Single-phase remote-cost control intelligent ammeter with RS485 control signal output

A technology of RS485 and smart electric energy meter, which is applied in the field of intelligent electric energy meter, can solve the problem that the control of different states cannot be switched

Inactive Publication Date: 2013-01-30
NANJING NENGRUI AUTOMATION EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing single-phase remote cost-controlled smart energy meter cannot control more than one switch in different states, thereby providing a single-phase remote cost-controlled smart power meter with RS485 control signal output

Method used

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  • Single-phase remote-cost control intelligent ammeter with RS485 control signal output
  • Single-phase remote-cost control intelligent ammeter with RS485 control signal output

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specific Embodiment approach 1

[0009] Specific implementation mode one, combination figure 1 with figure 2 In this specific embodiment, a single-phase remote charge control smart electric energy meter with RS485 control signal output includes a metering circuit 2, a processing circuit 3, and an interface circuit 4. One of the signal output or input terminal of the metering circuit 2 and the processing circuit 3 The signal input or output terminal is connected, and the signal input or output terminal of the processing circuit 3 is connected to the signal output or input terminal of the interface circuit 4;

[0010] The metering circuit 2 includes a voltage sampling circuit 23, a first current sampling circuit 24, a second current sampling circuit 25, a metering unit 22, and a pulse output unit 21. The voltage sampling circuit 23 is used to collect the voltage of the live wire, and the first current sampling circuit 24 is used to collect the current passing through the live wire, the second current sampling cir...

specific Embodiment approach 2

[0021] Specific embodiment two, the difference between this specific embodiment and the single-phase remote fee-controlled smart electric energy meter with RS485 control signal output described in specific embodiment one is that the processing circuit 3 includes an MCU 31, a storage unit 32, a real-time clock unit 33 and The data encryption / decryption unit 34, the storage unit 32 is used to store data, the real-time clock unit 33 is used to provide a real-time clock signal, and the data encryption / decryption unit 34 is used to perform encryption / decryption processing on the data.

[0022] The processing circuit in this embodiment includes:

[0023] (1) Data processing

[0024] The microprocessor of the data processing part adopts the model NEC 78K0_Kx2 series microprocessor uPD78F0525A, which has the following basic characteristics: ①60k Flash storage capacity, 1k high-speed RAM, 2k extended RAM; ②The shortest instruction execution time can be Change between high speed (0.1s: the op...

specific Embodiment approach 3

[0031] Embodiment 3 The difference between this embodiment and the single-phase remote charge control smart electric energy meter with RS485 control signal output described in Embodiment 1 or 2 is that the interface circuit 4 also includes an infrared communication unit 44. The communication unit 44 is used to implement infrared communication between the processing circuit 3 and the user.

[0032] In this embodiment, the infrared uses a modulation type with a carrier wave of 38k.

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Abstract

The invention provides a single-phase remote-cost control intelligent ammeter with RS485 control signal output, and relates to an intelligent ammeter, aiming a solving the problem that the existing single-phase remote-cost control intelligent ammeter can not control different states of more than one switch. A signal output or input end of a metering circuit of the single-phase remote-cost control intelligent ammeter is connected with a No.1 signal input or output end of a processing circuit, and a No.2 signal input or output end of the processing circuit is connected with a signal output or input end of an interface circuit. According to the single-phase remote-cost control intelligent ammeter, the communication with various modes can be realized, an R485 communication interface not only can be used for setting local parameters, reading the data of the ammeter, and outputting a control signal, to control the power off or power on of an intelligent household electrical appliance or an intelligent socket, so that the different states of more than one switch can be controlled. The single-phase remote-cost control intelligent ammeter is suitable for the occasion where the electric energy needs to be metered and intelligently controlled.

Description

Technical field [0001] The invention relates to an intelligent electric energy meter, in particular to a single-phase remote charge control intelligent electric energy meter. Background technique [0002] In order to implement the development plan for building a "strong smart grid", the State Grid Corporation of China issued relevant standards for single-phase smart meters (Q / GDW354-2009, Q / GDW355-2009, Q / GDW364-2009, Q / GDW365-2009), and started a centralized bidding of smart meters in 2010. The functional requirements for single-phase smart meters in the above standards include: time-sharing forward and reverse active power metering, operating parameter measurement, data freezing storage, prepaid control, event recording and alarm, local display operation, remote power-off function, and previous The common electronic single-phase electric energy meter has made great progress. However, with the continuous advancement of the integration of smart grids and the Internet of Things...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R11/57
Inventor 周一心刘国鹏孙金良俞建华孙益兵李定胜屈战夏玉宝
Owner NANJING NENGRUI AUTOMATION EQUIP
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