Three-phase electric energy meter

Abstract

The utility model relates to the technical field of instruments and meters, and discloses a three-phase electric energy meter, comprising a sampling module used for collecting voltage and current of a three-phase power supply line; the metering module calculates electric energy data based on the voltage and current of the three-phase power supply line; the control module processes the electric energy data so as to control the on-off state of the relay module, and transmits the processed electric energy data to a far end through the dual-mode communication module; when the power supply is judged to be abnormal based on the voltage and current of the three-phase power supply line, the relay module is controlled to cut off the three-phase power supply line; the dual-mode communication module is used for realizing information transmission between the control module and a far end; when carrier communication is interfered, the electric energy data is sent to a far end through wireless communication, so that the reliability and stability of communication data are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of instruments and meters, in particular to a three-phase electric energy meter. Background Art

[0002] Currently, the existing smart energy meters have the functions of energy measurement, data processing, real-time monitoring, remote control, information exchange, etc., and are suitable for electricity measurement in households, factories, mines, and industries. However, the existing three-phase smart energy meters do not have dual-mode communication functions. When the carrier communication is interfered and the communication fails, the communication data cannot be obtained. Utility Model Content

[0003] In view of this, the utility model provides a three-phase electric energy meter to solve the problem of the three-phase electric energy meter when the carrier communication is disturbed.

[0004] The utility model provides a three-phase electric energy meter, comprising: a relay module, a sampling module, a metering module, a control module, and a dual-mode communication module, wherein the relay module is connected in series to a three-phase power supply line; the sampling module is connected in series to the three-phase power supply line and is used to collect the voltage and current of the three-phase power supply line; the metering module, whose input end is connected to the output end of the sampling module, and whose output end is connected to the input end of the control module, is used to calculate electric energy data based on the voltage and current of the three-phase power supply line; the control module, whose output end is connected to the control end of the relay module and the input end of the dual-mode communication module, is used to process the electric energy data to control the on-off state of the relay module, and transmit the processed electric energy data to a remote end through the dual-mode communication module; when it determines that the power supply is abnormal based on the voltage and current of the three-phase power supply line, it controls the relay module to cut off the three-phase power supply line; the dual-mode communication module, whose output end is connected to the remote end in a carrier and wireless manner, is used to realize information transmission between the control module and the remote end; when the carrier communication is disturbed, the electric energy data is sent to the remote end through wireless communication.

[0005] The utility model arranges a dual-mode communication module in a three-phase electric energy meter. The module has two communication modes: carrier communication and wireless communication. When the carrier communication is disturbed, the electric energy data is sent to a remote end via wireless communication, thereby ensuring the reliability and stability of the communication data.

[0006] In an optional implementation, the three-phase electric energy meter further includes: a power supply module, which draws energy from a three-phase power supply line, and whose output end is connected to the power supply end of the control module, and is used to power the control module.

[0007] In an optional embodiment, the three-phase electricity meter also includes: a pulse alarm indication module, which is connected to the control module and is used to control the control module to send out a pulse signal and an alarm signal when the control module determines that the power supply is abnormal based on the voltage and current of the three-phase power supply line.

[0008] In an optional implementation, the three-phase electric energy meter further includes: an LCD display module, an input end of which is connected to the output end of the control module, and is used to display electric energy data.

[0009] In an optional implementation, the three-phase electric energy meter further includes: an RS485 communication module, whose input end is connected to the output end of the control module, and whose output end is connected to the remote end, and is used to realize information transmission between the control module and the remote end.

[0010] In an optional implementation, the three-phase energy meter further includes: an infrared communication module, whose input end is connected to the output end of the control module, and whose output end is connected to a handheld computer, and is used to realize information transmission between the control module and the handheld computer.

[0011] In an optional implementation, the three-phase electric energy meter further includes: an EEPROM memory connected to the output end of the control module and used to store electric energy data.

[0012] In an optional embodiment, the three-phase electricity meter also includes: a power outage data storage battery, which is connected to the power supply end of the control module and is used to power the control module when the three-phase power supply circuit is powered off, so that the control module can save the power outage data in time.

[0013] In an optional implementation, the three-phase energy meter further includes: a smart card module, which is connected to the control module and is used to realize the transmission of data and control signals between the smart card and the control module when the smart card is inserted into its interface.

[0014] In an optional implementation, the three-phase electric energy meter further includes: an ESAM security module, which is connected to the control module and the remote end, and is used to implement security authentication of the electric energy meter and storage of key data. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a composition diagram of a three-phase electric energy meter according to an embodiment of the utility model;

[0017] Figure 2 is a specific circuit structure diagram of a relay module according to an embodiment of the utility model;

[0018] FIG. 3( a ) and FIG. 3( b ) are specific circuit structure diagrams of a metering module according to an embodiment of the present utility model;

[0019] FIG. 4( a) and FIG. 4( b) are specific circuit structure diagrams of a control module according to an embodiment of the present utility model;

[0020] FIG. 5( a ) and FIG. 5( b ) are specific circuit structure diagrams of a dual-mode communication module according to an embodiment of the present utility model;

[0021] Figure 6 is a composition diagram of another three-phase electric energy meter according to an embodiment of the utility model;

[0022] Figure 7 is a specific circuit structure diagram of a power module according to an embodiment of the utility model;

[0023] FIG8(a) and FIG8(b) are specific circuit structure diagrams of an LCD display module according to an embodiment of the present utility model;

[0024] Fig. 9 It is a specific circuit structure diagram of the RS485 communication module according to an embodiment of the utility model;

[0025] Fig.10 It is a specific circuit structure diagram of the infrared communication module according to an embodiment of the utility model;

[0026] Fig.11 It is a specific circuit structure diagram of the EEPROM memory according to an embodiment of the utility model;

[0027] Figure 12(a) to Figure 12(c) is a specific circuit structure diagram of a smart card module according to an embodiment of the utility model;

[0028] Fig.13 It is a specific circuit structure diagram of the ESAM security module according to an embodiment of the utility model. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0030] In this embodiment, a three-phase electric energy meter is provided. Figure 1 As shown, it includes: a relay module 1, a sampling module 2, a metering module 3, a control module 4, and a dual-mode communication module 5.

[0031] Specifically, a relay module 1 is connected in series to a three-phase power supply line; a sampling module 2 is connected in series to the three-phase power supply line, and is used to collect the voltage and current of the three-phase power supply line; a metering module 3, whose input end is connected to the output end of the sampling module 2, and whose output end is connected to the input end of the control module 4, is used to calculate electric energy data based on the voltage and current of the three-phase power supply line.

[0032] Specifically, the relay module 1 is connected in series to the three-phase power supply line, which is controlled by the control module 4, but the remote end can also directly control the on-off state of the relay module 1. Optionally, the specific circuit structure of the relay module 1 is as follows Figure 2 When the power supply is abnormal, the relay is controlled to lose power, thereby cutting off the power supply line to the household.

[0033] Specifically, the ABC phase and N phase inlet and outlet ports are arranged on the electric energy meter body, and the sampling module 2 includes a three-phase current sampling circuit and a three-phase voltage sampling circuit. The sampling module 2 adopts a zero-sequence current detection circuit.

[0034] Specifically, the metering module 3 has the specific structure and functions of the mature metering module 3 in the prior art, for example, the metering module 3 can independently save the quantity, calculate the electric energy data, etc., which will not be repeated here. Optionally, the specific circuit structure diagram of the metering module 3 is shown in Figure 3 (a) and Figure 3 (b). In Figure 3 (a), IAP, IAN, IBP, IBN, ICP, ICN are connected to the sampling current, and in Figure 3 (b), VAP, VBP, VCP are included in the sampling voltage.

[0035] Specifically, the control module 4, whose output end is connected to the control end of the relay module 1 and the input end of the dual-mode communication module 5, is used to process the electric energy data to control the on and off state of the relay module 1, and transmit the processed electric energy data to the remote end through the dual-mode communication module 5; when it determines that the power supply is abnormal based on the voltage and current of the three-phase power supply line, it controls the relay module 1 to cut off the three-phase power supply line.

[0036] Specifically, the control module 4 includes an MCU chip, which has the same functions as the MCU in the mature electric energy meter in the prior art, and will not be described in detail here. Optionally, the specific circuit structure of the control module 4 is shown in Figures 4(a) and 4(b). The chip in Figure 4(a) is the MCU, and Figure 4(b) is the interface part of the MCU.

[0037] Specifically, the dual-mode communication module 5, whose output end is connected to the remote end by carrier and wireless means, is used to realize information transmission between the control module 4 and the remote end; when the carrier communication is disturbed, the power data is sent to the remote end by wireless communication.

[0038] Specifically, the dual-mode communication module 5 is a new type of communication technology module, which is mainly used in the field of mobile communications. The module adopts LTE and WiFi dual-mode fusion technology, which can simultaneously support two communication methods in different frequency bands to achieve high-speed and stable data transmission. At the same time, the module also supports a variety of communication protocols, such as TCP / IP, UDP, etc., with good compatibility. The design of this technical module adopts advanced chip solutions and optimized circuit layout, so that it has excellent performance and stability. This module is widely used in mobile communication terminals, smart homes, the Internet of Things and other fields, providing users with more efficient and convenient communication services. In this embodiment, the dual-mode communication module 5 is applied to the electric energy meter, so that when the carrier communication is interfered, the wireless communication method is used to communicate with the remote end to ensure the reliability and stability of the communication data.

[0039] Optionally, the specific circuit structure diagram of the carrier and wireless dual-mode interface is shown in Figure 5 (a) and Figure 5 (b). The interface adopts a photoelectric isolation method to perform communication isolation.

[0040] In some optional embodiments, such as Figure 6 As shown, the three-phase electric energy meter also includes: a power supply module 6, which draws energy from the three-phase power supply line, and whose output end is connected to the power supply end of the control module 4, and is used to supply power to the control module 4.

[0041] Specifically, the power module 6 includes a three-phase power input circuit and a rectifier, filter and voltage regulator circuit, wherein the three-phase power input circuit takes power from the three-phase power supply line and transmits the power to the rectifier, filter and voltage regulator circuit, and the rectifier, filter and voltage regulator circuit converts the three-phase alternating current into direct current and stabilizes the voltage to supply power to the control module 4. Optionally, the circuit structure of the power module 6 is as follows: Figure 7 shown.

[0042] In some optional embodiments, such as Figure 6 As shown, the three-phase energy meter also includes: a pulse alarm indication module 7, which is connected to the control module 4 and is used to control the control module 4 to send out a pulse signal and an alarm signal when the control module 4 determines that the power supply is abnormal based on the voltage and current of the three-phase power supply line.

[0043] Specifically, the pulse alarm indication module 7 includes a pulse indication and an alarm indication. The pulse indication not only indicates the normal operation of the electric meter, but also indicates the calibration of the meter during calibration. The alarm indication is used to send a calibration signal when the electric energy meter is abnormal. Optionally, the pulse indication uses a light emitting diode.

[0044] In some optional embodiments, such as Figure 6 As shown, the three-phase electric energy meter further includes: an LCD display module 8, whose input end is connected to the output end of the control module 4, and which is used to display electric energy data.

[0045] Specifically, the LCD display module 8 can display electric energy data, which is not limited to power consumption, recharge amount, etc. Optionally, the specific circuit structure of the LCD display module 8 is shown in Figure 8 (a) and Figure 8 (b).

[0046] In some optional embodiments, such as Figure 6 As shown, the three-phase electric energy meter also includes: an RS485 communication module 9, whose input end is connected to the output end of the control module 4, and whose output end is connected to the remote end, and is used to realize information transmission between the control module 4 and the remote end. Optionally, the specific circuit structure of the RS485 communication module 9 is as follows Fig. 9 shown.

[0047] In some optional embodiments, such as Figure 6 As shown, the three-phase electric energy meter also includes: an infrared communication module 10, whose input end is connected to the output end of the control module 4, and whose output end is connected to the palm computer, and is used to realize information transmission between the control module 4 and the palm computer. Optionally, the specific circuit structure of the infrared communication module 10 is as follows Fig.10 shown.

[0048] In some optional embodiments, such as Figure 6 As shown, the three-phase electric energy meter also includes: an EEPROM memory 11, which is connected to the output end of the control module 4 and is used to store electric energy data. Optionally, the specific circuit structure of the EEPROM memory 11 is as follows Fig.11 shown.

[0049] In some optional embodiments, such as Figure 6 As shown, the three-phase energy meter also includes: a power outage data storage battery 12, which is connected to the power supply end of the control module 4 and is used to supply power to the control module 4 when the three-phase power supply circuit is powered off, so that the control module 4 can save the power outage data in time.

[0050] In some optional implementations, the three-phase energy meter further includes: a smart card module, which is connected to the control module 4 and is used to realize the transmission of data and control signals between the smart card and the control module 4 when the smart card is inserted into its interface. Optionally, the specific circuit structure of the smart card module is as follows: Figure 12(a) to Figure 12(c) shown.

[0051] In some optional implementations, the three-phase electric energy meter further includes: an ESAM security module, which is remotely connected to the control module 4 and is used to implement security authentication of the electric energy meter and storage of key data. Optionally, the specific circuit structure of the ESAM security module is as follows: Fig.13 shown.

[0052] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A three-phase electric energy meter, characterized in that: include: Relay module, sampling module, metering module, control module, dual-mode communication module, among which, A relay module is connected in series to a three-phase power supply circuit; A sampling module is connected in series to the three-phase power supply line and is used to collect the voltage and current of the three-phase power supply line; A metering module, whose input end is connected to the output end of the sampling module, and whose output end is connected to the input end of the control module, and which is used to calculate electric energy data based on the voltage and current of the three-phase power supply line; A control module, whose output end is connected to the control end of the relay module and the input end of the dual-mode communication module, and is used to process the electric energy data to control the on / off state of the relay module, and transmit the processed electric energy data to a remote end through the dual-mode communication module; when it determines that the power supply is abnormal based on the voltage and current of the three-phase power supply line, it controls the relay module to cut off the three-phase power supply line; The dual-mode communication module has an output end connected to the remote end by carrier and wireless mode, and is used to realize information transmission between the control module and the remote end; when the carrier communication is interfered, the power data is sent to the remote end by wireless communication.

2. The three-phase electric energy meter according to claim 1, characterized in that: Also includes: A power supply module draws energy from a three-phase power supply line, and an output end thereof is connected to a power supply end of the control module, and is used to supply power to the control module.

3. The three-phase electric energy meter according to claim 1, characterized in that: Also includes: A pulse alarm indication module is connected to the control module and is used to control the control module to send out a pulse signal and an alarm signal when the control module determines that the power supply is abnormal based on the voltage and current of the three-phase power supply line.

4. The three-phase electric energy meter according to claim 1, characterized in that: Also includes: An LCD display module, whose input end is connected to the output end of the control module, is used to display the electric energy data.

5. The three-phase electric energy meter according to claim 1, characterized in that: Also includes: The RS485 communication module has an input end connected to the output end of the control module and an output end connected to a remote end, and is used to realize information transmission between the control module and the remote end.

6. The three-phase electric energy meter according to claim 1, characterized in that: Also includes: The infrared communication module has an input end connected to the output end of the control module and an output end connected to a palmtop computer, and is used to realize information transmission between the control module and the palmtop computer.

7. The three-phase electric energy meter according to claim 1, characterized in that: Also includes: An EEPROM memory is connected to the output end of the control module and is used to store the electric energy data.

8. The three-phase electric energy meter according to claim 1, characterized in that: Also includes: A power outage data storage battery is connected to the power supply end of the control module and is used to supply power to the control module when the three-phase power supply line is powered off, so that the control module can save the power outage data in time.

9. The three-phase electric energy meter according to claim 1, characterized in that: Also includes: The smart card module is connected to the control module and is used to realize the transmission of data and control signals between the smart card and the control module when the smart card is inserted into its interface.

10. The three-phase electric energy meter according to claim 1, characterized in that: Also includes: The ESAM security module is connected to the control module and the remote end, and is used to realize the security authentication of the electric energy meter and the storage of key data.

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