Jewel shaft socket surface defect detection method and device

Abstract

The invention discloses a jewel shaft socket surface defect detection method and device. The jewel shaft socket surface defect detection method comprises the following steps: S1, rotating a conveying turntable, and conveying a to-be-detected part which is processed in the previous procedure to a detection station of an image acquisition module; s2, starting a positioning adjustment module, jacking the to-be-detected part to a preset detection point position, and enabling the top of the opening part of the to-be-detected part to be in close contact with the rotating sleeve; s3, controlling the microscope to focus on the surface of the jewel bearing ball socket, and collecting a first surface image; s4, starting the rotating sleeve, driving the damper and the to-be-tested part to rotate by a preset angle, and then stopping; s5, the microscope is focused on the surface of the jewel bearing ball socket again, and a second surface image is collected; and S6, transmitting the two images with different visual angles to a defect detection and analysis module, and analyzing the data and outputting a detection result by the defect detection and analysis module. According to the invention, automatic detection of the surface defects of the shaft socket of the jewel bearing in the small hole is realized, the production efficiency is improved, and the labor intensity of personnel is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gem bearing defect detection, and in particular to a gem bearing socket surface defect detection method and device. BACKGROUND

[0002] In the detection process of gem bearing socket surface defects, an operator usually needs to detect and judge whether a transparent gem bearing socket surface in a small hole exists defects through a 40 times body microscope, the defect types including grinding marks, fragmentation, oil stains and foreign matter, etc. For the defects, relevant personnel usually need to detect and subsequently process. Since the part is only used for national special equipment, there is no related device for detecting the gem bearing socket surface defects in the small hole on the market. The current manual detection method has problems of low efficiency and easy fatigue of personnel, and thus it is difficult to meet the social needs. SUMMARY

[0003] The present application aims at the above-mentioned problems and provides a gem bearing socket surface defect detection method and device, which can efficiently and accurately detect gem bearings.

[0004] To solve the above technical problems, the present application adopts the following technical scheme: a gem bearing socket surface defect detection method, comprising the following steps: S1, rotating a conveying turntable and transmitting the processed to-be-detected part to the detection station of the image acquisition module; S2, starting the positioning adjustment module to lift the to-be-detected part to a preset detection point, so that the top of the to-be-detected part is in close contact with the rotating sleeve, and the to-be-detected part in the placement hole is ensured to be within the depth of field of the microscope; S3, controlling the microscope to focus on the gem bearing socket surface to acquire a first surface image; S4, starting the rotating sleeve to drive the damper and the to-be-detected part to rotate by a preset angle and then stop; S5, controlling the microscope to focus on the gem bearing socket surface again to acquire a second surface image; S6, transmitting the two images with different perspectives to the defect detection analysis module, the defect detection analysis module analyzes the data and outputs the detection result, so as to complete the detection.

[0005] Further, the preset rotation angle in the step S4 is 180°.

[0006] Further, a displacement sensor is further included, which is used to detect the lifting height of the positioning adjustment module.

[0007] Further, the conveying turntable in the step S1 is intermittently rotated.

[0008] Further, the specific analysis mode of the defect detection analysis module in the step S6 is that the defect detection analysis module performs feature extraction and defect recognition on the two collected images of different perspectives, judges whether the gem shaft hole surface has defects and the defect type, and the defect type includes grinding marks, fragmentation, oil stains and foreign matters.

[0009] A gem shaft hole surface defect detection device, comprising a linear module, an assembly table, an image acquisition module, a positioning adjustment module, a rotating disc assembly and a defect detection analysis module. The assembly table is arranged at the moving end of the linear module, the image acquisition module is arranged on the assembly table, and the image acquisition module and the positioning adjustment module are respectively located at the top and the bottom of the rotating disc assembly. The rotating disc assembly comprises a conveying rotating disc with multiple groups of workstations, the bottom of the conveying rotating disc is provided with a driving part for driving the conveying rotating disc to rotate, each group of workstations on the conveying rotating disc comprises two independent workstations, and a damper is rotatably arranged at the corresponding workstation. The image acquisition module is used for acquiring the surface image of the gem shaft hole in the small hole. The moving end of the positioning adjustment module can be lifted, and when the moving end is in contact with the corresponding damper, the damper is lifted. The defect detection analysis module is signal connected with the image acquisition module, and is used for performing defect analysis on the collected image and outputting a detection result.

[0010] Further, the image acquisition module comprises a microscope vertically arranged on the assembly table, the assembly table is further provided with a light source, the assembly table is provided with a mounting bracket, the mounting bracket is rotatably provided with a rotating sleeve, and the assembly table is further provided with a power source for driving the rotating sleeve to rotate.

[0011] Further, the positioning adjustment module comprises a jacking part, the moving end of the jacking part is rotatably provided with a placing table, the jacking part can jacking the damper until the top of the damper is in contact with the rotating sleeve, and the rotating sleeve can drive the damper to rotate.

[0012] Further, the damper comprises a table body, and a placing hole for placing the gem shaft hole to be tested is formed at the axis of the table body.

[0013] The beneficial effects of the present application are as follows: In this invention, in the initial state, the moving end of the positioning adjustment module is positioned lower to facilitate the transport turntable to transport the jewel bearing socket in the damper, which has been processed in the previous step, to the top of the positioning adjustment module. Subsequently, the lifting mechanism operates and lifts the damper to its top, where it is in close contact with the rotating sleeve. In this state, the component to be tested (jewel bearing socket) is within the depth of field of the microscope, and the rotating sleeve can drive the component to be tested to rotate when it operates. Therefore, the jewel bearing socket can be inspected from multiple angles, thus avoiding the failure to detect some minor defects. This equipment realizes automated detection of surface defects in the jewel bearing socket inside the small hole, improves production efficiency, reduces the labor intensity of personnel, and is therefore convenient for practical use. Attached Figure Description

[0014] Figure 1 This is a schematic view of the device of the present invention; Figure 2 This is a schematic diagram showing the setup of the image acquisition module and the positioning adjustment module in this invention; Figure 3 This is a side view of the image acquisition module and the positioning adjustment module in this invention; Figure 4 This is a schematic diagram of the damper structure in this invention; Figure 5 This is a schematic diagram of the conveyor turntable structure in this invention; Figure 6 This is a schematic diagram showing the location of the jewel bearing recess confirmed by YOLO in this invention; Figure 7 This is a schematic diagram of the Patchcore detection results in this invention; Figure 8 This is a schematic diagram of the YOLO detection results in this invention.

[0015] In the picture: 1. Linear module; 2. Assembly table; 3. Image acquisition module; 301. Microscope; 302. Light source; 303. Mounting bracket; 304. Rotating sleeve; 4. Positioning and adjustment module; 401. Lifting component; 402. Placement table; 5. Transport turntable; 6. Damper; 601. Stage body; 602. Placement hole. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Referring to Figures 1-8 The application discloses a gem bearing socket surface defect detection method, comprising the following steps: S1, rotating the conveying turntable 5 and transmitting the processed to-be-detected parts to the detection station of the image acquisition module 3; S2, starting the positioning adjustment module 4, lifting the to-be-detected parts to the preset detection point, and ensuring that the top of the damper 6 is in close contact with the rotating sleeve 304, so that the to-be-detected parts in the placement hole 602 are in the depth of field range of the microscope 301; S3, controlling the microscope 301 to focus on the gem bearing socket surface and collecting the first surface image; S4, starting the rotating sleeve 304, driving the damper 6 and the to-be-detected parts to rotate by a preset angle and then stopping; S5, controlling the microscope 301 to focus on the gem bearing socket surface again and collecting the second surface image; S6, transmitting the two images with different perspectives to the defect detection analysis module, analyzing the data by the defect detection analysis module and outputting the detection result, so as to complete the detection.

[0018] In the initial state, the moving end of the positioning adjustment module 4 is lowered, so that the conveying turntable 5 can convey the gem socket in the damper 6 processed in the previous process to the top of the positioning adjustment module 4, then the lifting mechanism works and lifts the damper 6 to the state that the top is in close contact with the rotating sleeve 304, in this state, the to-be-detected parts (the gem socket) are located in the depth of field range of the microscope 301, and at this time, the rotating sleeve 304 can drive the to-be-detected parts to rotate, so that the gem bearing socket can be detected from multiple angles, thereby avoiding that part of the micro defects cannot be detected, the device realizes the automatic detection of the gem bearing socket surface defects in the small hole, improves the production efficiency, reduces the labor intensity of the personnel, and is convenient for actual use.

[0019] In an embodiment, the preset rotation angle in step S4 is 180°.

[0020] In this way, the to-be-detected parts are driven to rotate by 180° by the rotating mechanism, and stop after rotating to the position, so that the switching of the gem bearing socket perspective can be realized.

[0021] In an embodiment, a displacement sensor is further included, which is used to detect the lifting height of the positioning adjustment module 4.

[0022] In this way, when the positioning adjustment module 4 lifts the damper 6 and the to-be-detected parts, the lifting height is detected in real time by the displacement sensor, when it is detected that the top of the damper 6 is in contact with the rotating sleeve 304 and the pressure reaches the preset threshold, the lifting mechanism stops working, and the accurate positioning of the parts is realized.

[0023] In an embodiment, the conveying turntable 5 in step S1 rotates intermittently.

[0024] In this way, when the detection of the parts in one station is completed, the conveying turntable 5 rotates by a preset angle to transfer the next part to be detected to the detection position, and at the same time, the detected part is transferred to the unloading station, so that the continuous supply of the workpieces to be detected and the timely unloading of the detected workpieces are realized.

[0025] In an embodiment, the specific method of defect analysis in step S6 is that the defect detection and analysis module extracts features and identifies defects from the two images collected from different angles, judges whether there is a defect on the surface of the gem shaft socket and the type of the defect, and the defect type includes grinding marks, fragmentation, oil stains and foreign matters.

[0026] The detection device also includes a gem shaft socket surface defect detection device, which is applied to the gem shaft socket detection method in a small hole. The detection device includes a linear module 1, an assembly table 2, an image acquisition module 3, a positioning adjustment module 4, a turntable assembly, and a defect detection and analysis module. The assembly table 2 is installed on the moving end of the linear module 1, and the linear module 1 can drive the assembly table 2 to move up and down. The image acquisition module 3 is installed on the assembly table 2, and the image acquisition module 3 and the positioning adjustment module 4 are respectively located at the top and bottom of the turntable assembly. The turntable assembly includes a conveying turntable 5 with multiple stations. The bottom of the conveying turntable 5 has a driving part that drives the conveying turntable 5 to rotate. The driving part can be a motor device. Each set of stations on the conveying turntable 5 includes two independent stations, and a damper 6 is rotatably placed at the corresponding station.

[0027] In specific implementation, the image acquisition module 3 is used to acquire the surface image of the gem shaft socket in a small hole. The moving end of the positioning adjustment module 4 can be lifted, and when it is in contact with the corresponding damper 6, it can drive the damper 6 to lift. The defect detection and analysis module is signal connected with the image acquisition module, and is used to analyze the defects of the acquired image and output the detection result.

[0028] In an embodiment, the image acquisition module 3 includes a microscope 301 vertically installed on the assembly table 2. A light source 302 is also installed on the assembly table 2. An installation bracket 303 is installed on the assembly table 2. A rotating sleeve 304 is rotatably installed on the installation bracket 303. A power source is installed on the assembly table 2 to drive the rotating sleeve 304 to rotate.

[0029] In specific implementation, the power source can be a motor device and a transmission part. The transmission part can be a gear and ring gear set. In use, the gear is installed on the rotating shaft of the power source, and the ring gear is coaxially installed on the rotating sleeve 304. The gear is engaged with the ring gear. When the motor device is started, it can drive the rotating sleeve 304 to rotate by cooperating with the transmission part.

[0030] In an embodiment, the positioning adjustment module 4 comprises a jacking component 401, and a placement table 402 is rotatably mounted at the movement end of the jacking component 401.

[0031] In a specific implementation, the telescopic shaft of the jacking component 401 can drive the placement table 402 to synchronously ascend, and when the placement table 402 contacts the damper 6, the placement table 402 can continue to jack up the damper 6 until the top of the damper 6 contacts the rotating sleeve 304. In this state, the rotating sleeve 304 can drive the damper 6 to rotate, and the placement table 402 synchronously rotates with the damper 6.

[0032] In an embodiment, the damper 6 comprises a table body 601, and a placement hole 602 for placing the shaft hole of the gem to be measured is formed at the shaft center of the table body 601.

[0033] In addition, the defect detection and analysis module further comprises a defect detection model algorithm and an analysis process.

[0034] As shown below, specifically, a defect detection algorithm based on deep learning is used, which uses a triple detection scheme of “YOLO+Patchcore+YOLO” for detection.

[0035] Specifically, the gem bearing surface quality defect detection algorithm constructs a data set based on multiple sample images (including qualified images and defect images). Based on the data set, first, the Labelimg is used to label the YOLO format gem bearing boundary box for defining the defect analysis area. A Patchcore training set is established through normal samples, and a pre-trained CNN model is used to obtain local feature blocks and store them in the memory. Then, the YOLO format defect type is labeled again to establish a YOLO training set. The optimization target is mAP@0.5≥98.5%.

[0036] After the image input algorithm system, the YOLO model analyzes the sample image and confirms the gem bearing shaft hole part in the image, performs target detection, and then performs Patchcore detection and YOLO detection on the obtained gem picture, respectively, to obtain the score of the detected abnormal area.

[0037] Finally, through a joint scoring mechanism, the final detection score is obtained, Core>B is unqualified, and Core<=B is qualified (A and B are adjustable parameters, and currently A is 0.7 and B is 0.97), and the calculation formula is as follows: Core=A*YOLO+(1-A)*Patchcore.

[0038] It should be noted that if the embodiments of the present application involve directionality indication (such as up, down, left, right, front, back, etc.), the directionality indication is only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indication also changes accordingly.

[0039] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person skilled in the art, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the protection scope of the present application.

[0040] In addition, "multiple" means more than two.

[0041] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for detecting surface defects in gemstone shaft recesses, characterized in that, Includes the following steps: S1. The test parts that have been processed in the previous step are transferred to the detection station of the image acquisition module (3) by rotating the transport turntable (5); S2. Start the positioning adjustment module (4) to lift the part to be tested to the preset detection point so that the top of the damper (6) is in close contact with the rotating sleeve (304) and ensure that the part to be tested in the placement hole (602) is within the depth of field of the microscope (301). S3. Control the microscope (301) to focus on the surface of the jewel bearing socket and acquire the first surface image; S4. Start the rotating sleeve (304) to drive the damper (6) and the part to be tested to rotate by a preset angle and then stop. S5. The microscope (301) is refocused on the surface of the jewel bearing socket to acquire a second surface image; S6. Transmit two images from different perspectives to the defect detection and analysis module. The defect detection and analysis module analyzes the data and outputs the detection results, thereby completing the detection.

2. The method for detecting surface defects in a gemstone shaft socket according to claim 1, characterized in that: In step S4, the preset rotation angle is 180°.

3. The method for detecting surface defects in a gemstone shaft socket according to claim 1, characterized in that: It also includes a displacement sensor, which is used to detect the lifting height of the positioning adjustment module (4).

4. The method for detecting surface defects in a gemstone shaft socket according to claim 1, characterized in that: The transport turntable (5) in step S1 rotates intermittently.

5. The method for detecting surface defects in a gemstone shaft socket according to claim 1, characterized in that: The specific analysis method of the defect detection and analysis module in step S6 is as follows: the defect detection and analysis module performs feature extraction and defect identification on the two images collected from different perspectives to determine whether there are defects on the surface of the gemstone shaft socket and the type of defects. The defect types include scratches, cracks, oil stains and foreign objects.

6. A device for detecting surface defects in a gemstone shaft recess, applied to the method for detecting surface defects in a gemstone shaft recess according to any one of claims 1-5, characterized in that: It includes a linear module (1), an assembly table (2), an image acquisition module (3), a positioning and adjustment module (4), a turntable assembly, and a defect detection and analysis module; The assembly platform (2) is set at the moving end of the linear module (1), the image acquisition module (3) is set on the assembly platform (2), and the image acquisition module (3) and the positioning adjustment module (4) are located at the top and bottom of the turntable assembly, respectively. The turntable assembly includes a transport turntable (5) with multiple workstations. The bottom of the transport turntable (5) has a drive unit that drives the transport turntable (5) to rotate. Each workstation on the transport turntable (5) includes two independent workstations, and a damper (6) is rotatably placed at the corresponding workstation. The image acquisition module (3) is used to acquire surface images of the gemstone shaft recess inside the small hole; The moving end of the positioning adjustment module (4) can rise and fall, and when the moving end contacts the corresponding damper (6), it can drive the damper (6) to rise and fall. The defect detection and analysis module is signal-connected to the image acquisition module and is used to perform defect analysis on the acquired image and output the detection results.

7. The gemstone shaft recess surface defect detection device according to claim 6, characterized in that: The image acquisition module (3) includes a microscope (301) vertically mounted on the assembly table (2), a light source (302) is also mounted on the assembly table (2), a mounting bracket (303) is mounted on the assembly table (2), a rotating sleeve (304) is rotatably mounted on the mounting bracket (303), and a power source is also mounted on the assembly table (2) to drive the rotating sleeve (304) to rotate.

8. The gemstone shaft recess surface defect detection device according to claim 7, characterized in that: The positioning adjustment module (4) includes a lifting component (401), and a placement platform (402) is rotatably provided at the moving end of the lifting component (401). The lifting component (401) can lift the damper (6) until its top contacts the rotating sleeve (304), and the rotating sleeve (304) can drive the damper (6) to rotate.

9. The gemstone shaft recess surface defect detection device according to claim 6, characterized in that: The damper (6) includes a platform (601), and a placement hole (602) for placing the gemstone shaft socket to be tested is provided at the center of the platform (601).

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