Author:

Keywords:

SISTA, Science & Technology, Technology, Physical Sciences, Instruments & Instrumentation, Optics, optical fiber sensor, acoustic emission monitoring, polarimetric setup, Power Data Transmission coil, LASER, 4006 Communications engineering, 4009 Electronics, sensors and digital hardware, 5102 Atomic, molecular and optical physics

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).