Automatic crack detection and alarm system and method for vane of wind driven generator

Abstract

The invention discloses an automatic crack detection and alarm system and method for a vane of a wind driven generator. The system consists of a detection device and control equipment, wherein the detection device automatically detects the state of the vane according to deformation of a bonded resistance strain gage and controls an alarm module to send an alarm signal; when detecting the state of the vane, the detection device has a function of detecting humiture information of a surrounding environment; interiors of the system are mutually connected through a ZigBee network, so that a complicated network layout is not required; and the system has a simple structure. The system communicates with the outside through general packet radio service (GPRS), so that a management department can master the state of the vane and the humiture information timely; devices with low power consumption are adopted in the system, and a method for regularly detecting residual sleep time is adopted, so that the power consumption is reduced to the maximum extent. The automatic crack detection and alarm system can be widely used for automatically detecting the state of the vane of a wind turbine generator set in real time; according to the detection technology, the vane with a crack can be pre-warned, so that the secure and reliable running of the vane is guaranteed; and the system has high economic and social benefits.

Description

technical field [0001] The invention belongs to the field of wind power generation, in particular to a system and method for automatic detection and alarm of blade cracks of a wind power generator. Background technique [0002] As the world's energy crisis becomes more and more serious, and the public's demand for improving the ecological environment is increasing, wind energy, as a clean and renewable energy source, is increasingly valued by governments. The wind power industry is gradually developing into a new industry that has begun to take shape. In terms of long-term benefits, wind power generation is a strategic measure to ensure sustainable development. The blade is one of the key components of the wind turbine, and its cost accounts for 15-20% of the total cost of the wind turbine. The performance of the blade directly affects the efficiency, life and performance of the wind turbine. Wind turbines generally operate in remote areas or offshore, and the loads on the...

AI Technical Summary

Problems solved by technology

The replica method has low cost and high resolution, but it is labor-intensive and time-consuming, and it is difficult to apply to the test environment outside the laboratory; the potential method is suitable for crack growth in high temperature and corrosive media; direct observation by microscope The method is the most direct test method among various methods, which is characterized by high resolution and high precision, and can be used in high-temperature environmental media conditions, but the cost is high; acoustic emission technology is almost not limited by materials, and can monitor the initiation and expansion of cracks. Dynamic monitoring, but the mechanical noise in the actual environment will interfere with the monitoring system

[0004] In summary, these methods have realized the detection of crack damage to a certain extent, but due to the heavy workload, low efficiency, or high cost of using the above methods to detect wind turbine blades, they cannot be effectively applied. It is difficult to popularize the detection of cracks in large fan blades

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