Frequency interference suppression device for pulse system ground penetrating radar

Abstract

The invention discloses and provides a frequency interference suppression device for a pulse system ground penetrating radar. The frequency interference suppression device for the pulse system ground penetrating radar comprises a supporting rod which is connected with a support plate which is connected with an absorber plate and the supporting rod is provided with a radar antenna. The frequency interference suppression device for the pulse system ground penetrating radar has the advantages of being capable of timely adjusting the shielding scope and direction by utilizing the groove design and being capable of not only effectively absorbing the electromagnetic clutter but also converting the electromagnetic clutter into the heat energy by absorbing coatings and shielding absorption coatings of the absorber plate to effectively avoid the high frequency oscillation between a shielding cavity and a receiving antenna.

Description

technical field [0001] The invention relates to a radio frequency interference suppressing device for pulse system ground penetrating radar. Background technique [0002] Ground-penetrating radar is an electromagnetic detection device that uses the penetration and reflection characteristics of ultra-high frequency pulsed electromagnetic waves to detect underground media or targets. It can quickly and easily detect underground targets and structures without damaging the surface structure. It is one of the methods with the most application prospects and development prospects in the non-destructive detection technology of various underground targets. It is widely used in urban construction, transportation, geology, archaeology, national defense and other departments. At present, it is mainly used for (1) underground metal or non-destructive Detection of metal buried objects (such as pipes, cables, etc.); (2) detection of steel bars and cables in buildings (such as bridges, buil...

AI Technical Summary

Problems solved by technology

[0004] After searching the literature of the prior art, it is found that many literatures have proposed and studied this problem, such as the Chinese literature titled "Identification of Interference Waves in Ground Penetrating Radar Records", "Characteristic Analysis of Ground Penetrating Radar Interference Waveforms", "Research and Application of Ground Penetrating Radar Echo Signal Preprocessing Method" and dissertation "Research on Ground Penetrating Radar Interference Suppression and Wave Velocity Estimation", "Ground Penetrating Radar Suppression Radio Frequency Interference Technology Research", etc., but looking at these technical documents , the proposed research and solutions all adopt corresponding methods in signal processing, including adaptive beamforming and cancellation, time domain parameter estimation and modeling, frequency domain interference identification and notch, etc. Window-appropriate median filtering, frequency-domain notching, waveform averaging, mutation point detection, wavelet gating, random phase encoding, random equivalent sampling, etc., but these methods are proposed based on the signal received by the ground-penetrating radar receiver. Sufficient signal-to-noise ratio, but in practical applications, if there is strong radio frequency interference on site, it will directly cause the receiver to saturate and fail to work normally

These methods and algorithms have a certain guiding significance for the development of new ground penetrating radars, but they cannot solve the difficulties encountered by ground penetrating radars that have been finalized and used in practice

[0005] After searching the literature of the prior art, it was found that the title of the Chinese literature is "FDTD Analysis of Ground Penetrating Radar Antenna with Shielding Cavity and Absorbing Material". The method analyzes the influence of the shielding cavity and the absorbing material on its radiation characteristics, and the results can provide an intuitive physical basis for the design and improvement of the antenna, but it also cannot solve the problem encountered by the ground-penetrating radar that has been finalized and used in practice. difficulty

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