A three-phase guide rail type electric energy meter calibrating device

Abstract

This invention relates to the field of electricity meter calibration technology and discloses a three-phase rail-mounted electricity meter calibration device, comprising: a waveform generation and optimization module, a multi-communication intelligent switching module, an adjustable meter mounting bracket, and a remote measurement and control upgrade module. The remote measurement and control upgrade module establishes bidirectional data transmission connections with the waveform generation and optimization module, the multi-communication intelligent switching module, and the adjustable meter mounting bracket. The waveform generation and optimization module integrates an adaptive harmonic superposition unit, a harmonic waveform self-calibration unit, and an IR46 waveform customization library unit. The multi-communication intelligent switching module integrates a multi-channel communication matrix unit, a communication redundancy backup unit, and a communication rate adaptive adjustment unit. This invention, through multi-module integration and collaboration, precise waveform generation optimization, intelligent and stable communication transmission, and meter mounting measurement and control upgrade design, achieves intelligent operation of the entire calibration process, improves waveform accuracy and device versatility, and solves the problems of poor linkage and low calibration efficiency in traditional devices.

Description

Technical Field

[0001] This invention relates to the field of electricity meter calibration technology, specifically to a three-phase rail-mounted electricity meter calibration device. Background Technology

[0002] The three-phase rail-mounted energy meter calibration device is a specialized equipment for conducting metrological performance verification and functional tests on three-phase rail-mounted energy meters. It is widely used in power production, metrological verification and other related work, and is an important supporting device to ensure the accuracy of power metering data and the qualification of energy meter equipment.

[0003] The existing verification devices of this type have their functional components distributed in a decentralized manner, and the components can only achieve basic signal transmission, making it difficult to form efficient linkage. The industry often tries to make up for the lack of linkage by adding manual measurement and control links, but this results in low intelligence of device measurement and control, cumbersome verification operation process and low overall efficiency. The waveform generation-related functional components can only achieve fixed types of harmonic superposition and cannot adjust waveform parameters according to verification requirements. Some devices meet some verification requirements by manually setting waveform parameters, but this is prone to waveform parameter matching deviation, resulting in high waveform distortion and difficulty in meeting the requirements of accurate verification. The switching of communication-related components requires manual plugging and unplugging operations, and there is no effective fault backup design. In practical applications, the impact of communication failures is often reduced by increasing the frequency of manual inspections, which not only increases labor costs, but also easily leads to communication interruption due to untimely inspections, directly affecting the continuity of verification work. To address this, a three-phase rail-mounted energy meter verification device is proposed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a three-phase rail-mounted energy meter calibration device to solve the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a three-phase rail-mounted energy meter calibration device, comprising: The system includes a waveform generation and optimization module, a multi-communication intelligent switching module, an adjustable meter holder, and a remote measurement and control upgrade module. The waveform generation and optimization module is electrically connected to the multi-communication intelligent switching module, and both of them achieve bidirectional signal interaction with the adjustable meter holder. The remote measurement and control upgrade module establishes bidirectional data transmission connections with the waveform generation and optimization module, the multi-communication intelligent switching module, and the adjustable meter holder, respectively. The waveform generation and optimization module integrates an adaptive harmonic superposition unit, a harmonic waveform self-calibration unit, and an IR46 waveform customization library unit. The multi-communication intelligent switching module integrates a multi-channel communication matrix unit, a communication redundancy backup unit, and a communication rate adaptive adjustment unit. The adjustable meter holder adopts a modular slide rail structure, and the remote monitoring and control upgrade module integrates an Internet of Things unit and a cloud data management platform unit. The modules work together to achieve intelligent control of the entire verification process, effectively improving the flexibility and accuracy of waveform generation, enabling intelligent switching and stable transmission of communication links, enhancing the device's adaptability to different models of rail meters, breaking the geographical limitations of local measurement and control, realizing remote management and traceability of verification data, and improving the overall efficiency and quality of three-phase rail meter verification, adapting to the diverse verification needs of new rail meters.

[0006] Preferably, the adaptive harmonic superposition unit of the waveform generation optimization module is electrically connected to the harmonic waveform self-calibration unit, the harmonic waveform self-calibration unit establishes bidirectional data interaction with the IR46 waveform customization library unit, the adaptive harmonic superposition unit receives the model information of the meter under test and automatically matches the harmonic parameters, and transmits the generated harmonic waveform data to the harmonic waveform self-calibration unit.

[0007] Preferably, the harmonic waveform self-calibration unit of the waveform generation optimization module is externally connected to a waveform detection element. The harmonic waveform self-calibration unit receives the distortion detection data from the waveform detection element, automatically compensates the harmonic waveform through digital amplitude modulation and phase modulation, and feeds back the compensated waveform data to the adaptive harmonic superposition unit.

[0008] Preferably, the multi-channel communication matrix unit of the multi-communication intelligent switching module is electrically connected to the communication redundancy backup unit, the communication redundancy backup unit establishes bidirectional data transmission with the communication rate adaptive adjustment unit, and the multi-channel communication matrix unit integrates multiple sets of HPLC carrier interfaces and multiple types of communication interfaces.

[0009] Preferably, the communication rate adaptive adjustment unit of the multi-communication intelligent switching module has a built-in communication protocol matching program. The communication rate adaptive adjustment unit receives communication interaction data from the multi-channel communication matrix unit, matches the optimal communication rate according to the communication protocol, and sends a rate adjustment command to the multi-channel communication matrix unit.

[0010] Preferably, the IR46 waveform customization library unit of the waveform generation optimization module is a read-write storage unit. The IR46 waveform customization library unit receives non-standard distorted waveform data from the adaptive harmonic superposition unit and saves the template, while providing pre-stored waveform template data to the adaptive harmonic superposition unit. The waveform detection element is a high-precision distortion sensor, which is externally connected to the harmonic waveform self-calibration unit via a signal cable to collect waveform distortion data in real time; the IR46 waveform customization library unit is a flash memory read and write storage unit that receives non-standard distorted waveform data and saves it according to template format; the pre-stored waveform templates can be directly retrieved and adjusted as needed by the adaptive harmonic superposition unit. The harmonic waveform self-calibration unit connects to an external waveform detection element and compensates for distortion through digital amplitude and phase modulation, resulting in waveform accuracy far exceeding that of traditional devices. The adaptive harmonic superposition unit can automatically match harmonic parameters without manual setting. The IR46 waveform customization library unit's read / write storage function supports the saving and retrieval of templates for non-standard distorted waveforms, meeting the personalized harmonic testing needs of different models of instruments under test. This solves the problems of limited harmonic superposition and high waveform distortion in traditional devices, improving the flexibility and accuracy of waveform verification.

[0011] Preferably, the modular sliding rail structure of the adjustable watch holder includes an outer frame, an upper rail, a lower rail, and an adjusting screw. The upper rail and the lower rail are installed inside the outer frame, and both ends of the upper rail and the lower rail are slidably connected to the inner wall of the outer frame.

[0012] Preferably, the adjusting screw is rotatably mounted on the top of the upper rail, and the adjusting screw passes through the outer frame. The adjusting screw and the outer frame are connected by a threaded connection.

[0013] Preferably, the outer frame is provided with limit blocks on both sides of the top of the lower rail, and the limit blocks are integrally formed with the outer frame. The bottom of the lower rail is provided with three equidistant elastic reset members, and the two ends of the elastic reset members are welded and fixed to the lower rail and the outer frame respectively. The end of the adjusting screw is equipped with a rotating handwheel. When rotated, the upper rail slides up and down along the inner wall of the outer frame through the threaded engagement. The elastic reset component is a compression spring, which always provides elastic support to the lower rail. The limit block restricts the upward sliding stroke of the lower rail. The relative sliding of the upper and lower rails realizes the precise adjustment of the gauge position distance, which is suitable for measuring instruments of different sizes. The outer frame, upper rail, and lower rail work together with the adjusting screw to achieve precise adjustment of the meter spacing. The limit block and elastic reset component ensure the stability and safety of the adjustment process. Compared with traditional fixed-size meter racks, this structure can be adapted to three-phase rail-mounted energy meters of different sizes. Multiple models of meters can be calibrated without changing the meter rack. The elastic support of the elastic reset component makes the meter body more securely attached, greatly improving the versatility of the meter rack and the convenience of the calibration operation.

[0014] Preferably, the IoT unit of the remote measurement and control upgrade module establishes wireless two-way data transmission with the cloud data management platform unit. The IoT unit integrates a power outage calibration data storage element, which is used to store calibration process parameters. The cloud data management platform unit has the functions of remote viewing, remote operation, data uploading, data synchronization and data traceability of the calibration process. The power failure calibration data storage element is a non-volatile memory chip integrated on the main control board of the IoT unit. When the device is powered off, it stores the calibration process parameters of each module in real time. The cloud data management platform unit is a hardware and software integrated platform built on a cloud server. It supports access from web and mobile terminals and can directly issue remote operation commands to each module of the device. The IoT unit integrates a power-off calibration data storage element, which can completely save the calibration process parameters when the device is powered off and directly retrieve them after power is restored, avoiding the problem of recalibration after power failure in traditional devices. The wireless two-way transmission between the IoT unit and the cloud data management platform unit enables remote viewing, operation, and data uploading of the calibration process. Data synchronization and traceability functions ensure that calibration data is fully documented, solving the problems of traditional devices that only support local measurement and control and have low data management efficiency, thus improving the flexibility of calibration work and the standardization of data management.

[0015] Compared with the prior art, the present invention provides a three-phase rail-mounted energy meter calibration device, which has the following advantages: This invention integrates core modules such as a waveform generation optimization module and a multi-communication intelligent switching module, and establishes a collaborative architecture with electrical connection and bidirectional data transmission. This achieves efficient linkage and data interoperability between modules, offering the advantages of system integration and intelligent measurement and control, and solving the problems of scattered modules and poor linkage in traditional devices. By integrating units such as an adaptive harmonic superposition unit into the waveform generation optimization module, it realizes the generation and precise calibration of personalized harmonic waveforms, offering the advantages of flexible and high-precision waveform generation, and solving the problems of limited harmonic superposition and high waveform distortion in traditional devices. By integrating multi-channel communication matrix units and other units through the multi-communication intelligent switching module, automatic identification of communication types and stable transmission are realized. It has the advantages of convenient communication switching and high reliability, and solves the problems of cumbersome communication switching and lack of redundant backup in traditional devices. Through the matching design of the adjustable meter rack and the remote measurement and control upgrade module, the device achieves adaptation to multiple meter models and remote control of the calibration process. It has the advantages of strong device versatility and wide measurement and control range, and solves the problems of poor meter compatibility and only supporting local measurement and control of traditional devices. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall system architecture of the present invention; Figure 2This is a diagram illustrating the internal composition and interaction logic of the core module of this invention. Figure 3 This is a perspective view of the adjustable watch holder structure of the present invention.

[0017] In the diagram: 1. Adaptive harmonic superposition unit; 2. Harmonic waveform self-calibration unit; 3. IR46 waveform customization library unit; 4. Multi-channel communication matrix unit; 5. Communication redundancy backup unit; 6. Communication rate adaptive adjustment unit; 7. Internet of Things unit; 8. Cloud data management platform unit; 9. Outer frame; 10. Upper rail; 11. Lower rail; 12. Adjusting screw; 13. Limit block; 14. Elastic reset component. Detailed Implementation

[0018] 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.

[0019] This invention provides a technical solution: a calibration device for a three-phase rail-mounted energy meter. Please refer to [link / reference]. Figure 1 , Figure 2 and Figure 3 ,include: The system includes a waveform generation and optimization module, a multi-communication intelligent switching module, an adjustable meter holder, and a remote measurement and control upgrade module. The waveform generation and optimization module is electrically connected to the multi-communication intelligent switching module, and both of them achieve bidirectional signal interaction with the adjustable meter holder. The remote measurement and control upgrade module establishes bidirectional data transmission connections with the waveform generation and optimization module, the multi-communication intelligent switching module, and the adjustable meter holder, respectively. The waveform generation and optimization module integrates an adaptive harmonic superposition unit 1, a harmonic waveform self-calibration unit 2, and an IR46 waveform customization library unit 3. The multi-communication intelligent switching module integrates a multi-channel communication matrix unit 4, a communication redundancy backup unit 5, and a communication rate adaptive adjustment unit 6. The adjustable meter holder adopts a modular slide rail structure, and the remote monitoring and control upgrade module integrates an IoT unit 7 and a cloud data management platform unit 8; The adaptive harmonic superposition unit 1 receives the model information of the meter under test from the adjustable meter holder, automatically matches the harmonic parameters to generate a waveform and transmits it to the harmonic waveform self-calibration unit 2; the multi-channel communication matrix unit 4 identifies the communication type of the meter under test through the adjustable meter holder; the Internet of Things unit 7 synchronizes the data of all modules of the device to the cloud data management platform unit 8 through a wireless link; the electrical connection and signal interaction of each module are realized through the main control line built into the device to achieve data transmission and command issuance. Through the coordinated operation of waveform generation optimization module, multi-communication intelligent switching module, adjustable meter mount, and remote measurement and control upgrade module, a functional closed-loop calibration system is constructed. The integrated design of core units such as adaptive harmonic superposition unit 1 and multi-channel communication matrix unit 4 enables the device to have waveform customization, intelligent communication, meter mount adaptation, and remote measurement and control functions. The electrical connection and bidirectional interaction of each module ensure the real-time data transmission. From the system level, this solves the problems of single function and poor module linkage of traditional devices, and significantly improves the intelligence and integration level of the device.

[0020] Please see Figure 1 and Figure 2 The adaptive harmonic superposition unit 1 of the waveform generation and optimization module is electrically connected to the harmonic waveform self-calibration unit 2. The harmonic waveform self-calibration unit 2 establishes bidirectional data interaction with the IR46 waveform customization library unit 3. The adaptive harmonic superposition unit 1 receives the model information of the meter under test and automatically matches the harmonic parameters, transmitting the generated harmonic waveform data to the harmonic waveform self-calibration unit 2. The harmonic waveform self-calibration unit 2 of the waveform generation and optimization module is externally connected to a waveform detection element. The harmonic waveform self-calibration unit 2 receives the distortion detection data from the waveform detection element, automatically compensates for the harmonic waveform through digital amplitude modulation and phase modulation, and feeds back the compensated waveform data to the adaptive harmonic superposition unit 1. The multi-channel communication matrix unit 4 of the multi-communication intelligent switching module is electrically connected to the communication redundancy backup unit 5. The communication redundancy backup unit 5 establishes bidirectional data transmission with the communication rate adaptive adjustment unit 6. The multi-channel communication matrix unit 4 integrates multiple sets of HPLC carrier interfaces and multiple types of communication interfaces. The communication rate adaptive adjustment unit 6 of the multi-communication intelligent switching module has a built-in communication protocol matching program. The communication rate adaptive adjustment unit 6 receives communication interaction data from the multi-channel communication matrix unit 4, matches the optimal communication rate according to the communication protocol, and sends a rate adjustment command to the multi-channel communication matrix unit 4. The IR46 waveform customization library unit 3 of the waveform generation optimization module is a read-write storage unit. The IR46 waveform customization library unit 3 receives non-standard distorted waveform data from the adaptive harmonic superposition unit 1 and saves it as a template. At the same time, it provides pre-stored waveform template data to the adaptive harmonic superposition unit 1. The waveform detection element is a high-precision distortion sensor, which is externally connected to the harmonic waveform self-calibration unit 2 via a signal cable to collect waveform distortion data in real time; the IR46 waveform customization library unit 3 is a flash memory read and write storage unit that receives non-standard distorted waveform data and saves it according to template format. The pre-stored waveform templates can be directly retrieved and adjusted as needed by the adaptive harmonic superposition unit 1. The harmonic waveform self-calibration unit 2 connects to an external waveform detection element and compensates for distortion through digital amplitude and phase modulation, resulting in waveform accuracy far exceeding that of traditional devices. The adaptive harmonic superposition unit 1 can automatically match harmonic parameters without manual setting. The IR46 waveform customization library unit 3 has read and write storage functions, supporting the saving and retrieval of templates for non-standard distorted waveforms, meeting the personalized harmonic testing needs of different models of instruments under test. This solves the problems of limited harmonic superposition and high waveform distortion in traditional devices, improving the flexibility and accuracy of waveform verification.

[0021] Please see Figure 1 and Figure 3 The modular sliding rail structure of the adjustable watch holder includes an outer frame 9, an upper rail 10, a lower rail 11, and an adjusting screw 12. The upper rail 10 and the lower rail 11 are installed inside the outer frame 9. Both ends of the upper rail 10 and the lower rail 11 are slidably connected to the inner wall of the outer frame 9. The adjusting screw 12 is rotatably set on the top of the upper rail 10 and passes through the outer frame 9. The adjusting screw 12 is connected to the outer frame 9 by a threaded engagement. Limiting blocks 13 are provided on both sides of the top of the lower rail 11 inside the outer frame 9. The limiting blocks 13 are integrally formed with the outer frame 9. Three equidistant elastic reset members 14 are provided at the bottom of the lower rail 11. Both ends of the elastic reset members 14 are welded and fixed to the lower rail 11 and the outer frame 9, respectively. The end of the adjusting screw 12 is equipped with a rotating handwheel. When rotating, the upper rail 10 is driven to slide up and down along the inner wall of the outer frame 9 through the threaded engagement. The elastic reset component 14 is a compression spring that always provides elastic support force to the lower rail 11. The limit block 13 restricts the upward sliding stroke of the lower rail 11. The relative sliding of the upper rail 10 and the lower rail 11 realizes the precise adjustment of the gauge position distance and adapts to the gauges of different sizes. The outer frame 9, upper rail 10, and lower rail 11 work together with the adjusting screw 12 to achieve precise adjustment of the meter position spacing. The limit block 13 and the elastic reset component 14 ensure the stability and limit safety of the adjustment process. Compared with the traditional fixed-size meter rack, this structure can be adapted to three-phase rail-mounted energy meters of different sizes. It can complete the verification of multiple models of meters without changing the meter rack. The elastic support of the elastic reset component 14 makes the meter body more securely attached, which greatly improves the versatility of the meter rack and the convenience of the verification operation.

[0022] Please see Figure 1 and Figure 2 The IoT unit 7 of the remote measurement and control upgrade module establishes wireless two-way data transmission with the cloud data management platform unit 8. The IoT unit 7 integrates a power outage and calibration data storage element, which is used to store calibration process parameters. The cloud data management platform unit 8 has the functions of remote viewing, remote operation, data uploading, data synchronization and data traceability of the calibration process. The power failure calibration data storage element is a non-volatile memory chip, integrated on the main control board of IoT unit 7. When the device is powered off, it stores the calibration process parameters of each module in real time. The cloud data management platform unit 8 is a hardware and software integrated platform built on a cloud server. It supports access from web and mobile terminals and can directly issue remote operation commands to each module of the device. The IoT unit 7 integrates a power-off calibration data storage element, which can completely save the calibration process parameters when the device is powered off and directly retrieve them for calibration after power is restored, avoiding the problem of recalibration after power failure in traditional devices. The wireless two-way transmission between the IoT unit 7 and the cloud data management platform unit 8 enables remote viewing, operation, and data uploading of the calibration process. The data synchronization and traceability functions allow for full traceability of calibration data, solving the problems of traditional devices that only support local measurement and control and have low data management efficiency, thus improving the flexibility of calibration work and the standardization of data management.

[0023] This solution: When the device is working, the meter under test is first connected to the adjustable meter holder. The distance between the upper rail 10 and the lower rail 11 is adjusted by adjusting screw 12 to complete the adaptation. The meter holder feeds back the meter model and communication type to the waveform generation and optimization module and the multi-communication intelligent switching module. The adaptive harmonic superposition unit 1 matches the harmonic parameters to generate a waveform. The harmonic waveform self-calibration unit 2 collects the distortion through an external detection element and automatically compensates for it. The IR46 waveform customization library unit 3 stores / retrieves waveform templates as needed. The multi-channel communication matrix unit 4 identifies the communication type and establishes a link. The communication redundancy backup unit 5 ensures the stability of the channel. The communication rate adaptive adjustment unit 6 matches the optimal rate. All data is synchronized to the cloud data management platform unit 8 via the Internet of Things unit 7, supporting remote viewing and operation. The power failure and calibration data storage element of the Internet of Things unit 7 saves parameters when power is lost and resumes calibration directly after power is restored. After the verification is completed, the cloud data management platform unit 8 realizes data traceability.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] 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. A calibration device for a three-phase rail-mounted energy meter, characterized in that, include: The system includes a waveform generation and optimization module, a multi-communication intelligent switching module, an adjustable meter holder, and a remote measurement and control upgrade module. The waveform generation and optimization module is electrically connected to the multi-communication intelligent switching module, and the remote measurement and control upgrade module establishes bidirectional data transmission connections with the waveform generation and optimization module, the multi-communication intelligent switching module, and the adjustable meter holder, respectively. The waveform generation and optimization module integrates an adaptive harmonic superposition unit (1), a harmonic waveform self-calibration unit (2), and an IR46 waveform customization library unit (3). The multi-communication intelligent switching module integrates a multi-channel communication matrix unit (4), a communication redundancy backup unit (5), and a communication rate adaptive adjustment unit (6). The adjustable hanging meter bracket adopts a modular sliding rail structure, and the remote measurement and control upgrade module integrates an Internet of Things unit (7) and a cloud data management platform unit (8).

2. The three-phase rail-mounted energy meter calibration device according to claim 1, characterized in that: The adaptive harmonic superposition unit (1) of the waveform generation optimization module is electrically connected to the harmonic waveform self-calibration unit (2). The harmonic waveform self-calibration unit (2) establishes bidirectional data interaction with the IR46 waveform customization library unit (3). The adaptive harmonic superposition unit (1) receives the model information of the meter under test and automatically matches the harmonic parameters, and transmits the generated harmonic waveform data to the harmonic waveform self-calibration unit (2).

3. The three-phase rail-mounted energy meter calibration device according to claim 1, characterized in that: The harmonic waveform self-calibration unit (2) of the waveform generation optimization module is connected to an external waveform detection element. The harmonic waveform self-calibration unit (2) receives the distortion detection data of the waveform detection element, automatically compensates the harmonic waveform through digital amplitude modulation and phase modulation, and feeds back the compensated waveform data to the adaptive harmonic superposition unit (1).

4. The three-phase rail-mounted energy meter calibration device according to claim 1, characterized in that: The multi-channel communication matrix unit (4) of the multi-communication intelligent switching module is electrically connected to the communication redundancy backup unit (5). The communication redundancy backup unit (5) establishes bidirectional data transmission with the communication rate adaptive adjustment unit (6). The multi-channel communication matrix unit (4) integrates multiple sets of HPLC carrier interfaces and multiple types of communication interfaces.

5. A three-phase rail-mounted energy meter calibration device according to claim 1, characterized in that: The communication rate adaptive adjustment unit (6) of the multi-communication intelligent switching module has a built-in communication protocol matching program. The communication rate adaptive adjustment unit (6) receives the communication interaction data of the multi-channel communication matrix unit (4), matches the optimal communication rate according to the communication protocol, and sends a rate adjustment command to the multi-channel communication matrix unit (4).

6. A three-phase rail-mounted energy meter calibration device according to claim 1, characterized in that: The IR46 waveform customization library unit (3) of the waveform generation optimization module is a read-write storage unit. The IR46 waveform customization library unit (3) receives non-standard distorted waveform data from the adaptive harmonic superposition unit (1) and saves the template. At the same time, it provides pre-stored waveform template data to the adaptive harmonic superposition unit (1).

7. A three-phase rail-mounted energy meter calibration device according to claim 1, characterized in that: The modular sliding rail structure of the adjustable watch holder includes an outer frame (9), an upper rail (10), a lower rail (11) and an adjusting screw (12). The upper rail (10) and the lower rail (11) are installed inside the outer frame (9), and both ends of the upper rail (10) and the lower rail (11) are slidably connected to the inner wall of the outer frame (9).

8. A three-phase rail-mounted energy meter calibration device according to claim 7, characterized in that: The adjusting screw (12) is rotatably mounted on the top of the upper rail (10), and the adjusting screw (12) passes through the outer frame (9). The adjusting screw (12) and the outer frame (9) are connected by a threaded connection.

9. A three-phase rail-mounted energy meter calibration device according to claim 8, characterized in that: Limiting blocks (13) are provided on both sides of the top of the lower rail (11) inside the outer frame (9), and the limiting blocks (13) are integrally formed with the outer frame (9). Three equidistant elastic reset members (14) are provided at the bottom of the lower rail (11), and the two ends of the elastic reset members (14) are welded and fixed to the lower rail (11) and the outer frame (9) respectively.

10. A three-phase rail-mounted energy meter calibration device according to claim 1, characterized in that: The IoT unit (7) of the remote measurement and control upgrade module establishes wireless two-way data transmission with the cloud data management platform unit (8). The IoT unit (7) integrates a power outage calibration data storage element, which is used to store calibration process parameters. The cloud data management platform unit (8) has the functions of remote viewing, remote operation, data uploading, data synchronization and data traceability of the calibration process.

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