Subminiature single-phase guide rail type electric energy meter

Abstract

The utility model relates to a subminiature single-phase guide rail type electric energy meter, and belongs to the field of electric power measurement and energy management. The guide rail structure is arranged at the bottom of the base, the main control chip is installed on the base, a storage module, a metering module, a power management module, an HPLC module, a Bluetooth module and a microprocessor are at least integrated in the main control chip, and the main control chip is powered by an external power module. The main control chip obtains current and voltage information of an external circuit through the signal acquisition module, and the main control chip outputs information through the external communication module and the display panel. The device has the functions of broadband carrier HPLC communication, metering, Bluetooth communication and zero-cross detection, on the basis, the device achieves a smaller volume size, does not occupy too much space, can be laid in a more dense and more complex environment, and still achieves a smaller volume standard after function expansion on the premise of not reducing the use functions of the device.

Description

Technical Field

[0001] The utility model belongs to the field of power measurement and energy management, and relates to a super-small single-phase rail type electric energy meter. Background Technique

[0002] At present, the field of power measurement and energy management is experiencing rapid technological progress and market growth. Power meters are more inclined to accurate measurement and intelligence, and can achieve accurate measurement, data collection and remote monitoring.

[0003] The single-phase rail type electric meter is a new type of electric energy metering device, which is widely used in buildings, shopping malls, convention centers, schools, airports, ports, factories and other places. At present, the rail type electric meter plays an increasingly important role in the modern power system with its characteristics of high precision, easy installation and intelligence. Although its cost is relatively high and certain technical support is required, in high-end users, intelligent homes and rental houses and other occasions, the rail type electric meter still has broad market prospects.

[0004] The existing single-phase rail type is smaller in volume, more intelligent and more convenient to install than the wall-mounted electric meter. However, in order to cope with the increasingly dense high-rise buildings, user groups and the existing large rental housing groups, to achieve a smaller volume, manufacturers often choose to sacrifice its performance, choose a smaller rated current and short-time maximum carrying current, a smaller rail size or reduce its functionality, with only a single screen display, communication method, etc. By this way of emasculating its own functions to reduce the volume and achieve the purpose of not occupying too much space, in order to solve the power management needs of small spaces in individual families and high-density public places. Obviously, this way still has great room for improvement and cannot make customers use and install more conveniently. Content of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide a super-small single-phase rail type electric energy meter.

[0006] To achieve the above purpose, the utility model provides the following technical scheme:

[0007] A super-small single-phase rail type electric energy meter, which includes a base, a housing, a rail structure arranged at the bottom of the base, and a circuit board with a main control chip installed on the base. Among them, at least a storage module, a metering module, a power management module, an HPLC module, a Bluetooth module and a microprocessor are integrated inside the main control chip. A unidirectional integrated circuit is arranged between the microprocessor and the metering module; a bidirectional integrated circuit is arranged between the microprocessor and the storage module; a bidirectional integrated circuit is arranged between the microprocessor and the Bluetooth module or the HPLC module.

[0008] A power module is provided on the circuit board. The power module is connected to the power management module of the main control chip. Power supply lines for providing electrical energy are provided between the power management module and the storage module, the metering module, the HPLC module, the Bluetooth module, and the microprocessor respectively.

[0009] A signal acquisition module is provided on the circuit board. The signal acquisition module is connected to the live wire to acquire current signals, and is connected to the neutral wire through a resistor voltage division method to acquire voltage signals; a data transmission line is provided between the signal acquisition module and the metering module of the main control chip.

[0010] Furthermore, a terminal block and a circuit board support pillar are provided on the top end face of the base. The terminal block is used to install terminal posts, and the circuit board support pillar is used to install the circuit board with the main control chip; terminal blocks are provided at both ends of the base, and several installation slots for installing terminal posts are provided in each terminal block; the circuit board support pillars are distributed between the two terminal blocks. When the circuit board with the main control chip is installed on the circuit board support pillar, the main control chip is connected to the terminal posts installed in the terminal blocks on both sides.

[0011] Furthermore, the housing is snapped onto the base and encloses the circuit board inside it;

[0012] A wiring socket is provided on the housing, which is used for connecting external input and output lines to the internal terminal posts;

[0013] A communication interface is also provided on one side of the housing, and the communication interface is internally connected to the communication module connected to the main control chip;

[0014] A protruding panel mounting groove is provided on the top of the housing, and the panel mounting groove is used to install the display panel, and the display panel is connected to the internal main control chip;

[0015] A first fixed cover plate and a second fixed cover plate are provided on both sides of the panel mounting groove, which are used to cover the top end of the housing.

[0016] Furthermore, the storage module on the main control chip is used to store the parameters of the electricity meter and the electricity quantity data; the parameters of the electricity meter refer to the basic information of the electricity meter, which includes the model, serial number, and version number of the electricity meter; the electricity quantity data refers to the electricity consumption situation of the user, which includes the real-time electricity quantity, cumulative electricity quantity, forward electricity quantity, and reverse electricity quantity.

[0017] Furthermore, the metering module on the main control chip receives the current and voltage collected by the signal acquisition module, and combines the preset electricity calculation formula to calculate the electricity consumption in real time; the metering module can also measure the active power, reactive power, active energy, and reactive energy, and the metering module can perform two independent calculations of active power and effective value, voltage effective value, line frequency, and zero-crossing interruption detection.

[0018] Furthermore, the power management module on the main control chip regulates the power modules externally connected to the main control chip. Among them, the power modules at least include a first power module, a second power module, and a third power module. The first power module, the second power module, and the third power module are sequentially connected to the zero and live wires of the power transmission line, and convert the AC voltage into voltages of different magnitudes through the first power module, the second power module, and the third power module to supply power to the electricity meter. Among them, the first power module serves as a backup power source, and the second power module and the third power module supply power to the main control chip simultaneously.

[0019] The first power module converts the voltage at the live wire end into a first voltage, the second power module converts the first voltage provided by the first power module into a second voltage, and the third power module converts the second voltage provided by the second power module into a third voltage.

[0020] Furthermore, the HPLC module on the main control chip can perform high-speed data transmission and real-time communication; the HPLC module uses the power line as a communication medium to achieve high-speed data transmission between the electricity meter and the remote server or data acquisition system; the HPLC module supports real-time uploading of electrical energy data, including voltage, current, and power.

[0021] Furthermore, the Bluetooth module on the main control chip adopts the BT5.2 + 2.4GHz protocol, which can perform wireless data transmission with a handheld meter reader, concentrator, or smartphone.

[0022] Furthermore, the signal acquisition module is directly connected to the zero and live wires of the power transmission line, and real-time collects the voltage and current signals on the zero and live wires, and transmits the collected voltage and current data to the metering module of the main control chip for analysis and processing.

[0023] Furthermore, the microprocessor of the main control chip is externally connected to a communication module. The communication module uses a 485 bus communication and has a 485 interface, which can access external devices to debug the electricity meter; the microprocessor of the main control chip is externally connected to a display panel. The display panel uses an LED screen and can display the electricity quantity, voltage, and current data.

[0024] The beneficial effects of the present utility model are as follows:

[0025] The utility model realizes an electric energy metering rail meter with a smaller volume. While expanding more functions on the basis of the existing technology, the volume is made more compact and robust, and the size reaches 70×36×30 (mm), which is about 35% smaller than the volume of the existing smaller rail meter. This small volume is especially suitable for distribution boxes or cabinets with limited space. This is particularly important for occasions with dense wiring, which can reduce mutual interference between devices and make the layout more tidy and orderly. The small volume not only provides convenience at the physical level, but also shows significant advantages in aspects such as system design, maintenance management, and environmental integration, promoting efficient and economical energy management practices.

[0026] The main control chip XL7501 of the utility model is independently developed, integrating a high-performance SoC with broadband carrier communication, Bluetooth communication, and single-phase metering. The dedicated single-phase metering can measure active power, reactive power, active energy, and reactive energy, and can simultaneously provide two independent active powers and effective values, voltage effective values, line frequencies, zero-crossing interrupts, etc., which can implement flexible anti-stealing electricity schemes and support full-digital gain, phase, and offset corrections; Bluetooth BT 5.2 + 2.4GHz (private protocol), meeting the relevant technical requirements of the State Grid and Southern Power Grid for Bluetooth meter calibration and inspection; therefore, at the communication level, not only can HPLC broadband carrier be used, but also Bluetooth communication can be realized; the most crucial thing is that it is small in volume, high in precision while being powerful in function; the product also has a 485 interface and can be connected to external devices for debugging. The common communication rate of the 485 interface on the market is generally 9600bps, but the advanced scheme used by the company can reach 115200 baud rate, greatly accelerating the communication rate.

[0027] Other advantages, objectives, and features of the utility model will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the utility model. The objectives and other advantages of the utility model can be realized and obtained through the following specification. Brief Description of the Drawings

[0028] In order to make the objectives, technical solutions, and advantages of the utility model clearer, the utility model will be described in detail preferably with reference to the accompanying drawings, where:

[0029] Figure 1 It is a schematic diagram of the overall structure of the ultra-small single-phase rail-type electric energy meter of the utility model;

[0030] Figure 2 It is a schematic diagram of the functional structure of the main control chip of the utility model;

[0031] Figure 3This is a three-dimensional assembly schematic diagram of the ultra-small single-phase rail-mounted energy meter of the present utility model.

[0032] Reference numerals: 100 - base; 200 - housing; 300 - rail structure; 400 - main control chip; 110 - wiring seat; 120 - circuit board support; 130 - terminal; 210 - first fixing cover; 220 - second fixing cover; 230 - wiring socket; 240 - communication interface; 250 - panel mounting groove; 310 - rail groove; 320 - rail hook; 330 - rail hook groove; 410 - storage module; 420 - metering module; 430 - power management module; 440 - HPLC module; 450 - Bluetooth module; 460 - microprocessor; 500 - communication module; 600 - display panel; 700 - power module; 800 - signal acquisition module; 710 - first power module; 720 - second power module; 730 - third power module. Detailed implementation manners

[0033] The following uses specific specific examples to illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present utility model in a schematic manner. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0034] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and cannot be understood as a limitation to the present utility model; in order to better illustrate the embodiments of the present utility model, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0035] In the drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation to the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] Please refer to Figures 1 to 3 , which is a super-small single-phase rail-mounted energy meter.

[0037] Embodiment

[0038] In this embodiment, a schematic three-dimensional structure diagram of the super-small single-phase rail-mounted energy meter as shown in Figure 1 is given. The super-small single-phase rail-mounted energy meter at least includes a base 100, a housing 200, a rail structure 300 provided at the bottom of the base 100, and a circuit board with a main control chip 400 installed on the base 100. Among them, as shown in Figure 2 , at least a storage module 410, a metering module 420, a power management module 430, an HPLC module 440, a Bluetooth module 450, and a microprocessor 460 are integrated inside the main control chip 400.

[0039] A power module 700 is provided on the circuit board. The power module 700 is connected to the power management module 430 of the main control chip 400. A circuit for providing electrical energy is provided between the power management module 430 and the storage module 410, the metering module 420, the HPLC module 440, the Bluetooth module 450, and the microprocessor 460 respectively.

[0040] A signal acquisition module 800 is provided on the circuit board. The signal acquisition module 800 is connected to the live wire to acquire current signals, and the signal acquisition module 800 is connected to the neutral wire by means of resistor voltage division to acquire voltage signals; a data transmission line is provided between the signal acquisition module 800 and the metering module 420 of the main control chip. The signal acquisition module 800 real-time acquires voltage and current signals on the live and neutral wires, and transmits the acquired voltage and current data to the metering module 420 of the main control chip 400 for analysis and processing.

[0041] A two-way integrated circuit is provided between the microprocessor 460 and the storage module 410 to ensure that the microprocessor 460 can store data information into the storage module 410 or retrieve corresponding data information from the storage module 410; a two-way integrated circuit is provided between the microprocessor 460 and the Bluetooth module 450 or the HPLC module 440 to ensure that the microprocessor 460 can transmit data to external devices or receive corresponding information from external devices through the Bluetooth module 450 or the HPLC module 440.

[0042] In this embodiment, the main control chip 400 integrates bandwidth carrier communication, Bluetooth communication, and single-phase metering into a high-performance and small-sized main control SoC. Without sacrificing the functions of the electric energy meter, the volume of the circuit board of the main control chip 400 is reduced, thereby reducing the overall volume and size of the entire electric energy meter, making the installation more convenient, not occupying too much space, and being able to be laid in a more dense and complex environment. Without reducing its usage functions, after expanding the functions, it still meets the smaller volume standard. The present utility model innovatively developed the main control chip 400 with the model number XL7501.

[0043] The main control chip 400 of the present utility model adopts the co-packaging form, which is a technology of packaging multiple chips or electronic modules with different functions together. It can achieve higher integration and smaller size, while improving the function density and speed of the chip. First, when co-packaging the storage module 410, metering module 420, power management module 430, HPLC module 440, Bluetooth module 450, and microprocessor 460 on the main control chip 400, a high-performance simulation algorithm is used to accurately characterize the multi-physical problems in the three-dimensional integrated packaging to optimize the design and ensure the high speed and low latency of the electrical connection.

[0044] Between the storage module 410, metering module 420, power management module 430, HPLC module 440, Bluetooth module 450, and microprocessor 460 of the present utility model, signal interference between different functional modules is isolated by setting a shielding layer or isolation belt, and the storage module 410, metering module 420, power management module 430, HPLC module 440, Bluetooth module 450, and microprocessor 460 adopt differential signals instead of single-ended signals to reduce signal interference between multiple functional modules.

[0045] The storage module 410, metering module 420, power management module 430, HPLC module 440, Bluetooth module 450, and microprocessor 460 of the present utility model dissipate heat from the main control chip 400 by using an efficient thermal interface material (TIM) and heat sink cover material. Specifically, there are certain gaps between each module after packaging and the main control chip 400, and these gaps are not conducive to the heat dissipation of each functional module on the main control chip 400. Therefore, it is necessary to use a thermal interface material (TIM) to fill these gaps to fully solve the heat dissipation problem.

[0046] Additionally, the present utility model has relatively high requirements for the process accuracy during the manufacturing process. As the chip size shrinks, the requirements for the accuracy of the packaging process become higher and higher. Especially during the chip pick-and-place process, it is necessary to precisely operate the tiny chips.

[0047] Specifically, the storage module 410 on the main control chip 400 is mainly used to store the power meter parameters and power consumption data. Among them, the power meter parameters include basic information such as the model, serial number, and version number of the meter, as well as various coefficients and parameters required for measuring and calculating electric energy. These parameters are the basis for the normal operation and accurate measurement of the power meter; the power consumption data refers to the power consumption situation of users, which includes real-time power consumption, cumulative power consumption, forward power, reverse power, etc. These data are of great significance for aspects such as user electricity bill settlement and power grid load analysis.

[0048] The metering module 420 on the main control chip 400 receives the current and voltage collected by the signal acquisition module 800, and combines with the preset electric energy calculation formula to accurately calculate the power consumption of electric energy in real time. This is the most basic and important function of the power meter. The dedicated single-phase metering can measure active power, reactive power, active energy, and reactive energy, and can simultaneously provide two independent active powers and effective values, voltage effective values, line frequencies, zero-crossing interrupts, etc., which can implement flexible anti-stealing electricity schemes and support full-digital gain, phase, and offset corrections. In the digital domain, the amplitude of the signal is adjusted by performing a multiplication operation on the signal. The gain correction coefficient can be determined through the calibration process and is usually a fixed digital factor. Phase correction is usually achieved through digital filters, such as finite impulse response (FIR) filters or infinite impulse response (IIR) filters. These filters can be designed to introduce a specific phase delay to compensate for the original phase shift. In the digital domain, offset correction can be achieved by subtracting a fixed offset from the signal. This offset can be determined through the calibration process and is usually the average value of the signal under no input or known zero input conditions.

[0049] The power management module 430 on the main control chip 400 regulates the power module 700 externally connected to the main control chip 400. Among them, the power module 700 at least includes a first power module 710, a second power module 720, and a third power module 730. The first power module 710, the second power module 720, and the third power module 730 are sequentially connected to the 220V AC zero and live wires of the household power transmission line, and convert the 220V AC voltage into voltages of different magnitudes through the first power module 710, the second power module 720, and the third power module 730 to supply power to the electric energy meter. Among them, the first power module 710 converts the 220V voltage into a 12V voltage. In this embodiment, the first power module 710 serves as a backup power supply and simultaneously transmits the 12V voltage to the second power module 720; the second power module 720 converts the 12V voltage into a 3.3V voltage and simultaneously transmits the 3.3V voltage to the third power module 730; the third power module 730 converts the 3.3V voltage into a 1.1V voltage. In this embodiment, the second power module 720 and the third power module 730 supply power to the components on the circuit board simultaneously.

[0050] The HPLC (High-speed Power Line Carrier) module on the main control chip 400 has high-speed data transmission capabilities and real-time communication capabilities. The HPLC module 440 uses the power line as a communication medium to achieve high-speed data transmission between the electric energy meter and a remote server or a data acquisition system. This transmission method not only improves the efficiency of data transmission but also reduces communication costs because there is no need to lay additional communication lines. The HPLC module 440 supports real-time communication, enabling the electric energy meter to upload electric energy data in real time, including parameters such as voltage, current, and power, providing strong support for the real-time monitoring and dispatching of the power grid.

[0051] The Bluetooth module 450 on the main control chip 400 enables the electric energy meter to perform wireless data transmission with devices such as a handheld meter reader, a concentrator, or a smartphone. Through Bluetooth connection, these devices can read the data in the electric meter to achieve wireless meter reading, thus avoiding the labor costs and time costs in the traditional wired meter reading method. The Bluetooth module 450 supports real-time communication, enabling the electric energy meter to upload electric energy data in real time, including parameters such as voltage, current, and power. This helps the power company to monitor and dispatch the power grid in real time, improving the operating efficiency and stability of the power grid. The Bluetooth module 450 adopts the BT 5.2+2.4GHz protocol (private protocol), meeting the relevant technical requirements for Bluetooth meter calibration and inspection of the State Grid and the Southern Grid.

[0052] The microprocessor 460 on the main control chip 400 is connected to the communication module 500. Among them, the communication module 500 uses 485 bus communication and has a 485 interface, which can access external devices to debug the electric energy meter. It is worth mentioning that the common communication rate of the 485 interface on the market is generally 9600bps, but the baud rate of the 485 interface connected to the main control chip 400 of the present utility model can reach 115200, greatly accelerating the communication rate.

[0053] The microprocessor 460 of the main control chip 400 is connected to the display panel 600. Among them, the display panel 600 uses an LED screen and can display data such as electric quantity, voltage, and current.

[0054] In this embodiment, as Figure 3 shows a schematic three-dimensional assembly structure diagram of the ultra-small single-phase rail-mounted electric energy meter. Among them, a rail structure 300 is opened at the bottom of the base 100, and the rail structure 300 includes a rail groove 310, a rail hook 320, and a rail hook groove 330.

[0055] A wiring seat 110 and a circuit board support 120 are arranged on the top end surface of the base 100. The wiring seat 110 is used to install the wiring post 130, and the circuit board support 120 is used to install the circuit board with the main control chip 400. Preferably, in this embodiment, a wiring seat 110 is respectively arranged at both ends of the base 100, and each wiring seat 110 is provided with two installation slots for installing the wiring post 130, that is, a total of four wiring posts 130 are provided. Preferably, the circuit board supports 120 are also set to four and are distributed at the four corners between the two wiring seats 110. When the circuit board with the main control chip 400 is installed on the four circuit board supports 120, it is convenient to connect the main control chip 400 with the wiring posts 130 installed in the wiring seats 110 on both sides.

[0056] The housing 200 is buckled on the base 100 and encloses the wiring post 130, the main control chip 400, and other power modules 700, signal acquisition modules 800, and 485 communication modules 500 connected to the main control chip 400 inside it. A wiring socket 230 is arranged on the housing 200, which is convenient for external input and output lines to be connected to the internal wiring post 130.

[0057] A communication interface 240 is also arranged on one side of the housing 200. The communication interface 240 is internally connected to the communication module 500 connected to the main control chip 400, which is convenient for connecting to other external devices to debug the electric energy meter.

[0058] The top of the housing 200 is provided with a protruding panel mounting groove 250 for mounting the LED display panel 600, and the LED display panel 600 is also connected to the internal main control chip 400. On both sides of the panel mounting groove 250, there are a first fixing cover plate 210 and a second fixing cover plate 220 for covering the top end of the housing 200.

[0059] Benefiting from the advanced, compact and fully functional main control chip 400, this new embodiment realizes a smaller-sized power metering rail meter without sacrificing the functions of the electricity meter. While expanding more functions on the basis of the original technology, it makes the volume smaller, more compact and robust, with the size reaching 70×36×30 (mm), which is about 35% smaller than the existing smaller rail meters. This small volume is especially suitable for distribution boxes or cabinets with limited space. This is particularly important for densely wired scenarios, which can reduce mutual interference between devices and make the layout more tidy and orderly. The small volume not only provides convenience at the physical level, but also shows significant advantages in system design, maintenance management and environmental integration, promoting efficient and economical energy management practices.

[0060] Overall, the overall length of the ultra-small single-phase rail type electricity meter of this utility model is about 70 mm, the maximum height is about 30 mm, the heights on both sides are about 25 mm and 21 mm respectively, and the overall width is about 36 mm.

[0061] Due to the compact and small design of this utility model, they can save the installation space to the greatest extent. This is particularly important for application scenarios with limited space, such as ultra-small electrical control cabinets, compact devices or areas that require high-density installation. The small design of the rail meter enables them to flexibly adapt to different installation environments and configuration requirements. Users can select a suitable rail meter according to actual needs and expand and upgrade it to meet the changing application requirements.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the purpose and scope of the present technical solution, and they should all be covered within the scope of the claims of the present utility model.

Claims

1. An ultra-small single-phase rail-type electric energy meter, characterized in that: It comprises a base (100), a housing (200), a guide rail structure (300) arranged at the bottom of the base (100), and a circuit board with a main control chip (400) installed on the base (100), wherein: The main control chip (400) is integrated with at least a storage module (410), a metering module (420), a power management module (430), an HPLC module (440), a Bluetooth module (450), and a microprocessor (460); a unidirectional integrated circuit is arranged between the microprocessor (460) and the metering module (420); a bidirectional integrated circuit is arranged between the microprocessor (460) and the storage module (410); and a bidirectional integrated circuit is arranged between the microprocessor (460) and the Bluetooth module (450) or the HPLC module (440); A power module (700) is arranged on the circuit board, the power module (700) is connected to a power management module (430) of a main control chip (400), and circuits for providing electric energy are arranged between the power management module (430) and the storage module (410), the metering module (420), the HPLC module (440), the Bluetooth module (450) and the microprocessor (460) respectively; A signal acquisition module (800) is arranged on the circuit board, the signal acquisition module (800) is connected to the live wire to collect current signals, and the signal acquisition module (800) is connected to the neutral wire by means of a resistor voltage divider to collect voltage signals; a data transmission line is arranged between the signal acquisition module (800) and the metering module (420) of the main control chip (400).

2. The ultra-small single-phase rail-type electric energy meter according to claim 1 is characterized in that: A wiring seat (110) and a circuit board pillar (120) are provided on the top end surface of the base (100); the wiring seat (110) is used to install a wiring post (130), and the circuit board pillar (120) is used to install a circuit board with a main control chip (400); A wiring seat (110) is provided at each end of the base (100), and each wiring seat (110) is provided with a plurality of mounting grooves for mounting wiring posts (130); the circuit board pillars (120) are distributed between the two wiring seats (110); when a circuit board with a main control chip (400) is mounted on the circuit board pillars (120), the main control chip (400) is connected to the wiring posts (130) mounted in the wiring seats (110) on both sides; A guide rail structure (300) is provided at the bottom of the base (100), and the guide rail structure (300) comprises a guide rail groove (310), a guide rail hook (320) and a guide rail hook groove (330).

3. The ultra-small single-phase rail-type electric energy meter according to claim 1 is characterized in that: The housing (200) is buckled onto the base (100) and seals the circuit board inside. The housing (200) is provided with a wiring socket (230) for connecting external input and output lines with internal wiring posts (130); A communication interface (240) is also provided on one side of the housing (200), and the communication interface (240) is internally connected to a communication module (500) connected to the main control chip (400); A protruding panel mounting groove (250) is provided on the top of the housing (200), and the panel mounting groove (250) is used to mount a display panel (600), and the display panel (600) is connected to an internal main control chip (400); A first fixed cover plate (210) and a second fixed cover plate (220) are provided on both sides of the panel installation groove (250) and are used to cover the top end of the housing (200).

4. The ultra-small single-phase rail-type electric energy meter according to claim 1 is characterized in that: The storage module (410) on the main control chip (400) is used to store electric energy meter parameters and electric energy data; the electric energy meter parameters refer to the basic information of the electric energy meter, including the model, serial number and version number of the electric energy meter; the electric energy data refers to the user's electric energy consumption, including real-time electric energy, accumulated electric energy, forward electric energy and reverse electric energy.

5. The ultra-small single-phase rail-type electric energy meter according to claim 1 is characterized in that: The metering module (420) on the main control chip (400) receives the current and voltage collected by the signal collection module (800), and calculates the electric energy consumption in real time in combination with a preset electric energy calculation formula; The metering module (420) can also measure active power, reactive power, active energy, and reactive energy, and the metering module (420) can perform two independent active power and effective values, voltage effective values, line frequency calculations, and zero-crossing interruption detection.

6. The ultra-small single-phase rail-type electric energy meter according to claim 1, characterized in that: The power module (700) comprises at least a first power module (710), a second power module (720) and a third power module (730), the first power module (710) being a standby power source, and the second power module (720) and the third power module (730) supply power to other components on the circuit board through the power management module (430); The first power module (710), the second power module (720) and the third power module (730) are sequentially connected in series to the live wire end, and the voltage of the live wire end is converted step by step, wherein the first power module (710) converts the voltage of the live wire end into a first voltage, the second power module (720) converts the first voltage provided by the first power module (710) into a second voltage, and the third power module (730) converts the second voltage provided by the second power module (720) into a third voltage.

7. The ultra-small single-phase rail-type electric energy meter according to claim 1 is characterized in that: The HPLC module (440) on the main control chip (400) is capable of high-speed data transmission and real-time communication; the HPLC module (440) uses the power line as a communication medium to achieve high-speed data transmission between the electric energy meter and a remote server or a data acquisition system; the HPLC module (440) supports real-time uploading of electric energy data, including voltage, current, and power.

8. The ultra-small single-phase rail-type electric energy meter according to claim 1 is characterized in that: The Bluetooth module (450) on the main control chip (400) adopts the BT5.2+2.4GHz protocol, and can perform wireless data transmission with a handheld meter reader, a concentrator or a smart phone.

9. The ultra-small single-phase rail-type electric energy meter according to claim 1, characterized in that: The communication module (500) externally connected to the main control chip (400) adopts a 485 bus communication line and has a 485 interface, which can be connected to an external device to debug the electric energy meter.

10. The ultra-small single-phase rail-type electric energy meter according to claim 1, characterized in that: The microprocessor (460) of the main control chip (400) is externally connected to a display panel (600), and the display panel (600) adopts an LED screen and can display data on electric quantity, voltage, and current.

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