CN210666997U

CN210666997U - Prepayment smart electric meter

Info

Publication number: CN210666997U
Application number: CN201922374914.5U
Authority: CN
Inventors: 邢亮; 钟苏勇; 林章盛
Original assignee: Guangzhou Phoenix Instrument Co Ltd
Current assignee: Guangzhou Phoenix Instrument Co Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-06-02
Anticipated expiration: 2029-12-25

Abstract

The utility model relates to a prepayment smart electric meter, include: a main control chip; the program downloading module is connected with the main control chip and used for downloading the program; the program writing module is connected with the main control chip and used for writing a program; the memory is connected with the main control chip and used for storing the numerical information of the electric meter; the relay control module is connected with the main control chip and used for controlling the opening and closing of the relay; the metering chip is connected with the main control chip and used for calculating electric quantity; the voltage electricity taking module is connected with the metering chip and used for acquiring a voltage signal; the current power taking module is connected with the metering chip and used for acquiring a current signal; and the short-range communication module is connected with the main control chip and is used for carrying out short-range data transmission. Has the advantage of convenient debugging operation.

Description

Prepayment smart electric meter

Technical Field

The utility model belongs to the technical field of the ammeter technique and specifically relates to a prepayment smart electric meter is related to.

Background

Nowadays, with rapid development of science and technology, new electric energy meters are rapidly entering thousands of households.

The novel electric energy meter generally has the following functions:

1) metering and storage functions. The single-direction and bidirectional active and reactive electric energy in various time periods can be measured; the measurement and display of parameters such as current power, demand, power factor and the like can be completed. The data of at least the last meter reading period can be stored.

2) A monitoring function. Customer power and maximum demand can be monitored and their theft behavior prevented by analyzing the customer power load curve.

3) And (5) controlling functions. Time slot control and load control can be performed for the client. The former is used for multi-rate time-sharing charging; the latter means that the load is controlled by receiving remote control commands through the communication interface or by programming inside the meter (taking into account the time period and the load rating). The electronic electric energy meter with the IC card interface not only can complete the prepayment function, but also has the functions of alarm delay and brake-pull power failure control when the purchased electric energy is used up.

4) And (5) management functions. The electronic electric energy meter is connected with a communication network or a meter reading system of the electric power system through a communication interface, and remote data exchange with the outside is realized. The client server with authority in the power network can accurately set time interval, time interval rate, time interval power limit, residual electric quantity alarm limit, representative day, freezing day, demand mode, time, slip and the like by utilizing the address code (generally 12 decimal digits) of the electric energy meter; calling and checking the real-time power of a client; and reading the related electricity consumption, and transmitting the electric energy metering information to corresponding departments as required for system scheduling, electric energy control, electric energy exchange, business charging and the like.

However, when the electric meter needs to be debugged, the electric meter can be debugged only by connecting the data line with the corresponding port to the debugging equipment, and when the position of the electric meter is at a higher position, the operation is inconvenient.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a prepayment smart electric meter has the advantage of the debugging operation of being convenient for.

A prepaid smart meter comprising: a main control chip; the program downloading module is connected with the main control chip and used for downloading the program; the program writing module is connected with the main control chip and used for writing a program; the memory is connected with the main control chip and used for storing the numerical information of the electric meter; the relay control module is connected with the main control chip and used for controlling the opening and closing of the relay; the metering chip is connected with the main control chip and used for calculating electric quantity; the voltage electricity taking module is connected with the metering chip and used for acquiring a voltage signal; the current power taking module is connected with the metering chip and used for acquiring a current signal; and the short-range communication module is connected with the main control chip and is used for carrying out short-range data transmission.

Further, the main control chip is an 8213 chip.

Further, the remote communication module includes an optical coupler and a 485 communication interface.

Further, the short-range communication module is an infrared transceiver circuit.

Further, the relay control module is an MA8023 chip.

Further, the model of the metering chip is RN 8302B.

Furthermore, the voltage sampling module comprises three groups of circuits formed by a plurality of series resistors, and each group of circuits is respectively connected with one phase of three-phase current of the ammeter.

Furthermore, the relay control module is connected with a relay, and the relay is connected with a three-phase relay.

Furthermore, the metering chip is also connected with a metering communication lamp for displaying the working state of the metering chip.

Furthermore, the main control chip is also connected with an IC card reading module for reading the information of the IC card.

Further, the short-range communication module (13) is provided with an infrared receiving head, and the type of the infrared receiving head is HS 138-W.

To sum up, the utility model discloses a following at least one useful technological effect: the short-range communication module can be used for debugging without being connected with an ammeter through a data line, and the operation is convenient.

Drawings

FIG. 1 is a circuit diagram of a main control chip and other components;

FIG. 2 is a circuit schematic of a relay control module;

FIG. 3 is a circuit schematic of a telecommunications module;

FIG. 4 is a schematic circuit diagram of a metrology chip or like component;

FIG. 5 is a circuit diagram of an IC card reading module;

fig. 6 is a circuit schematic of a short-range communication module.

In the figure, 1, a main control chip; 2. a program downloading module; 3. a program writing module; 4. a remote communication module; 41. an optical coupler; 42. 485 communication interface; 5. a memory; 6. a relay control module; 61. a relay; 62. a three-phase relay; 7. a metering chip; 8. a voltage electricity taking module; 9. a current power taking module; 10. an IC card reading module; 11. a display chip; 12. a metering communication light; 13. a short-range communication module.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Do the utility model discloses a pair of prepayment smart electric meter, include: a main control chip 1; the program downloading module 2 is connected with the main control chip 1 and is used for downloading programs; the program writing module 3 is connected with the main control chip 1 and is used for writing a program; the remote communication module 4 is connected with the main control chip 1 and used for sending the numerical information of the electric meter; the memory 5 is connected with the main control chip 1 and used for storing the numerical information of the electric meter; the relay control module 6 is connected with the main control chip 1 and used for controlling the opening and closing of the relay 61; the metering chip 7 is connected with the main control chip 1 and used for calculating electric quantity; the voltage electricity taking module 8 is connected with the metering chip 7 and used for acquiring a voltage signal; and the current taking module 9 is connected with the metering chip 7 and is used for acquiring a current signal.

As shown in fig. 1, which is a schematic structural diagram of a main control chip 1, in this embodiment, the main control chip 1 is an 8213 chip, a program downloading module 2 is connected to a 19 pin of the 8213 chip, and a program writing module 3 is connected to a 1 pin and a 2 pin of the 8213 chip. Memory 5, model AT24C02, is connected to

pins

56 and 57 of the 8213 chip. 8213 the chip is connected to the display chip 11. The model of the display chip 11 is ML-0018, and is connected with 35-41 pins and 43-49 pins of an 8213 chip.

As shown in fig. 2, the 8213 chip is also connected to the relay control module 6, the relay control module 6 is connected to the relay 61, and the relay 61 is connected to the three-phase relay 62. When the 8213 chip judges that the power-off condition is met, the three-phase relay 62 is controlled to be powered off through the relay control module 6. The power-off condition includes power-rate arrearage, current overload, and the like. The relay control module 6 is an MA8023 chip.

As shown in fig. 3, the telecommunications module 4 comprises an optocoupler 41 and a 485 communication interface 42.

As shown in fig. 4, the model number of the metering chip 7 is RN 8302B. The voltage sampling module comprises three groups of circuits formed by a plurality of series resistors, and each group of circuits is respectively connected with one phase of three-phase current of the electric meter. The current sampling module obtains electricity through the transformer coil. The metering chip 7 is also connected with a metering communication lamp 12 for displaying the working state of the metering chip 7. The metering chip 7 is also connected with a metering communication lamp 12 for displaying the working state of the metering chip 7.

As shown in fig. 5, the 8214 chip is further connected to an IC card reading module 10 for reading IC card information, and an LM358 or LM258 chip is used.

As shown in fig. 6, the short-range communication module 13 is an infrared transceiver circuit, and the debugging of the main control chip 1 can be realized through infrared communication. The model of an infrared receiving head of the infrared transceiving circuit is HS 138-W.

The utility model discloses, can debug convenient operation without being connected the data line with the ammeter through short range communication module 13. The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A prepaid smart meter, comprising:

a main control chip (1);

the program downloading module (2) is connected with the main control chip (1) and is used for downloading the program;

the program writing module (3) is connected with the main control chip (1) and is used for writing a program;

the memory (5) is connected with the main control chip (1) and is used for storing the numerical information of the electric meter;

the relay control module (6) is connected with the main control chip (1) and is used for controlling the opening and closing of the relay (61);

the metering chip (7) is connected with the main control chip (1) and is used for calculating electric quantity;

the voltage electricity taking module (8) is connected with the metering chip (7) and is used for acquiring a voltage signal;

the current power taking module (9) is connected with the metering chip (7) and is used for acquiring a current signal;

and the short-range communication module (13) is connected with the main control chip (1) and is used for carrying out short-range data transmission.

2. A prepaid smart meter according to claim 1, characterised in that said main control chip (1) is an 8213 chip.

3. A prepaid smart meter according to claim 1, characterised in that it also comprises a remote communication module (4) connected to the main control chip (1) for transmitting the meter value information, said remote communication module (4) comprising an optical coupler (41) and a 485 communication interface (42).

4. A prepaid smart meter according to claim 1, characterised in that said short-range communication module (13) is an infrared transceiver circuit.

5. A prepaid smart meter according to claim 1, characterised in that said relay control module (6) is a MA8023 chip.

6. A prepaid smart meter according to claim 1, characterised in that the type of said metering chip (7) is RN 8302B.

7. The prepaid smart meter according to claim 1, characterized in that the voltage electricity-taking module (8) comprises three groups of circuits formed by a plurality of series resistors, each group of circuits being connected to one of the three phases of current of the meter.

8. A prepaid smart meter according to claim 1, characterised in that said relay control module (6) is connected to a relay (61), said relay (61) being connected to a three-phase relay (62).

9. A prepaid smart meter according to claim 1, characterised in that said short-range communication module (13) is an infrared receiver head of the type HS 138-W.