热式风速计恒温差控制的软件实现及其性能测试（英文）

Development and Test of Software Method to Achieve Constant-Temperature-Difference Control for Thermal Wind Sensor

介绍了一种利用软件实现热式风速风向传感器恒温差模式（CTD）控制的方案。传感器系统采用单片机作为主控单元,对芯片温度和环境温度进行采样,并以此为依据调节输出功率,从而实现恒温差状态的控制。实验表明,采用这种软件控制方案,在无风状态下,在-20℃到40℃的环境温度变化范围内,热式风速风向传感器能够基本维持输出信号恒定不变。除此之外,该风速风向传感器系统还可以实现对0-20 m/s风速范围内的风速测量,最大测量误差不超过8%,并且具有低于15 s的响应速度。

A software method for controlling constant temperature difference（CTD）mode for the thermal wind sen-sor has been presented. As control unit,MCU is utilized to sample ambient temperature and chip temperature andadjust the power for output in order to maintain the state of CTD. The experiment shows that by means of the soft-ware method for control,the thermal wind sensor could almost maintain the output constant during the temperaturerange from-20 ℃ to 40 ℃. Besides,it can measure the wind speed during 0-20 m/s with relative error less than8% which has a response speed of less than 15 seconds.