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发明授权
CN104204414B 检测和追踪航空引擎风机的损坏或异物对其的冲击 有权

检测和追踪航空引擎风机的损坏或异物对其的冲击
摘要：
本发明涉及一种用于检测航空引擎的风机(1)的变形的系统，该风机包括具有由包括机织纤维的复合材料制成的多个叶片(3)的转子(2)。该系统是显著的在于，叶片(3，13)的每一个中的纤维的至少一个是包括限定了布拉格光栅的至少一部分的光纤(4)，所述系统还包括收发器(6)，其连接至光纤(4)且适合于把光学信号发送到光纤(4)中以及接收来自于光纤(4)的响应中的光学信号；以及检测模块(7,17)，其连接至收发器以便当接收的光学信号表示与对以确定旋转速度的叶片的阻尼冲击的预定标志关联时检测风机(1,11)的变形。此变形可以是异物冲击风机叶片的结果或者它可以因内部缺陷的变化引起。
摘要（英）：

A system for detecting deformation of a fan for an aeroengine, the fan including a rotor including plural blades made of composite material including woven fibers. At least one of the fibers in each of the blades is an optical fiber including at least one portion defining a Bragg grating. The system further includes a transceiver connected to the optical fiber and configured to send an optical signal into the optical fiber and to receive an optical signal in response from the optical fiber, and a detector module connected to the transceiver to detect deformation of the fan when the received optical signal presents correlation with a predetermined signature of a damped impact on a blade at a determined speed of rotation. This deformation may be the result of a foreign object impacting against a blade of the fan or may follow from variation in an internal defect.

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