基于实时互相关原理的风速风向传感器研制

Design of Anemometer Based on Real-Time Cross-Correlation Theory

介绍了国内外风速风向传感器的发展现状,列举出几种风速风向传感器应用场合。为了提高低风速的测量精度,降低现有传感器的成本,提出了基于互相关原理的风速风向传感器的原理和实现。设计了恒流源供电的风速风向传感器、信号调理电路和电压转换电路;通过dsPIC30F4011芯片的A/D模块实现数据的采集处理;通过CAN模块实现系统的远程监控。软件实现上,采用高效实时互相关算法,节省了存储空间,提高了计算效率。实验结果表明,基于互相关原理的风速风向传感器可以实时准确地测得风速风向,对小于10 m/s风速的测量有较高的测量精度。

The development of wind velocity and direction sensor at home and abroad is introduced. Several kinds of wind velocity and direction sensors and their applications are listed. In order to improve the measurement accuracy of low wind speed and reduce the cost of existing sensors, the principle and implement of the sensor are introduced. The sensor circuit in constant-current mode, signal conditioning circuit and voltage convener circuit are designed. The sensor signals are sampled by A/D module in dsP1C30F4011, and transmitted to monitor by CAN. On the realization of software, high-efficient real-time cross-correlation method is designed, which needs relatively small memory requirements and improves the computational efficiency. It is proved that it can get wind velocity and direction exactly using the method, and higher precision when low wind velocity.