KR101105452B1 - Apparatus for detecting crack of train railway sleeper - Google Patents

Abstract

Railroad sleeper crack inspection apparatus is provided that can accurately and accurately inspect the cracks of concrete railroad sleepers while automatically moving along the bogie. Railroad sleeper crack inspection apparatus, the device for inspecting the crack of the railroad sleeper while being transported mounted on the truck, comprising: an image acquisition unit for obtaining an image of the railroad sleeper to measure the crack; A hitting part generating vibration by applying a hit to the position of the railway sleeper according to the acquired image; A driving unit for driving the striking unit so that the striking unit can strike the railway sleeper; An acoustic acquisition unit for acquiring an acoustic waveform generated by the impact of the strike and the vibration of the railway sleeper; And a crack analysis unit which compares and analyzes the predetermined waveform and the obtained hitting waveform and acoustic waveform, and determines whether a crack has occurred in the railroad sleeper according to the comparative analysis result, wherein the hitting position of the hitting part is a concrete sleeper and the bogie is obtained. It is transported to align the hitting position according to the image, and the bogie is characterized in that it is automatically transferred to the next position after testing one railway sleeper.

Railway sleeper, crack inspection, blow waveform, acoustic waveform, bogie, vision inspection, piezo sensor

Description

Apparatus for detecting crack of train railway sleeper}

The present invention relates to railway sleeper crack inspection, and more particularly, to a railway sleeper crack inspection apparatus for inspecting the crack of the concrete railway sleeper while automatically transported along the bogie.

The difference between railway and other transportation is that trains run on a certain track. In general, trains for transporting people or cargoes are moved along railroads installed on the ground or underground. There are railway tracks by train or subway.

The railway track is composed of a rail formed continuously, a plurality of sleepers supporting the lower portion of the rail and a gravel or concrete layer supporting such sleepers, where conventional sleepers are expensive oak trees or inexpensive pine trees. Although the service life of the price ratio is relatively short, the sleepers made of concrete are mainly used in recent years.

1a and 1b is a perspective view and stages for explaining the structure of a general railway rail, Figure 2 is a diagram illustrating a railway rail or railway sleeper cracks.

As shown in Figs. 1A and 1B, a general railway rail is laid on a solid roadbed 3 with a predetermined thickness 4, and laid on the sleeper 2 by laying the sleepers 2 at regular intervals thereon. The railroad rails 1 of the string are fastened in parallel at predetermined intervals. The upper part of the icon (4), which plays an important role of directly supporting the train load with the subgrade below the construction surface (surface of the road surface), is generally referred to as a track.

As described above, the track is mainly composed of a railroad rail 1, a fastener (not shown), a sleeper 2, and a drawing 4, and the railroad rail 1, as shown in FIG. 1b) is in contact with the sleeper 2, the upper surface of the railway rail (1a) is in contact with the train, while supporting the train directly to induce the running of the train. The sleeper 2 transmits the load received from the railroad rail 1 to the phase 4, and maintains the position of the railroad rail 1. The figure 4 transmits the load received from the sleeper 2 to the roadbed 3 widely, maintains the position of the sleeper 2, and alleviates the impact force due to elasticity.

At this time, the sleepers 2 are usually arranged 15 to 17 copies per 10m of rail length, the spacing between the sleepers and sleepers should be kept constant, the height (horizontal) should be kept constant. If the interval between the sleepers is not constant or the height is different, the load of the train is not evenly distributed, and as shown in FIG. 2, the railroad rail 1 is bent or cracked, or the sleepers 2 are cracked. (5) occurs, and thus the wear of the railway rails 1 or the wheels becomes uneven and the noise and vibration become severe. In addition, there is a problem that the maintenance cost of the rail (1) or sleeper (2) or the wheel is increased and the aging of the train is accelerated, there is a problem that the riding comfort worsens when running the train.

On the other hand, the inspection of the vehicle and track inspection of rail and rail, the fixing member of the rail fixing member, the evaluation of the suitability of the track is dependent on the inspection technicians with long experience. Thus far, humans directly inspect the tracks and rail fixing members for defects and breakages, which is a waste of time, manpower, and economic waste. There was a problem.

In particular, the subjective factors according to the weather, the environment, and the responsibility of the examination coating have a direct impact on the inspection, as well as acting as a huge burden on the safety issues of the examination coating that can occur under various circumstances. .

On the other hand, as a prior art, Korean Patent Application No. 2004-84870 (application date: October 22, 2004) discloses an invention named "railroad track defect detection and management system, automatic detection and management method" The bar will be described with reference to FIG. 3.

3 is a block diagram of a defect automatic detection and management system of the railway rail according to the prior art.

Referring to FIG. 3, a defect automatic detection and management system for a railway rail according to the related art includes an ultrasonic detection unit 10, an image detection unit 20, an image processing unit 30, a database 40, and a location tracking system ( 50), the marking unit 60 and the display unit 70 and the maintenance management unit 80 is configured to include.

The ultrasonic detection unit 10 is for inspecting the defect or damage of the railroad tracks by using ultrasonic waves reflected on the railroad tracks, and the reflection of the rail tracks. Check it. Specifically, the ultrasonic detection unit 10 emits ultrasonic waves into a railroad track, and the ultrasonic wave generator 11 for receiving the reflected ultrasonic waves, and the analog wave received by the ultrasonic wave generator 11 digital An A / D conversion unit 12 for converting into a signal, a digital information unit 13 for digitally converting the digital signal into a standardized computer protocol, and a pattern feature extraction unit for extracting features of a pattern included in the digital information ( 14) and after determining the characteristics of the pattern extracted by the pattern feature extraction unit 14 to determine whether the railway track defects and damage, and then outputs the information to the image detection unit 20 as a result of the abnormality determination unit And (15).

Here, the image detecting unit 20 acquires an image of the position of the rail and the rail fixing member by using the data input from the ultrasonic detecting unit 10, and then obtains an image obtaining unit, a noise removing unit and an image. It can be configured to include a reading unit. Here, the image acquisition unit is a camera capable of high-speed shooting, the camera can be taken at high resolution even at a speed of 500Km or more speed, even if the recently opened high speed train is 300Km / h can be taken with sufficient resolution. In this case, at least one to three cameras may be installed to photograph the rails and the rail fixing members installed on both sides of the rails.

The abnormality determining unit 15 checks whether the railway track is cracked or damaged and outputs a control signal indicating that a defect has occurred to the image detecting unit 20 when it is determined that the degree of cracking and damage has exceeded an allowable value. do.

When the ultrasonic detection unit 10 configured as described above generates ultrasonic waves and checks the existence of the surface of the railway track and the discontinuity therein, and analyzes whether the track is defective or damaged, it is determined that the track is defective or damaged. By outputting a control signal from the image detecting unit 20 to perform another reading through imaging of the railway track, it is possible to check whether the railway rail is defective or damaged.

However, in the case of the automatic detection and management system of railway rail defects according to the prior art, it is difficult to identify the crack position of railway sleepers because it is necessary to acquire images using a camera mounted on a high-speed train and capable of high-speed shooting. There is a problem that it is difficult to accurately inspect the defects, such as the inside of the rail by ultrasonic, in the case of railway sleepers, the number is too large, it is impossible to fully inspect it.

The technical problem to be solved by the present invention for solving the above-mentioned problems is to provide a railway sleeper crack inspection apparatus that can be inspected at high speed to crack the railroad sleeper while being automatically transported mounted on the truck.

Another technical problem to be achieved by the present invention is to provide a railway sleeper crack inspection apparatus capable of accurately inspecting cracks in railway sleepers by comparing and analyzing the impact waveform caused by the hitting part and the acoustic waveform caused by vibration.

As a means for achieving the above-described technical problem, the railway sleeper crack inspection apparatus according to the present invention, in the device for inspecting the crack of the railroad sleeper while being mounted and transported on the bogie, to obtain an image of the railway sleeper to measure the crack An image acquisition unit; A striking unit generating vibration by striking the position of the railway sleeper according to the acquired image; A driving unit for driving the hitting part so that the hitting part hits the railway sleeper; An acoustic acquisition unit for acquiring a hit waveform generated by the hit and an acoustic waveform according to the vibration of the railway sleeper; And a crack analysis unit configured to compare and analyze a predetermined waveform with the obtained blow waveform and acoustic waveform, and determine whether a crack has occurred in the railroad sleeper according to the comparison analysis result, wherein the blow position is a concrete sleeper. The bogie is transported to align the striking position according to the acquired image, and the bogie is characterized in that it is automatically transferred to the next position when no crack occurs in the railway sleepers.

Here, the crack analysis unit, an amplifier for amplifying the hitting waveform and the acoustic waveform; An analog / digital (A / D) converter for converting the amplified striking waveform and the acoustic waveform into a digital signal; And a comparison analyzer configured to determine whether a crack is detected by comparing the blow waveform and the acoustic waveform converted into the digital signal according to a signal processing program with a waveform in a predetermined steady state.

The comparison analyzer may determine whether the railway sleeper is cracked based on a time domain analysis, a frequency domain analysis, or a wavelet analysis.

Here, the blow waveform generated by the hit is characterized in that obtained through the piezo sensor attached to the hitting portion.

Here, the railway sleeper crack inspection apparatus according to the present invention may further include a display for displaying the image obtained by the image acquisition unit so that the operator can align the hitting position while checking with the eye.

Here, the railroad sleeper crack inspection apparatus according to the present invention, when it is determined that the cracks in the railroad sleeper by the crack analysis unit, may further include an accelerometer crack detection sensor for precisely measuring the cracks of the railroad sleeper. have.

According to the present invention, the cracks of the railroad sleepers can be inspected at high speed while being mounted on the truck and automatically transferred.

According to the present invention, it is possible to accurately inspect the crack of the railway sleeper by analyzing the impact waveform by the hitting part and the acoustic waveform by the vibration.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

As an embodiment of the present invention, there is provided a railway sleeper crack inspection apparatus that can be easily and accurately inspect the crack of the railway sleeper while being mounted on the truck.

4 is a view for explaining the principle of the railway sleeper crack inspection apparatus according to an embodiment of the present invention.

Referring to FIG. 4, the railroad sleeper crack inspection apparatus according to the embodiment of the present invention is mounted on the trolley 210 and is transported along the trolley 210 while hammering the hammer 140 near the railroad rails 300L and 300R. By hitting the railroad sleeper 310 by), by measuring the sound according to the vibration of the railroad sleeper 310 to inspect the cracks.

The railway rails 300L and 300R are supported by the concrete sleepers 310 and the striking position is aligned with the concrete sleepers 310. That is, the image acquisition unit 120, for example, by acquiring the image of the railway rails (300L, 300R) and railway sleepers 310 by a CCD camera, and after confirming the image by a vision program, hitting unit 140 The bogie 210 is transported so that it can be aligned to the striking position, for example, the positions indicated by reference numerals A and B. FIG.

The hammer 140, which is a hitting part, is hit by the driving unit 130, and the operation of the driving unit 130 is controlled by the control of the PC 110 mounted on the trolley 210.

In addition, the hitting unit 140 is equipped with a piezo sensor to obtain a hitting waveform obtained by the hitting, the acoustic waveform is obtained by the sound acquisition unit 150, for example, a microphone (microphone).

The PC 110 mounted on the trolley 210 has a built-in crack analysis unit to compare and analyze the hitting waveform and the acoustic waveform according to a predetermined signal processing program, so that cracks have occurred in the railway rails 300L and 300R. It is determined whether or not, the specific crack analysis operation will be described later.

Thereafter, the cart 210 is automatically transferred to the next position when no crack occurs in the railroad sleeper 310.

On the other hand, Figure 5 is a block diagram of a railway sleeper crack inspection device according to an embodiment of the present invention.

Referring to FIG. 5, the railroad sleeper crack inspection apparatus 100 according to an embodiment of the present invention is a device for inspecting cracks of railroad sleepers while being mounted and transported on a vehicle, including a PC 110, an image acquisition unit 120, The driver 130, the hitting unit 140, and the sound acquiring unit 150, wherein the PC 110 includes a control unit 111, a display 112, and a crack analyzing unit 113. In the embodiment of the present invention, the image acquisition unit 120 may be implemented by a CCD camera, the hitting unit 140 may be implemented by a hammer, and the sound acquisition unit 150 may be implemented by a microphone.

The image acquisition unit 120 obtains an image of the railroad sleeper 310 to be fixed to a predetermined portion of the cart 210 to measure cracks.

The striking unit 140 generates vibration by striking the position of the railroad sleeper 310 according to the obtained image. At this time, the hitting position of the hitting part 140 is a concrete sleeper 310. In addition, the blow waveform generated by the hit is obtained by a piezo sensor (Piezo Sensor) attached to the hitting unit 140. Here, the piezo sensor is a sensor in which a thin piezoelectric element is sandwiched between metal plates, and can detect sound, vibration, and pressure. In this case, the piezoelectric element generates electricity when pressure is applied, and vibrates when AC electricity is applied. have.

The driving unit 130 drives the striking unit 140 so that the striking unit 140 strikes the railway sleeper 310, and may be implemented by, for example, a DC motor or a stepping motor.

The sound acquiring unit 150 acquires the sound wave generated by the hitting and the sound wave according to the vibration of the railway sleeper 310.

The crack analysis unit 113 in the PC 110 compares and analyzes a predetermined waveform with the obtained blow and acoustic waveforms, and determines whether a crack has occurred in the railway sleeper 310 according to the comparison analysis result. .

The display 112 in the PC 110 displays an image acquired by the image acquisition unit so that the worker can align the hitting position while checking visually.

The controller 111 in the PC 110 controls the acquired image to be displayed on the display 112, controls the driving of the driving unit 130, and transfers the trolley 210. The driving of the transfer unit 220 is controlled.

Railroad sleeper crack inspection apparatus 100 according to the present invention may further include an accelerometer crack detection sensor (not shown), the crack analysis unit 113 by the crack is generated in the railroad sleeper 310 When determined, the accelerometer crack detection sensor may accurately measure the crack of the railway sleeper 310.

Thereafter, the balance 210 is transported to align the hitting position according to the acquired image, and the balance 210 is also provided when the crack does not occur in the railroad sleeper 310, the balance transfer part 220. Is automatically transferred to the next position.

6 is a detailed configuration of the crack analysis unit in the railway sleeper crack inspection device according to an embodiment of the present invention.

Referring to FIG. 6, in the railway sleeper crack inspection apparatus according to the embodiment of the present invention, the crack analysis unit 113 may include an amplifier 113-1, an A / D converter 113-2, and a comparison analyzer 113-3. ) And a signal processing program 113-4.

The amplifier 113-1 amplifies the impact waveform obtained by the hitting part and the acoustic waveform Mic obtained by the railway sleeper vibration, and the A / D converter 113-2 amplifies the amplified hitting. The waveform and the acoustic waveform are converted into digital signals.

The comparison analysis unit 113-3 compares the blow waveform and the acoustic waveform converted into the digital signal according to the signal processing program 113-4 with the waveform of a predetermined steady state to determine whether there is a crack. In this case, the comparison analyzer 113-3 may determine whether the railway sleeper is cracked based on a time domain analysis, a frequency domain analysis, or a wavelet analysis result.

Here, the concept of the wavelet (Wavelet) is as follows.

Fourier Transform (FT), the most common technique for analyzing signals, is a technique that converts a value expressed as a function of time into a function of frequency. In other words, it is a method of calculating the magnitude of each sine wave by seeing that the sine waves having different frequencies overlap each other. This Fourier transform method is particularly useful for analyzing electrical signals in which several sine waves of different frequencies are mixed and are used to reduce noise by removing only signals of unwanted frequencies from the signal.

Wavelets are more advanced Fourier transforms (FTs). While the Fourier transform (FT) uses infinitely repeated sine waves as the fundamental waveform, only the frequency is changed and the correlation is revealed. Wavelet uses the waveform of one wavelength as the basic waveform and changes its magnitude and position to reveal the correlation. Technology. Here, changing the size is the same concept as changing the frequency of the FT, but changing the position is Wavelet's unique method.

However, in the case of Fourier transform (FT), since the infinitely repeated sinusoidal waveform is a fundamental waveform, the time information disappears when it is changed as a function of frequency. That is, it is possible to know which frequency components are many, but it is not known at which position the components appear in time. However, Wavelet has the advantage of knowing the time information as well as the frequency information because the wavelet of one wavelength changes its position along with its size. Analysis of a signal by Fourier transform (FT) shows a two-dimensional graph of the frequency and amplitude axes, while wavelet analysis shows three dimensions of the scale, translation, and value axes. Can be represented graphically.

These wavelets are mainly used for noise reduction or signal compression through signal analysis. For example, it is used for the analysis of signals whose waveforms are completely different from sinusoidal waveforms such as heart rhythm and brain waves, or where local signals have a significant influence on the analysis. Used for

On the other hand, Figure 7 is a view for explaining the striking operation in the railway sleeper crack inspection apparatus according to an embodiment of the present invention.

Referring to FIG. 7, in the railway sleeper crack inspection apparatus according to an exemplary embodiment of the present invention, the hammer 140, which is a hitting part, is operated by the driving unit 130 implemented as a stepping motor, and the height of the railway sleeper 310 is measured by the height of the railway sleeper 310. h) and angle [theta] are adjusted so that the force exerting the blow is adjusted. In this case, as described above, the hammer 140, which is the hitting part, may be attached to a piezo sensor to obtain a hitting waveform.

8 is a view illustrating a waveform measured in the railway sleeper crack inspection apparatus according to an embodiment of the present invention.

8 a) shows the impact waveform measured by the piezo sensor when the impact is applied to the railway sleeper 310 in the railway sleeper crack inspection apparatus according to the embodiment of the present invention, for example, time t Can be given by force (F). In addition, b) of FIG. 8 is a sound generated by the vibration of the railway sleeper 310 after the impact is applied to the railway sleeper 310, and represents an acoustic waveform obtained by the microphone, for example, a damped sine wave (Damped Sine) Wave).

On the other hand, Figure 9 is a view for explaining the image acquisition operation in the railway sleeper crack inspection apparatus according to an embodiment of the present invention, Figure 10 is a view illustrating an image screen in the railway sleeper crack inspection apparatus according to an embodiment of the present invention to be.

Referring to FIG. 9, in the railway sleeper crack inspection apparatus according to the embodiment of the present invention, the image acquisition unit 120 is a CCD camera and is fixed by a support 121 to a predetermined portion of the trolley 210 to prevent cracking. Obtain an image of railway sleeper 310 to be measured. In this case, the area photographed by the CCD camera is determined by the photographing angle θ2, and photographs the concrete railway sleeper 310.

The image captured by the image acquisition unit 120 is displayed on the display 112 as shown in FIG. 10, and the display screen 400 represents the rail 410, the sleeper 420, and the hitting part 430. In this case, the trolley 210 is transferred to a desired accurate hitting position. In this case, the balance 210 may be transferred by the wheel 230 driven by the balance transfer part 220.

On the other hand, Figure 11 is a flow chart of the railway sleeper crack inspection method according to an embodiment of the present invention.

Referring to FIG. 11, in the railway sleeper crack inspection method according to an exemplary embodiment of the present invention, first, an image of a railroad sleeper to measure a crack using a CCD camera is obtained (S110).

Next, the position to apply the hit by arranging the balance according to the acquired image (S120).

Next, a vibration is generated by applying a hit to the aligned railroad sleeper position through the hitting unit (S130), and a hitting waveform generated by the hitting and an acoustic waveform according to the vibration of the railway sleeper are obtained (S140).

Next, a comparative analysis of a predetermined waveform and the obtained hitting waveform and acoustic waveform (S150), and determines whether a crack occurred in the railway sleeper according to the comparison analysis result (S160). In this case, it may be determined whether the railway sleeper is cracked according to a time domain analysis, a frequency domain analysis, or a wavelet analysis.

Next, when it is determined that a crack has occurred in the railroad sleeper, the site is precisely measured (S170), or when it is determined that cracking has not occurred in the railroad sleeper, the truck is automatically transferred to the next position. .

Here, the precise measurement of the site can be measured by the acceleration method, in the normal case, if the normal railway sleeper is subjected to the impact load of the upper tension tension vibration at a specific frequency in the vertical direction, but if there is a large crack, the railway sleeper Under the impact load of the upper part, structural vibration occurs in the low frequency region due to cracking. In other words, when there is a crack, low frequency due to cracks appears larger than standing waves, so it is possible to determine the presence or absence of cracks by frequency analysis of the acceleration or the signal of the microphone, and fine cracks can be determined by the same mechanism. have.

On the other hand, Figure 12 is a view illustrating a time domain analysis results in the railway sleeper crack inspection method according to an embodiment of the present invention, Figure 13 illustrates a frequency domain analysis results in the railway sleeper crack inspection method according to an embodiment of the present invention 14 is a view illustrating a wavelet analysis result in the railway sleeper crack inspection method according to an embodiment of the present invention, which is to compare the characteristics of each good / defective product to determine the good / bad.

As shown in (a) to (c) of FIG. 12, in the railway sleeper crack inspection method according to the embodiment of the present invention, the time domain analysis result shows that the waveform has a relatively long length and a large amplitude when it is defective. Can be. Here, the horizontal axis represents time and the vertical axis represents voltage.

As shown in (a) to (c) of FIG. 13, in the railway sleeper crack inspection method according to an embodiment of the present invention, the frequency domain analysis result indicates that the level of the band of 1 kHz to 10 kHz is relatively large when the defective product is defective. Able to know. Here, the horizontal axis represents frequency and the vertical axis represents spectral density.

As shown in a) to c) of Figure 14, in the railroad sleep cracking test method according to an embodiment of the present invention, the wavelet analysis result, it can be seen that the image of the elliptical portion is relatively indefinite. .

The foregoing description of the present invention is intended for illustration, and those skilled in the art can understand that the present invention can be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. There will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

1A and 1B are a perspective view and a cross-sectional view for explaining the structure of a general railway rail.

2 is a diagram illustrating railway sleeper cracks.

3 is a block diagram of a defect automatic detection and management system of the railway rail according to the prior art.

4 is a view for explaining the principle of the railway sleeper crack inspection apparatus according to an embodiment of the present invention.

5 is a block diagram of a railway sleeper crack inspection device according to an embodiment of the present invention.

6 is a detailed configuration of the crack analysis unit in the railway sleeper crack inspection device according to an embodiment of the present invention.

7 is a view for explaining the striking operation in the railway sleeper crack inspection apparatus according to an embodiment of the present invention.

8 is a view illustrating a waveform measured in the railway sleeper crack inspection apparatus according to an embodiment of the present invention.

9 is a view for explaining the image acquisition operation in the railway sleeper crack inspection apparatus according to an embodiment of the present invention.

10 is a diagram illustrating an image screen in the railway sleeper crack inspection apparatus according to an embodiment of the present invention.

11 is an operation flowchart of the railroad sleeper crack inspection method according to an embodiment of the present invention.

12 is a diagram illustrating a time domain analysis result in the railway sleeper crack inspection method according to an embodiment of the present invention.

13 is a diagram illustrating a frequency domain analysis result in the railway sleeper crack inspection method according to an embodiment of the present invention.

14 is a view illustrating a wavelet analysis result in the railway sleeper crack inspection method according to an embodiment of the present invention.

<Brief Description of Drawings>

100: railway sleeper crack inspection device

110: PC 120: image acquisition unit

130: driving unit 140: hitting unit

150: sound acquisition unit 210: balance

220: balance transfer unit 230: transfer wheel

300: railway rail 310: concrete railway sleeper

111: control unit 112: display

113: crack analysis unit 113-1: amplifier

113-2: A / D converter 113-3: Comparative analysis unit

113-4: Signal Processing Program

Claims (4)

In the device for inspecting the crack of railway sleepers while being mounted on the trolley, An image acquisition unit for acquiring an image of a railway sleeper to measure a crack; A hitting part such as a hammer that generates vibration by hitting the position of the railroad sleeper according to the acquired image; A driving unit such as a DC motor or a stepping motor for driving the striking unit so that the striking unit can strike the railway sleeper; An acoustic acquisition unit for acquiring a hit waveform generated by the hit and an acoustic waveform according to the vibration of the railway sleeper; And An amplifier configured to compare and analyze a predetermined waveform with the obtained hitting waveform and acoustic waveform to determine whether a crack occurs in the railway sleeper according to the comparison analysis result, the amplifier amplifying the hitting waveform and the acoustic waveform; An analog / digital (A / D) converter for converting the amplified striking waveform and the acoustic waveform into a digital signal; And a crack analysis unit including a comparison analysis unit which determines whether or not the crack is compared with the waveform of a predetermined steady state by comparing the blow waveform and the acoustic waveform converted into the digital signal according to a signal processing program. The hitting position of the hitting portion is a concrete sleeper, the bogie is transported to align the hitting position according to the acquired image, and the bogie is automatically transferred to the next position when no crack occurs in the railway sleeper. Railway sleeper crack inspection device. The method of claim 1, The comparative analysis unit, the railway sleeper crack inspection device, characterized in that for determining whether the crack of the railway sleeper according to the results of the time domain analysis, frequency domain analysis or wavelet (Wavelet) analysis. 3. The method of claim 2, The hitting waveform generated by the hitting is railroad sleeper crack inspection device, characterized in that obtained through the piezo sensor attached to the hitting portion. The method of claim 1, If it is determined by the crack analysis unit that the crack in the railway sleeper, railway sleeper crack inspection apparatus further comprises an accelerometer crack detection sensor for precisely measuring the crack of the railway sleeper.

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