CN214504520U - Prepayment electric energy meter with high protective performance - Google Patents
Prepayment electric energy meter with high protective performance Download PDFInfo
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- CN214504520U CN214504520U CN202120831736.9U CN202120831736U CN214504520U CN 214504520 U CN214504520 U CN 214504520U CN 202120831736 U CN202120831736 U CN 202120831736U CN 214504520 U CN214504520 U CN 214504520U
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Abstract
The utility model relates to a prepayment electric energy meter with high barrier propterty, including base, seat cover, terminal seat, terminal cover and the measurement circuit of setting in the base, form code input button on the seat cover, measurement circuit includes main control unit, electrical unit, code button input unit, current sampling unit, voltage sampling unit, drive unit, display element, outside alternating current is connected respectively to current sampling unit's input and voltage sampling circuit's input, and main control unit's input is connected respectively to current sampling unit's output, voltage sampling unit's output, code button input unit's output, main control unit's input and display element's input are connected respectively to main control unit's output. The utility model discloses prepayment electric energy meter adopts the code to supplement the reliability and the security that the mode improves the charges of electricity and supplements with money structurally to reduce the fault rate of using, have the advantage that the sampling precision is high, the measurement is accurate simultaneously.
Description
Technical Field
The utility model relates to a prepayment electric energy meter especially relates to a prepayment electric energy meter with high barrier propterty.
Background
At present, the electric energy meter is widely applied to the work of electric energy metering and charging, the prepayment electric energy meter is one of a plurality of electric energy meter types, the prepayment electric energy meter has the metering function of a common electric energy meter, particularly, a user firstly buys electricity and can use the electricity after buying the electricity, and if the user does not continuously buy the electricity after using the electricity, the power supply is automatically cut off to stop supplying the electricity. The existing prepayment electric energy meter adopts an IC card to realize prepayment function, the prepayment electric quantity or amount is written into a special electronic card (a memory), the special electronic card (the memory) is handed to a user to hold the electronic card to a corresponding electric energy meter for communication, and the prepayment value is automatically sent into the electric energy meter, so the prepayment electric energy meter is usually provided with an IC card socket, and the card-inserted IC prepayment electric energy meter is easily affected by the outside and even attacked by a man-made chip, so that the prepayment electric energy meter is damaged and can not work normally; and the sampling unit on the metering circuit in the existing prepayment electric energy meter has the defects of complex components and low sampling precision.
Disclosure of Invention
In view of this, the utility model aims at providing a prepayment electric energy meter with high barrier propterty improves the reliability and the security that the charges of electricity were supplemented with money to reduce the fault rate of use, have the advantage that the sampling precision is high, the measurement is accurate simultaneously.
In order to achieve the above object, the utility model discloses a prepayment electric energy meter with high protection performance, including base, the seat cover connected on the base, set up the terminal seat in the base, connect the terminal cover on the base and set up the measurement circuit in the base, form the code input button on the seat cover, the measurement circuit includes main control unit, power supply unit, code button input unit, current sampling unit, voltage sampling unit, drive unit, display element, the input of current sampling unit and the input of voltage sampling circuit are connected with external alternating current respectively, include the output of current sampling unit, the output of voltage sampling unit, the output of code button input unit are connected with the input of main control unit respectively, the output of main control unit is connected with the input of drive unit and the input of display element respectively, the power supply unit is used for providing working voltage for the main controller unit, the driving unit and the display unit respectively, the current sampling unit comprises a SHUNT current sampling unit and a current transformer current sampling unit, the SHUNT current sampling unit comprises a SHUNT resistor SHUNT, a resistor R14, a resistor R15, a capacitor C10 and a capacitor C11, two ends of the SHUNT resistor SHUNT are connected with an external alternating current power supply respectively, one end of the resistor R14 and one end of the resistor R15 are connected with two ends of the SHUNT resistor SHUNT respectively, the other end of the resistor R14 is connected with one end of the capacitor C10, one end of the resistor R15 is connected with one end of the capacitor C11, the other end of the capacitor C10 and the other end of the capacitor C11 are grounded, and one end of the capacitor C10 and one end of the capacitor C11 output current sampling signals to the input end of the main controller unit; the current transformer current sampling unit comprises a current transformer CT, a resistor R16, a resistor R17, a resistor R18, a resistor R19, a capacitor C12 and a capacitor C13, wherein the input end of the current transformer CT is connected with external alternating current, the output end of the current transformer CT is respectively connected with one end of a resistor R16, one end of a resistor R17, one end of a resistor R18 and one end of a resistor R19, the other end of the resistor R16 is connected with one end of a capacitor C12, the other end of the resistor R17 is connected with one end of a capacitor C13, the other end of the resistor R18, the other end of the resistor R19, the other end of the capacitor C12 and the other end of the capacitor C13 are connected in a common mode, and one end of the capacitor C12 and one end of the capacitor C13 output current sampling signals to the input end of the main controller unit.
The prepayment electric energy meter improves the structure and the metering circuit: 1. the socket cover of the prepaid electric energy meter is improved, the conventional IC card socket is cancelled, the code input key is newly arranged, the user obtains the code generated by the prepaid electricity selling management system after paying a certain amount of money and purchasing electricity, and inputs the code into the prepaid electric energy meter through the code input key to complete electricity purchasing, so that the electricity purchasing and recharging mode of the prepaid electric energy meter is not easily subjected to external interference and chip attack, and has higher protective performance; 2. the current sampling unit of metering circuit adopts shunt current sampling and current transformer current sampling dual mode simultaneously, wherein shunt current sampling has better linear index when the resistance of less temperature coefficient is selected to the circuit, current transformer current sampling realizes that high-low voltage circuit keeps apart, increase the interference killing feature of ammeter, secondary current signal is difficult for receiving space electromagnetic signal interference, can remote transmission, current sampling can realize the complementation of both current samplings like this, current signal's sampling precision is improved, thereby make the measurement precision of electric energy meter improve, and this circuit components and parts constitute simply, low in production cost.
The utility model discloses further set up to still including memory cell, alarm unit, the main control unit is connected with memory cell, alarm unit's input is connected to the output of main control unit.
The storage unit is used for storing historical electric power data of the electric energy meter, and the alarm unit is used for giving an alarm when the electric charge is insufficient.
The utility model is further provided that the code key input unit comprises at least 12 input keys.
The utility model is further set as the model of the main controller unit is V9811S.
The main controller unit of the type has the advantages of multipath high-performance oversampling and low power consumption, and the current sampling can also meet the input of two signals of current of the current transformer and the current divider.
Drawings
Fig. 1 is a perspective view of an embodiment of the present invention.
Fig. 2 is a schematic block diagram of a metering circuit according to an embodiment of the present invention.
Fig. 3 is a schematic circuit diagram of a current sampling unit according to an embodiment of the present invention.
Fig. 4 is a schematic circuit diagram of a current sampling unit of a current transformer according to an embodiment of the present invention.
Fig. 5 is a schematic circuit diagram of a code key input unit according to an embodiment of the present invention.
Fig. 6 is a schematic circuit diagram of a main controller unit according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1-6, the utility model relates to a prepayment electric energy meter with high barrier propterty, including base, the seat cover of connection on the base, set up terminal seat in the base, connect the terminal cover on the base and set up the measurement circuit in the base, form code input button on the seat cover, the measurement circuit includes main control unit, power supply unit, code button input unit, current sampling unit, voltage sampling unit, drive unit, display element, memory cell, alarm unit, the model of main control unit is V9811S, code button input unit includes that at least 12 input buttons are used for purchasing the input and the operation of electric code, main control unit is connected with memory cell, outside alternating current is connected respectively to the input of current sampling unit and voltage sampling circuit's input, include the output of current sampling unit, The output end of the voltage sampling unit and the output end of the code key input unit are respectively connected with the input end of the main controller unit, the output end of the main controller unit is respectively connected with the input end of the driving unit, the input end of the display unit and the input end of the alarm unit, the power supply unit is respectively used for providing working voltage for the main controller unit, the driving unit, the display unit, the storage unit and the alarm unit, the current sampling unit comprises a SHUNT current sampling unit and a current transformer current sampling unit, the SHUNT current sampling unit comprises a SHUNT resistor SHUNT, a resistor R14, a resistor R15, a capacitor C10 and a capacitor C11, two ends of the SHUNT resistor SHUNT are respectively connected with an external alternating current power supply, one end of the resistor R14 and one end of the resistor R15 are respectively connected with two ends of the SHUNT resistor SHUNT, the other end of the resistor R14 is connected with one end of the capacitor C10, one end of the resistor R15 is connected with one end of the capacitor C11, the other end of the capacitor C10 and the other end of the capacitor C11 are both grounded, and one end of the capacitor C10 and one end of the capacitor C11 output current sampling signals to the input end of the main controller unit; the current transformer current sampling unit comprises a current transformer CT, a resistor R16, a resistor R17, a resistor R18, a resistor R19, a capacitor C12 and a capacitor C13, wherein the input end of the current transformer CT is connected with external alternating current, the output end of the current transformer CT is respectively connected with one end of a resistor R16, one end of a resistor R17, one end of a resistor R18 and one end of a resistor R19, the other end of the resistor R16 is connected with one end of a capacitor C12, the other end of the resistor R17 is connected with one end of a capacitor C13, the other end of the resistor R18, the other end of the resistor R19, the other end of the capacitor C12 and the other end of the capacitor C13 are connected in a common mode, and one end of the capacitor C12 and one end of the capacitor C13 output current sampling signals to the input end of the main controller unit.
According to the above embodiment, the utility model discloses prepayment electric energy meter is through improving structure and measurement circuit: 1. the socket cover of the prepaid electric energy meter is improved, the conventional IC card socket is cancelled, the code input key is newly arranged, the user obtains the code generated by the prepaid electricity selling management system after paying a certain amount of money and purchasing electricity, and inputs the code into the prepaid electric energy meter through the code input key to complete electricity purchasing, so that the electricity purchasing and recharging mode of the prepaid electric energy meter is not easily subjected to external interference and chip attack, and has higher protective performance; 2. the current sampling unit of metering circuit adopts shunt current sampling and current transformer current sampling dual mode simultaneously, wherein shunt current sampling has better linear index when the resistance of less temperature coefficient is selected to the circuit, current transformer current sampling realizes that high-low voltage circuit keeps apart, increase the interference killing feature of ammeter, secondary current signal is difficult for receiving space electromagnetic signal interference, can remote transmission, current sampling can realize the complementation of both current samplings like this, current signal's sampling precision is improved, thereby make the measurement precision of electric energy meter improve, and this circuit components and parts constitute simply, low in production cost.
Claims (4)
1. The utility model provides a prepayment electric energy meter with high barrier propterty, includes the base, connects the seat cover on the base, sets up terminal seat in the base, connects the terminal cover on the base and sets up the metering circuit in the base, its characterized in that: the seat cover is provided with a code input key, the metering circuit comprises a main controller unit, a power supply unit, a code key input unit, a current sampling unit, a voltage sampling unit, a driving unit and a display unit, the input end of the current sampling unit and the input end of the voltage sampling circuit are respectively connected with external alternating current, the output end of the current sampling unit, the output end of the voltage sampling unit and the output end of the code key input unit are respectively connected with the input end of the main controller unit, the output end of the main controller unit is respectively connected with the input end of the driving unit and the input end of the display unit, the power supply unit respectively provides working voltage for the main controller unit, the driving unit and the display unit,
the current sampling unit comprises a SHUNT current sampling unit and a current transformer current sampling unit, the SHUNT current sampling unit comprises a SHUNT resistor SHUNT, a resistor R14, a resistor R15, a capacitor C10 and a capacitor C11, two ends of the SHUNT resistor SHUNT are respectively connected with an external alternating current power supply, one end of the resistor R14 and one end of the resistor R15 are respectively connected with two ends of the SHUNT resistor SHUNT, the other end of the resistor R14 is connected with one end of the capacitor C10, one end of the resistor R15 is connected with one end of the capacitor C11, the other end of the capacitor C10 and the other end of the capacitor C11 are both grounded, and one end of the capacitor C10 and one end of the capacitor C11 output current sampling signals to an input end of a main controller unit; the current transformer current sampling unit comprises a current transformer CT, a resistor R16, a resistor R17, a resistor R18, a resistor R19, a capacitor C12 and a capacitor C13, wherein the input end of the current transformer CT is connected with external alternating current, the output end of the current transformer CT is respectively connected with one end of a resistor R16, one end of a resistor R17, one end of a resistor R18 and one end of a resistor R19, the other end of the resistor R16 is connected with one end of a capacitor C12, the other end of the resistor R17 is connected with one end of a capacitor C13, the other end of the resistor R18, the other end of the resistor R19, the other end of the capacitor C12 and the other end of the capacitor C13 are connected in a common mode, and one end of the capacitor C12 and one end of the capacitor C13 output current sampling signals to the input end of the main controller unit.
2. The prepaid electric energy meter with high protection performance according to claim 1, wherein: the intelligent alarm system is characterized by further comprising a storage unit and an alarm unit, the main controller unit is connected with the storage unit, and the output end of the main controller unit is connected with the input end of the alarm unit.
3. The prepaid electric energy meter with high protection performance according to claim 1 or 2, characterized in that: the code key input unit includes at least 12 input keys.
4. The prepaid electric energy meter with high protection performance according to claim 1 or 2, characterized in that: the model number of the main controller unit is V9811S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120831736.9U CN214504520U (en) | 2021-04-22 | 2021-04-22 | Prepayment electric energy meter with high protective performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120831736.9U CN214504520U (en) | 2021-04-22 | 2021-04-22 | Prepayment electric energy meter with high protective performance |
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| Publication Number | Publication Date |
|---|---|
| CN214504520U true CN214504520U (en) | 2021-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120831736.9U Active CN214504520U (en) | 2021-04-22 | 2021-04-22 | Prepayment electric energy meter with high protective performance |
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| Country | Link |
|---|---|
| CN (1) | CN214504520U (en) |
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2021
- 2021-04-22 CN CN202120831736.9U patent/CN214504520U/en active Active
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