Landslide MIMO radar monitoring system and monitoring method

Abstract

The invention discloses a landslide MIMO radar monitoring system and monitoring method. Emitting and receiving antennas of the system are an MIMO radar antenna array. Emitting and receiving time-sharing selectors are connected with emitting and receiving antenna array elements respectively. A system synchronization control unit is connected to the emitting and receiving time-sharing selectors through an antenna time-sharing control unit. The monitoring method is characterized by carrying out MIMO antenna array time-sharing emission and step frequency continuous wave signal reception; carrying out inverse Fourier transform and distance compression on echo data, carrying out phase discontinuous correction on radar echo data, calculating time delay compensation factor and carrying out beam forming method azimuth focusing to obtain a high-resolution complex image; carrying out continuous monitoring to obtain a plurality of complex images and forming complex image pairs; and calculating differential interference phase after complex image pair registering and extracting deformation value and carrying out early warning. According to the landslide MIMO radar monitoring system and monitoring method, non-contact remote monitoring is achieved, monitoring range is wide, azimuth resolution ratio is high, real-time performance is high, data acquisition is quick, system device is light and portable, and layout is adjustable.

Description

technical field [0001] The present invention relates to radar technology for monitoring landslides, specifically a MIMO (English abbreviation for multiple-input multiple-output, the original English text is Multi-input Multi-output) radar for landslides based on Stepped Frequency Continuous Wave (SFCW) technology Monitoring system and monitoring method. Background technique [0002] Landslides are one of the major geological disasters, and accidents about landslides are often reported. Statistics show that the number of deaths due to geological disasters such as landslides, collapses and mud-rock flows in my country every year accounts for a quarter of the death toll from various natural disasters. Landslides pose a great threat to people's lives and property safety, so the requirements for real-time monitoring and early warning research of landslides are increasingly urgent. [0003] One of the effective ways to avoid damage caused by landslides is to conduct real-time mo...

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Problems solved by technology

Its defect is that it only adopts the transmission and reception mode of one transmission and one reception or one transmission and two receptions, so its azim

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