A composite material cylinder member high-efficiency ultrasonic c-scan imaging method and detection device

Abstract

The application discloses a kind of composite material cylindrical member high-efficiency ultrasonic C scanning imaging method and automatic detection device, based on multiple helix stepwise scanning track mapping algorithm and C scanning imaging modulation algorithm, multiple helix stepwise scanning is formed using the relative motion of probe and turntable, and multiple probe fast scanning imaging is realized.The detection device includes motorized turntable, and servo motor is used to drive the rotation of cylindrical member;Three-jaw chuck is used to ensure that the center of the component is concentric with the rotating shaft of the turntable;U-shaped probe holder is used to install probe and water falling isolation device, and the problem of image quality affected by water falling splashing is solved;Motion control device is used to control probe to make multiple helix stepwise scanning, and characteristic signal output by ultrasonic flaw detector is collected in real time, and C scanning imaging is realized in real time by probe track real-time mapping algorithm module and imaging modulation algorithm module.C scanning imaging detection method and device can realize high-efficiency and fast scanning of composite material cylindrical member, and form high-quality C scanning image.

Description

Technical Field

[0001] This invention belongs to the field of ultrasonic automatic non-destructive testing technology for internal defects in composite materials, specifically relating to a high-efficiency ultrasonic C-scan imaging method and testing device for composite cylindrical components. Background Technology

[0002] Composite materials have been widely used both domestically and internationally due to their superior properties. Large cylindrical composite material components made from them are also extensively used as key load-bearing components in major aerospace equipment. Typically, internal defects are difficult to avoid during the manufacturing process of such components, necessitating ultrasonic testing to ensure component quality.

[0003] Currently, most automated inspection equipment uses a single probe for zigzag (or bow-shaped) circumferential stepping scanning. This means that after each complete scan of a large composite cylindrical component, the probe steps along the generatrix, repeating this process multiple times until the entire component is scanned. Due to these frequent stops, the inspection is very time-consuming and inefficient. For example, patent CN108318581A utilizes a 6-DOF industrial robot to hold an ultrasonic probe, automatically planning the probe's movement path without clamping or positioning the workpiece on a curved surface. It also ensures that the probe's acoustic beam is always perpendicularly incident on the curved surface during inspection, achieving real-time acquisition of the original A-wave and planar imaging at each scanning point. This solves the problem of clamping and positioning required for inspecting circular workpieces and improves the efficiency of curved surface tracking. However, it still uses a bow-shaped scanning imaging method, which still results in frequent stops. Furthermore, many organizations still perform conventional manual ultrasonic testing on composite cylindrical components, further reducing efficiency.

[0004] In addition, when performing water jet penetration testing on composite cylindrical components, especially when using a multi-probe longitudinal arrangement, the water sprayed from the upper probe's water jacket will inevitably splash onto the lower probe, causing noise in the C-scan image, severely affecting image quality and easily leading to misjudgment of results.

[0005] Therefore, it is necessary to propose a novel ultrasonic C-scan imaging detection technology for large composite cylindrical components to effectively solve the problem of rapid and high-quality visual detection of such components. Summary of the Invention

[0006] The purpose of this invention is to provide a high-efficiency ultrasonic C-scan imaging method and detection device for composite cylindrical components, so as to solve the technical problems of low detection efficiency of existing methods for large composite cylindrical components and the impact of water splashing on image quality during penetration detection when multiple probes are arranged longitudinally and sprayed.

[0007] The technical solution to achieve the purpose of this invention is as follows:

[0008] A high-efficiency ultrasonic C-scan imaging detection device for composite cylindrical components includes:

[0009] A turntable is used to drive composite cylindrical components to rotate continuously.

[0010] The clamping module is used to fix the composite cylindrical component and ensure that the rotation center of the composite cylindrical component is consistent with the rotation center of the turntable;

[0011] U-shaped probe holder is used to fix multiple probes arranged at equal intervals;

[0012] A multi-axis motion mechanism is used to drive the three-dimensional motion of the U-shaped probe frame to perform helical step scanning;

[0013] The ultrasonic probe is fixed in the water jacket, which is used to spray a stable flow of water as a medium for the propagation of ultrasonic waves between the probe and the composite cylindrical component.

[0014] A water circulation device is used to provide a stable water flow to the water jacket of the ultrasonic probe.

[0015] A water-fall isolation device is used to isolate water falling into the upper probe;

[0016] The data acquisition device is used to acquire the ultrasonic amplitude signal output by the flaw detector in real time.

[0017] The control and processing unit is used to transform the real-time trajectory points of multiple pairs of probes into real-time coordinate points on the two-dimensional C-scan image, and modulate the ultrasonic feature signals at the real-time trajectory points into pixel values ​​based on the ultrasonic amplitude signals output by the real-time ultrasonic flaw detector; and control the multi-axis motion mechanism to drive the probes on the U-shaped probe frame to perform multi-spiral step scans until all composite cylindrical components are scanned.

[0018] A high-efficiency ultrasonic C-scan imaging method for detecting composite cylindrical components, characterized by comprising the following steps:

[0019] Step S1: Place the composite cylindrical structure at the center of the turntable;

[0020] Step S2: Adjust the probe orientation so that the axis of the through-hole ultrasonic probe is perpendicular to the workpiece surface;

[0021] Step S3: Adjust the multi-channel digital ultrasonic flaw detector so that the electronic gate selects the transmitted waveform, and adjust the waveform amplitude of the defect-free part on the composite cylindrical component to 100%~110%. At this time, the analog electrical signal output by the ultrasonic flaw detector is A. m ;

[0022] Step S4: Drive N pairs of ultrasonic probes to move upward at a constant speed along the generatrix of the composite cylindrical component, while the turntable drives the composite cylindrical component to rotate at a constant speed to achieve multi-spiral scanning.

[0023] Step S5: The real-time trajectory points (θ) of N pairs of probes are mapped using a real-time probe trajectory mapping algorithm. i , l i Transformed into real-time coordinates (x) on a 2D C-scan image. i , y i );

[0024] Step S6, simultaneously the high-speed data acquisition card acquires real-time trajectory points (θ). i , l i The ultrasonic characteristic signal A(t) at point ) i Simultaneously, the imaging modulation algorithm will transmit the real-time trajectory points (θ) i , l i The ultrasonic amplitude signal at point (x) is modulated into pixel value P(x). i ,y i );

[0025] Step S7: After the spiral trajectory has filled the probe interval b, drive N pairs of probes (T1, T2, T3...T... N It accelerates upward along the busbar by (N-1)*b, which is a step-like movement.

[0026] Repeat the above steps when the turntable rotation angle returns to 0° until all composite cylindrical components have been scanned.

[0027] The significant advantages of this invention compared to existing technologies are:

[0028] (1) This invention proposes a multi-spiral step-scanning method, which enables multiple probes to simultaneously perform spiral scanning and C-scan imaging on large composite cylindrical components. Compared with the single-channel bow-shaped scanning method, the efficiency is increased by N times (N≥2), which greatly improves the detection efficiency.

[0029] (2) By setting up a water-fall isolation device between adjacent probes, the present invention achieves isolation of water falling into the water jacket of the upper probe, thereby improving the quality of C-scan images. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the multi-spiral step scanning imaging process in this invention.

[0031] Figure 2 This is a schematic diagram of the detection device based on a right-angle truss structure in this invention.

[0032] Figure 3 This is a schematic diagram of the detection device based on an industrial robot in this invention.

[0033] Figure 4 This is the imaging effect achieved by implementing the present invention. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] Combination Figures 1-3 The present invention provides a high-efficiency ultrasonic C-scan imaging detection method and apparatus for composite cylindrical components, comprising the following parts:

[0036] (1) Use N (N≥2) pairs of ultrasonic probes to perform multi-helical step scans. Between the same pair of ultrasonic probes, one emits ultrasonic waves and the other receives ultrasonic waves. The number N can be selected according to the generatrix length of the composite cylindrical component. The trajectory point of the Kth probe. Coordinates of 2D C-scan image The real-time trajectory mapping algorithm between them is as follows:

[0037]

[0038] In the formula, This indicates the angle of rotation of the probe relative to the workpiece, which is acquired in real time via a turntable encoder. — This represents the distance the T1 probe moves along the busbar, which is obtained in real time via the Z-axis encoder; m and n represent the size of the entire two-dimensional planar image; i and j are the index values ​​of a two-dimensional planar image; This represents the set of trajectory points formed when any one (K) of N ultrasonic probes scans a composite material component. This represents the set of coordinates of the two-dimensional image formed by imaging. (x) i y i ) represents the corresponding coordinates of the probe at any point i on the two-dimensional plane image, L represents the generatrix length of the conical composite component, R represents the large-end radius of the conical composite component, and r represents the small-end radius of the conical composite component.

[0039] (2) The C-scan image is 8-bit grayscale or color, and linear interpolation is used for continuous modulation of 0~255 levels. The grayscale imaging modulation algorithm is as follows: The color imaging modulation algorithm is as follows: ,

[0040] , , ;

[0041] in This indicates that when using grayscale imaging, any point on the image... The pixel value at point A mA(t) represents the highest amplitude of the ultrasound signal. i () represents the ultrasonic amplitude signal when the probe moves to any point, 255 / A m Indicates the slope. P represents the RGB value of a pixel in the image. M represents the value of the ultrasonic amplitude signal A(t). i The conversion relationship between the RGB color values ​​at the image pixels and the color values ​​at the image pixels. Represents the ultrasonic amplitude signal A(t) at any point i The voltage signal value converted from ) This represents the RGB values ​​of an image expressed in matrix form.

[0042] (3) N pairs of ultrasonic probes are symmetrically mounted on a U-shaped probe frame. The N pairs of probes are driven by the same motion axis to move upward at a constant speed along the generatrix. The vertical interval b between each probe on one side is evenly arranged, and the center is a straight line.

[0043] (4) During the scanning process, the composite cylindrical component is driven by the electric turntable to rotate continuously at a constant speed;

[0044] (5) The specific testing steps include:

[0045] Step S1: Place the composite cylindrical structure at the center of the turntable of the multi-channel mechanical scanning device;

[0046] Step S2: Adjust the probe orientation so that the axis of the through-hole ultrasonic probe is perpendicular to the workpiece surface;

[0047] Step S3: Adjust the multi-channel digital ultrasonic flaw detector so that the electronic gate selects the transmitted waveform, and adjust the waveform amplitude of the defect-free part on the composite cylindrical component to 100%~110%. At this time, the analog electrical signal output by the ultrasonic flaw detector is A. m ;

[0048] Step S4, the U-shaped probe holder drives N pairs of ultrasound probes (T1, T2, T3…T… N The component moves upward at a constant speed along the generatrix of the composite cylindrical component, while the turntable drives the composite cylindrical component to rotate at a high speed and constant speed, thus realizing multi-spiral scanning.

[0049] Step S5: The N pairs of probes (T1, T2, T3…T…) are mapped in real time using a probe trajectory mapping algorithm. N Real-time trajectory points (θ) i ,l i Transformed into real-time coordinates (x) on a 2D C-scan image. i , y i );

[0050] Step S6, simultaneously the high-speed data acquisition card acquires real-time trajectory points (θ). i , l iThe ultrasonic amplitude signal A(t) at point ) i );

[0051] Step S7, simultaneously the imaging modulation algorithm transmits the real-time trajectory points (θ) i , l i The ultrasonic amplitude signal at point (x) is modulated into pixel value P(x). i , y i );

[0052] Step S8: After the spiral trajectory has filled the probe interval b, the U-shaped probe holder drives N pairs of probes (T1, T2, T3...T... N It accelerates upward along the busbar by (N-1)*b, which is a step-like movement.

[0053] Step S9: When the turntable rotation angle returns to 0°, repeat steps S4 to S8 until all composite cylindrical components have been scanned.

[0054] The multi-spiral step-scanning method involves multiple pairs of ultrasonic probes moving upwards at a constant speed v (mm / s) parallel to the generatrix L of the composite cylindrical component during scanning. Simultaneously, a turntable drives the component to rotate continuously counterclockwise at a constant speed w (° / s). The helical spacing is l, and the three elements satisfy the following mathematical relationship: After the spiral trajectory line fills the distance b between two adjacent probes, multiple pairs of ultrasonic probes are driven by the motor to accelerate at an acceleration a (mm / s²). 2 Move upwards rapidly along the busbar L by (N-1)*b, satisfying b=k*l, where k is a positive integer.

[0055] The multi-channel mechanical scanning device of the present invention includes:

[0056] Electric turntable 1 is used to drive the composite cylindrical component to rotate continuously, and the drive motor is a servo motor.

[0057] The three-jaw chuck 2 is used to fix the composite cylindrical component and ensure that the rotation center of the component is consistent with the rotation center of the turntable;

[0058] U-shaped probe bracket 5 is used to fix multiple probes arranged at equal intervals to ensure that the acoustic beam lines between individual probe pairs coincide. The water jackets of the probes on one side are parallel and the interval is b, which is recommended to be 50~100mm. A water-fall isolation device is arranged between the two probes on one side.

[0059] 4. Ultrasonic probe and water jacket: The ultrasonic probe is fixed in the water jacket. The water jacket is used to spray a water flow with a stable velocity as a medium for the propagation of ultrasonic waves between the probe and the composite cylindrical component. The probe is a water immersion probe with a recommended frequency of 2~5MHz.

[0060] The multi-axis motion mechanism 6 is used to drive the U-shaped probe frame 5 to achieve X, Y, and Z direction movement. It can be a motion mechanism in the form of a rectangular coordinate truss structure or a six-axis industrial robot.

[0061] The water circulation device 7 includes a water pump and a water pipe, which is used to provide a stable water flow to the water jacket of the ultrasonic probe.

[0062] Air source 8 is used to supply compressed air to the water-repellent isolation device 3;

[0063] Electrical control cabinet 9 is used for equipment power configuration and control device installation;

[0064] The multi-channel ultrasonic flaw detector 10 is used to excite and receive ultrasonic waves and output analog electrical signals corresponding to the waveform under the electronic gate. It is recommended to select equipment with a repetition frequency of not less than 1000Hz / channel.

[0065] Data acquisition device 11 (high-speed data acquisition card) is used to acquire the analog characteristic electrical signals output by the flaw detector in real time. It is recommended to use a device with a sampling frequency greater than 100K / S / channel.

[0066] Computer 12 is used to control the multi-axis motion mechanism to drive the probe on the U-shaped probe holder to perform multi-spiral step scanning, and to acquire the characteristic signal A(t) output by the ultrasonic flaw detector in real time. i Meanwhile, the probe trajectory real-time mapping algorithm module (see above (1) for details) and the imaging modulation algorithm module perform C-scan imaging in real time (see above (2) for details).

[0067] The water-fall isolation device isolates the probes from falling into water by setting a flat air nozzle between two adjacent probes to spray a flat airflow at high speed. The airflow speed is 10~15m / s, the airflow thickness is 1~2mm, and the width is 30~50mm.

[0068] Example 1

[0069] This embodiment of a high-efficiency ultrasonic C-scan imaging method for composite cylindrical components includes the following steps:

[0070] (1) Three pairs of ultrasonic probes (T1, T2, T3) are used to perform multi-spiral step scans. Between the same pair of ultrasonic probes, one emits ultrasonic waves and the other receives ultrasonic waves. The trajectory point of the Kth pair of probes is... Coordinates of 2D C-scan image The real-time trajectory mapping algorithm between them is as follows:

[0071]

[0072] In the formula, —This indicates the angle of rotation of the probe relative to the workpiece, which is acquired in real time via a turntable encoder. —This represents the distance that the T1 probe moves along the busbar, which is obtained in real time via the Z-axis encoder;

[0073] The multi-spiral step scanning process is as follows: the turntable 1 drives the composite cylindrical component 13 to rotate at a constant speed, while the multi-axis motion mechanism 6 drives the U-shaped arm 5 to move along the Z-axis, so that the three pairs of ultrasonic probes rise rapidly along the generatrix of the composite cylindrical component 13. Imaging is performed in real time during the movement of both. After probe T1 completely covers the gap b between T1 and T2, the U-shaped arm 5 drives the probes (T1, T2, T3) to move up 2b to the position of probe T2 (no imaging is performed during the step, and imaging continues when the step is completed and the turntable rotates back to the starting point). Then the above process is repeated.

[0074] (2) The C-scan image is 8-bit grayscale or color, and linear interpolation is used for continuous modulation of 0~255 levels. The grayscale imaging modulation algorithm is as follows: The color imaging modulation algorithm is as follows: ,

[0075] , , ;

[0076] (3) Three pairs of ultrasonic probes (T1, T2, T3) are symmetrically mounted on a U-shaped probe holder. The three pairs of probes are driven by the same motion axis to move upward at a constant speed along the axis. The vertical interval b between each probe on one side is evenly arranged, and the center is a straight line.

[0077] (4) During the scanning process, the composite cylindrical component is driven by the electric turntable to rotate continuously at a constant speed;

[0078] (5) The specific testing steps include:

[0079] Step S1: Place the composite cylindrical structure at the center of the turntable of the multi-channel mechanical scanning device;

[0080] Step S2: Adjust the probe orientation so that the axis of the through-hole ultrasonic probe is perpendicular to the workpiece surface;

[0081] Step S3: Adjust the multi-channel digital ultrasonic flaw detector so that the electronic gate selects the transmitted waveform, and adjust the waveform amplitude of the defect-free part on the composite cylindrical component to 100%~110%. At this time, the analog electrical signal output by the ultrasonic flaw detector is A. m ;

[0082] In step S4, the U-shaped probe frame drives three pairs of ultrasonic probes (T1, T2, T3) to move upward at a constant speed along the generatrix of the composite cylindrical component. At the same time, the turntable drives the composite cylindrical component to rotate at a high speed and at a constant speed to achieve multi-spiral scanning.

[0083] Step S5: The real-time trajectory points (θ) of the three pairs of probes (T1, T2, T3) are mapped using a real-time probe trajectory mapping algorithm. i , l i Transformed into real-time coordinates (x) on a 2D C-scan image. i , y i );

[0084] Step S6, simultaneously the high-speed data acquisition card acquires real-time trajectory points (θ). i , l i The ultrasonic characteristic signal A(t) at point ) i );

[0085] Step S7, simultaneously the imaging modulation algorithm transmits the real-time trajectory points (θ) i , l i The ultrasonic feature signal at point (x) is modulated into pixel value P(x). i , y i );

[0086] Step S8: After the spiral trajectory has filled the probe interval b, the U-shaped probe frame drives the three pairs of probes (T1, T2, T3) to move upward 2b along the axis to the probes (T1', T2', T3'), which is a step movement;

[0087] Step S9: When the turntable rotates to 0°, repeat steps S4 to S8 until all composite cylindrical components have been scanned. Figure 4 This is an imaging effect diagram of an embodiment of the present invention.

[0088] Example 2

[0089] The multi-channel mechanical scanning device in this embodiment specifically includes:

[0090] Electric turntable 1 is used to drive the composite cylindrical component to rotate at a constant speed. The drive motor is a servo motor and is installed on the ground.

[0091] The three-jaw chuck 2 is used to fix the composite cylindrical component and ensure that the rotation center of the component is consistent with the rotation center of the turntable, and is connected to the turntable 1;

[0092] U-shaped probe bracket 5 is used to fix the probe and ensure that the acoustic beams between the probe pairs coincide. The water jackets of the probes on one side are parallel and spaced by b, which is recommended to be 50~100mm. A water-fall isolation device is arranged between the two probes on one side. The U-shaped probe bracket is mounted on the multi-axis motion mechanism 6.

[0093] 4. Ultrasonic probe and water jacket: The ultrasonic probe is fixed in the water jacket. The water jacket is used to spray a water flow with a stable velocity as a medium for the propagation of ultrasonic waves between the probe and the composite cylindrical component. The probe is a water immersion probe with a recommended frequency of 2~5MHz.

[0094] The multi-axis motion mechanism 6 is connected to the U-shaped probe holder and enables the probe to move in the X, Y, and Z directions. It can be implemented using... Figure 2 The rectangular coordinate truss structure shown can also be adopted. Figure 3 The six-axis industrial robot shown;

[0095] The water circulation device 7, including a water pump and water pipes, is used to provide a stable water flow to the water jacket of the ultrasonic probe and is installed on the ground.

[0096] Air source 8 is used to supply compressed air to the water isolation device 3, and is connected to the water isolation device on the U-shaped probe frame 5 through an air pipe;

[0097] Electrical control cabinet 9 is used for equipment power configuration and control device installation;

[0098] The multi-channel ultrasonic flaw detector 10 is used to excite and receive ultrasonic waves and output analog electrical signals corresponding to the waveform under the electronic gate. It is recommended to select equipment with a repetition frequency of not less than 1000Hz / channel, install it in the computer, and connect it to the ultrasonic probe through a cable.

[0099] Data acquisition device 11 is used to acquire the analog characteristic electrical signals output by the flaw detector in real time. It is recommended to use a device with a sampling frequency greater than 100K / S / channel. It is installed in a computer and connected to the multi-channel ultrasonic flaw detector 10 via a cable.

[0100] Computer software 12 is used to control the multi-axis motion mechanism to drive the probe on the U-shaped probe holder to perform multi-spiral step scanning, and to acquire the characteristic signal A(t) output by the ultrasonic flaw detector in real time. i Simultaneously, C-scan imaging is performed in real time by the probe trajectory real-time mapping algorithm module and the imaging modulation algorithm module.

[0101] Combination Figure 2 , Figure 3 The water-fall isolation device is used to isolate the water falling from above by setting a flat air nozzle between two adjacent probes to spray a flat airflow at high speed, so as not to interfere with the imaging effect. The airflow speed is 10~15m / s, the airflow thickness is 1~2mm, and the width is 30~50mm.

Claims

1. A high-efficiency ultrasonic C-scan imaging detection device for composite cylindrical components, characterized in that, include: A turntable is used to drive composite cylindrical components to rotate continuously. The clamping module is used to fix the composite cylindrical component and ensure that the rotation center of the composite cylindrical component is consistent with the rotation center of the turntable; U-shaped probe holder is used to fix multiple probes arranged at equal intervals; A multi-axis motion mechanism is used to drive the three-dimensional motion of the U-shaped probe frame to perform helical step scanning; The ultrasonic probe is fixed in the water jacket, which is used to spray a stable flow of water as a medium for the propagation of ultrasonic waves between the probe and the composite cylindrical component. A water circulation device is used to provide a stable water flow to the water jacket of the ultrasonic probe. A water-fall isolation device is used to isolate water falling from the upper probe; the water-fall isolation device achieves isolation of water falling from the upper probe by spraying a flat airflow from a flat air nozzle set between two adjacent probes. It is equipped with an isolation air source to supply compressed air to the water-drop isolation device; The data acquisition device is used to acquire the ultrasonic amplitude signal output by the flaw detector in real time. The control and processing unit is used to transform the real-time trajectory points of multiple pairs of probes into real-time coordinate points on the two-dimensional C-scan image, and modulate the ultrasonic feature signals at the real-time trajectory points into pixel values ​​based on the ultrasonic amplitude signals output by the real-time ultrasonic flaw detector; and control the multi-axis motion mechanism to drive the probes on the U-shaped probe frame to perform multi-spiral step scans until all composite cylindrical components are scanned. The process of transforming real-time trajectory points into real-time coordinate points on a 2D C-scan image is as follows: In the formula (x i y i () represents the coordinates of the Kth probe at any point i on the two-dimensional plane image. This indicates the angle of rotation of the probe relative to the workpiece. The distance the probe moves along the generatrix is ​​represented by L, the length of the generatrix of the conical composite component is represented by R, the radius of the large end of the conical composite component is represented by r, the radius of the small end of the conical composite component is represented by b, the vertical spacing between the probes is represented by , and the conversion relationship between the ultrasonic amplitude signal and the RGB color value at the image pixel is represented by .

2. The high-efficiency ultrasonic C-scan imaging detection device for composite cylindrical components according to claim 1, characterized in that, Multi-spiral step scan satisfies: b=k*l v is the moving speed of the ultrasonic probe parallel to the generatrix of the composite cylindrical component, w is the rotational speed of the composite cylindrical component driven by the turntable, l is the helical spacing, b represents the vertical spacing between probes, and k is a positive integer.

3. The high-efficiency ultrasonic C-scan imaging detection device for composite cylindrical components according to claim 1, characterized in that, The ultrasonic feature signals at the real-time trajectory points are modulated into grayscale. The grayscale imaging modulation algorithm is as follows: in This indicates that when using grayscale imaging, any point on the image... The pixel value at point A m A(t) represents the highest amplitude of the ultrasound signal. i () represents the amplitude of the ultrasonic signal when the probe moves to any point.

4. The high-efficiency ultrasonic C-scan imaging detection device for composite cylindrical components according to claim 1, characterized in that, The ultrasonic feature signals at the real-time trajectory points are modulated into color, and the color imaging modulation algorithm is as follows: ， P represents the RGB value of a pixel in the image, and M represents the value of the ultrasonic amplitude signal A(t). i The conversion relationship between RGB color values ​​at image pixels and the image pixel values. Represents the ultrasonic amplitude signal A(t) at any point i The voltage signal value converted from ) A m This indicates the highest amplitude of the ultrasonic signal.

5. A method for high-efficiency ultrasonic C-scan imaging detection of composite cylindrical components, utilizing the high-efficiency ultrasonic C-scan imaging detection device for composite cylindrical components according to any one of claims 1-4, characterized in that, Includes the following steps: Step S1: Place the composite cylindrical structure at the center of the turntable; Step S2: Adjust the probe orientation so that the axis of the through-hole ultrasonic probe is perpendicular to the workpiece surface; Step S3: Adjust the multi-channel digital ultrasonic flaw detector so that the electronic gate selects the transmitted waveform, and adjust the waveform amplitude of the defect-free part on the composite cylindrical component to 100%~110%. At this time, the analog electrical signal output by the ultrasonic flaw detector is A. m ; Step S4: Drive N pairs of ultrasonic probes to move upward at a constant speed along the generatrix of the composite cylindrical component, while the turntable drives the composite cylindrical component to rotate at a constant speed to achieve multi-spiral scanning. Step S5: The real-time trajectory points (θ) of N pairs of probes are mapped using a real-time probe trajectory mapping algorithm. i , l i Transformed into real-time coordinates (x) on a 2D C-scan image. i , y i ); Step S6, simultaneously the high-speed data acquisition card acquires real-time trajectory points (θ). i , l i The ultrasonic characteristic signal A(t) at point ) i Simultaneously, the imaging modulation algorithm will transmit the real-time trajectory points (θ) i , l i The ultrasonic amplitude signal at point (x) is modulated into pixel value P(x). i , y i ); Step S7: After the spiral trajectory has filled the probe interval b, drive N pairs of probes (T1, T2, T3...T... N It accelerates upward along the busbar by (N-1)*b, which is a step-like movement. Repeat the above steps when the turntable rotation angle returns to 0° until all composite cylindrical components have been scanned.

6. The high-efficiency ultrasonic C-scan imaging method for composite cylindrical components according to claim 5, characterized in that, The process of transforming real-time trajectory points into real-time coordinate points on a 2D C-scan image is as follows: In the formula (x i y i () represents the coordinates of the Kth probe at any point i on the two-dimensional plane image. This indicates the angle of rotation of the probe relative to the workpiece. The distance the probe moves along the generatrix is ​​represented by L, the length of the generatrix of the conical composite component is represented by R, the radius of the large end of the conical composite component is represented by r, the radius of the small end of the conical composite component is represented by b, the vertical spacing between the probes is represented by , and the conversion relationship between the ultrasonic amplitude signal and the RGB color value at the image pixel is represented by .

7. The high-efficiency ultrasonic C-scan imaging method for composite cylindrical components according to claim 5, characterized in that, Multi-spiral step scan satisfies: b=k*l v is the moving speed of the ultrasonic probe parallel to the generatrix of the composite cylindrical component, w is the rotational speed of the composite cylindrical component driven by the turntable, l is the helical spacing, b represents the vertical spacing between probes, and k is a positive integer.

8. The high-efficiency ultrasonic C-scan imaging method for composite cylindrical components according to claim 5, characterized in that, The ultrasonic feature signals at the real-time trajectory points are modulated into color, and the color imaging modulation algorithm is as follows: ， P represents the RGB value of a pixel in the image, and M represents the value of the ultrasonic amplitude signal A(t). i The conversion relationship between RGB color values ​​at image pixels and the image pixel values. Represents the ultrasonic amplitude signal A(t) at any point i The voltage signal value converted from ) A m This indicates the highest amplitude of the ultrasonic signal.

Images