科研之友
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摘要
A light micro-deformation monitoring radar based on frequency modulation continuous wave (FMCW) technique is proposed and designed for scenes which are sensitive to micro deformation such as slopes, dams, and high buildings. The miniradar is well suited to measure micro-deformation of buildings or mountains. Meanwhile, interferometric method was used by the radar to obtain high range resolution of the micro-deformation monitoring radar. The radar acquires micro deformation of the target by inversion of phase difference between the transmitted and received waves. To get an accurate micro-deformation measure result, the radar was carefully designed in signal mode and hardware structure. Various experiments are used in the article to verify the radar’s deformation measure ability. The experiments prove that the radar can measure micro deformation accurately and timely. For example, railway bridges’vibration can be monitored by the radar in real time. In addition, it can be used in structures monitoring, disaster alarming and other regions.
