title: Application of Bragg grating sensors in the characterization of scaled marine vehicle models.
abstract: Experiments using two different fiber-optic Bragg grating strain sensor systems to measure dynamic loads, slamming forces, and bending moments on a scaled catamaran model are reported. The system designed to measure slamming forces is based on dynamic locking of the laser diode wavelength to the peak wavelength of a Bragg grating mounted in a force cell. The sensor system has a dynamic range of 27 dB (1-550 N) and a bandwidth in excess of 1 kHz. For the measurement of bending moments, a time-domain multiplexing system, which used a unique pulsed rf modulation technique, of two Bragg grating sensors mounted on a steel beam was designed. The dynamic range of this system was also 27 dB [17 Nm (Newton meter) with a 0.03-Nm resolution]. The bandwidth was limited to approximately 50 Hz.
authors.forename: D R
authors.initials: DR
authors.lastname: Hjelme
authors.forename: L
authors.initials: L
authors.lastname: Bjerkan
authors.forename: S
authors.initials: S
authors.lastname: Neegard
authors.forename: J S
authors.initials: JS
authors.lastname: Rambech
authors.forename: J V
authors.initials: JV
authors.lastname: Aarsnes