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A Ground-Based Interferometric Virtual Aperture Deformation Monitoring Radar System and Working Method

A virtual aperture and radar system technology, applied in radio wave measurement system, electric/magnetic solid deformation measurement, measurement device, etc., can solve the problems of non-portability, high cost, large volume, etc.

Active Publication Date: 2021-05-04
CHONGQING UNIV
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  • Summary
  • 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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  • A Ground-Based Interferometric Virtual Aperture Deformation Monitoring Radar System and Working Method
  • A Ground-Based Interferometric Virtual Aperture Deformation Monitoring Radar System and Working Method
  • A Ground-Based Interferometric Virtual Aperture Deformation Monitoring Radar System and Working Method

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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 ground-based interference virtual aperture deformation monitoring radar system and a working method. It is composed of a tripod, a two-dimensional turntable, a radar subsystem and a data display subsystem. The radar subsystem realizes specific area scanning, and the two-dimensional turntable realizes global scanning. The radar subsystem uses a uniform and sparse linear array distributed on the four sides of the rectangle to radiate broadband FM continuous wave signals in the millimeter wave band to the inner wall of the tunnel and receives the echo signals to obtain initial radar echo data; after the first virtual aperture processing, MIMO After processing, aperture expansion is realized; range-to-Fourier transform is performed; the second virtual aperture processing is performed, that is, prediction extrapolation processing, to further realize aperture expansion; high-resolution three-dimensional radar complex is obtained after two-dimensional digital beamforming processing. Image, the interferogram including the differential phase is obtained from the primary and secondary images, and after the interferogram is unwrapped and corrected, the deformation of the inner wall of the tunnel can be obtained and transmitted to the data display subsystem.

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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Patent Type & Authority Patents(China)
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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