摘要
为了解决现有超声波测风仪测量精度小、电路设计复杂、霜雪等恶劣天气测量误差大等问题,设计一款基于TDC-GP22的高精度超声波风速风向测量仪,时间测量精度可以达到22 ps,采用小波阈值降噪法处理测量数据有效地剔除电磁干扰、空气中固体颗粒对信号的反射等测量误差。给出以STM32F407和TDC-GP22为核心控制芯片的系统总体框架设计,详细论述超声波驱动发射、高精度时间差测量、信号调理、探头自动加热、数据去噪的具体实现过程。测试结果表明,该系统的测量精度和可靠性满足要求。
A high-precision ultrasonic anemoscope based on TDC-GP22 was designed to solve the problems of low precision,complex circuit design,and large measurement error of severe weather(such as frost and snow)existing in available ultrasonic anemoscope,whose time measurement accuracy can reach up to 22 ps.The wavelet threshold noise reduction method used to process the measuring data can eliminate the electromagnetic interference,reflection of solid particle in air on signal,and measurement error.The framework design of the overall system taking STM32F407 and TDC-GP22 as the core control chip is given.The realization processes of ultrasonic drive emission,high-precision time difference measurement,signal conditioning,automatic probe heating and data denoising are discussed in detail.The test results show that the measurement accuracy and reliability of the system meet the design requirements.
作者
邢玉品
陈晓
XING Yupin;CHEN Xiao(School of Electronic and Information Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,China;Collaborative Innovation Center of Atmospheric Environment&Equipment Technology,Nanjing University of Information Science and Technology,Nanjing 210044,China)
出处
《现代电子技术》
北大核心
2018年第21期128-131,136,共5页
Modern Electronics Technique
基金
江苏省第十一批"六大人才高峰"高层次人才项目
江苏省自然科学基金(BK20161536)
江苏高校优势学科Ⅱ期建设工程资助项目~~
关键词
超声波
高精度
TDC-GP22
风速
风向
小波阈值降噪
ultrasonic wave
high precision
TDC-GP22
wind speed
wind direction
wavelet threshold denoising
