【摘要】 基于磁致伸缩效应,利用Fabry-Perot干涉仪原理,设计了一种光纤电流传感器。该传感器用一根单模光纤既作传感光纤又作参考光纤,从而有效地消除了环境变化和光纤内双折射对传感器的不良影响。文中从理论上分析了传感器的工作原理,推导了数学模型,并用实验进行了验证。由实验可知,此传感器具有抗干扰能力强、稳定性好,精度高等优点。在1～120mA的测量范围内,精度可达0.20％。更多还原

【Abstract】 An alternative current sensor, based on mangnetostriction is demonstrated, which utilizes Fabry-Perot interferometer in a single-mode fiber. This technique effectively eliminates fluctuations of ambient changes and internal birefringence of optical fiber. It is shown both theoretically and experimentally that the proposed configuration significantly improves accuracy and dynamic range of the system. The accuracy of 0. 2% has been achieved over the measurement range 1-120 mA with this sensor.更多还原