-shaped lock bar (11), and the lower end of the L-shaped lock bar (11) is connected to the door body (2) through the first elastic device (12). The first elastic device (12) is used to drive the L-shaped lock bar (11) and the slide rod (10) to move downward. The inner end of the L-shaped locking bar (11) extends into the cabinet (1) and is connected to a vertically downward limiting protrusion; the mounting plate (13) is installed at the bottom of the top plate of the cabinet (1), and the limiting bar (17) is installed on the mounting plate (13) by sliding fit to realize forward and backward movement relative to the cabinet (1); the outer end of the limiting bar (17) is provided with an upward locking buckle (18), and the locking buckle (18) is located below the front side of the limiting protrusion; A limiting plate (14) is also fixed on the mounting plate (13). The limiting plate (14) is located in front of the limiting piece (19) connected to the inner end of the limiting strip (17). The protective mechanism also includes an anti-theft cover (29), a stop plate (30), and two sliding plates (21); the two sliding plates (21) are located on the left and right sides of the area where the meter position (5) is located, and are slidably connected to the back panel of the cabinet (1) through guide rails (20); the two ends of the anti-theft cover (29) are connected to the two sliding plates (21) respectively, so as to follow the sliding plates (21) to move up and down relative to the cabinet (1); The rear end of the limiting strip (17) is inserted into the first limiting groove (22) opened on the sliding plate (21) to prevent the anti-theft cover (29) from falling; The two ends of the anti-theft cover (29) are connected to the corresponding side slide plate (21) by sliding to realize the forward and backward movement relative to the slide plate (21). A fourth elastic device (38) is also connected between the end of the anti-theft cover (29) and the corresponding side slide plate (21). The fourth elastic device (38) is used to drive the anti-theft cover (29) to move towards the back panel of the cabinet (1). The stop plate (30) is located below the area where the position (5) is located; The protective mechanism also includes two sets of locking mechanisms located on the back panel of the cabinet (1); when the anti-theft cover (29) falls onto the stop plate (30), the fasteners (31) extending backward at both ends of the anti-theft cover (29) correspond to the two locking mechanisms and are inserted into the locking mechanism under the drive of the fourth elastic device (38) to lock the anti-theft cover (29).

2. The smart energy meter detection method based on an alarm system as described in claim 1, characterized in that: The different operating conditions include low load test conditions, high load test conditions, sinusoidal load conditions, and non-sinusoidal load conditions.

3. The smart energy meter detection method based on an alarm system as described in claim 1, characterized in that: A first reinforcing strip (15) is fixed between the mounting plate (13) and the top plate of the cabinet (1), and a second reinforcing strip (16) is fixed between the limiting plate (14) and the top plate of the cabinet (1).

4. The smart energy meter detection method based on an alarm system as described in claim 1, characterized in that: The protective mechanism also includes a temporary positioning mechanism, which includes a linkage rod (23), a second elastic device (26), an extension plate (27), a horizontal plate (24), and a limiting block (25). The extension plate (27) is fixed to the top wall of the anti-theft cover (29), and a second limiting groove (28) is provided on the top of the extension plate (27). The linkage rod (23) is slidably connected to one of the slide plates (21) to achieve up and down movement relative to the slide plate (21). The lower end of the linkage rod (23) protrudes from the bottom of the slide plate (21) and the anti-theft cover (29) and is used to contact the stop plate (30). The upper end of the linkage rod (23) is connected to the horizontal plate (24). The horizontal plate (24) is connected to the slide plate (21) through the second elastic device (26) and is also connected to the limiting block (25). The second elastic device (26) is used to drive the linkage rod (23) to move downward so that the limiting block (25) is inserted into the second limiting groove (28).

5. The smart energy meter detection method based on an alarm system as described in claim 1 or 4, characterized in that: The locking mechanism includes a third elastic device (36) and a wedge-shaped carbon steel lock (35) installed in the locking cavity (33) of the back panel of the cabinet (1). The locking cavity (33) is connected to the cabinet cavity (4) through the locking channel (32). The wedge-shaped carbon steel lock (35) is slidably installed on the inner wall of the locking cavity (33) in the left-right or up-down direction. The wedge-shaped carbon steel lock (35) is connected to the inner wall of the locking cavity (33) through the third elastic device (36). The third elastic device (36) is used to drive the wedge-shaped carbon steel lock (35) to contact the inserted fastener (31) to lock the anti-theft cover (29). An electromagnet (34) is also installed in the locking cavity (33) to attract the wedge-shaped carbon steel lock (35) away from the fastener (31) under the control of the control module in order to unlock the fastener (31).

6. The smart energy meter detection method based on an alarm system as described in claim 5, characterized in that: The alarm system includes a power supply, an alarm transmitter, a buzzer, and conductive springs (37) located in two locking cavities (33). The conductive springs (37) are used to contact the inserted fasteners (31). The two fasteners (31) are made of conductive material and are electrically connected to each other, thereby forming a conductive path with the two conductive springs (37). The power supply, alarm transmitter, and buzzer are connected in series between two conductive springs (37).

7. The smart energy meter detection method based on an alarm system as described in claim 6, characterized in that: When the lock is forcibly opened, the vibration of the lock will cause the second permanent magnet (9) to break free from the attraction of the first permanent magnet (7) and fall off. The L-shaped lock bar (11) moves downward under the action of the first elastic device (12). The inner end of the L-shaped lock bar (11) is engaged with the latch (18). If the door (2) is opened at this time, the L-shaped lock bar (11) will pull the limit bar (17) to move horizontally until the limit plate (19) and the limit plate (14) abut against each other, thereby preventing the door (2) from being opened. If the door (2) continues to be forcibly opened, the rear end of the limiting strip (17) will leave the first limiting groove (22), the sliding plate (21) and the anti-theft cover (29) will begin to fall until the anti-theft cover (29) falls on the stop plate (30), and after the linkage rod (23) touches the stop plate (30), the linkage rod (23) will move upward relative to the sliding plate (21), causing the limiting block (25) to disengage from the second limiting groove (28), releasing the limitation on the extension plate (27) and the anti-theft cover (29). The anti-theft cover (29) moves towards the back panel of the cabinet (1) under the elastic force of the fourth elastic device (38), and the two fasteners (31) pass through the locking channel (32) and enter the locking cavity (33) respectively. The fasteners (31) first Pushing the wedge-shaped carbon steel lock (35) to overcome the elastic force of the third elastic device (36) and move it to the side, after the buckle (31) and the conductive spring (37) abut against each other, the buckle (31) no longer blocks the wedge-shaped carbon steel lock (35), and the wedge-shaped carbon steel lock (35) will be reset under the action of the third elastic device (36), thereby locking the buckle (31) and the anti-theft cover (29), preventing the anti-theft cover (29) from being moved, and protecting the smart energy meter on the meter position (5) covered by the anti-theft cover (29); at this time, the two buckles (31), the two conductive springs (37), the power supply, the alarm transmitter and the buzzer form a power circuit, the alarm transmitter sends alarm data, and the buzzer sounds to remind nearby people of the theft of electricity; When the alarm needs to be cleared, control the electromagnet (34) to attract the wedge-shaped carbon steel lock (35) to release the lock on the buckle (31), and then manually reset the anti-theft cover (29) and the linkage rod (23). At this time, the above-mentioned power circuit is disconnected and the alarm is automatically cleared. When the lock is unlocked normally, the first permanent magnet (7) will maintain its magnetic attraction to the second permanent magnet (9), and the L-shaped lock bar (11) will not fall. The test can be performed after the door (2) is opened.

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