A non-destructive testing device and method based on radiographic DR imaging

Abstract

The application discloses a kind of nondestructive testing device and method based on ray DR imaging, including base;The part on the first conveying belt is continuously entered into the conveying plate on the turntable, and the part on the conveying plate is conveyed to the receiving plate for detection by the continuous rotation of the turntable, without manual detection, thereby improving the detection effect, and realizing batch detection of parts;At the same time, the device can transport the parts at high level to low level layer by layer by setting the turntable. In the production process, the equipment for producing parts is often located at a high place. By setting the turntable, the parts at high level can be transported to low place through the transfer of the turntable. On the one hand, it is convenient to transport the high level down, and on the other hand, it is convenient to observe the detection process.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of DR imaging nondestructive testing devices, in particular to a nondestructive testing device based on DR imaging. BACKGROUND

[0002] DR imaging is the abbreviation of digital radiography, which is a method of using digital technology for radiographic imaging. It is the digital improvement and replacement of traditional radiographic imaging technology (commonly known as film radiographic imaging).

[0003] DR imaging uses radiation (usually X-rays) to penetrate the object being detected, and uses a digital detector to convert the radiation that has passed through the object into electrical signals. After amplification, digitization and processing, high-quality digital images are formed. Compared with traditional film imaging, DR imaging has more advantages, such as high resolution, real-time imaging, digital data storage and processing, etc.

[0004] When the parts are completed, the parts need to be checked, and the existing technology usually uses DR imaging technology to nondestructively test the parts, and the parts are usually checked by sampling inspection, which will cause unqualified parts to be unable to be checked, reducing the quality of the parts. The existing imaging algorithm has problems in image processing and reconstruction, and the software needs to be improved.

[0005] Therefore, we propose a device that can automatically perform DR imaging nondestructive testing on parts. SUMMARY

[0006] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a nondestructive testing device based on DR imaging.

[0007] To solve the above technical problems, the basic idea of the technical solution adopted by the present application is: a nondestructive testing device based on DR imaging, comprising a base, further comprising: a first conveyor belt for conveying parts to be detected; a turntable rotatably arranged on the base, a plurality of mounting grooves are arranged circumferentially on the turntable, and a conveying plate for carrying parts is arranged in each mounting groove; a receiving plate and a transmitting source are arranged on one side of the turntable respectively for detecting when the parts on the conveying plate fall on the receiving plate; and an upward mechanism for pushing the parts that have completed detection away from the receiving plate.

[0008] Preferably, it further comprises a data processing module installed on the base for collecting data of the receiving plate and processing to obtain detection results, which are displayed on the display screen.

[0009] During operation, the emission source control sequence is controlled, and the X-ray image is encoded using a mask with a deterministic structure to obtain the encoded X-ray image. This step is equivalent to subsampling the X-ray image, reducing the amount of data.

[0010] Then, the encoded X-ray image is acquired through a receiving board to obtain a digitized X-ray image signal. This step is equivalent to quantizing the X-ray image, thus realizing the digitization of the data.

[0011] The data processing module works as follows: It receives data from the acquisition board and uses an image reconstruction module based on sparse reconstruction algorithms or wavelet transform to reconstruct the digitized X-ray image signal, obtaining a high-quality DR image. This step decodes the X-ray image, restoring the integrity of the data.

[0012] The data processing procedure of the image reconstruction module can also be:

[0013] Convert the input image from RGB to grayscale.

[0014] Apply wavelet transform to each image and obtain four sub-bands.

[0015] Different fusion rules are applied to different subbands. For example, an average rule can be used for the LL subband, a maximum rule for the LH and HL subbands, and a minimum rule for the HH subband.

[0016] Apply inverse wavelet transform to the fused subbands to obtain the final fused image.

[0017] In this embodiment, the idea is to decompose the input image into different frequency bands and extract features from them. The image is decomposed into four sub-bands: low-low (LL), low-high (LH), high-low (HL), and high-high (HH). The LL sub-band contains coarse information about the image, while the other three sub-bands contain edge and texture information. By applying different fusion rules, such as average, maximum, or minimum values, to the different sub-bands, a fused image that incorporates information from different modalities can be obtained.

[0018] Preferably, a first connecting shaft and a second connecting shaft are fixedly connected to both ends of the conveyor plate, the first connecting shaft is rotatably connected to the side wall of the mounting groove, a first guide groove is provided on the side wall of the mounting groove, and the second connecting shaft is slidably connected in the first guide groove; it also includes: a connecting rod, one end of the connecting rod is rotatably connected to the bottom surface of the conveyor plate, a bracket is fixedly connected to the bottom surface of the turntable, the connecting rod is slidably connected in the slide groove of the bracket, a tension spring is sleeved on the connecting rod, one end of the tension spring is fixedly connected to the bracket, and the other end of the tension spring is fixedly connected to the end of the connecting rod near the bottom surface of the conveyor plate.

[0019] Preferably, the base is fixedly connected with an arc-shaped boss on one side close to the receiving plate, and the connecting rod is connected with the arc-shaped boss at the end.

[0020] Further, the conveying plate is provided with an air outlet hole.

[0021] Preferably, the rotating disc is provided with a second air duct, the conveying plate is provided with a first air duct, the second air duct corresponds to a corresponding hole in the first air duct, the second connecting shaft is fixedly connected with a baffle, and the baffle is located in the first guide groove to control the opening and closing of the second air duct and the first air duct.

[0022] Preferably, the lifting mechanism comprises a connecting plate provided with a second guide groove and a third guide groove, the second guide groove is linear, the third guide groove is arc-shaped, the connecting plate is located on both sides of the receiving plate, one end of the receiving plate is slidably connected in the second guide groove, and one end of the receiving plate close to the rotating disc is slidably connected in the third guide groove.

[0023] Preferably, the base is provided with a rodless cylinder, the connecting rod is fixedly connected to the sliding seat of the rodless cylinder, the guide groove plate is installed on the bottom surface of the receiving plate, and one end of the connecting rod is slidably connected in the guide groove plate.

[0024] Preferably, the device further comprises a second conveying belt located on one side of the receiving plate to batch convey the detected parts away from the receiving plate.

[0025] Preferably, the base is fixedly connected with a motor, and the output end of the first motor is fixedly connected with the bottom surface of the rotating disc.

[0026] A use method of a non-destructive testing device based on DR imaging mainly comprises the following steps:

[0027] S1, the parts are continuously conveyed to the rotating disc by the first conveying belt, and the parts are transferred to one side close to the receiving plate by the rotating disc;

[0028] S2, when the parts on the rotating disc move to one side of the receiving plate, one end of the conveying plate is lifted to make the parts on the conveying plate slide onto the receiving plate, and then the X-ray is emitted to the receiving plate by the emitting source to detect the parts on the receiving plate;

[0029] S3, when the parts on the receiving plate are detected, one end of the receiving plate is lifted to make the parts separate from the receiving plate, thereby realizing batch detection of the parts.

[0030] Compared with the prior art, the present application has the following beneficial effects: the parts on the first conveying belt are continuously fed onto the conveying plate on the rotating disc, and the rotating disc continuously rotates to feed the parts on the conveying plate to the receiving plate for detection, without manual detection, thereby improving the detection effect and realizing batch detection of the parts.

[0031] Meanwhile, the device can feed the parts at high positions to low positions layer by layer by setting the rotating disc. In the production process, the equipment for producing the parts is often located at a high position. By setting the rotating disc, the parts at the high position can be fed to the low position through the transfer of the rotating disc. On the one hand, the parts at the high position can be conveniently fed down, and on the other hand, the detection can be located at the low position, which is convenient for observing the detection process.

[0032] When the device detects the injection molded parts, the injection molded parts have a certain temperature. By setting the rotating disc, the injection molded parts can be cooled through the air outlet hole when being fed to the rotating disc through the first conveying belt, so as to facilitate rapid cooling of the injection molded parts and subsequent manual sorting. Meanwhile, when the conveying plate is lifted at one end to feed the parts to the receiving plate, the gas blown out by the air outlet hole can make the parts on the conveying plate quickly slide to the receiving plate, avoiding adhesion of the parts on the conveying plate. BRIEF DESCRIPTION OF DRAWINGS

[0033] In the drawings:

[0034] Figure 1 A three-dimensional structure diagram of a non-destructive testing device based on DR imaging is provided for the present application Figure One ;

[0035] Figure 2 A structure diagram of the non-destructive testing device based on DR imaging in position A is provided for the present application Figure 1 ;

[0036] Figure 3 A three-dimensional structure diagram of a non-destructive testing device based on DR imaging is provided for the present application Figure Two ;

[0037] Figure 4 A structure diagram of the non-destructive testing device based on DR imaging in position B is provided for the present application Figure 3 ;

[0038] Figure 5 A structure diagram of a non-destructive testing device based on DR imaging is provided for the present application

[0039] Figure 6A second guide groove and a third guide groove structure diagram of a nondestructive testing device based on DR imaging of the present application;

[0040] Figure 7 A motor structure diagram of a nondestructive testing device based on DR imaging of the present application;

[0041] Figure 8 A conveying plate structure diagram of a nondestructive testing device based on DR imaging of the present application;

[0042] Figure 9 A connecting rod and guide groove plate structure diagram of a nondestructive testing device based on DR imaging of the present application;

[0043] Figure 10 A non-rod cylinder structure diagram of a nondestructive testing device based on DR imaging of the present application;

[0044] Figure 11 An installation groove structure diagram of a nondestructive testing device based on DR imaging of the present application.

[0045] In the figure: 1, rotating disc; 11, installation groove; 111, conveying plate; 112, first connecting shaft; 113, second connecting shaft; 114, corresponding hole; 115, first guide groove; 116, baffle; 117, air outlet hole; 118, first air channel; 119, second air channel; 12, base; 13, motor; 14, first conveying belt; 15, connecting rod; 151, tension spring; 152, support; 2, receiving plate; 21, connecting plate; 22, second guide groove; 23, third guide groove; 24, non-rod cylinder; 25, connecting rod; 26, guide groove plate; 27, mounting bracket; 28, emission source; 3, second conveying belt. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0047] EMBODIMENT

[0048] REFERENCE Figures 1 to 11The utility model provides a kind of nondestructive testing device based on ray DR imaging, including base 12, still include: first conveyor belt 14, to convey the part to be detected;Rotary disc 1, rotation is arranged on base 12, rotary disc 1 is peripherally provided with a plurality of installation slot 11, installation slot 11 is provided with the conveying plate 111 for carrying part;Receiving plate 2, emitting source 28 are respectively arranged in rotary disc 1 side, mounting bracket 27 is installed on base 12, emitting source 28 is installed on mounting bracket 27, to detect when the part on conveying plate 111 falls on receiving plate 2;Lifting mechanism, to push the part after detection is completed away from receiving plate 2;

[0049] The utility model discloses when using, the part after manufacturing is conveyed to rotary disc 1 by first conveyor belt 14, to convey the part batch to rotary disc 1;

[0050] One end of first conveyor belt 14 is close to rotary disc 1, when the part on first conveyor belt 14 is conveyed to the conveying plate 111 on rotary disc 1, rotary disc 1 is controlled to rotate, and the part on conveying plate 111 is transferred to the side close to receiving plate 2, conveying plate 111 one end is lifted at this time, so that the part on conveying plate 111 slides to receiving plate 2, and then emitting source 28 emits X-ray, and DR imaging detection is carried out on the part on receiving plate 2;

[0051] And after detection is completed, the part on receiving plate 2 is separated from receiving plate 2 by lifting mechanism;

[0052] The utility model discloses that the part on first conveyor belt 14 is continuously entered to the conveying plate 111 on rotary disc 1, and the part on conveying plate 111 is conveyed to receiving plate 2 for detection by the continuous rotation of rotary disc 1, without manual detection, to improve the detection effect, and realize batch detection of part;

[0053] Rotary disc 1 is provided with four installation slots 11, so that the part on first conveyor belt 14 can be continuously entered to conveying plate 111 and conveyed to receiving plate 2 for detection, to further improve the efficiency of batch detection;

[0054] Meanwhile, the utility model can convey the part at high position to low position layer by layer by setting rotary disc 1, part of the part is often located at high position in production process, and the equipment for producing the part is often located at high position, and the part at high position can be conveyed to low position by rotary disc 1, on the one hand, the part at high position can be conveniently conveyed down, and on the other hand, the detection can be located at low position, to facilitate observation of detection process;

[0055] By setting first conveyor belt 14 as inclined, the part at high position can be further conveyed to low position.

[0056] In one embodiment, the two ends of the conveying plate 111 are fixedly connected with the first connecting shaft 112 and the second connecting shaft 113, respectively, the first connecting shaft 112 is rotationally connected on the side wall of the mounting groove 11, the first guide groove 115 is formed on the side wall of the mounting groove 11, and the second connecting shaft 113 is slidingly connected in the first guide groove 115; further comprising: a connecting rod 15, one end of the connecting rod 15 is rotationally connected on the bottom surface of the conveying plate 111, the bracket 152 is fixedly connected on the bottom surface of the rotating disc 1, the connecting rod 15 is slidingly connected in the sliding groove of the bracket 152, the tension spring 151 is sleeved on the connecting rod 15, one end of the tension spring 151 is fixedly connected with the bracket 152, and the other end of the tension spring 151 is fixedly connected on the end of the connecting rod 15 close to the bottom surface of the conveying plate 111;

[0057] When the conveying plate 111 with parts is conveyed to the side of the receiving plate 2 through the rotating disc 1, the connecting rod 15 is driven to move upward, the connecting rod 15 pushes the second connecting shaft 113 at one end of the conveying plate 111 close to the center of the rotating disc 1, so that one end of the conveying plate 111 is lifted, and then the parts on the conveying plate 111 fall onto the receiving plate 2;

[0058] When the connecting rod 15 pushes the conveying plate 111, the first connecting shaft 112 at one end of the conveying plate 111 rotates, and the second connecting shaft 113 slides in the first guide groove 115; the first guide groove 115 can guide the second connecting shaft 113, so that one end of the conveying plate 111 is stably lifted;

[0059] When one end of the conveying plate 111 is lifted, the tension spring 151 is stretched, and when the conveying plate 111 moves away from the receiving plate 2, the tension spring 151 pulls down one end of the conveying plate 111, so that the conveying plate 111 is in a horizontal state;

[0060] It should be understood that the first guide groove 115 is arc-shaped.

[0061] In one embodiment, the arc-shaped boss 16 is fixedly connected on the side of the base 12 close to the receiving plate 2, and the end of the connecting rod 15 corresponds to the arc-shaped boss 16;

[0062] When the rotating disc 1 rotates, the rotating disc 1 drives the connecting rod 15 to move towards the receiving plate 2, and one end of the connecting rod 15 is driven upward by the arc shape of the outer wall of the arc-shaped boss 16, so that the connecting rod 15 is driven to move upward without other electrical elements, and the resetting of the connecting rod 15 is realized through the tension spring 151.

[0063] In one embodiment, the lifting of the conveying plate 111 can be realized by setting a pneumatic cylinder, one end of the pneumatic cylinder is rotationally connected on the bottom of the rotating disc 1, and the telescopic end of the pneumatic cylinder is rotationally connected with the conveying plate 111; the telescopic end of the pneumatic cylinder is extended or retracted to drive one end of the conveying plate 111 to be lifted and reset;

[0064] And in the device by setting the arc boss 16, connecting rod 15, relative to the way using the cylinder, can save the device cost of driving the conveying plate 111 one end up, and further reduce the cost of device manufacturing.

[0065] In one embodiment, the conveying plate 111 is provided with an air outlet hole 117, which can blow the parts on the conveying plate 111 to achieve the cleaning effect of the parts.

[0066] When the device detects the injection molded parts, the just injection molded parts have a certain temperature, and the temperature of the injection molded parts can be reduced through the air outlet hole 117 when the injection molded parts are conveyed to the turntable 1 by the first conveying belt 14, which is convenient for the rapid cooling of the injection molded parts and the subsequent manual sorting.

[0067] At the same time, when the conveying plate 111 one end up, the gas discharged from the air outlet hole 117 can make the parts on the conveying plate 111 quickly slide to the receiving plate 2, avoiding the adhesion of the parts on the conveying plate 111.

[0068] In one embodiment, the turntable 1 is provided with a second air duct 119, and the conveying plate 111 is provided with a first air duct 118, the second air duct 119 corresponds to the corresponding hole 114 on the first air duct 118, the air outlet hole 117 is connected with the first air duct 118, and the second connecting shaft 113 is fixedly connected with the baffle 116, which is located in the first guide groove 115 to control the opening and closing of the second air duct 119 and the first air duct 118.

[0069] When the conveying plate 111 is horizontal, the baffle 116 blocks the communication between the second air duct 119 and the first guide groove 115, which can avoid the gas leakage of the second air duct 119.

[0070] When the conveying plate 111 one end up, the corresponding hole 114 on the second connecting shaft 113 corresponds to the second air duct 119, and the baffle 116 is away from the communication between the second air duct 119 and the first guide groove 115, the gas in the second air duct 119 enters the first air duct 118, and is discharged from the air outlet hole 117, which can realize the cleaning and cooling effect of the parts on the conveying plate 111.

[0071] In one embodiment, the lifting mechanism comprises a connecting plate 21 provided with a second guide groove 22 and a third guide groove 23, the second guide groove 22 is linear, and the third guide groove 23 is arc-shaped, the connecting plate 21 is located on both sides of the receiving plate 2, one end of the receiving plate 2 is slidingly connected in the second guide groove 22, and the end of the receiving plate 2 close to the turntable 1 is slidingly connected in the third guide groove 23.

[0072] When the part detection on the receiving plate 2 is completed, the receiving plate 2 is driven to slide away from the one end of the turntable 1, and the one end of the receiving plate 2 close to the turntable 1 is guided by the third guide groove 23, and the one end of the receiving plate 2 away from the turntable 1 slides under the guidance of the second guide groove 22, so that the one end of the receiving plate 2 is raised, thereby facilitating the part on the receiving plate 2 to be arranged.

[0073] In one embodiment, a rodless cylinder 24 is mounted on the base 12, a connecting rod 25 is fixedly connected to the sliding seat of the rodless cylinder 24, a guide groove plate 26 is mounted on the bottom surface of the receiving plate 2, and one end of the connecting rod 25 is slidingly connected in the guide groove plate 26;

[0074] By arranging the rodless cylinder 24, the sliding and resetting of the receiving plate 2 can be facilitated. When the one end of the receiving plate 2 needs to be raised, the sliding seat of the rodless cylinder 24 slides and drives the connecting rod 25 to push the guide groove plate 26, so that the receiving plate 2 slides. When the one end of the receiving plate 2 is raised by the guidance of the third guide groove 23, the one end of the connecting rod 25 rotates in the guide groove plate 26;

[0075] When the parts on the receiving plate 2 slide off, the sliding seat of the rodless cylinder 24 reversely slides, and the guide groove plate 26 is pulled by the connecting rod 25, so that the receiving plate 2 is reset to a horizontal position.

[0076] Further comprising: a second conveying belt 3 located on one side of the receiving plate 2, used to batch convey the detected parts away from the receiving plate 2;

[0077] By arranging the second conveying belt 3 on one side of the receiving plate 2, the detected parts can be conveniently conveyed to another process without manual intervention.

[0078] In one embodiment, by changing the positions of the first conveying belt 14 and the second conveying belt 3, when the first conveying belt 14 and the second conveying belt 3 are 90 degrees, the turntable 1 can also be used to realize the change of the conveying direction of the parts, thereby facilitating the change of the conveying direction of the parts.

[0079] The base 12 is fixedly connected with a motor 13, and the output end of the motor 13 is fixedly connected with the bottom surface of the turntable 1. The first motor 13 can be used to conveniently control the rotation of the turntable 1.

[0080] Referring to Figure 1 A use method of a non-destructive testing device based on DR imaging mainly includes the following steps:

[0081] S1, the parts are continuously conveyed to the turntable 1 by the first conveying belt 14, and the parts are transferred to the side close to the receiving plate 2 by the turntable 1;

[0082] S2, when the parts on the turntable 1 move to one side of the receiving plate 2, one end of the conveying plate 111 is lifted up, so that the parts on the conveying plate 111 slide onto the receiving plate 2, and then the X-ray is emitted to the receiving plate 2 through the emission source 28, and the parts on the receiving plate 2 are detected;

[0083] S3, when the parts on the receiving plate 2 are detected, one end of the receiving plate 2 is lifted up, so that the parts are separated from the receiving plate 2, and then the batch detection of the parts is realized.

[0084] The parts on the first conveying belt 14 are continuously fed onto the conveying plate 111 on the turntable 1, and the parts on the conveying plate 111 are conveyed to the receiving plate 2 for detection through the continuous rotation of the turntable 1, without manual detection, thereby improving the detection effect and realizing batch detection of the parts. Meanwhile, the device can convey the parts at high positions to low positions layer by layer by setting the turntable 1. In the production process, the equipment for producing the parts is often located at a high position. Through the transfer of the turntable 1, the parts at the high position can be conveyed to the low position, which can facilitate the conveying of the parts at the high position and facilitate the observation of the detection process.

[0085] The hardware structure is described above, and then the data processing process is described.

[0086] In another embodiment of the present application, a data processing module is preferably also included, which is installed on the base and used for collecting data of the receiving plate and processing to obtain a detection result, which is sent through the display screen.

[0087] In operation, the emission source controls the sequence, encodes the X-ray image using a mask with a deterministic structure, and obtains the encoded X-ray image. This step is equivalent to subsampling the X-ray image, reducing the data volume.

[0088] Then, the encoded X-ray image is collected by the receiving plate to obtain a digitized X-ray image signal. This step is equivalent to quantizing the X-ray image, realizing the digitization of the data.

[0089] The working process of the data processing module is as follows: the data processing module receives the data of the collecting plate and uses an image reconstruction module based on a sparse reconstruction algorithm or wavelet transform to reconstruct the digitized X-ray image signal, and obtains a high-quality DR image. This step decodes the X-ray image, restoring the integrity of the data.

[0090] The data processing process of the image reconstruction module using the wavelet transform algorithm can also be:

[0091] Convert the input image from RGB to grayscale.

[0092] Apply wavelet transform to each image and obtain four subbands.

[0093] Apply different fusion rules to different subbands. For example, average rule can be used for LL subband, maximum rule for LH and HL subbands, and minimum rule for HH subband.

[0094] Apply inverse wavelet transform to fused subbands and obtain the final fused image.

[0095] In this embodiment, the idea of decomposing input images into different frequency bands and extracting features from them. The image is decomposed into four subbands: low-low (LL), low-high (LH), high-low (HL), and high-high (HH). The LL subband contains the coarse information of the image, while the other three subbands contain edge and texture information. By applying different fusion rules, such as average, maximum, or minimum, to different subbands, a fused image that fuses information from different modalities can be obtained.

[0096] In further embodiments, the recognition efficiency in complex scenes can also be solved by combining X-rays and infrared rays, or by adjusting the working parameters of X-rays, replacing the X-ray source, etc. An infrared emitter and receiver are respectively arranged at the emission source and the receiving plate, i.e., the infrared components are arranged in parallel.

[0097] If the X-ray source is replaced or the working parameters are adjusted, the data processing process is as follows:

[0098] Align the image data under each X-ray source or working parameter mode and perform alignment processing to eliminate geometric transformations such as translation, rotation, scaling, etc. between images, so that the images have the same coordinate system and size. Alignment algorithms include feature point matching, phase correlation, mutual information, etc.

[0099] Use the registration algorithm to register the image data and eliminate non-rigid deformation or deformation between images, so that the images have the same shape and structure. Registration algorithms include rigid registration, affine registration, elastic registration, etc.

[0100] Use the normalization algorithm to normalize the image and eliminate the gray or color difference between images, so that the images have the same dynamic range and statistical distribution. Normalization algorithms include Z-score transformation, maximum and minimum value transformation, etc.

[0101] Main fusion of multi-modal DR images:

[0102] Image fusion is performed by wavelet transform method, and preliminary fusion or further fusion is performed according to different levels or stages.

[0103] The multi-modal DR images are fused using image fusion methods to obtain fused DR images. The fused DR images should contain the information differences and similarities between different modalities and preserve the quality and resolution of the original images.

[0104] The above two steps are repeated using different image fusion methods or parameters to obtain fused DR images at different levels or stages. For example, preliminary fusion can be performed at the pixel or feature level, and further fusion can be performed at the decision or semantic level.

[0105] Post-fusion is performed on the fused DR images:

[0106] Gradient descent algorithm is used to optimize the fused DR images to eliminate distortion, noise, artifacts and other problems that may occur during the fusion process, and improve image quality and reliability.

[0107] The fused DR images are evaluated to assess the pros and cons of the fusion effect, such as information gain, contrast enhancement, edge preservation, and entropy increase. Evaluation indicators include peak signal-to-noise ratio, structural similarity, and information fidelity.

[0108] Feedback processing is performed on the fused DR images based on the evaluation results to adjust the image fusion method or parameters to improve the fusion effect. Feedback mechanisms include iterative updates, adaptive adjustments, and learning updates.

[0109] In this embodiment, different wavelengths or energy X-ray sources produce different penetration or absorption effects; different resolution or sensitivity detectors produce different details or contrasts, thereby improving recognition accuracy. Solving the problem that a single DR detection technology may not provide enough information to determine the defects or abnormalities inside or on the surface of the detected object.

[0110] In further embodiments, due to changes in the shape, material, position, and other factors of the detected object, as well as environmental light, temperature, humidity, and other factors, image distortion, noise interference, and artifact generation may occur, affecting the accuracy and reliability of the detection results.

[0111] To this end, an image enhancement module is provided in the data processing module,

[0112] The image enhancement module uses Gaussian filtering, median filtering, or wavelet transform to denoise the image data, then uses an adaptive algorithm to adjust the brightness and contrast of the image. Finally, an edge detection algorithm is used to adaptively segment the image into a region of interest (ROI) and a background region (BG), only retaining the ROI part and removing the BG part. The enhanced image module is output for further processing.

[0113] In another embodiment of the present application, if the detected object or the detector may move or change, the image quality will be poor if the projection parameters, acquisition parameters, reconstruction parameters, etc. are not adjusted in real time.

[0114] To this end, a fast reconstruction module is provided in the data processing module.

[0115] A deep learning method based on convolutional neural network is used to construct the fast reconstruction module to recover high-quality image data from a small amount or incomplete data. The quality and resolution of the reconstruction result are monitored during the reconstruction process, including peak signal-to-noise ratio, structural similarity, and information fidelity. If the requirements are not met, the reconstruction method or parameters are adjusted and the reconstruction is performed again.

[0116] A classification model is used to pre-classify the fast reconstructed image data and output the detection result. The detection result should include the location and category of the defect, as well as the corresponding confidence or probability. The detection result is marked with different colors or shapes of boxes or labels.

[0117] During the image reconstruction process, it is possible to use sparse matrix or compressed sensing methods. Existing reconstruction methods also have problems such as how to select a suitable transform domain in the sparse matrix representation process, how to construct a suitable measurement matrix, and non-convex optimization problems in the reconstruction process.

[0118] To this end, the following solutions are provided:

[0119] Extract the characteristics of the image data and construct the mapping relationship between the characteristics of the image data and the transform domain;

[0120] In use, based on the characteristics and structure of the signal, a suitable transform domain is selected and the best transform basis is determined. According to experimental research, the most common is wavelet transform, followed by discrete cosine transform, and finally dictionary learning.

[0121] By performing multi-scale decomposition on the original image data, wavelet coefficients at different levels and directions are obtained, i.e. the original image data is transformed into the selected transform domain to obtain the transform coefficients.

[0122] Check whether the transform coefficients have sparsity or compressibility, i.e. whether only a few non-zero or large coefficients exist. If so, these coefficients are retained and other coefficients are discarded; if not, the transform domain or parameters are adjusted.

[0123] The sparsely represented signal is compressed and measured, including the following steps:

[0124] According to the measurement requirements and conditions, the measurement matrix is selected, and the measurement mode and parameters are determined; the measurement matrix is multiplied by the sparse coefficient to obtain the measurement value; it is checked whether the measurement value meets some mathematical conditions, such as constraint equidistance, irrelevance, etc. If yes, the measurement value is saved and transmitted or stored; if not, the measurement matrix or parameters are adjusted.

[0125] According to the optimization target and constraint, the reconstruction algorithm is selected, and the optimization method and parameters are determined.

[0126] The measurement value is reconstructed and recovered using the reconstruction algorithm to obtain the reconstruction coefficient.

[0127] It is checked whether the reconstruction coefficient is consistent or close to the original sparse coefficient, i.e. whether the original signal can be recovered. If yes, the reconstruction coefficient is saved and converted back to the original signal; if not, the reconstruction algorithm or parameters are adjusted.

[0128] In further embodiments, the measurement matrix can adopt a Fourier matrix, a random matrix or a Hadamard matrix. The measurement value can be a partial Fourier coefficient (partial Fourier matrix multiplied by cosine coefficient), a random projection value (random matrix multiplied by sparse coefficient) and a partial Hadamard coefficient (partial Hadamard matrix multiplied by wavelet coefficient).

[0129] In another embodiment of the present application, the optimization method includes Basis Pursuit, Proximal Gradient Method, Matching Pursuit and Iterative Hard Thresholding.

[0130] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above-mentioned technical content without departing from the scope of the technical solution of the present application, and any simple modification, equivalent change and modification of the above-mentioned embodiments according to the technical essence of the present application are still within the scope of the present application.

Claims

1. A non-destructive testing device based on X-ray DR imaging, comprising a base (12), characterized in that, Also includes: The first conveyor belt (14) is used to transport the parts to be inspected; A turntable (1) is rotatably mounted on the base (12). The turntable (1) has multiple mounting slots (11) around its circumference. A conveyor plate (111) for carrying parts is provided in the mounting slot (11). The receiving plate (2) and the transmitting source (28) are respectively set on one side of the turntable (1) to detect when the parts on the conveying plate (111) fall onto the receiving plate (2); An upward mechanism is used to push the part away from the receiving plate (2) after the test is completed. One end of the first conveyor belt (14) is close to the turntable (1). When the conveyor plate (111) is in a horizontal state, when the parts on the first conveyor belt (14) are conveyed to the conveyor plate (111) on the turntable (1), the turntable (1) is controlled to rotate, and the parts on the conveyor plate (111) are transferred to the side close to the receiving plate (2). At this time, one end of the conveyor plate (111) is raised, so that the parts on the conveyor plate (111) slide down to the receiving plate (2). Then, X-rays are emitted through the emission source (28) to perform DR imaging detection on the parts on the receiving plate (2). The two ends of the conveyor plate (111) are respectively fixedly connected to a first connecting shaft (112) and a second connecting shaft (113). The first connecting shaft (112) is rotatably connected to the side wall of the mounting groove (11). A first guide groove (115) is provided on the side wall of the mounting groove (11). The second connecting shaft (113) is slidably connected in the first guide groove (115). It also includes: a connecting rod (15), one end of which is rotatably connected to the bottom surface of the conveyor plate (111), a bracket (152) is fixedly connected to the bottom surface of the turntable (1), the connecting rod (15) is slidably connected in the groove of the bracket (152), a tension spring (151) is sleeved on the connecting rod (15), one end of the tension spring (151) is fixedly connected to the bracket (152), and the other end of the tension spring (151) is fixedly connected to the bottom surface of the connecting rod (15) near the conveyor plate (111); An arc-shaped boss (16) is fixedly connected to the side of the base (12) near the receiving plate (2), and the end of the connecting rod (15) corresponds to the arc-shaped boss (16); The conveyor plate (111) is provided with an air outlet (117); The turntable (1) has a second air passage (119) and the conveying plate (111) has a first air passage (118). The second air passage (119) corresponds to the corresponding hole (114) on the first air passage (118). A baffle (116) is fixedly connected to the second connecting shaft (113). The baffle (116) is located in the first guide groove (115) and is used to control the opening and closing between the second air passage (119) and the first air passage (118). When the conveyor plate (111) is in a horizontal state, the baffle (116) blocks the connection between the second air passage (119) and the first guide groove (115). When one end of the conveyor plate (111) is raised, the corresponding hole (114) on the second connecting shaft (113) corresponds to the second air passage (119). At the same time, the baffle (116) moves away from the connection between the second air passage (119) and the first guide groove (115). The gas in the second air passage (119) enters the first air passage (118) and is discharged from the air outlet (117).

2. The non-destructive testing device based on X-ray DR imaging according to claim 1, characterized in that, The lifting mechanism includes a connecting plate (21) with a second guide groove (22) and a third guide groove (23). The second guide groove (22) is straight, and the third guide groove (23) is arc-shaped. The connecting plate (21) is located on both sides of the receiving plate (2). One end of the receiving plate (2) is slidably connected in the second guide groove (22), and the end of the receiving plate (2) near the turntable (1) is slidably connected in the third guide groove (23).

3. The non-destructive testing device based on X-ray DR imaging according to claim 2, characterized in that, A rodless cylinder (24) is installed on the base (12). A connecting rod (25) is fixedly connected to the slide of the rodless cylinder (24). A guide plate (26) is installed on the bottom surface of the receiving plate (2). One end of the connecting rod (25) is slidably connected in the guide plate (26).

4. The non-destructive testing device based on X-ray DR imaging according to claim 3, characterized in that, Also includes: The second conveyor belt (3) is located on one side of the receiving plate (2) and is used to transport the parts after the inspection is completed away from the receiving plate (2) in batches. A motor (13) is fixedly connected to the base (1), and the output end of the motor (13) is fixedly connected to the bottom surface of the turntable (1).

5. The non-destructive testing device based on X-ray DR imaging according to claim 1, characterized in that, It also includes a data processing module, which is installed on the base and is used to collect and process the data from the receiving board to obtain the detection results, which are then displayed on the screen.

6. A method for performing non-destructive testing using the non-destructive testing apparatus based on X-ray DR imaging as described in any one of claims 1-5, characterized in that, Includes the following steps: S1. The parts are continuously conveyed to the turntable (1) via the first conveyor belt (14), and the turntable (1) transfers the parts to the side close to the receiving plate (2). S2. When the parts on the turntable (1) move to one side of the receiving plate (2), one end of the conveyor plate (111) rises, causing the parts on the conveyor plate (111) to slide onto the receiving plate (2), and then X-rays are emitted onto the receiving plate (2) through the emission source (28) to detect the parts on the receiving plate (2). S3. After the parts on the receiving plate (2) have been inspected, one end of the receiving plate (2) is lifted up, causing the parts to be removed from the receiving plate (2), thereby realizing the batch inspection of the parts.

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