Image acquisition device for three-dimensional reconstruction of surface morphology of fleece fabric

Abstract

The utility model discloses an image acquisition device for three-dimensional reconstruction of the surface morphology of a fleece fabric, which comprises a supporting frame, a feeding port and a discharging port are respectively and correspondingly arranged on two corresponding side surfaces of the supporting frame, a conveying mechanism is arranged in the supporting frame and between the feeding port and the discharging port, the conveying mechanism is connected with a driving mechanism, and the driving mechanism is connected with the supporting frame. A laser is arranged in the side, provided with the feeding port, of the supporting frame and located above the conveying mechanism, a light supply unit is further arranged on the supporting frame and located above the conveying mechanism, and an image collecting unit is further arranged on the supporting frame and located over the conveying mechanism. The fleece fabric is horizontally conveyed from the feeding opening to the discharging opening through the conveying mechanism in the supporting frame, and the driving mechanism is connected with a control unit through a wire. According to the utility model, the problem that a direct shooting camera in the prior art can only acquire images of the fleece fabric from a fixed angle and cannot acquire deep information of the fleece fabric is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical imaging devices and relates to an image acquisition device for three-dimensional reconstruction of the surface morphology of fleece fabrics. Background Art

[0002] Fleece fabrics are widely used and come in many varieties. They are widely sold in military and civilian applications. However, there are certain quality problems in the process of fleece fabrics, which will affect comfort to a certain extent, thereby affecting the quality of textile products. At present, the quality inspection of fleece fabrics is gradually developing in the direction of digitization to meet the needs of high-speed, non-contact and reproducible quality inspection. The quality of sample collection is directly related to the effect of post-image processing and the accuracy of three-dimensional reconstruction. At present, digital imaging devices such as industrial cameras, digital cameras, and scanners are often used for image acquisition to directly shoot the surface of the target object. Direct shooting is limited by the viewing angle. The camera can only obtain the image of the fleece fabric from a fixed angle and cannot obtain the deep information of the fleece fabric. Some small and complex parts cannot be captured. In addition, the lighting conditions of the external environment will directly affect the quality of the image and affect the accuracy of the later three-dimensional reconstruction. Utility Model Content

[0003] The utility model aims to provide an image acquisition device for three-dimensional reconstruction of the surface morphology of fleece fabrics, which solves the problem in the prior art that direct shooting cameras can only obtain images of fleece fabrics from a fixed angle and cannot obtain deep information of the fleece fabrics.

[0004] The technical solution adopted by the utility model is an image acquisition device for three-dimensional reconstruction of the surface morphology of fleece fabrics, comprising a support frame, a loading port and a unloading port are respectively arranged on corresponding side surfaces of the support frame, a conveying mechanism is arranged between the loading port and the unloading port in the support frame, the conveying mechanism is connected to a driving mechanism, a laser is arranged above the conveying mechanism inside one side of the support frame where the loading port is arranged, a light supply unit is also arranged above the conveying mechanism on the support frame, an image acquisition unit is also arranged directly above the conveying mechanism on the support frame, the fleece fabric is horizontally transported from the loading port to the unloading port via the conveying mechanism in the support frame, and the driving mechanism is connected to a control unit via a wire.

[0005] The utility model is also characterized in that:

[0006] The laser line emitted by the laser forms an angle of 30° with the surface of the fleece fabric; the optical axis of the image acquisition unit is perpendicular to the surface of the fleece fabric.

[0007] The transmission mechanism includes rotating shafts arranged in the support frame at the positions corresponding to the loading port and the unloading port, respectively, the rotating shafts are connected to the driving mechanism, rotating rollers are fixedly installed on the two rotating shafts, and a synchronous belt is commonly mounted on the two rotating rollers.

[0008] Deep groove ball bearings are connected at both ends of the rotating shaft, and the deep groove ball bearings are fixed at corresponding positions of the supporting frame through bearing seats.

[0009] The driving unit comprises a stepper motor fixedly connected to the supporting frame, the output end of the stepper motor is connected to any rotating shaft through a coupling, and the stepper motor is connected to the control unit through a wire.

[0010] The laser projects laser light onto the surface of the fleece fabric to form a laser stripe image.

[0011] A laser bracket support rod is fixedly connected to the laser bracket inside one side of the support frame where the feeding port is arranged and located above the conveying mechanism. The laser bracket support rod is connected to the laser bracket, and the laser is fixed on the laser bracket.

[0012] The light supply unit includes a light panel fixed on the top of the support frame;

[0013] The image acquisition unit includes a camera bracket fixedly connected to the inner side of the top of the support frame, the camera bracket is located directly above the synchronous belt, a camera clamp is fixedly connected to the camera bracket, a camera is fixedly connected to the camera clamp, and the camera optical axis is perpendicular to the surface of the fleece fabric.

[0014] The support frame is a three-layer support frame of a rectangular structure. The top, bottom, left and right sides of the support frame are respectively provided with an upper end cover, a base plate, a left baffle and a right baffle. The left baffle and the right baffle are respectively provided with a loading port and a unloading port at the positions corresponding to the middle layer of the support frame, and the bearing seat is fixed on the middle layer of the support frame.

[0015] The control unit comprises a PLC controller arranged on a bottom plate, the PLC controller is sequentially connected to a motor driver and a frequency converter through cables, and the frequency converter is connected to a stepper motor through cables.

[0016] The beneficial effects of the utility model are:

[0017] The utility model uses a laser and an image acquisition unit to shoot a single-frame light stripe image, and through the operation of a transmission mechanism, shoots continuous frames of the light stripe image on the surface of a fleece fabric to shoot high-quality light stripe images; a frequency converter can adjust the speed of the transmission mechanism; the overall structure is simple and easy to process.

[0018] The utility model can obtain the deep information of the fleece fabric by irradiating the striped laser, capture some small and complex parts, and prepare for the three-dimensional reconstruction of the fleece fabric surface by shooting multiple frames in a row. The light unit is set to shoot under the same lighting conditions, which reduces the influence on the accuracy of the later three-dimensional reconstruction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an image acquisition device for three-dimensional reconstruction of the surface topography of fleece fabrics according to the utility model;

[0020] Figure 2 It is a structural schematic diagram of a transmission mechanism in an image acquisition device for three-dimensional reconstruction of the surface topography of fleece fabrics according to the utility model;

[0021] Figure 3 It is a schematic diagram of the installation structure of the camera and the laser in the image acquisition device for three-dimensional reconstruction of the surface morphology of fleece fabrics of the utility model;

[0022] Figure 4 It is a schematic diagram of the arrangement structure of the feeding port in the image acquisition device for three-dimensional reconstruction of the surface morphology of fleece fabrics according to the utility model;

[0023] Figure 5 The utility model is a schematic diagram of the arrangement structure of a feed opening in an image acquisition device for three-dimensional reconstruction of the surface morphology of fleece fabrics.

[0024] In the figure: 1. PLC controller, 2. camera bracket, 3. camera clamp, 4. laser bracket support rod, 5. support frame, 6. frequency converter, 7. motor driver, 8. rotating shaft, 9. rotating roller, 10. synchronous belt, 11. bearing seat, 12. bottom plate, 13. camera, 14. laser, 15. laser bracket, 16. base, 17. nut, 18. stepper motor, 20. motor bracket, 21. upper end cover, 22. left baffle, 23. right baffle, 24. coupling, 26. gusset, 27. loading port, 28. unloading port. DETAILED DESCRIPTION

[0025] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0026] Example 1

[0027] The image acquisition device used for three-dimensional reconstruction of the surface morphology of fleece fabrics has a structure as follows Figure 1As shown, it includes a support frame 5, and the corresponding two side surfaces of the support frame 5 are respectively provided with a loading port 27 and a unloading port 28. A conveying mechanism is provided between the loading port 27 and the unloading port 28 in the support frame 5, and the conveying mechanism is connected to a driving mechanism. A laser 14 is provided inside the side of the support frame 5 where the loading port 27 is provided, and is located above the conveying mechanism. A light supply unit is connected to the upper end cover 21 of the support frame 5. An image acquisition unit is also provided on the support frame 5 just above the conveying mechanism. The fleece fabric is horizontally transported from the loading port 27 to the unloading port 28 through the conveying mechanism in the support frame 5. The driving mechanism is connected to a control unit through a wire. The laser line emitted by the laser 14 forms an angle of 30° with the surface of the fleece fabric. The laser 14 projects the laser onto the surface of the fleece fabric to form a laser stripe image; the optical axis of the image acquisition unit is perpendicular to the surface of the fleece fabric.

[0028] The working principle of this embodiment is:

[0029] The control unit controls the driving mechanism to drive the conveying mechanism, and the fleece fabric is horizontally transported from the loading port 27 to the unloading port 28 through the conveying mechanism in the support frame 5. During the conveying process, the laser 14 projects laser light onto the surface of the fleece fabric, and the image acquisition unit realizes continuous frame capture of light stripe images under the action of the conveying mechanism.

[0030] Example 2

[0031] On the basis of Example 1, Figure 2 As shown, the conveying mechanism includes a rotating shaft 8 that is arranged in the support frame 5 and is rotatably arranged at the corresponding loading port 27 and unloading port 28. The rotating shaft 8 is connected to the driving mechanism. Rotating rollers 9 are fixedly installed on the two rotating shafts 8. A synchronous belt 10 is commonly sleeved on the two rotating rollers 9. Deep groove ball bearings are connected to both ends of the rotating shaft 8. The deep groove ball bearings are fixed at the corresponding positions of the support frame 5 through bearing seats 11.

[0032] The control unit controls the driving mechanism to drive the rotating shaft 8 to rotate, so that the synchronous belt 10 rotates synchronously, the laser 14 projects laser onto the fleece fabric surface on the synchronous belt 10, and then the image acquisition unit uses continuous frame shooting of the light stripe image on the fleece fabric surface on the synchronous belt 10.

[0033] Example 3

[0034] On the basis of Example 2, the driving unit includes a stepper motor 18 fixedly connected to the support frame 5, the output end of the stepper motor 18 is connected to any rotating shaft 8 through a coupling 24, and the stepper motor 18 is connected to the control unit through a wire.

[0035] The driving unit includes a stepper motor 18 fixedly connected to the support frame 5. The output end of the stepper motor 18 is connected to the rotating shaft 8 through a coupling 24. The rotating shaft 8 is connected to the bearing seat 11 through a deep groove ball bearing. The stepper motor 18 can drive the rotating shaft 8 to rotate, and the rotating roller 9 and the synchronous belt 10 rotate synchronously.

[0036] The stepper motor 18 is connected to the support frame 5 via a motor bracket 20, which can increase the overall stability. The connection is made by screws.

[0037] Example 4

[0038] On the basis of Example 3, Figure 3 As shown, a laser bracket support rod 4 is fixedly connected to the inner side of the feeding port 27 of the support frame 5 above the conveying mechanism, the laser bracket support rod 4 is connected to the laser bracket 15, and the laser 14 is fixed on the laser bracket 15. The image acquisition unit includes a camera bracket 2 fixedly connected to the inner side of the top of the support frame 5, the camera bracket 2 is located directly above the synchronous belt 10, the camera bracket 2 is fixedly connected to the camera clamp 3, the camera clamp 3 is fixedly connected to the camera 13, and the optical axis of the camera 13 is perpendicular to the surface of the fleece fabric.

[0039] The light supply unit comprises a light panel fixed on the top of the support frame 5, and the light panel is a light panel with adjustable light intensity to adjust the light brightness.

[0040] Example 5

[0041] On the basis of Example 1, Figure 4-5 As shown, the support frame 5 is a three-layer support frame of a rectangular parallelepiped structure, and the top, bottom, left and right sides of the support frame 5 are respectively provided with an upper end cover 21, a bottom plate 12, a left baffle 22, and a right baffle 23. The left baffle 22 and the right baffle 23 are respectively provided with a loading port 27 and a unloading port 28 at positions corresponding to the middle layer of the support frame 5. The bearing seat 11 is fixed to the middle layer of the support frame 5. After the fleece-pulling process, the fabric is cut to a certain length by a slitting device, and is directly loaded from the slitting device through the loading port 27. With the synchronous transmission of the conveying mechanism, the light stripe image is continuously captured, and the conveying mechanism gradually transports the fleece fabric to the unloading port for unloading. This reciprocating process is carried out to achieve continuous loading and unloading.

[0042] Example 6

[0043] On the basis of the third embodiment, the control unit comprises a PLC controller 1 arranged on a base plate 12 , the PLC controller 1 is sequentially connected to a motor driver 7 and a frequency converter 6 via cables, and the frequency converter 6 is connected to a stepper motor 18 via cables.

[0044] The PLC controller 1 is connected to the motor driver 7 through a cable, the motor driver 7 is connected to the motor 18 through a cable, and the frequency converter 6 is connected to the stepper motor 18 through a cable. The PLC controller 1 adopts Siemens S7-1200PLC, the motor driver 7 is used to control the unidirectional operation of the motor 18, and the frequency converter 6 is used to realize the variable speed operation of the stepper motor 18. The PLC controller 1 transmits the signal to the motor driver 7 through a high-speed pulse instruction, and then the motor driver 7 controls the motor 18 to operate at different speeds. The PLC controller 1 transmits the high-speed pulse signal to the motor driver 7, and the motor driver 7 drives the stepper motor 18 to start, and the conveying mechanism starts to move to perform the loading task. Under the operation of the conveying mechanism, continuous frame shooting of the light stripes on the surface of the fleece fabric is realized, and the conveying mechanism conveys the fleece fabric to the unloading port and unloads it through the unloading port.

[0045] Example 7

[0046] Based on the fifth embodiment, each corner of the support frame 5 is further provided with a gusset plate 26 .

[0047] The working principle of the utility model is:

[0048] When loading, the PLC controller 1 transmits a high-speed pulse signal to the motor driver 7, and the motor driver 7 drives the motor 18 to rotate. The frequency converter 6 is used to adjust the rotation speed of the motor during loading, so that the motor rotates slowly through the loading port 27. After the loading work is completed, the frequency converter 6 adjusts the power of the motor to make the motor run at a normal speed. The motor rotates the rotating shaft 8 in the transmission mechanism through the coupling 24. The rotating shaft 8 is fixedly connected to the rotating roller 9 and the synchronous belt 10 to rotate at the same speed. The laser 14 projects the laser onto the surface of the fleece fabric on the synchronous belt 10. The optical axis of the camera 13 is perpendicular to the surface of the fleece fabric placed on the synchronous belt 10. The camera 13 takes continuous frame shots of the light stripe image when the synchronous belt 10 is running, forming a dynamic shooting process. In order to ensure the imaging quality, continuous loading and unloading is formed through the rotation of the transmission mechanism to achieve continuous imaging of the fleece fabric.

[0049] The utility model controls the working time of the stepper motor 18 through the PLC controller 1, and the frequency converter 6 controls the speed of the motor 18. The laser 14 projects laser onto the surface of the fleece fabric. Based on the laser triangulation method, the angle between the laser line and the surface of the fleece fabric is 30°. The optical axis of the camera 13 is perpendicular to the surface of the fleece fabric. Continuous frame shooting of light stripe images is achieved under the action of the transmission mechanism. The overall structure is simple and easy to manufacture and install.

Claims

1. An image acquisition device for three-dimensional reconstruction of the surface morphology of fleece fabrics, characterized in that: The invention comprises a support frame (5), wherein a loading port (27) and a unloading port (28) are respectively arranged on corresponding side surfaces of the support frame (5), a conveying mechanism is arranged inside the support frame (5) between the loading port (27) and the unloading port (28), the conveying mechanism is connected to a driving mechanism, a laser (14) is arranged inside one side of the support frame (5) where the loading port (27) is arranged, and located above the conveying mechanism, a light supply unit is also arranged on the support frame (5) and located above the conveying mechanism, an image acquisition unit is also arranged on the support frame (5) and located directly above the conveying mechanism, the fleece fabric is horizontally transported from the loading port (27) to the unloading port (28) via the conveying mechanism inside the support frame (5), and the driving mechanism is connected to a control unit via a wire.

2. The image acquisition device for three-dimensional reconstruction of fleece fabric surface morphology according to claim 1, characterized in that: The laser line emitted by the laser (14) forms an angle of 30° with the fleece fabric surface; and the optical axis of the image acquisition unit is perpendicular to the fleece fabric surface.

3. The image acquisition device for three-dimensional reconstruction of fleece fabric surface morphology according to claim 1 or 2, characterized in that: The conveying mechanism comprises rotating shafts (8) arranged in the support frame (5) at positions corresponding to the loading port (27) and the unloading port (28), respectively, the rotating shafts (8) being connected to the driving mechanism, and rotating rollers (9) being fixedly mounted on the two rotating shafts (8), and a synchronous belt (10) being commonly sleeved on the two rotating rollers (9).

4. The image acquisition device for three-dimensional reconstruction of fleece fabric surface morphology according to claim 3, characterized in that: Deep groove ball bearings are connected to both ends of the rotating shaft (8), and the deep groove ball bearings are fixed at corresponding positions of the supporting frame (5) via bearing seats (11).

5. The image acquisition device for three-dimensional reconstruction of fleece fabric surface morphology according to claim 4, characterized in that: The driving mechanism comprises a stepper motor (18) fixedly connected to a support frame (5), an output end of the stepper motor (18) being connected to any one of the rotating shafts (8) via a coupling (24), and the stepper motor (18) being connected to the control unit via a wire.

6. The image acquisition device for three-dimensional reconstruction of fleece fabric surface morphology according to claim 3, characterized in that: The laser (14) projects laser light onto the surface of the fleece fabric to form a laser stripe image.

7. The image acquisition device for three-dimensional reconstruction of fleece fabric surface morphology according to claim 3, characterized in that: A laser bracket support rod (4) is fixedly connected to the support frame (5) on one side where the loading port (27) is provided, and is located above the conveying mechanism. The laser bracket support rod (4) is connected to the laser bracket (15), and the laser (14) is fixed to the laser bracket (15).

8. The image acquisition device for three-dimensional reconstruction of fleece fabric surface morphology according to claim 3, characterized in that: The light supply unit comprises a light panel fixed on the top of the support frame (5); The image acquisition unit comprises a camera bracket (2) fixedly connected to the inner side of the top of the support frame (5), the camera bracket (2) being located directly above the synchronous belt (10), a camera clamping plate (3) being fixedly connected to the camera bracket (2), a camera (13) being fixedly connected to the camera clamping plate (3), and an optical axis of the camera (13) being perpendicular to the surface of the fleece fabric.

9. The image acquisition device for three-dimensional reconstruction of fleece fabric surface morphology according to claim 5, characterized in that: The support frame (5) is a three-layer support frame of a rectangular parallelepiped structure. An upper end cover (21), a bottom plate (12), a left baffle (22), and a right baffle (23) are respectively provided on the top, bottom, left, and right sides of the support frame (5). A loading port (27) and a unloading port (28) are respectively provided on the left baffle (22) and the right baffle (23) at positions corresponding to the middle layer of the support frame (5). The bearing seat (11) is fixed to the middle layer of the support frame (5).

10. The image acquisition device for three-dimensional reconstruction of fleece fabric surface morphology according to claim 9, characterized in that: The control unit comprises a PLC controller (1) arranged on a base plate (12); the PLC controller (1) is sequentially connected to a motor driver (7) and a frequency converter (6) via cables; and the frequency converter (6) is connected to the stepping motor (18) via cables.

Images