基于塑料光纤的大应变测量研究

Research on large strain measurement based on plastic optical fiber

分析了塑料光纤(POF)光强弯曲损耗与弯曲半径的关系;推导了基于弯曲效应的POF测量大应变的数学模型,并建立了大应变测量系统。重点通过实验研究,验证了理论分析的正确性,实验结果表明:应变测量范围可达8%以上,测量灵敏度高,重复性好。

The relationship between bend losses in plastic optical fibers and bend radius is analyzed theoretically. The mathematical model of large strain measuring based on plastic optical fibers is deduced and a corresponding measurement system is established. Through experimental research, the measured values are verified coincide well with the model. Experimental results show that the strain measurement range can be up to 8% and the system has advantages of high sensitivity and good repeatability.