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Damage monitoring method and system for fan blade protective paint based on audio signals

An audio signal and damage monitoring technology, applied in the direction of wind turbines, wind turbine monitoring, engines, etc., can solve the problem of not monitoring the damage of the protective paint on the leading edge of the blade, so as to save data processing procedures, improve data processing efficiency, and ensure high efficiency. sexual effect

Active Publication Date: 2021-05-11
CYBERINSIGHT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there is no method for monitoring the damage of the protective paint on the leading edge of the blade through the aerodynamic noise sound signal generated by the wind sweeping of the blade

Method used

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  • Damage monitoring method and system for fan blade protective paint based on audio signals
  • Damage monitoring method and system for fan blade protective paint based on audio signals
  • Damage monitoring method and system for fan blade protective paint based on audio signals

Examples

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Embodiment

[0055] In this embodiment, an audio signal collected in real time by a certain wind field is used as a case for introduction.

[0056] image 3 It is a comparison chart of the relationship between the original data and the rotational speed and the maximum sound pressure level after data filtering and frequency band selection. The left side is the original data, and the right side is the data after data filtering and target frequency band selection. The abscissa is the rotation speed, and the ordinate is Maximum sound pressure level (Max SPL). It can be seen that the energy level of the entire frequency band of the original data has a certain linear relationship, but the variance is large, and the difference between the rated speed and some specific speeds is significantly larger. After screening data such as speed and recalculating the energy level by selecting frequency bands with obvious sweeping sound characteristics, the linear relationship between the maximum sound press...

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Abstract

The invention relates to a damage monitoring method and system for a fan blade protective paint based on audio signals. The method comprises a training stage and an online operation stage. Sound signals including fan sweeping pneumatic noises within a period of time are collected through audio equipment, and real-time monitoring and fault diagnosis of fan blade protective paint damage are achieved by analyzing the sound signals. According to the method, the health state stage of the blade can be monitored in real time, and meanwhile, the purpose of nondestructive testing is achieved. Meanwhile, early warning can be carried out on the deteriorated blade, and the maintenance time point is guided.

Description

technical field [0001] The present application relates to an audio signal-based damage monitoring method and system for fan blade protective paint, which is applicable to the technical field of fan health monitoring. Background technique [0002] Wind turbine blades are one of the important components for wind turbines to convert wind energy into mechanical energy. They are the basis for obtaining higher wind energy utilization coefficients and economic benefits. The condition of the blades directly affects the performance and power generation efficiency of the whole machine. When the blade is running, the particles in the air around the blade will continue to corrode the leading edge of the blade: including raindrops, hail, salt spray, sand and stones, and wild high-altitude organisms, etc., the direct impact is to destroy the aerodynamic shape of the blade, thus It affects the aerodynamic performance of the entire unit, resulting in the loss of annual power generation. At...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D17/00
CPCF03D17/00
Inventor 鲍亭文朱小芹王旻轩刘展金超
Owner CYBERINSIGHT TECH CO LTD
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