摘要
时差法是超声风速风向测量系统的基本方法。在介绍时差测量原理的基础上,分析了系统测量误差的来源;构建了增大测量范围的凹面反射模型;结合该模型,在系统结构、电路系统、控制流程及数据处理算法等方面进行了全面的设计和实现,并制成了原理样机。风洞试验结果表明,凹面反射结构可以增加系统的测量范围,提高大风条件下测量数据的稳定性。原理样机具有体积小、可靠性高、测量范围大的优点,已在风力发电方面获得了实际应用,并取得了较好的应用效果。
Time difference measurement method has been extensively used in ultrasonic anemometer system. Based on the principle of the time difference method of measuring the speed and direction of wind, the cause of the measurement error in the measuring system is analyzed. In this paper a concave reflector model is adopted to increase the measuring range in contrast with the plane reflection model. With this model, the corresponding structure design, circuit design, control process and signal processing methods of the ultrasonic anemometer system are discussed, and a prototype system is implemented. The experimental results indicate that the ultrasonic anemometer system has broad measurement range and high stability in high wind speeds. Besides, the prototype system has the advantages in small size, high resolution and reliability, which has been used in wind power generation and got good effects.
出处
《声学技术》
CSCD
2014年第4期336-340,共5页
Technical Acoustics
关键词
凹面反射
超声波
测量系统
concave reflector
ultrasonic
anemometer system
