An automatic flaw detection method and device based on ultrasonic wave

Abstract

The present invention discloses an automatic flaw detection method based on ultrasonic wave and its device, the method comprising the following steps: measuring the size of the detected object, including length, width, height / thickness; setting a coordinate origin and establishing a coordinate axis about the detected object; using an ultrasonic flaw detector to scan the detected object, obtaining the peak length of the ultrasonic wave and the duration from ultrasonic wave emission to reception, and recording the movement route of the ultrasonic flaw detector; judging whether there is a defect according to the parameters obtained in step S200; locating the specific position of the defect according to the movement route data of the ultrasonic flaw detector, marking the position of the defect, and transmitting the position data of the defect back to the mobile device. According to the measurement data of the ultrasonic flaw detector, the peak height and the duration from ultrasonic wave emission to reception under different conditions are calculated and compared, and then the type of defect is judged, so as to achieve the purpose of accurately determining the defect type.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic detection, and in particular to an automatic flaw detection method and device based on ultrasonic waves. Background Art

[0002] Ultrasonic testing technology is a non-destructive testing method. It is based on the principle of acoustics and obtains information about the object being tested through the propagation and reflection of sound waves inside the object. Ultrasonic testing technology is a non-destructive testing technology that uses the characteristics of ultrasonic waves to detect, locate and evaluate defects inside components. Its technical application principle is to use ultrasonic beams to be incident on the inside of metal materials. After the defects between the various carrier surfaces inside the metal structure are found, the corresponding defective parts of the parts generate reflected waves, which are received by the probe and displayed on the display screen as pulse waveforms, providing technical staff with a basis for judging the location, size, range and type of defects, realizing the characteristic measurement of the workpiece, the detection and evaluation of the changes in the organizational structure and mechanical properties, and finally completing the comprehensive evaluation of the overall application performance of the workpiece. The ultrasonic flaw detector uses a beam of longitudinal waves to scan the workpiece being inspected. If it encounters an interface of different acoustic impedance media, sound energy will be reflected back, that is, the defect signal or interface signal is displayed on the fluorescent screen of the inspection device to show its location and equivalent size.

[0003] Copper is a metal that is prone to oxidation. A light green or reddish oxide film will naturally form on the surface. This oxide layer can well protect the copper plate from further oxidation. On the oxide layer, there will be some impurities such as grease, dust and fine particles. These impurities are usually suspended in the air and attached to the surface of the copper plate with the flow of air. The grease and impurity content on the surface of the copper plate is usually very small and usually does not need to be considered.

[0004] At present, in the process of processing copper plates and strips, metal copper and copper plates and strips are prone to redox reactions with oxygen, forming oxidized inclusions on the surface or radial surface of copper. Oxidized inclusions are similar to pores, and the locations of the two defects are also similar. Therefore, it is difficult to distinguish these two defects when they appear together. Existing ultrasonic testing technology cannot accurately judge these two defects. Summary of the invention

[0005] The object of the present invention is to provide an automatic flaw detection method and device based on ultrasonic wave to solve the above-mentioned problems, so as to improve the existing ultrasonic detection technology which cannot accurately distinguish the state and position of the two defects, oxidation inclusions and pores.

[0006] The technical solution adopted by the present invention is as follows: an automatic flaw detection method based on ultrasonic wave, the method is used to detect the defects of the detected object, the method comprises the following steps: step S100: measuring the size of the detected object, including the length ,Width , height / thickness ; Set a coordinate origin and establish a coordinate axis about the object to be detected; Step S200: Use an ultrasonic flaw detector to scan the object to be detected and obtain the peak length of the ultrasonic wave and the duration from ultrasonic emission to reception , and record the movement route of the ultrasonic flaw detector; step S300: determine whether there is a defect according to the parameters obtained in step S200, if there is a defect, further determine the type of the defect, if there is no defect, continue to detect the next object to be detected; step S400: locate the specific position of the defect according to the movement route data of the ultrasonic flaw detector, mark the position of the defect, and transmit the position data of the defect back to the mobile device.

[0007] Furthermore, in step S100, the coordinate origin (0,0,0) is set according to the specific shape of the detected object, wherein the upper surface of the detected object is used as Axis plane, that is, the height direction of the object being detected The axis extends in the negative direction.

[0008] Further, the step S200 specifically includes the following steps: Step S201: The ultrasonic flaw detector Axis moves in positive direction As the starting position, the ultrasonic flaw detector Start scanning the object to be detected, and its scanning path is Plane; Step S202: Set the ultrasonic wave peak heights emitted and received by the ultrasonic flaw detector to If there is no defect in the object being tested, the peak height of the ultrasonic wave emitted and received by the ultrasonic flaw detector Equal, the peaks are ; If there is a defect in the object being tested, the peak height of the ultrasonic wave emitted and received by the ultrasonic flaw detector is ; Step S203: According to the peak height recorded in real time and waveform duration The data finds the peak height of the detected object when there is no defect and the duration from ultrasonic emission to reception, and sets the peak height and waveform duration when there is no defect to and , and record the real-time coordinates and movement route of the ultrasonic flaw detector.

[0009] Furthermore, the velocity of the longitudinal wave of the ultrasonic wave in the object being detected is The calculation formula is:

[0010]

[0011] in, is the velocity of ultrasonic longitudinal wave, is the Young's modulus of metallic copper, is the density of metallic copper, is the propagation speed of laser in air;

[0012] The speed of ultrasonic waves in air is , then the ultrasonic wave from The wavelength from the plane to the surface of the object being detected is:

[0013]

[0014]

[0015] in, is the time from ultrasonic emission to reception when there is no defect, For ultrasound The wavelength from the plane to the surface of the object being detected.

[0016] It should be noted that the wave speed calculation method is a prior art.

[0017] Furthermore, the defect types are set to be oxidation inclusions and pores, and the peak of the ultrasonic wave of the object to be detected is set to , the defect wavelength duration is ;

[0018] The peak height The calculation formula is:

[0019]

[0020]

[0021] in, is the peak height when there is no defect, is the velocity of ultrasonic longitudinal wave, is the waveform duration, It is the wavelength of the ultrasonic wave from the transmitting point to the surface of the detected object;

[0022] The step S300 includes the following steps:

[0023] Step S301: Set the transmission frequency of the ultrasonic flaw detector to , when the peak value of the measured When the waveform duration is Determine whether there are defects;

[0024] Step S302: If the duration , then there is no defect; if the duration , then there is a defect;

[0025] When there is a defect, adjust the transmission frequency of the ultrasonic flaw detector to and , and re-detect the defective position;

[0026] in, and is the peak height and waveform duration when there is no defect, , , is a constant;

[0027] It should be noted that To correct the parameters, according to the correction parameters , perform ultrasonic testing at different frequencies to further determine the type of defect; modify parameters It is an empirical parameter obtained by measuring pores or oxidation inclusion defects separately.

[0028] Step S303: When the transmission frequency of the ultrasonic flaw detector is and Under the condition of ;

[0029]

[0030] in, is the velocity of ultrasonic longitudinal wave, is the waveform duration, It is the wavelength of the ultrasonic wave from the transmitting point to the surface of the detected object;

[0031] After measuring and For comparison:

[0032]

[0033]

[0034]

[0035] in, is the ratio of the wave peak to the transmitting frequency of the ultrasonic flaw detector, is the ratio of the peak height to the frequency when there is no defect, When there is a defect, the peak height and frequency are The ratio of When there is a defect, the peak height and frequency are The ratio of and and For comparison, if and , then the defect is a pore; if and , then the defect is an oxide inclusion.

[0036] Furthermore, the step S400 includes the following steps:

[0037] Step S401: Set the coordinates of the ultrasonic flaw detector to , then the coordinates corresponding to the defect are ;

[0038] Step S402: Based on all coordinates of the defects detected by the ultrasonic flaw detector, the volume of the defects can be calculated, and then the defect rate can be calculated.

[0039] Furthermore, in step S203, based on the peak height transmitted by the ultrasonic flaw detector and the duration data from ultrasonic emission to reception, the peak when there is no defect is the peak height transmitted by the ultrasonic flaw detector, and the duration data from ultrasonic emission to reception when there is no defect is the duration of one cycle of the wave where the peak is located.

[0040] Furthermore, the type of defect to be determined needs to satisfy the conditions of steps S302 and S303 at the same time. If the defect does not satisfy any of the conditions of steps S302 and S303, the defect is another defect type.

[0041] Furthermore, an ultrasonic-based automatic flaw detection device is provided, the device comprising a multi-channel flaw detector, a probe group, a testing table and an operating table, the multi-channel flaw detector is arranged above the testing table, and the multi-channel flaw detector is provided with a probe group, the object to be detected is placed on the testing table, the operating table is provided with a control device, and an operator controls the multi-channel flaw detector on the control device; wherein a moving device is provided on the testing table, the multi-channel flaw detector is connected to the moving device, and the multi-channel flaw detector is driven to move by the moving device.

[0042] Furthermore, the multi-channel flaw detector transmits the flaw detection data to a mobile device for storage, and displays a waveform on the mobile device. The mobile device is set on an operating table, and the mobile device displays whether there is a defect and the type of defect.

[0043] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0044] The present invention determines the existence of pores and oxidation inclusion defects in copper metal and copper strips, which are difficult to distinguish. According to the measurement data of the ultrasonic flaw detector, the peak height and the duration from the emission to the reception of the ultrasonic wave under different conditions are calculated and compared, and the correction parameters are set. , the peak height of the ultrasonic wave and the time from ultrasonic emission to reception are measured at different frequencies, and then the type of defect is preliminarily determined; further, the existing mathematical model is corrected to accurately determine the type of defect, which can improve the product qualification rate to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a flow chart of the method of the present invention

[0046] Figure 2 It is a defect-free flaw detection diagram of the present invention;

[0047] Figure 3 It is a defective flaw detection diagram of the present invention;

[0048] Figure 4 It is a schematic diagram of the device of the present invention.

[0049] Label description: 1. Test bench; 2. Operating table; 3. Multi-channel flaw detector; 4. Probe group; 5. Control device; 6. Mobile device; 7. Mobile device. DETAILED DESCRIPTION

[0050] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0051] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0052] Example 1

[0053] like Figure 1 As shown, one embodiment of the present invention is an automatic flaw detection method based on ultrasonic wave, the method is used to detect the defects of the detected object, the method comprises the following steps: Step S100: measuring the size of the detected object, including the length ,Width , height / thickness ; Set a coordinate origin and establish a coordinate axis about the object to be detected; Step S200: Use an ultrasonic flaw detector to scan the object to be detected and obtain the peak length of the ultrasonic wave and the duration from ultrasonic emission to reception , and record the movement route of the ultrasonic flaw detector; step S300: determine whether there is a defect according to the parameters obtained in step S200, if there is a defect, further determine the type of the defect, if there is no defect, continue to detect the next object to be detected; step S400: locate the specific position of the defect according to the movement route data of the ultrasonic flaw detector, mark the position of the defect, and transmit the position data of the defect back to the mobile device.

[0054] The operator measures the size of the object to be inspected manually or by program control, and establishes a coordinate system. The coordinates are used to locate the position of the defect. If the object to be inspected is not a rectangle, the range of the coordinate axis should surround the object to be inspected. When using an ultrasonic flaw detector to scan the object to be inspected, it starts from the origin and scans the object to be inspected in a certain order, such as first scanning the origin. The axis moves in the positive direction and then The axis moves in the positive direction to obtain the peak length of the ultrasonic wave and the duration from ultrasonic emission to reception , and record the movement path of the ultrasonic flaw detector at the same time to facilitate the location of the defect.

[0055] Determine whether there are pores or oxidation inclusion defects. If so, further determine the type of defect. If not, other methods are needed to determine whether there are other defects.

[0056] The type of defect can be determined by calculation, so that different defects can be processed and the product qualification rate can be improved.

[0057] In order to better locate the specific position of the defect, in step S100, the coordinate origin (0,0,0) is set according to the specific shape of the detected object, wherein the upper surface of the detected object is used as Axis plane, that is, the height direction of the object being detected The axis extends in the negative direction.

[0058] Set the coordinate origin and coordinate axis, and ensure that the object to be inspected is within the set coordinate axis, so that the position of the defect can be accurately located. Set the ultrasonic flaw detector above the object to be inspected and at a certain distance from the object to be inspected to avoid damage to the object to be inspected by ultrasonic waves.

[0059] By setting the coordinate axis and coordinate origin, the position of the defect can be accurately located, which makes it easier to mark and process the defect and improve work efficiency.

[0060] The step S200 specifically includes the following steps:

[0061] Step S201: The ultrasonic flaw detector Axis moves in positive direction As the starting position, the ultrasonic flaw detector Start scanning the object to be detected, and its scanning path is flat;

[0062] Step S202: Set the peak heights of the ultrasonic waves emitted and received by the ultrasonic flaw detector to If there is no defect in the object being tested, the peak height of the ultrasonic wave emitted and received by the ultrasonic flaw detector Equal, the peaks are ; If there is a defect in the object being tested, the peak height of the ultrasonic wave emitted and received by the ultrasonic flaw detector is ;

[0063] Step S203: Based on the peak height recorded in real time and waveform duration The data finds the peak height of the detected object when there is no defect and the duration from ultrasonic emission to reception, and sets the peak height and waveform duration when there is no defect to and , and record the real-time coordinates and movement route of the ultrasonic flaw detector.

[0064] When there is no defect, the ultrasonic wave will return when it touches the upper surface of the object being detected. If there is a defect, the ultrasonic wave will return only after it touches the defect. Therefore, the peaks of the detected ultrasonic waves are different and the waveform duration is also different; thus, the defects can be judged based on the peaks and waveform duration.

[0065] According to the existing calculation method, it can be obtained that the velocity of the longitudinal wave of the ultrasonic wave in the detected object is The calculation formula is:

[0066]

[0067] in, is the velocity of ultrasonic longitudinal wave, is the Young's modulus of metallic copper, is the density of metallic copper, is the propagation speed of laser in air;

[0068] The speed of ultrasonic waves in air is , then the ultrasonic wave from The wavelength from the plane to the surface of the object being detected is:

[0069]

[0070]

[0071] in, The time from the emission to the reception of ultrasonic waves when there is no defect; For ultrasound The wavelength from the plane to the surface of the object being detected.

[0072] The propagation of ultrasound depends on the density of the medium , the velocity of longitudinal waves Depends on the Young's modulus of the material , the velocity of the shear wave depends on the shear modulus of the material .

[0073] Set the defect type to oxide inclusions and pores, and set the peak of the ultrasonic wave of the object to be tested to , the defect wavelength duration is ;

[0074] The peak height The calculation formula is:

[0075]

[0076]

[0077] in, is the peak height when there is no defect, is the velocity of ultrasonic longitudinal wave, is the waveform duration, It is the wavelength of the ultrasonic wave from the transmitting point to the surface of the detected object;

[0078] The step S300 includes the following steps:

[0079] Step S301: Set the transmission frequency of the ultrasonic flaw detector to , when the peak value of the measured When the waveform duration is Determine whether there are defects;

[0080] Step S302: If the duration , then there is no defect; if the duration , then there is a defect;

[0081] When there is a defect, adjust the transmission frequency of the ultrasonic flaw detector to and , and re-detect the defective position;

[0082] in, and is the peak height and waveform duration when there is no defect, , , is a constant;

[0083] Step S303: When the transmission frequency of the ultrasonic flaw detector is and Under the condition of ;

[0084]

[0085] in, is the velocity of ultrasonic longitudinal wave, is the waveform duration, It is the wavelength of the ultrasonic wave from the transmitting point to the surface of the detected object;

[0086] After measuring and For comparison:

[0087]

[0088]

[0089]

[0090] in, is the ratio of the wave peak to the transmitting frequency of the ultrasonic flaw detector, is the ratio of the peak height to the frequency when there is no defect, When there is a defect, the peak height and frequency are The ratio of When there is a defect, the peak height and frequency are The ratio of and and For comparison, if and , then the defect is a pore; if and , then the defect is an oxide inclusion.

[0091] Judging the defect type from the perspectives of the ultrasonic wave peak and waveform duration requires that both conditions are met to determine the defect type. This allows verification during the judgment process to verify whether the previous judgment is correct, thereby improving the accuracy of the judgment.

[0092] The step S400 includes the following steps:

[0093] Step S401: Set the coordinates of the ultrasonic flaw detector to , then the coordinates corresponding to the defect are ;

[0094] Step S402: Based on all coordinates of the defects detected by the ultrasonic flaw detector, the volume of the defects can be calculated, and then the defect rate can be calculated.

[0095] According to the coordinates of the ultrasonic flaw detector, the coordinates of the defect are further determined. Axis and Axis coordinates and ultrasonic flaw detector Axis and The axis coordinates are the same. The axis coordinate is related to the depth of the defect and can be determined based on the ultrasonic flaw detector's flaw detection data. Axis coordinates are obtained to obtain the specific coordinates of the defect and then calculate the area of ​​the defect.

[0096] Example 2

[0097] One embodiment of the present invention is as follows Figure 2-Figure 3 As shown, Figure 2 This is a defect-free ultrasonic test image. There are no defects in the set area. Figure 3 This is a defective ultrasonic detection diagram. Among them, Figure 2 and Figure 3 The horizontal and vertical coordinates in the middle represent the length scales established based on the object to be scanned, in millimeters (mm); the intersection of the two red lines in the figure represents the position where the ultrasonic flaw detector is detecting. As the ultrasonic flaw detector moves, the two red lines will move with the movement of the ultrasonic flaw detector. To determine the type of defect, the conditions of steps S302 and S303 must be met at the same time. If the defect does not meet any of the conditions of steps S302 and S303, the defect is another defect type. Other defects include cracks and uneven surfaces. The specific judgment method can refer to the existing method for judgment. Pores and oxidation inclusions are relatively similar and are both located on the surface of the object. This embodiment is set according to the different media in the two defects, so as to specifically distinguish the two defects.

[0098] Example 3

[0099] like Figure 4 As shown, one embodiment of the present invention is an automatic flaw detection device based on ultrasonic waves, the device comprising a multi-channel flaw detector 3, a probe group 4, a test bench 1 and an operating table 2, the multi-channel flaw detector 3 is arranged above the test bench 1, and the multi-channel flaw detector 3 is provided with a probe group 4, the object to be detected is placed on the test bench 1, the operating table 2 is provided with a control device 5, and an operator controls the multi-channel flaw detector 3 on the control device 5;

[0100] The detection platform 1 is provided with a moving device 6 , and the multi-channel flaw detector 3 is connected to the moving device 6 , and the moving device 6 drives the multi-channel flaw detector 3 to move.

[0101] The equipment can be operated with existing equipment, and the flaw detection device can also be equipped with a surface treatment device to remove water stains, oil stains and other stains on the surface of the object to be detected before ultrasonic flaw detection to avoid affecting the accuracy of ultrasonic flaw detection. Because the grease content on the surface of the copper plate is very small, it will not have a significant impact on its performance and service life. If an oil-free copper plate is required, the grease and impurities on the surface can be removed by surface treatment. Surface treatment methods include chemical cleaning, electrolytic decontamination, mechanical polishing, etc.

[0102] Example 4

[0103] On the basis of the above-mentioned embodiment, the present invention can also adopt the following setting mode, in order to improve the efficiency of flaw detection and detect larger objects. Multiple probes can be used on the flaw detection device to detect at the same time, or the probes can be set on both sides of the object to be detected, and the object to be detected can be detected by TOFD detection method. The detected data is compared with the set data range of each defect to obtain the type of defect.

[0104] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic flaw detection method based on ultrasonic waves, the method is used to detect defects of an object to be detected, characterized in that: The method comprises the following steps: Step S100: Measure the size of the object to be detected, including length ,Width , height / thickness ; Set a coordinate origin and establish the coordinate axis about the object to be detected; Step S200: Use an ultrasonic flaw detector to scan the object to be inspected and obtain the peak height of the ultrasonic wave. and the duration from ultrasonic emission to reception , and record the movement route of the ultrasonic flaw detector; Step S300: judging whether there is a defect according to the parameters obtained in step S200, and if there is a defect, further judging the type of the defect, and if there is no defect, continuing to detect the next object to be detected; Step S400: Locate the specific position of the defect according to the movement route data of the ultrasonic flaw detector, mark the position of the defect, and transmit the position data of the defect back to the mobile device; The step S200 specifically includes the following steps: Step S201: Ultrasonic flaw detector Axis moves in positive direction As the starting position, the ultrasonic flaw detector Start scanning the object to be detected, and its scanning path is flat; Step S202: Set the peak heights of the ultrasonic waves emitted and received by the ultrasonic flaw detector to If there is no defect in the object being tested, the peak height of the ultrasonic wave emitted and received by the ultrasonic flaw detector Equal, the peaks are ; If there is a defect in the object being tested, the peak height of the ultrasonic wave emitted and received by the ultrasonic flaw detector is ; Step S203: Based on the peak height recorded in real time and waveform duration The data finds the peak height of the detected object when there is no defect and the duration from ultrasonic emission to reception, and sets the peak height and waveform duration when there is no defect to and , and record the real-time coordinates and movement route of the ultrasonic flaw detector; Set the defect type to oxide inclusions and pores, and set the peak of the ultrasonic wave of the object to be tested to , the defect wavelength duration is ; The peak height The calculation formula is: in, is the peak height when there is no defect, is the velocity of ultrasonic longitudinal wave, is the waveform duration, It is the wavelength of the ultrasonic wave from the transmitting point to the surface of the detected object; The step S300 includes the following steps: Step S301: Set the transmission frequency of the ultrasonic flaw detector to , when the peak value of the measured When the waveform duration is Determine whether there are defects; Step S302: If the duration , then there is no defect; if the duration , then there is a defect; When there is a defect, adjust the transmission frequency of the ultrasonic flaw detector to and , and re-detect the defective position; in, and is the peak height and waveform duration when there is no defect, , , is a constant; Step S303: When the transmission frequency of the ultrasonic flaw detector is and Under the condition of ; in, is the velocity of ultrasonic longitudinal wave, is the waveform duration, It is the wavelength of the ultrasonic wave from the transmitting point to the surface of the detected object; After measuring and For comparison: in, is the ratio of the wave peak to the transmitting frequency of the ultrasonic flaw detector, is the ratio of the peak height to the frequency when there is no defect, When there is a defect, the peak height and frequency are The ratio of When there is a defect, the peak height and frequency are The ratio of and and For comparison, if and , then the defect is a pore; if and , then the defect is an oxide inclusion.

2. The ultrasonic automatic flaw detection method according to claim 1, characterized in that: In step S100, the coordinate origin (0,0,0) is set according to the specific shape of the detected object, wherein the upper surface of the detected object is used as Axis plane, that is, the height direction of the object being detected The axis extends in the negative direction.

3. The ultrasonic automatic flaw detection method according to claim 1, characterized in that: The velocity of the longitudinal wave of ultrasonic wave in the object being detected The calculation formula is: in, is the velocity of ultrasonic longitudinal wave, is the Young's modulus of metallic copper, is the density of metallic copper, is the propagation speed of laser in air; The speed of ultrasonic waves in air is , then the ultrasonic wave from The wavelength from the plane to the surface of the object being detected is: in, is the time from ultrasonic emission to reception when there is no defect, For ultrasound The wavelength from the plane to the surface of the object being detected.

4. The ultrasonic automatic flaw detection method according to claim 1, characterized in that: The step S400 includes the following steps: Step S401: Set the coordinates of the ultrasonic flaw detector to , then the coordinates corresponding to the defect are ; Step S402: Based on all coordinates of the defects detected by the ultrasonic flaw detector, the volume of the defects can be calculated, and then the defect rate can be calculated.

5. The ultrasonic automatic flaw detection method according to claim 1, characterized in that: In step S203, according to the peak height transmitted by the ultrasonic flaw detector and the duration data from ultrasonic emission to reception, the peak when there is no defect is the peak height transmitted by the ultrasonic flaw detector, and the duration data from ultrasonic emission to reception when there is no defect is the duration of one cycle of the wave where the peak is located.

6. The ultrasonic automatic flaw detection method according to claim 1, characterized in that: The type of defect needs to satisfy the conditions of steps S302 and S303 at the same time. If the defect does not satisfy any one of the conditions of steps S302 and S303, the defect is other defect types.

7. An ultrasonic-based automatic flaw detection device, using an ultrasonic-based automatic flaw detection method according to any one of claims 1 to 6, characterized in that: The device comprises a multi-channel flaw detector (3), a probe group (4), a test bench (1) and an operating table (2); the multi-channel flaw detector (3) is arranged above the test bench (1), and the multi-channel flaw detector (3) is provided with a probe group (4); an object to be tested is placed on the test bench (1); a control device (5) is provided on the operating table (2), and an operator controls the multi-channel flaw detector (3) on the control device (5); The inspection table (1) is provided with a moving device (6), the multi-channel flaw detector (3) is connected to the moving device (6), and the moving device (6) drives the multi-channel flaw detector (3) to move.

8. The ultrasonic automatic flaw detection device according to claim 7, characterized in that: The multi-channel flaw detector (3) transmits the flaw detection data to a mobile device (7) for storage, and displays a waveform on the mobile device (7). The mobile device (7) is arranged on an operating table (2). At the same time, the mobile device (7) displays whether a defect exists and the type of defect.

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