Wind-electricity draught fan blade crack damage online monitoring device and monitoring method thereof

Abstract

A wind-electricity draught fan blade crack damage online monitoring device includes a piezoelectric thin film sensor module, a wireless signal receiving module, a data processing module, and a main control system communication module; the piezoelectric thin film sensor module is arranged on wind-electricity draught fan blades and is electrically connected with a charge amplifying module, an A/D conversion module and a wireless transmitting module; the wireless signal receiving module is used for receiving a signal collected by the piezoelectric thin film sensor module and outputted by the wireless transmitting module; the data processing module is used for processing the signal received by the wireless signal receiving module, so as to on-line monitoring whether crack damage of the wind-electricity draught fan blades exists or not; the main control system communication module is electrically connected with the data processing module and is used for controlling operation of the wind-electricity draught fan blades. A natural vibration frequency band is used for determining the damage, the influence of environmental changes and vibration of draught fan self parts is reduced, the monitoring accuracy is improved, and the device is more adaptive and can quickly accurately perform on-line real-time monitoring of the crack damage of the wind-electricity draught fan blades.

Description

technical field [0001] The invention relates to the technical field of power generation systems, in particular to an online monitoring device and monitoring method for crack damage of wind turbine blades. Background technique [0002] Wind power is the fastest growing energy source in the world, with an annual growth rate of more than 30% in installed capacity. In February 2005, the "Kyoto Protocol" aimed at limiting greenhouse gas emissions in developed countries to curb global warming came into effect, which brought a very positive impact on the development of the wind power industry. Data released by the European Wind Energy Association and the Global Wind Energy Association show that in 2009, the global installed wind power generation capacity reached 37,500 megawatts, equivalent to the total power generation of 23 EPR nuclear power units. [0003] Wind power generation is an emerging industry. Although there are disadvantages such as small industrial scale and large on...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to provide a wind turbine blade crack damage online monitoring method aimed at the defects of the prior art, such as the traditional monitoring method for cracks in wind turbine blades, which requires point-by-point scanning, heavy workload, and reduced monitoring efficiency. monitoring device

[0008] The second purpose of the present invention is to provide a wind turbine for the defects of the prior art, such as the traditional monitoring method for cracks in wind turbine blades, which requires point-by-point scanning, heavy workload, and reduced monitoring efficiency. On-line Monitoring Method of Blade Crack Damage

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