Online detection device based on machine vision

Abstract

The utility model relates to the technical field of machine vision detection, and particularly discloses an online detection device based on machine vision. The online detection device comprises a machine frame, an imaging module and a detection terminal, the imaging module and the detection terminal are installed on the machine frame, the machine frame is installed on a production line to be detected, and a reserved space for containing the imaging module on the machine frame is communicated with an operation channel on the side face of the production line to be detected so that the imaging module can be assembled, disassembled and debugged through the operation channel. And the imaging module is used for performing reflection imaging on the product on the to-be-detected production line under loading and unloading debugging, and presenting the reflection imaging to a detection view field of the detection terminal, so that the detection terminal performs online detection on the product based on machine vision. According to the technical scheme, the on-line detection device is modularly designed, so that the imaging module can be assembled, disassembled and debugged in the operation channel to adapt to the imaging requirement of the detection terminal, and the detection device can achieve the purposes of adapting to production line installation and implementing on-line detection of products.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of machine vision detection, especially online detection device based on machine vision. BACKGROUND

[0002] In modern manufacturing industry, product quality control is crucial. With the continuous expansion of production scale and the continuous improvement of production efficiency, online quality detection of product production line can be implemented based on machine vision detection technology. Machine vision detection can quickly and accurately obtain image information of the product to be detected, and analyze and process the image through image processing algorithm, so as to judge whether the product has defects or whether it meets the quality standard. Some production lines have been completed and put into operation, and their spatial layout and operation process are relatively fixed. The traditional detection device is difficult to install on the production line to implement online detection. UTILIT Y MODEL CONTENT

[0003] In view of the above technical problems, the utility model provides an online detection device based on machine vision, which can be installed on the production line and implement online detection of products.

[0004] The utility model embodiment provides the following scheme:

[0005] The utility model embodiment provides an online detection device based on machine vision, which comprises a rack, an imaging module and a detection terminal installed on the rack.

[0006] The rack is installed on the production line to be detected, and the reserved space for accommodating the imaging module on the rack is connected with the operation channel on the side of the production line to be detected, so that the imaging module can be installed, disassembled and debugged through the operation channel.

[0007] The imaging module is used for reflecting imaging of the product on the production line to be detected during installation, disassembly and debugging, and presenting the detection field of the detection terminal, so that the detection terminal can perform online detection of the product based on machine vision.

[0008] In an optional embodiment, the device further comprises:

[0009] The guide mechanism is installed on the rack along the installation and disassembly direction of the imaging module in the reserved space, and is used for guiding the imaging module during installation and disassembly.

[0010] In an optional embodiment, the guide mechanism comprises:

[0011] The first guide rail is installed on the first end plate and the second end plate of the rack at both ends.

[0012] The second guide rail is installed on the first end plate and the second end plate at both ends, and the second guide rail is parallel to the first guide rail.

[0013] In an alternative embodiment, the device further comprises:

[0014] At least one positioning member is installed on the imaging module, and the positioning member is used to cooperate with a positioning hole on the rack when the imaging module is installed on the rack to position the installation position of the imaging module.

[0015] In an alternative embodiment, the imaging module comprises:

[0016] A third end plate is arranged close to the operation channel;

[0017] A fourth end plate is arranged parallel to the third end plate;

[0018] A plurality of support columns are installed between the third end plate and the fourth end plate;

[0019] A first imaging assembly is installed between the third end plate and the fourth end plate at a preset first angle interval to image the products on the product line to be inspected;

[0020] A second imaging assembly is installed between the third end plate and the fourth end plate at a preset second angle interval to reflect the imaging image on the first imaging assembly.

[0021] In an alternative embodiment, the imaging module further comprises:

[0022] A light source is installed between the third end plate and the fourth end plate to image and light the first imaging assembly and the second imaging assembly.

[0023] In an alternative embodiment, the imaging module further comprises:

[0024] A handle is installed on the outer side of the third end plate close to the operation channel.

[0025] In an alternative embodiment, the first imaging assembly and the second imaging assembly each comprise:

[0026] A mounting seat;

[0027] A first rotating mechanism is installed on one end of the mounting seat close to the operation channel;

[0028] A second rotating mechanism is installed on the other end of the mounting seat;

[0029] An imaging mirror is installed on the mounting seat.

[0030] In an alternative embodiment, the mounting seat is provided with a first T-shaped groove and a second T-shaped groove on two parallel surfaces perpendicular to the imaging mirror respectively; the first imaging assembly and the second imaging assembly each further comprise:

[0031] A plurality of fixed hooks are distributed along the length direction of the imaging mirror, the bending part of each fixed hook is close to the imaging mirror, the fixed part of the fixed hook on the first side of the imaging mirror extends to the first T-shaped groove, and the fixed part of the fixed hook on the second side of the imaging mirror extends to the second T-shaped groove;

[0032] A plurality of T-shaped nuts are installed in the first T-shaped groove and the second T-shaped groove, and the plurality of T-shaped nuts are arranged in correspondence with the number of the plurality of fixed hooks;

[0033] A plurality of bolts are arranged in correspondence with the plurality of T-shaped nuts and are installed in the T-shaped nuts through the through holes of the fixed parts.

[0034] In an optional embodiment, a hollow hole is arranged on the rack to avoid the second rotating mechanism.

[0035] Compared with the prior art, the online detection device based on machine vision has the following advantages:

[0036] The online detection device comprises a rack, an imaging module and a detection terminal installed on the rack, the rack is installed on a to-be-detected production line, a reserved space for accommodating the imaging module on the rack is communicated with an operation channel on the side of the to-be-detected production line, so that the imaging module is installed, dismounted and debugged through the operation channel; the imaging module is used for reflecting imaging on the product on the to-be-detected production line under installation, dismounting and debugging, and the imaging module presents the detection field of view to the detection terminal, so that the detection terminal performs online detection on the product based on machine vision. The technical scheme modularly designs the online detection device, so that the imaging module can be installed, dismounted and debugged through the operation channel to adapt to the imaging requirement of the detection terminal, and the detection device can be installed on the production line and achieve the purpose of online detection of the product. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0038] Figure 1 The structure schematic view of the online detection device based on machine vision provided by the utility model embodiment is shown in the figure;

[0039] Figure 2 The A direction part schematic view of the online detection device based on machine vision provided by the utility model embodiment is shown in the figure; Figure 1

[0040] Figure 3 The structure schematic view of the imaging module provided by the utility model embodiment is shown in the figure;

[0041] ​Figure 4 The utility model provides a part of B of the imaging module of the imaging assembly is shown in the schematic view. Figure 3 The utility model provides a part of B of the imaging module of the imaging assembly is shown in the schematic view.

[0042] Figure 5 The utility model provides a part of B of the imaging module of the imaging assembly is shown in the schematic view.

[0043] Mark explanation: 1 - frame, 2 - imaging module, 3 - detection terminal, 4 - guiding mechanism, 5 - positioning piece, 6 - reserved space,

[0044] 11 - first end plate, 12 - second end plate, 13 - strut, 14 - fan, 15 - clearance hole,

[0045] 21 - third end plate, 22 - fourth end plate, 23 - support column, 24 - first imaging assembly, 25 - second imaging assembly, 26 - light source, 27 - handle,

[0046] 41 - first guide rail,

[0047] 201 - mounting seat, 202 - first rotating mechanism, 203 - second rotating mechanism, 204 - imaging mirror, 205 - fixed hook, 206 - first T-shaped groove, 207 - second T-shaped groove, 208 - fixed part, 209 - curved part, 210 - connecting block, 211 - rotating shaft, 212 - shaft seat, 213 - through hole. DETAILED DESCRIPTION

[0048] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments only are a part of the embodiments of the utility model, instead of all the embodiments, and all other embodiments obtained by the person skilled in the art based on the embodiments of the utility model belong to the range of protection of the embodiments of the utility model.

[0049] Please refer to Figure 1 , Figure 1 The utility model provides a part of B of the imaging module of the imaging assembly is shown in the schematic view.

[0050] The rack 1 can be provided as a frame structure, and the rack 1 is installed on a product line to be detected, and the rack 1 can be fixedly installed on the product line to be detected by fasteners. The product line to be detected is a production line for online detection of products, which can be a production line for printing bar codes, or other types of production lines, which are not specifically limited here. The reserved space 6 for accommodating the imaging module 2 on the rack 1 is connected to an operating channel on the side of the product line to be detected, so that the imaging module 2 is installed, removed and debugged by the operating channel. The operating channel is a walkway located on the side of the production line, which is reserved or designed in the overall layout structure of the production line. Its main purpose is to facilitate the operation of the operating personnel on the related devices installed on the production line, or the maintenance of the production line by the equipment maintenance personnel. The reserved space 6 is used for installing the imaging module 2, and after the reserved space 6 is connected to the operating channel, the imaging module 2 can be installed or removed in the operating channel.

[0051] The imaging module 2 can be an optical imaging unit composed of multiple imaging components, which is used as an integrated functional assembly. The imaging module 2 is used for reflection imaging of products on the product line to be detected under installation, removal and debugging, and presents the detection field of view to the detection terminal 3, so that the detection terminal 3 performs online detection of the products based on machine vision.

[0052] The imaging components included in the imaging module 2 can be set based on the actual situation of the product line to be detected. For example, in some production lines for producing long and narrow parts, the product length is relatively long but the width is relatively narrow, and the entire surface of the product needs to be continuously detected while ensuring clear imaging. The imaging module 2 can be configured to be composed of multiple imaging mirrors, for example, composed of a first imaging mirror and a second imaging mirror. The first imaging mirror is a long strip-shaped plane mirror, the length of which is customized according to the length range of the product to be detected, and the width is appropriate to ensure that the width direction of the product can be completely covered. The plane mirror is installed at an angle so that it can receive the light reflected from the surface of the product and image the surface of the product in the optical path space inside the imaging module 2. The second imaging mirror is a curved mirror, which is placed at a suitable position behind the first imaging mirror. The curved surface is designed to converge and compress the long and narrow image formed by the first imaging mirror, so that the light is reflected towards the detection terminal 3. In this process, the field of view is effectively reduced, the brightness and clarity of the image are enhanced, and the detection terminal 3 can better capture details. According to the length of the product, a plurality of auxiliary mirrors can be added in the optical path as needed. These auxiliary mirrors are also plane mirrors, which are used to change the direction of the optical path and guide the light to accurately pass between the mirrors and finally reach the detection terminal 3, so that the imaging detection of the long and narrow product from the beginning to the end can be ensured. Based on the imaging module 2, the specific area or details of the product can be focused and the field of view can be reduced, so that the detection terminal 3 can more clearly and accurately detect the product, and the accuracy of machine vision detection is improved.

[0053] The detection terminal 3 can be installed on the rack through the fixing plate. The detection terminal 3 can be configured based on the actual needs of the production line to be detected, for example, it can be configured as a line scanning camera, or it can be configured as other machine vision detection terminals 3 containing lenses, which can perform online detection based on the images presented by the imaging module 2. In this case, no specific limitation is made. In order to dissipate heat from the detection terminal 3, a fan 14 can also be installed on the detection device to dissipate heat from the online detection device.

[0054] In actual application, on the production line with fixed spatial layout, due to limited operation space and the need to accurately implement the installation and disassembly of the imaging module, the imaging module is difficult to smoothly enter and exit the reserved space on the rack without auxiliary guidance. Based on this, in a specific embodiment, the detection device further comprises a guide mechanism 4.

[0055] The guide mechanism 4 is installed on the rack 1 along the installation and disassembly direction of the imaging module 2 in the reserved space 6, and is used to guide the imaging module 2 during installation and disassembly. The guide mechanism 4 can be composed of a matching guide rail and slider assembly. The guide rail is installed on the rack 1, and its length and position are set according to the installation and disassembly path of the imaging module 2 to ensure that it can cover the entire installation and disassembly stroke. The slider is connected to the housing or a specific mounting bracket of the imaging module 2, so that the imaging module 2 moves smoothly along the guide rail under the action of the slider. Of course, a guide rod and a guide sleeve structure can also be used. The guide rod is installed on the rack 1 and has sufficient strength and straightness, and the guide sleeve is installed on the imaging module 2. When the imaging module 2 is installed or disassembled, the operator only needs to apply appropriate external force to make the imaging module 2 move in the predetermined direction under the constraint of the guide mechanism 4, so that the imaging module 2 can be easily installed in or disassembled from the reserved space 6 of the rack 1.

[0056] For example, the guide mechanism 4 includes a first guide rail 41 and a second guide rail (not shown in the figure). The two ends of the first guide rail 41 are respectively installed on the first end plate 11 and the second end plate 12 of the rack 1. A support rod 13 is installed between the first end plate 11 and the second end plate 12. The two ends of the second guide rail are respectively installed on the first end plate 11 and the second end plate 12, and the second guide rail is parallel to the first guide rail 41. The cross sections of the first guide rail 41 and the second guide rail are both L-shaped and are installed in parallel to form a “└┘” type structure that carries the imaging module 2. The corresponding part of the imaging module 2 can be embedded in the “└┘” type structure. The L-shaped guide rail can not only support the imaging module 2 from below to provide vertical support force and prevent it from sinking, but also limit the movement of the imaging module 2 in the horizontal direction from the side, so that it can only translate along the length direction of the guide rail, accurately determining the installation position and movement path of the imaging module 2.

[0057] For example, please refer to Figure 3 ,Figure 3 This is a schematic diagram of the imaging module 2. The imaging module 2 includes a third end plate 21, a fourth end plate 22, multiple support columns 23, a first imaging component 24, and a second imaging component 25.

[0058] The third end plate 21 is positioned close to the operating channel, and the fourth end plate 22 is positioned parallel to the third end plate 21. Multiple support columns 23 are installed between the third end plate 21 and the fourth end plate 22. The third end plate 21, the fourth end plate 22, and the multiple support columns 23 can construct a stable frame structure, providing a stable mounting platform for the internal components of the imaging module 2. During long-term operation, the components are less likely to loosen or shift due to vibration, external forces, or other factors.

[0059] The first imaging component 24 is installed between the third end plate 21 and the fourth end plate 22 at a preset first angle range to image the products on the production line to be inspected; the second imaging component 25 is installed between the third end plate 21 and the fourth end plate 22 at a preset second angle range to reflect the image on the first imaging component 24. The first imaging component 24 can obtain an ideal initial image of the product, and the second imaging component 25 can then perform effective reflective imaging based on this, optimizing the field of view and accurately transmitting the image to the inspection terminal 3. This allows the image received by the inspection terminal 3 to clearly and accurately reflect the features and details of the product. This structure can reduce the distance between the inspection terminal 3 and the production line to be inspected through multiple reflections. In actual production environments, the space around the production line is often limited, and the imaging module 2 with this structure can make more effective use of space.

[0060] For further details, please refer to Figure 4 , Figure 4 for Figure 2 A schematic diagram of the B-direction portion is shown. The detection device also includes at least one positioning element 5. The positioning element 5 is mounted on the imaging module 2 and is used to position the imaging module 2 in place by cooperating with the positioning holes on the frame 1 when the imaging module 2 is mounted on the frame 1. The positioning element 5 can be a positioning pin or a positioning block, as long as it can position the imaging module 2 and the frame 1. The layout of the positioning element 5 and the positioning holes on the frame 1 corresponds to each other, so that when the imaging module 2 is close to the mounting position on the frame 1, the positioning element 5 can be accurately inserted into the corresponding positioning hole, thereby limiting the displacement of the imaging module 2 and fixing it in the predetermined accurate position, ensuring that key parameters such as the imaging optical path meet the design requirements.

[0061] In actual production environments, poor lighting conditions may occur, leading to insufficient imaging quality from the imaging components. Therefore, in one specific embodiment, the imaging module 2 further includes a light source 26.

[0062] The light source 26 is installed between the third end plate 21 and the fourth end plate 22 to provide imaging light for the first imaging assembly 24 and the second imaging assembly 25. The type of the light source 26 can be selected based on actual needs, and the brightness and light-emitting angle can be flexibly adjusted to ensure that the surface of the product to be inspected can be sufficiently and uniformly illuminated.

[0063] Further, the imaging module 2 further comprises a handle 27. The handle 27 is installed on the outer side of the third end plate 21 near the operation channel. Through the handle 27, the operator can conveniently install and disassemble the imaging module 2, thereby improving the convenience of implementation.

[0064] The first imaging assembly 24 and the second imaging assembly 25 play a key role in accurate imaging. However, different production lines and products to be inspected often have diversified needs. If the imaging assembly lacks a convenient adjustment method, it is difficult to quickly achieve the ideal imaging state, and a large amount of time and labor cost is consumed for repeated calibration and debugging. Based on this, in one specific embodiment, please refer to Figures 2-4 , the first imaging assembly 24 and the second imaging assembly 25 each comprise a mounting seat 201, a first rotating mechanism 202, a second rotating mechanism 203, and an imaging mirror 204.

[0065] The mounting seat 201 can be correspondingly provided based on the structure of the imaging mirror 204. For example, when the imaging mirror 204 is a long strip structure, the mounting seat 201 is also provided as a long strip structure, and the imaging mirror 204 can be pasted on the mounting seat 201. The first rotating mechanism 202 is installed at one end of the mounting seat 201 near the operation channel; the second rotating mechanism 203 is installed at the other end of the mounting seat 201.

[0066] The first rotating mechanism 202 and the second rotating mechanism 203 can be provided based on actual needs, please refer to Figure 5 , Figure 5 is a schematic view of the structure, which is provided to comprise a connecting block 210, a rotating shaft 211, and a shaft seat 212. The connecting block 210 is fixedly connected with the rotating shaft 211 and the mounting seat 201. The rotating shaft 211 and the shaft seat 212 are rotatably connected. The shaft seat 212 of the first rotating mechanism 202 is installed on the third end plate 21, and the shaft seat 212 of the second rotating mechanism 203 is installed on the fourth end plate 22. Locking screws are provided on both shaft seats 212. After the locking screws are loosened, the imaging assembly can be rotated.

[0067] Please continue to refer to Figure 2 , in order to facilitate the operation of the second rotating mechanism 203, an avoidance hole 15 is provided on the rack 1 to avoid the second rotating mechanism 203. Through the avoidance hole 15, the second rotating mechanism 203 can be positioned, thereby facilitating the loosening of the locking screws on the second rotating mechanism 203 when the first rotating mechanism 202 and the second rotating mechanism 203 are adjusted to rotate.

[0068] In practical applications, it is difficult to maintain the imaging mirror 204 pasted on the mounting seat 201. Therefore, referring to Figure 5 In a specific embodiment, the mounting seat 201 is provided with a first T-shaped groove 206 and a second T-shaped groove 207 on two parallel surfaces perpendicular to the imaging mirror 204; the first imaging assembly 24 and the second imaging assembly 25 each further include a plurality of fixed hooks 205, T-shaped nuts and bolts arranged in groups.

[0069] The plurality of fixed hooks 205 are distributed along the length direction of the imaging mirror 204, the curved portion 209 of each fixed hook 205 abuts against the imaging mirror 204, the fixed portion 208 of the fixed hook 205 located on the first side surface of the imaging mirror 204 extends to the first T-shaped groove 206, and the fixed portion 208 of the fixed hook 205 located on the second side surface of the imaging mirror 204 extends to the second T-shaped groove 207; a plurality of T-shaped nuts (not shown in the figure) are installed in the first T-shaped groove 206 and the second T-shaped groove 207, and the plurality of T-shaped nuts are correspondingly arranged in number with the plurality of fixed hooks 205; a plurality of bolts (not shown in the figure) are correspondingly arranged with the plurality of T-shaped nuts to be installed in the T-shaped nuts through the through hole 213 of the fixed portion 208.

[0070] The fixed hook 205 plays a stable clamping role on the imaging mirror 204 from both sides, ensures stable fixation of the imaging mirror 204, the plurality of T-shaped nuts are correspondingly installed in the first T-shaped groove 206 and the second T-shaped groove 207, the number of which matches the fixed hook 205, the T-shaped nut can be flexibly moved in the T-shaped groove along the direction of the groove, and the position is convenient to adjust. Through the one-to-one correspondence between the plurality of bolts and the T-shaped nuts, the bolt is installed in the T-shaped nut after passing through the through hole 213 of the fixed portion 208 of the fixed hook 205, and the fixed hook 205 is firmly fixed on the mounting seat 201 by tightening the bolt, thereby realizing stable and reliable fixation of the imaging mirror 204.

[0071] The technical scheme provided in the embodiment of the utility model has at least the following technical effects or advantages:

[0072] The online detection device comprises a rack, an imaging module and a detection terminal installed on the rack, the rack is installed on a to-be-detected production line, a reserved space for accommodating the imaging module on the rack is communicated with an operation channel on the side of the to-be-detected production line, so that the imaging module is loaded, unloaded and debugged through the operation channel; the imaging module is used for reflecting imaging on the product on the to-be-detected production line under loading, unloading and debugging, and the imaging module presents the imaging to the detection field of the detection terminal, so that the detection terminal performs online detection on the product based on machine vision. The technical scheme modularly designs the online detection device, so that the imaging module can be loaded, unloaded and debugged through the operation channel to adapt to the imaging demand of the detection terminal, and the detection device can be installed on the production line and achieve the purpose of online detection of the product.

[0073] While the preferred embodiments of the application have been described, those skilled in the art will be able to devise various arrangements which, although not explicitly described or shown herein, embody the principles of the application, and thus, are within its spirit and scope. Accordingly, the appended claims are intended to embrace all such arrangements and modifications as fall within the scope of the application.

[0074] Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A machine vision based online inspection apparatus, characterized in that, The device comprises a rack, an imaging module and a detection terminal installed on the rack; The rack is installed on a production line to be detected, and a reserved space for accommodating the imaging module on the rack is communicated with an operation channel on the side of the production line to be detected, so that the imaging module is loaded, unloaded and debugged by the operation channel; The imaging module is used for reflecting imaging of products on the production line to be detected during the loading, unloading and debugging, and presents the imaging to a detection field of view of the detection terminal, so that the detection terminal performs online detection of the products based on machine vision.

2. The machine vision-based online inspection apparatus according to claim 1, wherein, The device further comprises: A guide mechanism installed on the rack along the loading and unloading direction of the imaging module in the reserved space, the guide mechanism being used for guiding the imaging module during the loading, unloading and debugging.

3. The machine vision-based online inspection apparatus of claim 2, wherein, The guide mechanism comprises: A first guide rail installed on a first end plate and a second end plate of the rack at both ends; A second guide rail installed on the first end plate and the second end plate at both ends, the second guide rail being parallel to the first guide rail.

4. The machine vision-based online inspection apparatus of claim 1, wherein, The device further comprises: At least one positioning member installed on the imaging module, the positioning member being used for positioning the installation position of the imaging module by cooperating with a positioning hole on the rack when the imaging module is installed on the rack.

5. The machine vision-based online inspection apparatus of claim 1, wherein, The imaging module comprises: A third end plate arranged close to the operation channel; A fourth end plate arranged parallel to the third end plate; A plurality of support columns installed between the third end plate and the fourth end plate; A first imaging assembly installed between the third end plate and the fourth end plate at a preset first angle interval to image the products on the production line to be detected; A second imaging assembly installed between the third end plate and the fourth end plate at a preset second angle interval to reflect image the imaging image on the first imaging assembly.

6. The machine vision-based online inspection apparatus of claim 5, wherein, The imaging module further comprises: A light source installed between the third end plate and the fourth end plate to image and supplement light for the first imaging assembly and the second imaging assembly.

7. The machine vision-based online inspection apparatus of claim 5, wherein, The imaging module further comprises: A handle installed on the outer side of the third end plate close to the operation channel.

8. The machine vision-based online inspection apparatus of claim 5, wherein, The first imaging assembly and the second imaging assembly each comprise: A mounting seat; A first rotating mechanism installed on one end of the mounting seat close to the operation channel; A second rotating mechanism installed on the other end of the mounting seat; An imaging mirror installed on the mounting seat.

9. The machine vision-based online inspection apparatus of claim 8, wherein, The mounting seat is provided with a first T-shaped groove and a second T-shaped groove on two parallel surfaces perpendicular to the imaging mirror; the first imaging assembly and the second imaging assembly each further comprise: A plurality of fixed hooks spaced apart along the length direction of the imaging mirror, a curved portion of each fixed hook being close to the imaging mirror, a fixed portion of the fixed hook on the first side of the imaging mirror extending to the first T-shaped groove, and a fixed portion of the fixed hook on the second side of the imaging mirror extending to the second T-shaped groove; A plurality of T-shaped nuts installed in the first T-shaped groove and the second T-shaped groove, the plurality of T-shaped nuts being provided in a number corresponding to the plurality of fixed hooks. A plurality of bolts are arranged corresponding to the plurality of T-shaped nuts to be installed in the T-shaped nuts through the through holes of the fixing portions.

10. The machine vision-based online inspection apparatus of claim 8, wherein, The rack is provided with a hollow hole for avoiding the second rotating mechanism.

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