Study on the Thickness Variation Law of Rectangular Cavity Ground Penetrating Radar Imaging Curve
Due to the continuous renovation and transformation of urban infrastructure,the problem of urban underground cavity is caused.Through the ground penetrating radar scanning technology,the whole detection process of underground rectangular cavity is studied.The detection process is divided into four stages,and the variation law of imaging curve thickness is studied.The thickness variation law of the imaging curve of the rectangular cavity during the horizontal operation of the ground penetrating radar is analyzed.The thickness of the rectangular cavity point measure-ment curve under different sizes is studied,and the thickness variation law of the rectangular cavity imaging curve is explained by the actual detection case.The results show that when the ground penetrating radar detects the rectangular cavity,the thickness of the imaging curve is a symmetrical curve that increases first and then decreases.The maximum thickness of the curve is at both ends of the horizontal arc on the image,which is near the diagonal of the actual rectan-gular cavity.When the radar point is measured,the thickness of the imaging curve increases with the increase of the rectangular cavity.In the image,the larger the cavity is,the thicker the line is.
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