Power line information monitoring method and monitoring device thereof

A power line and power communication technology, applied in the field of power line information monitoring, can solve the problem of leaking useful information

Active Publication Date: 2014-02-05
成都立鑫新技术科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Third, computer information radiates th...

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  • Power line information monitoring method and monitoring device thereof

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Embodiment 1

[0052] A power line information monitoring method, comprising the steps of:

[0053] a. When there is power carrier communication information transmission on the power communication line, receive the power carrier communication information, and perform electronic tuning processing and A / D conversion;

[0054] b. Filter and digitally convert the digital signal after A / D conversion;

[0055] c. Perform modeling calculation on the processed signal to restore the digital baseband signal, extract related features from the baseband signal, and judge whether there is communication behavior on the power communication line according to the extracted related features.

[0056] In the step a, the coupling circuit receives the narrowband and broadband power carrier communication information on the power communication line, and sends it to the analog-to-digital converter for A / D conversion.

[0057] In the step b, the digital signal after A / D conversion is sent to the FPGA, and the FPGA f...

Embodiment 2

[0084] A power line information monitoring device, comprising a receiving electromagnetic coupler, an analog-to-digital converter ADC, a programmable gate array FPGA, a microprocessor DSP and a display, the receiving electromagnetic coupler receives communication information on the power line and sends it to the analog-to-digital conversion ADC, the analog-to-digital converter ADC A / D converts the communication information and sends it to the programmable gate array FPGA, and the field programmable gate array FPGA filters and digitally converts the received communication information and sends it to the microprocessor DSP. Microprocessor DSP judges whether there is communication behavior.

[0085] The programmable gate array FPGA is composed of a digital filter processor and a baseband processor, and the digital filter processor filters the received communication information and sends it to the baseband processor, and the baseband processor performs digital frequency conversion ...

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Abstract

The invention discloses a power line information monitoring method and monitoring device. The method includes the following steps that a, when transmitted in an electric power communication line, power line carrier communication information is received, and electronic tuning processing and A/D conversion are carried out on the power line carrier communication information; b, smoothing and digital frequency conversion processing are carried out on digital signals after A/D conversion; c, modeling is conducted on processed signals to restore digital baseband signals, relevant characteristics of the digital baseband signals are extracted, and whether communication behaviors exist in the electric power communication line or not is judged according to the extracted relevant characteristics. According to the method and device, information processing equipment can be monitored, the information can be transmitted through a power line, abnormal communication can be timely found out, and the situation that the equipment is attacked by pre-buried information combs due to password divulging or loss of important information is prevented.

Description

technical field [0001] The invention relates to a power line information monitoring method and a monitoring device thereof, which are mainly used in 220V low-voltage power lines to effectively monitor possible behaviors of using power line carrier communication as a concealed communication channel to carry out technology stealing and leaking. Background technique [0002] The power line is the most common physical medium with the widest coverage today, and the power network formed by it is a nearly natural physical network. Utilizing the resource potential of the power grid, under the premise of not affecting the transmission of electric energy, the power transmission network and the communication network are combined into one, making it another communication network after telecommunications, telephone, wireless communication, and satellite communication. It is a hotspot for foreign scientists and technicians to tackle key problems. The power line carrier communication is p...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04B3/54H04B3/48
Inventor 李声扬杜少华胡珂苏德军
Owner 成都立鑫新技术科技有限公司
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