Electromagnetic environment test system for extracting electromagnetic leakage signal by utilizing wavelet transformation

Abstract

The invention belongs to electromagnetic environment test systems, in particular to the electromagnetic environment test system which utilizes wavelet transform to extract electromagnetic leakage signals, which is characterized by comprising: a broadband antenna for receiving leakage electromagnetic field signals around an electromagnetic environment or an electronic device and converting the leakage electromagnetic field signals into voltage signals, a spectrum analyzer for carrying out the collection, the filtration and the detection of the signals which are transmitted by the antenna and converting continuous signals into digital processing signals, and a measurement and control computer with a GPIB card, which comprises a loaded electromagnetic environment test control part and is used for controlling the spectrum analyzer to output the signals according to the set parameters; and the electromagnetic environment test system is used for processing the obtained collection signals. The electromagnetic environment test system leads the test result to be scientific and accurate, and especially carries out the scientific calculation and the extraction of weak signals, thereby preventing the mis-processing of the signals due to human factors; simultaneously, the leveled automatic alarm of the electromagnetic leakage signals can effectively prompt the level of the leakage signals to working staff.

Description

technical field [0001] The invention belongs to an electromagnetic environment testing system, in particular to an electromagnetic environment testing system which uses wavelet transform to extract electromagnetic leakage signals. Background technique [0002] Information technology equipment will produce strong electromagnetic radiation during operation, which may cause serious leakage of important data information processed or stored by it. Therefore, in some important occasions, the measurement of electromagnetic signals and the real-time monitoring of the environment play a very important role in effectively monitoring and eliminating the hidden dangers of information leakage caused by radiation leakage, and have attracted more and more attention. [0003] At present, most of the automatic tests in electromagnetic radiation detection and electromagnetic compatibility are based on standard standardized tests in a standard laboratory environment. They are more concerned ab...

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Problems solved by technology

[0003] At present, most of the automatic tests in electromagnetic radiation detection and electromagnetic compatibility are based on standard standardized tests in a standard laboratory environment. They are more concerned about whether the emission amplitude exceeds the standard, but they do not care about the automatic extraction and characteristic analysis of the exceeded signal, which cannot satisfy information leakage. Leak signal detection requirements in the field of prediction and protection

Especially in the actual application of electromagnetic environment, the detection and extraction of information leakage signals are still dominated by manual testing. The execution of the testing process and the extraction and analysis of signals are all completed by the on-duty personnel, which is highly subjective and difficult to distinguish by human observation. Weak electromagnetic signals cause misjudgment and omission of some signals, etc.

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