Visual identification assembly for extracting characteristic parameters of impeller

Abstract

The utility model discloses a visual identification assembly for extracting characteristic parameters of an impeller, which comprises a transparent glass turntable arranged in a rotating manner, and an impeller side profile projection size detector for detecting the projection size of the side profile of the impeller positioned on the transparent glass turntable, the impeller side surface contour projection shape and size data comprises impeller height and impeller outer diameter size data; the impeller side face contour projection size detector comprises an impeller side face projection background plate vertically arranged at the position, close to one side of the inner circumference, above the transparent glass rotating disc, and a first visual recognition camera arranged at the position, close to the upper portion, of the outer side of the transparent glass rotating disc and pointing to the impeller side face projection background plate in the horizontal direction. And the first annular illumination light source is arranged at the periphery of a lens of the first visual identification camera and faces the direction of the impeller side projection background plate. The impeller mixing prevention device is arranged on the device for preventing the impellers from mixing materials, and can prevent the impellers of different specifications from mixing materials under the production condition of multiple varieties.

Description

Technical Field

[0001] The utility model relates to the technical field of impeller production and manufacturing, and specifically to a device and method for preventing impeller mixing under multi-variety production conditions, and also to a visual identification component for extracting impeller characteristic parameters used in the device and method for preventing impeller mixing. Background Art

[0002] The impeller is the core rotor part of rotating machinery such as pumps, steam turbines, turbine generators and other mechanical equipment. Figure 9 The above is a typical impeller structure, which includes an impeller body and a number of blades arranged on the impeller body. The profile of the blades is usually a curved surface.

[0003] When manufacturing impellers under multi-variety production conditions, due to the large number of impeller specifications and relatively similar shapes, and the impellers with basically the same outer diameter may have different detailed dimensions and the number of blades, if impellers of different specifications with basically the same size and shape are mixed into the production of one specification, it will be difficult for the production staff to identify them, resulting in the impeller products being discovered only when they are packaged and shipped to the customer, which may cause greater reputation and economic losses to the impeller manufacturer. Utility Model Content

[0004] To address the above-mentioned issues, the present invention proposes a device and method for preventing impeller mixing under multi-variety production conditions, and also provides a visual recognition component for extracting impeller characteristic parameters used in the device and method for preventing impeller mixing, aiming to prevent mixing of impellers of different specifications under multi-variety production conditions. The specific technical solution is as follows:

[0005] A device for preventing impeller mixing under multi-variety production conditions, comprising a rotatable transparent glass turntable, a feeding belt conveyor docked at the feeding side of the transparent glass turntable, a discharging belt conveyor docked at the discharging side of the transparent glass turntable, an abnormal impeller belt conveyor docked next to the transparent glass turntable for receiving abnormal impellers, an impeller side profile projection size detector for detecting the side profile projection size of the impeller on the transparent glass turntable, a blade number and position distribution detector for detecting the number and distribution of blades on the front of the impeller on the transparent glass turntable, and a rejection cylinder for transferring abnormal impellers from the transparent glass turntable to the abnormal impeller belt conveyor; the impeller side profile projection size detector includes a vertically arranged impeller on the transparent glass turntable An impeller side projection background plate is located on the inner side of the turntable, and a first visual recognition camera is arranged on the upper outer side of the transparent glass turntable and points horizontally to the impeller side projection background plate; the blade quantity and position distribution detector includes an impeller front projection background plate that is arranged below the transparent glass turntable and faces upward, and a second visual recognition camera that is arranged above the transparent glass turntable and has its lens pointing downward to the impeller front projection background plate; the reject cylinder is fixedly arranged on the inner side of the upper part of the transparent glass turntable, and the piston rod of the reject cylinder points to the feed side position of the abnormal impeller belt conveyor; the impeller side profile projection size detector, the blade quantity and position distribution detector and the reject cylinder are arranged in sequence according to the moving direction of the impeller on the transparent glass turntable.

[0006] Preferably, the device for preventing impeller mixing under multi-variety production conditions of the present invention is also provided with an impeller back profile projection size detector for detecting the back profile projection size of the impeller located on the transparent glass turntable, the impeller back profile projection size detector includes an impeller back projection background plate arranged above the transparent glass turntable and facing downward, and a third visual recognition camera arranged below the transparent glass turntable with the lens pointing upward to the impeller back projection background plate; the impeller side profile projection size detector, the blade number and position distribution detector, the impeller back profile projection size detector and the rejection cylinder are arranged in sequence according to the moving direction of the impeller on the transparent glass turntable.

[0007] Preferably, a first annular lighting source is provided on the periphery of the lens of the first visual recognition camera, and the first annular lighting source projects the direction of the background plate toward the side of the impeller; a second annular lighting source is provided on the periphery of the lens of the second visual recognition camera, and the second annular lighting source projects the direction of the background plate toward the front of the impeller; a third annular lighting source is provided on the periphery of the lens of the third visual recognition camera, and the third annular lighting source projects the direction of the background plate toward the back of the impeller.

[0008] In the present invention, the impeller side projection background plate, the impeller front projection background plate and the impeller back projection background plate all include a glass panel, a backlight box arranged on the back side of the glass panel, and an LED white backlight source arranged in the backlight box.

[0009] In the present invention, the first annular lighting source, the second annular lighting source and the third annular lighting source are all LED annular lighting sources.

[0010] Preferably, the device for preventing impeller mixing under multi-variety production conditions of the present invention also includes a frame and a stepper motor arranged on the frame, a connecting disk is provided on the motor shaft of the stepper motor, and the transparent glass turntable is fixed on the connecting disk.

[0011] In the utility model, the impeller side projection background plate, the first visual recognition camera, the first annular lighting source, the impeller front projection background plate, the second visual recognition camera, the second annular lighting source, the impeller back projection background plate, the third visual recognition camera and the third annular lighting source are all fixed on the frame.

[0012] Preferably, the frame is respectively fixed with a first horizontal cantilever and a second horizontal cantilever extending to the inner side above the transparent glass turntable, the impeller side projection background plate is fixed at the cantilever end of the first horizontal cantilever, and the rejection cylinder is fixed at the cantilever end of the second horizontal cantilever.

[0013] In order to smoothly transfer the impeller from the feed belt conveyor to the transparent glass turntable, an impeller feed guide rod is provided at the feed side of the transparent glass turntable. The impeller feed guide rod horizontally and obliquely spans the upper part of the feed belt conveyor.

[0014] In the utility model, a feed side guide rod mounting frame is provided on one side of the feed belt conveyor, and one end of the impeller feed guide rod is provided on the feed side guide rod mounting frame.

[0015] Preferably, the impeller feed guide rod is rotatably arranged on the feed side guide rod mounting bracket via a hinge shaft and is fixed by a locking screw.

[0016] As a further improvement of the present invention, in order to improve the reliability of the impeller being transferred from the feed belt conveyor to the transparent glass turntable, a pair of transmission wheels are arranged for corresponding rotation at both ends of the impeller feed guide rod, and a transmission belt is arranged between the pair of transmission wheels. The outer side surface of the transmission belt is perpendicular to the horizontal conveying surface of the conveyor belt of the feed belt conveyor. The transmission wheel close to one end of the feed side guide rod mounting frame is driven to rotate by a driving motor, and the transmission wheel away from one end of the feed side guide rod mounting frame is freely rotatable and is arranged on a rotating seat at the end of the impeller feed guide rod.

[0017] Preferably, the rotating seat is a bearing seat with a built-in rolling bearing, and the transmission wheel is rotatably arranged on the rolling bearing of the bearing seat.

[0018] During the process of the impeller being transferred from the feed belt conveyor to the transparent glass turntable, the side surface of the impeller is in contact with the outer side surface of the transmission belt; when the transmission belt moves, the impeller abutting against the outer side surface of the transmission belt is smoothly transferred from the feed belt conveyor to the transparent glass turntable under the combined action of the conveying force of the feed belt conveyor and the auxiliary propulsion force of the transmission belt.

[0019] In order to smoothly transfer the qualified impeller from the transparent glass turntable to the discharge belt conveyor, an impeller discharge guide rod is provided at the discharge side of the transparent glass turntable, and the impeller discharge guide rod is horizontally and obliquely spanned at the upper position of the discharge belt conveyor.

[0020] In the utility model, a discharging side guide rod mounting frame is provided on one side of the discharging belt conveyor, and one end of the impeller discharging guide rod is provided on the discharging side guide rod mounting frame.

[0021] Preferably, the impeller discharge guide rod is rotatably arranged on the discharge side guide rod mounting bracket via a hinge shaft and is fixed by a locking screw.

[0022] As a further improvement, the utility model is a device for preventing impeller mixing under multi-variety production conditions, and is also provided with a positive and negative pressure composite cleaning device for maintaining the cleanliness of the surface of the transparent glass turntable. The positive and negative pressure composite cleaning device includes a dust removal box cover arranged at a composite cleaning position of the transparent glass turntable and covering the front and back sides of the transparent glass turntable, a negative pressure vacuum cleaner connected to the inner cavity of the dust removal box cover through a negative pressure dust suction pipeline, a wind knife arranged inside the dust removal box cover and its air outlet is close to the surface of the transparent glass turntable, and a compressed air source connected to the wind knife through a compressed air pipeline.

[0023] Preferably, the dust removal box cover is provided with a U-shaped opening which is directly connected to the closed inner cavity of the dust removal box cover, and the front and back sides of the transparent glass turntable enter into the U-shaped opening.

[0024] Preferably, the U-shaped opening of the dust removal box cover and the air outlet of the wind knife respectively form a clearance fit with the surface of the transparent glass turntable.

[0025] As a further improvement, the utility model is a device for preventing impeller mixing under multi-variety production conditions, which is also provided with a blade profile feature extractor for extracting blade profile feature data on the front side of the impeller; the blade profile feature extractor includes a linear guide rail assembly fixed on the frame and located above the transparent glass turntable, an angle motor movably arranged on the linear guide rail assembly, a dividing plate arranged on the motor shaft of the angle motor, and a ranging sensor array arranged on the dividing plate.

[0026] In the present invention, a moving seat and a linear driving device for driving the moving seat to move linearly are provided on the linear guide rail assembly, and the angle motor is installed on the moving seat.

[0027] Preferably, the impeller side profile projection size detector, blade number and position distribution detector, impeller back profile projection size detector, blade profile feature extractor and rejection cylinder are arranged in sequence according to the moving direction of the impeller on the transparent glass turntable.

[0028] Preferably, the ranging sensor array includes a number of infrared ranging sensors provided on the dividing plate and arranged in a circular array, and the ranging direction of the infrared ranging sensor points downward to the front of the impeller on the transparent glass turntable; the feed belt conveyor, the discharge belt conveyor, the abnormal impeller belt conveyor, the rejection cylinder, the first visual recognition camera, the second visual recognition camera, the third visual recognition camera, the stepping motor, the angle motor and the ranging sensor array are respectively connected to a control system, and the control system is respectively provided with a first visual recognition program module for identifying and extracting the shape and size data of the impeller side profile projection image, a second visual recognition program module for identifying and extracting the shape and size data of the impeller front profile projection image and the front blade number distribution data, and a third visual recognition program module for identifying and extracting the shape and size data of the impeller back profile projection image.

[0029] Preferably, the impeller side profile projection shape dimension data includes impeller height, impeller outer diameter, etc.

[0030] Preferably, the impeller back contour projection shape dimension data includes the impeller major diameter, impeller minor diameter, etc.

[0031] A method for preventing mixing of materials in an impeller under multi-variety production conditions comprises the following steps:

[0032] S1. Impeller conveying: The impeller is conveyed toward the transparent glass turntable through the feed belt conveyor until it reaches the feed side of the transparent glass turntable. Under the action of inertia, the impeller moves along the impeller feed guide rod at the joint of the feed belt conveyor and the transparent glass turntable and enters the transparent glass turntable.

[0033] S1. Impeller side profile projection size detection: The impeller moves with the rotating transparent glass turntable until it reaches the impeller side profile projection size detection position. The first visual recognition camera in the impeller side profile projection size detector obtains the side profile projection image of the impeller on the impeller side projection background plate. The first visual recognition program module recognizes and detects the size of the impeller side profile projection image. The control system determines whether the impeller is an abnormal impeller based on the size of the impeller side profile projection image.

[0034] S2. Blade quantity and position distribution detection: The impeller continues to move with the rotating transparent glass turntable until it reaches the blade quantity and position distribution detection position. The second visual recognition camera in the blade quantity and position distribution detector obtains a front projection image of the impeller on the impeller front projection background plate. The second visual recognition program module recognizes and detects the blade quantity and position distribution in the impeller front projection image. The control system determines whether the impeller is abnormal based on the blade quantity and position distribution.

[0035] S3. Impeller back profile projection size detection: The impeller continues to move with the rotating transparent glass turntable until it reaches the impeller back profile projection size detection position. The third visual recognition camera in the impeller back profile projection size detector obtains the impeller back profile projection image on the impeller back projection background plate. The third visual recognition program module recognizes and detects the size of the impeller back profile projection image. The control system determines whether the impeller is an abnormal impeller based on the size of the impeller back profile projection image.

[0036] S4. Transfer of qualified impellers and rejection of abnormal impellers: For the abnormal impeller detected in step S2 or step S3, when the abnormal impeller moves to the abnormal impeller rejection position with the rotating transparent glass turntable, the control system drives the rejection cylinder to move and push the abnormal impeller to the abnormal impeller belt conveyor, and the abnormal impeller is transported to the abnormal impeller collection frame through the abnormal impeller belt conveyor; the impeller that has not been rejected on the transparent glass turntable continues to move with the rotating transparent glass turntable until it reaches the discharge side position of the transparent glass turntable, and the impeller moves along the impeller discharge guide rod at the joint of the transparent glass turntable and the discharge belt conveyor under the action of inertia and enters the discharge belt conveyor; the impeller is transported to the impeller packaging station through the discharge belt conveyor for packaging.

[0037] As a further improvement of the present invention, the following steps are further provided between step S3 and step S4:

[0038] S3A, blade profile feature extraction: the impeller continues to move with the rotating transparent glass turntable until it reaches the blade profile feature extraction position; wherein, before the impeller reaches the blade profile feature extraction position, the control system drives the blade profile feature extractor in advance according to the blade quantity and position distribution data obtained in step S2, and moves the indexing plate on the motor shaft of the angle motor in the blade profile feature extractor in advance to the center of the blade profile feature extraction position through the linear guide assembly (the center is consistent with the impeller center to be reached, and the impeller center radius data is obtained by the control system). The system obtains the data obtained by online measurement of the number and position distribution detector of the blades according to the number and position distribution of the blades, and starts the angular motor to adjust the circumferential angle of the indexing plate on the motor shaft of the angular motor in advance, so that the circumferential distribution position of the distance sensor array on the indexing plate is compatible with the circumferential distribution position of the blades obtained in step S2; when the impeller reaches the blade profile feature extraction position, the distance sensor array on the indexing plate measures the vertical coordinate data of the corresponding blade profile on the impeller; the control system determines whether the impeller is an abnormal impeller based on the vertical coordinate data of the corresponding blade profile on the impeller measured by the distance sensor array.

[0039] Preferably, an error range can be pre-set for the impeller side profile projection image size data, the impeller back profile projection image size data and the vertical coordinate data of the corresponding blade profile on the impeller. The control system compares the measured impeller data to be measured with the standard impeller. When the data exceeds the pre-set error range, the impeller is judged as an abnormal impeller.

[0040] Preferably, during the rotation of the transparent glass turntable, the control system also activates the positive and negative pressure combined cleaning device to continuously perform positive and negative pressure combined cleaning on the front and back surfaces of the transparent glass turntable. During the positive and negative pressure combined cleaning, the air knife located in the dust removal box cover blows out compressed air to blow away dirt adhered to the surface of the transparent glass turntable and seal it within the cavity of the dust removal box cover. The negative pressure gas in the inner cavity of the dust removal box cover connected to the negative pressure dust suction pipeline sucks away the dirt. The sucked-away dirt is collected by the dust collector connected to the negative pressure dust suction pipeline through the negative pressure dust suction pipeline.

[0041] In the present utility model, the control system pre-stores data such as the size and shape of all impellers produced by the factory. The control system can also identify the specifications and models of abnormal impellers by comparing the data measured by the impeller side profile projection size detector, the blade number and position distribution detector, the impeller back profile projection size detector and the blade profile feature extractor with the stored data of the impeller.

[0042] The beneficial effects of the utility model are:

[0043] First, in the device and method for preventing impeller mixing under multi-variety production conditions of the utility model, a plurality of visual identification components for extracting impeller characteristic parameters are provided, which include an impeller side profile projection size detector, a blade number and position distribution detector and an impeller back profile projection size detector. It realizes impeller side profile projection size detection, blade number and position distribution detection and impeller back profile projection size detection through image recognition technology, and compares the detection data with the standard impeller to determine whether abnormal impellers are mixed in the produced impellers, and the entire detection and judgment process is automatically completed by the control system, and unqualified abnormal impellers can be automatically eliminated, and the degree of automation is good.

[0044] Second, in the device and method for preventing impeller mixing under multi-variety production conditions of the utility model, a blade profile feature extractor is provided, which can detect the profile coordinate dimensions of the impeller. It cooperates with the impeller side profile projection dimension detector, the blade number and position distribution detector and the impeller back profile projection dimension detector to detect each other, and can identify impellers of other specifications with extremely high similarity, thereby further improving the reliability of preventing impeller mixing under multi-variety production conditions.

[0045] Third, in the device and method for preventing impeller mixing under multi-variety production conditions of the utility model, an auxiliary transmission and cleaning component is also provided, which includes an auxiliary transmission component and a cleaning component; the auxiliary transmission component realizes the smooth transition and transportation of the impeller from the feed belt conveyor to the transparent glass turntable through the impeller feed guide rod set at the upper position of the feed side of the transparent glass turntable and horizontally obliquely across the upper position of the feed belt conveyor, and can ensure the circumferential radius position of the impeller after reaching the transparent glass turntable, so that the subsequent impeller detection can be more accurately and reliably entered into the lens range of the visual recognition camera, thereby improving the clarity of the impeller image capture; the auxiliary transmission component also realizes the transfer of the impeller from the transparent glass turntable to the discharge belt conveyor through the impeller discharge guide rod set at the upper position of the feed side of the transparent glass turntable and horizontally obliquely across the upper position of the discharge belt conveyor, thereby ensuring the smooth discharge of the impeller.

[0046] Fourth, in the device and method for preventing impeller mixing under multi-variety production conditions of the utility model, the auxiliary cleaning component adopts a positive and negative pressure composite cleaning device, which can perform online positive and negative pressure composite cleaning on the front and back sides of the transparent glass turntable, thereby improving the cleaning effect and ensuring the accuracy of the impeller image obtained by the visual recognition camera, thereby further improving the reliability of preventing impeller mixing under multi-variety production conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1This is a schematic diagram of the structure of a device for preventing impeller mixing under multi-variety production conditions of the utility model (a top view, which includes multiple visual recognition components for extracting impeller characteristic parameters);

[0048] Figure 2 yes Figure 1 Schematic diagram of the structure of the impeller side profile projection size detector part (side view);

[0049] Figure 3 yes Figure 1 Schematic diagram of the structure of the impeller back side projection size detector part (side view);

[0050] Figure 4 yes Figure 1 Schematic diagram of the structure of the detector part involving the number and position distribution of blades (side view);

[0051] Figure 5 yes Figure 1 Schematic diagram of the structure of the blade surface feature extractor part (side view);

[0052] Figure 6 yes Figure 1 A schematic diagram of the structure of the positive and negative pressure composite cleaning device (side view);

[0053] Figure 7 yes Figure 6 An enlarged schematic diagram of the positive and negative pressure composite cleaning device;

[0054] Figure 8 is Figure 1 A schematic diagram of the structure in which a transmission belt is arranged on the impeller feed guide rod;

[0055] Figure 9 It is a structural diagram of the impeller.

[0056] In the figure: 1. Transparent glass turntable, 2. Feed belt conveyor, 3. Discharge belt conveyor, 4. Abnormal impeller belt conveyor, 5. Impeller side profile projection size detector, 6. Blade number and position distribution detector, 7. Rejection cylinder, 8. Impeller side projection background plate, 9. First visual recognition camera, 10. Impeller front projection background plate, 11. Second visual recognition camera, 12. Impeller back profile projection size detector, 13. Impeller back projection background plate, 14. Third visual recognition camera, 15. First annular lighting source, 16. Second annular lighting source, 17. Third annular lighting source, 18. Frame, 19. Stepper motor, 20. Connecting plate, 21. First horizontal cantilever, 22. Second horizontal cantilever, 2 3. Impeller feed guide rod, 24. Impeller discharge guide rod, 25. Positive and negative pressure composite cleaning device, 26. Dust removal box cover, 27. Negative pressure dust suction pipeline, 28. Air knife, 29. Compressed air pipeline, 30. Blade profile feature extractor, 31. Linear guide rail assembly, 32. Angle motor, 33. Moving seat, 34. Indexing plate, 35. Distance sensor array, 36. Infrared distance sensor, 37. Impeller, 37.1. Blade, 38. U-shaped mouth, 39. Air knife fixing screw, 40. Feed side guide rod mounting bracket, 41. Hinge shaft, 42. Locking screw, 43. Drive wheel, 44. Drive belt, 45. Drive motor, 46. Rotating seat, 47. Horizontal conveying surface of conveyor belt, 48. Discharge side guide rod mounting bracket.

[0057] In the figure: A, impeller side profile projection size detection position, B, blade number and position distribution detection position, C, impeller back profile projection size detection position, D, blade surface feature extraction position, E, composite cleaning position. DETAILED DESCRIPTION

[0058] The following embodiments are used to further describe the specific embodiments of the present invention in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Example 1:

[0059] like Figures 1 to 9The figure shows an embodiment of the device for preventing impeller mixing under multi-variety production conditions of the present invention, comprising a rotatably arranged transparent glass turntable 1, a feeding belt conveyor 2 docked at the feeding side position of the transparent glass turntable 1, a discharging belt conveyor 3 docked at the discharging side position of the transparent glass turntable 1, an abnormal impeller belt conveyor 4 docked next to the transparent glass turntable 1 for receiving abnormal impellers, an impeller side profile projection size detector 5 for detecting the side profile projection size of the impeller 37 located on the transparent glass turntable 1, a blade number and position distribution detector 6 for detecting the number and distribution of blades located on the front of the impeller on the transparent glass turntable 1, and a rejection cylinder 7 for transferring abnormal impellers from the transparent glass turntable 1 to the abnormal impeller belt conveyor 4; the impeller side profile projection size detector 5 includes a vertically arranged An impeller side projection background plate 8 is located above the transparent glass turntable 1 on the inner side, and a first visual recognition camera 9 is located above the outer side of the transparent glass turntable 1 and points horizontally to the impeller side projection background plate 8; the blade quantity and position distribution detector 6 includes an impeller front projection background plate 10 located below the transparent glass turntable 1 and facing upward, and a second visual recognition camera 11 located above the transparent glass turntable 1 and with its lens pointing downward to the impeller front projection background plate 10; the rejection cylinder 7 is fixedly located above the transparent glass turntable 1 on the inner side, and the piston rod of the rejection cylinder 7 points to the feed side position of the abnormal impeller belt conveyor 4; the impeller side profile projection size detector 5, the blade quantity and position distribution detector 6 and the rejection cylinder 7 are arranged in sequence according to the moving direction of the impeller 37 on the transparent glass turntable 1.

[0060] Preferably, the device for preventing impeller mixing under multi-variety production conditions in this embodiment is also provided with an impeller back profile projection size detector 12 for detecting the back profile projection size of the impeller 37 located on the transparent glass turntable 1, and the impeller back profile projection size detector 12 includes an impeller back projection background plate 13 arranged above the transparent glass turntable 1 and facing downward, and a third visual recognition camera 14 arranged below the transparent glass turntable 1 and with the lens pointing upward to the impeller back projection background plate 13; the impeller side profile projection size detector 5, the blade number and position distribution detector 6, the impeller back profile projection size detector 12 and the rejection cylinder 7 are arranged in sequence according to the moving direction of the impeller 37 on the transparent glass turntable 1.

[0061] Preferably, a first annular lighting source 15 is provided on the periphery of the lens of the first visual recognition camera 9, and the first annular lighting source 15 projects the background plate 8 toward the side of the impeller; a second annular lighting source 16 is provided on the periphery of the lens of the second visual recognition camera 11, and the second annular lighting source 16 projects the background plate 10 toward the front of the impeller; a third annular lighting source 17 is provided on the periphery of the lens of the third visual recognition camera 14, and the third annular lighting source 17 projects the background plate 13 toward the back of the impeller.

[0062] In this embodiment, the impeller side projection background plate 8, the impeller front projection background plate 10 and the impeller back projection background plate 13 all include a glass panel, a backlight box arranged on the back side of the glass panel, and an LED white backlight source arranged in the backlight box.

[0063] In this embodiment, the first annular lighting source 15 , the second annular lighting source 16 and the third annular lighting source 17 are all LED annular lighting sources.

[0064] Preferably, the device for preventing impeller mixing under multi-variety production conditions in this embodiment also includes a frame 18 (only partially shown, the same below) and a stepper motor 19 arranged on the frame 18, and a connecting disk 20 is provided on the motor shaft of the stepper motor 19, and the transparent glass turntable 1 is fixed on the connecting disk 20.

[0065] In this embodiment, the impeller side projection background plate 8, the first visual recognition camera 9, the first annular lighting source 15, the impeller front projection background plate 10, the second visual recognition camera 11, the second annular lighting source 16, the impeller back projection background plate 13, the third visual recognition camera 14 and the third annular lighting source 17 are all fixed on the frame 18.

[0066] Preferably, the frame 18 is respectively fixed with a first horizontal cantilever 21 and a second horizontal cantilever 22 extending to the inner side above the transparent glass turntable 1, the impeller side projection background plate 8 is fixedly set at the cantilever end of the first horizontal cantilever 21, and the rejection cylinder 7 is fixedly set at the cantilever end of the second horizontal cantilever 22.

[0067] In order to smoothly transfer the impeller 37 from the feed belt conveyor 2 to the transparent glass turntable 1, an impeller feed guide rod 23 is provided at the feed side of the transparent glass turntable. The impeller feed guide rod 23 is horizontally and obliquely spanned at an upper position of the feed belt conveyor 2.

[0068] In the present invention, a feed side guide rod mounting frame 40 is provided on one side of the feed belt conveyor 2 , and one end of the impeller feed guide rod 23 is provided on the feed side guide rod mounting frame 40 .

[0069] Preferably, the impeller feed guide rod 23 is rotatably arranged on the feed side guide rod mounting bracket 40 via a hinge shaft 41 and is fixed via a locking screw 42 .

[0070] As a further improvement of the present invention, in order to improve the reliability of the impeller 37 moving from the feed belt conveyor 2 to the transparent glass turntable 1, a pair of transmission wheels 43 are arranged for corresponding rotation at both ends of the impeller feed guide rod 23, and a transmission belt 44 is arranged between the pair of transmission wheels 43. The outer side surface of the transmission belt 44 is perpendicular to the horizontal conveying surface 47 of the conveyor belt of the feed belt conveyor 2. The transmission wheel 43 near one end of the feed side guide rod mounting bracket 40 is driven to rotate by a drive motor 45, and the transmission wheel 43 away from one end of the feed side guide rod mounting bracket 40 is freely rotatable and is arranged on the rotating seat 46 at the end of the impeller feed guide rod 23.

[0071] Preferably, the rotating seat 46 is a bearing seat with a built-in rolling bearing, and the transmission wheel 43 is rotatably arranged on the rolling bearing of the bearing seat.

[0072] During the process of the impeller 37 being transferred from the feed belt conveyor 2 to the transparent glass turntable 1, the side of the impeller 37 is in contact with the outer side of the transmission belt 44; when the transmission belt 44 moves, the impeller 37 abutting against the outer side of the transmission belt 44 is smoothly transferred from the feed belt conveyor 2 to the transparent glass turntable 1 by the combined action of the conveying force of the feed belt conveyor 2 and the auxiliary propulsion force of the transmission belt 44.

[0073] In order to smoothly transfer the qualified impeller 37 from the transparent glass turntable 1 to the discharge belt conveyor 3, an impeller discharge guide rod 24 is provided at the discharge side of the transparent glass turntable 1, and the impeller discharge guide rod 24 is horizontally and obliquely spanned at an upper position of the discharge belt conveyor 3.

[0074] In the present invention, a discharging side guide rod mounting frame 48 is provided on one side of the discharging belt conveyor 3 , and one end of the impeller discharging guide rod 24 is provided on the discharging side guide rod mounting frame 48 .

[0075] Preferably, the impeller discharge guide rod 24 is rotatably arranged on the discharge side guide rod mounting bracket 41 via a hinge shaft and is fixed by a locking screw (not shown in the figure, the structure is similar to the mounting structure of the impeller feed guide rod).

[0076] As a further improvement, a device for preventing impeller mixing under multi-variety production conditions in this embodiment is also provided with a positive and negative pressure composite cleaning device 25 for maintaining the cleanliness of the surface of the transparent glass turntable 1, and the positive and negative pressure composite cleaning device 25 includes a dust removal box cover 26 arranged at a composite cleaning position of the transparent glass turntable 1 and covering the front and back sides of the transparent glass turntable 1, a negative pressure vacuum cleaner connected to the inner cavity of the dust removal box cover 26 through a negative pressure dust suction pipeline 27, a wind knife 28 arranged inside the dust removal box cover 26 and its air outlet is close to the surface of the transparent glass turntable 1, and a compressed air source connected to the wind knife 228 through a compressed air pipeline 29.

[0077] Preferably, a U-shaped opening 38 is provided on the dust removal box cover 26 , which is directly connected to the closed inner cavity of the dust removal box cover 26 , and the front and back sides of the transparent glass turntable 1 enter the U-shaped opening 38 .

[0078] Preferably, the U-shaped opening 38 of the dust removal box cover 26 and the air outlet of the wind knife 28 respectively form a clearance fit with the surface of the transparent glass turntable 1 .

[0079] As a further improvement, the device for preventing impeller mixing under multi-variety production conditions in this embodiment is also provided with a blade profile feature extractor 30 for extracting blade profile feature data on the front side of the impeller; the blade profile feature extractor 30 includes a linear guide rail assembly 31 fixed on the frame 18 and located above the transparent glass turntable 1, an angle motor 32 movably arranged on the linear guide rail assembly 31, a dividing plate 34 arranged on the motor shaft of the angle motor 32, and a ranging sensor array 35 arranged on the dividing plate 34.

[0080] In this embodiment, a moving seat 33 and a linear driving device for driving the moving seat 33 to move linearly are provided on the linear guide assembly 31 , and the angle motor 32 is installed on the moving seat 33 .

[0081] Preferably, the impeller side profile projection size detector 5, the blade number and position distribution detector 6, the impeller back profile projection size detector 12, the blade profile feature extractor 30 and the rejection cylinder 7 are arranged in sequence according to the moving direction of the impeller 37 on the transparent glass turntable 1.

[0082] Preferably, the ranging sensor array 35 includes a number of infrared ranging sensors 36 provided on the dividing plate 34 and arranged in a circular array, and the ranging direction of the infrared ranging sensor 36 points downward to the front of the impeller 37 on the transparent glass turntable 1; the feeding belt conveyor 2, the discharging belt conveyor 3, the abnormal impeller belt conveyor 4, the rejection cylinder 7, the first visual recognition camera 9, the second visual recognition camera 11, the third visual recognition camera 14, the stepping motor 19, the angle motor 32 and the ranging sensor array 35 are respectively connected to a control system, and the control system is respectively provided with a first visual recognition program module for identifying and extracting the shape and size data of the impeller side profile projection image, a second visual recognition program module for identifying and extracting the shape and size data of the impeller front profile projection image and the front blade number distribution data, and a third visual recognition program module for identifying and extracting the shape and size data of the impeller back profile projection image.

[0083] Preferably, the impeller side profile projection shape dimension data includes the height of the impeller 37, the outer diameter of the impeller 37, etc.

[0084] Preferably, the impeller back contour projection shape dimension data includes the major diameter of the impeller 37, the minor diameter of the impeller 37, etc. Example 2:

[0085] A method for preventing mixing of materials in an impeller under multi-variety production conditions comprises the following steps:

[0086] S1. Impeller conveying: The impeller 37 is conveyed toward the transparent glass turntable 1 by the feed belt conveyor 2 until it reaches the feed side of the transparent glass turntable 1. Under the action of inertial movement, the impeller 37 moves along the impeller feed guide rod 23 at the joint of the feed belt conveyor 2 and the transparent glass turntable 1 and enters the transparent glass turntable 1;

[0087] S1. Impeller side profile projection size detection: The impeller 37 moves along with the rotating transparent glass turntable 1 until it reaches the impeller side profile projection size detection position. The first visual recognition camera 9 in the impeller side profile projection size detector 5 captures the side profile projection image of the impeller 37 on the impeller side projection background plate 8. The first visual recognition program module recognizes and detects the size of the impeller side profile projection image. The control system determines whether the impeller 37 is an abnormal impeller based on the size of the impeller side profile projection image.

[0088] S2. Blade quantity and position distribution detection: The impeller 37 continues to move with the rotating transparent glass turntable 1 until it reaches the blade quantity and position distribution detection position. The second visual recognition camera 11 in the blade quantity and position distribution detector 6 obtains a front projection image of the impeller 37 on the impeller front projection background plate 10. The second visual recognition program module recognizes and detects the blade quantity and position distribution in the impeller front projection image. The control system determines whether the impeller 37 is an abnormal impeller based on the blade quantity and position distribution.

[0089] S3. Impeller back profile projection size detection: The impeller 37 continues to move with the rotating transparent glass turntable 1 until it reaches the impeller back profile projection size detection position. The third visual recognition camera 14 in the impeller back profile projection size detector 12 obtains the back profile projection image of the impeller 37 on the impeller back projection background plate 13. The third visual recognition program module recognizes and detects the size of the impeller back profile projection image. The control system determines whether the impeller 37 is an abnormal impeller based on the size of the impeller back profile projection image.

[0090] S4. Transfer of qualified impellers and rejection of abnormal impellers: For the abnormal impeller detected in step S2 or step S3, when the abnormal impeller moves to the abnormal impeller rejection position with the rotating transparent glass turntable 1, the control system drives the rejection cylinder 7 to operate, and pushes the abnormal impeller to the abnormal impeller belt conveyor 4, and the abnormal impeller is transported to the abnormal impeller collection frame through the abnormal impeller belt conveyor 4; the impeller 37 that has not been rejected on the transparent glass turntable 1 continues to move with the rotating transparent glass turntable 1 until it reaches the discharge side position of the transparent glass turntable 1, and the impeller enters the discharge belt conveyor 3 along the impeller discharge guide rod 24 at the joint between the transparent glass turntable 1 and the discharge belt conveyor 3 under the action of inertia; the impeller 37 is transported to the impeller packaging station through the discharge belt conveyor 3 for packaging.

[0091] As a further improvement of this embodiment, the following steps are further provided between step S3 and step S4:

[0092] S3A, blade profile feature extraction: the impeller 37 continues to move with the rotating transparent glass turntable 1 until it reaches the blade profile feature extraction position; wherein, before the impeller reaches the blade profile feature extraction position, the control system drives the blade profile feature extractor 30 in advance based on the blade quantity and position distribution data obtained in step S2, and moves the indexing plate 34 on the motor shaft of the angle motor 32 in the blade profile feature extractor 30 in advance to the center of the blade profile feature extraction position through the linear guide assembly 31 (the center is consistent with the center of the impeller 37 that is about to arrive, and the center radius data of the impeller 37 is obtained by the control system based on the blade The blade quantity and position distribution detector 6 is measured online), and the angular motor 32 is turned on to adjust the circumferential angle of the indexing plate 34 on the motor shaft of the angular motor 32 in advance, so that the circumferential distribution position of the distance sensor array 35 on the indexing plate 34 is adapted to the circumferential distribution position of the blades obtained in step S2; when the impeller 37 reaches the blade profile feature extraction position, the distance sensor array 35 on the indexing plate 34 measures the vertical coordinate data of the corresponding blade profile on the impeller 37; the control system determines whether the impeller 37 is an abnormal impeller based on the vertical coordinate data of the corresponding blade profile on the impeller 37 measured by the distance sensor array 35.

[0093] Preferably, an error range can be pre-set for the impeller side profile projection image size data, the impeller back profile projection image size data and the vertical coordinate data of the corresponding blade profile on the impeller. The control system compares the measured impeller data to be measured with the standard impeller. When the pre-set error range is exceeded, the impeller 37 is determined to be an abnormal impeller.

[0094] Preferably, during the rotation of the transparent glass turntable 1, the control system also activates the positive and negative pressure combined cleaning device 25 to continuously perform positive and negative pressure combined cleaning on the front and back surfaces of the transparent glass turntable 1. During the positive and negative pressure combined cleaning, the air knife 28 located in the dust removal box cover 26 blows out compressed air to blow away dirt adhered to the surface of the transparent glass turntable 1 and seal it within the cavity of the dust removal box cover 26. The negative pressure gas in the cavity of the dust removal box cover 26 connected to the negative pressure dust suction pipeline 27 sucks away the dirt. The sucked-away dirt is collected by the dust collector connected to the negative pressure dust suction pipeline 27 through the negative pressure dust suction pipeline 27.

[0095] In this embodiment, the control system pre-stores data such as the size and shape of all impellers produced by the factory. The control system can also identify the specifications and models of abnormal impellers by comparing the data measured by the impeller side profile projection size detector 5, the blade number and position distribution detector 6, the impeller back profile projection size detector 12 and the blade profile feature extractor 30 with the stored data of the impeller 37.

[0096] The above is only a preferred embodiment 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 technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A visual recognition component for extracting characteristic parameters of an impeller, characterized in that: It includes a transparent glass turntable that is rotatably arranged, an impeller side profile projection size detector for detecting the side profile projection size of an impeller located on the transparent glass turntable, the impeller side profile projection shape size data including impeller height and impeller outer diameter size data; the impeller side profile projection size detector includes an impeller side projection background plate uprightly arranged above the transparent glass turntable at a position on the inner side, a first visual recognition camera arranged at an upper position on the outer side of the transparent glass turntable and pointing horizontally to the impeller side projection background plate, and a first annular lighting source arranged on the periphery of the lens of the first visual recognition camera, the first annular lighting source facing the direction of the impeller side projection background plate.

2. A visual identification component for extracting impeller characteristic parameters according to claim 1, characterized in that: It also includes a blade number and position distribution detector for detecting the number and distribution of blades on the front of the impeller on the transparent glass turntable, the blade number and position distribution detector includes an impeller front projection background plate arranged below the transparent glass turntable and facing upward, a second visual recognition camera arranged above the transparent glass turntable and with its lens pointing downward to the impeller front projection background plate, and a second annular lighting light source arranged outside the lens of the second visual recognition camera, the second annular lighting light source facing the direction of the impeller front projection background plate.

3. A visual identification component for extracting impeller characteristic parameters according to claim 1, characterized in that: It also includes an impeller back side contour projection size detector for detecting the back side contour projection size of the impeller located on the transparent glass turntable, and the impeller back side contour projection shape size data includes the impeller major diameter and impeller minor diameter size data; the impeller back side contour projection size detector includes an impeller back side projection background plate arranged above the transparent glass turntable and facing downward, a third visual recognition camera arranged below the transparent glass turntable and with the lens pointing upward to the impeller back side projection background plate, and a third annular lighting light source arranged at the periphery of the lens of the third visual recognition camera, and the third annular lighting light source is facing the direction of the impeller back side projection background plate.

4. The visual identification component for extracting impeller characteristic parameters according to any one of claims 1 to 3, characterized in that: The impeller side projection background plate, the impeller front projection background plate and the impeller back projection background plate all include a glass panel, a backlight box arranged on the back side of the glass panel, and an LED white backlight source arranged in the backlight box.

5. The visual identification component for extracting impeller characteristic parameters according to any one of claims 1 to 3, characterized in that: The first annular lighting source, the second annular lighting source and the third annular lighting source are all LED annular lighting sources.

6. The visual identification component for extracting impeller characteristic parameters according to any one of claims 1 to 3, characterized in that: The impeller side projection background plate, the first visual recognition camera, the first annular lighting source, the impeller front projection background plate, the second visual recognition camera, the second annular lighting source, the impeller back projection background plate, the third visual recognition camera and the third annular lighting source are all fixed on the frame.

7. The visual identification component for extracting impeller characteristic parameters according to claim 6, characterized in that: The frame is respectively fixed with a first horizontal cantilever and a second horizontal cantilever extending to the inner circumference side above the transparent glass turntable, and the impeller side projection background plate is fixedly arranged on the cantilever end of the first horizontal cantilever.

8. The visual recognition component for extracting impeller characteristic parameters according to claim 6, characterized in that: It also includes a blade profile feature extractor for extracting blade profile feature data on the front side of the impeller; the blade profile feature extractor includes a linear guide assembly fixed on the frame and located above the transparent glass turntable, an angular motor movably arranged on the linear guide assembly, a dividing plate arranged on the motor shaft of the angular motor, and a ranging sensor array arranged on the dividing plate; the ranging sensor array includes a number of infrared ranging sensors arranged on the dividing plate and arranged in a circular array, and the ranging direction of the infrared ranging sensor points downward to the front side of the impeller on the transparent glass turntable.

9. A visual recognition component for extracting impeller characteristic parameters according to claim 8, characterized in that: The linear guide rail assembly is provided with a moving seat and a linear driving device for driving the moving seat to move linearly, and the angle motor is installed on the moving seat.

10. The visual recognition component for extracting impeller characteristic parameters according to claim 6, characterized in that: A stepping motor is provided on the frame, a connecting disk is provided on the motor shaft of the stepping motor, and the transparent glass turntable is fixed on the connecting disk.

Images