A device for detecting lightning currents in a wind turbine comprises an inductive loop (1) for carrying a current representative of a lightning current and a sensitive element, such as a resistance or a piezoelectric element electrically connected to the inductive loop (1). The apparatus further comprises an optical fibre strain sensor mechanically connected to the sensitive element, such that, in use, a lightning current results in expansion of the sensitive element and the optical fibre strain sensor produces an optical signal indicative of the strain on the sensitive element due to the expansion. The device has the advantage that the optical signal from the optical fibre strain sensor can be processed by the same signal processing equipment that processes signals from other strain sensors provided on the wind turbine.
申请公布号
WO2009109760(A3)
申请公布日期
2009.11.19
申请号
WO2009GB00608
申请日期
2009.03.04
申请人
INSENSYS LIMITED;VOLANTHEN, MARK;OSBORNE, MARK;LLOYD, GLYNN, DAVID