Novel multifunctional power monitoring device

Abstract

The utility model discloses a novel multifunctional electric power monitoring device, which relates to the technical field of electric power monitoring and comprises a signal acquisition module, a special electric energy metering chip module, a microcontroller module, a parameter display module and a key module. The acquisition modules are respectively used for acquiring voltage and current signals; the special electric energy metering chip module performs signal transmission with the microcontroller module through an SPI (Serial Peripheral Interface) provided by the special electric energy metering chip module; the key module is used for calibrating the voltage transformer and the current transformer, initialization operation is started through the system, the microcontroller module executes an initialization program, internal existing data are refreshed and reset, the accuracy and reliability of the data are ensured, meanwhile, the system evaluates the current running state, and the current running state of the voltage transformer and the current transformer is evaluated. And whether the voltage transformer or the current transformer needs to be calibrated is judged, so that the stability of equipment is ensured.

Description

Technical Field

[0001] This utility model relates to the field of power monitoring technology, and in particular to a novel multifunctional power monitoring device. Background Technology

[0002] Power monitoring devices are used to monitor power systems and other locations that require electricity. They can monitor the condition of different circuits in real time, preventing fires caused by short circuits and increasing circuit safety. In practical applications, power monitoring devices typically require the following technologies:

[0003] Sensor modules are used to measure voltage signals in power systems;

[0004] The signal conditioning circuit amplifies, filters, isolates, and processes the weak signal output by the sensor.

[0005] The analog-to-digital conversion module processes and analyzes data from the digital signal processor.

[0006] The processing module processes, analyzes, and stores measurement data.

[0007] Accurately measure parameters such as voltage amplitude, effective value, and frequency of each phase in the power system to reflect the power supply quality of the power grid. Measure active power, that is, the power actually consumed on the load, to evaluate the energy consumption of equipment and the power supply efficiency of the power grid.

[0008] Among them, power monitoring instruments widely adopt the AD+MCU mode, that is, an external analog-to-digital converter chip and an 8-bit or 16-bit microcontroller are used to collect three-phase power grid data. This power monitoring method has many drawbacks, such as the chip function being limited, requiring a large number of peripheral expansion devices, and the software program algorithm being complex and the measurement accuracy being low. Utility Model Content

[0009] To address the shortcomings of existing technologies, this utility model provides a novel multifunctional power monitoring device that solves the problem of using the AD+MCU mode, i.e., external analog-to-digital converter chip and 8-bit or 16-bit microcontroller to collect three-phase power grid data. This power monitoring method has many drawbacks, such as the chip having a single function, requiring a large number of peripheral expansion devices, and having technical problems such as complex software program algorithms and low measurement accuracy.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A novel multifunctional power monitoring device includes a signal acquisition module, a dedicated power metering chip module, a microcontroller module, a parameter display module, and a button module. The signal acquisition module includes a voltage transformer and a current transformer, which are used to acquire voltage and current signals, respectively. The dedicated power metering chip module transmits signals to the microcontroller module through its own SPI port. The button module is used to calibrate the voltage transformer and the current transformer.

[0012] Preferably, the dedicated energy metering chip module is an ATT7022E three-phase energy dedicated metering chip, the microcontroller module is an STM32 microcontroller, the parameter display module is a 1602 LCD liquid crystal display screen, one end of the signal acquisition module is connected to the power supply through a wiring harness, and the microcontroller module and the parameter display module are connected in series through wiring harnesses.

[0013] This utility model has the following beneficial effects:

[0014] 1. By using a high-performance microcontroller and a dedicated power metering chip to acquire and process current and voltage signals, the overall hardware design of the monitoring device is made simpler, and the processing performance of the power monitoring device is improved.

[0015] 2. Upon system startup, the microcontroller module executes the initialization program, refreshing and clearing existing internal data to ensure data accuracy and reliability. Simultaneously, the system assesses the current operating status to determine whether voltage or current transformers need calibration, ensuring equipment stability. Attached Figure Description

[0016] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

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

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

[0019] Figure 3 This is the control flowchart of this utility model. Detailed Implementation

[0020] This application provides a novel multifunctional power monitoring device that effectively solves the problem of the drawbacks of using the AD+MCU mode, which involves external analog-to-digital converter chips and 8-bit or 16-bit microcontrollers to collect three-phase power grid data. These drawbacks include the limited functionality of the chip, the need for extensive external expansion components, complex software algorithms, and low measurement accuracy. By employing a high-performance microcontroller and a dedicated power metering chip to collect and process current and voltage signals, the overall hardware design of the monitoring device is simplified, and the processing performance of the power monitoring device is improved. Example

[0021] like Figure 1 , Figure 2 , Figure 3 As shown, the technical solution in this application embodiment effectively solves the problem of the AD+MCU mode, which uses an external analog-to-digital converter chip and an 8-bit or 16-bit microcontroller to collect three-phase power grid data. This power monitoring method has many drawbacks, such as the chip having a single function, requiring a large number of peripheral expansion devices, and having complex software algorithms and low measurement accuracy. The overall approach is as follows:

[0022] To address the problems existing in the prior art, this utility model provides a novel multifunctional power monitoring device, including a signal acquisition module, a dedicated energy metering chip module, a microcontroller module, a parameter display module, and a button module. The signal acquisition module includes voltage transformers and current transformers, used to acquire voltage and current signals respectively. The dedicated energy metering chip module transmits signals to the microcontroller module through its own SPI port. The dedicated energy metering chip module receives the acquired three-phase voltage and three-phase current signals, processes these signals, including amplification, filtering, and analog-to-digital conversion, to extract accurate voltage and current information, and transmits the processed signals to the microcontroller module through the SPI port. The microcontroller module receives the three-phase voltage and three-phase current signals from the dedicated energy metering chip module, further processes and analyzes these signals, and the button module is used for calibrating the voltage transformers and current transformers.

[0023] The dedicated energy metering chip module is an ATT7022E three-phase energy dedicated metering chip, and the microcontroller module is an STM32 microcontroller. The microcontroller module executes the initialization program to refresh and clear the existing internal data to ensure the accuracy and reliability of the data. The system evaluates the current operating status and determines whether the voltage transformer or current transformer needs to be calibrated. The evaluation criteria may include factors such as the equipment's usage time, the time interval between the last calibration, and changes in the equipment's operating environment. The parameter display module is a 1602 LCD liquid crystal display screen. One end of the signal acquisition module is connected to the power supply via a wiring harness. The microcontroller module and the parameter display module are connected in series via wiring harnesses.

[0024] Working principle:

[0025] The first step is to start the power monitoring device. The system begins initialization, with the microcontroller module executing the initialization program to refresh and clear existing data, ensuring accuracy and reliability. The system then assesses the current operating status to determine if calibration of the voltage or current transformer is necessary. Assessment factors may include equipment usage time, the time interval between the last calibration, and changes in the operating environment. If calibration is required, it is performed via the button module. The user can input calibration commands and parameters using the button module, following the device's prompts. The microcontroller module receives the input commands from the button input. The system receives the input signal from the block and performs corresponding calibration adjustments on the voltage transformer or current transformer according to the calibration instructions. If the judgment result indicates that no calibration of the voltage transformer or current transformer is required, the system enters the signal acquisition stage. The voltage transformer acquires the three-phase voltage signal and converts the high voltage into a low voltage signal suitable for subsequent processing. The current transformer acquires the three-phase current signal and converts the large current into a small current signal. The dedicated energy metering chip module receives the acquired three-phase voltage and three-phase current signals and processes these signals, including amplification, filtering, analog-to-digital conversion, etc., to extract accurate voltage and current information. The processed signal is transmitted to the microcontroller module through the SPI port. The microcontroller module receives the three-phase voltage and three-phase current signals from the dedicated energy metering chip module, further processes and analyzes these signals, calculates parameters such as voltage and current, and transmits the calculated parameters to the parameter display. The parameter display shows the voltage, current, and other parameters, completing one monitoring cycle.

[0026] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A novel multifunctional power monitoring device, comprising a signal acquisition module, a dedicated power metering chip module, a microcontroller module, a parameter display module, and a button module, characterized in that, The signal acquisition module includes a voltage transformer and a current transformer, which are used to acquire voltage and current signals, respectively; the dedicated energy metering chip module transmits signals to the microcontroller module through its own SPI port; the button module is used to calibrate the voltage transformer and the current transformer.

2. The novel multifunctional power monitoring device as described in claim 1, characterized in that, The dedicated power metering chip module is the ATT7022E three-phase power metering chip.

3. The novel multifunctional power monitoring device as described in claim 1, characterized in that, The microcontroller module is an STM32 microcontroller.

4. A novel multifunctional power monitoring device as described in claim 1, characterized in that, The parameter display module is a 1602 LCD liquid crystal display screen.

5. A novel multifunctional power monitoring device as described in claim 1, characterized in that, One end of the signal acquisition module is connected to the power supply via a wiring harness.

6. A novel multifunctional power monitoring device as described in claim 1, characterized in that, The microcontroller module and the parameter display module are connected in series via a wiring harness.

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