CN102103165A - Electricity meter - Google Patents

Abstract

The invention relates to an electric meter, which includes a special metering chip for electric energy, a single-chip microcomputer, a display device, and a communication module. The special metering chip for electric energy collects the corresponding metering data of electric energy parameters; the single-chip microcomputer receives the metering data, stores it in the built-in memory of the single-chip computer, performs simple analysis, judgment and makes control, and at the same time converts the metering data into electricity consumption data and outputs it to the display The device displays and transmits the power consumption data to the communication module; the communication module transmits the power consumption data to the main server of the power company, receives the control command sent by the main server and transmits it to the single-chip microcomputer, and the single-chip microcomputer controls the operating mode of the electric equipment Make adjustments. The invention also relates to a package structure of the electric meter, which assembles each circuit module into a single standard package to form a complete system with high measurement, control and data transmission precision, reduces the volume of the electric meter, and enhances reliability.

Description

electric meter

【Technical field】

The invention relates to an electric meter.

【Background technique】

Research on the improvement of traditional ammeters is in full swing, but a systematic and comprehensive mature solution has not yet been formed. Each product has only a few functions: when some ammeters are designed, the metering that only has active power Time measurement and other functions; some use concentrators or wireless transmission to realize the communication between the meter and the main power station, but the main power station cannot control the electrical equipment according to the actual situation, and cannot achieve the purpose of controlling power consumption.

On the other hand, with the advancement of integrated circuit technology, the improvement of the performance of electronic products, and the enrichment and perfection of functions, consumer products have higher and higher requirements for miniaturization. Existing electric meters are all designed separately for electric energy metering module, control module and wireless communication module, respectively using different chips and peripheral circuits to realize their respective functions.

【Content of invention】

In order to solve the problem that the power station cannot control the electric equipment through the electric meter, and assemble each circuit module of the electric meter into a single standard package, it is necessary to provide an electric meter that can complete the power consumption data measurement, data transmission and real-time control of the electric equipment.

An electric meter, comprising a metering chip dedicated to electric energy, a single-chip microcomputer, a display device, and a communication module; the metering chip dedicated to electric energy is used to sample the current and voltage of electrical equipment to obtain corresponding metering data of electric energy parameters; the single-chip microcomputer is used to Receive the metering data, store it in the built-in memory of the single-chip microcomputer, analyze, judge and make control, and at the same time convert the metering data into power consumption data and output it to the display device for display, and transmit the power consumption data to the communication module; the communication module The power consumption data is sent to the main server of the power company, and the control command sent by the main server is received and sent to the single-chip microcomputer, and the single-chip microcomputer adjusts the operation mode of the electric equipment.

Preferably, the single-chip microcomputer receives metering data through the communication connection of the first serial peripheral device interface, and the power consumption data is transmitted to the communication module through the communication connection of the second serial peripheral device interface, and the first serial Both the peripheral device interface communication connection and the second serial peripheral device interface communication connection include a chip select line CS, a clock line SCLK, a data input line DIN, and a data output line DOUT.

Preferably, the dedicated metering chip for electric energy includes the following pins:

RESET, reset the special metering chip for electric energy;

SIG, when the special metering chip for electric energy is powered on and reset or restarted due to abnormal reasons, SIG becomes low level, and when the single-chip microcomputer writes the meter calibration data through the communication connection of the first serial peripheral device interface, SIG will Immediately become high level;

SEL, the choice of three-phase three-wire and three-phase four-wire;

OSCI, the input terminal of the system crystal oscillator, or the external irrigation system clock input;

OSCO, the output terminal of the system crystal oscillator;

REFOUT, reference voltage output, used as a DC bias for external signals;

REFCAP, output 2.4V reference voltage;

GND, the ground pin of the digital circuit of the dedicated metering chip for electric energy;

AGND, the ground pin of the analog circuit of the dedicated metering chip for electric energy;

VDD, the core power supply of the dedicated metering chip for electric energy, with a rated working voltage of 3V;

AVCC, analog circuit power supply, rated working voltage 5V;

VCC, digital circuit power supply, rated working voltage 5V;

CS, serial peripheral device interface chip select signal, active low;

SCLK, serial peripheral device interface clock input;

DIN, serial peripheral device interface data input;

DOUT, serial peripheral device interface data output;

Revp, when the active power of any phase is detected to be negative, the output is high; when the active power of each phase is detected to be positive, the output is reset to low;

CF1, active energy pulse output, its frequency reflects the magnitude of active power;

CF2, active energy pulse output, its frequency reflects the size of reactive power.

Preferably, the dedicated metering chip for electric energy includes an analog-to-digital conversion module, a reference voltage generation circuit, a digital signal processor, a pulse generator, and a voltage monitoring circuit; converted into a digital signal; the reference voltage generating circuit is used to generate a reference voltage; the digital signal processor is used to measure the electric energy parameter; the pulse generator generates active energy pulse output and reactive energy pulse output for converting After the active energy pulse output or the reactive energy pulse output is connected to the standard electric energy meter, the electric meter is calibrated; the voltage monitoring circuit monitors the voltage VCC of the digital circuit power supply, the voltage AVCC of the analog circuit power supply, and the voltage VDD of the core power supply. monitoring, when any one of the voltages deviates from the rated voltage by 5%, the special metering chip for electric energy will be reset.

Preferably, the single-chip microcomputer monitors the working status of the special metering chip for electric energy through the SIG pin, and the single-chip microcomputer is also connected to the RESET pin of the special metering chip for electric energy to control the reset of the special metering chip for electric energy, so as to ensure that the single-chip microcomputer and electric energy Synchronous work of dedicated metering chips.

Preferably, an analog control switch is provided between the dedicated metering chip for electric energy and the single-chip microcomputer, for controlling whether the metering chip dedicated for electric energy transmits metering data to the single-chip microcomputer.

Preferably, the single-chip microcomputer is also used to control the working mode of the communication module.

Preferably, the single-chip microcomputer is also used to regularly upload the running status of the electric meter itself to the main server through the communication module.

Preferably, the dedicated metering chip for electric energy is a current and voltage transformer for measuring a single-phase circuit or a current and voltage transformer for measuring a three-phase circuit.

Preferably, the dedicated metering chip for electric energy, the single-chip microcomputer, and the communication module adopt a system-in-package structure, and the system-in-package structure includes a substrate and a plurality of gold wires.

Preferably, the single-chip microcomputer and the electric energy metering chip are integrated into a system-on-chip structure.

Preferably, the system-in-package structure is to arrange the three chips of the electric energy metering chip, the single-chip microcomputer and the communication module side by side on the substrate, and the single-chip microcomputer is placed between the other two chips, and are respectively connected to the substrate through the gold wires.

Preferably, in the system-in-package structure, the system-on-chip and the communication module are arranged side by side on the substrate, and are respectively connected to the substrate through gold wires.

Preferably, the system-in-package structure is to stack three chips dedicated to electric energy, a single-chip microcomputer, and a communication module on the substrate in sequence, or stack any two chips on the substrate, and the third chip is parallel to the two chips arranged on the substrate and connected to the substrate through the gold wires respectively.

Preferably, in the system-in-package structure, the system-on-chip is arranged on the substrate, the communication module is stacked on the system-on-chip, and connected to the substrate through gold wires.

Preferably, the system-in-package structure is to stack any two chips among the three chips of the electric energy metering chip, the single-chip microcomputer and the communication module on one side of the substrate, and the third chip is arranged on the other side of the substrate, and pass through the Gold wires are connected to the substrate.

Preferably, in the system-in-package structure, the system-on-chip and the communication module are respectively bonded on the front and back sides of the substrate, and are respectively connected to the substrate through gold wires.

Preferably, the system-in-package structure is provided with openings on the substrate, combined with flip-chip bonding technology, the chip is face down, and a bonding method of depositing tin-lead balls on the front pad of the chip is adopted.

The electric meter mentioned above realizes the real-time control of the power consumption equipment by the power company through the electric meter, and can effectively reduce the burden on the power grid during the peak period of electricity consumption. The system-level packaging structure is adopted to form a complete electric meter with high measurement, control and data transmission accuracy, which reduces the volume of the electric meter and enhances the reliability.

【Description of drawings】

Figure 1 is a schematic diagram of an electric meter.

Figure 2 is a schematic diagram of a dedicated metering chip for electric energy.

Fig. 3 is the first embodiment of the system-in-package structure of the electric meter.

Fig. 4 is a second embodiment of the system-in-package structure of the electric meter.

Fig. 5 is a third embodiment of the system-in-package structure of the electric meter.

【Detailed ways】

Figure 1 is a schematic diagram of an electric meter. The electric meter includes an electric energy dedicated metering chip 102, a single-chip microcomputer 104, a display device 108, and a communication module 110, wherein the electric energy dedicated metering chip 102 and the single-chip microcomputer 104 can be integrated into a system on chip (System on Chip, SOC) 11.

The electric energy metering chip 102 uses current and voltage transformers to sample the current and voltage of the electrical equipment, and converts them into corresponding metering data of various electric energy parameters through internal circuits. The single-chip microcomputer 104 receives the metering data through the first serial peripheral interface (Serial Peripheral Interface, SPI) communication connection, stores it in the built-in memory and converts it into electricity consumption data and outputs it to the display device 108 for display, and performs the metering data Simple analysis, judgment and control, and at the same time, the power consumption data is transmitted to the main server of the power company through the communication module 110, which will further analyze and process the power consumption data and issue control instructions when necessary. After receiving the command, the communication module 110 transmits it to the single chip microcomputer 104, and the single chip microcomputer 104 adjusts the operation mode of the electrical equipment, so as to achieve the purpose of monitoring and managing the electrical equipment.

FIG. 2 is a schematic diagram of an electric energy dedicated metering chip 102 . The function of each pin is shown in the table below.

pin name pin function RESET Reset the special metering chip 102 for electric energy SIG When the electric energy metering chip 102 is powered on and reset or restarted due to abnormal reasons, SIG becomes low level; when the single chip microcomputer 104 writes the meter calibration data through SPI, SIG will immediately become high level SEL Selection of three-phase three-wire and three-phase four-wire OSCI The input terminal of the system crystal oscillator, or the external irrigation system clock input OSCO The output terminal of the system crystal oscillator REFOUT Reference voltage output, used as DC bias for external signals REFCAP Output 2.4V reference voltage GND Grounding pin of 102 digital circuit dedicated electric energy metering chip AGND  Special energy metering chip 102 analog circuit ground pin VDD 102 core power supply for electric energy metering chip, rated working voltage 3V AVCC   Analog circuit power supply, rated working voltage 5V VCC Digital circuit power supply, rated working voltage 5V CS SPI chip select signal, active low SCLK SPI serial clock input DIN SPI serial data input DOUT SPI serial data output Revp When the active power of any phase is detected to be negative, the output is high; when the active power of each phase is detected to be positive, the output is reset to low CF1 Active energy pulse output, its frequency reflects the size of active power CF2 Reactive energy pulse output, its frequency reflects the magnitude of reactive power

The sampling of the input voltage and input current of the electric energy dedicated metering chip 102 uses a current voltage transformer, which isolates the electric energy dedicated metering chip 102 from the power grid, thereby obtaining good anti-interference performance. The energy-specific metering chip 102 is connected to the single-chip microcomputer 104 through four serial peripheral device interface communication lines: a chip select line CS, a clock line SCLK, a data input line DIN, and a data output line DOUT.

The energy-specific metering chip 102 integrates a Δ-Σ analog-to-digital conversion (sinma-delta ADC) module, a reference voltage generating circuit, and a digital signal processor with measurement functions such as power, energy, effective value, power factor, and frequency, and can measure active power. power, reactive power, apparent power, active energy and reactive energy, and can also measure the electric energy parameters of each phase current, voltage effective value, power factor, phase angle, frequency, etc. table requirements. The electric energy metering chip 102 supports gain and phase correction in the full digital domain. The pulse generator generates active energy pulse output CF1 and reactive energy pulse output CF2 to provide instantaneous active and reactive power information. CF1 or CF2 can be directly connected to the standard energy meter, and the meter is calibrated according to the readings of the standard energy meter. The standard watt-hour meter is an watt-hour meter with an accuracy level of more than two thousandths, and is mainly used for calibrating the watt-hour meter. The electric energy metering chip 102 is also equipped with a voltage monitoring circuit to monitor VCC, AVCC, and VDD. When any voltage deviates from the rated voltage by 5%, the electric energy metering chip 102 will be reset. This is beneficial to ensure the normal startup and operation of the electric energy dedicated metering chip 102 when the meter is powered on and off.

The single-chip microcomputer 104 monitors the working state of the electric energy dedicated metering chip 102 through the SIG pin. When the energy-specific metering chip 102 is powered on and reset or restarted due to abnormal reasons, the single-chip microcomputer 104 updates the register data in the electric energy-specific metering chip 102 through the first serial peripheral device interface communication connection to ensure the accuracy of metering. The SIG signal is a handshake signal used to notify the microcontroller 104 . The RESET signal of the special metering chip 102 for electric energy is also controlled by the single-chip microcomputer 104, so that it can be guaranteed that the special metering chip 102 for electric energy or the single-chip microcomputer 104 can work synchronously with the single-chip microcomputer 104 after power-on and reset. The single-chip microcomputer 104 can read out various metering data provided by the electric energy dedicated metering chip 102 in real time through the communication connection of the first serial peripheral device interface and save them in the built-in memory, and perform simple analysis, judgment and analysis on the metering data received. Make control. When the metering data is not within the allowable range of the normal operation of the electrical equipment, the electrical equipment can be turned off by itself, and it can be judged whether the electricity has been stolen according to the monitoring data.

An analog control switch (not shown) can be set between the electric energy dedicated metering chip 102 and the single chip microcomputer 104 to control whether the electric energy special metering chip 102 transmits the collected metering data to the single chip microcomputer 104 .

The single-chip microcomputer 104 and the communication module 110 are connected through the second serial peripheral device interface communication link, and the working mode of the communication module 110 is controlled by the single-chip microcomputer 104. When the electric meter is working normally, the single-chip microcomputer 104 makes the communication module 110 be in the position of receiving signals all the time. model.

When the main server sends a control command, the communication module 110 receives the command and transmits the command to the single-chip microcomputer 104, and the single-chip microcomputer 104 adjusts the working mode of the electrical equipment according to the received control information. At the same time, the single-chip microcomputer 104 also regularly sends the power consumption data to the server through the communication module 110 . The server counts the data transmitted by the meters in its jurisdiction and transmits it to the main server of the power company, realizing real-time monitoring of power consumption, which is beneficial for the power company to make some adjustments according to the actual situation. For example, when the power grid is overwhelmed during the peak period of electricity consumption, the main server of the power company sends a control command, which is forwarded to the communication module 110, and each meter automatically raises the temperature of the air conditioner used by each user by 2-3°C. This method is more reasonable than the previous method of large-scale power outages. The communication module 110 and the server can be connected through wired communication, such as RS485, RS232, etc., or can be connected through wireless communication, such as 433 module, WLAN, Bluetooth, etc.

At the same time, the single-chip microcomputer 104 also uploads the running state of the electric meter itself to the main server through the communication module 110, so that the main server can grasp the working conditions of each electric meter in real time.

The electric energy metering chip 102 of the meter is applied to home users when the current and voltage transformers for measuring single-phase circuits are used; it is applied to industrial users when the current and voltage transformers for measuring three-phase circuits are used.

Compared with the traditional electric meter, the electric meter of this application adopts a highly integrated circuit, so it is necessary to use system-in-package technology to assemble each module in the electric meter into a single standard package to form a complete, high-metering, A system of control and data transfer precision.

The electric meter is mainly composed of an electric energy metering chip 102, a single-chip microcomputer 104, and a communication module 110. The electric energy metering chip 102 and the single-chip microcomputer 104 can also be integrated into a system-on-chip 11, so that only two chips, the system-on-chip 11 and the communication module 110, are needed. . In addition, you can add peripherals such as audio to the meter, which will introduce more chips. The connection between the electric energy metering chip 102, the single-chip microcomputer 104, and the communication module 110 is all through the serial peripheral device interface communication connection, but the serial peripheral device interface communication connection is easily disturbed when transmitting signals, so the connection should be as far as possible Short, and the resistors connected in series or capacitors connected in parallel to each pin should be as close as possible to the signal input pin. For example, in the serial peripheral device interface communication connection between the electric energy metering chip 102 and the single-chip microcomputer 104, the resistors connected in series to the CS, SCLK, and DIN pins and the capacitors connected in parallel should be as close as possible to the electric energy metering chip 102 and the DOUT pin. The resistors connected in series and the capacitors connected in parallel should be as close as possible to the microcontroller 104 . The application of system-in-package technology can make the distance between chips closer and the total volume smaller, which can reduce the delay of signal transmission, improve electrical performance, and reduce the number of interconnection lines between chips and circuit boards, improving the reliability of the system sex.

Fig. 3 is the first embodiment of the packaging structure of the electric meter. On the substrate 31, the system-on-chip 11 and the communication module 110 are arranged side by side, and are connected to the substrate 31 through gold wires 302 and 304 respectively; On the substrate between the chips, thus effectively shortening the length of the serial peripheral device interface communication connection. When using three chips for electric energy metering chip 102, single-chip microcomputer 104, and communication module 110 to form an electric meter, the three chips are arranged side by side on the substrate 31, and the single-chip microcomputer 104 should be placed in the middle so as to connect with the other two chips. When more peripheral chips are used, multiple chips are arranged side by side on the substrate 31 , and the connected chips are placed adjacent to each other as much as possible.

Fig. 4 is a second embodiment of the packaging structure of the electric meter. On a substrate 31, the system-on-chip 11 and the communication module 110 are stacked on each other. Considering that the chip size of the system-on-chip 11 is larger than the chip size of the communication module 110, the communication module 110 is placed on the chip of the system-on-chip 11. The gold wires 304 and the gold wires 302 are connected to the substrate 31 . In this embodiment, while reducing the package size of the system, the length of the communication line of the serial peripheral device interface is effectively shortened. When adopting three chips of electric energy metering chip 102, single-chip microcomputer 104, and communication module 110 to form an electric meter, the three chips are sequentially stacked on the substrate 31, and any two chips can also be stacked together, and the third chip and them Arranged side by side. When designing, the single-chip microcomputer 104 should be arranged on a position convenient for connecting with other chips as much as possible. When using more peripheral chips, the stacking form should be specifically designed according to the connection between the chips and the size of the chips.

Fig. 5 is a third embodiment of the package structure of the electric meter. The SoC 11 and the communication module 110 are bonded to the front and back sides of the substrate 31 respectively, and connected to the substrate through gold wires 302 and gold wires 304 respectively. When using three chips for electric energy metering chip 102, single-chip microcomputer 104, and communication module 110 to form an electric meter, any two chips can be stacked on one side of the substrate 31, and the other chip can be placed on the other side of the substrate 31. According to the interface The position of each chip is specifically designed according to the situation. When using more peripheral chips, according to the connection between chips and chip size, specifically design the stacking form.

The main difference between the fourth embodiment of the ammeter package structure and the third embodiment is that holes are designed on the substrate, combined with flip-chip welding technology, the chip is placed face down, and tin-lead balls are deposited on the front pad of the chip to bond with the substrate. 31 ways of engaging. In addition to increasing the pin density of the chip, this embodiment can reduce the signal interference, improve the heat dissipation capability, and reduce the packaging volume because the length of the interconnection is greatly shortened.

The above-mentioned electric meter has a unified design of the electric energy metering chip 102, the single-chip microcomputer 104, and the communication module 110. In addition to the electric energy parameter measurement, remote meter reading and anti-theft functions of the previous electric meter, it also has the function of monitoring the operating status of the electric equipment and the electric meter itself. And it can interact with the upper-level control center 112 through the communication module 110, and receive its instructions to control the power consumption mode of the power consumption equipment, so as to reduce the burden on the power grid during the peak period of power consumption. Due to the adoption of the single-chip microcomputer 104 with programmable functions, it can be applied to different working conditions and enhance the versatility of the meter.

The above meter adopts a system-level packaging structure, and assembles each circuit module in the meter into a single standard package to form a complete system with high measurement, control and data transmission accuracy. The volume of the electric meter is reduced, and the reliability is enhanced.

The above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (18)

1. An electric meter, characterized in that: it includes a special metering chip for electric energy, a single-chip microcomputer, a display device, and a communication module; the special metering chip for electric energy is used to sample the current and voltage of the electric equipment, and obtain the corresponding metering data of electric energy parameters The single-chip microcomputer is used to receive measurement data, store it in the built-in memory of the single-chip computer, analyze, judge and make control, and simultaneously convert the measurement data into power consumption data and output it to the display device for display, and transmit the power consumption data to the communication module; the communication module transmits the power consumption data to the main server of the power company, receives the control command sent by the main server and transmits it to the single-chip microcomputer, and the single-chip microcomputer adjusts the operation mode of the electric equipment. 2. The electric meter according to claim 1, characterized in that: the single-chip microcomputer receives metering data through the communication connection of the first serial peripheral device interface, and the power consumption data is connected through the communication connection of the second serial peripheral device interface. The first serial peripheral device interface communication connection and the second serial peripheral device interface communication connection both include a chip select line CS, a clock line SCLK, a data input line DIN, and a data output line DOUT. 3. The electric meter according to claim 1, characterized in that: said electric energy dedicated metering chip comprises the following pins: RESET, reset the special metering chip for electric energy; SIG, when the special metering chip for electric energy is powered on and reset or restarted due to abnormal reasons, SIG becomes low level, and when the single-chip microcomputer writes the meter calibration data through the communication connection of the first serial peripheral device interface, SIG will Immediately become high level; SEL, the choice of three-phase three-wire and three-phase four-wire; OSCI, the input terminal of the system crystal oscillator, or the external irrigation system clock input; OSCO, the output terminal of the system crystal oscillator; REFOUT, reference voltage output, used as a DC bias for external signals; REFCAP, output 2.4V reference voltage; GND, the ground pin of the digital circuit of the dedicated metering chip for electric energy; AGND, the ground pin of the analog circuit of the dedicated metering chip for electric energy; VDD, the core power supply of the dedicated metering chip for electric energy, with a rated working voltage of 3V; AVCC, analog circuit power supply, rated working voltage 5V; VCC, digital circuit power supply, rated working voltage 5V; CS, serial peripheral device interface chip select signal, active low; SCLK, serial peripheral device interface clock input; DIN, serial peripheral device interface data input; DOUT, serial peripheral device interface data output; Revp, when the active power of any phase is detected to be negative, the output is high; when the active power of each phase is detected to be positive, the output is reset to low; CF1, active energy pulse output, its frequency reflects the magnitude of active power; CF2, active energy pulse output, its frequency reflects the magnitude of reactive power. 4. The electric meter according to claim 3, characterized in that: the dedicated metering chip for electric energy comprises an analog-to-digital conversion module, a reference voltage generation circuit, a digital signal processor, a pulse generator, and a voltage monitoring circuit; the analog-to-digital conversion The module is used to convert the collected electric energy parameters from analog signals to digital signals; the reference voltage generation circuit is used to generate reference voltage; the digital signal processor is used to measure the electric energy parameters; the pulse generator generates active electric energy Pulse output and reactive energy pulse output are used to calibrate the meter after the active energy pulse output or reactive energy pulse output is connected to the standard electric energy meter; the voltage monitoring circuit controls the voltage VCC of the digital circuit power supply, analog The voltage AVCC of the circuit power supply and the voltage VDD of the core power supply are monitored, and when any one of the voltages deviates from the rated voltage value by 5%, the special metering chip for electric energy will be reset. 5. The electric meter according to claim 3, characterized in that: the single-chip microcomputer monitors the working state of the special metering chip for electric energy through the SIG pin, and the single-chip microcomputer is also connected to the RESET pin of the special metering chip for electric energy to control the special metering chip for electric energy. The reset of the metering chip is to ensure the synchronous work of the single-chip microcomputer and the special metering chip for electric energy. 6. The electric meter according to claim 1, characterized in that: an analog control switch is provided between the dedicated metering chip for electric energy and the single-chip microcomputer for controlling whether the special metering chip for electric energy transmits metering data to the single-chip microcomputer. 7. The electricity meter according to claim 1, wherein the single chip microcomputer is also used to control the working mode of the communication module. 8. The electricity meter according to claim 1, wherein the single-chip microcomputer is also used to regularly upload the running state of the electricity meter itself to the main server through the communication module. 9. The electric meter according to claim 1, characterized in that: the dedicated metering chip for electric energy is a current and voltage transformer for measuring a single-phase circuit or a current and voltage transformer for measuring a three-phase circuit. 10. The electric meter according to claim 1, characterized in that: said electric energy metering chip, single-chip microcomputer, and communication module adopt a system-in-package structure, and said system-in-package structure includes a substrate and a plurality of gold wires. 11. The electric meter according to claim 10, characterized in that: said single-chip microcomputer and electric energy metering chip are integrated into a system-on-chip structure. 12. The electric meter according to claim 10, characterized in that: the system-in-package structure is to arrange three chips of electric energy metering chip, single-chip microcomputer and communication module side by side on the substrate, and the single-chip microcomputer is placed between the other two chips, and are respectively connected to the substrate through the gold wires. 13 . The electric meter according to claim 11 , wherein the system-in-package structure is that the system-on-chip and the communication module are arranged side by side on the substrate, and are respectively connected to the substrate by gold wires. 14. The electric meter according to claim 10, characterized in that: said system-in-package structure is to stack three chips, namely the electric energy metering chip, single-chip microcomputer, and communication module, on the substrate in sequence, or stack any two chips on the On the substrate, the third chip and the two chips are arranged side by side on the substrate, and are respectively connected to the substrate through the gold wires. 15. The electricity meter according to claim 11, characterized in that: the system-in-package structure is that the system-on-chip is arranged on the substrate, the communication module is stacked on the system-on-chip, and are respectively connected to the substrate through gold wires . 16. The electric meter according to claim 10, characterized in that: the system-in-package structure is to stack any two chips among the three chips of the electric energy metering chip, the single-chip microcomputer, and the communication module on one side of the substrate, and the third The block chips are arranged on the other side of the substrate, and are respectively connected to the substrate by gold wires. 17 . The electric meter according to claim 11 , wherein the system-in-package structure is that the system-on-chip and the communication module are respectively bonded to the front and back sides of the substrate, and are respectively connected to the substrate through gold wires. 18. The electric meter according to claim 16 or 17, characterized in that: the system-in-package structure is provided with openings on the substrate, combined with flip-chip welding technology, the chip is face down, and the chip is soldered on the front side of the chip. The bonding method of depositing tin-lead balls on the pad.

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