CN210691468U

CN210691468U - Remote prepayment smart electric meter

Info

Publication number: CN210691468U
Application number: CN201922374818.0U
Authority: CN
Inventors: 邢亮; 陈剑峰
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: 2020-06-05
Anticipated expiration: 2029-12-25

Abstract

The utility model relates to a remote 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 communication module is connected with the main control chip and used for sending the numerical information of the electric meter; 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; and the current power taking module is connected with the metering chip and is used for acquiring a current signal. The function of prepaying the electricity fee remotely is provided.

Description

Remote prepayment smart electric meter

Technical Field

The utility model belongs to the technical field of the ammeter technique and specifically relates to a remote 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, the electric meter still needs to read a display screen on the electric meter on the spot to know the degree of the electric meter, and the card is inserted to prepay the electric charge.

SUMMERY OF THE UTILITY MODEL

To the not enough that prior art exists, the utility model aims at providing a remote prepayment smart electric meter has the function of remote prepayment charges of electricity.

A remote prepaid smart meter comprising: a main control chip; the communication module is connected with the main control chip and used for sending 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; and the current power taking module is connected with the metering chip and is used for acquiring a current signal.

Further, the main control chip is an 8213 chip.

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

Further, the voltage electricity taking module comprises a voltage electricity taking unit, the voltage electricity taking unit respectively obtains voltages of three-phase electricity, the voltage electricity taking unit comprises nine resistors A5-A13 which are sequentially connected in series, a resistor A5 is connected with one phase of the three-phase electricity, a resistor A13 is grounded, and a voltage collecting point is arranged between the resistor A12 and the resistor A13.

Further, the current power-taking module comprises three current power-taking units, the current power-taking units respectively obtain currents of three phases of electricity, each current power-taking unit comprises a voltage-reducing coil T, a series resistor A1 and a resistor A2, the series resistor A3 and the resistor A4 are connected with the voltage-reducing side of the voltage-reducing coil T in parallel, two ends of the voltage-reducing side of the voltage-reducing coil T are respectively connected with a resistor A3 and a resistor A4 in series, a capacitor C1 and a capacitor C2 which are connected in series are connected between the other end of the resistor A3 and the other end of the resistor A4, the resistor A3 and the resistor A4 are grounded.

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.

To sum up, the utility model discloses a following at least one useful technological effect: the amount of electricity of the electricity meter can be read remotely through the communication module and the electricity fee is prepaid.

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 communication module;

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

fig. 5 is a circuit diagram of the IC card reading module.

In the figure, 1, a main control chip; 2. a program downloading module; 3. a program writing module; 4. a 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; 81. a voltage electricity taking unit; 9. a current power taking module; 91. a current taking unit; 10. an IC card reading module; 11. a display chip; 12. a metered communication light.

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 remote 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 communication module 4 is connected with the main control chip 1 and used for sending the electric meter numerical information; 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 a1 pin and a2 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 communication module 4 includes an optical coupler 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 electricity taking module 8 comprises a voltage electricity taking unit 81, the voltage electricity taking unit 81 respectively obtains voltages of three-phase electricity, the voltage electricity taking unit 81 comprises nine resistors A5-A13 which are sequentially connected in series, a resistor A5 is connected with one phase of the three-phase electricity, a resistor A13 is grounded, and a voltage collecting point is arranged between the resistor A12 and the resistor A13. The current electricity taking module 9 comprises three current electricity taking units 91, the current electricity taking units 91 respectively obtain currents of three phases of electricity, each current electricity taking unit 91 comprises a voltage reduction coil T, a series resistor A1 and a resistor A2 which are connected with the voltage reduction side of the voltage reduction coil T in parallel, two ends of the voltage reduction side of the voltage reduction coil T are respectively connected with a resistor A3 and a resistor A4 in series, a capacitor C1 and a capacitor C2 which are connected in series are connected between the other end of the resistor A3 and the other end of the resistor A4, the resistor A3 and the resistor A4 are grounded, and the capacitor C1 and the capacitor C2 are grounded. 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.

The utility model discloses,

optical coupler

41 and 485 communication interface 42 through communication module 4 realize being connected with the distal end backstage to realize the electric quantity of long-range reading ammeter, and the effect of prepayment charges of electricity. 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 remote prepaid smart meter, comprising:

a main control chip (1);

the communication module (4) is connected with the main control chip (1) and is used for sending 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;

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

2. A remote prepaid smart meter as claimed in claim 1, characterized in that said main control chip (1) is 8213 chip.

3. A remote prepaid smart meter according to claim 1, characterized in that said communication module (4) comprises an optical coupler (41) and a 485 communication interface (42).

4. The remote prepayment smart meter according to claim 1, wherein the voltage electricity taking module (8) comprises a voltage electricity taking unit (81), the voltage electricity taking unit (81) respectively obtains voltages of three-phase electricity, the voltage electricity taking unit (81) comprises nine resistors A5-A13 which are sequentially connected in series, a resistor A5 is connected with one phase of the three-phase electricity, the resistor A13 is grounded, and a voltage collecting point is arranged between the resistor A12 and the resistor A13.

5. The remote prepayment smart meter according to claim 1, wherein the current electricity taking module (9) comprises three current electricity taking units (91), the current electricity taking units (91) respectively obtain currents of three phases, each current electricity taking unit (91) comprises a voltage reduction coil T, a series resistor A1 and a resistor A2, the series resistor A3 and the resistor A4 are connected in parallel with the voltage reduction side of the voltage reduction coil T, two ends of the voltage reduction side of the voltage reduction coil T are respectively connected with the resistor A3 and the resistor A4, a capacitor C1 and a capacitor C2 which are connected in series are connected between the other end of the resistor A3 and the other end of the resistor A4, the resistor A3 and the resistor A4 are grounded, and the capacitor C1 and the capacitor C2 are grounded.

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

7. A remote prepaid smart meter as claimed in claim 1, characterized in that said metering chip (7) is also connected with a metering communication lamp (12) for displaying the operating status of the metering chip (7).

8. A remote prepaid smart meter as claimed in claim 1, wherein said main control chip (1) is further connected with an IC card reading module (10) for reading IC card information.