Acoustic emission monitoring using a polarimetric single mode optical fiber sensor

Abstract

Growing damage in various materials and constructions often causes high-energy high-frequency acoustic waves. By monitoring these so called 'acoustic emission' events, growing damage can be detected in an early stage before the damage results in catastrophic failure or loss of material functionality. For monitoring large composite structures, an optical acoustic emission monitoring system is presented. The sensing part of the sensor consists of a single mode fiber that is used in a polarimetric configuration. This sensor is combined with transient signal detection techniques (filtering, frame-to-frame analysis, recursive noise estimation) to detect perturbations of the light in the sensor. In this paper the acoustic monitoring capabilities of the system are demonstrated by carrying out bending tests on a short test model for an Intelligent Power and Data Transmitting Composite Coiled Tubing (PDT-coil).

Acoustic emission techniques for failure characterisation in composite top-hat stiffeners

“…Read et al 26 conducted experimental investigations on carbon-fibre composites by embedding and surface mounting optical-fibre sensors. Other researchers such as Pappu et al, 27 Kim et al, 28 Vandenplas 29 and Chen et al 24 confirmed that FBG sensors are promising for damage detection based on the AE approach. In general, optical-fibre sensors can be classified into two major types: interferometric and intensity.…”

Probe pulse design in Brillouin optical time‐domain reflectometry

“…Over the past decades, optical fibre sensors have penetrated every aspect of human life, such as structural health monitoring [1], biosensing [2][3][4], acoustic monitoring [5][6][7], temperature sensing [8], et al Optical fibre sensors can be divided into discrete sensing and distributed sensing [9]. The former schemes measure physical parameters at specified positions in optical fibres, such as the well-known fibre Fabry-Perot (FP) sensing [10], fibre surface plasmon sensing [11], grating sensing [12], and so on.…”

“…Over the past decades, optical fibre sensors have penetrated every aspect of human life, such as structural health monitoring [1], biosensing [2–4], acoustic monitoring [5–7], temperature sensing [8], et al. Optical fibre sensors can be divided into discrete sensing and distributed sensing [9].…”