A 4G three-phase prepaid energy meter

Abstract

The utility model provides a 4G three-phase prepaid energy meter, including MCU, signal sampling unit, data communication unit, AC / DC power supply; the signal sampling unit transmits the acquired current data and voltage data to the MCU, the signal sampling unit adopts HT7136 of Juquan, the signal sampling module is connected with the current signal sampling module and the voltage signal sampling module, the current signal sampling module includes a current transformer and a differential sampling circuit per phase, the current transformer transmits the acquired current data to the signal sampling unit, and the voltage signal sampling module has six voltage-dividing resistors and a differential sampling circuit per phase. The present invention uses 4G communication technology to remotely transmit data to the big data cloud platform, so that the user's experience is very satisfactory, and the user can timely and completely control the meter and view the meter data without leaving home.

Description

Technical Field

[0001] The utility model relates to the technical field of high-precision electric energy measurement, in particular to a 4G three-phase prepaid electric energy meter. Background Art

[0002] At present, most three-phase prepaid energy meters on the market use two methods: local and remote. Local electricity sales mostly use card and socket contact electricity sales and Bluetooth technology for contactless electricity sales, which is inconvenient for users to operate. They must go to a special electricity sales department to purchase electricity and keep the electricity sales card to prevent loss. The card replacement process is cumbersome. Bluetooth communication electricity sales also have distance and mobile phone intelligence restrictions. Remote electricity sales mostly use 485 bus and then transmit the background electricity sales through wireless collectors or concentrators. The terminal meter needs on-site construction wiring, which has a large investment cost, and data transmission also has safety hazards caused by poor wiring contact. Utility Model Content

[0003] The utility model aims to provide a 4G three-phase prepaid energy meter, which can conveniently and quickly perform electricity sales and meter reading operations.

[0004] To achieve the above objectives, the utility model proposes the following technical solution: a 4G three-phase prepaid energy meter, comprising:

[0005] MCU;

[0006] A signal sampling unit, the signal sampling unit transmits the acquired current data and voltage data to the MCU, the signal sampling module is connected with a current signal sampling module and a voltage signal sampling module, each phase of the current signal sampling module includes a current transformer and a differential sampling circuit, the current transformer transmits the acquired current data to the signal sampling unit, and each phase of the voltage signal sampling module has six voltage-dividing resistors and a differential sampling circuit;

[0007] A data communication unit, the data communication unit includes a 485 wired communication module and a 4G wireless communication module, and the 4G wireless communication module transmits data to a big data cloud platform;

[0008] AC / DC power supply, the AC / DC power supply supplies power to the MCU and the 485 wired communication module.

[0009] Furthermore, in the present invention, the model of the MCU is V8531.

[0010] Furthermore, in the present invention, the model of the signal sampling module is HT7136.

[0011] Furthermore, in the utility model, the MCU peripherals include EEPROM, FLASH, a clock chip, a display module, an LED indicator light, a button and a battery power supply circuit.

[0012] Furthermore, in the present invention, the display module is an LCD display screen, and the number of the buttons is 4.

[0013] Beneficial effects: The technical solution of this application has the following technical effects:

[0014] The present invention uses 4G communication technology to remotely transmit data to a big data cloud platform, so that users can have a very satisfactory experience. They can timely and completely control the electric meter and view the electric meter data without leaving home.

[0015] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, may be considered part of the inventive subject matter of the present disclosure, provided such concepts are not mutually inconsistent.

[0016] The foregoing and other aspects, embodiments and features of the present invention can be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as the features and / or beneficial effects of the exemplary embodiments, will be apparent from the following description or learned from the practice of the specific embodiments according to the teachings of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are not intended to be drawn to scale. In the accompanying drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For the sake of clarity, not every component is labeled in each figure. Now, embodiments of various aspects of the utility model will be described by way of example and with reference to the accompanying drawings, in which:

[0018] Figure 1 It is a schematic diagram of the utility model system.

[0019] Figure 2 This is the current signal sampling circuit diagram of the utility model.

[0020] Figure 3 This is a voltage signal sampling circuit diagram of the utility model.

[0021] Figure 4 This is the MCU circuit diagram of the utility model.

[0022] Figure 5 This is the 485 communication circuit diagram of the utility model.

[0023] Figure 6 This is the 4G communication diagram of the utility model. DETAILED DESCRIPTION

[0024] In order to better understand the technical content of the utility model, specific embodiments are cited and described as follows in conjunction with the accompanying drawings. In this disclosure, various aspects of the utility model are described with reference to the accompanying drawings, and many illustrative embodiments are shown in the accompanying drawings. The embodiments of the present disclosure are not necessarily defined to include all aspects of the utility model. It should be understood that the various concepts and embodiments introduced above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in the utility model are not limited to any implementation method. In addition, some aspects disclosed in the utility model can be used alone, or used in any appropriate combination with other aspects disclosed in the utility model.

[0025] Example 1

[0026] like Figure 1-6 As shown, a 4G three-phase prepaid energy meter includes an MCU, a signal sampling unit, a data communication unit, and an AC / DC power supply;

[0027] The signal sampling unit transmits the acquired current and voltage data to the MCU. The signal sampling unit adopts the HT7136 of Juquan. The HT7136 is a multifunctional high-precision three-phase electric energy dedicated metering chip, which is suitable for three-phase three-wire and three-phase four-wire applications. The HT7136 integrates multiple second-order sigma-delta ADCs, reference voltage circuits, and digital signal processing circuits for all power, energy, effective value, power factor and frequency measurement. It can measure the active power, reactive power, apparent power, active energy and reactive energy of each phase and the combined phase. At the same time, it can also measure the current, voltage effective value, power factor, phase angle, frequency and other parameters of each phase, fully meeting the needs of three-phase multi-rate multi-function electric energy meter.

[0028] The signal sampling module is connected to a current signal sampling module and a voltage signal sampling module. Each phase of the current signal sampling module includes a current transformer and a differential sampling circuit. The current transformer transmits the acquired current data to the signal sampling unit. Each phase of the voltage signal sampling module includes six voltage-dividing resistors and a differential sampling circuit.

[0029] The MCU uses Wan Gao's V8531, which is a highly integrated 32-bit high-speed data processing MCU, using the Cortex-M0 core, with 256KB FLASH, 32KB SRAM, UART / SPI / I2C interface, LCD, WDT and RTC. V8531 supports multiple low-power working modes and supports independent power supply for RTC. MCU peripherals include EEPROM, FLASH, clock chip, LCD display, 4 LED indicators, 4 buttons, battery power supply circuit, system power-off detection, and relay closing and opening detection circuit.

[0030] The data communication unit includes a 485 wired communication module and a 4G wireless communication module. The 4G wireless communication module transmits data to the big data cloud platform. The AC / DC power supply supplies power to the MCU and the 485 wired communication module. The AC / DC power supply is a three-phase switching power supply with an input of 80-450Vac.

[0031] This embodiment uses 4G communication technology to remotely transmit data to the big data cloud platform, so that users can have a very satisfactory experience. Without leaving home, they can timely and completely control the meter and view the meter data.

[0032] The standard parts used in this application document can all be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented through simple programming by technicians in this field, which is common knowledge in the field. This application is mainly used to protect mechanical devices, so this application no longer explains the control method and circuit connection in detail.

[0033] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A 4G three-phase prepaid energy meter, characterized in that: include: MCU; A signal sampling unit, the signal sampling unit transmits the acquired current data and voltage data to the MCU, the signal sampling unit is connected to a current signal sampling module and a voltage signal sampling module, each phase of the current signal sampling module includes a current transformer and a differential sampling circuit, the current transformer transmits the acquired current data to the signal sampling unit, and each phase of the voltage signal sampling module includes six voltage-dividing resistors and a differential sampling circuit; A data communication unit, the data communication unit includes a 485 wired communication module and a 4G wireless communication module, and the 4G wireless communication module transmits data to a big data cloud platform; AC / DC power supply, the AC / DC power supply supplies power to the MCU and the 485 wired communication module.

2. A 4G three-phase prepaid energy meter according to claim 1, characterized in that: The model of the MCU is V8531.

3. A 4G three-phase prepaid energy meter according to claim 1, characterized in that: The model of the signal sampling module is HT7136.

4. A 4G three-phase prepaid energy meter according to claim 1, characterized in that: The MCU peripherals include EEPROM, FLASH, clock chip, display module, LED indicator light, button and battery power supply circuit.

5. A 4G three-phase prepaid energy meter according to claim 4, characterized in that: The display module is an LCD display screen, and the number of the buttons is 4.

Images