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Direct-current ammeter with wide metering range

A DC current and range technology, applied in the meter field, can solve problems such as the insufficient measurement range of DC meters

Inactive Publication Date: 2020-10-13
ZHEJIANG REALLIN ELECTRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the measurement range of the DC meter in the prior art is not large enough, and provide a DC ammeter with a wide measurement range

Method used

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  • Direct-current ammeter with wide metering range
  • Direct-current ammeter with wide metering range
  • Direct-current ammeter with wide metering range

Examples

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Effect test

Embodiment

[0065] Embodiment: a kind of DC ammeter of wide measuring range, as figure 1 As shown, it includes a sampling element 1, a sampling information processing circuit 2 and a power supply circuit 3. The sampling information sending end of the sampling element used to transmit the collected information is connected to the sampling information processing circuit sampling information receiving end. The sampling information processing circuit 2 includes a metering chip 21, Anti-aliasing filter circuit 22, voltage dividing sampling circuit 23 and RC filter circuit 24 for collecting load and DC charging pile voltage signals, the input end of the anti-aliasing filter circuit serves as the sampling information receiving end of the sampling information processing circuit, and the output of the anti-aliasing filtering circuit connected to the receiving end of the current sampling signal of the metering chip, the output end of the voltage dividing sampling circuit 23 is connected to the input...

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PUM

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Abstract

The invention discloses a direct-current ammeter with a wide metering range. The direct-current ammeter comprises a sampling element and a sampling information processing circuit, a sampling information sending end of the sampling piece for transmitting the acquired information is connected with a sampling information receiving end of the sampling information processing circuit; the sampling information processing circuit comprises a metering chip, an anti-aliasing filter circuit and a voltage division sampling circuit for acquiring voltage signals of a load and a direct-current charging pile;the input end of the anti-aliasing filter circuit serves as the sampling information receiving end of the sampling information processing circuit, the output end of the anti-aliasing filter circuit is connected with the current sampling signal receiving end of the metering chip, and the output end of the voltage division sampling circuit is connected with the voltage signal receiving end of the metering chip. The invention provides a direct-current ammeter with a wide metering range.

Description

technical field [0001] The invention relates to the technical field of meters, in particular to a DC ammeter with a wide measurement range. Background technique [0002] At present, the range of the DC ammeter is difficult to measure and calculate due to the small signal, which leads to the inability to achieve very accurate small range, and the problem of heat dissipation of the DC meter, and the large range is not easy to increase. However, with the popularity of electric vehicles, DC charging piles will become more and more More and more, how to accurately measure electricity consumption is an important technical problem, which requires the appearance of a DC ammeter with a wide measurement range. [0003] Chinese Patent Publication No. CN110763910A, the publication date is February 07, 2020. The name of the invention is a digital display DC meter and its current sampling circuit. The application includes that the current sampling circuit includes a reference signal modul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00G01R15/14
CPCG01R15/14G01R35/005
Inventor 孟娟范建国
Owner ZHEJIANG REALLIN ELECTRON
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