权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Research on Polarimetric Radar for the Detection of Objects Buried in Wet Snowpack

偏振雷达探测湿积雪埋藏物体的研究

基本信息

批准号：
02650297
负责人：
YAMAGUCHI Yoshio
金额：
$ 1.47万
依托单位：
Niigata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02650297/
关键词：
FM-CW radar Polarization Object detection

项目摘要

This research is aimed at developing a polarimetric FM-CW radar for the detection of objects buried in snowpack. During the period of 1990-1991, we have established an FM-CW radar system operating in the microwave frequency of 1-2 GHz with polarimetric measurement capability. First, the polarimetric and synthetic aperture technique are incorporated in the radar system which enables to retrieve information from targets in detail. Various techniques including antennas and microwave circuits are developed, coupled with the software implementation that control the system as well as computer visualization of the radar echo. Second, the performance of the radar system is verified in an anechoic chamber of Niigata University using a metallic plate as a target, demonstrating the high resolution imaging in the azimuth direction and the importance of polarimetric information. Third, several field measurements were carried out to detect objects buried in natural snowpack at Yamakoshi village, Niigata Prefecture. The radar could detect metallic targets as well as human body embedded in natural snowpack at least 100 cm deep clearly, producing high resolution images of the targets. Especially, the synthetic aperture image provided the clear boundary of the targets in severely cluttered environment. In addition to the principal research objectives, we could have realize a real-time operating radar system, mounted on a van, to detect guard wires and guard rails buried in snowpack on road shoulders. This further developed system utilizing a specially designed digital signal processing circuit may contribute snow shoveling action in snowy region.

本研究的目的是发展一种极化调频连续波雷达探测埋在积雪中的物体。在1990-1991年期间，我们建立了一个调频连续波雷达系统，工作在微波频率为1-2 GHz的极化测量能力。首先，极化和合成孔径技术被纳入到雷达系统中，使得能够从目标详细检索信息。开发了包括天线和微波电路在内的各种技术，以及控制系统的软件实现以及雷达回波的计算机可视化。其次，在新泻大学的电波暗室中，以金属板为目标，验证了雷达系统的性能，证明了方位方向上的高分辨率成像和极化信息的重要性。第三，在新泻县山越村进行了几次实地测量，以探测埋在天然积雪中的物体。该雷达可以清晰地探测金属目标以及嵌入至少100厘米深的天然积雪中的人体，并生成目标的高分辨率图像。特别是在强杂波环境下，合成孔径图像能够提供清晰的目标边界。除了主要的研究目标，我们可以实现一个实时操作的雷达系统，安装在一个货车，以检测保护线和护栏埋在积雪的路肩。该系统采用了专门设计的数字信号处理电路，可在多雪地区进行铲雪作业。