CN206773040U - A kind of intelligent electric energy meter - Google Patents

Abstract

The utility model discloses a kind of intelligent electric energy meter, the electric energy meter includes microprocessor, and the electric energy meter also includes power supply abnormality detection circuit, liquid crystal display circuit, RS485 telecommunication circuits, carrier communication circuit, data storage circuitry, power circuit, ic for energy metering, infrared communication circuit, control relay circuit, buzzer circuit, the keystroke interface circuit being connected respectively with the microprocessor；The ic for energy metering includes voltage sampling circuit and current sampling circuit.The utility model has outstanding advantages of multiple functional, reasonable in design, compact-sized, integrated level is high, so as to significantly reduce artificial input, can be widely used in operation of power networks and industrial automation management.

Description

A smart energy meter

technical field

The utility model relates to the technical field of electronic instruments, more specifically, the utility model relates to an intelligent electric energy meter.

Background technique

The existing electric energy meter has a single function. When the power supply company collects electricity, it must go to each household to check the electric meter. This traditional method greatly wastes human resources; Power outage; after the user pays the electricity bill, he must manually go to the user's site to perform the power transmission operation. In other words, the traditional electric energy meter must rely on a large amount of manpower to complete the functions of obtaining the metering results and billing of the electric energy meter, and the reliability of the traditional electric energy meter itself is difficult to guarantee.

Therefore, how to enrich the functions of the electric energy meter, improve the intelligence level of the electric energy meter, and reduce the labor input cost of the power supply company has become a technical problem to be solved urgently and the focus of research by those skilled in the art.

Utility model content

In order to solve the technical problems of the existing electric energy meter such as single function, low intelligence level, and high labor input cost, the utility model provides an intelligent electric energy meter. The energy meter has outstanding advantages such as high level of intelligence and rich functions, which greatly reduces the labor cost.

The utility model discloses an intelligent electric energy meter, which includes a microprocessor, and the electric energy meter also includes a power supply abnormality detection circuit, a liquid crystal display circuit, an RS485 communication circuit, a carrier communication circuit, A data storage circuit, a power supply circuit, an electric energy metering circuit, an infrared communication circuit, a relay control circuit, a buzzer circuit, and a button interface circuit; the electric energy metering circuit includes a voltage sampling circuit and a current sampling circuit.

Compared with the traditional electric energy meter, the smart electric energy meter of the utility model is used for power grid operation management, and has various functions such as electric energy collection, infrared communication, RS485 communication, carrier communication, data storage, abnormality detection, etc. The utility model also improves the reliability of the electric energy meter itself.

Further, the microprocessor includes a single-chip microcomputer modeled as FM3318C, and the single-chip microcomputer has 80 pins, and the Xin pin and the Xout pin of the single-chip microcomputer are respectively connected to two ends of a crystal oscillator.

Further, the electric energy metering circuit includes a metering chip of the model RN8209C, the RX pin of the metering chip is connected in series with a photocoupler set in reverse and then connected to the TXD3/SEG5/exINT4/IO13 pin of the single-chip microcomputer, so The TX pin of the metering chip is connected to the RXD3/SEG4/exINT3/IO12 pin of the single-chip microcomputer in series with a positive photocoupler; the V3P pin of the metering chip is connected to the voltage acquisition circuit, and the current The sampling circuit includes a first current sampling circuit and a second current sampling circuit, the V1P and V1N pins of the metering chip are connected to the first current sampling circuit, and the V2P and V2N pins of the metering chip are connected to the second current sampling circuit; The OSCO pin of the metering chip is connected to an external crystal oscillator circuit.

The utility model completes functions such as electric energy collection, measurement, electric energy signal conversion and processing through the above-mentioned metering chip and single-chip microcomputer.

Further, the liquid crystal display circuit includes an LCD light with 29 pins, and the 29 pins of the LCD light are respectively connected to the EXOUT2/SEG16/P30/IO30 pins and SEG17/P31/IO31 pins of the single-chip microcomputer. , TM1/SEG18/P32/IO32 pins, TIMER0/SEG22/IO43 pins, TIMER1/SEG23/IO44 pins, AN2/TIMER0gate/SEG25/IO47 pins, AN/3TIMER1gate/SEG26/IO50 pins, SVS0/AN4 /SEG27/IO51 pins, SVS1/AN5/SEG28/IO52 pins, AN6/SEG29/IO53 pins, AN7/SEG30/IO54 pins, AN8/SEG31/IO55 pins, AN10/SEG33/IO57 pins, AN11 /SEG40/IO90 pins, SEG35/P27/IO87 pins, SEG34/P26/IO86 pins, FOUT/SEG37/IO71 pins, SEG3/INT1/IO11 pins, SEG6/exINT5/IO72 pins, SEG7/exINT6 /IO73 pin, PCACOMP1/SEG11/P13/IO23 pin, EXIN4/SEG12/P14/IO24 pin, EXIN3/SEG13/P15/IO25 pin, COM0/IO00 pin, COM1/IO01 pin, COM2/IO02 Pin, COM3/IO03 pin, COM4/SEG38/IO04 pin, CO5/SEG39/IO05 pin connection.

Based on the above connection method, an information exchange channel is established between the liquid crystal display circuit and the microprocessor to display data such as electrical measurement results, and a large-screen LCD can be independently designed on the basis of this scheme, so as to achieve a wide visual range and rich For the purpose of displaying content, etc.

Further, the data storage circuit includes a memory model of FM24C512, the SCL pin of the memory is connected to the SCL/P06/IO16 pin of the single-chip microcomputer, and the SDA pin of the memory is connected to the SDA/P07 of the single-chip microcomputer /IO17 pin.

Through the above-mentioned memory, the utility model can store the result data and intermediate data, which is convenient for users or power companies to obtain and call in real time or later.

Further, the RS485 communication circuit includes a communication chip of the model ECH485NE, the RE pin of the communication chip is connected to the DE pin, and the RE pin of the communication chip is connected in series with a photocoupler arranged in reverse and then connected to the The TDI/RXD1/IO62 pin of the single-chip microcomputer, the RO pin of the communication chip is connected to the RXD1/SEG0/IO06 pin of the single-chip microcomputer in series with a positive photocoupler, and the DI pin of the communication chip A photocoupler set in reverse is connected in series to the TXD1/SEG1/IO07 pin of the single-chip microcomputer.

Further, the power supply circuit includes a step-down circuit, a rectifier circuit, a filter circuit and a voltage stabilizing circuit connected in series in sequence, the step-down circuit is connected to a 220V AC power supply, and the voltage stabilizing circuit is connected to a microprocessor; the power supply The abnormal detection circuit includes a photocoupler, one end of the photocoupler is connected to the zero line of the 220V AC power supply, and the other end is connected to the common end of two parallel resistors, and the two parallel resistors are connected to the OSCIN/IO60 tube of the single chip microcomputer respectively. The pin is connected to OSCOUT/IO61.

The utility model realizes the power supply to the single chip microcomputer and even the whole circuit through the power supply circuit, so that the whole intelligent electric energy meter circuit can work normally.

Further, the infrared communication circuit includes an infrared receiver model HM238R and a triode model MMBT5401, the ROUT pin of the infrared receiver is connected to the RXD0/P04/IO14 pin of the single-chip microcomputer, and the base of the triode A resistor is connected in series with the TXD0/P0/IO15 pin of the single-chip microcomputer.

Further, the carrier communication circuit includes a carrier chip of the model TCC082C, the TXD pin of the carrier chip is connected to the RXD2/P36/IO36 pin of the single-chip microcomputer after a resistor is connected in series, and the RXD pin of the carrier chip is connected in series After connecting a resistor to the TXD2/P37/IO37 pin of the single-chip microcomputer, the EVENTOUT pin of the carrier chip is connected in series with a resistor to the PCACOMP4/SEG21/P35/IO35 pin of the single-chip microcomputer, and the RST tube of the carrier chip The pin is connected to the PCACOMP3/SEG20/P34/IO34 pin of the single-chip microcomputer after a resistor is connected in series.

Based on the above single-chip microcomputer and the chip with communication function, the smart energy meter involved in the utility model has multiple two-way data communication functions including carrier communication, infrared communication, and RS485 communication. Through the two-way information exchange channel established with the microprocessor, Complete the transmission function of the meter data information.

Further, the button interface circuit includes a first button and a second button, one end of the first button is grounded, the other end is connected to the ANO/I45 pin of the single-chip microcomputer after being connected in series with a resistor, and the second button is connected in series with a resistor Then connect the AN1/SEG24/IO46 pins of the single-chip microcomputer; complete the key display and parameter setting functions through the key interface circuit. The buzzer circuit includes a triode and a buzzer, the collector of the triode is connected to the buzzer, the base is connected to the PCACOMP2/SEG19/P33/IO33 pin of the single-chip microcomputer after a resistor is connected in series, and the buzzer The device realizes the reminder of the working state of the electric energy meter; the relay control circuit includes a relay driver chip with a model number of AL868, and the A pin of the relay driver chip is connected in series with a resistor to the VDISP1/P21/IO81 pin of the single-chip microcomputer, The B pin of the relay driver chip is connected in series with a resistor to the VDISP0/P20/IO80 pin of the single-chip microcomputer. The utility model achieves the purposes of automatic adjustment, safety protection, conversion circuit and the like through the relay control circuit.

The beneficial effects of the utility model are: the utility model has outstanding advantages such as complete functions, reasonable design, compact structure, high integration, high precision, low power consumption, stable performance, etc., thereby greatly reducing labor input, and can be widely used in power grid operation and industrial automation management.

Description of drawings

Figure 1 is a schematic diagram of the working principle of the smart electric energy meter.

Figure 2 is a schematic diagram of the structure of the microprocessor.

Figure 3 is a schematic diagram of the electric energy metering circuit structure.

FIG. 4 is a schematic structural diagram of a liquid crystal display circuit.

FIG. 5 is a schematic structural diagram of a data storage circuit.

Figure 6 is a schematic diagram of the structure of the RS485 communication circuit.

Fig. 7 is a schematic diagram of the structure of the power supply circuit.

FIG. 8 is a schematic structural diagram of a power supply abnormality detection circuit.

FIG. 9 is a schematic structural diagram of an infrared communication circuit.

Fig. 10 is a schematic structural diagram of a carrier communication circuit.

Fig. 11 is a schematic structural diagram of the button interface circuit.

Figure 12 is a schematic structural diagram of the buzzer circuit.

Fig. 13 is a schematic diagram of the structure of the relay control circuit.

In the figure,

1. Abnormal power supply detection circuit; 2. Liquid crystal display circuit; 3. RS485 communication circuit; 4. Carrier communication circuit; 5. Microprocessor; 6. Data storage circuit; 7. Power supply circuit; 8. Electric energy metering circuit; 9. Infrared communication circuit; 10. Relay control circuit; 11. Buzzer circuit; 12. Button interface circuit.

detailed description

Below in conjunction with accompanying drawing, the structure of the present utility model is explained and illustrated in detail.

As shown in Figure 1-13, the utility model discloses a smart electric energy meter, which includes a microprocessor 5, and the electric energy meter also includes a power supply anomaly detection circuit 1 and a liquid crystal display circuit respectively connected to the microprocessor 5 2. RS485 communication circuit 3, carrier communication circuit 4, data storage circuit 6, power supply circuit 7, electric energy metering circuit 8, infrared communication circuit 9, relay control circuit 10, buzzer circuit 11, key interface circuit 12; The metering circuit 8 includes a voltage sampling circuit and a current sampling circuit. Not only that, in terms of product structure of electric energy meters, current electric energy meters usually use lithium batteries. After the lithium batteries have been running for a period of time, some of the internal power of the lithium batteries will be exhausted, resulting in an error in the clock of the electric meter, which will affect the power balance. The utility model separately designs an external battery box, the battery box is set in the battery compartment of the intelligent electric energy meter housing, and the lithium battery is installed in the external battery box, when the lithium battery power is exhausted, open the transparent cover of the electric energy meter , you can see the battery box, pull out the battery box, rotate the battery box cover and remove the lithium battery, then replace the lithium battery, rotate the battery box cover, complete the installation of the lithium battery, and then push the battery box into the battery compartment , close the transparent cover of the energy meter to complete the replacement of the lithium battery. Therefore, the utility model can open the cover plate of the electric energy meter and replace the battery without dismantling the electric energy meter, which saves the time for replacing the electric energy meter on site.

As shown in Figure 1-2, the microprocessor 5 includes a single-chip microcomputer model FM3318C, which is highly integrated, rich in resources, and has 80 pins. The chip has a 16-bit enhanced 80251 processor core and a 128KB program memory. , 5KBRAM, and the internal integrated LCD driver, RTC real-time clock, ADC and UART, I ² C, SPI, 7816 and other general peripheral interfaces of the chip, in this embodiment, the Xin pin and the Xout pin of the single-chip microcomputer are respectively connected to a The two ends of the crystal oscillator X1 provide the working clock for the microcontroller. The single chip microcomputer is connected to the voltage sampling circuit and the current sampling circuit through the UART communication interface, and is connected to the data storage circuit 6 through the I ² C interface.

As shown in Figure 1-3, the electric energy metering circuit 8 includes a metering chip with a model number of RN8209C, which is a special metering chip for high-precision single-phase electric energy, capable of measuring active power, reactive power, active energy, and reactive power. , and can provide two independent active power, effective value, voltage effective value, line frequency, zero-crossing interruption and other calculation functions at the same time, so as to realize the single-phase cost control function of the utility model. In this embodiment, as shown in Figure 3 As shown, the current sampling circuit is mainly composed of manganin shunts, capacitors and resistors; the voltage sampling circuit is composed of a resistor divider network and a filter circuit; the utility model firstly performs high-precision sampling and amplification of voltage signals and current signals, Then the sampling signal output of current and voltage enters the metering processing circuit for processing to obtain the required digital signal, sends the digital signal to the microprocessor 5, and performs electric energy accumulation processing through the microprocessor 5 to obtain the required electrical measurement value, thereby completing the data functions such as reading and data display. More specifically, the RX pin of the metering chip is connected to the TXD3/SEG5/exINT4/IO13 pin of the microcontroller in series with a photocoupler U17 set in reverse, and the TX pin of the metering chip is connected in series with a photocoupler set in the forward direction U23 is connected to the RXD3/SEG4/exINT3/IO12 pin of the microcontroller; the V3P pin of the metering chip is connected to the voltage acquisition circuit, the current sampling circuit includes the first current sampling circuit and the second current sampling circuit, and the V1P and V1N pins of the metering chip Connect the first current sampling circuit, the V2P and V2N pins of the metering chip are connected to the second current sampling circuit; the OSCO pin of the metering chip is connected to the external crystal oscillator circuit, and the external crystal oscillator circuit provides the working clock for the metering chip.

As shown in Figures 1-4, the liquid crystal display circuit 2 includes an LCD lamp with 29 pins, and the model of the LCD lamp is DKE1326. More specifically, the 29 pins of the LCD lamp in this embodiment are respectively connected to the microcontroller EXOUT2/SEG16/P30/IO30 pins, SEG17/P31/IO31 pins, TM1/SEG18/P32/IO32 pins, TIMER0/SEG22/IO43 pins, TIMER1/SEG23/IO44 pins, AN2/TIMER0gate/SEG25 /IO47 pin, AN/3TIMER1gate/SEG26/IO50 pin, SVS0/AN4/SEG27/IO51 pin, SVS1/AN5/SEG28/IO52 pin, AN6/SEG29/IO53 pin, AN7/SEG30/IO54 pin , AN8/SEG31/IO55 pins, AN10/SEG33/IO57 (BUF4TST) pins, AN11/SEG40/IO90 pins, SEG35/P27/IO87 pins, SEG34/P26/IO86 pins, FOUT/SEG37/IO71 tubes pin, SEG3/INT1/IO11 pin, SEG6/exINT5/IO72 pin, SEG7/exINT6/IO73 pin, PCACOMP1/SEG11/P13/IO23 pin, EXIN4/SEG12/P14/IO24 pin, EXIN3/SEG13/ P15/IO25 pins, COM0/IO00 pins, COM1/IO01 pins, COM2/IO02 pins, COM3/IO03 pins, COM4/SEG38/IO04 pins, CO5/SEG39/IO05 pins are connected, so as to realize through The LCD light shows the purpose of the data.

As shown in Figure 1-5, the data storage circuit 6 includes a memory of the type FM24C512, the SCL pin of the memory is connected to the SCL/P06/IO16 pin of the microcontroller, and the SCL pin is connected to the VDDPI pin of the microcontroller in series with a resistor R36. The SDA pin of the SDA pin is connected to the SDA/P07/IO17 pin of the single-chip microcomputer, and the SDA pin is connected to the VDDPI pin of the single-chip microcomputer in series with a resistor R35. The VCC pin of the memory is directly connected to the VDDPI pin of the single-chip microcomputer, and the VSS pin of the memory Pin, A1 pin, A2 pin, WP pin are connected to the power supply. The utility model uses the data storage circuit 6 to store data such as power accumulation generated after processing by the single-chip microcomputer.

As shown in Figure 1-6, the RS485 communication circuit 3 includes a communication chip of the model ECH485NE, the RE pin of the communication chip is connected to the DE pin, and the RE pin of the communication chip is connected in series with a reversely set photocoupler D12. The TDI/RXD1/IO62 pin of the single-chip microcomputer, the RO pin of the communication chip is connected in series with a photocoupler D14 set in the forward direction, and then connected to the RXD1/SEG0/IO06 pin of the single-chip microcomputer, and the DI pin of the communication chip is connected in series with a reversely set photocoupler The photocoupler D13 is connected to the TXD1/SEG1/IO07 pin of the microcontroller. A two-way information exchange channel is established between the RS485 communication circuit 3 and the single-chip computer, and the single-chip computer performs data exchange with the RS485 communication circuit 3 through the UART serial bus, and sends the data to the master station through the RS485 communication circuit 3 .

As shown in Figures 1-8, specifically, as shown in Figures 2 and 7, the power supply circuit 7 includes a step-down circuit, a rectifier circuit, a filter circuit and a voltage stabilizing circuit connected in series in sequence, and the step-down circuit includes a transformer for step-down , the step-down circuit is connected with the 220V AC power supply, the obtained power supply is rectified, filtered, and stabilized, and the voltage stabilized circuit is connected with the microprocessor 5, so as to realize the power supply for each power interface of the entire circuit; as shown in Figure 2 and 8 The abnormal power supply detection circuit 1 includes a photocoupler, one end of the photocoupler is connected to the zero line of the 220V AC power supply, the other end is connected to the common end of two parallel resistors R99 and R100, and the two parallel resistors are respectively connected to the OSCIN/ The IO60 pin is connected to OSCOUT/IO61.

As shown in Figure 1-9, the infrared communication circuit 9 includes an infrared receiver of the model HM238R and a triode of the model MMBT5401. The ROUT pin of the infrared receiver is connected to the RXD0/P04/IO14 pin of the microcontroller, and the bases of the triode are connected in series. A resistor R78 is connected to the TXD0/P0/IO15 pin of the microcontroller. An information exchange channel is established between the infrared communication circuit 9 and the microprocessor 5, so that reading and querying of the electric energy meter information can be realized through the handheld palm computer.

As shown in Figure 1-10, the carrier communication circuit 4 includes a carrier chip of the model TCC082C. The TXD pin of the carrier chip is connected in series with a resistor R12 and then connected to the RXD2/P36/IO36 pin of the microcontroller. The RXD pin of the carrier chip is connected in series. Resistor R29 is connected to the TXD2/P37/IO37 pin of the microcontroller, the EVENTOUT pin of the carrier chip is connected in series with a resistor R31 and connected to the PCACOMP4/SEG21/P35/IO35 pin of the microcontroller, and the RST pin of the carrier chip is connected in series with a resistor R30 PCACOMP3/SEG20/P34/IO34 pins of the microcontroller. Through the establishment of an information exchange channel between the carrier communication circuit 4 and the microprocessor 5, reading and querying information of the smart energy meter can be realized through low-voltage power carrier communication.

As shown in Figure 1-13, the button interface circuit 12 includes a first button and a second button. One end of the first button is grounded, and the other end is connected in series with a resistor R25 to the AN0/I45 pin of the microcontroller. The second button is connected in series with a resistor R26. Then connect the AN1/SEG24/IO46 pins of the single-chip microcomputer to realize the setting of various parameters of the entire circuit; the buzzer circuit 11 includes a triode Q2 and a buzzer BELL, the collector of the triode is connected to the buzzer, and the base is connected in series A resistor R27 is connected to the PCACOMP2/SEG19/P33/IO33 pin of the single-chip microcomputer; the relay control circuit 10 includes a relay driver chip of model AL868, and the A pin of the relay driver chip is connected in series with a resistor to the VDISP1/P21/IO81 tube of the single-chip microcomputer pin, the B pin of the relay driver chip is connected to the VDISP0/P20/IO80 pin of the microcontroller after connecting a resistor in series.

Based on the above-mentioned chips and their connection relationship, the utility model has time-sharing and multi-rate accurate metering combined active power function, forward and reverse active power energy, and also has various electric power functions such as timing freezing, instantaneous freezing, agreed freezing, daily freezing, etc. The function of data freezing and recording also has various event recording functions such as programming, clearing, time adjustment, power failure, opening and closing, and opening the cover. The utility model can monitor multiple dynamic parameters such as voltage, current, apparent power and power factor in real time; it can respond to external effective communication commands through infrared, RS485, power carrier and other communication methods to complete the reading of the data of the electric energy meter. When the user's remaining electricity fee is insufficient, based on various communication methods, the utility model can issue an alarm command through the main station to prompt the user to purchase electricity. Electric operation. When the user is a key user, it is not advisable to implement a power cut, and a power guarantee order can be issued, and the user can continue to use electricity even if the user is in arrears.

In the present utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and simple improvements made on the essential content of the present utility model should be included in the scope of the present utility model. within the scope of protection.

Claims (10)

1. a kind of intelligent electric energy meter, the electric energy meter includes microprocessor (5), it is characterised in that：The electric energy meter also include respectively with The power supply abnormality detection circuit (1) of microprocessor (5) connection, liquid crystal display circuit (2), RS485 telecommunication circuits (3), load Wave communication circuit (4), data storage circuitry (6), power circuit (7), ic for energy metering (8), infrared communication circuit (9), after Electrical apparatus control circuit (10), buzzer circuit (11), keystroke interface circuit (12)；The ic for energy metering (8) includes voltage Sample circuit and current sampling circuit.

2. intelligent electric energy meter according to claim 1, it is characterised in that：The microprocessor (5) includes model FM3318C single-chip microcomputer, the single-chip microcomputer have 80 pins, and the Xin pins and Xout pins of the single-chip microcomputer connect respectively The both ends of one crystal oscillator.

3. intelligent electric energy meter according to claim 2, it is characterised in that：The ic for energy metering (8) includes model RN8209C computation chip, the RX pins of the computation chip are connected after an oppositely arranged photoelectrical coupler described in connection The TXD3/SEG5/exINT4/IO13 pins of single-chip microcomputer, the positive photoelectricity set of TX pins series connection one of the computation chip The RXD3/SEG4/exINT3/IO12 pins of the single-chip microcomputer are connected after coupler；The V3P pins connection institute of the computation chip Voltage collection circuit is stated, the current sampling circuit includes the first current sampling circuit and the second current sampling circuit, the meter V1P, V1N pin for measuring chip connect the first current sampling circuit, and V2P, V2N pin of the computation chip connect the second electric current Sample circuit；The OSCO pins connection external crystal oscillation circuit of the computation chip.

4. intelligent electric energy meter according to claim 2, it is characterised in that：The liquid crystal display circuit (2) includes having 29 The LCD lamps of individual pin, 29 pins of the LCD lamps respectively the EXOUT2/SEG16/P30/IO30 pins with the single-chip microcomputer, SEG17/P31/IO31 pins, TM1/SEG18/P32/IO32 pins, TIMER0/SEG22/IO43 pins, TIMER1/SEG23/ IO44 pins, AN2/TIMER0gate/SEG25/IO47 pins, AN/3TIMER1gate/SEG26/IO50 pins, SVS0/ AN4/SEG27/IO51 pins, SVS1/AN5/SEG28/IO52 pins, AN6/SEG29/IO53 pins, AN7/SEG30/IO54 Pin, AN8/SEG31/IO55 pins, AN10/SEG33/IO57 pins, AN11/SEG40/IO90 pins, SEG35/P27/ IO87 pins, SEG34/P26/IO86 pins, FOUT/SEG37/IO71 pins, SEG3/INT1/IO11 pins, SEG6/ ExINT5/IO72 pins, SEG7/exINT6/IO73 pins, PCACOMP1/SEG11/P13/IO23 pins, EXIN4/SEG12/ P14/IO24 pins, EXIN3/SEG13/P15/IO25 pins, COM0/IO00 pins, COM1/IO01 pins, COM2/IO02 pipes Pin, COM3/IO03 pins, COM4/SEG38/IO04 pins, the connection of CO5/SEG39/IO05 pins.

5. intelligent electric energy meter according to claim 2, it is characterised in that：The data storage circuitry (6) includes model FM24C512 memory, the SCL pins of the memory connect the SCL/P06/IO16 pins of the single-chip microcomputer, the storage The SDA pins of device connect the SDA/P07/IO17 pins of the single-chip microcomputer.

6. intelligent electric energy meter according to claim 2, it is characterised in that：The RS485 telecommunication circuits (3) include model ECH485NE communication chip, the RE pins of the communication chip are connected with DE pins, the RE pins series connection of the communication chip The TDI/RXD1/IO62 pins of the single-chip microcomputer, the RO of the communication chip are connected after one oppositely arranged photoelectrical coupler The RXD1/SEG0/IO06 pins of the single-chip microcomputer, the communication are connected after the positive photoelectrical coupler set of pin series connection one The TXD1/SEG1/IO07 pins of the single-chip microcomputer are connected after DI pins one oppositely arranged photoelectrical coupler of series connection of chip.

7. intelligent electric energy meter according to claim 2, it is characterised in that：The power circuit (7) includes what is be sequentially connected in series Reduction voltage circuit, rectification circuit, filter circuit and mu balanced circuit, the reduction voltage circuit are connected with 220V AC powers, the voltage stabilizing Circuit is connected with microprocessor (5)；The power supply abnormality detection circuit (1) includes a photoelectrical coupler, the photoelectric coupling Device one end is connected with the zero line of 220V AC powers, the other end is connected with the common port of two parallel resistances, two parallel resistances It is connected respectively with the OSCIN/IO60 pins and OSCOUT/IO61 of the single-chip microcomputer.

8. intelligent electric energy meter according to claim 2, it is characterised in that：The infrared communication circuit (9) includes model HM238R infrared receiver and model MMBT5401 triode, the ROUT pins connection institute of the infrared receiver The RXD0/P04/IO14 pins of single-chip microcomputer are stated, the single-chip microcomputer is connected after one resistance of base series of the triode TXD0/P0/IO15 pins.

9. intelligent electric energy meter according to claim 2, it is characterised in that：The carrier communication circuit (4) includes model TCC082C carrier chip, the TXD pins of the carrier chip, which are connected, connects the RXD2/ of the single-chip microcomputer after a resistance P36/IO36 pins, the RXD pins of the carrier chip, which are connected, connects the TXD2/P37/IO37 of the single-chip microcomputer after a resistance Pin, the EVENTOUT pins of the carrier chip, which are connected, connects the PCACOMP4/SEG21/ of the single-chip microcomputer after a resistance P35/IO35 pins, the RST pins of the carrier chip, which are connected, connects the PCACOMP3/ of the single-chip microcomputer after a resistance SEG20/P34/IO34 pins.

10. intelligent electric energy meter according to claim 2, it is characterised in that：The keystroke interface circuit (12) includes first Button and the second button, described first button one end is grounded, the AN0/ of the single-chip microcomputer is connected after the other end one resistance of series connection I45 pins, second button, which is connected, connects the AN1/SEG24/IO46 pins of the single-chip microcomputer after a resistance；The buzzing Device circuit (11) includes a triode and a buzzer, colelctor electrode connection buzzer, the base series one of the triode The PCACOMP2/SEG19/P33/IO33 pins of the single-chip microcomputer are connected after individual resistance；Control relay circuit (10) bag Include model AL868 relay driving chip, the A pins of the relay driving chip are connected after a resistance described in connection The VDISP1/P21/IO81 pins of single-chip microcomputer, the B pins of the relay driving chip are connected and connect the list after a resistance The VDISP0/P20/IO80 pins of piece machine.