Patent ID: 8891070

Claim:
A flexible pipe system comprising an unbonded flexible pipe comprising an at least partly integrated sensor system, the unbonded flexible pipe has a centre axis, a length and a longitudinal direction along the length and comprises an inner sealing sheath and at least a first armoring layer comprising a plurality of elongated armoring elements arranged around the internal sealing sheath, the sensor system comprising: a plurality of optical fiber sensor units, at least one light pump for optically pumping the optical fiber sensor units, a data collecting unit, and a computing unit, wherein the optical fiber sensor units are optically connected to the data collecting unit, and the data collecting unit is in data communication with the computing unit, wherein the first armoring layer is a first sensor containing armoring layer in that at least one of the elongated armoring elements of the first sensor containing armoring layer is a sensor containing element, the sensor containing element or elements each having integrated therein at least a part of one or more of the optical fiber sensor units, the optical fiber sensor units of the first sensor containing armoring layer extending along a monitoring length section of the flexible pipe, and the optical fiber sensor units being arranged to measure a change in strain of the respective sensor containing elements, the sensor system being arranged to detect a change of strain in an elongated element without a sensor unit connected to the sensor system.