Abstract
A description of the development and practicaldeployment of an optical fibre Bragg grating strain sensorsystem for structural monitoring is given. The system hasevolved through practical trials involving sailing yachts and aturbo-prop driven aircraft.This paper gives an account of the strain sensor system whichuses parallel fibre channels with multiplexed Bragg gratingsensors in each. The sensors are interrogated using a combinedbroad band light source and tunable optoelectronic filter.Sensor update rates of 500 Hz per sensor for up to 40 sensorswere achieved. The deployment of two systems based on this architecture are described: the first in a luxury `superyacht'in which Bragg sensors were embedded within its 35 m carbonfibre mast; the second in a Jetstream aircraft where surfacebonded Bragg grating strain `rosettes' were flown under extremeconditions.
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