论文标题
SFCW GPR树根检测通过热带地区的时间频率分析增强
SFCW GPR tree roots detection enhancement by time frequency analysis in tropical areas
论文作者
论文摘要
使用地面穿透雷达（GPR）对树根进行准确监测对于评估树木健康非常有用。在高水分热带地区，例如新加坡，由于根腐病而造成的树木掉落会导致生命和特性丧失。由于水分含量高，热带复杂的土壤特性倾向于影响信号的穿透深度。这限制了GPR的深度范围。通常，宽带信号用于增加穿透深度并改善GPR的分辨率。但是，这种宽的带频率往往是嘈杂的，降低噪声需要选择性频率过滤。因此，在本文中，我们适应了阶梯频率连续波（SFCW）GPR，并提出了称为短时间傅立叶变换（STFT）的联合时间频率分析（JTFA）方法，以减少噪声并增强树根检测。通过对照实验和真实的树根测试对所提出的方法进行了说明和测试。结果表明，热带地区的树根检测方法的前景令人鼓舞。
Accurate monitoring of tree roots using ground penetrating radar (GPR) is very useful in assessing the trees health. In high moisture tropical areas such as Singapore, tree fall due to root rot can cause loss of lives and properties. The tropical complex soil characteristics due to the high moisture content tends to affect penetration depth of the signal. This limits the depth range of the GPR. Typically, a wide band signal is used to increase the penetration depth and to improve the resolution of the GPR. However, this broad band frequency tends to be noisy and selective frequency filtering is required for noise reduction. Therefore, in this paper, we adapt the stepped frequency continuous wave (SFCW) GPR and propose the use of a Joint time frequency analysis (JTFA) method called short time Fourier transform (STFT), to reduce noise and enhance tree root detection. The proposed methodology is illustrated and tested with controlled experiments and real tree roots testing. The results show promising prospects of the method for tree roots detection in tropical areas.
