Development of an affix-type multipoint pressure sensor by use of FBG

Abstract

An affix-type multipoint pressure sensor was developed by using the Fiber Bragg Grating (FBG) technology. The FBG technology is commonly used in optical communications and is being applied to the stress/strain measurement of a large structure recently. In this paper, the developed pressure sensor by use of FBG and the pressure measurement system are described. The FBG pressure sensor can be stuck on the surface of a body on which pressures will be measured, and is capable of the temperature compensation by using an FBG temperature sensor. The material and diameter of the diaphragm of the sensor and the pre-tension of the fiber were determined according to the pressure measurement test under static pressures. Pressure distributions on a circular cylinder in uniform flow were measured in a circular water channel, where pressures were also measured by a conventional strain-gauge type pressure sensor. Comparing the measured pressures, performances of the FBG pressure sensor are discussed.

Ship motions and unsteady pressures on ship hull in oblique waves estimated by potential-based solvers

“…6-DOF ship motions were measured. In addition, pressure on the ship hull was measured using 212 FBG pressure sensors (version 6) [10,12] and 59 strain-type pressure sensors. The positions of pressure sensors attached to or installed in sections can be seen in [13].…”

“…In addition, pressures on the ship hull were measured because it is an important physical quantity for calculating wave loads. By installing a new type of pressure sensor, FBG pressure sensors [10,11,12], pressures were measured at 212 points simultaneously. In addition, 59 points were measured using conventional strain-type pressure sensors.…”