Product visual inspection device

Abstract

The utility model relates to a visual inspection device for products. The visual inspection device comprises a screw rod sliding table, a camera assembly, a light source assembly, a first photoelectric sensor, a second photoelectric sensor and a controller, the camera assembly is installed on the lead screw sliding table. The light source assembly is installed between the camera assembly and the product. The first photoelectric sensor is installed between the camera assembly and the product, the second photoelectric sensor and the first photoelectric sensor are installed at intervals in the first direction, and the first photoelectric sensor, the second photoelectric sensor and the camera assembly are all connected with the controller. Compared with the prior art, according to the utility model, a product is shot through the camera assembly and the light source assembly, so that the inspection of the product is realized; the first photoelectric sensor detects whether products arrive or not, the second photoelectric sensor and the first photoelectric sensor are installed at intervals in the first direction, whether defective products arrive or not is detected, the screening and removing device can be matched for removing, and the advantages that the products on an assembly line are continuously monitored are achieved.

Description

Technical Field

[0001] The utility model relates to visual inspection, in particular to a product visual inspection device. Background Art

[0002] With the continuous improvement of living standards, people's requirements for food safety have also increased significantly, and the requirements for the shelf life of products are more stringent. Therefore, strict inspections must be carried out on food before leaving the factory to prevent unqualified products from entering the market, which puts more stringent requirements on the accuracy of visual inspection.

[0003] After retrieval, the authorized announcement number CN210015058U discloses a PCB visual inspection mechanism, which specifically discloses: including a mounting base plate and a light source, a camera and an adjusting device arranged on the mounting base plate. The light source is arranged at the lower edge of the mounting base plate. The camera has a movable lens at the lower end. There is a lens through hole in the middle of the light source with an inner diameter larger than the outer diameter of the lens. The lens is arranged directly above the lens through hole. The lens is connected to the adjusting device, and the adjusting device is slidably connected to the mounting base plate. The lens is adjusted to slide up and down along the mounting base plate through the adjusting device.

[0004] However, this prior art is only applicable to the inspection of static PCBs and is not applicable to the inspection of dynamic products. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the defect of the above-mentioned prior art that only static products can be inspected, and to provide a product visual inspection device.

[0006] The purpose of the utility model can be realized by the following technical solutions:

[0007] According to one aspect of the utility model, a product visual inspection device is provided for product inspection. The product is located on a conveyor belt, and the conveying direction of the conveyor belt is the first direction. The inspection device includes a lead screw slide table, a camera assembly, a light source assembly, a first photoelectric sensor, a second photoelectric sensor and a controller. The moving direction of the lead screw slide table is perpendicular to the first direction. The camera assembly for photographing the product is installed on the lead screw slide table. The light source assembly is installed between the camera assembly and the product. The first photoelectric sensor is installed between the camera assembly and the product. The second photoelectric sensor is installed at an interval from the first photoelectric sensor along the first direction. The first photoelectric sensor, the second photoelectric sensor and the camera assembly are all electrically connected to the controller.

[0008] As a preferred technical solution, the camera assembly includes a camera, a main camera base plate, and a camera adjustment plate. The camera is mounted on the camera adjustment plate. The camera adjustment plate is provided with a straight slot, and the extending direction of the straight slot is parallel to the moving direction of the lead screw slide; the camera adjustment plate and the camera mounting plate are adjustably connected through the straight slot.

[0009] As a preferred technical solution, the inspection device further includes a housing, which is mounted on the main camera base plate, and the camera, the camera adjustment plate, and the light source assembly are all mounted inside the housing.

[0010] As a preferred technical solution, a photoelectric sensor mounting plate is mounted on one side of the housing close to the product, and the first photoelectric sensor and the second photoelectric sensor are adjustably mounted on the housing through the photoelectric sensor mounting plate.

[0011] As a preferred technical solution, the device further includes a light-shielding curtain located around the product. A pressure strip is mounted on one side of the housing close to the product, and one end of the light-shielding curtain is mounted on the pressure strip.

[0012] As a preferred technical solution, a wire-passing plate is further provided on the main camera base plate. The wire-passing plate is in contact with the housing, and a wire-passing hole is provided at the contact position of the wire-passing plate, and a through hole is provided at the contact position of the housing.

[0013] As a preferred technical solution, the light source assembly includes a first light source, a second light source, a first light source mounting plate, and a second light source mounting plate. A plurality of straight slots are provided on both the first light source mounting plate and the second light source mounting plate, and they are adjustably connected to the camera assembly; the first light source and the second light source are respectively adjustably mounted on the first light source mounting plate and the second light source mounting plate through the straight slots.

[0014] As a preferred technical solution, the first light source includes a first light source housing and a first light-emitting device and a reflecting mirror mounted inside the first light source housing. The reflecting mirror is mounted in the irradiation direction of the first light-emitting device; the camera assembly includes a camera, and a transparent shooting window is provided on the first light source housing, and the camera is in contact with the shooting window.

[0015] As a preferred technical solution, the second light source includes a second light source housing and a second light-emitting device. One end of the second light source housing is communicated with the first light source, and the other end face is circular. The second light-emitting device is mounted on the circular end face of the second light source housing, and the product is located in the irradiation direction of the second light-emitting device.

[0016] As a preferred technical solution, the extending directions of the plurality of straight slots on the first light source mounting plate and the second light source mounting plate are parallel to the first direction or the moving direction of the lead screw slide.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1) The utility model takes pictures of the product through the camera assembly and the light source assembly to realize the inspection of the product; the first photoelectric sensor detects whether the product arrives, and the second photoelectric sensor is installed at an interval from the first photoelectric sensor along the first direction to detect whether the problematic product arrives, which can cooperate with the screening and exclusion device to exclude unqualified products, realizing continuous monitoring of the products on the production line;

[0019] 2) The camera assembly of the utility model can adjust its position through the lead screw slide table, which is convenient for adjusting the distance from the product, and the camera can also be finely adjusted through the camera adjustment plate;

[0020] 3) The light source assembly of the utility model includes a first light source and a second light source. The first light source provides a point light source, and the second light source provides parallel light, which helps the camera assembly to take clearer photos; the installation positions of the first light source and the second light source can be adjusted through the first light source mounting plate and the second light source mounting plate;

[0021] 4) The housing of the utility model can protect the camera assembly and the light source assembly. Installing a light-shielding curtain can be used to block the surrounding light and prevent it from affecting the light source of the camera assembly; the wire passing hole can be used for wire arrangement and passing out of the camera assembly, the light source assembly, the first photoelectric sensor and the second photoelectric sensor and connecting with other devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of a product vision inspection device of the utility model from the first perspective;

[0023] Figure 2 is a schematic diagram of the overall structure of a product vision inspection device of the utility model from the second perspective;

[0024] Figure 3 is a schematic diagram of the overall structure of a product vision inspection device of the utility model from the third perspective;

[0025] Figure 4 is a schematic diagram of the structure of the lead screw slide table, the camera assembly and the light source assembly of the utility model;

[0026] Figure 5 is a cross-sectional view of the first light source of the utility model;

[0027] Figure 6 is a schematic diagram of the structure of the second light source of the utility model;

[0028] The reference numerals in the figures are shown as follows:

[0029] 1. Lead screw slide table, 21. Camera, 22. Main camera base plate, 23. Camera adjustment plate, 24. Wire threading plate, 241. Wire threading hole, 31. First light source, 311. First light source housing, 3111. Shooting window, 312. Reflector, 32. Second light source, 321. Second light source housing, 33. First light source mounting plate, 34. Second light source mounting plate, 4. First photoelectric sensor, 5. Second photoelectric sensor, 6. Cover housing, 61. Photoelectric sensor mounting plate, 62. Stripping bar, 63. Through hole. Detailed implementation mode

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] The present invention provides a product vision inspection device, including a lead screw slide table 1, a camera assembly, a light source assembly, a first photoelectric sensor 4, a second photoelectric sensor 5, a cover housing 6, a light-shielding curtain and a controller. This device is installed on the conveyor belt for product inspection. The product is located on the conveyor belt, and the conveying direction of the conveyor belt is the first direction. The present invention is suitable for monitoring products on the assembly line, such as monitoring the shelf-life spraying code of canned food.

[0032] A camera 21 mounting plate is installed on the lead screw slide table 1. The lead screw slide table 1 is installed perpendicular to the first direction. Therefore, the camera 21 mounting plate can move up and down through the movement of the lead screw slide table 1 to adjust the distance from the product.

[0033] The camera assembly includes a camera 21, a main camera base plate 22 and a camera adjustment plate 23. The camera adjustment plate 23 is L-shaped, with a straight slot at one end, and is adjustably connected to the main camera base plate 22 through the straight slot. The camera 21 is installed at the other end. Therefore, the relative position between the camera 21 and the main camera base plate 22 is adjustable.

[0034] A wire threading plate 24 is installed on the main camera base plate 22. The wire threading plate 24 is in contact with the cover housing 6. A wire threading hole 241 is opened at the position where the wire threading plate 24 is in contact with the cover housing 6. A through hole 63 is opened at the position where the cover housing 6 is in contact with the wire threading plate 24. The wire threading hole 241 and the through hole 63 correspond to each other, and are used for the wire arrangement of the camera assembly, the light source assembly, the first photoelectric sensor 4 and the second photoelectric sensor 5 to pass through and be connected to other devices.

[0035] The light source assembly includes a first light source 31, a second light source 32, a first light source mounting plate 33, and a second light source mounting plate 34. Both the first light source mounting plate 33 and the second light source mounting plate 34 are L-shaped and have straight notches at both ends. One end of the first light source mounting plate 33 is adjustably connected to the camera main base plate 22 through the straight notch, and the other end is adjustably connected to the first light source 31 through the straight notch. One end of the second light source mounting plate 34 is adjustably connected to the camera main base plate 22 through the straight notch, and the other end is adjustably connected to the second light source 32 through the straight notch. Therefore, the relative positions of the first light source 31 and the second light source 32 with respect to the camera main base plate 22 are adjustable.

[0036] The first light source 31 includes a first light source housing 311, a first light-emitting device, and a reflector 312. The first light-emitting device and the reflector 312 are installed inside the first light source housing 311. As shown in the figure, the first light source housing 311 can be a cube. A transparent shooting window 3111 is provided on the first light source housing 311. The camera 21 is in contact with the shooting window 3111, and the product below is photographed through the shooting window 3111. The first light-emitting device is installed on one side inside the first light source housing 311, and the reflector 312 is installed on the other side. The light emitted by the first light-emitting device irradiates onto the reflector 312.

[0037] The second light source 32 includes a second light source housing 321 and a second light-emitting device. One end of the second light source housing 321 is connected to the first light source 31, and the other end face is circular. As shown in the figure, the second light source housing 321 can be a hemisphere. The top of the hemisphere of the second light source housing 321 is connected to the first light source 31. Multiple light sources are installed on the circular ring at the bottom of the hemisphere to form a parallel light source, which irradiates onto the product.

[0038] The first light source 31 and the second light source 32 cooperate to provide light for the camera assembly during shooting, so that the taken photos meet the inspection and judgment requirements.

[0039] The cover 6 is installed on the camera 21 mounting plate. As shown in the figure, it can be a cube and forms a cavity with the camera 21 mounting plate. The camera 21, the camera adjustment plate 23, and the light source assembly are all installed in the cavity. The cover 6 can protect the internal camera 21, the camera adjustment plate 23, and the light source assembly. An optoelectronic sensor mounting plate 61 and a bead 62 are installed on one side edge of the cover 6 close to the product.

[0040] The photoelectric sensor mounting plate 61 includes a first photoelectric sensor mounting plate 61 and a second photoelectric sensor mounting plate 61. The first photoelectric sensor mounting plate 61 is located on the side close to the lead screw slide 1 and between the camera 21 and the product. The second photoelectric sensor mounting plate 61 is located on the side opposite to the lead screw slide 1 and in the first direction of the first photoelectric sensor mounting plate 61. The first photoelectric sensor 4 and the second photoelectric sensor 5 are respectively adjustably mounted on the housing 6 through the first photoelectric sensor mounting plate 61 and the second photoelectric sensor mounting plate 61.

[0041] The pressing strip 62 is provided with mounting holes, and the light-shielding curtain is mounted on the pressing strip 62 through the mounting holes. The light-shielding curtain is located around the product and is used to block the surrounding light to prevent it from affecting the light source of the camera 21. The pressing strip 62 shown in the figure is mounted on both sides in the first direction of the housing 6.

[0042] The controller is electrically connected to the first photoelectric sensor 4, the second photoelectric sensor 5 and the camera assembly.

[0043] The working process of the present utility model is as follows:

[0044] The products on the assembly line pass through this inspection device. When the first photoelectric sensor 4 detects that a product has passed by, the camera assembly takes a picture. If it is a non-conforming product, it will be marked. When the second photoelectric sensor 5 detects that a non-conforming product has passed by, it can cooperate with the screening and rejection device to reject it.

[0045] The present utility model can be used for monitoring products on the assembly line. Moreover, the positions of the camera assembly and the light source assembly are adjustable, and each component is relatively independent, which reduces the difficulty of debugging for the debugging personnel, improves the efficiency, and can be compatible with different types of products.

[0046] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A product visual inspection device, used for product inspection, the product is located on a conveyor belt, the conveying direction of the conveyor belt is a first direction, characterized in that: The inspection device comprises a screw slide (1), a camera assembly, a light source assembly, a first photoelectric sensor (4), a second photoelectric sensor (5) and a controller; the moving direction of the screw slide (1) is perpendicular to a first direction; the camera assembly for photographing a product is mounted on the screw slide (1); the light source assembly is mounted between the camera assembly and the product; the first photoelectric sensor (4) is mounted between the camera assembly and the product, and the second photoelectric sensor (5) is mounted at intervals from the first photoelectric sensor (4) along the first direction; the first photoelectric sensor (4), the second photoelectric sensor (5) and the camera assembly are all electrically connected to the controller.

2. A product visual inspection device according to claim 1, characterized in that: The camera assembly comprises a camera (21), a camera main base plate (22) and a camera adjustment plate (23); the camera (21) is mounted on the camera adjustment plate (23); a straight slot is provided on the camera adjustment plate (23); the straight slot extends in a direction parallel to the moving direction of the screw slide (1); the camera adjustment plate (23) and the camera (21) mounting plate are adjustably connected via the straight slot.

3. A product visual inspection device according to claim 2, characterized in that: The inspection device also includes a cover shell (6), the cover shell (6) is mounted on a camera main base plate (22), and the camera (21), the camera adjustment plate (23) and the light source assembly are all mounted in the cover shell (6).

4. A product visual inspection device according to claim 3, characterized in that: A photoelectric sensor mounting plate (61) is installed on the side of the cover (6) close to the product, and the first photoelectric sensor (4) and the second photoelectric sensor (5) are adjustably mounted on the cover (6) via the photoelectric sensor mounting plate (61).

5. A product visual inspection device according to claim 3, characterized in that: The device also includes a blackout curtain located around the product, a pressure strip (62) is installed on the side of the cover shell (6) close to the product, and one end of the blackout curtain is installed on the pressure strip (62).

6. A product visual inspection device according to claim 3, characterized in that: A threading plate (24) is also provided on the camera main base plate (22), the threading plate (24) is in contact with the housing (6), a threading hole (241) is provided at the contact position of the threading plate (24), and a through hole (63) is provided at the contact position of the housing (6).

7. A product visual inspection device according to claim 1, characterized in that: The light source assembly comprises a first light source (31), a second light source (32), a first light source mounting plate (33) and a second light source mounting plate (34); the first light source mounting plate (33) and the second light source mounting plate (34) are both provided with a plurality of straight slots, which are adjustably connected to the camera assembly; the first light source (31) and the second light source (32) are adjustably mounted on the first light source mounting plate (33) and the second light source mounting plate (34) respectively through the straight slots.

8. A product visual inspection device according to claim 7, characterized in that: The first light source (31) comprises a first light source housing (311) and a first light emitting device and a reflector (312) installed inside the first light source housing (311), wherein the reflector (312) is installed in the irradiation direction of the first light emitting device; the camera assembly comprises a camera (21), wherein the first light source housing (311) is provided with a transparent shooting window (3111), and the camera (21) is in contact with the shooting window (3111).

9. A product visual inspection device according to claim 7, characterized in that: The second light source (32) comprises a second light source housing (321) and a second light-emitting device. One end of the second light source housing (321) is connected to the first light source (31), and the other end face is in a circular ring shape. The second light-emitting device is mounted on the circular ring end face of the second light source housing (321), and the product is located in the irradiation direction of the second light-emitting device.

10. A product visual inspection device according to claim 7, characterized in that: The extension direction of the plurality of straight slots on the first light source mounting plate (33) and the second light source mounting plate (34) is parallel to the first direction or the moving direction of the screw slide (1).

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