基于光纤传感的小型风力机轴向推力测量研究

Study on Thrust Measurement of Small Wind Turbine Based on Optical Fiber Sensor

获得小型风力机轴向推力的方法通常有两种。一种是理论计算,其准确性不高,必须要进行修正;另一种是接触式的应变片传感测量,灵敏度不高,精度较低。本文提出一种非接触式光纤传感测量方法,实验表明该方法灵敏度比应变片式传感测量提高十倍以上,测量精度达到0.5%,可推广应用于转轴式的轴向推力测量。

There are two methods for thrust measurement of small wind turbine in general. One of which theoretical calculation should be corrected because of its inaccuracy. The other, contact type strain gage has a low sensitivity and accuracy. In this paper, a method with the non - contact type optical fiber measurement was p showed by the experiments that the sensitivity is more than ten times of strain gage and the measurement precision can reach to 0. 5 %. This method can be extended to measure the thrust of running shaft.