An adaptive line enhancement technique for Fiber Bragg grating-based acoustic emission sensor

摘要

We report on the use of an adaptive signal processing technique called Adaptive Line Enhancement with Coherent Accumulation (ALECA) for improving the time domain signals captured from a Fiber Bragg grating-based acoustic emission sensor. The acoustic emission sensor is able to detect signals from a few kHz to 1 MHz with a sensitivity of 1 micro strain. We demonstrate the usefulness of ALECA for extracting the time domain signals from standard ball drop tests.