摘要
针对雷达天线前端模拟电路复杂、成本高的问题,设计了一种基于毫米波传感器IWR1642的77GHz雷达水位计。完整设计了雷达水位计所需要的部件,包括平面微带天线、硬件电路以及外壳,采用加速度传感器矫正安装角度,RS485通讯传递数据。阐述了雷达水位计软件的工作流程,采用在快速傅里叶变换的基础上进行选带傅里叶变换的算法计算差频信号的频率。制作了水位计测试样机,并在实验室中完成测试,测量误差小于1 cm,满足雷达水位计的测量要求。
Aiming at the complexity and high cost of the radar antenna front-end analog circuit,a 77GHz radar water level gauge based on the millimeter wave sensor IWR1642 was designed.The components required for the radar water level gauge were completely designed,including a planar microstrip antenna,hardware circuit and the shell,using the acceleration sensor to correct the installation angle,and RS485 communication to transmit data.The workflow of the radar water level gauge software was described.The algorithm of band-selective Fourier transform based on fast Fourier transform was used to calculate the frequency of difference frequency signal.A prototype of a water level gauge was produced and tested in a laboratory.The measurement error was less than 1 cm,which met the measurement requirements of a radar water level gauge.
作者
汪义东
郑宏
WANG Yidong;ZHENG Hong(Hydrology and Water Resources Monitoring Engineering Technology Center,Ministry of Water Resources,Nanjing 210012,China;Jiangsu Naiwch Corporation,Nanjing 210012,China;Nanjing Automation Institute of Water Resources and Hydrology,Ministry of Water Resources,Nanjing 210012,China)
出处
《江苏水利》
2021年第7期14-18,共5页
Jiangsu Water Resources
基金
国家重点研发计划项目(2017YFC0405700)。
关键词
毫米波传感器
雷达水位计
调频连续波
平面微带天线
差频信号
millimeter wave sensor
radar water level gauge
frequency modulated continuous wave(FMCW)
planar microstrip antenna
difference frequency signal
