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Power line communication system and power line communication method

A technology of power line communication and communication signal, applied in the field of communication, to achieve the effect of large amount of data transmission, small loss and long transmission distance

Active Publication Date: 2016-12-21
CHANGXING TAIHU ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to propose a method of directly converting the power supply into a transmission signal according to the power line communication signal to fundamentally overcome the attenuation and distortion of the existing power line carrier communication for long-distance transmission in view of the above-mentioned shortcomings of the prior art. Power line communication system and method for the problem

Method used

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  • Power line communication system and power line communication method

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Experimental program
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Effect test

Embodiment 1

[0038] Please refer to figure 2 , image 3 , this application does not use the existing carrier communication method, but directly encodes and decodes the high-voltage power wave. The specific implementation process is as follows:

[0039] In this embodiment, the power line communication system includes a high-voltage variable-frequency coding module, and high-voltage power waves and PLC signals are input into the high-voltage variable-frequency coding module.

[0040] In this embodiment, the high-voltage power wave is 220V, 50Hz power wave, of course, it can also be a common 380V industrial power, or a high-voltage power wave that meets the transmission standards of other countries.

[0041] In this embodiment, the peak value of the PLC signal is 24V, of course, it can also be other common PLC signal peak values ​​such as 12V or 36V.

[0042] The PLC signal is generally a sine wave signal, and its frequency is generally different from that of the power wave. To this end, ...

Embodiment 2

[0062] The difference of this embodiment relative to embodiment 1 is:

[0063] In this embodiment, the remote device receives the induced current signal after receiving the frequency conversion coded power wave. The current value of the power wave signal with encoded high and low changes is converted to 1 when it is higher than the first preset value, and converted to 0 when it is lower than the second preset value, thereby forming a digital signal similar to 001110....

[0064] In this application, the encoded power wave not only has a higher voltage amplitude, but also has a higher current amplitude, which makes it possible to determine the digital signal by detecting the change of the current value in this embodiment. The voltage value in the prior art is only 24V, and the voltage value transmitted to the destination after loss is only about 14V, and the current value is even negligible. It is almost impossible to achieve the purpose of converting digital signals by detecti...

Embodiment 3

[0067] In this embodiment, the remote device not only senses the voltage signal but also the current signal after receiving the frequency conversion coded power wave.

[0068] As described in Embodiment 1 or Embodiment 2, if the amplitude of the power wave is above 70V, the voltage sensing module will convert it to 1, and if the amplitude of the power wave is below 50V, the voltage sensing module will convert it to 0. The wave signal is converted into a digital signal of 11001····. When the current value is higher than the first preset value, it is converted to 1, and when it is lower than the second preset value, it is converted to 0, thereby forming a digital signal similar to 001110.... The digital signal converted by the voltage sensing module is called the first dimension signal. The digital signal converted by the current sensing module is called the second dimension signal.

[0069] Both the first-dimension signal and the second-dimension signal can be inversely encod...

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Abstract

The invention discloses a power line communication system and a power line communication method. The power line communication system comprises a high voltage frequency conversion coding module, which is used for changing a power supply wave frequency according to a to-be-transmitted power line communication signal and for coding; a transmission module, which is used for transmitting the coded power supply wave; a digital-analog induction conversion module, which is used for detecting the voltage and / or the current value of the coded power supply wave, and is used for outputting a digital signal. The high voltage power supply wave is directly converted into the power supply wave provided with the power line communication signal, and the loss is small during the transmission, and the transmission distance is long.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a power line communication system and method. Background technique [0002] Power Line Communication (PLC) technology refers to a communication method that uses power lines to transmit data and media signals. Power line communication uses modulation technology to modulate user data when sending, loads high-frequency information on the current, and then transmits on the power line; at the receiving end, the modulated signal is first taken out through a filter, and then decoded By tuning, the original communication signal can be obtained, and the communication signal can be transmitted to a computer or telephone to realize information transmission. [0003] Traditional power line communication carries a small voltage signal (peak value 24V) to 220V, 50Hz AC through the carrier modulation module. The remote device separates the demodulation of small voltage signals f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/54
CPCH04B3/542
Inventor 何山
Owner CHANGXING TAIHU ELECTRIC CORP
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