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Noise absorption circuit, test method and electric meter

A technology for absorbing circuits and noise, applied in the fields of noise absorbing circuits, noise absorbing circuit testing methods and ammeters, which can solve problems such as chip damage, users’ inability to use electricity normally, and ammeter damage

Active Publication Date: 2020-04-21
SHENZHEN KAIFA TECH (CHENGDU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] If the meter equipped with a power carrier chip is installed in this environment, the chip or the meter may be damaged due to the noise in the power grid. This requires on-site personnel to update the module or meter, and the user cannot use electricity normally.

Method used

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  • Noise absorption circuit, test method and electric meter
  • Noise absorption circuit, test method and electric meter
  • Noise absorption circuit, test method and electric meter

Examples

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Embodiment Construction

[0038] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concepts of example embodiments to those skilled in the art.

[0039] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of the embodiments of the application. However, those skilled in the art will appreciate that the technical solutions of the present application may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be employed. In other instances, well-known methods,...

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PUM

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Abstract

The embodiment of the invention provides a noise absorption circuit. The noise absorption circuit comprises a first noise absorption module; a voltage division module, wherein one end of the voltage division module is grounded, the input end of the voltage division module is connected with the cathode of a second diode, and the output end of the voltage division module outputs control voltage. Thecircuit also comprises a second noise absorption module which comprises a DC / DC controller and a power resistor. The control end of the DC / DC controller is connected with the output end of the voltage division module, the input end of the DC / DC controller is connected with the cathode of the second diode, the output end of the DC / DC controller is connected with the power resistor, and the other end of the power resistor is grounded. The circuit further comprises a control module, wherein the input end of the control module is connected with the output end of the DC / DC controller, the output end of the control module is connected with the control end of a power line carrier module, the power line carrier module is controlled to be started or stopped through the control module, and the output end of the power line carrier module is connected with a power grid access end. Noise in a power grid is absorbed, and the power line carrier module is prevented from being damaged by the noise.

Description

technical field [0001] The present application relates to the technical field of electric power communication, in particular, to a noise absorbing circuit, a test method for the noise absorbing circuit, and an electric meter. Background technique [0002] The AMI networked meter reading technology in the intelligent network can be realized by the power line carrier (Power line Communication, PLC) technology. Specifically, by configuring a PLC circuit including a power carrier module in the electric meter, communication between the electric meter and the main station system can be realized by means of the power line in the power grid, for example, networked meter reading can be realized. The electric meter configured with the circuit carrier module can communicate with the main station system in the PLC frequency band through the circuit carrier mode. [0003] However, with the extensive application of PLC technology in the actual environment, the structure of the power grid...

Claims

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Application Information

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IPC IPC(8): H04B15/00H04B3/54H04B17/00G01R11/00
CPCG01R11/00H04B3/54H04B15/005H04B17/00
Inventor 孟令翔原凯阳
Owner SHENZHEN KAIFA TECH (CHENGDU) CO LTD