System for monitoring the condition of rotor blades at wind turbines

摘要

Some examples relate to a system for monitoring the condition of rotor blades at wind turbines. A plurality of sensor nodes can be coupled to a rotor blade. A respective at least one sensor can be present at the individual sensor nodes for the spatially resolved detection of vibrations and/or acoustic waves of the rotor blade and the sensor nodes can be connected via optical fibers to a central supply and reception unit. A light source can be present at the central supply and reception unit and electromagnetic radiation can be conducted from it via an optical fiber to a photovoltaic converter with which the received electromagnetic radiation can be converted into electric energy. The electric energy can be utilized.

主权项

1. A system for monitoring the condition of a rotor blade of a wind turbine, comprising:
a central supply and reception unit; a central light source disposed proximal the central supply and reception unit and configured to emit electromagnetic radiation; a transducer node fastenable to the rotor blade, the transducer node connected via one or more optical fibers to the central supply and reception unit; a photovoltaic converter coupled to communicate with the central light source via the one or more optical fibers and configured to convert the electromagnetic radiation from the central light source into electric energy; electronics disposed proximal the transducer node and configured to receive the electric energy from the photovoltaic converter; a transducer disposed proximal the transducer node and the electronics, the transducer configured to spatially resolve detection of waves associated with vibratory motion of the rotor blade, wherein the electronics are coupled to the transducer and configured to power the transducer and to receive a transducer signal from the transducer; a distal light source and optical modulator coupled to the electronics and configured to be powered by the electric energy, wherein the optical modulator is configured to communicate with the electronics to transmit an optical transducer signal associated with the transducer signal; and an optical detector present at the central supply and reception unit, the optical detector coupled to the optical modulator via the one or more optical fibers and configured to receive the optical transducer signal, wherein the transducer is configured to emit waves to excite vibrations and/or acoustic waves in the rotor blade.