阅读说明：本技术 一种工件缺陷的检测装置及其检测方法 (Workpiece defect detection device and detection method thereof ) 是由 单清群 孙福庆 孙伟 胡广胜 江华 鲍宏 张泽勇 宋少龙 刘彬 于 2019-10-12 设计创作，主要内容包括：本发明公开了一种工件缺陷的检测装置及其检测方法。本发明提供了一种工件缺陷的检测装置,包括用于检测工件缺陷数据信息的超声检测单元,位置采集单元以及处理单元；所述位置采集单元与所述超声检测单元连接,用于采集超声检测单元在工件检测面上移动的位置信息；所述处理单元分别与所述位置采集单元以及所述超声检测单元连接,用于将工件缺陷的数据信息与该缺陷在特定位置的位置信息一一对应转换成缺陷的三维图像；该检测装置使得缺陷的直观性强,本发明还提供一种检测方法,包括处理单元将超声检测单元检测的工件缺陷的数据信息与位置采集单元采集的超声检测单元在工件检测面上的位置信息一一对应转换成缺陷的三维图像。(The invention discloses a device and a method for detecting workpiece defects. The invention provides a workpiece defect detection device, which comprises an ultrasonic detection unit, a position acquisition unit and a processing unit, wherein the ultrasonic detection unit is used for detecting workpiece defect data information; the position acquisition unit is connected with the ultrasonic detection unit and is used for acquiring the position information of the ultrasonic detection unit moving on the detection surface of the workpiece; the processing unit is respectively connected with the position acquisition unit and the ultrasonic detection unit and is used for correspondingly converting data information of the defects of the workpiece and position information of the defects at specific positions into three-dimensional images of the defects one by one; the detection device enables the intuition of the defect to be strong, and the invention also provides a detection method which comprises the step that the processing unit correspondingly converts the data information of the defect of the workpiece detected by the ultrasonic detection unit and the position information of the ultrasonic detection unit on the detection surface of the workpiece, which is acquired by the position acquisition unit, into a three-dimensional image of the defect.)

1. The device for detecting the defects of the workpiece is characterized by comprising an ultrasonic detection unit, a position acquisition unit and a processing unit, wherein the ultrasonic detection unit is used for detecting data information of the defects of the workpiece;

the position acquisition unit is connected with the ultrasonic detection unit and is used for acquiring the position information of the ultrasonic detection unit moving on the detection surface of the workpiece;

the processing unit is respectively connected with the position acquisition unit and the ultrasonic detection unit and is used for converting data information of the defects of the workpiece and position information of the defects at specific positions into visible three-dimensional images of the defects in a one-to-one correspondence manner.

2. The apparatus for detecting defects of a workpiece according to claim 1, wherein the ultrasonic detection unit includes an ultrasonic wave transmitting unit for transmitting ultrasonic waves to the inside of the workpiece, and an ultrasonic wave receiving unit;

the ultrasonic receiving unit is used for receiving ultrasonic waves reflected by the workpiece and outputting ultrasonic information signals;

the processing unit is connected with the ultrasonic receiving unit and used for receiving ultrasonic information signals;

preferably, the ultrasonic detection unit comprises an ultrasonic probe.

3. The workpiece defect detection device of claim 2, wherein the position acquisition unit comprises a first position recorder, a second position recorder and a data collector;

the first position recorder and the second position recorder are connected with the ultrasonic probe and are used for respectively recording the positions of the ultrasonic probe in the X-axis direction and the Y-axis direction and outputting respective position information;

the data acquisition unit is respectively connected with the first position recorder and the second position recorder and is used for acquiring the position information of the ultrasonic probe and outputting a position information signal;

the processing unit is connected with the data acquisition unit and used for receiving the position information signal.

4. The apparatus of claim 2 or 3, wherein the processing unit comprises a processor having an operation panel and a display panel;

the processor converts the ultrasonic information signals and the position information signals into three-dimensional images of the defects in a one-to-one correspondence manner;

the display panel is used for displaying a three-dimensional image of the defect.

5. A method for detecting defects of a workpiece, using the apparatus for detecting defects of a workpiece according to any one of claims 1 to 4, comprising: the processing unit converts the data information of the defects of the workpiece detected by the ultrasonic detection unit and the position information of the ultrasonic detection unit on the detection surface of the workpiece, which is acquired by the position acquisition unit, into three-dimensional images of the defects in a one-to-one correspondence manner.

6. The method of detecting defects in a workpiece according to claim 5, comprising:

the ultrasonic probe detects data information of workpiece defects and outputs the detected data information;

the first position recorder and the second position recorder respectively record the position information of the ultrasonic probe on an X, Y axis and output the respective position information;

the data acquisition unit acquires X, Y position information in the axial direction and outputs a X, Y position information signal;

the processor receives the ultrasonic information signal and the position information signal in the X, Y axis direction, reads the burial depth of the defect relative to the detection surface from the ultrasonic probe, and combines the burial depth and the position information in the X, Y axis direction to obtain three-dimensional space position information of the defect in the workpiece;

the processor converts the data information signals and the corresponding three-dimensional spatial position information into a three-dimensional image of the defect in a one-to-one correspondence manner.

7. The method of detecting defects in a workpiece according to claim 6, comprising: and carrying out image binarization on the generated three-dimensional image with the defect to obtain the three-dimensional binarized image with the defect.

8. The method of detecting workpiece defects according to any of claims 5-6, comprising: the processor receives the defect data information signal, corresponds the data value of the defect to different RGB color values, and then corresponds the data value of the defect to the position information.

9. The method of claim 8, comprising:

s1, placing the workpiece to be measured on an operation table and fixing;

s2, coating a coupling agent on the surface of the ultrasonic probe contacting the workpiece detection surface;

s3, selecting a position of the detection surface, scanning the detection surface of the position by the ultrasonic probe, executing the step S5, finishing the position detection, and executing the step S4;

s4, the ultrasonic probe is manually moved to the next position to continue detection, and the step S5 is executed;

s5, the processor converts the received defect data information and the position information of the defect at the position into a three-dimensional image in a one-to-one correspondence manner;

preferably, the coupling agent is oil or petrolatum.

10. The method of detecting defects in a workpiece according to claim 9, comprising: the time interval for which the ultrasonic probe moves from the previous position to the next position for detection is specified.

Technical Field

The invention belongs to the field of nondestructive testing, and particularly relates to a device and a method for detecting workpiece defects.

Background

The carbon fiber composite material is light in weight, excellent in mechanical property and strong in designability, but the carbon fiber composite material can form various defects in the manufacturing process or the using process, so that the research on the detection and identification means of the defects in the carbon fiber composite material application member is very important. The low conductivity and low thermal conductivity of the carbon fiber composite material increase the difficulty of nondestructive inspection, the carbon fiber structural part is usually complex and is easy to generate micro cracks and layering phenomena under the stress action, and the layering defects occur between layers in the carbon fiber composite material, so that the direct observation and detection are difficult;

at present, the method for detecting internal defects of materials generally utilizes an ultrasonic detection technology, wherein ultrasonic detection refers to a nondestructive flaw detection method for detecting internal defects by utilizing ultrasonic waves. The size of the defect can be judged according to the height, the position and the like of the echo signal displayed on the fluorescent screen, a three-dimensional image of the defect cannot be displayed, and the intuitiveness of the ultrasonic detection is poor.

The present invention has been made in view of this situation.

Disclosure of Invention

The invention aims to solve the technical problem that the prior art has poor intuition of ultrasonic detection, and provides a locking mechanism and a filter.

In order to solve the technical problems, the invention adopts the technical scheme that:

in one aspect of the invention, a workpiece defect detection device is provided, which comprises an ultrasonic detection unit for detecting workpiece defect data information, a position acquisition unit and a processing unit;

the position acquisition unit is connected with the ultrasonic detection unit and is used for acquiring the position information of the ultrasonic detection unit moving on the detection surface of the workpiece;

the processing unit is respectively connected with the position acquisition unit and the ultrasonic detection unit and is used for converting data information of the defects of the workpiece and position information of the defects at specific positions into visible three-dimensional images of the defects in a one-to-one correspondence manner.

Further, the ultrasonic detection unit comprises an ultrasonic wave transmitting unit for transmitting ultrasonic waves to the inside of the workpiece and an ultrasonic wave receiving unit;

the ultrasonic receiving unit is used for receiving ultrasonic waves reflected by the workpiece and outputting ultrasonic information signals;

the processing unit is connected with the ultrasonic receiving unit and used for receiving ultrasonic information signals;

preferably, the ultrasonic detection unit comprises an ultrasonic probe.

Furthermore, the position acquisition unit comprises a first position recorder, a second position recorder and a data acquisition unit;

the first position recorder and the second position recorder are connected with the ultrasonic probe and are used for respectively recording the positions of the ultrasonic probe in the X-axis direction and the Y-axis direction and outputting respective position information;

the data acquisition unit is respectively connected with the first position recorder and the second position recorder and is used for acquiring the position information of the ultrasonic probe and outputting a position information signal;

the processing unit is connected with the data acquisition unit and used for receiving the position information signal.

Further, the processing unit includes a processor having an operation panel and a display panel;

the processor converts the ultrasonic information signals and the position information signals into three-dimensional images of the defects in a one-to-one correspondence manner;

the display panel is used for displaying a three-dimensional image of the defect.

Another object of the present invention is to provide a method for detecting defects of a workpiece, so as to enhance the intuitiveness of defect detection, wherein the method for detecting defects of a workpiece adopts the method for detecting defects of a workpiece provided by the above technical solution, and comprises: the processing unit converts the data information of the defects of the workpiece detected by the ultrasonic detection unit and the position information of the ultrasonic detection unit on the detection surface of the workpiece, which is acquired by the position acquisition unit, into three-dimensional images of the defects in a one-to-one correspondence manner.

Further, the ultrasonic probe detects data information of workpiece defects and outputs the detected data information;

the first position recorder and the second position recorder respectively record the position information of the ultrasonic probe on an X, Y axis and output the respective position information;

the data acquisition unit acquires X, Y position information in the axial direction and outputs a X, Y position information signal;

the processor receives the ultrasonic information signal and the position information signal in the X, Y axis direction, reads the burial depth of the defect relative to the detection surface from the ultrasonic probe, and combines the burial depth and the position information in the X, Y axis direction to obtain three-dimensional space position information of the defect in the workpiece;

the processor converts the data information signals and the corresponding three-dimensional spatial position information into a three-dimensional image of the defect in a one-to-one correspondence manner.

Further, comprising: and carrying out image binarization on the generated three-dimensional image with the defect to obtain the three-dimensional binarized image with the defect.

Further, comprising: the processor receives the defect data information signal, corresponds the data value of the defect to different RGB color values, and then corresponds the data value of the defect to the position information.

Further, comprising:

s1, placing the workpiece to be measured on an operation table and fixing;

s2, coating a coupling agent on the surface of the ultrasonic probe contacting the workpiece detection surface;

s3, selecting a position of the detection surface, scanning the detection surface of the position by the ultrasonic probe, executing the step S5, finishing the position detection, and executing the step S4;

s4, the ultrasonic probe is manually moved to the next position to continue detection, and the step S5 is executed;

s5, the processor converts the received defect data information and the position information of the defect at the position into a three-dimensional image in a one-to-one correspondence manner;

preferably, the coupling agent is oil or petrolatum.

Further, comprising: the time interval for which the ultrasonic probe moves from the previous position to the next position for detection is specified.

After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.

1. The detection device provided by the invention comprises an ultrasonic detection unit, a position acquisition unit and a processing unit; the position acquisition unit is connected with the ultrasonic detection unit, the processing unit is respectively connected with the position acquisition unit and the ultrasonic detection unit, and the processing unit converts data information of the defects of the workpiece and position information of the defects at specific positions into three-dimensional images of the defects in a one-to-one correspondence manner, so that the intuitiveness of the defects is enhanced;

2. the improved detection method comprises the steps that the processing unit correspondingly converts the data information of the defects of the workpiece detected by the ultrasonic detection unit and the position information of the ultrasonic detection unit on the detection surface of the workpiece, which is acquired by the position acquisition unit, into three-dimensional images of the defects one by one, so that the intuitiveness of the defects is enhanced;

3. the improved detection method comprises the step of carrying out image binarization on the obtained three-dimensional graph, wherein the binarization of the image greatly reduces the data volume in the image, so that the outline of a target can be highlighted.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a flow chart of an apparatus for detecting defects in a workpiece according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an apparatus for detecting defects in a workpiece according to an embodiment of the present invention;

FIG. 3 is a flow chart of a method for detecting defects in a workpiece according to one embodiment of the present invention;

FIG. 4 is a flow chart of a method for improved detection of workpiece defects according to another embodiment of the present invention.

Icon: 1-an ultrasonic detection unit; 11-an ultrasonic wave emitting unit; 12-an ultrasonic receiving unit; 13-an ultrasonic probe; 2-a position acquisition unit; 21-a first position recorder; 22-a second position recorder; 23-a data collector; 3-a processing unit; 31-a processor; 32-a display panel; 33-an operating panel; 4-a workpiece; 5-operating platform.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, the embodiment of the present invention provides an apparatus for detecting defects of a workpiece 4, which includes an ultrasonic detection unit 1 for detecting defect data information of the workpiece 4, a position acquisition unit 2 and a processing unit 3;

the position acquisition unit 2 is connected with the ultrasonic detection unit 1 and is used for acquiring the position information of the ultrasonic detection unit 1 moving on the detection surface of the workpiece 4;

the processing unit 3 is respectively connected with the position acquisition unit 2 and the ultrasonic detection unit 1 and is used for correspondingly converting data information of the defects of the workpiece 4 and position information of the defects at specific positions into three-dimensional images of the defects one by one;

in the embodiment of the invention, an ultrasonic detection unit 1 detects defect data information in a workpiece 4 and outputs a defect data information signal, a position acquisition unit 2 acquires position information of the ultrasonic detection unit 1 on a detection surface of the workpiece 4 and outputs the position information signal, a processing unit 3 receives the defect data information signal and the position information signal and converts the defect data information and the position information of the defect at a specific position into a visible three-dimensional image of the defect in a one-to-one correspondence manner, and the detection device can obtain the visible three-dimensional image of the defect according to the position of the defect, can obtain the three-dimensional image of the defect at the specific position and enhances the intuitiveness of the defect;

for the inspection apparatus, the inspection apparatus can be used to inspect various internal defects of the workpiece 4, and the workpiece 4 may be a carbon fiber structure, steel, or the like.

As shown in fig. 1 and 2, in the embodiment of the present invention, the ultrasonic detection unit 1 includes an ultrasonic wave transmitting unit 11 for transmitting ultrasonic waves to the inside of the workpiece 4, and an ultrasonic wave receiving unit 12;

the ultrasonic receiving unit 12 is used for receiving the ultrasonic wave reflected by the workpiece 4 and outputting an ultrasonic information signal;

the processing unit 3 is connected with the ultrasonic receiving unit 12 and is used for receiving the ultrasonic information signal;

in the embodiment of the invention, the ultrasonic wave transmitting unit 11 transmits ultrasonic waves to the surface of the workpiece 4 through the coupling agent, when the ultrasonic waves propagate in the workpiece 4, different reflection signals exist when the ultrasonic waves meet different interfaces, the ultrasonic wave receiving unit 12 receives and outputs the reflection signals to the processing unit 3, and the processing unit 3 receives the signals;

wherein, the ultrasonic detection unit 1 comprises an ultrasonic probe 13, and the ultrasonic probe 13 can be purchased in the market; when the ultrasonic probe 13 is used for detection, the ultrasonic probe 13 is in contact with the detection surface of the workpiece 4, and the ultrasonic probe 13 in contact with the detection surface of the workpiece 4 is coated with a coupling agent, wherein the coupling agent can be oil, vaseline and the like.

As shown in fig. 1 and fig. 2, in the embodiment of the present invention, the position acquisition unit 2 includes a first position recorder 21, a second position recorder 22, and a data collector 23;

the first position recorder 21 and the second position recorder 22 are connected to the ultrasonic probe 13, and record the positions of the ultrasonic probe 13 in the X-axis direction and the Y-axis direction, and output respective position information;

the data acquisition unit 23 is respectively connected with the first position recorder 21 and the second position recorder 22, and is used for acquiring the position information of the ultrasonic probe 13 and outputting a position information signal;

the processing unit 3 is connected with the data acquisition unit 23 and is used for receiving the position information signal;

in the embodiment of the invention, the first position recorder 21 and the second position recorder 22 are respectively connected with the ultrasonic probe 13, during detection, after the ultrasonic probe 13 detects a position on the detection surface of the workpiece 4, the ultrasonic probe 13 can be manually moved to a next position, the first position recorder 21 and the second position recorder 22 measure the position of the ultrasonic probe 13 in the X-axis direction and the position of the defect in the Y-axis direction after the ultrasonic probe 13 moves, so as to obtain the position of the defect in the X-axis direction and the position of the defect in the Y-axis direction, the data collector 23 collects the position information of the ultrasonic probe 13 and outputs the signal of the position information, and the processing unit 3 receives the signal of the position information and corresponds the position information to the data information of the defect of the workpiece 4 one by one;

the position information includes a position in the X-axis direction, a position in the Y-axis direction, and a position in the Z-axis direction, and the position information in the Z-axis direction is obtained by reading the burial depth of the defect with respect to the detection surface from the ultrasonic probe 13 by the processor 31, and the three-dimensional spatial position information of the defect in the workpiece 4 is obtained by combining the burial depth and the position information in the X, Y-axis direction; the first position recorder 21 and the second position recorder 22 are commercially available, and only the positional information after the movement of the ultrasonic probe 13 can be recorded.

As shown in fig. 1 and 2, in the embodiment of the present invention, the processing unit 3 includes a processor 31 having an operation panel 33;

the processor 31 converts the ultrasonic information signals and the position information signals into three-dimensional images of the defects in a one-to-one correspondence manner;

the display panel 32 is used for displaying a three-dimensional image of the defect;

in the embodiment of the present invention, the processor 31 has the operation panel 33 and the display panel 32, the operation panel 33 may be used to manually modify the setting parameters, the monitoring program is operated through the operation panel 33 to execute, and the like, the processor 31 converts the ultrasonic information signals and the position information signals into the visible three-dimensional image of the defect in a one-to-one correspondence, and the converted visible three-dimensional image is displayed through the display panel 32, so that the three-dimensional image of the defect at a specific position can be visually checked.

Specifically, the workpiece defect detection device further comprises an operation table 5, which can be obtained from the above, the ultrasonic detection unit 1 comprises an ultrasonic probe 13, the position acquisition unit 2 comprises a first position recorder 21, a second position recorder 22 and a data collector 23, the processing unit 3 comprises a processor 31 with an operation panel 33 and a display panel 32, the first position recorder 21, the second position recorder 22, the data collector 23 and the processor 31 are all arranged on the operation table 1, the workpiece 4 is placed or fixed on the operation table 1, the ultrasonic probe 13 can be moved on the detection surface of the workpiece 4 by hand, the ultrasonic probe 13 is connected with the first position recorder 21 and the second position recorder 22, and is in signal communication with the processor 31. the first position recorder 21 and the second position recorder 22 are both in signal communication with the processor 31 via the data collector 23.

As shown in fig. 3, another object of the present invention is to provide a method for detecting defects of a workpiece 4, in which the apparatus for detecting defects of a workpiece 4 provided by the above technical solution comprises: the processing unit 3 converts the data information of the defects of the workpiece 4 detected by the ultrasonic detection unit 1 and the position information of the ultrasonic detection unit 1 on the detection surface of the workpiece 4, which is acquired by the position acquisition unit 2, into three-dimensional images of the defects in a one-to-one correspondence manner;

in the embodiment of the invention, an ultrasonic detection unit 1 detects defect data information in a workpiece 4 and outputs a defect data information signal, a position acquisition unit 2 acquires position information of the ultrasonic detection unit 1 on a detection surface of the workpiece 4 and outputs the position information signal, a processing unit 3 receives the defect data information signal and the position information signal and converts the defect data information and the position information of the defect at a specific position into a visible three-dimensional image of the defect in a one-to-one correspondence manner, the detection method can obtain the visible three-dimensional image of the defect according to the position of the defect, can obtain the three-dimensional image of the defect at the specific position, and enhances the intuitiveness of the defect;

with respect to the inspection method, the inspection method can be used to inspect various internal defects of the workpiece 4, and the workpiece 4 may be a carbon fiber structure, steel, or the like.

As shown in fig. 3, the embodiment of the present invention includes:

the ultrasonic probe 13 detects data information of the defect of the workpiece 4 and outputs the detected data information;

the first position recorder 21 and the second position recorder 22 respectively record the position information of the ultrasonic probe on the X, Y axis and output the respective position information;

the data collector 23 collects X, Y position information in the axial direction and outputs X, Y position information signals in the axial direction;

the processor 31 receives the ultrasonic information signal and the position information signal in the X, Y axis direction, and the processor 31 reads the burial depth of the defect relative to the detection surface from the ultrasonic probe 13 and combines the burial depth with the position information in the X, Y axis direction to obtain the three-dimensional space position information of the defect in the workpiece 4;

the processor 31 converts the data information signals and the corresponding three-dimensional spatial position information into three-dimensional images of the defects in a one-to-one correspondence manner;

in the embodiment of the present invention, the three-dimensional spatial position of the defect in the workpiece 4 is determined by: the first position recorder 21 records the position information of the ultrasonic probe 13 in the X-axis direction, namely the position information of the defect in the X-axis direction, the second position recorder 22 records the position information of the ultrasonic probe 13 in the Y-axis direction, namely the position information of the defect in the Y-axis direction, and the burial depth of the defect read by the processor 31 relative to the detection surface is the position information of the defect in the Z-axis direction, so that the three-dimensional space position information of the defect in the workpiece 4 is obtained;

the processor 31 corresponds, merges and processes the absence data information and the three-dimensional spatial position information into an image, establishes a geometric model to obtain a three-dimensional image, and performs visual detection on the three-dimensional image to obtain a final visual three-dimensional image.

The embodiment of the invention comprises the following steps: and carrying out image binarization on the generated three-dimensional image with the defect to obtain the three-dimensional binarized image with the defect.

In the embodiment of the invention, the binarization of the three-dimensional image: the defect target automatic identification and extraction based on machine vision in the processing of the detected image realizes image binarization, a KSW entropy method is used as a threshold value selection method for graph segmentation, and a selected optimal threshold value is utilized, on the basis of a carbon fiber geometric model, MATLAB is used for segmenting the image, the defect target is extracted, the image binarization is realized, the secondary statistical property of the image is introduced in the algorithm, the segmentation quality of the image is improved, and the data volume in the image is greatly reduced by the image binarization, so that the outline of the target can be highlighted.

The embodiment of the invention comprises the following steps: the processor 31 receives the defect data information signal, and corresponds the data value of the defect to different RGB color values, and then corresponds the data value of the defect to position information;

in the embodiment of the invention, the RGB color values corresponding to the defect data values measured at a single time are refined, the color distinction is more obvious, the image segmentation is more accurate, the manual times are increased, and the detection image and the binarization image which are correspondingly integrated have higher accuracy.

As shown in fig. 4, the embodiment of the present invention includes:

s1, placing the workpiece 4 to be measured on an operation table and fixing;

s2, coating a coupling agent on the surface of the ultrasonic probe 13 contacting the detection surface of the workpiece 4;

s3, selecting one position of the detection surface, scanning the detection surface of the position by the ultrasonic probe 13, executing the step S5, finishing the position detection, executing the step S4;

s4, the ultrasonic probe 13 is moved to the next position manually to continue the detection, and the step S5 is executed;

s5, the processor 31 converts the received defect data information and the position information of the defect at the position into a three-dimensional image in a one-to-one correspondence manner;

the coupling agent is oil or vaseline;

the embodiment of the invention comprises the following steps: a time interval for detecting when the ultrasonic probe 13 moves from the previous position to the next position is defined;

in the embodiment of the invention, the workpiece 4 is a carbon fiber structure, specifically, the carbon fiber structure to be detected is horizontally arranged on an operation table and fixed, so that the carbon fiber structure to be detected is prevented from moving in the detection process, and the position of the carbon fiber structure in the X-axis direction and the position of the carbon fiber structure in the Y-axis direction are not accurate; the timer is timed on the operation table, and the time interval of each detection is specified, so that the detection efficiency and the accuracy are improved; coating a layer of oil on the surface of the ultrasonic probe 13 contacting the detection surface; selecting a position of a detection surface, contacting the ultrasonic probe 13 with the detection surface, scanning the detection surface at the position by the ultrasonic probe 13, corresponding, combining and processing the received defect data information and the position information of the defect at the position into an image by the processor 31, establishing a geometric model to obtain a three-dimensional image, and carrying out visual detection on the three-dimensional image to obtain a final visual three-dimensional image; performing binarization processing on the visible three-dimensional image, and analyzing to obtain a three-dimensional binarization image; after the completion of the position detection, the ultrasonic probe 13 is manually moved to the next position on the detection surface for detection, and the first position recorder 21 and the second position recorder 22 record the positions of the ultrasonic probe 13 after the movement, and the processor 31 performs an operation of receiving and processing the positions.

The first position recorder 21 and the second position recorder 22 record positions simultaneously with the detection by the ultrasonic probe 13, and the coupling agent is oil or vaseline.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.