Wall-mounted intelligent electric meter based on WIFI and Bluetooth communication

Abstract

The utility model relates to the technical field of intelligent electric meters, in particular to a wall-mounted intelligent electric meter based on WIFI (Wireless Fidelity) and Bluetooth communication, which comprises an electric meter metering module, a voltage acquisition circuit, a current acquisition circuit, an overvoltage and undervoltage detection circuit, a controllable power supply, a Bluetooth module, a WIFI communication module and an LCD (Liquid Crystal Display) display circuit, the voltage acquisition circuit and the controllable power supply are respectively connected with the AC power supply line and the ammeter metering module, the current acquisition circuit is respectively connected with a live wire of the AC power supply line and the ammeter metering module, and the metering module is respectively connected with the Bluetooth module, the WIFI communication module, the overvoltage and undervoltage detection circuit and the LED display circuit. In addition to an electricity metering function, the intelligent electricity meter also has intelligent functions such as a power failure alarm function, a WIFI communication technology, a user side control function, a bidirectional data communication function of multiple data transmission modes, an electricity larceny prevention function and the like, so that a user can know the power supply condition in time, remotely control the power supply and power failure of the electricity meter and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of smart electric meters, in particular to a wall-mounted smart electric meter based on WIFI and Bluetooth communication. Background Art

[0002] The existing smart meters are smart terminals of smart grids. In addition to the basic electricity consumption metering function of traditional energy meters, in order to adapt to the use of smart grids and new energy, smart meters also have intelligent functions such as two-way multi-rate metering function, user-side control function, two-way data communication function with multiple data transmission modes, and anti-electricity theft function. Most of the current meters can only measure electricity, and some only have wireless or wired transmission functions. These general meters can only meet the electricity needs of regular users. Now with the diversification of electricity consumption, there are more and more application occasions such as temporary or long-term electricity rental for equipment and temporary electricity rental for residents. The power supplier is no longer limited to the power supply bureau, but may be ordinary people. Traditional general meters are no longer suitable for these power suppliers who need to know the power supply situation and power supply location in time, and need to remotely control power outage or power supply.

[0003] As disclosed in Chinese patent CN216350928U, published on April 19, 2022, the utility model discloses a wall-mounted smart meter, including a smart meter body, the smart meter body is mounted on the wall through a wall mount, the wall mount is divided into a U-shaped plate, an L-shaped plate, a fixing device and a rotating device; the upper rear side of the smart meter body is placed in the U-shaped plate, the U-shaped plate clamps the smart meter body through a rotating device, the rear side of the U-shaped plate is installed with an L-shaped plate, and the L-shaped plate is hung on the wall through a fixing device; the U-shaped groove is opened on the left side of the U-shaped plate, the bearing is installed in the U-shaped groove, the rotating shaft is installed in the inner ring of the bearing, and the left side of the cam is installed on the front outer wall of the rotating shaft. Although this solution can be conveniently adjusted and clamped according to the model size of the smart meter, and is highly usable, it still cannot solve the problem that the existing various types of power suppliers can timely understand the power supply situation, power supply location and remotely control power off or power supply. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model proposes a wall-mounted smart meter based on WIFI and Bluetooth communication, including a meter measurement module, a voltage acquisition circuit, a current acquisition circuit, an over-voltage and under-voltage detection circuit, a controllable power supply, a Bluetooth module, a WIFI communication module, and an LCD display circuit. The voltage acquisition circuit and the controllable power supply are respectively connected to the AC power supply line and the meter measurement module, the current acquisition circuit is respectively connected to the live wire of the AC power supply line and the meter measurement module, and the meter module is respectively connected to the Bluetooth module, the WIFI communication module, the over-voltage and under-voltage detection circuit, and the LCD display circuit. In addition to the electricity metering function, the wall-mounted smart meter based on WIFI and Bluetooth communication of the present application also includes intelligent functions such as power failure alarm function, WIFI communication technology, user-side control function, two-way data communication function of multiple data transmission modes, and anti-electricity theft function, which can enable users to timely understand the power supply situation and remotely control the power supply and power failure of the meter.

[0005] Preferably, the electric meter measurement module includes an electric energy measurement SOC chip U3, the LDO33 pin of the chip U3 is externally connected to a parallel capacitor C31, the capacitor C32 is grounded, the P00 port and the P01 port are connected to a controllable power supply, the UP, UN pins, the IAP pin, and the IAN pin are connected to a current acquisition circuit, the REFV pin of the chip U3 is externally connected to a parallel capacitor C29, a capacitor C30 and grounded, the VCC pin is connected to a power supply, the XO pin is connected to the X1 pin through a crystal oscillator Y1, the LDO18 pin is grounded through a capacitor C27, and the SE The G1 pin and the COM port are connected to the LCD display circuit, LCDVP1 and LCDVP2 are connected through capacitor C35, the LCDVA pin, LCDVB pin, LCDVC pin and LCDVD pin are grounded through capacitors C26, C24, C25 and C23 respectively, the TX0 pin and the RX0 pin are connected to the WIFI communication module, the TX1 pin and the RX1 pin are connected to the Bluetooth module, and the P11KEY1 pin, P30 pin, P32 pin and RF pin are connected to the LCD display circuit.

[0006] Preferably, the WIFI communication module includes a chip M1, the TXD0 pin of the chip M1 is connected to the RX0 pin of the chip U3, the RXD0 pin is connected to the TX0 pin of the chip U3, the RST pin of the chip M1 outputs an RST reset signal through a resistor R48, the RST pin is grounded through a capacitor C33, the RST pin is connected to the power supply through a resistor R17, the EN pin is grounded through a capacitor C34, the EN pin is connected to the power supply through a resistor R18, the VCC pin is connected to the power supply, the VCC pin is connected to the ground after being connected in parallel with the capacitor C18 and the capacitor C20, the GND pin is grounded, the GPIO15 pin is grounded through a resistor R20, and the GPIO0 pin is connected to the power supply through a resistor R21.

[0007] Preferably, the voltage acquisition circuit includes a resistor R19, a resistor R21, a resistor R22, a resistor R23, a resistor R25, a resistor R26, a resistor R27 and a capacitor C16, one end of the resistor R19 is connected to the live wire of the AC power supply line, the other end of the resistor R19 is connected in series with the resistor R21, the resistor R22, the resistor R23, the resistor R25 and the resistor R26, the other end of the resistor R26 is connected to the UP pin of the metering chip U3, the resistor R27 is connected in parallel with the capacitor C16, one end is connected to the UN pin of the metering chip U3, and the other end is connected to the current acquisition circuit.

[0008] Preferably, the current acquisition circuit includes a current limiting resistor R13, a resistor R14, a resistor R16, a resistor R24, a capacitor C13, a capacitor C14, a capacitor C15 and a relay module K1, the two ends of the current limiting resistor R13 are connected to the current, one end of the resistor R13 is connected to pin 3 of the relay module K1, and the other end is connected to pin 2 of the relay module K1, pin 1 of the relay module K1 is grounded, pin 3 of the relay module K1 is connected to one end of the resistor R14, the other end of the resistor R14 is respectively connected to the IAP pin of the chip U3 and the capacitor C15, pin 2 of the relay module K1 is connected to one end of the resistor R16, and the other end of the resistor R16 is respectively connected to the IAN pin of the chip U3 and the capacitor C14, the other ends of the capacitor C15 and the capacitor C14 are both grounded, and the resistor R24 ​​is connected in parallel with the capacitor C13, and the current is connected to one end, and the other end is grounded.

[0009] Preferably, the Bluetooth module comprises a chip U8, and the chip U8 is connected to the TX1 pin and the RX1 pin of the chip U3 in sequence through the RXD pin and the TXD pin.

[0010] Preferably, the model of the electric energy metering SOC chip is RN8211B.

[0011] The beneficial effects of the utility model are:

[0012] 1. The smart meter of the utility model has complete meter functions and can realize the metering of electricity consumption of the electricity user. The Zhengnan meter also includes WIFI short-range communication technology. Users can obtain meter data remotely through the server or through short-range communication.

[0013] 2. The smart meter of the utility model is integrated with a Bluetooth module, which can be used for users to charge through Bluetooth matching at close range when the network is disconnected, to prevent disconnection and inability to charge through the user end, especially for applications in complex environments such as poor WIFI network signals.

[0014] 3. It contains a power failure alarm function, which is convenient for the power supplier and the power user to understand the current power supply status at any time. If there is a line failure, it can be restored in time. At the same time, it includes remote opening and closing of the switch, which is convenient for the power supplier to cut off or restore the power supply to the power user at any time. It also includes a temporary overdraft function to prevent the phenomenon that the electricity fee is exhausted and the user forgets to charge and cannot use it. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings:

[0016] Figure 1 This is a circuit connection block diagram of a wall-mounted smart meter based on WIFI and Bluetooth communication according to an embodiment of the utility model;

[0017] Figure 2 A circuit diagram of an electric meter measuring module according to an embodiment of the present utility model;

[0018] Figure 3 A circuit diagram of a WIFI communication module according to an embodiment of the present utility model;

[0019] Figure 4 A circuit diagram of a voltage acquisition circuit according to an embodiment of the present utility model;

[0020] Figure 5 A circuit diagram of a current acquisition circuit according to an embodiment of the present utility model;

[0021] Figure 6 This is a circuit diagram of a Bluetooth module according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0022] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment of the utility model, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0023] In order to solve the above technical problems, the utility model adopts the following technical solutions: a wall-mounted smart meter based on WIFI and Bluetooth communication, such as Figure 1 As shown, it includes an electric meter measurement module 1, a voltage acquisition circuit 2, a current acquisition circuit 3, an over-voltage and under-voltage detection circuit 4, a controllable power supply 5, a Bluetooth module 6, a WIFI communication module 7, and an LCD display circuit 8. The voltage acquisition circuit 2 and the controllable power supply 5 are respectively connected to the AC power supply line and the electric meter measurement module 1, the current acquisition circuit 3 is respectively connected to the live wire of the AC power supply line and the electric meter measurement module 1, and the measurement module 1 is respectively connected to the Bluetooth module 6, the WIFI communication module 7, the over-voltage and under-voltage detection circuit 4, and the LED display circuit 8.

[0024] Specifically, Figure 2 As shown, the electric meter measurement module 1 includes an electric energy measurement SOC chip U3, the model of the chip U3 is RN8211B, the LDO33 pin of the chip U3 is externally connected to a parallel capacitor C31, the capacitor C32 is grounded, the P00 port and the P01 port are connected to a controllable power supply 5, the UP, UN pins, the IAP pin, and the IAN pin are connected to a current acquisition circuit 3, the REFV pin of the chip U3 is externally connected to a parallel capacitor C29, a capacitor C30 and grounded, the VCC pin is connected to the power supply, the XO pin is connected to the X1 pin through the crystal oscillator Y1, and the LDO18 pin is connected to the ground, SEG1 pin and COM port are connected to LCD display circuit 8, LCDVP1 and LCDVP2 are connected through capacitor C35, LCDVA pin, LCDVB pin, LCDVC pin and LCDVD pin are grounded through capacitor C26, capacitor C24, capacitor C25 and capacitor C23 respectively, TX0 pin and RX0 pin are connected to WIFI communication module 7, TX1 pin and RX1 pin are connected to Bluetooth module 6, P11KEY1 pin, P30 pin, P32 pin and RF pin are connected to LCD display circuit 8.

[0025] like Figure 3 As shown, the WIFI communication module 7 includes a chip M1, a TXD0 pin of the chip M1 is connected to the RX0 pin of the chip U3, the RXD0 pin is connected to the TX0 pin of the chip U3, the RST pin of the chip M1 outputs an RST reset signal through a resistor R48, the RST pin is grounded through a capacitor C33, the RST pin is connected to the power supply through a resistor R17, the EN pin is grounded through a capacitor C34, the EN pin is connected to the power supply through a resistor R18, the VCC pin is connected to the power supply, the VCC pin is connected to the ground after being connected in parallel with the capacitor C18 and the capacitor C20, the GND pin is grounded, the GPIO15 pin is grounded through a resistor R20, and the GPIO0 pin is connected to the power supply through a resistor R21.

[0026] like Figure 4 As shown, the voltage acquisition circuit 2 includes a resistor R19, a resistor R21, a resistor R22, a resistor R23, a resistor R25, a resistor R26, a resistor R27 and a capacitor C16, one end of the resistor R19 is connected to the live wire of the AC power supply line, the other end of the resistor R19 is connected in series with the resistor R21, the resistor R22, the resistor R23, the resistor R25 and the resistor R26, the other end of the resistor R26 is connected to the UP pin of the metering chip U3, the resistor R27 is connected in parallel with the capacitor C16, one end is connected to the UN pin of the metering chip U3, and the other end is connected to the current acquisition circuit 3.

[0027] like Figure 5As shown, the current acquisition circuit 3 includes a current limiting resistor R13, a resistor R14, a resistor R16, a resistor R24, a capacitor C13, a capacitor C14, a capacitor C15 and a relay module K1. The two ends of the current limiting resistor R13 are connected to the current. One end of the resistor R13 is connected to the 3-pin of the relay module K1, and the other end is connected to the 2-pin of the relay module K1. The 1-pin of the relay module K1 is grounded. The 3-pin of the relay module K1 is connected to one end of the resistor R14, and the other end of the resistor R14 is respectively connected to the IAP pin of the chip U3 and the capacitor C15. The 2-pin of the relay module K1 is connected to one end of the resistor R16, and the other end of the resistor R16 is respectively connected to the IAN pin of the chip U3 and the capacitor C14. The other ends of the capacitors C15 and C14 are both grounded. After the resistor R24 ​​is connected in parallel with the capacitor C13, the current is connected to one end, and the other end is grounded.

[0028] like Figure 6 As shown, the Bluetooth module 6 includes a chip U8, and the chip U8 is connected to the TX1 pin and the RX1 pin of the chip U3 via the RXD pin and the TXD pin in sequence.

[0029] The beneficial effects of this embodiment are:

[0030] 1. The smart meter of this embodiment has complete meter functions and can realize the metering of electricity consumption of the electricity user. The Zhengnan meter also includes WIFI short-range communication technology. Users can remotely obtain meter data through the server or obtain meter data through short-range communication.

[0031] 2. The smart meter of this embodiment is integrated with a Bluetooth module, which can be used for users to charge through Bluetooth matching at close range when the network is disconnected, to prevent disconnection and inability to charge through the user end, especially for applications in complex environments such as poor WIFI network signals.

[0032] 3. It contains a power failure alarm function, which is convenient for the power supplier and the power user to understand the current power supply status at any time. If there is a line failure, it can be restored in time. At the same time, it includes remote opening and closing of the switch, which is convenient for the power supplier to cut off or restore the power supply to the power user at any time. It also includes a temporary overdraft function to prevent the phenomenon that the electricity fee is exhausted and the user forgets to charge and cannot use it.

[0033] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention shall be included in the scope of the claims.

Claims

1. A wall-mounted smart meter based on WIFI and Bluetooth communication, characterized in that: The invention comprises an electric meter measurement module (1), a voltage acquisition circuit (2), a current acquisition circuit (3), an over-voltage and under-voltage detection circuit (4), a controllable power supply (5), a Bluetooth module (6), a WIFI communication module (7), and an LCD display circuit (8); the voltage acquisition circuit (2) and the controllable power supply (5) are respectively connected to an AC power supply line and the electric meter measurement module (1); the current acquisition circuit (3) is respectively connected to a live wire of the AC power supply line and the electric meter measurement module (1); and the measurement module (1) is respectively connected to the Bluetooth module (6), the WIFI communication module (7), the over-voltage and under-voltage detection circuit (4), and the LCD display circuit (8).

2. A wall-mounted smart meter based on WIFI and Bluetooth communication according to claim 1, characterized in that: The electric meter measurement module (1) comprises an electric energy measurement SOC chip U3, the LDO33 pin of the chip U3 is externally connected to a parallel capacitor C31, the capacitor C32 is grounded, the P00 port and the P01 port are connected to a controllable power supply (5), the UP pin, the UN pin, the IAP pin, and the IAN pin are connected to a current acquisition circuit (3), the REFV pin of the chip U3 is externally connected to a parallel capacitor C29 and a capacitor C30 and is grounded, the VCC pin is connected to a power supply, the XO pin and the X1 pin are connected via a crystal oscillator Y1, the LDO18 pin is grounded via a capacitor C27, and the SEG1 pin is connected to a current acquisition circuit (3). The COM port is connected to an LCD display circuit (8), LCDVP1 and LCDVP2 are connected via a capacitor C35, LCDVA pin, LCDVB pin, LCDVC pin and LCDVD pin are grounded via capacitors C26, C24, C25 and C23 respectively, TX0 pin and RX0 pin are connected to a WIFI communication module (7), TX1 pin and RX1 pin are connected to a Bluetooth module (6), and P11KEY1 pin, P30 pin, P32 pin and RF pin are connected to an LCD display circuit (8).

3. A wall-mounted smart meter based on WIFI and Bluetooth communication according to claim 1, characterized in that: The WIFI communication module (7) comprises a chip M1, a TXD0 pin of the chip M1 is connected to the RX0 pin of the chip U3, the RXD0 pin is connected to the TX0 pin of the chip U3, an RST pin of the chip M1 outputs an RST reset signal via a resistor R48, the RST pin is grounded via a capacitor C33, the RST pin is connected to a power supply via a resistor R17, an EN pin is grounded via a capacitor C34, the EN pin is connected to a power supply via a resistor R18, a VCC pin is connected to a power supply, the VCC pin is connected to a ground via a capacitor C18 and a capacitor C20 in parallel, a GND pin is grounded, a GPIO15 pin is grounded via a resistor R20, and a GPIO0 pin is connected to a power supply via a resistor R21.

4. A wall-mounted smart meter based on WIFI and Bluetooth communication according to claim 1, characterized in that: The voltage acquisition circuit (2) comprises a resistor R19, a resistor R21, a resistor R22, a resistor R23, a resistor R25, a resistor R26, a resistor R27 and a capacitor C16, one end of the resistor R19 is connected to the live wire of the AC power supply line, the other end of the resistor R19 is connected in series with the resistors R21, R22, R23, R25 and R26, the other end of the resistor R26 is connected to the UP pin of the metering chip U3, one end of the resistor R27 connected in parallel with the capacitor C16 is connected to the UN pin of the metering chip U3, and the other end is connected to the current acquisition circuit (3).

5. The wall-mounted smart meter based on WIFI and Bluetooth communication according to claim 1, characterized in that: The current acquisition circuit (3) comprises a current limiting resistor R13, a resistor R14, a resistor R16, a resistor R24, a capacitor C13, a capacitor C14, a capacitor C15 and a relay module K1, the two ends of the current limiting resistor R13 are connected to current, one end of the resistor R13 is connected to pin 3 of the relay module K1, and the other end is connected to pin 2 of the relay module K1, pin 1 of the relay module K1 is grounded, pin 3 of the relay module K1 is connected to one end of the resistor R14, the other end of the resistor R14 is respectively connected to the IAP pin of the chip U3 and the capacitor C15, pin 2 of the relay module K1 is connected to one end of the resistor R16, the other end of the resistor R16 is respectively connected to the IAN pin of the chip U3 and the capacitor C14, the other ends of the capacitors C15 and C14 are both grounded, and the resistor R24 ​​is connected in parallel with the capacitor C13, one end of which is connected to current, and the other end is grounded.

6. A wall-mounted smart meter based on WIFI and Bluetooth communication according to claim 1, characterized in that: The Bluetooth module (6) comprises a chip U8, and the chip U8 is connected to the TX1 pin and the RX1 pin of the chip U3 in sequence through the RXD pin and the TXD pin.

7. A wall-mounted smart meter based on WIFI and Bluetooth communication according to claim 2, characterized in that: The model of the electric energy metering SOC chip is RN8211B.

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