Guide rail type G3PLC prepayment meter

Abstract

The utility model provides a guide rail type G3PLC (Programmable Logic Controller) prepayment meter, which solves the problems of electricity stealing detection and the like of an electricity meter and comprises an MCU (Microprogrammed Control Unit) module, the MCU module is connected with a metering module and a communication module, the communication module adopts any one or combination of more of G3-PLC communication, RS485 communication and infrared communication, the MCU module adopts an HT5XXX type single-phase electric energy metering SoC (System on Chip) chip, and the metering module is connected with the MCU module. And the metering module is integrated in the MCU module. The system has the advantages of good detection effect, low deployment cost and the like.

Description

Technical Field

[0001] This utility model belongs to the field of smart meter technology, specifically relating to a rail-mounted G3PLC prepaid meter. Background Technology

[0002] Traditional electricity meters suffer from problems such as poor data transmission stability due to a single communication method, susceptibility to damage and tampering of mechanical structures, and limited anti-theft measures confined to passive monitoring. Existing equipment generally suffers from low functional module integration and poor adaptability to field installation, making it difficult to meet the needs of smart distribution areas for real-time perception of equipment status and intervention in anomalies.

[0003] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses a tiered prepaid electricity meter [200820133588.8], which includes a prepaid electricity meter composed of a main control module and connected modules such as a real-time clock module, an E-SAM key authentication module, a card protection module, a display module, an infrared / 485 / PLC communication module, a power on / off module, a storage module, a metering module, and a power supply module. A tiered pricing module is also provided between the metering module and the main control module.

[0004] The above solution has solved the problem of limited communication methods to some extent, but it still has many shortcomings, such as poor detection of electricity theft. Summary of the Invention

[0005] The purpose of this utility model is to address the above-mentioned problems by providing a reasonably designed rail-mounted G3PLC prepaid meter with good electricity theft detection performance.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a rail-mounted G3PLC prepaid meter, including an MCU module, the MCU module being connected to a metering module and a communication module, the communication module employing any one or more combinations of G3-PLC communication, RS485 communication and infrared communication, the MCU module using an HT5XXX model single-phase energy metering SoC chip, and the metering module being integrated within the MCU module.

[0007] In the aforementioned rail-mounted G3PLC prepaid meter, the MCU module is connected to a power supply module, which uses a constant voltage switching power supply chip.

[0008] In the aforementioned DIN rail type G3PLC prepaid meter, the power module outputs two 12V power supplies, one RS4585 power supply, and two 3.3V power supplies.

[0009] In the aforementioned rail-mounted G3PLC prepaid meter, the MCU module is connected to a storage module.

[0010] In the aforementioned DIN rail type G3PLC prepaid table, the storage module uses 4MB of SPI FLASH memory and 512KB of EEP memory.

[0011] In the aforementioned rail-mounted G3PLC prepaid meter, the MCU module is connected to peripheral modules, which include a relay control module, a buzzer driver module, indicator lights, and a cover opening detection module.

[0012] In the aforementioned rail-mounted G3PLC prepaid meter, the metering module includes an EMU module integrated within the MCU module.

[0013] In the aforementioned rail-mounted G3PLC prepaid meter, the EMU module uses a resistor divider to sample two current channels, one for shunt sampling and the other for CT sampling.

[0014] In the aforementioned prepaid table for a rail-mounted G3PLC, the MCU module selected is the HT5017 model.

[0015] In the aforementioned rail-mounted G3PLC prepaid table, the G3-PLC communication module uses the XZ1559BP-NC communication chip, and the RS485 communication module uses the RS485-DIP-11-1 communication chip.

[0016] Compared with existing technologies, the advantages of this utility model are as follows: By adopting G3-PLC communication technology, existing power lines can be directly used as the communication medium without the need for new communication infrastructure, significantly reducing deployment costs. It also possesses strong penetration capabilities, adapting to complex building structures and effectively covering areas difficult to reach with traditional wireless communication, such as basements and remote areas. By integrating an RS485 industrial bus and an infrared communication module to form a redundant channel, a multi-layered communication guarantee mechanism is established, greatly improving the stability and reliability of data transmission. Especially in power grid noise environments, its communication stability is superior to traditional wireless solutions. By employing a differential voltage sampling circuit to compare the phase / neutral current difference in real time, combined with multi-dimensional monitoring methods such as cover-opening detection switch groups and environmental magnetic field monitoring, a graded alarm can be activated when the current imbalance exceeds 15%, realizing a shift from passive monitoring to active protection and significantly improving anti-theft capabilities. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a circuit diagram of the MCU module of this utility model;

[0019] Figure 3This is a circuit diagram of the communication module of this utility model;

[0020] Figure 4 This is another circuit diagram of the communication module of this utility model;

[0021] Figure 5 This is another circuit diagram of the communication module of this utility model;

[0022] In the diagram, MCU module 1, metering module 2, communication module 3, power supply module 4, storage module 5, and peripheral module 6 are shown. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1-5 As shown, a rail-mounted G3PLC prepaid meter includes an MCU module 1, a metering module 2, and a communication module 3. The MCU module 1 uses the HT5017 single-phase energy metering SoC chip, which belongs to the HT5XXX series and features high-precision metering and powerful processing capabilities. The metering module 2 is integrated into the MCU module 1, eliminating the need for an external metering chip, simplifying circuit design, and improving system reliability.

[0025] Specifically, communication module 3 employs a combination of multiple communication methods, including G3-PLC communication, RS485 communication, and infrared communication. G3-PLC communication uses the XZ1559BP-NC communication chip, which supports the G3-PLC standard protocol and features strong anti-interference capabilities and long communication distances, making it suitable for power line carrier communication. RS485 communication uses the RS485-DIP-11-1 communication chip, which features long transmission distances and strong anti-interference capabilities, making it suitable for industrial fieldbus communication. Infrared communication module 3 is used for short-range data exchange and parameter setting, facilitating operation by field maintenance personnel.

[0026] Specifically, MCU module 1 is connected to power module 4, which uses a constant voltage switching power supply chip, characterized by high efficiency and good stability. Power module 4 outputs multiple power supplies, including two 12V power supplies, one RS485 power supply, and two 3.3V power supplies. The two 12V power supplies are used to drive the relay and G3-PLC communication module 3 respectively, the one RS485 power supply is dedicated to powering the RS485 communication module 3, and the two 3.3V power supplies power MCU module 1 and other low-voltage digital circuits respectively.

[0027] In addition, MCU module 1 is also connected to storage module 5, which uses 4MB of SPI FLASH memory and 512KB of EEP memory. SPI FLASH memory is used to store program code, communication protocol stack, and historical data records, featuring large capacity and fast read / write speed. EEP memory is used to store key parameters and metering data, featuring data retention even when power is lost, ensuring that the meter retains important information even during power outages.

[0028] Meanwhile, MCU module 1 is connected to peripheral module 6, which includes a relay control module, a buzzer driver module, indicator lights, and a cover opening detection module. The relay control module controls the on / off state of the circuit to realize the prepaid function; the buzzer driver module provides audible prompts, such as low balance warnings and operation confirmations; the indicator lights display the meter's operating status, such as power indication, communication status, and alarm status; and the cover opening detection module detects whether the meter casing has been opened to prevent illegal operation and electricity theft.

[0029] As can be seen, the metering module 2 includes an EMU module integrated within the MCU module 1. The EMU module uses a resistor divider for two-channel current sampling: one channel uses shunt sampling, and the other uses CT sampling. Shunt sampling is used to measure small currents and features high accuracy; CT sampling is used to measure large currents and features a wide measurement range. The combined use of the two sampling channels can cover a wider current measurement range and improve metering accuracy.

[0030] In addition, MCU module 1 can be further selected as the HT5017 model.

[0031] In summary, the principle of this embodiment is as follows: using the HT5XXX model single-phase power metering SoC chip as the core of MCU module 1, and integrating metering module 2, to achieve high hardware integration of power measurement and control, reduce system complexity, and the metering module supports wide-range current detection by using resistor voltage divider technology, combined with shunt sampling direct current measurement and CT sampling non-contact current transformer measurement, thereby improving metering accuracy and adaptability.

[0032] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0033] Although this document frequently uses terms such as MCU module 1, metering module 2, communication module 3, power supply module 4, storage module 5, and peripheral module 6, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A rail-mounted G3PLC prepaid meter, comprising an MCU module (1), wherein the MCU module (1) is connected to a metering module (2) and a communication module (3), characterized in that, The communication module (3) adopts any one or more combinations of G3-PLC communication, RS485 communication and infrared communication. The MCU module (1) is selected as a single-phase power metering SoC chip of model HT5XXX. The metering module (2) is integrated in the MCU module (1).

2. The rail-mounted G3PLC prepaid meter according to claim 1, characterized in that, The MCU module (1) is connected to a power supply module (4), and the power supply module (4) uses a constant voltage switching power supply chip.

3. A rail-mounted G3PLC prepaid meter according to claim 2, characterized in that, The power module (4) outputs two 12V power supplies, one RS4585 power supply, and two 3.3V power supplies.

4. A rail-mounted G3PLC prepaid meter according to claim 1, characterized in that, The MCU module (1) is connected to a storage module (5).

5. A rail-mounted G3PLC prepaid meter according to claim 4, characterized in that, The storage module (5) uses a 4MB SPI FLASH memory and a 512KB EEP memory.

6. A rail-mounted G3PLC prepaid meter according to claim 1, characterized in that, The MCU module (1) is connected to an external module (6), which includes a relay control module, a buzzer driver module, an indicator light, and a cover opening detection module.

7. A rail-mounted G3PLC prepaid meter according to claim 1, characterized in that, The metering module (2) includes an EMU module integrated within the MCU module (1).

8. A rail-mounted G3PLC prepaid meter according to claim 7, characterized in that, The EMU module uses a resistor divider to sample two current channels, one for shunt sampling and the other for CT sampling.

9. A rail-mounted G3PLC prepaid meter according to claim 1, characterized in that, The MCU module (1) mentioned above is the HT5017 model.

10. A rail-mounted G3PLC prepaid meter according to claim 1, characterized in that, The communication module (3) uses an XZ1559BP-NC communication chip for G3-PLC communication and an RS485-DIP-11-1 communication chip for RS485 communication.

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