Small-size intelligent ammeter and ammeter circuit

Abstract

The utility model relates to a small-size intelligent ammeter and an ammeter circuit. The ammeter circuit comprises an electric energy metering chip integrated with a liquid crystal display driver and a temperature sensor, a liquid crystal display, a transceiver, a relay driving chip and a read-only memory. The relay driving chip, the electric energy metering chip, the read-only memory and the transceiver are in telecommunication connection in sequence; the relay driving chip is in telecommunication connection with the transceiver; the electric energy metering chip is in telecommunication connection with the liquid crystal display. Therefore, a traditional mode of combining a main chip and a metering chip is abandoned, an SOC chip integrating a metering function and a processing function is optimized and adopted, a hardware scheme is simplified, powerful functions are achieved, meanwhile, the miniaturization requirement is considered, and the system is suitable for more intelligent power supply scenes.

Description

Technical Field

[0001] The utility model relates to the technical field of power supplies, in particular to a small-volume intelligent electric meter and an electric meter circuit. Background Art

[0002] There is a contradictory problem between the intellectualization and miniaturization of electric energy meters. For existing electric energy meters, either the configuration is reduced and the functions are simplified to achieve a small volume, or the small volume is sacrificed to pursue sufficient intellectualization and more powerful functions, and it is impossible to have both. Summary of the Utility Model

[0003] Based on this, in view of the above technical problems, it is necessary to provide a small-volume intelligent electric meter and an electric meter circuit, which abandons the traditional method of a main chip + a metering chip, optimizes and adopts an SOC chip integrating metering functions and processing functions, simplifies the hardware solution, takes into account the miniaturization requirements while realizing powerful functions, and is applicable to more intelligent power supply scenarios.

[0004] A small-volume intelligent electric meter circuit, the electric meter circuit includes an electric energy metering chip integrated with a liquid crystal display drive and a temperature sensor, a liquid crystal display, a transceiver, a relay drive chip, and a read-only memory;

[0005] The relay drive chip, the electric energy metering chip, the read-only memory, and the transceiver are sequentially connected by telecommunication;

[0006] The relay drive chip is connected to the transceiver by telecommunication;

[0007] The electric energy metering chip is connected to the liquid crystal display by telecommunication.

[0008] Preferably, the electric energy metering chip is a chip of model G80F923.

[0009] Preferably, the relay drive chip is a chip of model HM8023S.

[0010] Preferably, the transceiver is a chip of model MAX3085.

[0011] Preferably, the read-only memory is a chip of model 24LC02.

[0012] Preferably, the electric meter circuit further includes a primary-side feedback power control chip, a low-dropout linear voltage regulator, and a three-terminal voltage regulator power adjuster. The primary-side feedback power control chip is respectively connected to the low-dropout linear voltage regulator and the three-terminal voltage regulator power adjuster by telecommunication, and the primary-side feedback power control chip is also used to connect to an external power supply;

[0013] The low dropout linear regulator is also connected to the relay driver chip and the electric energy metering chip in a telecommunication manner;

[0014] The three-terminal regulated power supply regulator is also connected to the transceiver in a telecommunication manner.

[0015] Preferably, the primary side feedback power control chip is a chip of model BL8812.

[0016] Preferably, the low dropout linear regulator is a chip of model HT7533.

[0017] Preferably, the three-terminal regulated power supply regulator is a chip of model 78L05.

[0018] A small-sized intelligent electric meter includes the electric meter circuit described in any one of the above.

[0019] In the above-mentioned small-sized intelligent electric meter and electric meter circuit, the electric meter circuit includes an electric energy metering chip integrated with a liquid crystal display driver and a temperature sensor, a liquid crystal display, a transceiver, a relay driver chip, and a read-only memory; the relay driver chip, the electric energy metering chip, the read-only memory, and the transceiver are connected in sequence in a telecommunication manner; the relay driver chip is connected to the transceiver in a telecommunication manner; the electric energy metering chip is connected to the liquid crystal display in a telecommunication manner. Therefore, functions such as metering, temperature detection, liquid crystal display, and large current interruption are integrated into the SOC chip and integrated in a small 2P housing. While achieving powerful functions, it meets the requirements of miniaturization and is applicable to more intelligent power supply scenarios. Description of the Drawings

[0020] Figure 1 It is a structural block diagram of a small-sized intelligent electric meter circuit in an embodiment of the present invention;

[0021] Figure 2 It is a circuit diagram of the electric energy metering chip in an embodiment of the present invention;

[0022] Figure 3 It is a circuit diagram of the relay driver chip in an embodiment of the present invention;

[0023] Figure 4 It is a circuit diagram of the read-only memory in an embodiment of the present invention;

[0024] Figure 5 It is a circuit diagram of the transceiver in an embodiment of the present invention;

[0025] Figure 6 It is a connection circuit diagram of the primary side feedback power control chip and the three-terminal regulated power supply regulator in an embodiment of the present invention;

[0026] Figure 7 The circuit diagram of a low dropout linear regulator and its peripheral circuit in an embodiment of the present utility model;

[0027] Figure 8 The circuit diagram of a liquid crystal display in an embodiment of the present utility model. Specific embodiments

[0028] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the following further details the utility model in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0029] The present utility model provides a small-sized intelligent electric meter circuit, as Figure 1 shown, a small-sized intelligent electric meter circuit includes a power metering chip 102 integrated with a liquid crystal display drive and a temperature sensor, a liquid crystal display 105, a transceiver 104, a relay driver chip 101, and a read-only memory 103. As Figure 1 shown, the relay driver chip 101, the power metering chip 102, the read-only memory 103, and the transceiver 104 are sequentially connected in telecommunication; the relay driver chip 101 is connected to the transceiver 104 in telecommunication; the power metering chip 102 is connected to the liquid crystal display 105 in telecommunication.

[0030] Preferably, as Figure 1 shown, a small-sized intelligent electric meter circuit further includes a primary side feedback power control chip 106, a low dropout linear regulator 107, and a three-terminal voltage regulator 108. The primary side feedback power control chip 106 is respectively connected to the low dropout linear regulator 107 and the three-terminal voltage regulator 108 in telecommunication, and the primary side feedback power control chip 106 is also used to connect to an external power supply; the low dropout linear regulator 107 is also connected to the relay driver chip 101 and the power metering chip 102 in telecommunication; the three-terminal voltage regulator 108 is also connected to the transceiver 104 in telecommunication.

[0031] Preferably, the power metering chip is a chip of model G80F923. Specifically, the circuit diagram of the power metering chip is as Figure 2 shown. The chip of model G80F923 is chip U7.

[0032] Preferably, the relay driver chip is a chip of model HM8023S. Specifically, the circuit diagram of the relay driver chip is as Figure 3As shown. The chip of model HM8023S is chip U2. Pin 1, Pin 2 and Pin 3 of chip U2 are connected to Pin 43 of chip U7, that is, they are all represented by the JDQ_A signal. Pin 6 of chip U2 is connected to Pin 44 of chip U7, that is, they are all represented by the JDQ_B signal.

[0033] Preferably, the read-only memory is a chip of model 24LC02. Specifically, the circuit diagram of the read-only memory is as Figure 4 shown. The read-only memory is chip U1. Pin 5 of chip U1 is connected to Pin 16 of chip U7, that is, they are both the SDA signal. Pin 6 of chip U1 is connected to Pin 15 of chip U7, that is, they are both the SCL signal.

[0034] Preferably, the transceiver is a chip of model MAX3085. Specifically, the circuit diagram of the transceiver is as Figure 5 shown. The transceiver refers to Figure 5 chip U3 and its peripheral circuit diagram in Figure 4 and Figure 5 shown. As shown in

[0035] and

[0036] shown, chip U1 and chip U3 are connected through communication. Chip U1 stores real-time data. When chip U3 cannot directly read the data of chip U7, it can read the data in chip U1 by connecting to chip U7.

[0037] Preferably, the primary side feedback power control chip is a chip of model BL8812.

[0038] Preferably, the low dropout linear regulator is a chip of model HT7533. Figure 6 Specifically, the connection circuit of the primary side feedback power control chip and the three-terminal voltage regulator is as Figure 6 shown. That is, the chip of model BL8812 and its peripheral circuit are the chip UP1 and its peripheral circuit as Figure 6 shown. The chip of model 78L05 and its peripheral circuit are the chip U9 and its peripheral circuit as Figure 7 shown. The low dropout linear regulator and its peripheral circuit are as Figure 7 shown, that is, the chip of model HT7533 and its peripheral circuit are the chip U8 and its peripheral circuit as Figure 6 shown. The voltage input terminal of chip U8 is the VHH terminal, which is connected to the VHH terminal of capacitor C12 as

[0039] Among them, the VHH terminal of chip U8 is connected to the VHH terminal of chip U2, both providing 12V voltage. The VCC terminal of chip U8 is connected to the VCC terminal of chip U7, providing 5V voltage for chip U7. The V485 terminal of chip U9 is connected to the V485 terminal of chip U3, providing 5V voltage for chip U3.

[0040] Preferably, the liquid crystal display 105 is a chip of model JSH109038B. Specifically, as Figure 8 shown, the liquid crystal display is an LCD display, and its pins COM1, COM2, COM3, and COM4 are respectively connected to the pins COM1, COM2, COM3, and COM4 of chip U7.

[0041] The present utility model also provides a small-sized intelligent electric meter. Specifically, a small-sized intelligent electric meter includes the electric meter circuit described in any one of the above.

[0042] The above embodiments only represent several implementation manners of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A small-volume intelligent electric meter circuit, characterized in that: The electric meter circuit includes an electric energy metering chip integrated with a liquid crystal display driver and a temperature sensor, a liquid crystal display, a transceiver, a relay driver chip, and a read-only memory; The relay driving chip, the electric energy metering chip, the read-only memory and the transceiver are connected in telecommunication sequence; The relay driving chip is connected to the transceiver by telecommunication; The electric energy metering chip is electrically connected to the liquid crystal display.

2. The electric meter circuit according to claim 1, characterized in that: The electric energy metering chip is a G80F923 chip.

3. The electric meter circuit according to claim 1, characterized in that: The relay driver chip is a HM8023S chip.

4. The electric meter circuit according to claim 1, characterized in that: The transceiver is a MAX3085 chip.

5. The electric meter circuit according to claim 1, characterized in that: The read-only memory is a 24LC02 chip.

6. The electric meter circuit according to claim 1, characterized in that: The electric meter circuit also includes a primary feedback power control chip, a low voltage drop linear regulator and a three-terminal voltage regulator. The primary feedback power control chip is respectively connected to the low voltage drop linear regulator and the three-terminal voltage regulator. The primary feedback power control chip is also used to connect to an external power supply. The low voltage difference linear regulator is also connected to the relay driving chip and the electric energy metering chip by telecommunication; The three-terminal voltage regulator is also connected to the transceiver in telecommunication.

7. The electric meter circuit according to claim 6, characterized in that: The primary side feedback power control chip is a BL8812 chip.

8. The electric meter circuit according to claim 6, characterized in that: The low voltage dropout linear regulator is a HT7533 chip.

9. The electric meter circuit according to claim 6, characterized in that: The three-terminal voltage regulator is a 78L05 chip.

10. A small-volume intelligent electric meter, characterized in that: An electric meter circuit comprising any one of claims 1-9.

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