Spring appearance detection device based on visual analysis

Abstract

The present application relates to spring detection technical field, specifically, it relates to spring appearance detection device based on visual analysis, including detection platform, feeding device, image acquisition device, sorting device and rotating disc for rotating conveying raw materials, rotating disc is connected with driving part, and a plurality of material containing grooves for accommodating raw materials are arranged in array on rotating disc, distance adjusting mechanism is arranged outside rotating disc, distance adjusting mechanism includes adjusting part located at the bottom of rotating disc and distance adjusting part located in material containing groove, adjusting part can control distance adjusting part according to the size of raw materials to be measured, adjusting part is powered by manual work, so that distance adjusting part transversely displaces. By adjusting the height of the supporting horizontal plate, the two sides of the distance adjusting plate are retracted or expanded, the raw materials to be measured are limited, and the accommodating area is matched with the size and model of the raw materials to be measured, so that different sizes of raw materials to be measured are detected, the detection efficiency and practicability are improved.

Description

Technical Field

[0001] This invention relates to the field of spring inspection technology, and more specifically, to a spring appearance inspection device based on visual analysis. Background Technology

[0002] After the springs are wound, their appearance quality needs to be inspected. The appearance of the spring is a crucial quality requirement; scratches, abrasions, cracks, and rust on the spring surface will affect its lifespan. Deformation and burrs will affect the installation and use of the spring.

[0003] Of course, in other industries, there are already specialized visual inspection systems for product appearance inspection, such as using CCD industrial cameras to detect product appearance defects, which have a higher recognition rate than the human eye. However, as is well known, a complete appearance inspection system involves not only visual inspection equipment but also other related auxiliary equipment such as product clamping and positioning, sorting and classification. Due to the different structural characteristics of the products themselves and the different appearance inspection requirements, these auxiliary equipment will not be exactly the same.

[0004] Currently, when inspecting the outer tube of a spring, a rotary table is usually used, with several grooves made on the rotary table to accommodate the spring. The spring is then rotated within the grooves to the image acquisition area for sampling. The system processes and analyzes the acquired images to identify any defects in the spring's appearance.

[0005] Because the groove size on the rotary table needs to be compatible with the spring to be tested, it is necessary to stop the machine to change the rotary table (matching the spring) for each type of spring produced, or to purchase multiple sets of rotary tables for production. However, this will occupy a lot of capital and storage space, and frequent machine stoppages for changing the model will prolong the production interruption time and affect the testing efficiency. Summary of the Invention

[0006] This invention provides a visual analysis-based spring appearance inspection device. By adjusting the height of the supporting horizontal plate, the adjusting plates on both sides are caused to retract inward or expand outward, thus restricting the material to be tested. Simultaneously, the accommodating area matches the size and model of the material to be tested, thereby enabling the inspection of materials of different sizes. This solves the problems mentioned in the background art, namely:

[0007] To achieve the above objectives, the vision analysis-based spring appearance inspection device includes an inspection table, a feeding device, an image acquisition device, a sorter, and a rotary disk for rotating and conveying raw materials. The rotary disk is connected to the drive unit, and several material storage slots for accommodating raw materials are arranged in an array on the rotary disk.

[0008] An adjustment mechanism is provided outside the rotating disk. The adjustment mechanism includes an adjustment part located at the bottom of the rotating disk and an adjustment part located in the material receiving trough. The adjustment part can control the adjustment part according to the size of the raw material to be measured. The adjustment part is manually operated as an external power source to make the adjustment part move laterally. The adjustment part adapts to the raw material by changing the size of the material receiving trough and restricts the raw material to achieve stable conveying of the raw material.

[0009] Secondly, the adjustment unit includes an adjustment screw located on the central axis of the rotating disk and a support plate located directly below each material trough. The adjustment screw is threadedly connected to a guide plate, and its top is rotatably connected to the outer extension plate. The distal ends of several of the guide plates are fixedly connected to the support plate.

[0010] The adjusting section includes adjusting plates movably disposed inside the material receiving trough. The adjusting plates are symmetrically arranged, and a load spring is elastically connected between the adjusting plates and the inner wall of the material receiving trough. The load spring provides support for the adjusting plates. The adjusting plates on both sides are responsible for limiting the displacement of raw materials in the material receiving trough and maintaining the stability of the raw materials.

[0011] A receiving area for receiving raw materials is formed between the two adjusting plates, and a buffer zone is formed between the adjusting plates and the inner wall of the receiving trough, wherein the buffer zone contains the load spring.

[0012] An auxiliary plate is fixedly installed at the bottom of the adjusting plate. The auxiliary plate is slidably connected to the guide groove in the material receiving trough. The auxiliary plate is L-shaped and has a vertical end and an extended end. Under normal conditions, there is a gap between the two vertical ends, and the extended end is connected to the vertical end and bends outward.

[0013] The middle part of the support plate is an arc surface. The support plate has a raised end and a sunken end. A downward slope is formed from the raised end to the sunken end. The downward slope is responsible for guiding the auxiliary plate laterally, forcing the accommodating area to expand.

[0014] In the above technical solution, in the promoted state, the arc surface of the supporting horizontal plate is located between the two vertical ends and close to the vertical ends. At this time, the material that the accommodating area between the two adjustable plates can accept is the minimum size.

[0015] Furthermore, when it is necessary to test larger sizes of raw materials, by moving the support plate upward, the force of the support plate on the outer end of the support plate overcomes the elastic potential energy of the load spring, forcing the outer end of the auxiliary plate to slide along the inclined surface of the support plate. The auxiliary plate moves to both sides under the guidance of the support plate. At the same time, the accommodating area between the adjusting plates expands and the buffer zone shrinks, thereby accommodating raw materials of different sizes and improving the practicality of the device.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] By adjusting the height of the support plate, the adjustment plates on both sides are made to retract inward or expand outward, thus restricting the raw material to be tested. At the same time, the accommodating area is matched with the size and model of the raw material to be tested, thereby enabling the testing of raw materials of different sizes, improving testing efficiency and practicality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the rotating disk and sorter structure of the present invention;

[0020] Figure 3 This is a schematic diagram illustrating the image acquisition principle of the image acquisition device of the present invention;

[0021] Figure 4 This is an exploded view of the rotating disk and supporting cross plate of the present invention;

[0022] Figure 5 This is a top view of the rotating disk structure of the present invention;

[0023] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the diagram;

[0024] Figure 7 This is a schematic diagram of the cross-sectional structure of the rotating disk of the present invention;

[0025] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point B in the diagram;

[0026] Figure 9 This is a schematic diagram of the spring sorting principle of the present invention.

[0027] The meanings of the labels in the diagram are as follows:

[0028] 100. Inspection table; 101. Feeding device; 102. Image acquisition device; 103. Sorter; 103a. Collection box; 103b. Telescopic plate; 103c. Partition; 104. Support plate;

[0029] 110. Rotary disk; 111. Feed trough; 111a. Guide groove; 112. Extension plate; 113. Stabilizer bar;

[0030] 120. Adjustment mechanism; 121. Adjustment screw; 122. Support plate; 123. Guide plate; 124. Adjustment plate; 124a. Auxiliary plate; 125. Receiving area; 126. Buffer zone; 127. Load spring. Detailed Implementation

[0031] 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 some embodiments of the present invention, and not all embodiments. 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.

[0032] Because the groove size on the rotary table needs to be compatible with the spring to be inspected (hereinafter referred to as raw material), it is necessary to stop the machine to change the rotary table (matching the raw material) for each type of raw material produced, or to purchase multiple sets of rotary tables for production. However, this would occupy a lot of capital and storage space, and frequent machine stoppages for changing the model would prolong production interruption time and affect inspection efficiency. This invention provides a spring appearance inspection device based on visual analysis, see [link to relevant documentation]. Figures 1-3 As shown, the system includes a testing platform 100, a feeding device 101, an image acquisition device 102, a sorter 103, and a rotary disk 110 for rotating and conveying raw materials. The rotary disk 110 is connected to a drive unit, which includes the sorter 103. Several extension plates 112 are fixedly connected between the output shaft of the sorter 103 and the rotary disk 110. The sorter 103 is fixed on a support plate 104 on the testing platform 100. The support plate 104 provides support for the sorter 103 via the rotary disk 110. The rotary disk 110 has several extension plates 112 arranged in an array for... A material receiving trough 111 is provided to hold the raw materials. Thus, during the raw material inspection stage, the raw materials are first conveyed to the rotary table 110 via the feeding device 101. The electrical control system then ensures that each raw material falls into its corresponding receiving trough 111. Next, the raw materials in each receiving trough 111 are photographed by the image acquisition device 102. The system processes and analyzes the acquired images to identify any defects in the spring's appearance. Based on the inspection results, the image acquisition device 102 classifies the qualified and unqualified products. This is the entire raw material inspection process. The detailed process is shown below:

[0033] The rotating disk 110 is equipped with an adjustment mechanism 120. The adjustment mechanism 120 includes an adjustment part located at the bottom of the rotating disk 110 and an adjustment part located in the material receiving trough 111. The adjustment part can control the adjustment part according to the size of the raw material to be measured. The adjustment part is manually operated as an external power source to make the adjustment part move laterally. The adjustment part adapts to the raw material by changing the size of the material receiving trough 111 and restricts the raw material to achieve stable conveying of the raw material, thereby improving the practicality and detection efficiency of the device.

[0034] based on Figure 3 Based on and combined Figure 4As shown, the specific structure of the adjustment unit is disclosed first. The adjustment unit includes an adjustment screw 121 located on the central axis of the rotating disk 110 and a support plate 122 located directly below each material receiving trough 111. The adjustment screw 121 is threadedly connected to a guide plate 123, and its top is rotatably connected to the extension plate 112 (see reference). Figure 8 As shown), the distal ends of several guide plates 123 are fixedly connected to the supporting cross plate 122; therefore, before testing the raw material to be tested, a pre-operation is required, that is, the knob on the adjusting screw 121 is rotated according to the size of the raw material to be tested. The top of the adjusting screw 121 rotates under the constraint of the extension plate 112. In order to realize the vertical movement of the extension plate 112 (i.e., with...), Figure 3 For example, the support plate 122 moves up and down. On the other hand, the bottom of the extension plate 112 is symmetrically provided with a stabilizing rod 113. The stabilizing rod 113 passes through the guide plate 123 and is used to restrict the rotation of the guide plate 123. The stabilizing rod 113 and the guide plate 123 are slidably arranged. So, when the adjusting screw 121 is rotated, the guide plate 123 is moved in the vertical direction under the restriction of the stabilizing rod 113 until the support plate 122 moves to the target height.

[0035] Next, as the supporting horizontal plate 122 moves to the target height, it provides power to the adjusting section, causing the two adjusting sections to move laterally relative to each other. At this time, Figure 4 Based on and combined Figure 5 , Figure 6 As shown, the adjusting section includes adjusting plates 124 movably disposed inside the material receiving trough 111. The adjusting plates 124 are symmetrically arranged, and load springs 127 are elastically connected between the adjusting plates 124 and the inner wall of the material receiving trough 111. The load springs 127 provide support for the adjusting plates 124. In the initial stage, the raw material is conveyed into the material receiving trough 111. Under the elastic action of the load springs 127, the adjusting plates 124 on both sides are responsible for limiting the displacement of the raw material in the material receiving trough 111. Therefore, as the rotating disk 110 rotates, the corresponding raw material in each material receiving trough 111 is conveyed to the image acquisition area, and the setting of the adjusting plates 124 can maintain the stability of the raw material and convey it to the image acquisition area. Figure 3 The image is transported to the location of the image acquisition device 102 so that images can be acquired through the image acquisition device 102, thereby improving the quality of the acquired images and the accuracy of subsequent analysis.

[0036] Furthermore, to accommodate raw materials of different sizes and models, a receiving area 125 for receiving raw materials is formed between the two adjusting plates 124, and a buffer zone 126 is formed between the adjusting plates 124 and the inner wall of the material receiving trough 111, the buffer zone 126 accommodating the load spring 127; thus, when the raw material is transferred, it first enters the receiving area 125, and then the transfer operation is carried out; on the other hand, combined with Figure 6 , Figure 7 , Figure 8 As shown, an auxiliary plate 124a is fixedly installed at the bottom of the adjusting plate 124. The auxiliary plate 124a is slidably connected to the guide groove 111a in the material receiving trough 111. The auxiliary plate 124a is L-shaped and has a vertical end and an extended end. Under normal conditions, there is a gap between the two vertical ends, and the connection between the extended end and the vertical end is bent outward. During transfer, since the middle part of the supporting horizontal plate 122 is an arc surface, the supporting horizontal plate 122 has a raised end and a sunken end. A downward slope is formed from the raised end to the sunken end. This downward slope is responsible for guiding the auxiliary plate 124a laterally, forcing the receiving area 125 to expand. Its working principle is as follows:

[0037] In the initial state, the arc surface of the support plate 122 is located between the two vertical ends and close to the vertical ends. At this time, the receiving area 125 between the two adjusting plates 124 can accommodate the smallest size of raw materials. When it is necessary to inspect raw materials of larger size, the support plate 122 moves upward, and the force of the support plate 122 on the outer end overcomes the elastic potential energy of the load spring 127, forcing the outer end of the auxiliary plate 124a to slide along the inclined surface of the support plate 122. The auxiliary plate 124a moves to both sides under the guidance of the support plate 122. At the same time, the receiving area 125 between the adjusting plates 124 expands and the buffer zone 126 shrinks. That is, the expansion of the receiving area 125 is equal to the shrinkage of the buffer zone 126, saving time.

[0038] In this way, the enlarged accommodating area 125 can accommodate larger sizes of raw materials, making it compatible with the materials. The expansion process of the adjusting plate 124 is referenced. Figure 6 Arrows h1 and h2 indicate that when the accommodating area 125 shrinks again, the height of the supporting plate 122 is reduced, and the adjusting plate 124 is driven back by the elastic action of the load spring 127. This process is as follows: Figure 6 Middle arrows f1 and f2;

[0039] In other words, by adjusting the height of the support plate 122, the two side adjustment plates 124 are caused to retract inward or expand outward, thus restricting the raw material to be tested. At the same time, the accommodating area 125 is matched with the size and model of the raw material to be tested, thereby enabling the testing of raw materials of different sizes, improving testing efficiency and practicality.

[0040] In addition, combined Figure 9As shown, raw materials that pass or fail the inspection are sorted using an image acquisition device 102. The image acquisition device 102 includes a collection box 103a, a telescopic plate 103b, and a pneumatic nozzle. The pneumatic nozzle is located at the end of the telescopic plate 103b, which is slidably positioned at the top of the collection box 103a. When the length of the raw material to be tested increases or decreases, an external power source, such as a hydraulic rod, drives the telescopic plate 103b to move in order to adjust the distance between it and the raw material. Then, the pneumatic nozzle blows air from the receiving area 125 into the collection box 103a for centralized collection. Furthermore, a partition 103c is provided at the bottom of the telescopic plate 103b and near the end of the pneumatic nozzle. The partition 103c is used to intercept the raw material during sorting and guide it into the collection box 103a in conjunction with the airflow, preventing the raw material from deviating from the feeding path and improving sorting efficiency.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spring appearance inspection device based on visual analysis, characterized in that: It includes a testing station (100), a feeding device (101), an image acquisition device (102), a sorter (103), and a rotating disk (110) for rotating and conveying raw materials. The rotating disk (110) is connected to the drive unit, and several material storage tanks (111) for holding raw materials are opened in an array on the rotating disk (110). An adjustment mechanism (120) is provided outside the rotating disk (110). The adjustment mechanism (120) includes an adjustment part located at the bottom of the rotating disk (110) and an adjustment part located in the material receiving trough (111). The adjustment part can control the adjustment part according to the size of the raw material to be measured. The adjustment part is manually operated as an external power source to make the adjustment part move laterally. The adjustment part adapts to the raw material by changing the size of the material receiving trough (111) and restricts the raw material to achieve stable conveying of the raw material. The adjustment unit includes an adjustment screw (121) located on the central axis of the rotating disk (110) and a support plate (122) located directly below each material trough (111). The adjustment screw (121) is threadedly connected to a guide plate (123), and its top is rotatably connected to the extension plate (112). The distal ends of several of the guide plates (123) are fixedly connected to the support plate (122). The adjusting section includes adjusting plates (124) movably disposed inside the material receiving trough (111). The adjusting plates (124) are symmetrically arranged. A load spring (127) is elastically connected between the adjusting plates (124) and the inner wall of the material receiving trough (111). The load spring (127) provides support for the adjusting plates (124). The adjusting plates (124) on both sides are responsible for limiting the displacement of the raw material in the material receiving trough (111) and maintaining the stability of the raw material. A receiving area (125) for receiving raw materials is formed between the two side adjustment plates (124). An auxiliary plate (124a) is fixedly provided at the bottom of the adjusting plate (124). The auxiliary plate (124a) is slidably connected to the guide groove (111a) in the material receiving trough (111). The auxiliary plate (124a) is L-shaped and has a vertical end and an extended end. Under normal conditions, there is a gap between the two vertical ends, and the connection between the extended end and the vertical end is bent outward. The middle part of the support plate (122) is an arc surface. The support plate (122) has a raised end and a sunken end. A slope is formed from the raised end to the sunken end. The slope is responsible for guiding the auxiliary plate (124a) laterally, forcing the area of ​​the receiving area (125) to expand.

2. The spring appearance inspection device based on visual analysis according to claim 1, characterized in that: The drive unit includes a sorter (103), the output shaft of which is fixedly connected to a plurality of extension plates (112) and the rotating disk (110), and the sorter (103) is fixed on a support plate (104) on the inspection table (100).

3. The spring appearance inspection device based on visual analysis according to claim 1, characterized in that: The bottom of the extension plate (112) is symmetrically provided with a stabilizing rod (113). The stabilizing rod (113) passes through the guide plate (123) and is used to restrict the rotation of the guide plate (123). The stabilizing rod (113) and the guide plate (123) are slidably arranged to cause the guide plate (123) to move in the vertical direction.

4. The spring appearance inspection device based on visual analysis according to claim 1, characterized in that: A buffer zone (126) is formed between the adjusting plate (124) and the inner wall of the feeding trough (111), and the buffer zone (126) contains the load spring (127).

5. The spring appearance inspection device based on visual analysis according to claim 1, characterized in that: The image acquisition device (102) includes a material collection box (103a), a telescopic plate (103b), and a pneumatic nozzle. The pneumatic nozzle is located at the end of the telescopic plate (103b). The telescopic plate (103b) is slidably located at the top of the material collection box (103a). A partition (103c) is also provided at the bottom of the telescopic plate (103b) and near the end of the pneumatic nozzle. The partition (103c) is used to intercept the raw material during material distribution and guide the raw material into the material collection box (103a) in conjunction with the airflow.

Images