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Narrow band carrier reduction device applied to low voltage collected meter reading

A technology of centralized meter reading and narrow-band carrier, applied in the direction of line transmission monitoring/testing, line transmission components, etc., can solve the problem that the carrier attenuation device cannot meet the detection of low-voltage centralized meter reading carrier attenuation communication performance, and achieve good electrical isolation. Features, easy expansion, long-term reliability and stable work effect

Active Publication Date: 2013-03-06
STATE GRID HUBEI ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] General-purpose carrier attenuation devices cannot meet the detection of carrier attenuation communication performance of low-voltage centralized meter reading

Method used

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  • Narrow band carrier reduction device applied to low voltage collected meter reading
  • Narrow band carrier reduction device applied to low voltage collected meter reading
  • Narrow band carrier reduction device applied to low voltage collected meter reading

Examples

Experimental program
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Embodiment Construction

[0040] Below in conjunction with accompanying drawing and embodiment describe in detail:

[0041] 1. Overall

[0042] Such as figure 1 , the present invention includes a carrier signal input terminal A of the device under test;

[0043] It is equipped with a PC host computer 10, a communication circuit 20, buttons 30, a control logic circuit 40, a first impedance matching circuit 50, a low-pass high-impedance filter circuit 60, a high-frequency attenuation circuit 70, a second impedance matching circuit 80 and a carrier signal output Terminal B;

[0044] Its connection relationship is as follows:

[0045] The PC host computer 10, the communication circuit 20, the control logic circuit 40 and the high-frequency attenuation circuit 70 are sequentially connected, and the button 30 is connected to the control logic circuit 40, and the switching of the attenuation range of the carrier signal is realized through program control;

[0046] The carrier signal input terminal A, the ...

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PUM

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Abstract

The invention discloses a narrow band carrier reduction device applied to low voltage collected meter reading, and relates to a carrier reduction device. The carrier reduction device structurally comprises a PC upper computer, a communication circuit, a control logic circuit and a high frequency attenuation circuit, which are connected in turn. Keys are connected with the control logic circuit, and the carrier signal attenuation amplitude is switched through program control. A carrier signal input end, a first impedance matching circuit, a low pass high resistance filter circuit, a second impedance matching circuit and a carrier signal output end are connected in turn. The carrier signal input end, the high frequency attenuation circuit and the carrier signal output end connected in turn realizes the attenuation of the input carrier signal. The narrow band carrier reduction device realizes the program controlled switchover of carrier gear, is easy to extend and works reliably and steadily in a long term. The device also realizes the attenuation on the same gear within the frequency ranging from 80kHZ to 1MHZ and is applied to a low voltage carrier collected meter reading terminal and the communication attenuation performance test of an intellectual carrier electric energy meter.

Description

technical field [0001] The invention relates to a carrier attenuation device, in particular to a narrowband carrier attenuation device applied to low-voltage centralized meter reading. Specifically, the present invention relates to the detection of the attenuation of the carrier signal of the electronic equipment, especially to the detection of the communication attenuation performance of the low-voltage carrier centralized meter reading terminal (including the concentrator and the collector) and the intelligent carrier electric energy meter. Background technique [0002] At present, the general-purpose carrier attenuation device can only attenuate a carrier in a certain frequency band, and cannot control the magnitude of carrier attenuation through a program, and the scalability is poor. [0003] The carrier communication chip used in the electric low-voltage centralized meter reading system, because different manufacturers have different carrier modulation frequency points...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B3/48
Inventor 夏水斌吴佳李帆李俊邓桂平汪司珂傅士冀陈俊李鹏宾
Owner STATE GRID HUBEI ELECTRIC POWER RES INST
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