JPH01299456A - Ultrasonic wave flaw detector - Google Patents

Abstract

PURPOSE:To output the state of defect distribution in the entire body to be inspected readily and highly accurately, by scanning the specified part of the surface of the body to be inspected with an ultrasonic wave beam, collecting and recording flaw data, and outputting the result of operation. CONSTITUTION:An array type probe 1 is brought into contact with the surface of a body to be inspected. Ultrasonic flaw detection is performed with an electronic scanning means 11. The data of the amplitude and the propagating time of an ultrasonic echo for every electronic scanning position are detected with an ultrasonic wave signal collecting and recording means 13. Based on these data, the positional relationship between the position of the probe 1 and the position of the specified shape part of the body to be inspected is operated in an operating means 14. The electronic scanning position of a monitor line and a beam path for monitoring the contact state between the probe 1 and the body to be inspected are determined. Based on the determined monitor line and a flaw detecting line, the direction of the ultrasonic wave beam and the focusing position are set again, and the flaw detection is performed. The echo data at that part are collected and recorded as the flaw detection data. The means 14 performs operation in order to determine whether the data agree with defect judging conditions or not. When the data agree with the conditions, the data are outputted to the outside though an output means 15.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an ultrasonic flaw detection device that uses ultrasonic waves to detect the position, size, distribution, etc. of defects inside objects such as metal materials. In particular, the fitting part between the turbine disk and the turbine blade,
The present invention relates to an ultrasonic flaw detection device that is most suitable for inspecting defects that occur in so-called turbine disk side blade implants.

(Prior art) In conventional A-scope flaw detection, ultrasonic flaw detection of a blade implanted part, which is a fitting part between a turbine disk and a turbine blade, is made up of protrusions and recesses that are intricately inserted into the test object. Because it is difficult to distinguish between echoes due to the shape of the object and defective echoes, recently, an ultrasound beam is scanned inside the object, and a B-scope of the cross section of the object corresponding to the ultrasound beam scanning surface is displayed. Attempts are being made to detect flaws.

One such attempt is an ultrasonic flaw detection device that uses an array type probe 1 as shown in FIG. The array type probe 1 of this ultrasonic flaw detection device has a large number of ultrasonic transducers 2 arranged in a straight line. The ultrasound beam 3 is focused and deflected by shifting the ultrasound transmission/reception timing of each selected ultrasound transducer by a predetermined time and controlling the phase of the ultrasound transmission/reception signal. This is to perform scanning.

Therefore, if such an array type probe 1 is used, the main beam 3 of the transmitted and received ultrasonic waves can be directed to the blade embedded portion 6 of the turbine disk 4 in which the turbine blade 5 is embedded, for example, as shown in FIG. By scanning the flaw detection area in a fan shape,
B scope 7 compatible with electronic scanning of turbine disk 4
is displayed as shown in FIG. 9, and the shape echo of the blade implanted portion 6 and the defective echo F are identified by the image pattern of the B scope 7.

Furthermore, an attempt was made to set a window 8 for the B scope shown in FIG. 9(b) in an area that includes the virtual defect position, and to selectively display only the echoes within those windows. It is being

(Problem M to be Solved by the Invention) According to such a conventional ultrasonic flaw detection device, the cross section of the blade implanted part, which is the fitting part between the turbine disk and the turbine blade, at any arbitrary array probe position can be detected. It is possible to display the B-scope image in real time and easily distinguish and judge the shape echo of the blade implantation portion and the defective echo from the image. However, when the array probe is mechanically scanned to inspect the blade implantation part of the entire turbine disk, it is difficult for the operator to distinguish between shape echoes and defective echoes from the sequentially changing B-scope images. It's the fate of the country, and it's also inefficient.

Furthermore, when using a computer to process the images of the B scope and use a computer to distinguish between shape echoes and defective echoes, a large amount of image data must be handled, which impairs high speed and results in an increase in inspection time. . Therefore,
By setting a window to the virtual defect position, flaw detection is performed by monitoring the echo within the window, but this may be affected by the positional accuracy of the array type probe and fluctuations in the echo level within the window due to the state of contact with the object. Therefore, problems arise in that sufficient flaw detection accuracy cannot be obtained.

In order to solve the above-mentioned problems, the present invention has been developed to easily detect defect echoes without sacrificing high speed when inspecting defects in the blade implantation part of a turbine disk where the protrusions and recesses of the test object are intricately intertwined. This makes it possible to detect defects separately from shape echoes, and minimizes the influence of echo level fluctuations due to the contact state of the probe by monitoring the echo level of specific shaped parts, making it easy and highly accurate to determine the defect distribution status of the entire object. The purpose is to provide an ultrasonic flaw detection device that can output.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention detects defects occurring inside the object by bringing a probe into contact with the outside of the object as shown in the block diagram shown in FIG. In ultrasonic flaw detection equipment,
Using an array type probe 1 in which transducers 2 capable of transmitting and receiving ultrasonic waves are linearly arranged inside the probe, an ultrasonic beam 3 is electronically scanned in the transducer array direction into the inside of the subject. A scanning means 11, a mechanical scanning means 12 for phasing the array probe 1 on the surface of the object, an electronic scanning position, a mechanical scanning position, and the amplitude and propagation of ultrasonic echoes from inside the object at these scanning positions. Ultrasonic signal acquisition means 13 detects time (or beam path) information and collects it as flaw detection data, and arithmetic processing means 14 performs arithmetic processing using this information.

An ultrasonic flaw detection apparatus is provided which includes an output means 15 for outputting flaw detection results obtained through arithmetic processing.

(Function) In the device configured in this way, firstly, the array type probe 1 is brought into contact with the relevant part of the subject, and the electronic scanning means 11 performs ultrasonic flaw detection, and the The amplitude and propagation time (or beam path) information of the ultrasonic echoes are detected by the ultrasonic signal acquisition means 13, and the positional relationship between the array type probe position and the position of the specific shaped part of the subject is calculated from this information. The processing means 14 calculates and determines the electronic scanning position and beam path of a monitor line for flaw detection of a specific shaped part in order to monitor the contact state of the array probe 1 with the subject. Furthermore, the arithmetic processing means 14 calculates in advance the electronic scanning position at which flaw detection is optimal at a position where a defect is expected to occur, and determines this as a flaw detection line. Then, based on the second determined monitor line and flaw detection line, the ultrasonic beam direction and focus position are reset,
The electronic scanning means 11 detects flaws in the relevant part, collects echo information from the relevant part as flaw detection data for each mechanical scanning position, and determines whether or not the echo information matches preset defect judgment conditions. The calculation is performed by the calculation processing means 14, and the result is added to the collected flaw detection data as a status. Further, if the defect determination conditions are met, the output means 15 notifies the outside. In this manner, the entire test object is flaw-detected, arithmetic processing is performed based on the collected flaw-detection data and status information, and a report of the flaw-detection results is outputted by the output means 15.

Thirdly, from this flaw detection result, a mechanical scanning position that matches the defect determination conditions is determined, and the mechanical scanning means 12 determines the mechanical scanning position.
The hair array and type probe 1 are moved to that position, the electronic scanning means 11 is reset, and the cross section of the object is electronically scanned and a B scope image is displayed to perform detailed flaw detection.
The ultrasound echo amplitude and beam path information for each electronic scanning position are detected by the ultrasound signal acquisition means 13, and from this information, the positional relationship between the array type probe and the specific shaped part is calculated by the calculation processing means 14. Based on the result, the echo source of the acquired ultrasound signal is calculated, and the echo source of the area where the defect is expected to occur is output by the output means together with the shape of the object.

Therefore, the series of operations described above is characterized in that highly accurate AM can be easily performed without impairing high speed.

(Embodiment) An embodiment of the ultrasonic flaw detection apparatus according to the present invention will be described with reference to FIGS. 2 to 7. FIG. 2 is a diagram for explaining the flaw detection of the blade-embedded portion of a turbine disk using the ultrasonic flaw detection device of the present invention. In the turbine rotor 20, a large number of disk-shaped turbine disks 4 are shrink-fitted in the axial direction. It is fitted.

A complex dovetail structure (referred to as a blade implant) is formed on the outer periphery of the turbine disk 4, and a large number of turbine blades 5 are fitted into this blade implant. In this state, it is placed horizontally on a set of rotating frames 21,
One of the rotating frames 21 is configured so that a turbine rotor can be rotationally driven via a rotating roller 22 by an internal motor, and the other is supported only by the rotating roller 22. Furthermore, starting, stopping, and rotation direction of the rotation drive of the rotating frame 21.

Needless to say, consideration has been given to making it easy to adjust the rotational speed. Further, a position detector 23 such as a rotary encoder is installed at the shaft end of the turbine rotor 20, and the position detector 23 is configured to obtain the amount of rotational movement of the turbine rotor 20. Further, a support rod 24 for fixing a probe holding mechanism 30 for abutting the array type probe 1 is attached to the side surface of the blade implantation part 6, which is the fitting part between the arbitrary turbine disk 4 and the turbine blade 5. A movable trolley 25 is disposed below the turbine rotor 20. The mobile cart 25 has wheels 2 on the cart frame so that it can be easily moved and fixed on the floor.
The configuration of the probe holding mechanism 30 will now be described with reference to FIG. The array type probe 1 is fixed by a holder 31 for attachment to a holding mechanism 30. Rotatable pin joints 32 are attached to both ends of the holder 31.
Two shafts 34,35 are connected via 33. Furthermore, these two shafts 34, 35 are connected to slide bearings 36, 37 that can slide in the axial direction, and coil springs 38, 39 are attached so that force is generated when pressing against the array type probe 1. has been done. Here, the slide bearing 36 on one shaft is fixed to a slide shaft 40 for probe position adjustment in a direction perpendicular to the slide bearing 36. The other slide bearing 3
7 is connected to the probe position adjustment slide shaft 40 by a rotatable pin joint 41. Further, the slide shaft 40 for adjusting the probe position is connected to a slide bearing 42 fixed to the tip of the support rod 24 fixed to the movable cart 25, and the array type probe 1 is attached to the side surface of the turbine disk 4.
This allows for close contact. The array type probe 1 and the coil springs 38 and 39 are configured to be easily replaceable.

Next, with reference to FIG. 4, the configuration of the main body of an ultrasonic flaw detection apparatus for transmitting and receiving ultrasonic waves using the above-mentioned array type probe will be described. Inside the array type probe 1, a large number of transducers 2 capable of transmitting and receiving ultrasonic waves are arranged in a linear manner, and each transducer 2 has an ultrasonic transmitter group 51 that generates a transmission pulse, and an ultrasonic receiver group 51 that generates a transmission pulse. It is connected to the device group 52.

This ultrasonic transmitter group 51 selects all or several transmitters according to the pulse generation trigger signal from the delay setter 53, sends a transmission pulse to each corresponding transducer 2, and vibrates in response. Child 2 transmits ultrasonic waves. The transmitted ultrasonic waves are reflected inside the subject and reach the transducer 2. This transducer 2 generates an electrical signal corresponding to the change in the sound pressure of the ultrasonic wave and also has a receiving function, so that the received signal detected by each transducer 2 is transmitted to the corresponding ultrasonic receiver group 52. After being amplified, each signal is input to the corresponding A/D converter 54.

This A/D converter 54 converts an ultrasonic signal into a digital signal at high speed, and can faithfully convert a received waveform into a digital quantity. Further, a trigger signal for starting digital conversion of the received signal is sent to the A/D converter 54 by the delay setter 5.
3 are supplied respectively. All or some of the A/D converters 54 that receive this trigger signal convert the ultrasonic reception waveform into a digital signal in synchronization with the input time of the trigger signal. The signal controller 55 selects a group of transducers involved in transmitting and receiving ultrasonic waves for the delay setter 53, and adjusts the trigger signal output according to the preset ultrasonic beam transmitting and receiving directions and focusing distance. Give timing.

Further, the outputs of each A/D converter 54 are subjected to digital waveform addition and stored in an addition memory 56. That is, A/D
The digital waveform of the ultrasonic reception signal once held in the converter 54 is digitally added to the reception signal of the transducer group 2 selected at the time of ultrasonic reception, and stored at the same time as the digital waveform. These controls are controlled by a signal controller 55.

The received waveform added in the addition memory 56 is sent to the signal processor 57.
is input. The signal processor 57 detects this added waveform, converts it into a detected waveform, and outputs a sweep signal to a display 58 such as a CRT based on the ultrasonic transmission/reception positions and directions set in advance by the signal controller 55. . At this time, a detected waveform is also output in synchronization with the sweep signal, and the sweep signal is subjected to one-degree brightness modulation. In this way, the signal controller 5
5, by sequentially changing the direction of the ultrasonic beam and repeating it, it becomes possible to electronically scan the inside of the object, and the B scope corresponding to the scanned cross section is displayed on a display 58 such as a CRT so that it can be monitored. .

The signal controller 55 also has a gate function and is configured to detect the peak amplitude value and propagation time of the ultrasonic reception waveform having a predetermined signal level or higher within the gate and output it to the data acquisition device 59. . Furthermore, the data acquisition device 59 is configured so that it can also acquire the entire waveform of the ultrasonic reception signal. - the force signal controller 55 is connected to the turbine rotor 20;
It receives the output from the position detector 23 that detects the amount of rotational movement of the ultrasonic beam, and outputs the ultrasonic beam transmission position and ultrasonic beam direction data to the data acquisition processing device 59. The data acquisition processing device 59 stores the peak amplitude value and propagation time data input from the signal processor 57 and the ultrasound beam transmission/reception position and ultrasound beam direction data input from the signal controller 55 in a predetermined storage area. .

The data acquisition processing device 59 is constituted by a computer with high-speed calculation function, and is programmed to
It is possible to perform arithmetic processing on the aforementioned data stored in a predetermined storage area at high speed, and output the results to an output device 60 such as a CRT or printer. Furthermore, the configuration is such that the direction of the ultrasonic beam, the wave transmitting/receiving position, the gate position, etc. can be reset by a program based on the above-mentioned calculation results.

In this way, the ultrasonic flaw detection equipment shown in Figs. 2, 3, and 4 uses an array type probe in contact with the side surface of the blade implantation part of the turbine disk while rotating the turbine rotor. It is configured so that an ultrasound beam can be electronically scanned, and the obtained ultrasound echoes can be collected and processed arithmetic.

Next, the operation when flaw-detecting the blade implantation portion of the turbine disk using the ultrasonic flaw detection device having the above-mentioned configuration will be explained according to the flowchart shown in FIG. 1st step S
As shown in FIG. 2, □ moves the movable cart 25 to which the array type probe 1 is attached below the turbine rotor 20 placed horizontally on the rotating pedestal 21, and the array type probe 1 The position of the movable trolley 25 is adjusted so that it comes into contact with the side surface of the blade implantation part of the turbine disk 4 to be roughly inspected, and is fixed by the stopper 28. Roughly, after setting the position of the array type probe 1, loosen the fixing screw 43 that fixes the probe adjustment slide shaft 40 as shown in FIG. It is fixed with an adjustment screw 43 so that it comes into contact with a predetermined position of the blade implantation part.

At this time, as the slide shaft 40 for adjusting the probe position moves up and down, the slide shafts 34 and 35 of the arms connected at both ends of the array type probe 1 are moved to the sides of the vane implantation part by the coil springs 38 and 39. Because it receives the force of pressure from the blade, it always slides on the side surface of the blade implant in close contact. Therefore, the array type probe 1 can be easily aligned, and a good contact state can be maintained even when the turbine rotor 20 rotates. In the second step S2, an ultrasonic beam is scanned in a fan shape from the array type probe 1 that is in contact with a predetermined position to display the B scope of the blade implanted part, and the echo of the specific shape part is recognized and the standard flaw detection of the next step is performed. We will set the flaw detection conditions for the specific shape part echo L! The identification and flaw detection conditions are set as follows. That is, the signal controller 55 sets the transmission and reception timing of each transducer group 12 of the array probe 1 in the delay time setting device 53 so that the ultrasonic beam 3 from the array probe 1 is directed in the θ direction. As shown in FIG. 6, the ultrasonic beam direction O is sequentially changed to perform fan-shaped scanning, and the received ultrasonic reception signal is sent to a display device such as a CRT using a signal processor 57. 58, a B scope corresponding to door-shaped scanning of the ultrasonic beam is displayed. At this time, the B slow 1 display displays the echo of a specific shaped part of the blade implantation part, as shown in Fig. 7.

The operator sets a window 8 on the signal processor 57 to encompass those echoes. When this window 8 is set, the signal processor 57 outputs the amplitude and beam path length of the echo within this window 8 to the data acquisition processing device for each ultrasonic beam deflection angle. When the data acquisition of all echoes within the window is completed, the data acquisition processing device 59 calculates the ultrasonic beam deflection angle θ and peak value at which the echoes from the specific shape part within the window are maximum, and the beam path Q thereof. Detect. When the ultrasonic beam deflection angle θ and beam path Q of the peak values of the echoes within each window are detected, since the shape of the blade implantation part is arbitrary, the ultrasonic wave of the array type probe 1 is geometrically determined. The sound wave beam incident point O can be easily calculated by the calculation processing section in the data acquisition processing device 59. Furthermore, once the ultrasonic beam incident point Q of the array type probe 1 is determined, the position where the structural defect of the blade implantation occurs is a specific position and has been determined in advance. It is also possible to easily calculate the ultrasonic beam direction θ and the focusing distance f for flaw detection with an optimal ultrasonic beam.

In this way, a monitor line is established to detect defects in B workpiece #821B3, which is a part with a specific shape, and monitor the fluctuation of the echo amplitude to monitor the contact state of the array type probe 1 with the test object. The expected position F1. F.

The data acquisition and processing device makes it possible to automatically determine the flaw detection line for flaw detection F. Furthermore, regarding the monitor line, 81. R2, B, the gate position for adding a gate on the beam path where the echo is detected, and F from the expected defect position of the flaw detection line.
l, F,, F, the gate position for adding a gate on the hull beam path where the echo is detected and the gate on the beam path where the B□T821B3 echo of the shape part affected by the defect occurrence is detected. The two gate positions for the two gates are also automatically determined.

Next, in the third step S, based on the automatically determined flaw detection conditions of the monitor line and the flaw detection line, the signal controller 55 controls the transmission/reception direction and focusing position of the ultrasonic waves, as well as controlling the received ultrasonic signal. 41!514 deep flaws are performed by detecting the in-gate peak value and beam path and collecting flaw detection data in the data acquisition processing device 59. This standard flaw detection is performed by operating the rotary mount 21, rotating the turbine rotor 20, and emitting ultrasonic waves using the array type probe 1 that comes into contact with the side surface of the turbine disk blade implant part at every predetermined movement distance using the position detector 23. Transmission and reception are performed to collect flaw detection data. At this time, check whether the amplitude value of the specific shaped part B1°B, B3 echo on the monitor line is within the predetermined tolerance range, and whether the amplitude value of the F process 1F2tF3 echo at the expected defect position on the flaw detection line is in advance. Although the preset level has been exceeded, the data acquisition processing device 1E59 checks whether the amplitude values of the shape portions B, l B2 p, and B3 echoes of the same flaw detection line have become lower than the preset level, and the results are displayed. It is recorded together with the flaw detection data, and simultaneously outputted for monitoring by the output device 60. In other words, a defect is determined if the amplitude change of the monitor line echo is within the allowable range and if the flaw detection line F□
When the 1F21F3 echo is larger than the set level, a defect is detected and 8. of the flaw detection line is detected. , B2. When the B3 echo is smaller than the set level, the defect is considered large, and when the FulF21F3 echo of the flaw detection line is below the set level, B1
．． B. When the echo is larger than the set level, there is no defect, and the monitor line 8. , B2. B3
When the echo is below the set level, F, 1F2 of the flaw detection line
1F] Echo and B11B21B, it is determined that normal detection was not performed regardless of the echo.

It is also possible to use this judgment result during standard flaw detection as a command signal for marking the defect position on the object to be inspected. In this way, the position of the blade implantation part of the turbine disk 4 of the object is tested using the ultrasonic beams of the multiple monitor lines and the flaw detection line, and the flaw detection data for each predetermined probe position is collected to perform standard flaw detection. end.

Next, in the fourth step S4, the data acquisition processing device 59 maps the flaw detection data obtained by the standard flaw detection in the circumferential direction of the turbine disk blade implantation part through arithmetic processing, and displays a pseudo C scope on the output device 60. This allows the standard flaw detection results to be visually captured. It goes without saying that a hard copy and a numerical output of the flaw detection data can be obtained if necessary.

By outputting this standard flaw detection result, the operator can easily determine the position of the blade implantation part where the next step of precision flaw detection is to be performed, together with the above-mentioned defect determination result.

In the next fifth step S, precision flaw detection is performed by fan-shaped scanning of the blade implantation part at an arbitrary position in the circumferential direction of the turbine disk 4.1 Normally, the position is standard flaw detection and detection of defects is recognized according to the defect judgment standard. The test is carried out at the location where the test was performed.

In this precision flaw detection, flaw detection is performed by sequentially deflecting the ultrasonic beam deflection angle and scanning in a fan-shaped manner in the same way as when setting the flaw detection conditions described above.
It is displayed on 8. The operator can perform flaw detection while observing this B scope and collect the flaw detection data at that position in the data acquisition processing device. At this time, data is collected by collecting ultrasound reception waveforms for each ultrasound beam deflection angle, making offline data analysis possible.

Then, in the sixth step SG, the flaw detection data acquired by the precision flaw detection is displayed in color by the data acquisition processing device 59 with the ultrasonic echo height along with the blade implantation position.
Performs arithmetic processing such as scope mapping and three-dimensional display expressed by ultrasound beam direction, beam path, and echo height. The flaw detection results are then output to the output device 60 and recorded.

The flaw detection is completed by creating a report of the position of the turbine disk blade implant along with recording the standard flaw detection results.

As explained above, in this example, the probe holding mechanism and rotor rotation mount that can perform flaw detection by contacting the array type probe against the side surface of the blade implantation part of the turbine disk while rotating the turbine rotor are easily constructed. In addition, the ultrasonic beam incident point position of the probe is calculated and calculated from the echo from the shaped part of the blade implanted part obtained by electronic scanning using an array type probe, and further, Through calculation processing, the optimal ultrasonic beam conditions for the expected defect location can be determined.
By setting automatically, it is possible to detect flaws in the blade implanted area using the minimum amount of ultrasonic beams. Furthermore, the ultrasonic echoes detected by those ultrasonic beams are monitored, and the combination of amplitude changes of these ultrasonic echoes is compared with preset defect criteria to easily determine the flaw detection status and defect detection status. Based on the results, detailed precision flaw detection is also carried out, making it possible to perform efficient flaw detection without reducing inspection accuracy.

In this example, the case was explained in which the array type probe was brought into direct contact. However, depending on the shape of the turbine disk, it may be possible to conduct the measurement by using an ultrasonic propagation medium such as an acrylic shoe with the array type probe. Although necessary, the propagation path of the ultrasonic wave can be calculated geometrically, and this can also be applied to this embodiment.

Furthermore, it goes without saying that the present invention can be applied by changing a part of the configuration or the scanning method of the ultrasonic beam without departing from the spirit of the present invention. For example, a mechanical scanning means for rotationally driving a turbine rotor by bringing an array type probe into contact with the side surface of a blade implantation part of a turbine disk, a means for electronically scanning an ultrasonic beam using the array type probe, and an electronic A means for detecting and collecting information such as the amplitude and propagation time of the ultrasonic echo from inside the blade implant at the scanning position and the mechanical scanning position, and a calculation process using such information to predict the blade implant. In order to detect the defect position, the optimal minimum ultrasonic beam is reset and the defect is detected by a combination of amplitude changes of multiple ultrasonic echoes from the blade implanted part. Since the sonic flaw detection device is configured, defects can be detected extremely stably with minimal electronic scanning of ultrasonic beams, and there is an advantage that the defect position and distribution of the entire turbine disk blade implant group can be easily known. . Furthermore, since precise flaw detection can be easily carried out on the defect location and on the blade implanted part of a specific part, the reliability of the flaw detection results is further improved, and it is extremely useful for inspection during periodic plant inspections.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the overall configuration of an ultrasonic flaw detection device according to the present invention, FIG. 2 is an explanatory diagram of a mechanical scanning means of an ultrasonic flaw detection device showing an embodiment of the present invention, and FIG. An explanatory diagram of the holding mechanism for the array type probe of the flaw detection device, Fig. 4 is a block diagram illustrating the main body of the ultrasonic flaw detection device that performs ultrasonic flaw detection using the array type probe, and Fig. 5 shows the ultrasonic flaw detection. 1 is a flowchart of a flaw detection method for a turbine disk blade implanted portion using a device. Figures 6 and 7 are explanatory diagrams of flaw detection of a turbine disk blade implanted part using an ultrasonic flaw detector, Figure 8 is an explanatory diagram showing a conventional ultrasonic flaw detector, and Figure 9 is an explanatory diagram of B by electronic scanning. FIG. 3 is an explanatory diagram of scope display. 1... Array type probe 2... Vibrator 3... Ultrasonic beam 4... Turbine disk 5... Turbine blade 6... Vane implantation part 7... B scope
8...Window 11...Electronic scanning means 12
... Mechanical scanning means 13 ... Ultrasonic signal acquisition means 14
...Arithmetic processing means 15...Output means 20.
... Turbine rotor 21 ... Rotating frame 23
...Detector 24...Array type probe support rod 25.
...Moving trolley 30...Array type probe holding mechanism 31...Array type probe holder 32, 33.34...Pin joints 34, 35.40...Slide shafts 36, 37. 42...Slide bearings 38, 39...Coil springs 51...Ultrasonic transmitter group 52...Ultrasonic receiver group 53...Delay setting device 5
4... A/D converter 55... Signal controller 56.
... Addition memory 57 ... Signal processor 58 ...
Display device 59...Data acquisition processing device 60...
・Output bag [F...Defect G...Gate position B...Specific shape part O...
Ultrasonic beam incident position θ...Ultrasonic beam direction...Ultrasonic beam path P...Ultrasonic echo level Agent Patent attorney Nori Chika Ken Yudo Daishimaru Kento's wife Figure 3 Figure 5 Figure 5 ”-A-direction 0 Fig. 7

Claims (1)

[Claims] (1) In an ultrasonic flaw detection device that detects defects inside the test object by bringing a probe into contact with the outside of the test object and transmitting and receiving ultrasonic waves from the probe to the inside of the test object, an electronic scanning means for electronically scanning an ultrasound beam in the transducer arrangement direction using an array type probe in which a large number of ultrasonic transducers are arranged in a linear manner; an electronic scanning position, a mechanical scanning position, and an ultrasonic signal acquisition means for detecting and collecting the amplitude and beam propagation information of an ultrasound echo from inside the subject at those scanning positions; An ultrasonic flaw detection apparatus comprising: arithmetic processing means for performing arithmetic processing using preset object shape information; and an output means for outputting flaw detection results obtained by the arithmetic processing.