Intelligent screening device based on machine vision and chili screening system

Abstract

The application provides a kind of intelligent screening device based on machine vision and pepper screening system, belong to screening technical field. Including: feeding mechanism, vision mechanism, gas supply mechanism, nozzle and processor. Feeding mechanism is used to transport object material. Vision mechanism is used to obtain the image data of the object material transported by the feeding mechanism. Gas supply mechanism is communicated with nozzle, and nozzle is arranged at the feeding channel of feeding mechanism. Processor is used to determine whether the object material has defect according to image data. If the object material has defect, the processor controls the gas supply mechanism to supply gas to the nozzle, so as to blow out the object material with defect from the feeding channel of feeding mechanism by using nozzle. It can effectively improve the fine screening ability of the material with partial defect, and significantly improve the screening effect of the material.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of screening, in particular to an intelligent screening device based on machine vision and a pepper screening system. BACKGROUND

[0002] The existing screening device can complete the basic screening operation when screening the materials, but the recognition ability of the existing screening device for the materials with partial defects is insufficient, which leads to a certain number of defective parts remaining in the screened materials, and these defective parts still need to be further screened and removed. SUMMARY

[0003] The first object of the present application is to provide an intelligent screening device based on machine vision, which can effectively improve the fine screening ability for materials with partial defects and significantly improve the screening effect of the materials.

[0004] The second object of the present application is to provide a pepper screening system, which can effectively improve the fine screening ability for peppers with partial defects and significantly improve the screening effect of the peppers.

[0005] The embodiments of the present application are implemented as follows:

[0006] An intelligent screening device based on machine vision comprises a feeding mechanism, a vision mechanism, a gas supply mechanism, a nozzle and a processor.

[0007] The feeding mechanism is used to transport the object materials.

[0008] The vision mechanism is used to obtain image data of the object materials transported by the feeding mechanism.

[0009] The gas supply mechanism is in communication with the nozzle, and the nozzle is arranged at the feeding channel of the feeding mechanism.

[0010] The processor is used to determine whether the object materials have defects according to the image data. If the object materials have defects, the processor controls the gas supply mechanism to supply gas to the nozzle to blow the object materials with defects out of the feeding channel of the feeding mechanism by the nozzle.

[0011] Further, the feeding channel of the feeding mechanism is provided with an observation section, and the color of the observation section is different from the color of other positions of the feeding channel.

[0012] The vision mechanism is arranged corresponding to the observation section and is used to obtain image data of the object materials in the observation section.

[0013] The processor is used to determine the object materials located in the observation section according to the background color corresponding to the color of the observation section in the image data, and to determine whether the object materials located in the observation section have defects according to the image data.

[0014] Further, the nozzle comprises a tubular body, a rotating shaft, a control arm and an adjusting assembly.

[0015] The internal space of the tubular body is rectangular in cross section. The tubular body has oppositely arranged inner top and bottom walls, and oppositely arranged first and second inner side walls.

[0016] The inlet end of the tubular body is in communication with the gas supply mechanism.

[0017] The control arm is fixedly connected to the rotating shaft and is arranged along the radial direction of the rotating shaft, and the rotating shaft is rotatably installed in the internal space of the tubular body. The two ends of the rotating shaft are respectively matched with the inner top wall and the inner bottom wall, and the side wall of the rotating shaft is embedded in the first inner side wall or the second inner side wall.

[0018] The control arm is in contact with the inner top wall and the inner bottom wall at the same time.

[0019] The rotating shaft / control arm is in transmission cooperation with the adjusting assembly.

[0020] If the object material has a defect, the processor is further configured to determine the span of the object material with the defect in the length direction of the feeding channel according to the image data, and control the adjusting assembly to drive the rotating shaft / control arm, so that the flow-through width of the outlet end of the tubular body is adapted to the span.

[0021] Further, the end of the tubular body away from the outlet end is a closed structure, and the inlet of the tubular body is arranged on the side wall of the end away from the outlet end.

[0022] The adjusting assembly comprises a driver and a control rod.

[0023] The control rod is arranged inside the tubular body and along the length direction of the tubular body, and the control rod penetrates the end wall of the tubular body away from the outlet end. Along the length direction of the tubular body, the control rod is slidably matched with the tubular body, and the control rod and the end wall of the tubular body are in sliding seal. The control rod is driven by the driver.

[0024] The control arm is a hollow structure, and the side wall of the mouth of the control arm away from the outlet end of the tubular body is provided with an opening in communication with the internal space thereof.

[0025] A stop strip is fixedly arranged in the internal space of the control arm and is arranged along the length direction of the control arm.

[0026] The end of the control rod close to the control arm has an extension segment, and the extension segment extends into the control arm through the opening. The end of the extension segment is provided with a matching piece, and the matching piece is attached to the side of the stop strip away from the opening.

[0027] The rotating shaft is matched with a torsional spring, and in a natural state, the torsional spring drives the rotating shaft to rotate, so that the flow-through width of the outlet end of the tubular body reaches the maximum.

[0028] The processor is configured to control the driver to drive the control rod towards the inlet end of the tubular body, so that the fitting pushes the control arm to swing towards the side where the inlet end of the tubular body is located, thereby reducing the flow width of the outlet end of the tubular body to adapt to the span.

[0029] Further, the fitting is fixedly connected with a column body away from one side of the extension section, and the column body extends along the length direction of the extension section.

[0030] A fitting cavity is formed in the surface of the fitting away from the column body, and the fitting cavity extends along the length direction of the column body and extends into the column body.

[0031] A piston is slidingly fitted in the fitting cavity, and an elastic member is arranged between the inner end wall of the end of the fitting cavity away from the fitting and the piston, and one end of the piston away from the elastic member is fixedly connected with a plug rod, and the plug rod abuts against the stop bar.

[0032] An input pipe and an output pipe are arranged on the end wall of the column body away from the fitting and are in communication with the fitting cavity, and the input pipe and the output pipe are respectively provided with a one-way structure. The input pipe is used to communicate with the lubricant storage mechanism, and the outlet end of the output pipe is arranged corresponding to the contact position of the shaft and the tubular body.

[0033] The torsional force provided by the torsional spring is greater than the elastic force provided by the elastic member, so that in the natural state, the fitting is attached to the stop bar, and the plug rod is completely pushed into the fitting cavity.

[0034] Further, the two end faces of the shaft are coaxially fixedly connected with extension shafts, and the diameters of the extension shafts are smaller than the diameter of the shaft.

[0035] The inner top wall and the inner bottom wall are both provided with a fitting groove for cooperating with the extension shaft.

[0036] The shaft is provided with an axial hole extending through the end face of the extension shaft.

[0037] The end face of the extension shaft is provided with a first drainage groove, and the side face of the extension shaft is provided with a second drainage groove. The first drainage groove is arranged along the radial direction of the extension shaft, one end of the first drainage groove is in communication with the axial hole, and the other end is in communication with the second drainage groove.

[0038] The side wall of the shaft is provided with a filling pipe in communication with the axial hole, and the filling pipe is in communication with the output pipe.

[0039] Further, the end face of the shaft is also provided with an annular groove, and the annular groove is arranged around the extension shaft, and the second drainage grooves are all in communication with the annular groove.

[0040] The side surface of the shaft for abutting against the first inner side wall or the second inner side wall is provided with an axial groove, and the annular groove is in communication with the axial groove.

[0041] Further, the inner bottom wall of the outlet end of the tubular body is further provided with a sliding groove, the sliding groove is arranged along the width direction of the inner bottom wall, and the sliding groove is located on the side of the control arm away from the control rod.

[0042] A sliding block is slidably connected in the sliding groove, and the sliding block is fixedly connected with a partition plate, the partition plate is perpendicular to the inner bottom wall, and the partition plate is perpendicular to the sliding groove.

[0043] An auxiliary lens is mounted on the surface of the partition plate away from the central axis of the tubular body, and the auxiliary lens faces the observation section.

[0044] The partition plate is provided with a matching through hole, the matching through hole is arranged perpendicular to the sliding groove and the inner bottom wall, a sliding rod is slidably connected in the matching through hole, one end of the sliding rod close to the control arm extends to the end of the control arm away from the rotating shaft and is hinged to the outer surface of the control arm. The rotating axis of the sliding rod is parallel to the rotating axis of the rotating shaft. The distance between the two partition plates is the same as the flow width between the two control arms.

[0045] The processor is further configured to determine whether the nozzle is aligned with the defective object material according to the auxiliary lens. When the nozzle is aligned with the defective object material, the processor controls the gas supply mechanism to supply gas to the nozzle to blow the defective object material out of the feeding channel of the feeding mechanism by the nozzle.

[0046] A chili screening system comprises the intelligent screening device.

[0047] Further, the feeding mechanism is a vibrating disc.

[0048] The technical scheme of the embodiment of the present application has the following beneficial effects:

[0049] The intelligent screening device based on machine vision provided by the embodiment of the present application automatically judges whether the object material has defects through image data. If it is judged that the object material has defects, the processor controls the gas supply mechanism to supply gas to the nozzle to blow the defective object material out of the feeding channel of the feeding mechanism by the nozzle, so as to reject the defective object material.

[0050] Overall, the intelligent screening device based on machine vision provided by the embodiment of the present application can effectively improve the fine screening ability of the material with partial defects, and significantly improve the screening effect of the material.

[0051] The chili screening system provided by the embodiment of the present application can effectively improve the fine screening ability of the chili with partial defects, and significantly improve the screening effect of the chili. BRIEF DESCRIPTION OF DRAWINGS

[0052] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those of ordinary skill in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0053] Figure 1 The overall structure schematic diagram of the intelligent screening device based on machine vision provided by the embodiments of the present application is shown in the figure.

[0054] Figure 2 The structure schematic diagram of the nozzle is shown in the figure.

[0055] Figure 3 The structure schematic diagram of the nozzle from another perspective is shown in the figure.

[0056] Figure 4 The structure schematic diagram of the nozzle is shown in the figure (relative to Figure 2 The flow width is reduced.

[0057] Figure 5 The span schematic diagram is shown in the figure.

[0058] Figure 6 The structure schematic diagram of the control arm is shown in the figure.

[0059] Figure 7 The stop bar and the cooperating piece cooperation schematic diagram (when the cooperating piece is attached to the stop bar) is shown in the figure.

[0060] Figure 8 The stop bar and the cooperating piece cooperation schematic diagram (when the cooperating piece is separated from the stop bar) is shown in the figure.

[0061] Figure 9 The rotation shaft and the extension shaft cooperation schematic diagram is shown in the figure.

[0062] Figure 10 The schematic diagram when the auxiliary lens is set is shown in the figure.

[0063] Figure 11 The Figure 10 The enlarged view of the A area in the figure is shown in the figure.

[0064] Explanation of reference signs:

[0065] Feed mechanism 100; observation section 110; nozzle 200; tubular body 210; inner top wall 211; inner bottom wall 212; first inner side wall 213; second inner side wall 214; chute 220; sliding block 230; partition 240; auxiliary lens 250; sliding rod 260; rotating shaft 300; axial hole 310; filling pipe 320; annular groove 330; axial groove 340; extension shaft 400; first drainage groove 410; second drainage groove 420; control arm 500; opening 510; stop bar 520; control rod 600; extension section 610; matching part 620; cylinder 630; matching cavity 640; expanded section 641; reduced section 642; piston 643; elastic part 644; plug rod 645; stop block 646; input pipe 650; output pipe 660; span L. DETAILED DESCRIPTION

[0066] In order to make the objects, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0067] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0068] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0069] The terms "first", "second", and the like are only used for differentiation description, and cannot be understood as indicating or implying relative importance.

[0070] In addition, the terms "vertical", "parallel", and the like do not mean that the components are absolutely vertical or parallel, but can be slightly inclined.

[0071] In the description of the present application, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0072] The technical solutions of the present application will be illustrated by some embodiments.

[0073] Referring to Figure 1 The embodiment of the present application provides an intelligent screening device based on machine vision, which comprises a feeding mechanism 100, a vision mechanism (not shown in the figure), a gas supply mechanism (not shown in the figure), a nozzle 200 and a processor (not shown in the figure).

[0074] The feeding mechanism 100 is used for conveying object materials.

[0075] The vision mechanism is used for acquiring image data of the object materials conveyed by the feeding mechanism 100.

[0076] The gas supply mechanism is in communication with the nozzle 200, and is used for supplying compressed air to the nozzle 200.

[0077] The nozzle 200 is arranged at a feeding channel of the feeding mechanism 100.

[0078] The processor is used for judging whether the object materials have defects according to the image data.

[0079] The processor can use a machine learning model to identify the defective materials, and is not limited thereto. Optionally, the model can be trained by using pictures of qualified materials (materials without defects), and after the training is completed, the model is used to automatically judge whether the object materials have defects according to the image data. The automatic identification by using the machine learning model belongs to the prior art, and will not be described herein.

[0080] If it is judged that the object materials have defects, the processor controls the gas supply mechanism to supply air to the nozzle 200, so as to blow the object materials with defects out of the feeding channel of the feeding mechanism 100 by using the nozzle 200, thereby rejecting the object materials with defects.

[0081] Overall, the intelligent screening device based on machine vision provided by the embodiment of the present application can effectively improve the fine screening ability of the materials with partial defects, and significantly improve the screening effect of the materials.

[0082] In the embodiment, in order to improve the accuracy when analyzing the image data, the feeding channel of the feeding mechanism 100 is provided with an observation section 110, and the color of the observation section 110 is different from the color of other positions of the feeding channel, including but not limited to: the observation section 110 is painted in a color different from other positions of the feeding channel.

[0083] The vision mechanism is arranged corresponding to the observation section 110, and is used for acquiring image data of the object materials in the observation section 110.

[0084] When the processor analyzes the image data, the image region of the observation section 110 is determined in the image data according to the color of the observation section 110, that is, the part with the background color of the observation section 110 in the image data is the image region of the observation section 110, that is, when the background color of the object material is the color of the observation section 110, it means that the object material is located in the observation section 110, and the processor only analyzes the object material entering the observation section 110 to determine whether it has defects.

[0085] Through the design, the object material can be avoided from being repeatedly identified accidentally, and the object material in other positions can be avoided from being identified, the identification accuracy is greatly improved, and the processing load of the processor is reduced.

[0086] Further, please refer to Figures 2-3 The nozzle 200 comprises a tubular body 210, a rotating shaft 300, a control arm 500 and an adjusting assembly.

[0087] The tubular body 210 is in a straight pipe shape, and the cross section of the internal space of the tubular body 210 is in a rectangle. The tubular body 210 has oppositely arranged inner top and bottom walls 211 and 212, and oppositely arranged first and second inner side walls 213 and 214. The inner top and bottom walls 211 and 212 are parallel and spaced apart, and the first and second inner side walls 213 and 214 are parallel and spaced apart.

[0088] The inlet end of the tubular body 210 is in communication with the gas supply mechanism, and the outlet end of the tubular body 210 is arranged close to and towards the observation section 110 of the feeding mechanism 100.

[0089] The control arm 500 is fixedly connected to the rotating shaft 300 and arranged along the radial direction of the rotating shaft 300, and the rotating shaft 300 is rotatably installed in the internal space of the tubular body 210.

[0090] The two ends of the rotating shaft 300 are matched with the inner top and bottom walls 211 and 212, respectively, and the rotating shaft 300 is arranged perpendicular to the inner top and bottom walls 211 and 212. The side wall of the rotating shaft 300 is embedded in the first or second inner side wall 213 or 214.

[0091] In this embodiment, the rotating shaft 300 is two, and the two rotating shafts 300 are arranged on the two sides of the tubular body 210. One of the rotating shafts 300 is matched with the first inner side wall 213, and the outer side wall part of the rotating shaft 300 is embedded in the first inner side wall 213. The other rotating shaft 300 is matched with the second inner side wall 214, and the outer side wall part of the rotating shaft 300 is embedded in the second inner side wall 214. The two rotating shafts 300 are located at the outlet end of the tubular body 210.

[0092] Each rotating shaft 300 corresponds to one control arm 500.

[0093] The control arms 500 are in contact with the inner top wall 211 and the inner bottom wall 212.

[0094] The rotation shaft 300 or the control arms 500 are in transmission with the adjusting assembly, which is used to drive the rotation shaft 300 and the control arms 500 to rotate, so as to change the flow width of the outlet end of the tubular body 210, as shown in the figure. Figure 4 Since the control arms 500 can limit the airflow in the tubular body 210, the airflow can only exit the tubular body 210 from the gap between the ends of the two control arms 500 at the outlet end of the tubular body 210, which limits the width of the airflow flow phase blowing to the object material.

[0095] In this embodiment, the visual mechanism can be a lens, and is not limited thereto. The orientation of the visual assembly can be perpendicular to the observation section 110.

[0096] If the object material has a defect, the processor is further configured to determine the span L of the object material with the defect in the length direction of the feeding channel according to the image data. In this application, the span L refers to the length of the area covered by the object material in the length direction of the feeding channel, as shown in the figure. Figure 5

[0097] When the object material with the defect is blown out of the feeding channel by the nozzle 200, the processor is further configured to control the adjusting assembly to drive the rotation shaft 300 and the control arms 500 to rotate, so that the flow width of the outlet end of the tubular body 210 is adapted to the span L of the object material with the defect, i.e., the gap between the ends of the two control arms 500 is adapted to the span L of the object material with the defect.

[0098] In this embodiment, the flow width of the outlet end of the tubular body 210 can be controlled to be equal to the span L of the object material with the defect, or the flow width of the outlet end of the tubular body 210 can be controlled to be smaller than the span L of the object material with the defect, for example, the flow width of the outlet end of the tubular body 210 is controlled to be between 70% and 100% of the span L of the object material with the defect, and is not limited thereto.

[0099] When the object material with the defect is blown out by the nozzle 200, the visual mechanism can also be used to determine whether the nozzle 200 is aligned with the object material with the defect. When the nozzle 200 is aligned with the object material with the defect, the processor controls the gas supply mechanism to supply gas, and the nozzle 200 can blow the object material with the defect out by the airflow.

[0100] By this design, the width of the airflow blown out by the nozzle 200 matches the span L of the object material with the defect, which facilitates the successful blowing out of the object material with the defect, avoids the blowing deviation of the object material with the defect due to the too narrow width of the airflow, and reduces the failure probability of blowing out.

[0101] ​In the present embodiment, please combine Figures 2-6 The tubular body 210 is closed at one end away from the outlet end thereof, and the inlet of the tubular body 210 is formed in the side wall of the one end away from the outlet end thereof.

[0102] The adjusting assembly comprises a driver (not shown in the figure) and a control rod 600.

[0103] The control rod 600 is arranged inside the tubular body 210 and along the length direction of the tubular body 210, and the control rod 600 is coaxially arranged with the tubular body 210 and penetrates the end wall of the one end of the tubular body 210 away from the outlet end thereof. Along the length direction of the tubular body 210, the control rod 600 is slidably fitted in the tubular body 210, and the control rod 600 is in sliding seal with the end wall of the tubular body 210. The one end of the control rod 600 outside the tubular body 210 is in transmission cooperation with the driver, and the control rod 600 is driven by the driver.

[0104] The control arm 500 is a hollow structure, and an opening 510 is formed in the side wall of one side of the mouth part of the control arm 500 away from the outlet end of the tubular body 210, which is in communication with the internal space thereof.

[0105] A stop strip 520 is fixedly arranged in the internal space of the control arm 500, and the stop strip 520 is arranged close to the opening 510 and extends along the length direction of the control arm 500.

[0106] The one end of the control rod 600 close to the control arm 500 has an extension segment 610, and one extension segment 610 is arranged corresponding to each control arm 500. The extension segment 610 extends into the control arm 500 through the opening 510.

[0107] The end part of the extension segment 610 is provided with a cooperating piece 620, and the cooperating piece 620 is attached to the side of the stop strip 520 away from the opening 510.

[0108] The rotating shaft 300 is matched with a torsional spring (not shown in the figure), and in the natural state, the torsional spring drives the rotating shaft 300 to rotate. For the control arm 500 located at the first inner side wall 213, the driving direction of the torsional spring is to drive the one side of the control arm 500 close to the mouth part of the outlet end of the tubular body 210 to rotate towards the first inner side wall 213. For the control arm 500 located at the second inner side wall 214, the driving direction of the torsional spring is to drive the one side of the control arm 500 close to the mouth part of the outlet end of the tubular body 210 to rotate towards the second inner side wall 214. That is, the torsional force provided by the torsional spring is used to drive the flow-through width of the outlet end of the tubular body 210 to reach the maximum.

[0109] In the present embodiment, the inner bottom wall 212 and the inner top wall 211 of the tubular body 210 are arranged parallel to the observation section 110.

[0110] The processor is configured to control the driver to drive the control rod 600 towards the inlet end of the tubular body 210, so that the fitting 620 pushes the control arm 500 to swing towards the side where the inlet end of the tubular body 210 is located by pushing the stop bar 520, so that the end portions of the control arms 500 on both sides are close to each other, and then the flow width of the outlet end of the tubular body 210 is reduced to adapt to the span L.

[0111] Further, please refer to Figures 7-8 The fitting 620 is fixedly connected with a column 630 away from one side of the extension section 610, and the column 630 is arranged along the length direction of the extension section 610.

[0112] The fitting 620 is fixedly connected with a column 630 away from one side of the extension section 610, and the column 630 is arranged along the length direction of the extension section 610.

[0113] The fitting 620 is fixedly connected with a column 630 away from one side of the extension section 610, and the column 630 is arranged along the length direction of the extension section 610.

[0114] In the embodiment, the fitting cavity 640 comprises a diameter expansion section 641 and a diameter reduction section 642 which are in communication. The diameter reduction section 642 is located away from one side of the diameter expansion section 641, and the diameter expansion section 641 extends to the mouth of the fitting cavity 640.

[0115] The elastic member 644 is located in the diameter reduction section 642, and the elastic member 644 is a spring.

[0116] The piston 643 is fitted in the diameter expansion section 641, and the outer diameter of the plug rod 645 is smaller than the inner diameter of the diameter expansion section 641. The diameter expansion section 641 is provided with a stop block 646 away from one end of the diameter reduction section 642, so as to prevent the piston 643 from being pulled out of the fitting cavity 640.

[0117] The column 630 is provided with an input pipe 650 and an output pipe 660 which are in communication with the fitting cavity 640 away from one end wall of the fitting 620, and the input pipe 650 and the output pipe 660 are respectively provided with a one-way structure (not shown in the figure). Due to the one-way structure, the input pipe 650 can only input lubricant into the fitting cavity 640, and the output pipe 660 can only output lubricant from the fitting cavity 640.

[0118] The input pipe 650 is configured to communicate with a lubricant storage mechanism (not shown in the figure), and the outlet end of the output pipe 660 is arranged at the contact position of the rotating shaft 300 and the tubular body 210, so as to coat the lubricant on the contact position of the rotating shaft 300 and the tubular body 210, so as to complete the lubrication.

[0119] Wherein, the torsion provided by the torsion spring is greater than the elastic force provided by the elastic member 644, so that in the natural state, the fitting member 620 is attached to the stop bar 520, and the plug rod 645 is fully pushed into the fitting cavity 640.

[0120] When the fitting member 620 is attached to the stop bar 520, the plug rod 645 is fully pushed into the fitting cavity 640, and in this state, the piston 643 is attached to the end wall of the expanded diameter section 641 close to the reduced diameter section 642, as shown in Figure 7 .

[0121] When the rotating shaft 300 is in the normal lubrication state, the rotating shaft 300 can rotate normally and smoothly. When the control rod 600 pulls the control arm 500 to reduce the flow-through width, or when the control rod 600 resets to reset the control arm 500 under the action of the torsion spring to increase the flow-through width, the rotating shaft 300 can rotate smoothly, and under the action of the torsion spring, the stop bar 520 always remains attached to the fitting member 620, the plug rod 645 always remains stable, and the piston 643 always attaches to the end wall of the expanded diameter section 641 close to the reduced diameter section 642. The lubricant cannot enter or exit the fitting cavity 640.

[0122] When the lubrication of the rotating shaft 300 is problematic, such as insufficient lubricant, the rotating shaft 300 is prone to jamming or being directly stuck during rotation. When the control rod 600 pulls the control arm 500 to reduce the flow-through width, the rotating shaft 300 can rotate even if the lubrication is poor because the control rod 600 can continuously provide pulling force. However, when the control rod 600 resets to reset the control arm 500 under the action of the torsion spring to increase the flow-through width, the control arm 500 can only reset under the action of the elastic force of the torsion spring, and when the lubrication is insufficient, the rotation speed of the control arm 500 when resetting is likely to be lower than that under normal lubrication. In this case, the speed of the control arm 500 rotation cannot keep up with the speed of the fitting member 620 movement, resulting in a gap between the fitting member 620 and the stop bar 520.

[0123] Once the gap appears, under the action of the elastic member 644, the piston 643 moves, and the plug rod 645 is pushed out until the end of the plug rod 645 is attached to the stop bar 520. During this process, the lubricant in the lubricant storage mechanism is sucked into the fitting cavity 640 through the input pipe 650, as shown in Figure 8 .

[0124] When the control arm 500 is finally completely reset smoothly under the action of the torsion spring, the stop bar 520 re-adjoins the matching part 620, and the stop bar 520 can push the plug rod 645 back into the matching cavity 640, so that the piston 643 re-adjoins the end wall of the expansion section 641 close to the reduced section 642, thereby outputting the lubricant in the matching cavity 640 to the contact position of the rotating shaft 300 and the tubular main body 210 through the output pipe 660 to complete the lubrication.

[0125] In this way, the replenishment of the lubricant can be automatically completed according to the actual lubrication condition, and the replenishment lubrication is realized.

[0126] When the control arm 500 is stuck during the resetting process due to poor lubrication, it is similar to the above case. Different from the above case, when the sticking occurs, the lubricant in the matching cavity 640 is only discharged when the control arm 500 is pulled by the control lever 600 next time.

[0127] In the embodiment, please refer to Figure 9 Both ends of the rotating shaft 300 are coaxially and fixedly connected with the extension shaft 400, and the diameter of the extension shaft 400 is smaller than that of the rotating shaft 300.

[0128] The inner top wall 211 and the inner bottom wall 212 are both provided with a matching groove for matching with the extension shaft 400. The extension shaft 400 is matched in the matching groove, one end surface of the rotating shaft 300 is in abutment with the inner top wall 211, and the other end surface of the rotating shaft 300 is in abutment with the inner bottom wall 212.

[0129] The rotating shaft 300 is internally provided with an axial hole 310 extending through the end surface of the extension shaft 400.

[0130] The end surface of the extension shaft 400 is provided with a first drainage groove 410, and the side surface of the extension shaft 400 is provided with a second drainage groove 420. The first drainage groove 410 is arranged along the radial direction of the extension shaft 400, one end of the first drainage groove 410 is in communication with the axial hole 310, and the other end is in communication with the second drainage groove 420.

[0131] The side wall of the rotating shaft 300 is provided with a filling pipe 320 in communication with the axial hole 310, and the filling pipe 320 is in communication with the output pipe 660.

[0132] The end surface of the rotating shaft 300 is also provided with an annular groove 330, and the annular groove 330 is annularly arranged on the extension shaft 400. The second drainage groove 420 is in communication with the annular groove 330.

[0133] The side surface of the rotating shaft 300 for abutting with the first inner side wall 213 or the second inner side wall 214 is provided with an axial groove 340, and the annular groove 330 is in communication with the axial groove 340.

[0134] Through the design, the lubricant in the matching cavity 640 enters the axial hole 310 through the filling pipe 320, and then sequentially flows through the first drainage groove 410, the second drainage groove 420, the annular groove 330 and the axial groove 340 to sufficiently lubricate the extension shaft 400 and the rotating shaft 300, thereby effectively improving the lubrication effect.

[0135] In the embodiment, a discharge pipe (not shown in the figure) for discharging excess lubricant is further arranged, one end of the discharge pipe is in communication with the axial groove 340, and the other end of the discharge pipe extends out of the tubular body 210.

[0136] The discharge pipe not only discharges excess lubricant, but also discharges impurities and metal scraps that may exist in the first drainage groove 410, the second drainage groove 420, the annular groove 330 and the axial groove 340.

[0137] Further, please refer to Figure 10 and Figure 11 In the embodiment, the inner bottom wall 212 of the outlet end of the tubular body 210 is further provided with a sliding groove 220, the sliding groove 220 is arranged along the width direction of the inner bottom wall 212, and the sliding groove 220 is located on the side of the control arm 500 away from the control rod 600.

[0138] A sliding block 230 is slidingly matched in the sliding groove 220, the sliding block 230 is fixedly connected with a partition plate 240, the partition plate 240 is arranged perpendicularly to the inner bottom wall 212, and the partition plate 240 is arranged perpendicularly to the sliding groove 220.

[0139] An auxiliary lens 250 is mounted on the side surface of the partition plate 240 away from the central axis of the tubular body 210, the auxiliary lens 250 is arranged towards the observation section 110, and the central axis of the auxiliary lens 250 is arranged parallel to the partition plate 240.

[0140] The partition plate 240 is provided with a matching through hole, the matching through hole is arranged perpendicularly to the sliding groove 220 and the inner bottom wall 212, and a sliding rod 260 is slidingly matched in the matching through hole, one end of the sliding rod 260 close to the control arm 500 extends to the end of the control arm 500 away from the rotating shaft 300 and is hinged to the outer surface of the control arm 500. The rotation axis of the sliding rod 260 relative to the control arm 500 is arranged parallel to the rotation axis of the rotating shaft 300.

[0141] Each control arm 500 is correspondingly provided with a sliding block 230, a partition plate 240, an auxiliary lens 250 and a sliding rod 260. The distance between the two partition plates 240 is the same as the flow-through width between the two control arms 500.

[0142] When the control arms 500 rotate, the sliding block 230 can be driven to slide along the sliding groove 220 by the sliding rod 260, and in this process, the sliding rod 260 slides along the matching through hole, and the spacing between the two partition plates 240 and the flow-through width between the two control arms 500 remain the same.

[0143] The processor is further configured to determine, according to the auxiliary lens 250, whether the nozzle 200 is aligned with the defective object material. Specifically, when it is determined by the vision mechanism that the nozzle 200 has been aligned with the defective object material, the auxiliary lens 250 can also be used to determine whether the defective object material can be observed. If the defective object material can be observed by both auxiliary lenses 250, it means that the nozzle 200 has indeed been aligned with the defective object material. It should be noted that this method is applicable when the flow-through width of the outlet end of the tubular body 210 is set to be smaller than the span L of the defective object material.

[0144] Through this design, it can be ensured that the nozzle 200 is aligned with the defective object material, and the defective object material is prevented from being blown off.

[0145] The application further provides a chili screening system, which comprises the intelligent screening device.

[0146] Optionally, the feeding mechanism 100 can be a vibrating disc. At this time, the inner bottom wall 212 of the tubular body 210 does not need to be strictly parallel to the observation section 110 of the vibrating disc, and the two can be roughly parallel.

[0147] In summary, the intelligent screening device based on machine vision provided by the embodiments of the application can effectively improve the fine screening capability of the defective object material, and significantly improve the screening effect of the object material. The chili screening system provided by the embodiments of the application can effectively improve the fine screening capability of the defective chili, and significantly improve the screening effect of the chili.

[0148] The above only describes the preferred embodiments of the application and is not intended to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A machine vision-based intelligent screening device, characterized in that, include: Feeding mechanism, vision mechanism, air supply mechanism, nozzles and processor; The feeding mechanism is used to transport the target material; The vision mechanism is used to acquire image data of the object material conveyed by the feeding mechanism; The air supply mechanism is connected to the nozzle, and the nozzle is located at the feeding channel of the feeding mechanism; The processor is used to determine whether the object material is damaged based on the image data; If the object material is damaged, the processor controls the air supply mechanism to supply air to the nozzle so that the damaged object material is blown out of the feeding channel of the feeding mechanism using the nozzle; The nozzle includes: a tubular body, a rotating shaft, a control arm, and an adjustment assembly; The internal space of the tubular body has a rectangular cross-section; the tubular body has an inner top wall and an inner bottom wall that are arranged opposite to each other, as well as a first inner side wall and a second inner side wall that are arranged opposite to each other; The inlet end of the tubular body is connected to the gas supply mechanism; The control arm is fixedly connected to the rotating shaft and arranged radially along the rotating shaft. The rotating shaft is rotatably installed in the internal space of the tubular body. The two ends of the rotating shaft are respectively fitted to the inner top wall and the inner bottom wall, and the side wall of the rotating shaft is embedded in the first inner side wall or the second inner side wall. The control arm is simultaneously in contact with both the inner top wall and the inner bottom wall; The rotating shaft / control arm is in transmission cooperation with the adjustment component; If the object material is defective, the processor is further configured to determine the span of the defective object material in the length direction of the feeding channel based on the image data, and control the adjustment component to drive the rotating shaft / control arm so that the flow width at the outlet end of the tubular body is adapted to the span; The end of the tubular body away from its outlet is a closed structure, and the inlet of the tubular body is opened on the side wall of the end away from its outlet. The adjustment assembly includes: a driver and a control lever; The control rod is disposed inside the tubular body and arranged along the length direction of the tubular body. The control rod passes through the end wall of the tubular body away from its outlet end. Along the length direction of the tubular body, the control rod is slidably fitted to the tubular body, and the control rod and the end wall of the tubular body are slidably sealed. The control rod is driven by the driver. The control arm has a hollow structure, and an opening communicating with its internal space is provided on the side wall of the outlet end of the control arm away from the tubular body. A stop bar is fixedly installed in the internal space of the control arm, and the stop bar extends along the length direction of the control arm; The control lever has an extension section at one end near the control arm, the extension section extending through the opening into the control arm; the end of the extension section is provided with a mating part, the mating part fitting against the side of the stop strip away from the opening; The rotating shaft is equipped with a torsion spring. In its natural state, the torsion spring drives the rotating shaft to rotate so that the flow width at the outlet end of the tubular body reaches its maximum. The processor controls the driver to drive the control lever toward the inlet end of the tubular body, so that the mating component pushes the control arm to swing toward the side where the inlet end of the tubular body is located, thereby reducing the flow width at the outlet end of the tubular body to match the span; A column is fixedly connected to the side of the mating component away from the extension section, and the column extends along the length direction of the extension section. The mating component has a mating cavity on the side surface away from the column, and the mating cavity extends along the length direction of the column and into the column. A piston is slidably fitted inside the mating cavity. An elastic element abuts against the piston at the inner end wall of the mating cavity away from the mating member. A stop rod is fixedly connected to the piston at the end away from the elastic element, and the stop rod abuts against the stop bar. The end wall of the column away from the mating component is provided with an input pipe and an output pipe that communicate with the mating cavity. Both the input pipe and the output pipe are configured with a unidirectional structure. The input pipe is used to communicate with the lubricant storage mechanism, and the outlet end of the output pipe is provided at the contact part between the rotating shaft and the tubular body. The torsion spring provides a greater torque than the elastic element provides a spring force, so that in its natural state, the mating element fits against the stop bar, and the plug rod is fully pushed into the mating cavity.

2. The intelligent screening device based on machine vision according to claim 1, characterized in that, The feeding channel of the feeding mechanism is provided with an observation section, the color of which is different from the color of other parts of the feeding channel; The vision mechanism is set up corresponding to the observation segment and is used to acquire the image data of the object material in the observation segment; The processor is used to determine the object material located in the observation segment based on the background color corresponding to the color of the observation segment in the image data, and to determine whether the object material located in the observation segment is damaged based on the image data.

3. The intelligent screening device based on machine vision according to claim 1, characterized in that, Both ends of the rotating shaft are coaxially fixedly connected to an extension shaft, the diameter of which is smaller than that of the rotating shaft. Both the inner top wall and the inner bottom wall are provided with mating grooves for engaging with the extension shaft; The rotating shaft has an axial hole inside, which extends through to the end face of the extension shaft. The end face of the extension shaft is provided with a first drainage groove, and the side face of the extension shaft is provided with a second drainage groove; the first drainage groove is arranged radially along the extension shaft, one end of the first drainage groove is connected to the axial hole, and the other end is connected to the second drainage groove. The side wall of the rotating shaft is provided with a filling pipe that communicates with the axial hole, and the filling pipe is connected to the output pipe.

4. The intelligent screening device based on machine vision according to claim 3, characterized in that, The end face of the rotating shaft is also provided with an annular groove, which is arranged around the extension shaft, and the second drainage groove is connected to the annular groove. The rotating shaft has an axial groove on one side surface that is in contact with the first inner sidewall or the second inner sidewall, and the annular groove is connected to the axial groove.

5. The intelligent screening device based on machine vision according to claim 2, characterized in that, The inner bottom wall at the outlet end of the tubular body is also provided with a sliding groove, which is arranged along the width direction of the inner bottom wall and is located on the side of the control arm away from the control rod. A slider is slidably fitted inside the groove, and a partition is fixedly connected to the slider. The partition is perpendicular to the inner bottom wall and the groove. An auxiliary lens is mounted on the side surface of the partition away from the central axis of the tubular body, and the auxiliary lens is positioned towards the observation section; The partition plate has a through hole, which is perpendicular to both the slide groove and the inner bottom wall. A slide rod is slidably fitted in the through hole. The end of the slide rod near the control arm extends to the end of the control arm away from the rotating shaft and is hinged to the control arm. The distance between the two partition plates is the same as the flow width between the two control arms. The processor is further configured to determine, based on the auxiliary lens, whether the nozzle is aligned with the defective object material; when the nozzle is aligned with the defective object material, the processor controls the air supply mechanism to supply air to the nozzle so as to use the nozzle to blow the defective object material out of the feeding channel of the feeding mechanism.

6. A chili pepper screening system, characterized in that, include: The intelligent screening device as described in any one of claims 1-5.

7. The chili pepper screening system according to claim 6, characterized in that, The feeding mechanism is a vibrating disc.

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