Opening and closing switching method and device of filtering device of power line communication system

A power line communication and filtering device technology, which is applied in the field of communication transmission, can solve the problems of high power consumption, large instantaneous current of the filtering device, and low accuracy, and achieve the effect of improving stability and reducing power consumption

Active Publication Date: 2013-05-15
CHINA MOBILE GROUP SHAIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the equipment maintenance personnel judge whether there is an interference signal in the PLC system based on experience, and then manually open and close the filtering device. Because it relies too much on the subjective experience of the equipment maintenance personnel, the objectivity of interference signal detection is not enough. Strong, low accuracy, and, because the instantaneous current generated when the filter device is turned on or off is large, if it is turned on or off frequently, it will have a great impact on the stability of the PLC system
Moreover, if the filter device is always in working condition, it will also cause a large power consumption while affecting the service life of the filter device

Method used

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  • Opening and closing switching method and device of filtering device of power line communication system
  • Opening and closing switching method and device of filtering device of power line communication system
  • Opening and closing switching method and device of filtering device of power line communication system

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Embodiment 1

[0024] Such as figure 1 As shown, it is a flowchart of a switching method for a filter device in a power line communication system proposed in Embodiment 1 of the present invention, and the specific process is as follows:

[0025] Step 11, within a specified period of time, receive signals within the frequency range of 1.6MHZ to 30MHZ on the power line multiple times, wherein the received signals include communication signals and / or high-frequency electrical signals, and each received signal After frequency conversion processing, it is converted into a quantized signal. Wherein, the quantized signal may be, but not limited to, a sine wave signal of a single frequency, or a preselected wave signal light.

[0026] Step 12, obtain the setting parameter value in the quantized signal after each conversion, compare the obtained setting parameter value with the preset first threshold value, obtain multiple judgment results, and generate a corresponding judgment result corresponding ...

Embodiment 2

[0041] Further, as figure 2 As shown, Embodiment 2 of the present invention proposes a switching device for a filter device in a power line communication system based on the switching method for a filter device in a power line communication system proposed in the first embodiment above, including;

[0042] The signal receiver 201 is configured to receive signals in the power line communication frequency band multiple times within a specified time length, and convert each received signal into a quantized signal.

[0043] Wherein, the signal receiver 201 may be provided with an input circuit for receiving a high-frequency signal, a frequency mixing circuit for converting the received signal into a quantized signal, and an oscillating output circuit for outputting the converted quantized signal. The input circuit for receiving high-frequency signals can resist strong voltage of 220V / 380V. After the high-frequency signal is input through the input circuit, the frequency is shift...

Embodiment 3

[0056] Furthermore, Embodiment 3 of the present invention is based on the above-mentioned Embodiment 1 and Embodiment 2, and an air conditioner is separately installed on a certain road on the power distribution panel as an example, as shown in image 3 As shown, the switching device of the filter device in the power line communication system is installed on the power distribution panel in the power line communication system, and the electrical signals generated by other electrical equipment such as air conditioners and sockets need to pass through the power distribution panel installed on the power line communication system. Switching device for filtering device in power line communication system. Such as Figure 4 The flow chart of the method for switching the filter device in the power line communication system shown, the specific implementation process is as follows:

[0057] Step 41, use the signal receiver to pass through the internal input circuit for receiving high-fr...

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Abstract

The invention discloses an opening and closing switching method and a device of a filtering device of a power line communication system. The method comprises that signals of a power line communication frequency band are received repeatedly in set time length, the signals received by each time are converted to quantized signals; whether set parameter value in the quantized signals converted each time is larger than first threshold value or not is judged so as to obtain a plurality of judge results; among the obtained judge results, the relation between the frequency of the judge results which are 'yes' and the total frequency of the judge results is confirmed; instructions used for opening or closing the filtering device added to the power line communication system are generated according to the obtained relation; and the filtering device is opened or closed according to the generated instructions. According to the opening and closing switching method and the device of the filtering device of the power line communication system, the filtering device can be opened and closed automatically when the purpose that high-frequency electrical signal existing in a programmable logic controller (PLC) system can be confirmed accurately is achieved, stability of the PLC system is improved well, and power consumption of the filtering device is reduced.

Description

technical field [0001] The invention relates to the technical field of communication transmission, in particular to a switching method and device for a filter device in a power line communication system. Background technique [0002] Power line communication (PLC, Power Line Communication), also known as power line carrier communication, refers to the use of high-voltage power lines (usually refers to 35kV and above voltage levels in the field of power carrier), medium voltage power lines (usually refers to 10kV voltage level in the field of power carrier) Or low-voltage distribution lines (usually refer to 380 / 220V subscriber lines in the field of power carrier) as information transmission media, a special communication method for voice signal or data signal transmission, PLC uses 1.6M ~ 30M frequency band to transmit communication signals, according to The principle of frequency shifting and frequency division. At the sending end, the original communication signal is modul...

Claims

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Application Information

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IPC IPC(8): H04B3/06H04B3/46H04B3/54
Inventor陆展波
OwnerCHINA MOBILE GROUP SHAIHAI