Single-phase intelligent cost control electric energy meter based on IR46 label

Abstract

The invention discloses a single-phase intelligent cost control electric energy meter based on IR46 labeling, which comprises a shell, a light guide type liquid crystal display screen, a USB interface, an auxiliary wiring terminal strip and a main wiring terminal strip are arranged on the surface of the shell, and a metering core module, a management core module, a power supply module, a relay, a mutual inductor and an uplink communication module are arranged in the shell. A terminal temperature measuring element is arranged on the main wiring terminal strip in the shell; the power supply module is electrically connected with the metering core module and the management core module; and power supply isolation modules are arranged between the metering core module and the power supply module and between the management core module and the power supply module. The system has the advantages that the whole machine is composed of a metering core, a management core, an uplink communication module and other modules, and the design thought that the metering core module and the management core module are mutually independent is adopted; the on-site inspection frequency can be effectively reduced, and high economic benefits and social benefits are achieved; the intelligent power grid construction demand is responded, and the reliability and stability of electric power utilization are ensured.

Description

Technical Field:

[0001] The present invention relates to a single-phase intelligent fee-controlled electric energy meter based on IR46 marking in the field of electric energy metering. Background Art:

[0002] Intelligent electric energy meters are mainly used as metering devices. After ten years of promotion, they have successfully realized the transformation of power supply enterprises from manual meter reading to automated and intelligent meter reading, obtaining more detailed and accurate power consumption data; however, they do not yet have the characteristics of separating metering performance and management functions, high-resolution storage of big data, load identification, high-speed information processing, and communication; therefore, modular design based on the IR46 standard, GB / T17215.211, and GB / T17215.321, separating the hardware and software of the metering part and other parts, and enabling new functions to be flexibly configured with later-developed modules is the need for the development of the power market.

[0003] IR46: International Recommendation 46, the international recommendation for active energy meters. Summary of the Invention:

[0004] The purpose of the present invention is to provide a single-phase intelligent fee-controlled electric energy meter based on IR46 marking with the separation of the hardware and software of the metering part and other parts.

[0005] The present invention is implemented by the following technical solutions: A single-phase intelligent fee-controlled electric energy meter based on IR46 marking, which includes a housing. On the surface of the housing, there are a light-guided liquid crystal display screen, a USB interface, an auxiliary wiring terminal row, and a main wiring terminal row from top to bottom. Inside the housing, there are a metering core module, a management core module, a power supply module, a relay, a current transformer, and an uplink communication module. A terminal temperature measuring element is provided on the main wiring terminal row inside the housing; the power supply module is electrically connected to the metering core module and the management core module; power isolation modules are provided between the metering core module and the management core module and the power supply module; the metering unit of the metering core module is electrically connected to the current transformer, and the current transformer is electrically connected to the main wiring terminal row; the terminal temperature measuring element and the relay are both electrically connected to the metering core MCU of the metering core module. The terminal temperature measuring element transmits temperature information to the metering core MCU, and the metering core MCU controls the relay; the metering core MCU and the management core MCU of the management core module are connected by SPI communication, with the management core module as the master and the metering core module as the slave; the management core MCU is connected to the USB interface, and an expansion module is detachably plugged into the USB interface; the management core MCU is optically isolated and electrically connected to the auxiliary wiring terminal row; the uplink communication module is connected to the management core MCU by UATR communication.

[0006] Preferably, the metering core module includes the metering core MCU, the metering unit and the storage unit.

[0007] Preferably, the management core module includes the management core MCU and the Bluetooth communication module; the management core MCU is electrically connected to the light guide type liquid crystal display screen.

[0008] Preferably, a backup power supply electrically connected to the metering core MCU and a replaceable clock battery are provided in the housing, and the backup power supply is a peripheral power supply or a super capacitor.

[0009] Preferably, phase line input / output terminals and neutral line input / output terminals are provided on the main wiring terminal block; positive / negative pulse terminals, positive / negative multi-functional wiring terminals and 485 wiring terminals are provided on the auxiliary wiring terminal block; the terminals on the auxiliary wiring terminal block are connected by reed pieces.

[0010] Preferably, the expansion module includes a load identification module, an orderly charging module and a downlink module, all of which interact with the management core MCU in a serial port manner; among them, in addition to the general interface, the load identification module also communicates with the metering core MCU to obtain the original voltage, current and AD values of the metering core MCU, and the communication uses an SPI interface.

[0011] Preferably, the terminal temperature measuring element is a PN junction temperature sensor.

[0012] Advantages of the present invention: Compared with the prior art, the whole machine is composed of a metering core, a management core, an uplink communication module and other modules, and adopts the design idea of independent metering core module and management core module; the metering core module realizes the legal metering function and conducts data interaction with the management core module; the management core module realizes functions such as display, external communication, event recording, data freezing, load control, etc., and is a middleware connecting the metering core module and the expansion module; the software of the management core can be remotely upgraded, and can monitor metering performance and terminal temperature, effectively solving problems such as metering inaccuracy monitoring and power consumption safety; it can effectively reduce the on-site inspection frequency, and has high economic and social benefits; it responds to the needs of smart grid construction and ensures the reliability and stability of power consumption. Description of the drawings:

[0013] Figure 1 It is a schematic diagram of the panel of the present invention.

[0014] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0015] Figure 3 It is a schematic diagram of the main wiring terminal block.

[0016] Figure 4 It is a schematic diagram of the auxiliary wiring terminal block.

[0017] Figure 5 This is a schematic diagram of the hardware system connection of the present invention. Specific implementation manner:

[0018] Example:

[0019] Such as Figures 1 to 5As shown, a single-phase intelligent fee-controlled electric energy meter based on IR46 marking includes a housing 1. On the surface of the housing 1, there are a light-guided liquid crystal display screen 2, a USB interface, an auxiliary wiring terminal block 3, and a main wiring terminal block 4 from top to bottom. On the auxiliary wiring terminal block 3, there are positive and negative pulse terminals, positive and negative multi-functional wiring terminals, and 485 wiring terminals; the terminals on the auxiliary wiring terminal block 3 are connected by reed switches; on the main wiring terminal block 4, there are phase wire input and output terminals and neutral wire input and output terminals; inside the housing 1, there are a metering core module 5, a management core module 6, a power supply module 7, a relay 8, a current transformer 9, and an uplink communication module 10. The metering core module 5 includes a metering core MCU 51, a metering unit, and a storage unit; the management core module 6 includes a management core MCU 61 and a Bluetooth communication module 62. The management core MCU 61 is electrically connected to the light-guided liquid crystal display screen 2; the Bluetooth communication module 62 supports interconnection and interoperability, and its communication service follows the UUID standard protocol; the Bluetooth communication module 62 supports the two-master and three-slave working mode and supports concurrent data communication with 2 hosts and 3 slaves at the same time; when the Bluetooth communication module 62 communicates, the metering performance of the electric energy meter, the stored metering data, and parameters will not be affected or changed; the Bluetooth MAC address adopts the static address in the Bluetooth random address type and corresponds one-to-one with the communication address of the electric energy meter. The Bluetooth of the electric energy meter has strong anti-interference ability and good compatibility; the power supply module is electrically connected to the metering core module and the management core module; there are power isolation modules between the metering core module 5 and the management core module 6 and the power supply module 7; the metering unit of the metering core module 5 is electrically connected to the current transformer, and the current transformer 9 is electrically connected to the main wiring terminal block 4; on the main wiring terminal block 4 inside the housing, there is a terminal temperature measuring element 11. The terminal temperature measuring element 11 is a PN junction temperature sensor, with a temperature measurement range of +25°C to +150°C and a temperature measurement error not exceeding ±5°C; the time interval between two temperature measurements of any wiring terminal does not exceed 5s; the terminal temperature measuring element 11 and the relay 8 are both electrically connected to the metering core MCU 51, and the terminal temperature measuring element 11 transmits the temperature information to the metering core MCU 51; the metering core MCU 51 controls the relay 8; the metering core MCU 51 and the management core MCU 61 are connected by SPI communication, with the management core module as the master and the metering core module as the slave; the management core MCU 61 is connected to the USB interface, and an expansion module 12 is detachably plugged into the USB interface; the expansion module 12 includes a load identification module, an orderly charging module, and a downlink module, all of which interact with the management core MCU in a serial port manner; among them, in addition to the general interface, the load identification module also communicates with the metering core MCU to obtain the original voltage, current, and AD values of the metering core MCU, and the communication uses the SPI interface; the management core MCU 61 is optically isolated and electrically connected to the auxiliary wiring terminal block 3; the uplink communication module 10 is connected to the management core MCU 61 by UATR communication. The uplink communication module 10 is mainly used for data communication of the electric energy meter and supports communication methods such as carrier wave and micro-power wireless.The uplink communication module 10 and the management core MCU 61 adopt a serial port full-duplex communication mode. The communication rate is default 9600bps and can support up to 115200bps at most. The uplink communication module 10 is built-in with an energy storage device and can complete the active reporting of power outage within 3 minutes; in the housing 1, there is a backup power supply 13 and a replaceable clock battery 14 electrically connected to the metering core MCU 51. The backup power supply 13 is an external power supply or a super capacitor. The backup power supply enables the energy meter to continue working for several minutes after a power outage to report the power outage event and prepare for shutdown; the clock battery ensures that the clock of the energy meter can still provide the correct time after a long-term power outage.

Claims

1. Single-phase intelligent fee-controlled electric energy meter based on IR46 marking, Characterized in that, It includes a housing, on the surface of the housing, there are a light-guided liquid crystal display screen, a USB interface, an auxiliary wiring terminal row, and a main wiring terminal row from top to bottom. Inside the housing, there are a metering core module, a management core module, a power supply module, a relay, a transformer, and an upstream communication module. On the main wiring terminal row inside the housing, there is a terminal temperature measurement element; the power supply module is electrically connected to the metering core module and the management core module; between the metering core module and the management core module and the power supply module, there are power isolation modules; the metering unit of the metering core module is electrically connected to the transformer, and the transformer is electrically connected to the main wiring terminal row; the terminal temperature measurement element and the relay are both electrically connected to the metering core MCU of the metering core module. The terminal temperature measurement element transmits temperature information to the metering core MCU, and the metering core MCU controls the relay; the metering core MCU and the management core MCU of the management core module are connected by SPI communication; the management core MCU is connected to the USB interface, and an expansion module is detachably plugged on the USB interface; the management core MCU is optically isolated and electrically connected to the auxiliary wiring terminal row; the upstream communication module and the management core MCU are connected by UATR communication.

2. The single-phase intelligent fee-controlled electric energy meter based on IR46 marking according to claim 1, Characterized in that, The metering core module includes the metering core MCU, the metering unit, and a storage unit.

3. The single-phase intelligent fee-controlled electric energy meter based on IR46 marking according to claim 1, Characterized in that, The management core module includes the management core MCU and a Bluetooth communication module; the management core MCU is electrically connected to the light-guided liquid crystal display screen.

4. The single-phase intelligent fee-controlled electric energy meter based on IR46 marking according to claim 1, Characterized in that, Inside the housing, there is a backup power supply and a replaceable clock battery electrically connected to the metering core MCU. The backup power supply is an external power supply or a super capacitor.

5. The single-phase intelligent fee-controlled electric energy meter based on IR46 marking according to claim 1, Characterized in that, On the main wiring terminal row, there are phase wire input and output terminals and neutral wire input and output terminals; on the auxiliary wiring terminal row, there are positive and negative pulse terminals, positive and negative multi-functional wiring terminals, and 485 wiring terminals; the terminals on the auxiliary wiring terminal row are connected by reed switches.

6. The single-phase intelligent fee-controlled electric energy meter based on IR46 marking according to claim 1, Characterized in that, The expansion module includes a load identification module, an orderly charging module, and a downstream module, all of which interact with the management core MCU in a serial port manner; among them, in addition to the general interface, the load identification module also communicates with the metering core MCU to obtain the original voltage, current, and AD values of the metering core MCU, and the communication uses an SPI interface.

7. The single-phase intelligent fee-controlled electric energy meter based on IR46 marking according to claim 1, Characterized in that, The terminal temperature measuring element is a PN junction temperature sensor.

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