Online bulk material detection device

Abstract

The invention discloses an online bulk material detection device. The device comprises a first conveying mechanism; the second conveying mechanism is adjacent to the first conveying mechanism, the conveying direction of the second conveying mechanism and the conveying direction of the first conveying mechanism are located in the same axis direction, and the horizontal position of the second conveying mechanism is lower than that of the first conveying mechanism; the conveying speed of the second conveying mechanism is different from that of the first conveying mechanism, so that the to-be-detected product on the first conveying mechanism rolls on the second conveying mechanism after falling to the second conveying mechanism; and the horizontal position of the imaging mechanism is higher than that of the second conveying mechanism. According to the bulk product imaging device, different surfaces of bulk products can be subjected to image shooting, and the imaging mechanism is arranged on the upper side of the conveying mechanism, so that the influence of sundries on the image quality is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and further to an online bulk material detection device. Background Art

[0002] At present, the use of belt conveyors in the field of online detection can achieve high-speed real-time online detection, and multiple spectra such as visible light, near infrared, and short-wave infrared can be used to detect industrial products such as food. These spectra have the following advantages: visible light uses the principle of optical reflection on the surface of the object to be inspected to detect appearance defects or flaws on the surface of the object to be inspected; short-wave infrared uses the principle that different components of the object to be inspected have different thermal radiation within the short-wave infrared band, and can realize component analysis near the surface of the object.

[0003] In current industrial applications, since the objects to be inspected are conveyed by belts, visible light and short-wave infrared can only detect the surface of the objects to be inspected, but not the contact surface between the objects and the belts. Some existing technologies use two-stage conveyors, and a second viewing angle is installed below the two stages of the conveyors. However, debris is easily accumulated on the camera on the lower side, affecting the image quality, and the process of debris falling will also affect the image quality, especially for some bulk products with water or debris.

[0004] Therefore, it is necessary to design an online bulk material detection device to solve the above problems. Summary of the invention

[0005] In view of the above technical problems, the purpose of the present invention is to provide an online bulk material detection device that can capture images of different surfaces of bulk material products, and arrange the imaging mechanism on the upper side of the conveying mechanism to avoid the influence of debris on the image quality.

[0006] In order to achieve the above object, the present invention provides an online bulk material detection device, comprising:

[0007] A first conveying mechanism, used for conveying the product to be tested;

[0008] A second conveying mechanism is arranged adjacent to the first conveying mechanism, the conveying direction of the second conveying mechanism is in the same axial direction as the conveying direction of the first conveying mechanism, the horizontal position of the second conveying mechanism is lower than the horizontal position of the first conveying mechanism, and the conveying speed of the second conveying mechanism is different from the conveying speed of the first conveying mechanism, so that the product to be tested on the first conveying mechanism will roll on the second conveying mechanism after falling to the second conveying mechanism;

[0009] An imaging mechanism, wherein the horizontal position of the imaging mechanism is higher than the horizontal position of the second conveying mechanism, and the imaging mechanism is used to image a first surface of the product to be tested and a second surface opposite to the first surface.

[0010] In some embodiments, the first conveying mechanism includes a first conveying belt and a first motor connected to the first conveying belt, the first motor is used to drive the first conveying belt to move, and the product to be tested is placed above the first conveying belt.

[0011] In some embodiments, the second conveying mechanism includes a second conveying belt and a second motor connected to the second conveying belt, the second motor is used to drive the second conveying belt to move, and the product to be tested falls above the second conveying belt.

[0012] In some embodiments, the first conveying mechanism further includes a first adjusting member, the first adjusting member being connected to the first conveying belt of the first conveying mechanism and being used to adjust the horizontal position of the first conveying belt;

[0013] And / or, the conveying speed of the first conveying mechanism is adjustable;

[0014] And / or, the angle of the first conveying mechanism is adjustable;

[0015] And / or, the second conveying mechanism further comprises a second adjusting member, the second adjusting member being connected to the second conveying belt of the second conveying mechanism and being used for adjusting the horizontal position of the second conveying belt;

[0016] And / or, the conveying speed of the second conveying mechanism is adjustable.

[0017] In some embodiments, the imaging mechanism includes a first imaging portion and a second imaging portion, and the first imaging portion and the second imaging portion are arranged at a preset angle and are both arranged above the second conveying mechanism, so that the first imaging portion faces the entrance end of the second conveying mechanism and the second imaging portion faces the exit end of the second conveying mechanism.

[0018] In some embodiments, the first imaging unit includes at least one first camera, and the shooting angle of the first camera is adjustable;

[0019] The second imaging unit includes at least one second camera, and the shooting angle of the second camera is adjustable.

[0020] In some embodiments, the imaging mechanism further comprises:

[0021] An image processing unit is connected to the first imaging unit and the second imaging unit respectively, and is used to process the image taken by the first imaging unit and the image taken by the second imaging unit.

[0022] In some embodiments, the imaging mechanism further comprises:

[0023] A transparent baffle, the transparent baffle being disposed between the first imaging unit, the second imaging unit and the second conveying mechanism, the transparent baffle being used to protect the camera lens of the first imaging unit and the camera lens of the second imaging unit;

[0024] A light source is disposed on the transparent baffle, and is used to provide fill light for shooting by the first imaging unit and the second imaging unit.

[0025] In some embodiments, the imaging mechanism further comprises:

[0026] The third imaging unit includes an X-ray source and an X-ray linear array detector, the X-ray source is located above the second conveying mechanism, the X-ray linear array detector is located below the second conveying mechanism, the X-ray source and the X-ray linear array detector are arranged correspondingly, and are used to perform X-ray transmission imaging of the product to be tested.

[0027] In some embodiments, it further comprises:

[0028] The rejecting mechanism is arranged at one end of the second conveying mechanism away from the first conveying mechanism, and the rejecting mechanism is used to reject unqualified products.

[0029] Compared with the prior art, the online bulk material detection device provided by the present invention has the following beneficial effects:

[0030] In the present invention, by setting the first conveying mechanism and the second conveying mechanism to have a certain height difference and speed difference, when the product to be tested falls from the first conveying mechanism to the second conveying mechanism, there will be a certain tumbling, so that the imaging mechanism can photograph different surfaces of the product to be tested; the device cleverly causes the bulk material to roll itself, so that the first imaging part and the second imaging part, both of which are above the conveying mechanism, can photograph two surfaces of the bulk material close to the opposite side, thereby improving the detection rate of surface defects of the bulk material and avoiding the influence of debris on the image quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0032] Figure 1 is a simplified diagram of an online bulk material detection device according to a preferred embodiment of the present invention;

[0033] Figure 2 It is a schematic diagram of the three-dimensional structure of an online bulk material detection device according to a preferred embodiment of the present invention;

[0034] Figure 3It is a front view of an online bulk material detection device according to a preferred embodiment of the present invention.

[0035] Description of Figure Numbers:

[0036] A first conveying mechanism 1 , a second conveying mechanism 2 , an imaging mechanism 3 , a first imaging unit 31 , a second imaging unit 32 , a third imaging unit 33 , an image processing unit 34 , a transparent baffle 35 , a light source 36 , a rejecting mechanism 4 , and a frame 5 . DETAILED DESCRIPTION

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0038] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0039] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0040] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0042] In one embodiment, the reference specification Figures 1 to 3The present invention provides an online bulk material detection device, comprising: a first conveying mechanism 1, a second conveying mechanism 2 and an imaging mechanism 3, wherein the first conveying mechanism 1 is used to convey the product to be tested; the second conveying mechanism 2 is arranged adjacent to the first conveying mechanism 1, the conveying direction of the second conveying mechanism 2 is in the same axial direction as the conveying direction of the first conveying mechanism 1, the horizontal position of the second conveying mechanism 2 is lower than the horizontal position of the first conveying mechanism 1, and the conveying speed of the second conveying mechanism 2 is different from the conveying speed of the first conveying mechanism 1, so that the product to be tested on the first conveying mechanism 1 will roll on the second conveying mechanism 2 after falling to the second conveying mechanism 2; the horizontal position of the imaging mechanism 3 is higher than the horizontal position of the second conveying mechanism 2, and the imaging mechanism 3 is used to image the first surface of the product to be tested and the second surface opposite to the first surface.

[0043] In this embodiment, by setting a certain height difference and speed difference between the first conveying mechanism 1 and the second conveying mechanism 2, the product to be tested will roll on the second conveying mechanism 2 after falling from the first conveying mechanism 1 to the second conveying mechanism 2, so that the imaging mechanism 3 can photograph different surfaces of the product to be tested; the device cleverly causes the bulk material to roll itself, so that the imaging mechanism 3 arranged above the conveying mechanism can photograph two surfaces of the bulk material that are close to the opposite side, thereby improving the detection rate of surface defects of the bulk material and avoiding the influence of debris on the image quality.

[0044] In one embodiment, the reference specification Figures 1 to 3 The online bulk material detection device further includes: a frame 5, the frame 5 has a conveying channel, a first conveying mechanism 1 and a second conveying mechanism 2 are arranged in the conveying channel and arranged along the length direction of the conveying channel. The first conveying mechanism 1 includes a first conveyor belt and a first motor connected to the first conveyor belt, the first motor is used to drive the first conveyor belt to move, and the product to be tested is placed above the first conveyor belt. The second conveying mechanism includes a second conveyor belt and a second motor connected to the second conveyor belt, the second motor is used to drive the second conveyor belt to move, and the product to be tested falls above the second conveyor belt.

[0045] Furthermore, the conveying speed of the first conveying mechanism 1 is adjustable, and the pitch angle of the first conveying mechanism 1 is also adjustable. The first conveying mechanism 1 also includes a first adjusting member, which is connected to the first conveyor belt of the first conveying mechanism 1 and is used to adjust the horizontal position of the first conveyor belt; the conveying speed of the second conveying mechanism 2 is adjustable, and the second conveying mechanism 2 also includes a second adjusting member, which is connected to the second conveyor belt of the second conveying mechanism 2 and is used to adjust the horizontal position of the second conveyor belt. The speed adjustment of the first conveying mechanism 1 and the second conveying mechanism 2 can be adjusted by adjusting the output size of the motor; and the horizontal position or pitch angle of the first conveying mechanism 1 and the second conveying mechanism 2 can be adjusted by using structures such as lifting screws and lifting motors. Of course, other structures or devices that can achieve the above-mentioned adjustment functions can also be used, which will not be elaborated here.

[0046] The first conveying mechanism 1 is arranged at the entrance end of the conveying channel. Its function is to connect with the front production line to accelerate the products to be tested to a higher speed level. The first conveying mechanism 1 is slightly higher than the second conveying mechanism 2, so that even smaller products to be tested can slide smoothly into the second conveying mechanism 2.

[0047] The second conveying mechanism 2 is located at the rear section of the first conveying mechanism 1. There is a certain speed difference between the second conveying mechanism 2 and the first conveying mechanism 1, and the second conveying mechanism 2 is shorter than the first conveying mechanism 1 by a certain height. The speed difference between the first conveying mechanism 1 and the second conveying mechanism 2 can cause the product to be tested to roll after falling into the second conveying mechanism 2. The second conveying mechanism 2 is shorter than the first conveying mechanism 1 by a certain height, which is used to ensure that smaller products to be tested can also slide onto the second conveying mechanism 2 without falling into the gap between the first conveying mechanism 1 and the second conveying mechanism 2, and can also cause the products to be tested to roll.

[0048] By setting the adjustment member to adjust the height of the first conveying mechanism 1 and the second conveying mechanism 2, the online bulk material detection device can detect products to be tested with different characteristics. For example, viscous bulk materials have poor rolling properties, and the rolling properties can be increased by increasing the height difference between the first conveying mechanism 1 and the second conveying mechanism 2; dry bulk materials have good rolling properties, and the rolling properties can be reduced by decreasing the height difference between the first conveying mechanism 1 and the second conveying mechanism 2. This device can cleverly cause the bulk material to roll itself, so that the imaging mechanism 3 set above the conveying mechanism can shoot two surfaces of the bulk material close to the opposite side, thereby improving the detection rate of surface defects of the bulk material and avoiding the influence of debris on the image quality.

[0049] It should be noted that the specific structures of the first conveying mechanism 1 and the second conveying mechanism 2 are described in accordance with the drawings in the specification. In actual use, other structures or devices can be selected according to actual needs as long as the above functions can be achieved. This is only for the purpose of better illustrating the present invention and should not constitute a limitation to the present invention.

[0050] In one embodiment, the reference specification Figures 1 to 3 The imaging mechanism 3 includes a first imaging portion 31 and a second imaging portion 32. The first imaging portion 31 and the second imaging portion 32 are arranged at a preset angle and are both arranged above the second conveying mechanism 2, so that the first imaging portion 31 faces the entrance end of the second conveying mechanism 2, and the second imaging portion 32 faces the exit end of the second conveying mechanism 2.

[0051] Among them, the first imaging unit 31 includes at least one first camera, such as the first camera is a visible light or short-wave infrared array camera, and the shooting angle of the first camera is adjustable; the second imaging unit 32 includes at least one second camera, such as the second camera is a visible light or short-wave infrared array camera, and the shooting angle of the second camera is adjustable.

[0052] Furthermore, the imaging mechanism 3 further includes: an image processing unit 34, which is connected to the first imaging unit 31 and the second imaging unit 32 respectively, and is used to process the image captured by the first imaging unit 31 and the image captured by the second imaging unit 32. The image processing unit 34 aggregates the two images of the first imaging unit 31 and the second imaging unit 32, and uses the image of the first imaging unit 31 to identify whether the appearance of the front upper side of the product to be tested is normal, and uses the image of the second imaging unit 32 to identify whether the appearance of the rear upper surface of the product to be tested is normal.

[0053] The first imaging unit 31 is located above the second conveying mechanism 2. The core of the first imaging unit 31 is a visible light or short-wave infrared linear array camera. The camera lens faces downward and is biased toward the entrance of the second conveying mechanism 2 to photograph the front upper surface of the product to be tested. The visible light or short-wave infrared image generated by the first imaging unit 31 is sent to the image processing unit 34 for subsequent processing.

[0054] The second imaging unit 32 is also located above the second conveying mechanism 2 but in front of the first imaging unit 31. The core of the second imaging unit 32 is a visible light or short-wave infrared line array camera. The camera lens faces downward and deviates toward the exit of the second conveying mechanism 2 to photograph the upper rear surface of the product to be tested. The visible light or short-wave infrared image generated by the second imaging unit 32 is sent to the image processing unit 34 for subsequent processing.

[0055] Since there is a certain height difference and speed difference between the first conveying mechanism 1 and the second conveying mechanism 2, the product to be tested will roll over to a certain extent, and there is an angle difference between the cameras; the speeds of the first conveying mechanism 1 and the second conveying mechanism 2 can be adjusted separately, and the angle of each camera can also be adjusted separately, so that although the second imaging unit 32 shoots the rear upper surface of the product to be tested, by adjusting the angle difference of the camera and the speed difference of the conveying mechanism to cause the product to be tested to roll, the second imaging unit 32 can actually shoot the back side of the surface shot by the first imaging unit 31, thereby achieving comprehensive shooting of the product to be tested.

[0056] In this embodiment, the first imaging part 31 and the second imaging part 32 have a certain angle difference when working, and combined with the height difference and speed difference between the first conveying mechanism 1 and the second conveying mechanism 2, by adjusting these three points, both sides of different types of bulk materials can be photographed; for example, viscous bulk materials have poor rolling properties, and the height of the first conveying mechanism 1 can be increased to increase the rolling properties; dry bulk materials have good rolling properties, and the height of the first conveying mechanism 1 can be lowered to reduce the rolling properties; the above structure cleverly causes the bulk materials to roll themselves, so that the two cameras above the second conveying mechanism 2 can photograph the two surfaces of the bulk materials that are close to the opposite sides, thereby improving the detection rate of surface defects of the bulk materials.

[0057] Furthermore, the imaging mechanism 3 further includes: a transparent baffle 35 and a light source 36. The transparent baffle 35 is disposed between the first imaging unit 31, the second imaging unit 32 and the second conveying mechanism 2. The transparent baffle 35 is used to protect the camera lens of the first imaging unit 31 and the camera lens of the second imaging unit 32 to avoid contamination by foreign matter. The light source 36 is disposed on the transparent baffle 35 or on the peripheral side of the transparent baffle 35. The light source 36 is used to fill in the light for the shooting of the first imaging unit 31 and the second imaging unit 32 to improve the image quality. The light source 36 can be a fill-in light or other device.

[0058] Furthermore, the imaging mechanism 3 also includes: a third imaging unit 33, the third imaging unit 33 includes an X-ray source and an X-ray linear array detector, the X-ray source is located above the second conveying mechanism 2, the X-ray linear array detector is located below the second conveying mechanism 2, the X-ray source and the X-ray linear array detector are arranged correspondingly, and are used to perform X-ray transmission imaging of the product to be tested. The third imaging unit 33 is connected to the image processing unit 34, and sends the generated X-ray image to the image processing unit 34 for imaging detection of internal foreign matter and defects of the product to be tested.

[0059] The third imaging unit 33 is arranged inside the frame 5. The inside of the frame 5 is divided into a metal area and a non-metal area. The third imaging unit 33 is arranged in the non-metal area to reduce the obstruction or absorption of X-rays by the metal area, thereby ensuring the quality of X-ray imaging and effectively improving the detection efficiency.

[0060] The metal area and the non-metal area are easy to understand. If there is metal material in this area, it is a metal area, and if there is no metal material, it is a non-metal area. Under normal circumstances, there can only be carbon fiber plates or other lightweight materials in the X-ray transmission direction to ensure the penetration performance of X-rays. Of course, in other embodiments, there are other implementation plans to achieve the guarantee of X-ray penetration performance, which will not be elaborated here.

[0061] For edge detection applications, the edge of some products (such as plastic packaging) is very thin and cannot be effectively imaged by X-rays. In this case, the visible light image of the first imaging unit 31 or the second imaging unit 32 is used to find the edge position, and then the X-ray image of the corresponding position is used to identify and detect whether there is material stuck in the edge.

[0062] Furthermore, the online bulk material detection device further includes: a rejection mechanism 4, which is arranged at one end of the second conveying mechanism 2 away from the first conveying mechanism 1, and is used to reject unqualified products.

[0063] Exemplarily, the rejection mechanism 4 includes a plurality of air nozzles, which are arranged above the conveying mechanism and facing the conveying mechanism, and are used to blow air to reject defective products in the products to be tested; the above-mentioned air nozzles can be evenly arranged along the conveying path of the products to be tested, and blow air to reject them in time after each test, thereby reducing the subsequent work pressure. Of course, the rejection mechanism 4 can also adopt other rejection methods.

[0064] By setting up air nozzles to blow air to remove defective products in the products to be tested, the entire testing line is made more automated. After the products to be tested are tested, they can be directly transported to the discharging area without manual sorting, saving labor costs.

[0065] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0066] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An online bulk material detection device, characterized in that: include: A first conveying mechanism, used for conveying the product to be tested; A second conveying mechanism is arranged adjacent to the first conveying mechanism, the conveying direction of the second conveying mechanism is in the same axial direction as the conveying direction of the first conveying mechanism, the horizontal position of the second conveying mechanism is lower than the horizontal position of the first conveying mechanism, and the conveying speed of the second conveying mechanism is different from the conveying speed of the first conveying mechanism, so that the product to be tested on the first conveying mechanism will roll on the second conveying mechanism after falling to the second conveying mechanism; An imaging mechanism, wherein the horizontal position of the imaging mechanism is higher than the horizontal position of the second conveying mechanism, and the imaging mechanism is used to image a first surface of the product to be tested and a second surface opposite to the first surface.

2. The online bulk material detection device according to claim 1, characterized in that: The first conveying mechanism includes a first conveying belt and a first motor connected to the first conveying belt, the first motor is used to drive the first conveying belt to move, and the product to be tested is placed above the first conveying belt.

3. The online bulk material detection device according to claim 1, characterized in that: The second conveying mechanism includes a second conveying belt and a second motor connected to the second conveying belt. The second motor is used to drive the second conveying belt to move, and the product to be tested falls onto the second conveying belt.

4. The online bulk material detection device according to claim 2 or 3, characterized in that: The first conveying mechanism further comprises a first adjusting member, the first adjusting member being connected to the first conveying belt of the first conveying mechanism and being used for adjusting the horizontal position of the first conveying belt; And / or, the conveying speed of the first conveying mechanism is adjustable; And / or, the angle of the first conveying mechanism is adjustable; And / or, the second conveying mechanism further comprises a second adjusting member, the second adjusting member being connected to the second conveying belt of the second conveying mechanism and being used for adjusting the horizontal position of the second conveying belt; And / or, the conveying speed of the second conveying mechanism is adjustable.

5. The online bulk material detection device according to claim 1, characterized in that: The imaging mechanism includes a first imaging part and a second imaging part, which are arranged at a preset angle and are both arranged above the second conveying mechanism, so that the first imaging part faces the entrance end of the second conveying mechanism and the second imaging part faces the exit end of the second conveying mechanism.

6. The online bulk material detection device according to claim 5, characterized in that: The first imaging unit includes at least one first camera, and the shooting angle of the first camera is adjustable; The second imaging unit includes at least one second camera, and the shooting angle of the second camera is adjustable.

7. The online bulk material detection device according to claim 5, characterized in that: The imaging mechanism also includes: An image processing unit is connected to the first imaging unit and the second imaging unit respectively, and is used to process the image taken by the first imaging unit and the image taken by the second imaging unit.

8. The online bulk material detection device according to claim 5, characterized in that: The imaging mechanism also includes: A transparent baffle, the transparent baffle being disposed between the first imaging unit, the second imaging unit and the second conveying mechanism, the transparent baffle being used to protect the camera lens of the first imaging unit and the camera lens of the second imaging unit; A light source is disposed on the transparent baffle, and is used to provide fill light for shooting by the first imaging unit and the second imaging unit.

9. The online bulk material detection device according to any one of claims 5 to 8, characterized in that: The imaging mechanism also includes: The third imaging unit includes an X-ray source and an X-ray linear array detector, the X-ray source is located above the second conveying mechanism, the X-ray linear array detector is located below the second conveying mechanism, the X-ray source and the X-ray linear array detector are arranged correspondingly, and are used to perform X-ray transmission imaging of the product to be tested.

10. The online bulk material detection device according to claim 1, characterized in that: Also includes: The rejecting mechanism is arranged at one end of the second conveying mechanism away from the first conveying mechanism, and the rejecting mechanism is used to reject unqualified products.

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