The method of forming probing signals of georadars on the basis of direct digital synthesizers for geodynamic monitoring
| Autor: | Grecheneva A V, Dorofeev N V, Kuzichkin O R, Surzhik D I, Romanov R V |
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| Jazyk: | English<br />French |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | MATEC Web of Conferences, Vol 272, p 01044 (2019) |
| Druh dokumentu: | article |
| ISSN: | 2261-236X 43013406 |
| DOI: | 10.1051/matecconf/201927201044 |
| Popis: | The features of the formation of probing signals based on direct digital synthesizers for geodynamic monitoring of medias using georadar probing are considered in the article. The basic requirements for the formers of probing signals and the shortcomings of known technical solutions are shown. To eliminate them, as a former of probing signals of georadars was suggested to use direct digital synthesizers with improved spectral characteristics, achieved by introducing circuit of an automatic compensation of phase distortion with a control device in the form of a phase-locked loop. With this construction, the device contains a combination of autocompensation and filter methods of improving the spectral characteristics of the output signal of the synthesizer. To analyze the effectiveness of the proposed solutions, were obtained the necessary mathematical relationships describing the functioning of the device under research and implemented its schematic simulation, which showed the possibility of improving the spectral characteristics of the proposed former of probing signals by 10-15 dB. |
| Databáze: | Directory of Open Access Journals |
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