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Foundational interference virtual aperture deformation monitoring radar system and working method thereof

A virtual aperture and radar system technology, applied in radio wave measurement systems, electric/magnetic solid deformation measurement, measurement devices, etc., can solve the problems of large volume, inconvenient installation and use, and lack of portability

Active Publication Date: 2020-01-03
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The overall cost of these radar systems is high, bulky and heavy, inconvenient to install and use, not portable, and not suitable for narrow tunnel scenarios

Method used

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  • Foundational interference virtual aperture deformation monitoring radar system and working method thereof
  • Foundational interference virtual aperture deformation monitoring radar system and working method thereof
  • Foundational interference virtual aperture deformation monitoring radar system and working method thereof

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Embodiment

[0121] figure 1 It is the overall structure diagram of the system of the present invention. It consists of a tunnel 1 and a ground-based interferometric virtual aperture radar system 2; several passive corner reflectors 11 can be installed on the wall of the tunnel 1 in the monitoring area as the main monitoring points; the ground-based interferometric virtual aperture radar system 2 consists of a tripod 21, a two-dimensional The turntable 22, the radar subsystem 23 and the data display subsystem 24 are composed; the data display subsystem 24 includes a reinforced tablet computer terminal. The radar subsystem 23 is placed on the two-dimensional turntable 22 fixed on the tripod 21 , and through mechanical rotation, the beam range of the radar subsystem 21 covers all monitoring areas in the tunnel 1 . The radar subsystem 21 transmits a broadband FM continuous wave signal in the millimeter wave band to the tunnel 1 through the transmitting array 233, the inner wall of the tunnel...

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Abstract

The invention discloses a foundational interference virtual aperture deformation monitoring radar system and a working method thereof. The foundational interference virtual aperture deformation monitoring radar system comprises a tripod, a two-dimensional turntable, a radar sub-system and a data display sub-system, wherein the radar sub-system is used for achieving scanning of a special region, and the two-dimensional turntable is used for global scanning. The working method comprises the steps of radiating broadband frequency modulation continuous wave signals at millimeter wave bands to a tunnel through uniform sparse linear arrays distributed at four edges of a rectangle by the radar sub-system, and receiving an echo signal to obtain initial radar echo data; performing first-time virtual aperture processing, namely MIMO processing, to achieve aperture expansion; executing distance to Fourier transform; performing second-time virtual aperture processing, namely forecast extrapolation, to further achieve aperture expansion; and obtaining a high-resolution three-dimensional radar complex image after two-dimensional digital wave beam formation, acquiring an interference map containing a differential phase from primary and secondary images, obtaining inner wall deformation condition of the tunnel after interference map unwrapping and correction, and transmitting the inner wall deformation condition to a data display sub-system.

Description

technical field [0001] The invention relates to the technical field of disaster prevention and reduction, and more specifically relates to a ground-based interference virtual aperture deformation monitoring radar system and a working method. Background technique [0002] At present, with the continuous development of economy and science and technology, my country's road traffic construction has also entered a stage of rapid development. The mileage of new expressways and high-speed railways ranks among the top in the world, and the construction of urban rail transit has also ushered in rapid development. Tunnels are engineering buildings buried in the ground, which account for a large proportion of the total mileage of highways, high-speed railways, and urban subways. During tunnel construction and operation, rapid convergence of surrounding rock or rapid abnormal deformation of rock and soil can lead to tunnel collapse, causing safety accidents and posing a great threat to...

Claims

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Application Information

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IPC IPC(8): G01B7/16G01S13/06G01S7/41
CPCG01B7/16G01S7/41G01S13/06
Inventor 王韬张思麒何秀凤万其昌顾玲榛欧阳凯婷李聪
Owner CHONGQING UNIV
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