KR101708848B1 - Diagnostic system for wind power generator - Google Patents

Abstract

The present invention relates to a blade diagnostic system for a wind power generator. More specifically, the system comprises: a surface wave generation unit receiving an electrical signal to generate a surface wave transferred along the surface of a blade; a surface wave reception unit receiving the surface wave, which is generated in the surface wave generation unit to be transferred to the surface of the blade, to generate an electrical signal; and a controller analyzing the electrical signal generated in the surface wave reception unit to diagnose the condition of the blade. Thus, defect is diagnosed by using the surface wave without placing a sensor inside the blade, so initial defect can be correctly diagnosed. Moreover, the defect is diagnosed by discriminating a type and a position thereof, so establishment of countermeasures can be facilitated.

Description

[0001] The present invention relates to a diagnostic system for a wind power generator,

The present invention relates to a system for diagnosing a blade of a wind turbine blade, and more particularly to a system for diagnosing a blade of a wind turbine blade, and more particularly to a system for diagnosing a blade of a wind turbine blade, And a controller for diagnosing the state of the blade by analyzing an electric signal generated by the surface wave receiving unit, wherein the failure is diagnosed using surface waves without positioning the sensor in the blade, The present invention relates to a wind turbine blade diagnostic system capable of accurately diagnosing an initial failure and diagnosing different types and locations of defects and facilitating establishment of countermeasures.

A wind turbine is a device that converts kinetic energy of wind into mechanical energy to produce electricity. It is composed of a tower installed on the land or sea, a nacelle installed to rotate on top of the tower, A rotor which is installed to rotate in a nacelle for driving a generator and has a plurality of blades and the like. The double blades are the most critical of the wind turbine with the highest frequency of failure and directly affecting the power generation efficiency Lt; / RTI > Therefore, in order to prevent the power generation efficiency from being deteriorated due to contamination and breakage of the blade, it is necessary to perform operations such as cleaning and maintenance, and accurate state diagnosis of the blade is required before performing the above operation. However, since the wind turbine generator is a huge structure, it is difficult to diagnose the condition of the blades. Recently, a system capable of automatically diagnosing the blade condition has been developed as in the following patent document.

<Patent Literature>

Open No. 10-2014-0038149 (published on Mar. 28, 2014) "Structural integrity monitoring of fiber-reinforced composites containing conductive nanomaterials, monitoring method and manufacturing method thereof, and wind power including conductive nanomaterials &Lt; / RTI &gt; and a method for manufacturing the same,

However, since the conventional blade diagnosis system diagnoses the state of the blades by sensing the physical changes of the blades and positioning the sensors inside the blades, it is possible to diagnose the blades only after a certain amount of deformation has occurred, There is a problem that it is not possible to diagnose corrosion or foreign matter adhesion on the surface of the blade irrespective of the physical deformation of the blade.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems,

An object of the present invention is to provide a wind turbine blade diagnostic system for analyzing a change in a surface wave traveling along a surface of a blade to determine the state of the blade.

It is another object of the present invention to provide a wind turbine blade diagnostic system capable of accurately diagnosing an initial failure by diagnosing a failure using surface waves without placing a sensor inside the blade.

It is another object of the present invention to provide a diagnostic system for a blade of a wind turbine blade, which can diagnose the type and location of defects separately and thus can easily establish countermeasures.

Another object of the present invention is to provide a wind turbine blade diagnostic system capable of reducing the diagnosis time by performing a precise diagnosis using a high frequency when an abnormality is suspected after performing a wide range diagnosis using a low frequency .

In order to achieve the above object, the present invention is implemented by the following embodiments.

According to an embodiment of the present invention, there is provided a system for diagnosing a blade of a wind turbine blade, the system comprising: a surface wave generator for generating a surface wave transmitted along a surface of the blade by receiving an electric signal; A surface wave receiving unit for receiving the surface wave generated by the surface wave generating unit and transferred along the surface of the blade to generate an electric signal; and a controller for diagnosing the state of the blade generated in the surface wave receiving unit.

According to another embodiment of the present invention, in the wind turbine blade diagnostic system according to the present invention, the surface wave generating unit generates surface waves having the same frequency as the natural frequency of the surface wave generating unit, .

According to another embodiment of the present invention, in the diagnostic system for a blade of a wind turbine blade according to the present invention, the controller includes a state diagnosing unit for diagnosing a state of the blade by analyzing an electric signal generated in the surface wave receiving unit, The part is characterized by diagnosing the type, extent and position of the blade defects.

According to another embodiment of the present invention, in the diagnosis system for a blade of a wind turbine blade according to the present invention, the state diagnosis unit may be configured to diagnose a state of the blade by considering a change of frequency, amplitude, and phase of a normal electric signal and an electric signal generated by the surface wave receiving unit. And diagnoses a state of the subject.

According to another embodiment of the present invention, in the diagnostic system for a blade of a wind turbine blade according to the present invention, the status diagnosis unit may include a foreign matter inspection module for comparing the electric signal generated in the surface wave receiver with a normal electric signal, A crack checking module for comparing the electric signal generated by the surface wave receiving unit with a normal electric signal to analyze whether a crack has occurred in the blade, and a crack checking module for comparing the electric signal generated by the surface wave receiving unit with a normal electric signal, And a corrosion test module for measuring corrosion resistance.

According to another embodiment of the present invention, in the wind turbine blade diagnostic system according to the present invention, when the state diagnostic section determines that the blade is abnormal, the controller examines the type, degree and position of the blade, And a corresponding signal generating unit for outputting a corresponding signal for generating a corresponding signal.

According to another embodiment of the present invention, in the wind turbine blade diagnostic system according to the present invention, the corresponding signal generator includes a method for calculating a maintenance method of the blade by analyzing the type and degree of the blade, And a risk assessment module for estimating the risk of the blade failure in consideration of the degree and position of the blade.

According to another embodiment of the present invention, in the wind turbine blade diagnosing system according to the present invention, the corresponding signal generating unit may include a result analyzing unit in the state diagnosing unit, a maintenance method calculated in the method calculating module and the risk calculating module, And a display module for outputting a corresponding signal including a risk level.

According to another embodiment of the present invention, in the wind turbine blade diagnostic system according to the present invention, the wind turbine blade diagnostic system further includes an electric signal supply unit for applying an electric signal to the surface wave generating unit, An electric signal adjusting unit for controlling the electric signal supplying unit to adjust a frequency of a surface wave generated by the surface wave generating unit, and a storage unit for storing information used for diagnosis of blade defect occurrence.

According to another embodiment of the present invention, in the diagnostic system for a blade of a wind turbine blade according to the present invention, the electric signal controller may output an electric signal, which enables the surface wave generator to generate a surface wave of a low frequency, Wherein the surface wave generator generates a surface wave of a low frequency by the control of the low frequency generator module and the surface wave receiver receives the surface wave to generate an electric signal, An electric signal for generating a surface wave of a high frequency in the case where the abnormality determining module determines that the blade has an abnormality is output from the electric signal supply unit, The electric signal supply unit And a high frequency generating module for controlling the high frequency generating module.

The present invention can obtain the following effects by the above-described embodiment, the constitution described below, the combination, and the use relationship.

The present invention has the effect of automatically diagnosing the state of the blade by analyzing the change of the surface wave transmitted along the blade surface.

Further, the present invention diagnoses defects by using surface waves without positioning the sensors in the blades, and thus it is possible to accurately diagnose initial defects.

Further, the present invention can diagnose the type and position of defects differently, so that there is an effect that a countermeasure can be easily established.

Further, according to the present invention, when a diagnosis is performed over a wide range using a low frequency, if the abnormality is suspected, the diagnostic time can be reduced by performing a precise diagnosis using a high frequency.

1 is a block diagram of a wind turbine blade diagnostic system in accordance with an embodiment of the present invention.
Fig. 2 is a block diagram showing a detailed configuration of the controller of Fig. 1; Fig.
3 is a block diagram showing a detailed configuration of the electric signal control unit of FIG.
FIG. 4 is a block diagram showing a detailed configuration of the state diagnostic unit of FIG. 2;
5 is a block diagram showing the detailed configuration of the corresponding signal generator of FIG.
6 is a reference diagram for explaining the surface wave generating unit and the surface wave receiving unit of FIG.
7 is a reference diagram for explaining an installation state of the surface wave generating unit and the surface wave receiving unit of FIG.
FIGS. 8 and 9 are reference views for explaining a diagnosis process of a crack occurring in a blade using the diagnostic system of FIG. 1; FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a wind turbine blade diagnostic system according to the present invention will be described in detail with reference to the accompanying drawings. It is to be noted that the same elements among the drawings are denoted by the same reference numerals whenever possible. Unless defined otherwise, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs and, if conflict with the meaning of the terms used herein, It follows the definition used in the specification. Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements, rather than excluding other elements, unless specifically stated otherwise.

FIG. 1 is a block diagram of a diagnosis system for a blade of a wind turbine according to an embodiment of the present invention, FIG. 2 is a block diagram showing a detailed configuration of the controller of FIG. 1, 4 is a block diagram showing the detailed configuration of the state diagnosis unit of FIG. 2, FIG. 5 is a block diagram showing the detailed configuration of the corresponding signal generating unit of FIG. 2, FIG. 6 is a block diagram of the surface wave generating unit of FIG. 7 is a reference view for explaining the state of the surface wave generating unit and the surface wave receiving unit of FIG. 1, and FIGS. 8 and 9 are views for explaining a crack Which is a reference diagram for explaining the diagnostic process of the present invention.

1 to 9, the diagnostic system includes a surface wave generating unit 1 for generating a surface wave to be transferred along the surface of a blade by receiving an electric signal, A surface wave receiving unit 2 disposed at a predetermined distance from the surface wave generating unit 1 and receiving the surface wave generated by the surface wave generating unit 1 and transferred along the surface of the blade to generate an electric signal, A signal converting unit 4 for converting an electric signal generated by the surface wave receiving unit 2 and delivering the electric signal to the controller 5, A controller 5 which is generated in the controller 2 and analyzes the electric signal converted by the signal converting unit 4 to diagnose the state of the blade, Terminal period (6), and the like. The terminal 6 may be, for example, a PC, a notebook, a tablet, a smart phone, a PDA, or the like.

The surface wave generating unit 1 generates a surface wave to be transmitted along the surface of the blade by receiving an electric signal. The surface wave generated by the surface wave generating unit 1 and transferred along the surface of the blade of the wind power generator is transmitted to the surface wave receiving unit 2) and used to diagnose the condition of the wind turbine blades. In the surface wave generating section 1, surface waves having the same frequency (resonance frequency) as the natural frequency of the surface wave generating section 1 are generated, thereby improving the surface wave transmission efficiency. A plurality of surface wave generating units 1 may be provided at predetermined intervals on the surface of the blades. Each of the surface wave generating units 1 may have different natural frequencies, and one surface wave generating unit 1 may have a plurality of It is possible to use a surface wave generating portion that generates a surface wave of high frequency, a surface wave generating portion that generates a low frequency surface wave, a surface wave generating portion that can generate a high frequency and a low frequency surface wave, respectively. The surface acoustic wave generating part 1 may use various known means capable of generating a surface wave to be transferred along the surface of the blade. For example, as shown in FIG. 6, a piezoelectric element made of a piezoelectric element such as lead zirconate titanate (PZT) A substrate 11, electrodes 12 formed on the piezoelectric substrate 11, and the like. When an electric signal (voltage) is supplied to the electrode 12 through the electric signal supply unit 3 to be described later after the surface wave generating unit 1 is positioned on the surface of the blade 100, As the oscillation process is repeated, surface acoustic waves are generated.

The surface wave receiving unit 2 is arranged to be spaced apart from the surface wave generating unit 1 by a predetermined distance and receives surface waves generated by the surface wave generating unit 1 along the surface of the blade to generate an electric signal, A plurality of blades are placed at regular intervals on the surface of the blade. In the case where cracks, corrosion, foreign matter, or the like occurs in the blades, that is, when defects of the blades occur, surface waves transmitted along the surface of the blades are reflected, diffracted, and attenuated so that the electric signals generated by the surface- The diagnostic system analyzes the electric signal generated by the surface wave receiving unit 2 to diagnose the blade condition. The surface acoustic wave receiving unit 1 may use various known means for receiving surface waves transmitted along the surface of the blade. For example, as shown in FIG. 6, a piezoelectric substrate made of piezoelectric elements such as lead zirconate titanate (PZT) (21), an electrode (22) formed on the piezoelectric substrate (21), and the like. When a surface wave generated by the surface wave generating unit 1 and transferred along the surface of the blade reaches the surface wave receiving unit 2, stress is applied to the piezoelectric substrate 22 to generate an electric signal (voltage) To the signal conversion unit 4 through the signal conversion unit 4.

The electric signal supplying unit 3 applies an electric signal to the surface wave generating unit 1, and the surface wave generating unit 1 receiving the electric signal generates a surface wave. The electric signal supply unit 3 supplies an electric signal so that surface waves having the same frequency (resonance frequency) as the natural frequency of the surface wave generating unit 1 are generated. The electric signal supply unit 3 generates an electric signal of, for example, a pulse voltage. The electric signal supplied to the surface wave generating unit 1 under the control of the controller 5 to be described later is adjusted, An electric signal for causing the resonance phenomenon to occur is provided. The frequency of the surface wave generated by the surface wave generating unit 1 varies depending on an electric signal supplied from the electric signal supplying unit 3, which will be described in detail later. The electric signal supply unit 3 may use various known means for supplying an electric signal for generating the surface wave by the surface wave generating unit 1. For example, as shown in FIG. 1, And a power amplifier 32 for supplying a voltage to the load so that the periodic electric signal generated by the function generator 31 is synthesized with the voltage supplied from the power amplifier 32 A pulse voltage is generated and supplied to the surface wave generating unit 1. [

The signal converting unit 4 is configured to convert the electric signal generated by the surface wave receiving unit 2 so that the controller 5 can analyze the electric signal, And is used to diagnose the condition. The signal converting unit 4 includes a preamplifier 41 for raising the output of the electric signal generated by the surface wave receiving unit 2 up to a certain level and a voltage converting unit 41 for converting the voltage data from the electric signal output from the preamplifier 41 And a data collector 42 (e.g., using a DAQ or the like) for collecting and outputting data.

The controller 5 is configured to diagnose the state of the blade by analyzing the electric signal generated in the surface wave receiving unit 2 and converted by the signal converting unit 4 and includes a transceiver unit 51, 52, a state diagnosis unit 53, a corresponding signal generation unit 54, a storage unit 55, a control unit 56, and the like.

The transceiver unit 51 receives information about the electric signal supply unit 3, the signal conversion unit 4 and the terminal 5 and the blade diagnosis (a control signal for generating an electric signal, Electrical signals, corresponding signals, etc.).

The electric signal adjusting unit 52 controls the electric signal supplying unit 3 to adjust the frequency of the surface wave generated by the surface wave generating unit 1. The electric signal adjusting unit 52 includes a low frequency generating module 521, A high frequency generating module 522, a high frequency generating module 523, and the like. The frequency of the surface wave generated by the surface wave generating unit 1 varies according to an electric signal (voltage or the like) supplied from the electric signal supplying unit 3. Specifically, the electric signal adjusting unit 52 adjusts the electric signal 3 so that the frequency of the surface wave generated by the surface wave generating unit 1 is adjusted by adjusting the electric signal (voltage) supplied to the surface wave generating unit 1.

The low frequency generating module 521 controls the electric signal supplying unit 3 so that the electric signal for generating the surface wave of the low frequency is outputted from the electric signal supplying unit 3 . The low frequency has a frequency of 20 to 50 KHz, for example.

The abnormality determination module 522 outputs the low frequency surface wave by the surface wave generation unit 1 under the control of the low frequency wave generation module 521 and receives the surface wave by the surface wave receiving unit 2, If it is generated, the electric signal is analyzed to diagnose the abnormality of the blade.

When the abnormality determining module 522 determines that the blade is abnormal, the high frequency generating module 523 generates an electric signal for generating the surface wave of the high frequency by the surface wave generating unit 1, (3) so as to be output from the electric signal supply unit (3). The high frequency has a frequency of 70 to 100 KHz, for example. The surface wave of the low frequency is advantageous in that the distance traveled is longer than that of the high frequency surface wave. However, the defect of the blade can not be accurately diagnosed. The high frequency surface wave can diagnose the blade defect more accurately than the low frequency surface wave, The diagnostic system first diagnoses the abnormality of the large area of the blade roughly by using the low frequency surface wave. When it is judged that there is an abnormality, it performs the precise diagnosis using the surface wave of the high frequency to diagnose the blade defect accurately and economically Which will be described later in detail.

The state diagnosis unit 53 is configured to diagnose the state of the blades by analyzing the electric signals generated by the surface wave receiving unit 2 and includes a foreign matter inspection module 531, a crack inspection module 532, a corrosion inspection module 533 ) And the like. In the case where cracks, corrosion, foreign matter, or the like occurs in the blades, that is, when defects of the blades occur, surface waves transmitted along the surface of the blades are reflected, diffracted, and attenuated so that the electric signals generated by the surface- The state diagnosis unit 53 analyzes the electric signal generated by the surface wave receiving unit 2 to diagnose the blade state. Hereinafter, when the blade is normal without abnormality, the electric signal generated by the surface wave receiving unit 2 is referred to as a normal electric signal, and the normal electric signal is stored in the storage unit 55, . 8 shows electrical signals obtained by varying the length of the blade cracks (2, 4, 6, 8 cm), and FIG. 9 shows the widths of the blade cracks (medium (5 mm), high (40 mm) (Except for the experiments shown in Figs. 8 and 9, in which different surface acoustic wave generators (1) are used), the voltage (electric signal) decreases as the length and width of cracks generated in the blades become larger have.

The foreign matter inspection module 531 compares the electric signal generated by the surface wave receiver 2 and converted by the signal converter 4 with a normal electric signal to analyze whether foreign matter (pollutants, ice, etc.) .

The crack checking module 532 compares the electric signal generated by the surface wave receiving unit 2 and converted by the signal converting unit 4 with a normal electric signal to analyze whether a crack has occurred in the blade.

The corrosion inspection module 533 compares the electrical signal generated by the surface wave receiver 2 and converted by the signal converter 4 with a normal electrical signal to analyze whether the blade has suffered corrosion (peeling of the surface coating of the blade) . As shown in FIGS. 8 and 9, if a failure occurs in the blade, the frequency, amplitude, and phase of the generated electric signal change unlike the normal electric signal, and the foreign matter (having a great influence on the reflection of the surface wave) The amplitude, and the phase of the electric signal are different depending on the cause of each failure such as corrosion (more attenuation of the surface wave than the corrosion) and corrosion. Therefore, the electric signal is analyzed to detect the type and degree of the defect as well as the defect . 9, since a plurality of the surface wave generating units 1 and the surface wave receiving units 2 are located on the respective blades, the electric signals output from the surface wave receiving units 2 are analyzed, It becomes possible to specify the position.

When the state diagnosis unit 53 determines that the blade has an abnormality, the corresponding signal generation unit 54 checks the type, degree, and position of the blade, and outputs a corresponding signal for blade maintenance. A module 541, a risk assessment module 542, a display module 543, and the like.

The method estimating module 541 is configured to calculate the maintenance method of the blades by analyzing the type and degree of the blades. For example, when foreign matter is generated, the cleaning method is calculated as a maintenance method. The structural repair is calculated, and the replacement of the blade is considered as a maintenance measure when a large crack is generated, and the coating treatment can be calculated as a maintenance measure in case of corrosion.

The risk assessment module 542 estimates the risk of the blade failure in consideration of the type, degree, and position of the blade. For example, when a crack is generated, it is estimated that the risk is higher than when the foreign matter is generated. The risk is high and the risk is high when the position of the crack is located closer to the rotor than the end.

The display module 543 outputs a result corresponding to the result analyzed by the state diagnosis unit 53 and a corresponding signal including a maintenance plan and a risk level calculated by the method estimation module 541 and the risk assessment module 542 The information output from the display module 543 is transmitted to the terminal 6 so that the user can recognize the blade bad state and the countermeasure by intuitive recognition.

 The storage unit 55 stores information required for generating a blade defect occurrence and corresponding signal, information received in the controller 5 and information generated by the controller 5. The controller 56 controls the controller 5, Lt; / RTI &gt;

The method for diagnosing a blade of a wind turbine blade using the wind turbine blade diagnostic system having the above-described configuration includes a low frequency generating step, an abnormality determining step, a high frequency generating step, a detailed diagnosis step, A generation step, a display step, and the like.

The low frequency generating step is a step in which the low frequency generating module 521 controls the electric signal supplying part 3 so that the surface wave generating part 1 generates a low frequency surface wave.

The abnormality determining step may include a step of generating a low frequency surface wave in the low frequency generating step, receiving the surface wave by the surface wave receiving unit 2 to generate an electric signal, and outputting the electric signal converted by the signal converting unit 4, The abnormality determination module 522 analyzes the electrical signal to diagnose whether the blade is abnormal. The abnormality determination module 522 compares the output electric signal with the stored normal electric signal to determine whether the blade is abnormal (in the case of a low frequency, it is possible to move a long distance, but it is difficult to precisely diagnose the blade, ).

The high frequency generating step may include the step of causing the high frequency generating module 523 to generate the high frequency surface wave by controlling the electric signal supplying unit 3 to make the surface wave generating unit 1 generate a high frequency surface wave, to be.

In the detailed diagnosis step, when a high frequency surface wave is generated in the high frequency generating step, the surface wave receiving unit 2 receives the surface wave to generate an electric signal, and the electric signal converted by the signal converting unit 4 is outputted, And the state diagnosis unit 53 analyzes the electric signal to detect the type, degree and position of the blade defect. Since it is not economical to produce electricity as the diagnosis time becomes longer due to the stoppage of the wind turbine when diagnosing the abnormality of the blade, the low frequency surface wave reaches the relatively long surface wave receiving parts (2) The surface wave of high frequency can not reach the surface wave receiving unit 2 but it can be diagnosed precisely. Therefore, first, it is diagnosed whether there is an abnormality in a wide range of the blade by using low frequency surface wave, Precision diagnosis is performed using a high frequency surface wave to detect the type, degree and position of defects, and the accuracy and economical efficiency of the diagnosis can be improved.

The corresponding signal generating step is a step of the corresponding signal generating unit 54 examining the type, degree and position of the blade output in the detailed diagnosis step and outputting a corresponding signal for maintenance of the blade, A method for calculating a maintenance method of a blade, a step of calculating a risk of blade failure based on the type, degree, and position of the blade, a method of calculating a maintenance method of the blade, And an output step of outputting a corresponding signal including a maintenance plan and a risk level calculated in the risk assessment step.

The displaying step is a step in which the terminal displays information output in the corresponding signal generating step.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Should be interpreted as falling within the scope of.

1: surface wave generating part 2: surface wave receiving part 3: electric signal supplying part
4: Signal conversion unit 5: Controller 6: Terminal
11, 21: piezoelectric substrate 12, 22: electrode 31: function generator
32: power amplifier 41: preamplifier 42: data collector
51: Transmitting / receiving unit 52: Electrical signal regulating unit 53:
54: Corresponding signal generator 55: Storage 56:
521: low frequency generating module 522: abnormality judging module 523: high frequency generating module
531: Foreign matter inspection module 532: Crack inspection module 533: Corrosion inspection module
541: Method calculating module 542: Risk calculating module 543: Display module

Claims (10)

delete A surface wave generating unit that receives an electric signal and generates a surface wave to be transferred along the surface of the blade, and a surface wave generating unit that is disposed at a predetermined distance from the surface wave generating unit and receives surface waves generated along the surface of the blade, And a controller for diagnosing the state of the blade by analyzing an electric signal generated by the surface wave receiving unit,
Wherein the surface wave generating unit generates a surface wave having a frequency equal to the natural frequency of the surface wave generating unit so that the surface wave transmitting efficiency can be improved. 3. The apparatus of claim 2, wherein the controller
And a state diagnosing unit for analyzing an electric signal generated by the surface wave receiving unit to diagnose the state of the blade, wherein the state diagnosing unit diagnoses the type, degree and position of the blade defect. 4. The apparatus of claim 3, wherein the condition diagnosis unit
Wherein the state of the blade is diagnosed in consideration of a change in frequency, amplitude, and phase of a normal electric signal and an electric signal generated by the surface wave receiving unit. 5. The apparatus of claim 4, wherein the condition diagnosis unit
A particle inspection module that compares the electric signal generated by the surface wave receiver with a normal electric signal to analyze whether a foreign matter has been formed in the blade; and a crack analyzer that compares the electric signal generated by the surface wave receiver with a normal electric signal, And a corrosion inspection module for comparing the electric signal generated by the surface wave receiving unit with a normal electric signal to analyze whether corrosion of the blade has occurred. 5. The apparatus of claim 4, wherein the controller
Further comprising a corresponding signal generating unit for examining the type, degree and position of the blade and outputting a corresponding signal for maintenance of the blade when the condition diagnosis unit judges that the blade has an abnormality. 7. The apparatus of claim 6, wherein the corresponding signal generator
A method for estimating a maintenance method of a blade by analyzing the type and degree of a blade, and a risk evaluation module for calculating a risk of a blade failure in consideration of the type, degree and position of the blade, Blade diagnostic system. 8. The apparatus of claim 7, wherein the corresponding signal generator
Further comprising a display module for outputting a result corresponding to a result analyzed by the state diagnosis unit and a corresponding signal including a maintenance plan and a risk level calculated by the method estimation module and the risk assessment module. 5. The method of claim 4,
The turbine blade diagnosing system further includes an electric signal supplying unit for applying an electric signal to the surface wave generating unit,
Wherein the controller further comprises an electric signal control unit for controlling the electric signal supply unit so as to adjust the frequency of the surface wave generated by the surface wave generating unit and a storage unit for storing information used for diagnosis of blade fault occurrence. Generator blade diagnostic system. 10. The apparatus of claim 9, wherein the electrical signal controller
A low frequency generating module for controlling the electric signal supplying unit such that the surface wave generating unit generates an electric signal for generating a surface wave of a low frequency; An abnormality determining module that analyzes the electrical signal and diagnoses whether the blade is abnormal when the surface wave receiving unit receives the surface wave to generate an electric signal, And a high frequency generating module for controlling the electric signal supplying unit so that an electric signal for generating the surface wave by the surface wave generating unit can be outputted from the electric signal supplying unit.

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