摘要
针对目前常用的压差式风速廓线仪测量误差大、移动不便等问题,设计了一种热膜式无线风速廓线仪,并在风蚀风洞中进行了标定。该测试系统可实现多点数据采集和无线传输,具有结构简单、性能可靠、便于携带安装、抗污染和测速范围宽等优点。结果表明,经过标定后的热膜式无线风速廓线仪标定误差在0.379 8 m/s以内,所测试的风速廓线呈指数分布,符合近地表风速垂直分布规律。
A wireless hot-film wind speed profiler as well as its data acquisition and processing system were developed in order to avoid large measuring errors and inconvenience of moving by using conventional pressure differential wind profiler. The tested system was calibrated in soil-erosion wind tunnel. The system can implement multi-points data acquisition and wireless transmission, with the advantages of simple construction, reliable performance, easy carry and installation, anti-contamination and wide range of speed measurement. The experimental result showed that for the calibrated wireless hot-film wind speed profiler, the calibrated error is less than 0. 379 8 m/s, and the measured wind velocity profiler is in exponential distribution, which is in accordance with the characteristic of wind speed perpendicular distribution at near soil surface.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2012年第9期99-102,110,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金资助项目(40861013)
关键词
风蚀
风洞
风速廓线仪
热膜传感器
标定
Wind erosion, Wind tunnel, Wind profiler, Hot-film sensor, Calibration
