基于双频连续波雷达技术的木材中白蚁无损检测
投稿时间:2020-06-22  修订日期:2020-06-28  点此下载全文
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作者单位E-mail
马春雨 南京林业大学信息科学技术学院 2590009141@qq.com 
张丹 南京林业大学信息科学技术学院 zhangdan@njfu.edu.cn 
丁振东 南京林业大学信息科学技术学院  
宗楚菁 南京林业大学信息科学技术学院  
基金项目:国家自然科学基金资助项目(31170668);南京林业大学高层次人才项目资助(163070694)
中文摘要:本文提出了一个双频连续波雷达系统用于检测木材中的白蚁活动,建立了一个双频CW系统检测算法,利用接收信号的多普勒频移开发并测试了一个软件雷达系统,其中多普勒的变化反应白蚁的活动,同时分析了被腐蚀木材中白蚁的存活性。实验表明,通过调整木材和检测仪器的间距,对功率频谱和相位数据采集分析,结果确定木材和检测仪器的间距最小为50厘米;相位信息也是确定白蚁存在的一个重要的指标。。
中文关键词:双频  连续波雷达  白蚁检测  多普勒  相位信息  腐蚀
 
Nondestructive Detection of Termites by Dual Frequency Continuous Wave Radar
Abstract:In this paper, a dual frequency CW radar system is proposed to detect the activity information of termites in wood. A dual frequency CW system detection algorithm is established. A software radar system is developed and tested by using the Doppler shift of the received signal to detect termites. The Doppler variation reflects the activity information of termites. The existing activity of termites in the wood corroded by termites is analyzed, meanwhile. The experiment shows that by adjusting the distance between the wood and the detection instrument, the power spectrum and the phase data are collected and analyzed. The result shows that the distance between the wood and the detection instrument is at least 50 cm. The phase information is also an important index to determine the existence of termites.
keywords:Two-frequency  CW radar  Termite detection  Doppler  phase information  corrosion
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