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

A technology for audio signal and damage monitoring, applied in wind turbines, wind turbine monitoring, engines, etc., can solve problems such as failure to monitor blade leading edge protective paint damage, save data processing procedures, improve data processing efficiency, and ensure timely sexual effect

Active Publication Date: 2021-12-28
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 signal
  • Damage monitoring method and system for fan blade protective paint based on audio signal
  • Damage monitoring method and system for fan blade protective paint based on audio signal

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 present application relates to an audio signal-based damage monitoring method and system for fan blade protective paint, including a training phase and an online operation phase. The sound signal containing the aerodynamic noise of fan sweeping is collected by audio equipment for a period of time, and the sound signal is analyzed to realize real-time monitoring and fault diagnosis of the damage to the protective paint of fan blades. The present application achieves the purpose of non-destructive testing while being able to monitor the health state of the blade in real time. At the same time, the application can give early warning to the deteriorating blades and guide the time point of maintenance.

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 Patents(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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