CN216696459U - Single-phase local cost control intelligent electric energy meter - Google Patents

Abstract

The utility model discloses a single-phase local cost control intelligent electric energy meter, which comprises a collecting unit and a processing unit, wherein the collecting unit comprises a current sampling circuit, a voltage sampling circuit, a metering processing connecting circuit and a metering processing chip; the processing unit comprises a processor and a remote connection module, a metering processing chip is electrically connected with the processor, prestored user information is called through the processor, the user information can be sent to a central station through the remote connection module, the user information is reported in time, the central station can send personnel in time to carry out on-site detection, electricity stealing behavior is found and prevented in time, potential safety hazards in the field are eliminated, and loss of electricity stealing to a power grid company is avoided.

Description

Single-phase local cost control intelligent electric energy meter

Technical Field

The utility model relates to the technical field of electronic instruments and meters, in particular to a single-phase local cost control intelligent electric energy meter.

Background

The charge control electric energy meter is one of the intelligent electric energy meters coming out from national power grids in recent years, the charge control electric energy meter is divided into three items, a single item, three items and more according to the types of users, the charge control electric energy meter is one of the intelligent electric energy meters of the national power grids, the charge control is that the charge rate electric energy meter and the common electric energy meter have the difference that the charge is carried out according to the time intervals in the charge control electric energy meter, 4 time intervals, namely, 24 hours in a day are divided into 4 time intervals, 24/4 is 6, each time interval has 6 hours, the charge control electric energy meter has a total electric quantity inside, namely the total power supply quantity of the electric energy meter, the sum of the electric quantities of the tip, the peak, the flat and the valley in 4 time periods is the total electric quantity, the charge control electric energy meter has an important function of inserting a card, when the card is defaulted, overdraft can be carried out, overdraft electric quantity is limited, and if the card is not charged, the electric energy meter can automatically trip.

However, in the actual using process, some units, especially some private enterprises or individual merchants, utilize the existing electricity stealing as a profit means, and in order to achieve the purpose of paying no electricity or less electricity, various measures are taken to steal electricity, but the existing charge control intelligent meter is difficult to identify the behavior, which can damage the charge control electric energy meter, and after the damage, the electric network company cannot know the behavior, unless the electric network company checks the electricity, the electric network company is difficult to find in time, a large amount of electric energy loss is caused to the electric network company, the electricity stealing usually needs live operation, and a great potential safety hazard exists, and the electricity stealing prevention work is always an important work of the electric power company.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the utility model of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the utility model.

Therefore, the technical problems to be solved by the utility model are as follows: the existing cost control intelligent meter is difficult to identify electricity stealing behaviors, damage can be caused to the cost control electric energy meter, a power grid company cannot know the damage, and a large amount of electric energy loss can be caused to the power grid company unless the power grid company is checked at home and cannot find the damage in time.

In order to solve the technical problems, the utility model provides the following technical scheme: the single-phase local cost control intelligent electric energy meter comprises a collecting unit and a processing unit, wherein the collecting unit comprises a current sampling circuit, a voltage sampling circuit, a metering processing connecting circuit and a metering processing chip, the current sampling circuit and the voltage sampling circuit are connected with a service phase line and a zero line, the current sampling circuit and the voltage sampling circuit are electrically connected with the metering processing connecting circuit, and the metering processing connecting circuit is electrically connected with the metering processing chip; the processing unit comprises a processor and a remote connection module, the metering processing chip is electrically connected with the processor, the processor is electrically connected with the remote connection module in a two-way mode, and the remote connection module is used for transmitting remote information to the metering processing chip.

As a preferred scheme of the single-phase local cost control intelligent electric energy meter, the method comprises the following steps: the remote connection module comprises a URT serial bus and an RS485 interface, the processor is connected with the RS485 interface through the URT serial bus, is connected with the master station through the RS485 interface, and sends information to the master station.

As a preferred scheme of the single-phase local cost control intelligent electric energy meter, the method comprises the following steps: the intelligent household appliance is characterized by further comprising a power supply unit, wherein the power supply unit comprises a transformer and a power circuit, the transformer is electrically connected with the home phase line and the zero line, the transformer is electrically connected with the power circuit, and the power circuit is respectively electrically connected with the metering processing connecting circuit, the metering processing chip, the processor and the remote connecting module.

As a preferred scheme of the single-phase local cost control intelligent electric energy meter, the method comprises the following steps: the power supply unit further comprises a battery and a battery switching circuit, the battery is electrically connected with the battery switching circuit, the battery switching circuit is electrically connected with the power circuit, and the battery switching circuit is electrically connected with the processor in a bidirectional mode.

As a preferred scheme of the single-phase local cost control intelligent electric energy meter, the method comprises the following steps: the processor is respectively connected with the EEPROM data memory and the FLSH data memory through an IC two-wire serial bus and an SPI four-wire serial bus.

As a preferred scheme of the single-phase local cost control intelligent electric energy meter, the method comprises the following steps: the processor is electrically connected with the carrier interface circuit, and the carrier interface circuit is electrically connected with the carrier communication module in a bidirectional mode.

As a preferred scheme of the single-phase local cost control intelligent electric energy meter, the method comprises the following steps: the processor is externally connected with a pin and is electrically connected with a key interface circuit in a bidirectional mode, and the key interface circuit is electrically connected with the control key in the bidirectional mode.

As a preferred scheme of the single-phase local cost control intelligent electric energy meter, the method comprises the following steps: still include CPU card interface and CPU card interface circuit, CPU card is pegged graft to the activity in the CPU card interface, and CPU card 6 passes through the external pin on the two-way electric connection treater of CPU card interface circuit 6.

As a preferred scheme of the single-phase local cost control intelligent electric energy meter, the method comprises the following steps: the processor is electrically connected with the infrared communication interface circuit in a bidirectional mode, and the infrared communication interface circuit is electrically connected with the infrared receiver and the infrared transmitter respectively.

As a preferred scheme of the single-phase local cost control intelligent electric energy meter, the method comprises the following steps: the processor is electrically connected with the liquid crystal display screen M.

The utility model has the beneficial effects that: according to the utility model, the pre-stored user information can be called through the processor, the user information can be sent to the master station through the remote connection module, the user information can be reported in time, the master station can dispatch personnel to carry out on-site detection in time, the electricity stealing behavior can be found and prevented in time, the potential safety hazard of on-site is eliminated, and the loss of the electricity stealing to a power grid company is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

fig. 1 is a schematic flow chart of an acquisition unit and a processing unit in the first embodiment.

FIG. 2 is a diagram illustrating the connection between a processor and a program connection module according to a second embodiment.

Fig. 3 is a schematic diagram of the connection of a power supply unit in the second embodiment.

Fig. 4 is a schematic diagram of the connection of the processor in the first and second embodiments.

Fig. 5 is a circuit diagram showing a connection of the liquid crystal display panel in the second embodiment.

Fig. 6 is a circuit diagram of an EEPROM data memory and a FLASH data memory in a second embodiment.

Fig. 7 is a circuit diagram of the acquisition unit in the first and second embodiments.

Fig. 8 is a circuit diagram of the remote connection module in the first and second embodiments.

Fig. 9 is a circuit diagram of a power supply circuit and a connection battery switching circuit in the second embodiment.

Fig. 10 is a circuit diagram of an infrared communication interface in the second and third embodiments.

Fig. 11 is a circuit diagram of a carrier interface in the second and third embodiments.

Fig. 12 is a circuit diagram of a key interface in the second and third embodiments.

Fig. 13 is a circuit diagram of an external pin of a processor in the second and third embodiments.

Fig. 14 is a circuit diagram of a CPU card interface in the second and third embodiments.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1, 2, 4 and 7, for a first embodiment of the present invention, the embodiment provides a single-phase local cost control intelligent electric energy meter, which includes an acquisition unit 100 and a processing unit 200, the acquisition unit 100 includes a current sampling circuit 101, a voltage sampling circuit 102, a metering processing connection circuit 103 and a metering processing chip 104, the current sampling circuit 101 and the voltage sampling circuit 102 are connected to a service phase line and a zero line, the current sampling circuit 101 and the voltage sampling circuit 102 are electrically connected to the metering processing connection circuit 103, and the metering processing connection circuit 103 is electrically connected to the metering processing chip 104. The current sampling circuit 101 mainly comprises a manganin shunt, a capacitor and a resistor; the voltage sampling circuit 102 is composed of a resistance voltage division network and a filter circuit; the current sampling circuit 101 and the voltage sampling circuit 102 can collect current and voltage information on a phase line and a zero line of a home, the collected information passes through the metering processing connecting circuit 103, the metering processing connecting circuit 103 can convert the collected current information and voltage information into digital signals through the digital-to-analog converter, the digital signals are input into the metering processing chip 104, the collected current and voltage information is analyzed through the metering processing chip 104, the metering processing chip 104 can select a Shenzhen Rui micro RN8209C chip, the RN82 8209C chip can measure active power, reactive power, active functional quantity and reactive energy, and can provide two independent paths of active power, effective value, voltage effective value, line frequency, zero-crossing interruption and the like, and a flexible electricity larceny prevention scheme can be realized.

The processing unit 200 includes a processor 201 and a remote connection module 202, the measurement processing chip 104 is electrically connected to the processor 201, the processor 201 is electrically connected to the remote connection module 202 in a bidirectional manner, and the remote connection module 202 provides remote information transmission for the measurement processing chip 104. The processor 201 adopts an FM33A048 microprocessor, the inside of the processor comprises an FM33A048 chip with limited Shanghai Compound Dan microelectronics group, the integration level is high, the resources are rich, the chip is provided with a 32-bit ARM Cortex-M0+ core processor, a 256KB program memory, a 32KBRAM, an internal integrated LCD driver, a high-precision temperature sensor, a low-power consumption analog comparator, an RTC real-time clock, an ADC and a UART, I2C, SPI, 7816 and other universal peripheral interfaces, pins on the processor 201 are connected with pins on the metering processing chip 104, the information of the metering processing chip 104 can be received, after the information of the electricity stealing behavior of the user is received, the processor 201 can call the pre-stored user information, the information of the user can be sent to a central station through the remote connection module 202, the information of the user can be reported in time, the central station can send personnel to detect on the spot in time, discover and prevent the electricity stealing behavior in time, the potential safety hazard of site sites is eliminated, and the loss of power grid companies caused by electricity stealing is avoided.

Example 2

Referring to fig. 2 to 14, a second embodiment of the present invention is based on the previous embodiment, in which the remote connection module 202 includes a UART serial bus 201a and an RS485 interface 201b, the processor 201 is connected to the RS485 interface 202b through the UART serial bus 202a, establishes a connection with the central station through the RS485 interface 201b, and sends information to the central station.

The intelligent metering device further comprises a power supply unit 300, wherein the power supply unit 300 comprises a transformer 301 and a power circuit 302, the transformer 301 is electrically connected with the phase line and the zero line of the home, the transformer 301 is electrically connected with the power circuit 302, and the power circuit 302 is respectively and electrically connected with the metering processing connecting circuit 103, the metering processing chip 104, the processor 201 and the remote connecting module 202. Through with transformer 301 electric connection house lead-in phase line and zero line, can insert the voltage of house lead-in phase line and zero line, provide voltage after reducing voltage through transformer 301, input power supply circuit 302 is for measurement processing connecting circuit 103, measurement processing chip 104, treater 201 and remote connection module 202.

The power supply unit 300 further includes a battery 303 and a battery switching circuit 304, the battery 303 is electrically connected to the battery switching circuit 304, the battery switching circuit 304 is electrically connected to the power circuit 302, and the battery switching circuit 304 is bidirectionally electrically connected to the processor 201. When the processor 201 has unstable power supply, the power can be fed back to the battery switching circuit 304, the power supply line is switched to the battery 303, the battery 303 is used for supplying power, and the existing storage battery can be used as the battery 303.

The FLASH memory device further comprises a data memory 203, the data memory 203 comprises an existing EEPROM data memory 203a and an existing FLASH data memory 203b, the processor 201 is respectively connected with the EEPROM data memory 203a and the FLASH data memory 203b through an I2C two-wire serial bus and an SPI four-wire serial bus, the number of times of storage of the EEPROM data memory 203a is 100 ten thousand, and the number of times of storage of the FLASH data memory 203b is 10 ten thousand.

The device also comprises a carrier interface circuit 204, the processor 201 is electrically connected with the carrier interface circuit 204, the carrier interface circuit 204 is electrically connected with a carrier communication module 204a in a bidirectional mode, a pin on the processor 201 is connected with a pin on the carrier communication module 204a, a power grid can be used for transmitting data signals through the existing carrier communication module 204a, and the device can adopt the existing l PL-701 as a single-phase power line communication modem.

The processor 201 is electrically connected to the key interface circuit 205 through an external pin, the key interface circuit 205 is electrically connected to the control key a through the key interface circuit 205, and the control key a can input a signal to the processor 201 through the key interface circuit 205 to complete a desired key setting function.

The CPU card interface 206 is electrically connected with an external pin on the processor 201 in a bidirectional way through the CPU card interface circuit 206a, an information exchange channel is established between the CPU card interface circuit 206a and the processor 201 in an electric connection way, and the information exchange can be carried out with the processor 201 in a way that the contact type CPU card is inserted into the CPU card interface 206, so that the contact type CPU card can be identified.

The processor 201 is bidirectionally electrically connected to the infrared communication interface circuit 207, and the infrared communication interface circuit 207 is electrically connected to the infrared receiver 207a and the infrared transmitter 207b, respectively. The infrared communication interface circuit 207 establishes an information exchange channel with the processor 201 in an electrical connection manner, can exchange information, sends and receives information through the infrared receiver 207a and the infrared emitter 207b, and establishes information connection with the infrared receiver 207a and the infrared emitter 207b through the existing handheld palm computer to read and query the information of the electric energy meter.

The processor 201 is electrically connected to the liquid crystal display panel M. The processor 201 of the liquid crystal display M establishes an information exchange channel in an electric connection mode, and the liquid crystal display M is used for displaying data such as electric measurement and the like, so that information reading is facilitated.

Example 3

Referring to fig. 10 to 14, a third embodiment of the present invention, which is based on the previous embodiment,

the working principle of the utility model is explained below: when the electric energy meter normally works, firstly, high-precision sampling and amplifying are carried out on voltage and current, analog signals are converted into digital signals through a metering chip, electric energy accumulation processing is carried out on obtained data according to preset parameters, the data are stored, and data output is carried out in response to external effective communication requirements; the electric energy metering processing chip generates electric energy data to be sent to the processor 201 and generates electric energy pulses; meanwhile, the processor 201 stores the electric energy data, and sends the electric energy data to the display part, namely the liquid crystal display screen M, the infrared communication interface circuit 207, the carrier communication module 204a and the CPU card interface 206 as required for output.

The combined active and forward and reverse active electric energy metering realization process comprises the following steps: the processor 201 adopts an FM33A048 microprocessor, performs data transmission with a current sampling, voltage sampling and carrier interface circuit 204 through a communication interface of a UART, reads voltage, current, power and electric energy pulse of the carrier interface circuit 204, accumulates the electric energy pulse, performs data transmission with a data storage 203 through an I2C two-wire serial bus and an SPI four-wire bus, and stores data into a data storage.

The instantaneous freezing implementation process comprises the following steps: when the master station considers that the current voltage, current, power, forward and reverse electric energy needs to be recorded, the master station sends an instant freezing command through the RS485 interface unit circuit (4) or the carrier communication module 204a, after the processor 201 receives the command, the processor performs data transmission with the current sampling, voltage sampling and carrier interface circuit 204 through the UART communication interface, reads the voltage, current, power and electric energy pulse of the carrier interface circuit 204 immediately, performs data transmission with the data storage 203 through the I2C two-wire serial bus and the SPI four-wire bus, and stores the data such as the voltage, the current, the power, the forward and reverse electric energy into the data storage.

The implementation processes of minute freezing, integral freezing, daily freezing, month freezing, appointment freezing, settlement daily freezing and stepped settlement freezing are as follows: the processor 201 is in data transmission with the data storage 203 through the I2C two-wire serial bus and the SPI four-wire bus, inquires preset minute freezing time interval, appointed freezing time, settlement day and step settlement day, when the internal clock of the processor 201 goes to the minute freezing time interval, hour, 0 o' clock, month end, appointed time, settlement day and step settlement day, the processor 201 performs data transmission with the current sampling, voltage sampling and carrier interface circuit 204 through the UART communication interface, reads the voltage, current, power and electric energy pulse of the carrier interface circuit 204, accumulates the electric energy pulse, and stores the data into the data storage through the I2C two-wire serial bus and the SPI four-wire bus and the data storage 203.

Programming event implementation process: after the processor 201 receives a programming command from the master station through the carrier communication module 204a, the processor 201 stores data such as programming times, programming time, programming items, and the like into the data storage device 203 through the I2C two-wire serial bus and the SPI four-wire bus.

The electric meter zero clearing event implementation process comprises the following steps: after the processor 201 receives the clear command from the master station through the carrier communication module 204a, the processor 201 stores the data such as the clear times, the clear time, and the electric energy at the time of clear into the data storage through the I2C two-wire serial bus and the SPI four-wire bus and the data storage 203.

The time correcting event realizing process comprises the following steps: after the processor 201 receives the timing command from the master station through the carrier communication module 204a, the processor 201 stores data such as the number of times of timing, the time before and after the timing, and the like in the data storage device 203 through the I2C two-wire serial bus and the SPI four-wire bus.

The power failure event implementation process comprises the following steps: when the processor 201 detects that the PWRDET voltage signal is lower than a set value, the power failure occurrence time is judged, when the PWRDET voltage signal is larger than the set value, the power failure ending time is judged, and when the processor 201 detects that the power failure occurs and ends, data such as power failure times, power failure sending time, settlement time and the like are stored in the data storage through the I2C two-wire serial bus, the SPI four-wire bus and the data storage 203.

The implementation process of the switching-on and switching-off event comprises the following steps: after the processor 201 receives a switching command from the master station through the RS485 interface unit circuit (4) or the carrier communication module 204a, the processor 201 stores data such as switching times, switching time, and switching electric energy into the data storage device 203 through the I2C two-wire serial bus and the SPI four-wire bus.

The clock failure event implementation process comprises the following steps: when the processor 201 detects that the clock is reversed, disordered in format, or the power-on time is shorter than the power-off time or longer than the power-off time by 1000 days or the like in the running process or the power-off process, the processor 201 stores data such as the clock failure times, the failure occurrence time, the ending time, corresponding electric energy and the like into the data storage through the I2C two-wire serial bus and the SPI four-wire bus and the data storage 203.

The metering chip fault event implementation process comprises the following steps: when the processor 201 detects that the current sampling, voltage sampling and carrier interface circuit 204 of the communication interface through the UART fails to communicate and the duration is longer than the set determination delay time, the processor 201 stores data such as the number of failures, the occurrence of the failures, the end time, and the corresponding electric energy into the data storage device 203 through the I2C two-wire serial bus and the SPI four-wire bus.

The zero line current abnormal event implementation process comprises the following steps: when the processor 201 detects that the unbalance rates of the zero line current and the live line current are larger than the unbalance rate limit value and the duration is larger than the set judgment delay time when the processor 201 communicates through the current sampling, the voltage sampling and the carrier interface circuit 204 of the communication interface of the UART, the processor 201 stores data such as the failure times, the failure occurrence time and the end time into the data storage device through the I2C two-wire serial bus and the SPI four-wire bus and the data storage device 203.

The implementation process of the case opening event comprises the following steps: when the processor 201 detects that the tail11 signal is at a high level, the electric meter is judged to be in an uncovering state, and when the tail11 signal is at a low level, the electric meter is judged to be in a covering state, and at the moment, the processor 201 stores data such as the failure frequency, the failure occurrence time, the ending time and the corresponding electric energy into the data storage device through the I2C two-wire serial bus and the SPI four-wire bus and the data storage device 203.

And (3) an overcurrent event implementation process: when the processor 201 detects that the live wire current is greater than the set overcurrent event current trigger lower limit and the duration is greater than the set overcurrent event determination delay time when the processor 201 communicates through the current sampling, voltage sampling and carrier interface circuit 204 of the communication interface of the UART, the processor 201 stores data such as the number of failures, the occurrence and end times of the failures, and corresponding electric energy into the data storage device 203 through the I2C two-wire serial bus and the SPI four-wire bus.

The meter has time-sharing and multi-rate accurate measurement combined active and forward and reverse active electric energy, and has freezing records of various electric energy data such as instantaneous freezing, minute freezing, integral freezing, daily freezing, month freezing, appointed freezing, settlement daily freezing, stepped settlement freezing and the like; the method has the advantages of programming, ammeter zero clearing, time correction, power failure, switching on and switching off, clock faults, metering chip faults, zero line current abnormity, meter cover opening, overcurrent and other events. And all events support active reporting, and the reported events can be set. The electric energy meter can monitor a plurality of dynamic parameters such as power grid voltage, current, apparent power, power factors and the like in real time; the external effective communication command can be responded through communication modes such as infrared, RS485, carrier waves and the like, and data reading, parameter setting and the like of the electric energy meter are completed.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the utility model, or those unrelated to enabling the utility model).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims (10)

1. Single-phase local charge control intelligent ammeter, its characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the device comprises a collecting unit (100), wherein the collecting unit (100) comprises a current sampling circuit (101), a voltage sampling circuit (102), a metering processing connecting circuit (103) and a metering processing chip (104), the current sampling circuit (101) and the voltage sampling circuit (102) are connected with a service phase line and a zero line, the current sampling circuit (101) and the voltage sampling circuit (102) are electrically connected with the metering processing connecting circuit (103), and the metering processing connecting circuit (103) is electrically connected with the metering processing chip (104);

the device comprises a processing unit (200), wherein the processing unit (200) comprises a processor (201) and a remote connection module (202), the metering processing chip (104) is electrically connected with the processor (201), the processor (201) is electrically connected with the remote connection module (202) in a bidirectional mode, and the remote connection module (202) provides remote information transmission for the metering processing chip (104).

2. The single-phase local cost-controlled intelligent electric energy meter according to claim 1, characterized in that: the remote connection module (202) comprises a UART serial bus (201a) and an RS485 interface (201b), the processor (201) is connected with the RS485 interface (202b) through the UART serial bus (202a), and is connected with the central station through the RS485 interface (201b) and sends information to the central station.

3. The single-phase local cost-control intelligent electric energy meter according to claim 2, wherein: still include power supply unit (300), power supply unit (300) include transformer (301) and power supply circuit (302), transformer (301) electric connection is imported phase line and zero line, transformer (301) electric connection power supply circuit (302), and power supply circuit (302) electric connection measures respectively and handles connecting circuit (103), measures processing chip (104), treater (201) and remote connection module (202).

4. The single-phase local cost-controlled intelligent electric energy meter according to claim 3, characterized in that: the power supply unit (300) further comprises a battery (303) and a battery switching circuit (304), the battery (303) is electrically connected with the battery switching circuit (304), the battery switching circuit (304) is electrically connected with the power supply circuit (302), and the battery switching circuit (304) is electrically connected with the processor (201) in a bidirectional mode.

5. The single-phase local cost-controlled intelligent electric energy meter according to claim 1, characterized in that: the FLASH memory is characterized by further comprising a data memory (203), wherein the data memory (203) comprises an EEPROM data memory (203a) and a FLASH data memory (203b), and the processor (201) is respectively connected with the EEPROM data memory (203a) and the FLASH data memory (203b) through an I2C two-wire serial bus and an SPI four-wire serial bus.

6. The single-phase local cost-controlled intelligent electric energy meter according to claim 1, characterized in that: the system also comprises a carrier interface circuit (204), the processor (201) is electrically connected with the carrier interface circuit (204), and the carrier interface circuit (204) is electrically connected with the carrier communication module (204a) in a bidirectional mode.

7. The single-phase local cost-controlled intelligent electric energy meter according to claim 1, characterized in that: the processor (201) is electrically connected with the external pin in a bidirectional mode to the key interface circuit (205), and the key interface circuit (205) is electrically connected with the control key (A) in a bidirectional mode.

8. The single-phase local cost-controlled intelligent electric energy meter according to claim 1, characterized in that: the CPU card interface (206) is movably inserted in the CPU card interface (206), and the CPU card interface (206) is electrically connected with an external pin on the processor (201) in a bidirectional mode through the CPU card interface circuit (206 a).

9. The single-phase local cost-controlled intelligent electric energy meter according to claim 1, characterized in that: the processor (201) is electrically connected with the infrared communication interface circuit (207) in a bidirectional mode, and the infrared communication interface circuit (207) is electrically connected with the infrared receiver (207a) and the infrared transmitter (207b) respectively.

10. The single-phase local cost-controlled intelligent electric energy meter according to claim 1, characterized in that: the processor (201) is electrically connected with the liquid crystal display screen (M).

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