Migratory Insect Multifrequency Radar Cross Sections for Morphological Parameter Estimation
Migratory Insect Multifrequency Radar Cross Sections for Morphological Parameter Estimation
复制标题
DOI：
10.1109/tgrs.2018.2884926
复制
发表时间：
2019-06-01
影响因子：
8.2
通讯作者：
Wu, Kongming
中科院分区：
文献类型：
--
作者：
Wang, Rui;Hu, Cheng;Wu, Kongming
昆虫迁徙提供了重要的生态系统服务，有时，迁徙性害虫会造成严重的作物损害和产量损失。物种识别在昆虫迁飞的研究中是至关重要的，无论是昆虫学家还是害虫管理者。雷达是探测昆虫迁飞的有效手段。目前的昆虫雷达通常工作在X波段，信号幅度信息被用来估计体重和翅膀拍打频率，然后可以用来将迁徙昆虫分类到广泛的类群。为了提高识别性能，本文提出了一种新的雷达测量昆虫质量和体长的方法。研究了昆虫在X波段和Ku/K波段的多频雷达散射截面（RCS）特性，建立了RCS与昆虫形态参数的综合关系，为昆虫质量的估算提供了新的方法。更重要的是，基于微波暗室中矢量网络分析仪获得的实验数据，还可以实现体长的估计，准确度为84%。如果将来可以通过雷达获得多频RCS测量，那么高度准确地估计昆虫的质量和体长将是可能的，尽管目前建造能够在如此宽的频率范围内进行所需测量的雷达仍然是一个挑战。
Insect migration provides major ecosystem services, and sometimes, migratory pests cause serious crop damage and yield loss. Species identification is critically important in studies of insect migration, for both entomologists and pest managers. Radar is an effective means of detecting insect migrants. Current entomological radars usually operate at X-band, and signal amplitude information is used to estimate body mass and wing-beat frequency, which can then be used to categorize migratory insects into broad taxon classes. To improve the identification performance, this paper presents a novel radar method of measuring insect mass and body length. The multifrequency radar cross sections (RCS) of insects at X-band and Ku-/K-band are fully investigated, and the comprehensive relationship between RCS and insect morphological parameters provides an improvement in the estimation of insect mass. More importantly, estimations of body length can also be realized with an accuracy of 84% based on experimental data acquired by a vector network analyzer in a microwave anechoic chamber. If multifrequency RCS measurements can be obtained by radar in the future, then highly accurate estimations of insect mass and body length will be possible, although it is currently still a challenge to build a radar capable of making the required measurements over such a wide frequency range.