SIGNAL PROCESSING DEVICE FOR MONITORING STATE OF WIND-POWER TURBINE BLADES AND METHOD THEREOF

摘要

The present invention relates to a signal processing device for monitoring states of wind-power turbine blades and a method thereof, the signal processing device comprising: an optical fiber sensor unit for sensing moment of rotation of three blades so as to output the moment of rotation as blade signals; a signal transformation unit for converting three blade signals into two fore-ape signals; a rotation information input unit for sensing rotation information of the blades; a rotation speed estimation unit for estimating a rotation speed of the blades on the basis of the rotation information; a state determination unit which removes rotation components from the fore-ape signals and determines whether an operation of a blade is abnormal; and an output unit for outputting the determination result. According to the present invention, two fore-ape signals which are simpler than three blade signals can be processed such that an efficient signal analysis is enabled and the efficiency of determining a state of blades is improved, thereby efficiently managing and maintaining the blades.

主权项

1. A signal processing device for monitoring states of wind turbine blades, comprising:
an optical fiber sensor unit measuring wind load moments exerted on first to third blades and outputting first to third blade signals corresponding to the measured wind load moments; a signal transformation unit transforming the first to third blade signals into first and second fore-ape signals representing two orthogonal moments; a rotation information input unit calculating and outputting rotation information indicating a physical location of at least one of the first to third blades; a rotation speed estimation unit estimating a rotation angular velocity of the blades based on the rotation information sent from the rotation information input unit; a state determination unit determining whether operation of the first to third blades is abnormal based on first and second transformation signals obtained by removing rotation components corresponding to the estimated rotation angular velocity from the first and second fore-ape signals; and an output unit outputting a determination result as to normality or abnormality of the operation of the first to third blades.