KR20230059659A - Ultrasonic defect inspection system for rail bolt and rail bolt inspection method using the same - Google Patents

Abstract

The present invention relates to ultrasonic inspection of bolts fastened to railway rails. In the present invention, an inclined angle forming wedge block (10) is inserted between an end of the bolt and a probe (25), and a computer (40) equipped with an inspection program is connected to a reception oscillator (20) to which the probe (25) is connected so that bolts in a fastened state can be inspected. Through the present invention, simple and rapid ultrasonic inspection of railway rail bolts is possible, and the reliability of defect inspection results of railway rail bolts can also be ensured.

Description

Railway rail bolt ultrasonic inspection system and railway rail bolt inspection method using the same

The present invention relates to ultrasonic flaw detection of bolts fastened to a railway rail, wherein an inclined angle forming wedge block 10 is inserted between the end of the bolt and the transducer 25, and the number of times the transducer 25 is connected A computer 40 loaded with an inspection program is connected to the oscillator 20 so that it is possible to inspect bolts in a fastened state.

Ultrasonic flaw detection, which is a type of non-destructive inspection, identifies the location and size of discontinuous points in a subject by examining and analyzing the echo or propagation waves of ultrasonic waves incident on the subject. Related prior art includes Patent No. 1216754 can be heard

In inspecting defects such as cracks through ultrasonic flaw detection, the shape of the inspected object is not limited, but accessibility for inspection must be guaranteed, and in particular, appropriate composition of ultrasonic incident conditions according to the inspected area within the inspected object is required.

That is, ultrasonic flaw detection is performed on the premise of direct or indirect contact of the probe 25 that oscillates and receives ultrasonic waves to the test object, so that a remote or distance test inaccessible to the probe 25 is impossible, Temporary examination of the entire area of a large-scale subject is impossible due to limitations in propagation characteristics of ultrasound, signal transmission sensitivity, resolution, and the like.

Therefore, a scan is performed to move the transducer 25 along the surface of the object under test. Scanning is performed by moving the transducer 25 along the outer circumferential surface in the axial direction of the subject.

Patent No. 1216754, which is a prior art related to ultrasonic flaw detection, also inspects rod-shaped or tubular objects, and performs axial scanning of the object. Such axial scanning is applied to various rod-shaped or tubular objects, Even in bolts, which can be referred to as a typical rod-shaped object to be inspected, axial scanning is performed to move the transducer 25 along the outer circumferential surface of the bolt.

Through this axial scan, defects such as cracks or cavities in bolts can be effectively detected, but with bolts in a pre-fastened state, access to the outer circumferential surface is inevitably restricted, so significant inspection results can be expected. There are problems that can't be solved.

That is, in the case of a bolt having only a head and a part of the distal end exposed to the outside, such as a bolt fastened to a railroad rail, the above-described axial scanning is fundamentally impossible, so that a practical ultrasonic defect inspection of the entire bolt is impossible.

In particular, in the case of bolts fastened to railroad rails on which heavy trains run at high speed, not only limited access to a part of the end is possible due to the fastening structure, but also measures to dismantle and separate the bolts from the rail for inspection There was a problem that was practically impossible as the use of the suspension should be preceded.

On the other hand, ultrasonic inspection requires a high level of expertise and skill compared to other non-destructive inspections. This is because different results are derived even for the same defect depending on the shape and material of the inspected object, the manipulation method of the transducer 25, and the like.

Therefore, since inspection and post-processing of inspection results must be performed by skilled inspectors, ultrasonic inspection of large-scale facilities such as railways inevitably requires enormous costs and time. There was a serious problem that different results were derived depending on.

The present invention has been devised in view of the above-mentioned problems, and in a railroad rail bolt ultrasonic inspection system, a transducer in which an oscillator 22 and a transducer 23 are embedded in a transducer 20 that oscillates ultrasonic waves and receives echo waves (25) is connected, and the wedge block 10 is inserted between the end of the railroad rail bolt and the tip of the transducer 25, and the contact surface of the wedge block 10 with the end of the railroad rail bolt and the wedge block 10 The contact surface with the tip of the transducer 25 has an inclination of 2 to 4 degrees, and a computer 40 equipped with an inspection program for processing signals transmitted from the hand oscillator 20 is connected to the hand oscillator 20, and the railway It is a railway rail bolt ultrasonic inspection system characterized in that the inspection database 45 containing the standard information of the rail bolt and the setting information for each standard information is connected to the computer 40.

In addition, in the railway rail bolt inspection method using the railway rail bolt ultrasonic inspection system, when the inspection program loaded in the computer 40 is executed and bolt standard information is input, the inspection program searches the inspection database 45 to open the inspection program. A setting step (S10) of fetching setting information including a start point (Ts), an end point (Te), and a defect criterion (Cd); After is oscillated, a driving step (S20) of generating echo information from the received echo wave by the number oscillator 20 and sending it to the computer 40, and the computer 40 receiving the echo information and the inspection program receiving the echo information. An analysis step of processing the information and storing the presence or absence of a section exceeding the defect criterion (Cd) in the starting point (Ts) to the ending point (Te) in the memory device of the computer 40 as a test result in the echo information ( S30) is a railroad rail bolt inspection method using an ultrasonic rail bolt inspection system.

In addition, in the setting step (S10), when the inspection program loaded in the computer 40 is executed and the standard information of the bolt is input, the inspection program inquires the inspection database 45 to determine the starting point (Ts), the end point (Te), After the setting information including the defect criterion (Cd) and the boundary criterion (Cb) is fetched and the analysis step (S30) is performed, the inspection program processes the received echo information, but after the end point (Te) in the echo information. When there is no section exceeding the boundary criterion (Cb), a warning step (S40) for outputting an abnormal signal is performed.

Through the present invention, it is possible to perform simple and rapid ultrasonic inspection of railroad rail bolts, and reliability of the defect inspection results of railroad rail bolts can also be secured.

In particular, bolts in a fastened state can be inspected without disassembling and separating railroad rail bolts, and the contact point of the transducer 25 can be limited to the end of the bolt, thereby improving inspection convenience and safety.

In addition, computer processing and recording of inspection results are possible, enabling systematic management of inspection history and railroad facility assets.

1 is a hardware configuration diagram of the system of the present invention
Figure 2 is an explanatory diagram of the implementation situation of the present invention
3 is a structural diagram of the system of the present invention
Figure 4 is a partially cut perspective view of one embodiment of the wedge block of the present invention
Figure 5 is a representative cross-sectional view of a railroad rail when the present invention is carried out
6 is an explanatory diagram of ultrasonic oscillation and reception state for each situation of the present invention
7 is an echo signal for each situation of the present invention
8 is an explanatory diagram of the echo signal processing method of the present invention
9 is an exemplary view of a computer screen of the present invention
10 is a flow chart of the present invention
11 is a flowchart of one embodiment of the present invention to which a warning step is applied
12 is a hardware configuration diagram of an embodiment of the present invention in which a smartphone is applied as a computer
13 is an exemplary view of a computer screen of the embodiment of FIG. 12

The detailed configuration and execution process of the present invention will be described through the accompanying drawings.

First, FIG. 1 shows the hardware configuration and connection relationship of the system of the present invention. As shown, the system of the present invention is composed of a transducer 25, a water oscillator 20, and a computer 40. In particular, the transducer At 25, a wedge block 10 is installed to adjust the incident angle of the ultrasonic wave oscillated by the transducer 25 to the subject.

As shown in FIG. 2, in the system of the present invention, in a state where the railroad rail bolts are coupled to the rail, the wedge block 10 is closely attached to the distal end of the bolt exposed to the outside of the rail, and the number oscillator 20 is operated. Therefore, it is possible to inspect bolts for defects without separating them from the rail for ultrasonic inspection.

In particular, the wedge block 10 is inserted between the end of the railroad rail bolt and the tip of the transducer 25, and the contact surface of the wedge block 10 with the end of the railroad rail bolt and the tip of the transducer 25 of the wedge block 10 The contact surface has an inclination of 2 to 4 degrees, and an inclination of 2 to 4 degrees is formed between the central axis of the probe 25 and the central axis of the test subject bolt through the wedge block 10.

As a result, it is possible to inspect only the state in which the wedge block 10 is in close contact with the end of the bolt without scanning the outer circumferential surface of the bolt by the transducer 25, so there is no need to separate the bolt for inspection, as well as the bolt Inspection is possible if only the minimum exposed part of the distal end is secured.

3 is a block diagram showing the function and connection relationship of each component of the present invention. As shown, the oscillator 20 that oscillates ultrasonic waves and receives echo waves includes an oscillator 22 and a transducer 23 ) is connected to the transducer 25, and a computer 40 processing the signal transmitted from the number oscillator 20 is connected to the number oscillator 20, and the computer 40 has standard information and setting information to be described later. An inspection database 45 containing information such as the like is connected.

The number oscillator 20 of the present invention is a device in which an oscillation unit 21, which is an oscillation circuit for oscillating ultrasonic waves, and a reception unit 24, which is an oscillation circuit for receiving echo or propagation waves, are built-in, and the ultrasonic pulser/receiver (ultrasonic pulser/receiver) may be applied.

The transducer 25 connected to the number oscillator 20 is a device for contacting an object under test in which an oscillator 22, which can be referred to as a kind of speaker, and a transducer 23, which can be regarded as a kind of microphone, are mounted together. As shown in FIG. 3, The oscillator 22 of the transducer 25 is connected to the oscillator 21 of the oscillator 20, and the transducer 23 of the transducer 25 is connected to the oscillator 24 of the oscillator 20.

In addition, the number oscillator 20 and the computer 40 are connected by wire or wirelessly to perform data communication. After being converted into a digital signal via the AD converter 30, it is transmitted to the computer 40.

The AD conversion unit 30 may be built in the number oscillator 20, mounted separately outside the number oscillator 20, or installed in the middle of the signal line between the number oscillator 20 and the computer 40 Although not shown in FIG. 3, the oscillator 21 and the receiver 24 or the AD conversion unit 30 are driven and controlled in the frequency oscillator 20, and the generated signals and information are processed. A processor and a memory device may be embedded.

The test database 45 connected to the computer 40 may also be built in the memory of the computer 40 or built in a separate server or storage and connected to the computer 40 through a communication network.

On the other hand, as described above, the wedge block 10 for adjusting the contact angle of the probe 25 is configured between the tip of the probe 25 of the present invention and the end of the bolt, a test subject, a specific embodiment of which is illustrated in FIG. .

The wedge block 10 of the present invention, as in its dictionary meaning, is a wedge-shaped part inserted between the two components, enabling smooth propagation of ultrasonic waves oscillated by the transducer 25 and minimizing distortion. It is desirable that the material be applied.

In the embodiment illustrated in FIGS. 1, 2, 4 and 5, the wedge block 10 is in close contact with the end of the bolt on the rear surface of the wedge block 10 on the drawing, and the front surface on the drawing is the rear surface. As a structure in which an inclined surface 11 is formed on the front part of the wedge block 10 while being inclined, a coupler 15 having a shape matching the tip of the transducer 25 is formed at the center of the inclined surface 11, The front end of the transducer 25 is firmly coupled to the coupler 15.

That is, as shown in FIG. 5, when the wedge block 10 is in close contact with the bolt end in a state in which the transducer 25 is coupled to the wedge block 10, the contact surface of the bolt end of the wedge block 10 and the transducer 25 A predetermined inclination angle (θ) is formed between the coupling surfaces, and thus the same inclination angle (θ) is formed between the central axis of the bolt and the central axis of the probe 25.

Therefore, ultrasonic flaw detection can be performed with the wedge block 10 inserted between the transducer 25 and the end of the bolt, and accordingly, various ultrasonic oscillations and echo scans according to the situation are possible as shown in FIG. 6.

In FIG. 6, the dotted line represents the oscillation ultrasonic wave or the echo wave by the boundary, and the solid line represents the echo wave by the defective part. By inserting between the probe 25 and the end of the bolt, effective defect inspection is possible without moving the probe 25 along the outer circumferential surface of the bolt.

Bolts applied to railway rails can be said to have relatively constant specifications, and generally have a length of 100 mm to 160 mm, and a bolt body bar top has a diameter of 15 mm to 30 mm.

In addition, considering the shape of the railway rail bolt, the load and impact conditions during use, the joint between the head of the bolt and the rod top of the main body or the top of the bolt main body, as shown in FIG. As shown in the figure, the ultrasonic wave oscillated by the transducer 25 is incident at an angle, thereby enabling more effective detection of defects or cracks.

Considering the specifications of the railway rail bolts as described above, that is, the length of 100 mm to 160 mm and the diameter of 15 mm to 30 mm, the inclination angle between the central axis of the bolt formed by the wedge block 10 and the central axis of the transducer 25 (θ ) It is preferable that 2 to 4 degrees are applied.

When the inclination angle (θ) is less than 2 degrees, the ultrasonic waves incident on the bolt, which is the test subject, are incident in a direction close to parallel to the central axis of the bolt, which is disadvantageous in detecting cracks formed on the surface layer of the bolt, that is, a portion close to the outer circumferential surface. , When the inclination angle θ exceeds 4 degrees, noise reflected by the outer circumferential surface of the bolt or the screw thread increases, which is disadvantageous in signal detection.

In particular, as illustrated in FIG. 6, the cracks formed in the railroad rail bolts are mainly formed in the surface layer, and on the outer circumferential surface of the railroad rail bolts in a fastened state, various physical properties including rails are installed in most sections on the bolt end, resulting in a large amount Noise of may be formed, and when ultrasonic waves are incident at an angle above or below the above-mentioned range of inclination angles, inspection precision and reliability may be seriously damaged.

On the other hand, FIG. 7 shows the echo signal collected according to the ultrasonic oscillation and reception conditions for each situation as in FIG. 6, after a single pulse is oscillated by the oscillator 22 of the transducer 25 An echo signal received through the transducer 23 of is shown.

A total of 4 echo wave curves shown in FIG. 7 show the echo waves collected in a total of 4 situations shown in FIG. ) The ultrasonic waves oscillated by the oscillator 22 are immediately received by the transducer 23 of the transducer 25 and the signal reflected from the contact between the wedge block 10 and the bolt end is a synthesized signal, and each echo curve The portion whose amplitude is enlarged at the right end of the middle is the boundary echo reflected from the head of the bolt.

Since the speed of propagation of ultrasonic waves inside the bolt, which is a single material, can be regarded as constant, the starting point of the amplitude expansion part in the echo curve of FIG. 7 can be converted in direct proportion to the position of the discontinuous point that caused the amplitude expansion part. Defects or cracks in bolts can be located.

In particular, the present invention is applied to railroad rail bolts having a standardized form. In the case of bolts of the same standard, the time difference between the amplitude expansion part of the left end and the amplitude expansion part of the right end of the above-mentioned echo wave curve is constant, that is, the distance is constant. appear to be detectable.

With this in mind, the present invention set the initial gate (default gate) in the ultrasonic inspection of rail bolts, thereby enabling accurate and efficient inspection start and end timing, as well as determining whether the inspection is normally performed or not. Confirmation is also possible.

A gate in ultrasonic testing refers to a significant section of the echo wave signal. , it is necessary to set the horizontal axis section on the echo curve corresponding to the section, that is, time, as an initial gate.

Of course, when a defect is found as a result of the echo wave analysis of the initial gate and the corresponding portion is thoroughly inspected, the gate reduced to a section just before or after the defect may be artificially reset.

In the actual implementation of the present invention, the railway rail bolt, which is a test subject, can grasp the standard of the bolt even with the standard information marked on the bolt or the inspector's naked eye, and the above-described initial gate can be set according to the bolt standard.

That is, as shown in FIG. 8, the time at which the ultrasonic pulse is oscillated in the oscillator 22 of the transducer 25 is called the oscillation point To, and then the ultrasonic wave passes through the wedge block 10 and enters the bolt end. One point in time is referred to as the starting point (Ts), and if the point of departure of the bolt head of the ultrasonic waves propagated into the bolt is referred to as the end point (Te), these oscillation points depend on the specifications of the railway rail bolt and the specifications of the wedge block 10 (To), the starting point (Ts), and the ending point (Te) may all be set in advance, and the aforementioned initial gate is set to a section from the starting point (Ts) to the ending point (Te).

Therefore, in the actual inspection through the present invention, by detecting the amplitude expansion part in the propagation section inside the bolt except for the amplitude expansion part near the oscillation point (To), starting point (Ts) or end point (Te), defects or cracks are effectively detected. It can be detected, and when the end point (Te) is reached after the oscillation point (To), that is, when the time from the oscillation point (To) to the end point (Te) has elapsed, a method of automatically ending the test is also applicable.

In particular, in analyzing the received echo wave, by setting the defect criterion (Cd) and the boundary criterion (Cb) as shown in FIG. It is possible to determine whether or not a signal has been detected. In the figure, the amplitude generation section exceeding the defect criterion (Cd) whose upper and lower limits are indicated by dotted lines can be identified as a defect part, and in the same figure, the upper and lower limits are indicated by virtual lines. The point at which the amplitude exceeds the reference Cb can be recognized as a normal discontinuity forming the oscillation point To, the start point Ts, and the end point Te.

The railway rail bolt inspection method of the present invention is an application program installed in the computer 40 and can be performed by an inspection program that processes signals transmitted from the number oscillator 20, and the specific process is shown in FIGS. 9 to 9 11 is shown.

First, FIG. 9 illustrates the screen of the computer 40 on which the present invention is performed. As shown, the signal curve of the echo wave is output to the screen, and the standard information of the bolt and the specifications of the wedge block 10 are displayed. A user interface for inputting information and setting various conditions is provided.

As described above, the computer 40 performing the present invention is loaded with a test program for processing the signal transmitted from the number oscillator 20, and the echo wave transmitted from the number oscillator 20 and input to the computer 40. Signals and the like are analyzed, and FIG. 9 illustrates an execution screen of an inspection program. As shown in FIGS. 1 and 2, the portable computer 40 is applied to the computer 40 equipped with the inspection program, so that the inspection program can be seen in the field. enable the invention to be carried out.

At the same time as the inspection program is loaded in the computer 40 of the present invention, the inspection database 45 is built or connected. In the inspection database 45, standard information and setting information for each standard information of the railroad rail bolt, which is the object to be inspected, are recorded.

The standard information of railroad rail bolts recorded in the inspection database 45 is information indicating the standard such as the length or diameter of the bolt under test. A symbol or character string indicating a may be applied as standard information.

That is, in the present invention, bolt standard information does not mean information listing detailed specifications for actual manufacturing of bolts, but information that can identify a group of bolts having the same standard and another group of bolts having different standards. can do.

In addition, the setting information included with the standard information in the inspection database 45 is information corresponding to the standard information, and the starting point (Ts), the ending point (Te), the defect criterion (Cd) and the boundary described with reference to FIG. The criterion Cb and the like are included in the setting information.

However, the setting information, in particular, the starting point (Ts) may vary according to the specifications of the wedge block 10, and when a single wedge block 10 is applied regardless of the specification of the bolt, the setting information is the specification information of the bolt However, in the case of a test in which a specific wedge block 10 is selected and applied among wedge blocks 10 having various dimensions, the specification information of the wedge block 10 is also stored in the test database 45. It is included together, and the setting information is changed according to the specification information of the bolt and the specification information of the wedge block 10.

That is, as the wedge block 10 of various specifications is applied, the inclination angle θ formed by the wedge block 10 or the distance between the tip of the bolt and the tip of the probe 25 formed by the wedge block 10 is In case of change, since the aforementioned start point (Ts), end point (Te), defect criterion (Cd), and boundary criterion (Cb) may be changed, the combination of bolt standard information and specification information of the wedge block 10 It is necessary to record the setting information differently set according to the inspection database (45).

As shown in FIG. 10, in the railway rail bolt inspection method using the ultrasonic inspection system of the present invention, when the inspection program loaded on the computer 40 is executed and the bolt standard information is input, the inspection program checks the inspection database 45. It begins with the setting step (S10) of fetching setting information including the start point (Ts), end point (Te), and defect criterion (Cd) by inquiry.

As described above, when a plurality of wedge blocks 10 of different specifications are applied, in the setting step (S10), the specification information of the wedge block 10 is input together, and the standard information of the bolt and the wedge block 10 Setting information corresponding to the specification information of is fetched.

On the other hand, after the setting step (S10) is performed, the water oscillator 20 is operated and ultrasonic waves are oscillated by the transducer 25 of the water oscillator 20, and then the water oscillator 20 utilizes the received echo wave signal to generate an echo. A driving step (S20) of generating and sending information to the computer 40 is performed.

The actual process of the driving step (S20) is performed by the number oscillator 20 and may be performed independently of the setting step (S10), but for rapid and stable subsequent processing of the signal transmitted from the number oscillator 20, After the setting step (S10), the driving step (S20) is performed, or after the setting step (S10) is first performed while the operating state of the water oscillator 20 is maintained, the echo information transmission of the driving step (S20) proceeds. it is desirable to be

The echo information transmitted to the computer 40 in the driving step (S20) is digital information in which the waveform of the echo wave, that is, the amplitude at each time is recorded, and is connected to the receiver 24 of the number oscillator 20 as shown in FIG. It is generated or converted by the AD conversion unit 30.

Thereafter, the computer 40 receives the echo information and the inspection program processes the received echo information, and in the echo information, the section exceeding the defect criterion Cd within the starting point Ts to the ending point Te. An analysis step (S30) of storing the existence or nonexistence of the test result in the storage device of the computer 40 is performed, thereby completing a single test for a single test subject, and repeating the above-described process for a single test subject to carry out a detailed test. Multi-point inspection is performed by performing the test or repeating it on other subjects.

In this analysis step (S30), as shown in FIG. 8, the occurrence section of the amplitude exceeding the defect criterion (Cd) within the initial gate (default gate) section set to the section from the start point (Ts) to the end point (Te) is detected. By doing so, it is possible to determine whether a defective part exists, determine a time point of amplitude expansion formed due to the corresponding defective part, and calculate the location of the corresponding defective part based on this time point.

On the other hand, in the present invention, it is possible to confirm whether or not the test is normally terminated by utilizing the aforementioned boundary criterion (Cb), and the specific process is shown in FIG. 11 .

That is, by detecting whether the amplitude enlargement formed by the head of the bolt occurs immediately after the end point (Te) preset by the standard information of the bolt, as shown in FIG. At this time, in the setting step (S10), the boundary criterion (Cb) is set together, and in addition to the execution of the analysis step (S30), it is checked whether there is an amplitude expansion portion exceeding the boundary criterion (Cb) after the end point (Te). is to do

Therefore, in the embodiment of FIG. 11, in the setting step (S10), the inspection program loaded in the computer 40 is executed, and when the standard information of the bolt is input, the inspection program searches the inspection database 45 to determine the starting point (Ts). , end point (Te), defect criteria (Cd), and boundary criteria (Cb) are retrieved, and after the analysis step (S30) is performed, the inspection program processes the received echo information, but the echo information If there is no section exceeding the boundary criterion Cb after the end point Te in , a warning step (S40) of outputting an abnormal signal is performed.

The meaning that the abnormal signal is output in the warning step (S40) means that the amplitude expansion part exceeding the boundary standard (Cb) is not formed after the end point (Te), and it can be considered that the normal propagation of the ultrasonic waves has not been made. Preferably, the test results are discarded.

Meanwhile, FIGS. 12 and 13 are examples in which a mobile information device such as a smart phone is applied as a computer 40 that processes echo information, etc. in the present invention. As performance comparable to is given, the inspection program is loaded as an application program of the smartphone operating system, and the frequency oscillator 20 is equipped with a wireless adapter 49 such as a Bluetooth dongle as shown in FIG. , It is possible to perform the present invention through wireless communication between the number oscillator 20 and the computer 40, which is a mobile information device.

As such, in the embodiment of the present invention to which a mobile information device is applied as the computer 40, as shown in FIG. 13, the test program can be executed through the user's touch screen manipulation or gesture input, and further enhanced portability. Inspection convenience can also be dramatically improved.

Through the present invention as described above, simple and rapid ultrasonic inspection is possible without separation of the railroad rail bolts, and systematic and precise inspection management is possible by computerizing the inspection process.

10: wedge block
11: slope
15: coupler
20: water oscillator
21: oscillation part
22: oscillator
23: examiner
24: reception department
25: probe
30: AD conversion unit
40: computer
45: inspection database
49: wireless adapter
S10: Setting stage
S20: driving step
S30: analysis step
S40: warning step

Claims (3)

In the railway rail bolt ultrasonic inspection system,
A transducer 25 having an oscillator 22 and a transducer 23 is connected to the transducer 20 that oscillates ultrasonic waves and receives echo waves;
The wedge block 10 is inserted between the end of the railroad rail bolt and the tip of the transducer 25, and the contact surface of the wedge block 10 with the end of the railroad rail bolt and the tip of the transducer 25 of the wedge block 10 The contact surface is inclined at 2 to 4 degrees;
A computer 40 loaded with a test program for processing signals transmitted from the number oscillator 20 is connected to the number oscillator 20;
Railway rail bolt ultrasonic inspection system, characterized in that the inspection database (45) containing the standard information of the railway rail bolt and setting information for each standard information is connected to the computer (40).
In the railway rail bolt inspection method using the railway rail bolt ultrasonic inspection system of claim 1,
When the inspection program installed in the computer 40 is executed and bolt standard information is input, the inspection program searches the inspection database 45 to set the starting point (Ts), end point (Te), and defect criteria (Cd). A setting step of fetching information (S10);
After the hand oscillator 20 is operated and ultrasonic waves are oscillated by the transducer 25 of the hand oscillator 20, the hand oscillator 20 generates echo information with the received echo wave and transmits it to the computer 40. S20) and;
The computer 40 receives the echo information, and the inspection program processes the received echo information, and determines whether there is a section exceeding the defect criterion Cd within the starting point Ts to the ending point Te in the echo information. A railway rail bolt inspection method using a railway rail bolt ultrasonic inspection system, characterized in that it consists of an analysis step (S30) of storing the inspection result in the storage device of the computer 40.
The method of claim 2,
In the setting step (S10), when the inspection program loaded in the computer 40 is executed and the standard information of the bolt is input, the inspection program searches the inspection database 45 to determine the starting point (Ts), the ending point (Te), and the defect criteria ( Retrieve setting information including Cd) and boundary criterion (Cb);
After the analysis step (S30) is performed,
The test program processes the received echo information, but if there is no section exceeding the boundary criterion (Cb) after the end point (Te) in the echo information, a warning step (S40) of outputting an abnormal signal is performed. Railway rail bolt inspection method using an ultrasonic inspection system for railway rail bolts.

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