CN213717971U - Power line carrier communication interference device - Google Patents
Power line carrier communication interference device Download PDFInfo
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- CN213717971U CN213717971U CN202022681512.2U CN202022681512U CN213717971U CN 213717971 U CN213717971 U CN 213717971U CN 202022681512 U CN202022681512 U CN 202022681512U CN 213717971 U CN213717971 U CN 213717971U
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Abstract
The utility model relates to a power line carrier communication interference unit belongs to electric power training trade and uses experimental technical field. The utility model comprises an MCU control circuit, a keyboard control circuit, a display circuit, a DDS chip, an amplifying circuit, a coupling output module and a power supply; the power supply is used for supplying power; the keyboard control circuit is connected with the MCU control circuit, the MCU control circuit is also respectively connected with the display circuit and the DDS chip, the amplifying circuit and the coupling output module are sequentially connected. The utility model discloses a research is significant to improving power line carrier communication quality and reliability. The research of the power line carrier communication interference needs a test module which can simulate the interference degree of different frequencies, amplitudes and phases output by a field interference source to the carrier communication quality, so as to research the measures for the interference of different interference sources to the carrier communication.
Description
Technical Field
The utility model relates to a power line carrier communication interference unit belongs to electric power training trade and uses experimental technical field.
Background
Power Line Communication (Power Line Communication) is a means for implementing data transmission and information exchange by using an existing low-voltage Power distribution network as a transmission medium. When the data is transmitted by using a power line communication mode, the transmitter firstly modulates the data onto a high-frequency carrier, and then couples the data onto a power line through a coupling circuit after power amplification. The peak-to-peak voltage of the signal frequency band does not exceed 10V generally, so that the power line is not influenced. The low-voltage power line network signal transmission device has the advantages that the signal transmission is carried out by depending on the distributed low-voltage power line network, no additional channel needs to be erected, the cost is low, the transmission rate is high, the low-voltage power line network signal transmission device is always online, the range is wide, the communication distance is long, and the like. The method is mainly applied to the aspects of automatic meter reading systems of water, gas, electric meters and the like, intelligent residential quarter home systems, distribution network automation, internet access and the like. However, there are some problems, mainly that the low-voltage power line channel has serious background noise interference and large time-varying attenuation, so that the power line carrier communication quality is reduced and the reliability is poor. Since the power line is not designed exclusively for transmitting signals, it is necessary to analyze the transmission characteristics of high-frequency signals in the power line. The main factors influencing the power line carrier transmission are the impedance characteristic, the attenuation characteristic and the noise interference of a power network, the impedance characteristic, the attenuation characteristic and the noise interference restrict the transmission distance of signals, and the noise interference determines the quality of data transmission. The research on the power line carrier communication interference has great significance for improving the power line carrier communication quality and reliability. The research of the power line carrier communication interference needs a test module which can simulate the interference degree of different frequencies, amplitudes and phases output by a field interference source to the carrier communication quality, so as to research the measures for the interference of different interference sources to the carrier communication.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: the utility model provides a power line carrier communication interference unit sets up interference wave frequency, range through the panel button, exports corresponding interference waveform, and the simulation power consumption scene causes the interference source of interference to carrier communication, influences the electric energy meter carrier communication and reads the success rate.
The utility model adopts the technical scheme that: a power line carrier communication interference device comprises an MCU control circuit, a keyboard control circuit, a display circuit, a DDS chip, an amplifying circuit, a coupling output module and a power supply;
the power supply is used for supplying power; the keyboard control circuit is connected with the MCU control circuit, the MCU control circuit is also respectively connected with the display circuit and the DDS chip, the amplifying circuit and the coupling output module are sequentially connected.
As a further aspect of the present invention, the MCU control circuit is configured to receive the output waveform setting information of the keyboard control circuit, send the setting information to the DDS chip, and send the setting information to the display circuit;
the keyboard control circuit is used for outputting frequency and amplitude information setting of interference waveforms;
the display circuit is used for displaying set frequency and amplitude information;
the DDS chip is used for outputting corresponding interference waveforms of frequency and amplitude according to frequency and amplitude information set by the keyboard control circuit;
the amplifying circuit is used for carrying out power amplification on the interference waveform output by the DDS chip;
and the coupling output module is used for coupling the interference waveform signal after power amplification to the power line to interfere the carrier communication signal of the electric meter.
The utility model has the advantages that: the main factors influencing the power line carrier transmission are impedance characteristics, attenuation characteristics and noise interference of a power network, the impedance characteristics, the attenuation characteristics and the noise interference restrict the transmission distance of signals, and the noise interference determines the quality of data transmission, so that the research on the power line carrier communication interference is significant for improving the power line carrier communication quality and reliability. The research of the power line carrier communication interference needs a test module which can simulate the interference degree of different frequencies, amplitudes and phases output by a field interference source to the carrier communication quality, so as to research the measures for the interference of different interference sources to the carrier communication.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a circuit diagram of the MCU control circuit of the present invention;
FIG. 3 is a circuit diagram of the DDS chip of the present invention;
fig. 4 is a schematic diagram of the application of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Example 1: a power line carrier communication interference device is shown in figure 1 and comprises an MCU control circuit, a keyboard control circuit, a display circuit, a DDS chip, an amplifying circuit, a coupling output module and a power supply; the power supply is used for supplying power; the keyboard control circuit is connected with the MCU control circuit, the MCU control circuit is also respectively connected with the display circuit and the DDS chip, the amplifying circuit and the coupling output module are sequentially connected. The MCU control circuit is used for receiving the output waveform setting information of the keyboard control circuit, sending the setting information to the DDS chip and sending the setting information to the display circuit; the keyboard control circuit is used for outputting frequency and amplitude information setting of interference waveforms; the display circuit is used for displaying set frequency and amplitude information; the DDS chip is used for outputting corresponding interference waveforms of frequency and amplitude according to frequency and amplitude information set by the keyboard control circuit; the amplifying circuit is used for carrying out power amplification on the interference waveform output by the DDS chip; and the coupling output module is used for coupling the interference waveform signal after power amplification to the power line to interfere the carrier communication signal of the electric meter.
The utility model discloses a MCU control circuit can adopt as shown in fig. 2 circuit, the utility model discloses a DDS chip can adopt as shown in fig. 3 circuit.
The utility model discloses can adopt when using as the access mode that fig. 4 shows, the subject is: 1 centralized meter reading terminal, 1 carrier electric energy meter and 1 carrier communication interference device;
when the meter is normally read, a manual meter reading function in a menu of the centralized meter reading terminal is clicked, the centralized meter reading terminal can normally read the electric energy data of the carrier electric energy meter, for example, after the meter is connected to the carrier communication interference device in the graph of fig. 4, the carrier communication interference device can set interference waveform output, the success rate of reading the electric energy meter by the carrier of the centralized meter reading terminal is checked by setting different frequencies and different amplitudes of the interference waveforms, so that the influence degree of the carrier interference waveforms with different frequencies and different amplitudes on the reading success rate is researched, and data support is provided for further researching the characteristics of carrier communication interference sources and controlling the carrier communication interference.
While the present invention has been particularly shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (2)
1. A power line carrier communication interference device is characterized in that: the device comprises an MCU control circuit, a keyboard control circuit, a display circuit, a DDS chip, an amplifying circuit, a coupling output module and a power supply;
the power supply is used for supplying power; the keyboard control circuit is connected with the MCU control circuit, the MCU control circuit is also respectively connected with the display circuit and the DDS chip, the amplifying circuit and the coupling output module are sequentially connected.
2. The interference apparatus for power line carrier communication according to claim 1, wherein: the MCU control circuit is used for receiving the output waveform setting information of the keyboard control circuit, sending the setting information to the DDS chip and sending the setting information to the display circuit;
the keyboard control circuit is used for outputting frequency and amplitude information setting of interference waveforms;
the display circuit is used for displaying set frequency and amplitude information;
the DDS chip is used for outputting corresponding interference waveforms of frequency and amplitude according to frequency and amplitude information set by the keyboard control circuit;
the amplifying circuit is used for carrying out power amplification on the interference waveform output by the DDS chip;
and the coupling output module is used for coupling the interference waveform signal after power amplification to the power line to interfere the carrier communication signal of the electric meter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020220345797 | 2020-09-16 | ||
| CN202022034579 | 2020-09-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213717971U true CN213717971U (en) | 2021-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022681512.2U Active CN213717971U (en) | 2020-09-16 | 2020-11-18 | Power line carrier communication interference device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213717971U (en) |
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2020
- 2020-11-18 CN CN202022681512.2U patent/CN213717971U/en active Active
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