Metering circuit for multichannel AC digital electric energy meter

A digital electric energy meter and measurement circuit technology, applied in the measurement of electrical variables, measurement devices, instruments, etc., can solve the problems of low acquisition and measurement accuracy, and the inability of smart meters to voltage and current data, so as to improve measurement accuracy and power conversion. efficiency and improve power supply stability

Inactive Publication Date: 2017-03-15
山东金洲科瑞节能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the smart meter contains multiple electric energy measurement modules. The existing multi-circuit electric energy meter adopts time-div

Method used

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  • Metering circuit for multichannel AC digital electric energy meter
  • Metering circuit for multichannel AC digital electric energy meter
  • Metering circuit for multichannel AC digital electric energy meter

Examples

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Embodiment Construction

[0046] Such as figure 1 As shown, a metering circuit applied to a multi-channel AC digital watt-hour meter, the input end is connected to the circuit to be tested, the output end is connected to the data input end of the main control chip, the control end is connected to the chip selection terminal of the main control chip, and Power supply module connection, including 12-channel voltage acquisition unit, 12-channel current acquisition unit and four metering chips. The current signal of the loop to be tested is connected to the input end of each metering chip with the output end of the three-way voltage acquisition unit and the output end of the three-way current acquisition unit respectively.

[0047] Such as figure 2 As shown, the voltage acquisition unit includes a voltage transformer, the input terminal of the voltage transformer is connected to a circuit to be tested, one output terminal of the voltage transformer is connected to the resistor R127 and grounded, and the ...

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PUM

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Abstract

The invention discloses a metering circuit for a multichannel AC digital electric energy meter. The metering circuit for a multichannel AC digital electric energy meter is characterized in that an input terminal is connected with a loop to be measured; an output terminal is connected with a data input terminal of a main control chip; a control terminal is connected with a chip selection terminal of the main control chip, is connected with a power supply module, and includes a 12-channel voltage acquisition unit, a 12-channel current acquisition unit and four metering chips; the 12-channel voltage acquisition unit acquires the voltage signals of a 12-channel loop to be measured; the 12-channel current acquisition unit acquires the current signals of the 12-channel loop to be measured; and the input terminal of each metering chip is respectively connected with the output terminal of a three-channel voltage acquisition unit and the output terminal of a three-channel current acquisition unit. The metering circuit for a multichannel AC digital electric energy meter overcomes the defect of time sharing metering of an existing multi-loop electric energy meter, so that the measuring accuracy is greatly improved; the active power achieves 0.1S; and the reactive power achieves 0.2S.

Description

technical field [0001] The invention relates to a digital electric meter, in particular to a metering circuit applied to a multi-channel AC digital electric energy meter. Background technique [0002] In the prior art, the smart meter contains multiple electric energy measurement modules. The existing multi-circuit electric energy meter adopts time-division multiplexing technology, and the measurement accuracy is not high. As a result, the smart meter cannot perform normal voltage and current data collection. Contents of the invention [0003] The purpose of the present invention is to provide a metering circuit applied to a multi-channel AC digital electric energy meter, the input end is connected to the circuit to be tested, the output end is connected to the data input end of the main control chip, and the control end is connected to the chip selection terminal of the main control chip Connection, connected with the power module, including twelve-way voltage acquisitio...

Claims

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Application Information

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IPC IPC(8): G01R22/10
CPCG01R22/10
Inventor 李钢
Owner 山东金洲科瑞节能科技有限公司
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