作 者：
刘海洋;常佳丽;侯占峰;陈智;宣传忠;商晓彬
关键词：
风速廓线仪;热敏电阻;自动采集;无线传输;实时数据处理
摘 要：
针对常用风速廓线仪线路连接复杂、体积和功耗大、测量精度与自动化程度低且无法实现数据的实时记录与处理,致使研究退化草地近地表风速变化规律、地表粗糙度及其抗风蚀能力等诸多困难等问题,基于热敏电阻和无线传感网络技术,设计了具有体积小、功耗低、测量精度高的热敏式风速传感器和具有自动风向识别与无线数据传输功能的近地表风速廓线仪,实现了环境温度、湿度、大气压力、近地表风速等数据的自动采集、无线传输和实时处理等功能。试验表明:该风速廓线仪的旋转启动风速为3.7 m/s,风速测量范围为0~16 m/s,精度不低于0.3 m/s,最大响应时间为3 s,一次充电可连续工作7 h以上,能够准确反映近地表风速随高度的变化规律,风速廓线的指数拟合度在0.9以上;软件系统可实现对最多6个风速廓线测点的循环自动采集与处理,在射频功率最大、空中传输速率为2.4 kb/s时,35字节的数据包有效传输距离不低于500 m,6个节点完成一次数据传输所需时间不超过10 s。该系统具有功耗低、使用方便、操作简单、自动数据采集等优点,能够满足近地表风速变化规律的研究需要。
译 名：
Investigation on Near-surface Wireless Wind Speed Profiler Based on Thermistors
作 者：
LIU Haiyang;CHANG Jiali;HOU Zhanfeng;CHEN Zhi;XUAN Chuanzhong;SHANG Xiaobin;College of Mechanical and Electrical Engineering,Inner Mongolia Agricultural University;
关键词：
wind profiler;;thermistor;;automatic acquisition;;wireless transmission;;real-time data processing
摘 要：
Currently,wind speed profilers in common use have many problems,such as complex wiring,large volume,high power consumption,low measurement accuracy and automation level. They are also unable to achieve the real time recording and data processing. These bring many difficulties to study the variation law of near surface wind velocity,terrain roughness and its ability to resist wind erosion of degraded grassland. A thermal wind speed sensor which had small volume,low power consumption,high precision measurement was developed,and a near-surface velocity profiler with functions of automatic wind-direction recognition and wireless data transmission was designed,which can realize data automatic collection,wireless transmission and real-time data processing of environmental temperature,humidity,atmospheric pressure and near-surface wind speeds. Experiment results showed that the rotating start-up wind speed of the profiler was 3. 7 m/s,and the measurement range of the wind sensor whose maximum response time was no more than 3 s was 0 ~ 16 m/s with accuracy not less than 0. 3 m/s. It can work continuously more than 7 h with one time charge,reflecting the change rule of the near-surface wind speed in height accurately with goodness of fitting of wind speed profiles above 0. 9. The system can circularly scan up to six testing points,automatic collect and process wind speed data. The length of data packet was 35 bytes,the effective transmission distance can reach 500 m and the data transfer time for six testing points was less than 10 s under the conditions of 2. 4 kb/s transfer rate and maximum transmitting power. The system had advantages of low power consumption,easy to use,simple operation,automatic data acquisition,which can satisfy the needs of studying the change rule of near-surface wind speed.
