CN203535721U - Cassette electric meter - Google Patents

Abstract

The utility model relates to the field of power supply statistics, in particular to a card-type smart meter, which includes a PIC microcontroller, a data memory connected to the PIC microcontroller, a meter thick-film circuit, a smart card control device, a relay switch, a liquid crystal display and Smart alarm. The utility model improves the safety of the electric meter system, simplifies the circuit structure, reduces the cost, and improves the practicability and simplicity of the system operation.

Description

A card-type smart meter

technical field

The utility model relates to the field of power supply statistics, in particular to a card type smart electric meter.

Background technique

The role of electricity in modern people's life is irreplaceable. People use various equipment, instruments and devices based on electricity all the time in their daily life, study and work. Therefore, how to better, effectively and safely manage electricity consumption has become an important task for power supply enterprises. Among them, the measurement and statistics of electricity consumption by users is particularly important. At present, the devices used for electricity measurement mainly include traditional mechanical meters, centralized meters and card meters. Traditional mechanical watt-hour meters traditionally refer to inductive mechanical watt-hour meters, which use the principle of electromagnetic induction and are mainly composed of voltage coils, current coils, aluminum disks, permanent magnets, and counters. When the ammeter is energized, an electromagnetic field is generated in the current coil and the voltage coil, and a rotational torque is formed on the aluminum disc, which drives the counter to count through the transmission gear. The greater the current and voltage, the greater the torque, the faster the count, and the more electricity is consumed The rotational torque of the disc is proportional to the active power of the load. This kind of electric meter needs to be read and recorded manually, the operation and management are troublesome, and it does not have any special functions. It is increasingly unsuitable for the increasing power demand of modern society. The centralized meter is a kind of low-voltage carrier centralized meter reading. Its technical solution has great advantages, but the disadvantage is that the periodic and continuous interference signals on the grid line and the random burst and variability of the interference affect the The stability of data transmission, in addition, the technical solution of the product (telephone line + carrier communication) is fundamentally unable to adapt to various domestic power grid structures, and the real-time performance of copying data is very low, so it is difficult to ensure that the complete station area is collected every day. data. At the same time, due to the low communication rate of the telephone line itself, the online monitoring and automatic alarm functions cannot be realized, so the actual use of the product is greatly limited.

As a key component of the effective management and measurement of electricity in the power supply system, the ammeter system is also an important factor that directly affects the quality of the entire power supply network.

Utility model content

The purpose of the utility model is to provide a card-type intelligent electric meter, which solves the problems of complicated operation, low automation and unstable centralized electric meter of the existing mechanical electric meter.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions: a card-type smart meter, including a PIC microcontroller, and a data memory connected to the PIC microcontroller, a meter thick-film circuit, a smart card control device, and a relay Switches, LCD displays and smart alarms;

The PIC micro-controller takes out the user power data stored in the data memory and displays it on a liquid crystal display, and then judges whether there is a metering pulse through logical operation processing, and if there is a metering pulse, then starts counting and calculation functions;

The electric meter thick film circuit calculates real-time user electricity consumption;

When the user's electricity consumption is less than a predetermined value, the intelligent alarm device receives an instruction output from the thick-film circuit of the meter and sends out an electricity purchase prompt;

The smart card control device is connected to the data memory through the data line, connected to the IC card inserted by the user, and reads the data on the IC card;

The relay switch sends an instruction to turn off the power meter switch after the smart alarm sends out a power purchase prompt and the electric quantity continues to drop to a predetermined value, so as to stop the power supply to the user, and the power meter also enters a shutdown waiting state.

A further technical solution is that the relay switch is a time-delay relay switch.

A further technical solution is that the smart card control device includes an IC card controller, a PIC microcontroller and an IC card reader.

A further technical solution is that the PIC microcontroller is connected with a power circuit, and the power circuit is provided with a UPS uninterruptible power supply.

A further technical solution is that the liquid crystal display is a segment liquid crystal display.

Compared with the prior art, the beneficial effects of the utility model are:

1. The utility model integrates the movement of the traditional electric meter and the high-level measurement and control circuit into an integral watch case, which not only maintains the measurement accuracy, but also has the automatic management function of the meter measurement operation state, and can effectively prevent artificial The control failure behavior caused by destroying the system and unauthorized opening of the IC card control system improves the safety of the meter system.

2. The utility model adopts the PIC series microcontroller as the control module of the electric meter system, which has the advantages of high sensitivity, low working voltage and low power consumption. At the same time, it adopts serial communication mode to connect and communicate with peripheral devices such as IC cards. The circuit structure is simplified, thereby reducing the cost.

3. The utility model adopts the selected segment liquid crystal display, which can be used to display the current system time, time set by the user, pre-stored amount, flow rate, temperature, pressure and error information according to different button operations. Thus, a good human-computer interaction interface is established, and the practicability and simplicity of system operation are improved.

Description of drawings

Fig. 1 is a schematic connection diagram of an embodiment of a card-type smart meter of the present invention.

Fig. 2 is a schematic connection diagram of a preferred embodiment of a card-type smart meter of the present invention.

Fig. 3 is a connection schematic diagram of another preferred embodiment of a card-type smart meter of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Fig. 1 has shown an embodiment of a kind of card-type smart meter of the present invention: a kind of card-type smart meter, comprises PIC micro-controller, and the data memory that is respectively connected with PIC micro-controller, electric meter thick-film circuit, smart card Control device, relay switch, liquid crystal display and intelligent alarm;

The PIC micro-controller takes out the user power data stored in the data memory and displays it on a liquid crystal display, and then judges whether there is a metering pulse through logical operation processing, and if there is a metering pulse, then starts counting and calculation functions;

The electric meter thick film circuit calculates real-time user electricity consumption;

When the user's electricity consumption is less than a predetermined value, the intelligent alarm device receives an instruction output from the thick-film circuit of the meter and sends out an electricity purchase prompt;

The smart card control device is connected to the data memory through the data line, connected to the IC card inserted by the user, and reads the data on the IC card;

The relay switch sends an instruction to turn off the power meter switch after the smart alarm sends out a power purchase prompt and the electric quantity continues to drop to a predetermined value, so as to stop the power supply to the user, and the power meter also enters a shutdown waiting state.

According to a preferred embodiment of the card-type smart meter of the present invention, the relay switch is a time-delay relay switch. Since the delay performance of the time relay can be adjusted within the design range, it is convenient to adjust the delay time of the opening and closing of the meter system, thereby effectively solving the problem of wrong operation of the system due to insufficient power, and improving the system operation. safety and reliability.

Fig. 2 shows another preferred embodiment of a card-type smart meter of the present invention, the smart card control device includes an IC card controller, a PIC microcontroller and an IC card reader.

Fig. 3 has shown another preferred embodiment of a kind of card-type intelligent electric meter of the present utility model, and described intelligent card control device comprises IC card controller, PIC single-chip microcomputer and IC card reader, in order to ensure electric meter system due to abnormal power-off accident And the problem of data loss caused by system shutdown, the PIC microcontroller is connected with a power circuit, and the power circuit is provided with a UPS uninterruptible power supply, thereby ensuring the integrity of the data of the meter system in the case of an abnormal power failure. sex. In addition, the UPS uninterruptible power supply is preferably a backup type, but it is not limited to this, and can also be selected according to actual conditions.

According to another preferred embodiment of a card-type smart meter of the present invention, the liquid crystal display is a segment liquid crystal display, which can respectively display the current system time, the time set by the user, the pre-stored amount, flow rate, temperature, pressure and error information, improving the practicality and simplicity of system operation.

The working principle of the utility model is: when the thick-film circuit of the electric meter sends a pulse number or the user inserts the IC card through the smart card control device, the electric meter enters the corresponding working state. The main function of the PIC microcontroller is to take out the user’s power data stored in the meter data memory and display it on the liquid crystal display, and then further judge whether there is a metering pulse through logical operation processing, and start counting and calculation functions if there is a metering pulse. The thick film circuit of the electric meter is an electric energy measurement chip, and its main function is to calculate the real-time electricity consumption of the user. In addition, if the value is less than a set value, the meter will output an instruction to issue a power purchase reminder through the smart alarm. If no electricity is purchased, the relay switch will issue an instruction to turn off the meter switch, stop the power supply to the user, and the meter will also Enter the shutdown waiting state. When the household inserts the IC card that has already purchased electricity into the IC card interface of the smart card control device of the electric energy meter, the electric energy meter is woken up, and at this time, the electric meter decrypts the pre-purchased electric quantity data stored in the IC card and compares it with the remaining value of the original user’s pre-purchased electric quantity. Add the new remaining power value of the user, and erase the pre-purchased power data stored in the IC card at the same time. The relay switch is turned on, thereby restoring the electric energy supply to the user, and the electric energy meter then enters the metering state again. The remaining value of pre-purchased electricity, accumulated electricity, etc. can be selected and viewed through the human interaction interface of the liquid crystal display with buttons.

Claims (5)

1. A card-type smart ammeter, characterized in that: comprise a PIC microcontroller, and a data store connected to the PIC microcontroller respectively, an ammeter thick-film circuit, a smart card control device, a relay switch, a liquid crystal display and an intelligent alarm; The PIC micro-controller takes out the user power data stored in the data memory and displays it on a liquid crystal display, and then judges whether there is a metering pulse through logical operation processing, and if there is a metering pulse, then starts counting and calculation functions; The electric meter thick film circuit calculates real-time user electricity consumption; When the user's electricity consumption is less than a predetermined value, the intelligent alarm device receives an instruction output from the thick-film circuit of the meter and sends out an electricity purchase prompt; The smart card control device is connected to the data memory through the data line, connected to the IC card inserted by the user, and reads the data on the IC card; The relay switch sends an instruction to turn off the power meter switch after the smart alarm sends out a power purchase prompt and the electric quantity continues to drop to a predetermined value, so as to stop the power supply to the user, and the power meter also enters a shutdown waiting state. 2 . The card-type smart meter according to claim 1 , wherein the relay switch is a time-delay relay switch. 3 . 3. A card-type smart meter according to claim 1, characterized in that: the smart card control device comprises an IC card controller, a PIC microcontroller and an IC card reader. 4. A card-type smart meter according to any one of claims 1, 2 or 3, characterized in that: the PIC microcontroller is connected to a power circuit, and the power circuit is provided with a UPS uninterruptible power supply. 5. A card-type smart meter according to any one of claims 1, 2 or 3, wherein the liquid crystal display is a segment liquid crystal display.

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