雷达探测技术在水葫芦监测中的应用

Application on Radar Detection Techniques in Monitoring of Eichhornia Crassipes

以上海市苏州河为例,分析了水葫芦监测预警现状,从入射仰角、频率、俯仰波束以及应用环境等方面对雷达探测技术在水葫芦监测中应用进行了理论分析,并选择2种频率(24、75 GHz)雷达样机对水葫芦、绿草、矿泉水瓶、泡沫板、芭蕉叶进行原理验证试验。结果表明:雷达探测技术应用于水葫芦在线监测是可行的,对于不同电磁特性的目标探测物能够有效区分,探测雷达探测性能与目标属性以及目标探测凸出离水面高度有关,与水面齐平及水下部分目标探测物无法识别。实际应用中建议选用有35、75 GHz等商业应用的频段雷达,并应通过建立水葫芦电磁特性数据库,提升雷达探测设备性能。

The current situation of monitoring and early warning of eichhornia crassipes was analyzed by the example of Suzhou River of Shanghai.The application of radar detection technology in eichhornia crassipes monitoring was analyzed theoretically from the aspects of incident elevation angle,frequency,pitching beam,application environment and et al.And two kinds of radar samples with different frequencies(24 GHz and 75 GHz)were used to verify the principle of eichhornia crassipes,green grass,mineral water bottle,foam board and banana leaf.The results showed that the radar detection technology was feasible for on-line monitoring of eichhornia crassipes.For different electromagnetic characteristics of the target detector could be effectively distinguished by the radar.The detection performance of the detection radar was related to the target attributes and the height of the target detection protrusion from the water surface,while the awash and submerged parts were undetectable by this technology.It is suggested that the commercial radar with 35 GHz and 75 GHz should be selected,and the performance of radar detection equipment should be improved by establishing the electromagnetic property database of eichhornia crassipes in practical application.