Multifunctional small single-phase guide rail type electric energy meter with relay

Abstract

The utility model relates to a multifunctional small single-phase guide rail type electric energy meter with a relay, 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 circuit board is installed on the base and provided with a main control chip, at least a storage module, a metering module, a power management module, an HPLC module, a Bluetooth module and a microprocessor are integrated in the main control chip, the power module is arranged on the circuit board to supply power to elements on the circuit board, and the microprocessor is connected with the shell. The circuit board is provided with a signal acquisition module for acquiring voltage and current information of null and live wires. A relay is arranged between the circuit board and the live wire. On the premise that the function of the electric energy meter is not castrated, the electric energy meter is smaller in size, does not occupy too much space, can be laid in a denser and more complex environment, and can still reach a smaller size standard after the function is expanded on the premise that the use function of the electric energy meter is not reduced.

Description

Technical Field

[0001] The utility model belongs to the field of power measurement and energy management, and relates to a multifunctional small single-phase rail-mounted electric energy meter with a relay. Background Art

[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-mounted 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-mounted 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 high and certain technical support is required, in high-end users, intelligent homes and rental houses and other occasions, the rail-mounted electric meter still has a broad market prospect.

[0004] The existing single-phase rail-mounted electric meter 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 group 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, so as 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. Summary of the Utility Model

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

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

[0007] A multifunctional small single-phase rail-mounted electric energy meter with a relay, which includes a base, a housing, a rail structure arranged at the bottom of the base, and a circuit board installed on the base and with a main control chip. 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 supply module is provided on the circuit board to supply power to the components on the circuit board, and a signal acquisition module is provided on the circuit board to acquire the voltage and current information of the live wire and the neutral wire.

[0009] A relay is provided between the circuit board and the live wire. Among them, the relay includes a manganin resistor connected in series to the live wire, several wires connected to the live wire row, and an externally provided relay drive module. Some of the wires connected to the live wire row are connected to the signal acquisition module through the manganin resistor to acquire current signals, and the other wires are connected to the circuit board after being connected in series with the internal contacts of the relay; the relay drive module is provided on the circuit board and is connected to the internal contacts of the relay through wires, and the relay drive module is connected to the main control chip.

[0010] The signal acquisition module on the circuit board is connected to the neutral wire, and the signal acquisition module acquires voltage signals by setting resistor voltage division.

[0011] 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.

[0012] Terminal blocks are respectively provided at both ends of the base. Each terminal block is provided with several installation slots for installing terminal posts; 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.

[0013] A guide rail structure is opened at the bottom of the base. The guide rail structure includes a guide rail groove, a guide rail hook, and a guide rail hook groove.

[0014] Furthermore, the housing is buckled on the base and encloses the circuit board and the relay inside it.

[0015] A wiring socket is provided on the housing, which is used for connecting external input and output lines to the internal terminal posts.

[0016] A communication interface is also provided on one side of the housing. The communication interface is internally connected to the communication module connected to the main control chip.

[0017] A protruding panel mounting groove is provided at the top of the housing. The panel mounting groove is used to install a display panel, and the display panel is connected to the internal main control chip.

[0018] 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.

[0019] Furthermore, the power supply module at least includes a first power supply module, a second power supply module, and a third power supply module. The first power supply module supplies power to the relay driving module of the relay, and the second power supply module and the third power supply module supply power to other components on the circuit board through the power management module.

[0020] The first power supply module, the second power supply module, and the third power supply module are sequentially connected in series to the live wire terminal, and the voltage of the live wire terminal is divided step by step. Among them, the first power supply module converts the voltage of the live wire terminal into a first voltage, the second power supply module converts the first voltage provided by the first power supply module into a second voltage, and the third power supply module converts the second voltage provided by the second power supply module into a third voltage.

[0021] Furthermore, the storage module on the main control chip is used to store the electricity meter parameters and electricity quantity data; the electricity meter parameters 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 real-time electricity quantity, cumulative electricity quantity, forward electricity quantity, and reverse electricity quantity.

[0022] 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 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.

[0023] 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 the 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 electricity data, including voltage, current, and power.

[0024] 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 smart phone.

[0025] Furthermore, the microprocessor of the main control chip is externally connected to a communication module. The communication module uses a 485 bus communication line, which has a 485 interface and can access external devices to debug the electricity meter.

[0026] Furthermore, the microprocessor of the main control chip is externally connected to a display panel. The display panel uses an LED screen and can display electricity quantity, voltage, and current data.

[0027] The beneficial effects of the present utility model are as follows:

[0028] The utility model realizes a power metering rail meter with a power-off protection function and 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 82×36×50 (mm), which is about 30% 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 system design, maintenance management, and environmental integration, promoting efficient and economical energy management practices.

[0029] 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 correction; Bluetooth BT 5.2 + 2.4GHz (private protocol), meeting the relevant technical requirements of Bluetooth meter calibration and inspection in State Grid and Southern Power Grid; 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, which 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.

[0030] Other advantages, objectives, and features of the utility model will be described to some extent in the subsequent description, 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 achieved and obtained through the following description. Brief Description of the Drawings

[0031] 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:

[0032] 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;

[0033] Figure 2 It is a schematic diagram of the functional structure of the main control chip of the utility model;

[0034] Figure 3This is a three-dimensional assembly schematic diagram of the ultra-small single-phase rail-mounted energy meter of the present utility model.

[0035] 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. Specific embodiments

[0036] 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 drawings provided in the following embodiments only schematically illustrate the basic concept of the present utility model. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0037] 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 does not represent the size 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.

[0038] 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. It 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.

[0039] Please refer to Figures 1 to 3 , which is a multifunctional small single-phase rail-mounted electricity meter with a relay.

[0040] Embodiment

[0041] In this embodiment, a three-dimensional structural schematic diagram of an ultra-small single-phase rail-mounted electricity meter as shown in Figure 1 is given. The ultra-small single-phase rail-mounted electricity 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. A power module 700 is provided on the circuit board to supply power to other components, and a signal acquisition module 800 is provided on the circuit board to obtain voltage and current information on the live and neutral wires.

[0042] A relay 900 is provided between the circuit board and the live wire. Among them, the relay 900 includes a manganin resistor connected in series to the live wire, several wires connected to the live wire row, and an external relay drive module 910. In this embodiment, the number of wires connected to the live wire row is set to three. Some of the wires connected to the live wire row are connected to the signal acquisition module 800 through the manganin resistor to collect current signals, and the other wires are connected to the circuit board after being connected in series with the internal contacts of the relay (900). In this embodiment, two of the three wires are connected from both ends of the manganin resistor to the signal acquisition module 800, and the other wire is connected to the circuit board. The relay drive module 910 is provided on the circuit board and is connected to the internal contacts of the relay 900 through two wires. The relay drive module 910 is connected to the main control chip 400, so that the electricity meter can control the on / off of the single-phase rail-mounted electricity meter under specific circumstances.

[0043] The specific circumstances include abnormal circumstances and arrears circumstances. The abnormal circumstances refer to when abnormal circumstances (such as overload, short circuit, undervoltage, etc.) occur in the circuit, the main control chip 400 disconnects the internal contacts of the relay 900 through the relay drive module 910, quickly cuts off the circuit, and protects the load device and the electricity meter itself.

[0044] The relay 900 can also control the on / off of the circuit according to the user's fee situation. In the case of user arrears, the relay 900 is disconnected under remote control.

[0045] In addition, the relay 900 is also responsible for bearing the flow of large currents on the live and neutral wires, avoiding the circuit board being burned out by large currents.

[0046] In addition to collecting the current signal of the live wire through the manganin resistor on the relay 900, the signal acquisition module 800 on the circuit board is also directly connected to the neutral wire, and the voltage signal is collected by the set resistor through resistor voltage division.

[0047] The power supply module 700 includes at least a first power supply module 710, a second power supply module 720, and a third power supply module 730. The first power supply module 710 supplies power to the relay drive module 910 of the relay 900. The second power supply module 720 and the third power supply module 730 supply power to other components on the circuit board through the power management module 430. The power management module 430 supplies power to the storage module 410, the metering module 420, the HPLC module 440, the Bluetooth module 450, and the microprocessor 460 through a circuit. A unidirectional integrated circuit is provided between the microprocessor 460 and the metering module 420 to transmit the data information calculated by the metering module 420 to the microprocessor 460. A bidirectional integrated circuit is provided between the microprocessor 460 and the storage module 410 to ensure that the microprocessor 460 can store data information in the storage module 410 or retrieve corresponding data information from the storage module 410. A bidirectional 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 an external device or receive corresponding information from the external device through the Bluetooth module 450 or the HPLC module 440.

[0048] The first power supply module 710, the second power supply module 720, and the third power supply module 730 are sequentially connected in series to the live wire terminal, and the voltage of the live wire terminal is converted step by step. Among them, the first power supply module 710 converts the voltage of the live wire terminal into a first voltage, the second power supply module 720 converts the first voltage provided by the first power supply module 710 into a second voltage, and the third power supply module 730 converts the second voltage provided by the second power supply module 720 into a third voltage.

[0049] Specifically, in this embodiment, the first power supply module 710 converts the voltage of 220V into a voltage of 12V. In this embodiment, the first power supply module 710 supplies power to the relay drive module 910 and at the same time transmits the voltage of 12V to the second power supply module 720. The second power supply module 720 converts the voltage of 12V into a voltage of 3.3V and at the same time transmits the voltage of 3.3V to the third power supply module 730. The third power supply module 730 converts the voltage of 3.3V into a voltage of 1.1V. In this embodiment, the second power supply module 720 and the third power supply module 730 supply power to the components on the circuit board at the same time.

[0050] Preferably, in this embodiment, the main control chip 400 integrates bandwidth carrier communication, Bluetooth communication, and single-phase metering into a high-performance and small-size main control SoC. The input of the live and neutral wires powers the entire electricity meter system, and the on / off is controlled by a relay. Data is collected through a sampling circuit and transmitted to the internally co-packaged metering chip XL7501 for metering. Then, long-distance communication and regulation are achieved through HPLC broadband carrier technology or Bluetooth. At the same time, RS485 can also be used for wireless debugging and remote monitoring; the LCD screen displays specific data. Without sacrificing the functions of the electricity 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 electricity meter, making installation more convenient, not occupying too much space, and being able to be laid in a more dense and complex environment. It can meet the smaller volume standard after expanding functions without reducing its usage functions. The present utility model innovatively developed the main control chip 400 with the model number XL7501.

[0051] Preferably, the main control chip 400 of the present utility model adopts a co-packaged 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, high-performance simulation algorithms are used to accurately characterize multi-physical problems in three-dimensional integrated packaging to optimize the design and ensure the high speed and low latency of electrical connections.

[0052] 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. Moreover, 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.

[0053] 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 high-efficiency thermal interface materials (TIM) and heat sink cover materials. Specifically, there are certain gaps between each module after encapsulation and the main control chip 400. 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 thermal interface materials (TIM) to fill these gaps to fully solve the heat dissipation problem.

[0054] Additionally, the present utility model has relatively high requirements for process precision during the manufacturing process. As the chip size shrinks, the requirements for the precision of the packaging process are getting higher and higher. Especially during the chip pick-and-place process, it is necessary to precisely operate the tiny chips.

[0055] Specifically, the storage module 410 on the main control chip 400 is mainly used to store the electric energy meter parameters and power consumption data. Among them, the electric energy meter parameters include basic information such as the model, serial number, and version number of the electric 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 electric energy meter; the power consumption data refers to the electricity consumption situation of users, which includes real-time power consumption, cumulative power consumption, forward power consumption, reverse power consumption, etc. These data are of great significance for aspects such as user electricity bill settlement and power grid load analysis.

[0056] 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 a preset electric energy calculation formula to accurately calculate the consumed electric energy in real time. This is the most basic and important function of the electric energy 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 a flexible anti-stealing electricity scheme 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 a 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 offset. In the digital domain, offset correction can be achieved by subtracting a fixed offset from the signal. This offset can be determined through a calibration process and is usually the average value of the signal under no input or known zero input conditions.

[0057] 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 the communication medium to achieve high-speed data transmission between the electric energy meter and the remote server or 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.

[0058] The Bluetooth module 450 on the main control chip 400 enables the electricity meter to perform wireless data transmission with devices such as handheld meter readers, concentrators, or smartphones. Through Bluetooth connection, these devices can read the data in the electricity 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 electricity meter to upload electricity data in real time, including parameters such as voltage, current, and power. This helps power companies to monitor and dispatch the power grid in real time, improving the operation 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 State Grid and Southern Power Grid.

[0059] Preferably, the signal acquisition module 800 is connected to the zero and live wires of 220V through the relay 900, and the voltage and current signals on the zero and live wires are collected in real time, and the collected voltage and current data are transmitted to the metering module 420 of the main control chip 400 for analysis and processing.

[0060] Preferably, a connection is made between the microprocessor 460 on the main control chip 400 and the communication module 500. Among them, the communication module 500 uses 485 bus communication, which has a 485 interface and can access external devices to debug the electricity 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.

[0061] Preferably, 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 electricity quantity, voltage, and current.

[0062] In this embodiment, as Figure 3 shows a three-dimensional assembly structure schematic diagram of an ultra-small single-phase rail-mounted electricity 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.

[0063] The top end face of the base 100 is provided with a terminal block 110 and a circuit board support 120. The terminal block 110 is used to install terminal posts 130, and the circuit board support 120 is used to install a circuit board with a main control chip 400. Preferably, in this embodiment, a terminal block 110 is respectively arranged at both ends of the base 100, and each terminal block 110 is provided with two installation slots for installing terminal posts 130, that is, a total of four terminal 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 terminal blocks 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 terminal posts 130 installed in the terminal blocks 110 on both sides.

[0064] The housing 200 is buckled on the base 100 and encloses the circuit board and the relay 900 inside it. The housing 200 is provided with a wiring socket 230, which is convenient for external input and output lines to be connected to the internal terminal posts 130.

[0065] One side of the housing 200 is also provided with a communication interface 240, and the communication interface 240 is internally connected to a communication module 500 connected to the main control chip 400, which is convenient for connecting to other external devices to debug the electricity meter.

[0066] The top of the housing 200 is provided with a protruding panel installation groove 250, and the panel installation groove 250 is used to install an LED display panel 600. The LED display panel 600 is also connected to the internal main control chip 400. On both sides of the panel installation groove 250, there are a first fixing cover 210 plate and a second fixing cover 220 plate, which are used to cover the top end of the housing 200.

[0067] Benefiting from the advanced, small and fully functional main control chip 400, this new type of electricity meter realizes a smaller volume of the electricity metering rail meter without sacrificing the functions of the electricity meter. While expanding more functions on the basis of the original technology, the volume is made more compact and firm. The size reaches 82×36×50 (mm), which is about 30% smaller than 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 the 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, etc., promoting efficient and economical energy management practices.

[0068] Overall, the overall length of the ultra-small single-phase rail type electricity meter of the present utility model is about 82 mm, the maximum height is about 50 mm, the heights on both sides are about 37.85 mm and 31 mm respectively, and the overall width is about 36 mm.

[0069] Due to the compact and small design of the present utility model, they can maximize the saving of installation space. This is particularly important for application scenarios with limited space, such as ultra-small electrical control cabinets, compact devices, or areas requiring high-density installation. The small design of the rail table enables them to flexibly adapt to different installation environments and configuration requirements. Users can select a suitable rail table according to actual needs and expand and upgrade it to meet the changing application requirements.

[0070] 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. A multifunctional small single-phase rail-type electric energy meter with a relay, 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 installed on the base (100) and having a main control chip (400), 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 supply module (700) is arranged on the circuit board to supply power to the components on the circuit board, and a signal collection module (800) is arranged on the circuit board to collect voltage and current information of the neutral and live wires; A relay (900) is arranged between the circuit board and the live wire, wherein the relay (900) comprises a manganese copper resistor connected in series to the live wire, a plurality of wires connected to the live wire row, and an external relay driving module (910), wherein some of the wires connected to the live wire row are connected to the signal acquisition module (800) through the manganese copper resistor to collect current signals, and other wires are connected in series to internal contacts of the relay (900) and then connected to the circuit board; the relay driving module (910) is arranged on the circuit board and connected to the internal contacts of the relay (900) through wires, and the relay driving module (910) is connected to the main control chip (400); The signal acquisition module (800) on the circuit board is connected to the neutral line, and the signal acquisition module (800) acquires voltage signals by setting a resistor voltage divider.

2. A multifunctional small single-phase rail-type electric energy meter with a relay according to claim 1, 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. A multifunctional small single-phase rail-type electric energy meter with a relay according to claim 1, characterized in that: The housing (200) is buckled onto the base (100) and encloses the circuit board and the relay (900) 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. A multifunctional small single-phase rail-type electric energy meter with a relay 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) supplies power to a relay driving module (910) of the relay (900); 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.

5. A multifunctional small single-phase rail-type electric energy meter with a relay according to claim 1, 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.

6. A multifunctional small single-phase rail-type electric energy meter with a relay according to claim 1, 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.

7. A multifunctional small single-phase rail-type electric energy meter with a relay according to claim 1, 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. A multifunctional small single-phase rail-type electric energy meter with a relay according to claim 1, 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. A multifunctional small single-phase rail-type electric energy meter with a relay according to claim 1, characterized in that: The microprocessor (460) of the main control chip (400) is externally connected to the communication module (500). The communication module (500) uses a 485 bus communication line and has a 485 interface, and can be connected to an external device to debug the electric energy meter.

10. A multifunctional small single-phase rail-type electric energy meter with a relay 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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