Device for acquiring plant leaf surface information

Abstract

The present invention relates to the field of darkroom cameras, aiming to provide a device for acquiring plant leaf surface information that is easy to operate and provides high-quality images. The technical solution is: a device for acquiring plant leaf surface information, comprising a darkroom camera; the device is characterized in that the darkroom is equipped with a camera, a fill light, a pressure plate for securing the leaves, a clamping mechanism for clamping the pressure plate, and an intermittent rotation mechanism that drives the clamping mechanism to rotate and adjust the leaf angle.

Description

Technical Field

[0001] The invention relates to the field of darkroom cameras, and in particular to a device for acquiring plant leaf surface information. Background Art

[0002] In the field of deep learning, convolutional neural networks are widely used for target recognition and classification. Deep learning-based methods are also widely used in agriculture. Based on the characteristic information of plant leaves, they can automatically identify target species and achieve classification without excessive interference or damage to the plant itself. The foundation of deep learning lies in the acquisition of high-quality image datasets.

[0003] Plant leaves are organs with long growth cycles, easy to obtain, and have distinctive characteristics. The characteristic information of their surface leaves, such as leaf shape, vein patterns, color, and leaf thickness, can be used for classification. Since leaves in nature are naturally curved, they are easily affected by light and background under external illumination, which reduces the image quality. Traditional image acquisition devices are cumbersome to operate when acquiring images of the front and back of leaves, and cannot easily acquire thickness information of plant leaves. Therefore, designing a leaf surface information acquisition device that can adjust the leaf posture, degree of curvature, lighting conditions, and obtain leaf thickness information has important application value. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the above-mentioned background technology and provide a device for acquiring plant leaf surface information, which should have the characteristics of easy operation and high image quality.

[0005] The technical solution of the present invention is:

[0006] A device for acquiring plant leaf surface information comprises a darkroom, characterized in that the darkroom is provided with a camera, a fill light, a pressure plate for fixing the leaf, a clamping mechanism for clamping the pressure plate, and an intermittent rotating mechanism for driving the clamping mechanism to rotate to adjust the leaf angle.

[0007] The intermittent rotation mechanism includes a gear ring fixed to the dark box, a gear rotatably positioned in the gear ring through a bracket and meshing with the gear ring, a pull rod fixed to the gear through a crank, a limiting ring fixed to the bracket, a handle fixed to the bracket, and a turntable rotatably positioned on the dark box; the edge of the turntable is provided with recesses that match the limiting rings, and protrusions are formed between the recesses. Each protrusion is provided with a slot that matches the pull rod. When the crank rotates, the pull rod can be embedded in the slot to drive the turntable to rotate a certain angle; the limiting ring is provided with a notch to avoid the protrusion.

[0008] Both sides of the pressing plate are provided with clamping mechanisms, and one of the clamping mechanisms is connected to the intermittent rotating mechanism.

[0009] The clamping mechanism comprises a clamping seat, a pressing arm swingably positioned on the clamping seat, and a telescopic member for pushing the pressing arm to move.

[0010] The telescopic member includes a telescopic cylinder rotatably positioned on the dark box, a telescopic rod axially slidably positioned in the telescopic cylinder, a telescopic spring that pushes the telescopic rod to retract into the telescopic cylinder, a locking structure that locks the telescopic rod and the telescopic cylinder, a rack arranged in the telescopic cylinder and connected to the telescopic rod, and an incomplete gear meshing with the rack and equipped with a shift rod.

[0011] The clamping seat is fixed at the front end of the telescopic cylinder, and the connecting rod is rotatably hinged between the telescopic rod and the pressure arm; the telescopic cylinder of one of the telescopic parts is coaxially connected with the turntable.

[0012] The pressing plate comprises a bottom plate and a cover plate which is openably and closably positioned on the bottom plate; and a pressing strip is provided on the pressing arm.

[0013] The dark box includes a box body and a door; the camera is arranged at the upper part of the dark box cavity, the fill light is arranged at the middle part of the dark box cavity, and the clamping mechanism is arranged at the lower part of the dark box cavity.

[0014] The box door is mounted on the front side of the box body via a detachable hinge.

[0015] The beneficial effects of the present invention are:

[0016] The present invention provides a device for acquiring plant leaf surface information. When photographing the same leaf, only one clamping operation is required, and the operation of replacing the leaf is also simple and quick. The present invention can quickly and accurately obtain front and back images and side images of the plant leaf, thereby acquiring the front and back surface characteristics and thickness information of the leaf, reducing the data set acquisition and feature collection time, and facilitating target recognition and target classification of the convolutional neural network. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the present invention (omitted the box door).

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the clamping mechanism and the intermittent rotating mechanism of the present invention.

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the telescopic member of the present invention.

[0020] Figure 4 It is a schematic cross-sectional structural diagram of the telescopic member of the present invention.

[0021] Figure 5 It is one of the three-dimensional structural schematic diagrams of the intermittent rotating mechanism of the present invention.

[0022] Figure 6This is the second schematic diagram of the three-dimensional structure of the intermittent rotating mechanism of the present invention.

[0023] Figure 7 This is the third schematic diagram of the three-dimensional structure of the intermittent rotating mechanism of the present invention.

[0024] Figure 8 It is a schematic diagram of the three-dimensional structure of the gear ring of the present invention.

[0025] Figure 9 It is a schematic diagram of the three-dimensional structure of the gear, crank and limiting ring of the present invention.

[0026] Figure 10 It is a schematic diagram of the three-dimensional structure of the turntable of the present invention.

[0027] Figure 11 It is a schematic diagram of the three-dimensional structure of the pressing plate of the present invention.

[0028] Figure 12 It is a schematic diagram of the motion trajectory of the pull rod of the present invention.

[0029] Reference numerals:

[0030] Darkroom 1, detachable hinge 1.1, camera 2, camera mounting bracket 2.1, fill light 3, fill light mounting bracket 3.1, pressure plate 4, ring gear 5, bracket 6, gear 7, crank 8, pull rod 9, sleeve 9.1, limit ring 10, notch 10.1, handle 11, turntable 12, notch 12.1, protrusion 12.2, slot 12.3, column 12.4, clamping base 13, pressure arm 14, pressure strip 14.1, telescopic cylinder 15, strip groove 15.1, telescopic rod 16, telescopic spring 17, rack 18, shift lever 19, incomplete gear 20, connecting rod 21, base plate 22, cover plate 23, pressure plate hinge 24, controller 30, recessed hole 31, slide column 32, button 33, locking spring 34, lockhole 35. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] like Figure 1 As shown, a device for obtaining plant leaf surface information includes a darkroom 1, a camera 2, a fill light 3, a pressing plate 4, a clamping mechanism, an intermittent rotating mechanism, and a controller 30.

[0033] The pressure plate is used to clamp the blade, the clamping mechanism is used to fix the pressure plate, the intermittent rotating mechanism is used to drive the clamping mechanism to rotate to adjust the blade angle, the fill light is used to provide auxiliary light during shooting, and the camera is used to obtain the blade image.

[0034] The dark box is a rectangular parallelepiped structure, and all six sides of the dark box are made of black acrylic panels. The dark box includes a box body and a door, and the door is mounted on the front of the box body through a detachable hinge 1.1.

[0035] The camera, fill light, and clamping mechanism are respectively arranged at the upper, middle, and lower portions of the darkbox cavity. The camera is fixed to the upper portion of the darkbox cavity via a camera mounting bracket 2.1 (with the camera lens facing downward). The fill light is fixed to the middle portion of the darkbox cavity via a fill light mounting bracket 3.1 (to avoid obstructing the camera lens). The pressure plate is arranged at the lower portion of the darkbox cavity, and clamping mechanisms are also provided on both sides of the pressure plate. The intermittent rotating mechanism is arranged outside the darkbox and is connected to one of the clamping mechanisms. The controller is electrically connected to the camera and the fill light.

[0036] The pressure plate includes a base plate 22 and a cover plate 23. The cover plate is positioned on the base plate by a pressure plate hinge 24. Both the base plate and the cover plate are made of transparent acrylic. When shooting, the blade is placed on the base plate and the cover plate is closed to press the blade.

[0037] The clamping mechanism includes a clamping seat 13, a pressing arm 14, and a telescopic member. The pressing arm is swingably positioned on the clamping seat and is provided with a pressure strip 14.1. The pressure plate is placed on the clamping seat. When the pressing arm is pressed down, pressure is applied through the pressure strip to ensure that the cover plate is tightly pressed against the blade.

[0038] The clamping seat is installed on the telescopic part, which can drive the pressure arm to move to fix the pressure plate and the blade. The intermittent rotating mechanism drives the clamping mechanism on one side to rotate (the clamping mechanism on the other side rotates passively), thereby changing the blade angle for easy shooting.

[0039] The telescopic member includes a telescopic cylinder 15, a telescopic rod 16, a telescopic spring 17, a rack 18, a lever 19, and a partial gear 20. The telescopic cylinder is horizontally arranged and rotatably positioned on the inner wall of the dark box (the telescopic cylinders on both sides are arranged coaxially). The telescopic rods are axially slidably positioned within the telescopic cylinder (the two telescopic rods move toward each other when extended and move in opposite directions when retracted). The telescopic rods are stepped shafts (including a thinner section and a thicker section). The telescopic springs are sleeved around the thinner section of the telescopic rod (the two ends of the telescopic springs respectively support the end caps of the telescopic cylinder and the thicker section of the telescopic rod). The telescopic springs can push the telescopic rods back into the telescopic cylinder. The rack is disposed within the telescopic cylinder and connected to the thicker section of the telescopic rod. The partial gear is rotatably positioned within the telescopic cylinder and meshes with the rack. The lever is fixed to the partial gear and extends out of the telescopic cylinder through a strip-shaped slot 15.1. A locking structure is provided between the telescopic rod and the telescopic cylinder.

[0040] In the locking structure, a recessed hole 31 is provided on the thicker section of the telescopic rod, in which a slide post 32 is provided. The top of the slide post is provided with a button 33 that can move up and down. A locking spring 34 is sleeved on the slide post and supports the bottom surface of the button. A locking hole 35 that cooperates with the button is provided on the wall of the telescopic cylinder. The locking hole is used to limit the button from popping out, and the protrusion at the top of the button can extend outside the locking hole.

[0041] When the telescopic rod is retracted into the telescopic tube, the button and the lock hole are offset and the button presses against the inner wall of the telescopic tube. Figure 4 The telescopic rod moves outwards (in the direction of the arrow) to overcome the resistance of the telescopic spring until the button engages the lock hole and the telescopic rod is locked and stops moving. If the button is pressed, the button disengages the lock hole and the telescopic spring pushes the telescopic rod back into the telescopic tube.

[0042] The clamping seat is fixed to the front end of the telescopic cylinder and is fixed to the telescopic cylinder via a clamping seat connector (omitted in the figure). The connecting rod 21 is rotatably hinged between the telescopic rod and the pressure arm. Therefore, when the telescopic rod is pushed out using the push rod, the telescopic rod drives the pressure arm downward through the connecting rod, thereby fixing the pressure plate and the blade. When the button is pressed, the telescopic rod retracts and the pressure arm is raised, allowing the pressure plate and the blade to be removed.

[0043] like Figure 1 As shown, the intermittent rotating mechanism is arranged on the left side of the dark box. The intermittent rotating mechanism includes a gear ring 5, a bracket 6, a gear 7, a crank 8, a pull rod 9, a limiting ring 10, a handle 11, and a turntable 12.

[0044] The gear ring is fixed to the side wall of the dark box, the bracket and the limiting ring are rotatably positioned on the side wall of the dark box, the gear is rotatably positioned on the bracket and the gear is meshed with the gear ring, the limiting ring is fixed to the bracket, and a notch 10.1 is provided on the limiting ring. The handle is fixed to the rotating shaft of the bracket, and the rotating axis of the bracket, the central axis of the limiting ring, and the central axis of the gear ring are coaxially arranged. The pull rod is fixed to the gear through a crank, and a rotatable sleeve 9.1 is provided on the pull rod. When the handle is turned, the limiting ring and the bracket rotate simultaneously, the gear rolls along the gear ring, and the pull rod also rotates around the gear. The movement trajectory of the pull rod is as follows Figure 12 shown.

[0045] The turntable is rotatably positioned on the side wall of the dark box. Four notches 12.1 are provided on the edge of the turntable. The shape of the notches is consistent with the shape of the limit ring. Radially extending protrusions 12.2 are formed between the notches (the gaps in the limit ring are used to avoid the protrusions). Each protrusion is provided with a slot 12.3 for matching the pull rod (the slot is composed of two columns 12.4). The rotating shaft of the turntable is connected to the telescopic cylinder of one of the telescopic parts.

[0046] The lever can intermittently engage the slot when it moves ( Figure 6 ), at this time, the motion trajectory of the pull rod is as follows Figure 12As shown by the arc A in the figure (embedded into the slot from point B, moving along arc A, and disengaged at point C), the movement trajectory of the pull rod coincides with the movement trajectory of the slot when the turntable rotates. The pull rod drives the turntable to rotate 90 degrees synchronously. When the turntable rotates, the protrusion is aligned with the notch, and the protrusion extends into the notch to prevent interference between the turntable and the limit ring. When the pull rod is disengaged from the slot ( Figure 7 ), the turntable stops rotating. At this time, the protrusion exits the notch, and the notch just surrounds the limit ring, which acts as a limit to prevent the turntable from rotating. After the gear rotates one circle, the pull rod enters the slot once, and the turntable rotates 90 degrees.

[0047] The turntable is also provided with an angle sensor (omitted in the figure), which is electrically connected to the controller. When the blade rotates to the horizontal and vertical positions, the camera takes pictures of the blade below, thereby obtaining the front and back images and side images of the blade. Through these data, the front and back images of the blade can be combined into one image, and then the thickness value of the blade can be calculated by measuring the side image of the blade.

[0048] All components of the present invention can be purchased from outside.

[0049] The working steps of the present invention are:

[0050] 1. Prepare the blades, place them on the bottom plate, and close the cover to press the blades;

[0051] 2. Open the door, place the pressing plate on the clamps on both sides, push the levers on both sides to fix the pressing plate, and turn on the fill light;

[0052] 3. Close the door and keep turning the handle. The intermittent rotation mechanism drives the pressure plate to rotate intermittently. After each 90-degree rotation of the pressure plate, it stops briefly for a certain period of time (the blades stop in the horizontal and vertical positions). At this time, the camera takes a picture of the blade below, and then continues to rotate until all four sides of the blade are photographed; turning the handle four times can make the blade rotate one circle to complete the shooting.

[0053] The accompanying drawings show preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

Claims

1. A device for acquiring plant leaf surface information, comprising a dark box (1); characterized in that: The dark box is provided with a camera (2), a fill light (3), a pressure plate (4) for fixing the blades, a clamping mechanism for clamping the pressure plate, and an intermittent rotating mechanism for driving the clamping mechanism to rotate to adjust the angle of the blades; The intermittent rotation mechanism comprises a gear ring (5) fixed to the dark box, a gear (7) rotatably positioned in the gear ring through a bracket (6) and meshing with the gear ring, a pull rod (9) fixed to the gear through a crank (8), a limiting ring (10) fixed to the bracket, a handle (11) fixed to the bracket, and a turntable (12) rotatably positioned on the dark box; the edge of the turntable is provided with notches (12.1) matching the limiting ring, protrusions (12.2) are formed between the notches, each protrusion is provided with a slot (12.3) matching the pull rod, and when the crank rotates, the pull rod can be embedded in the slot, thereby driving the turntable to rotate a certain angle; the limiting ring is provided with a notch (10.1) to avoid the protrusion; Both sides of the pressing plate are provided with clamping mechanisms, one of which is connected to the intermittent rotating mechanism; The clamping mechanism comprises a clamping seat (13), a pressing arm (14) swingably positioned on the clamping seat, and a telescopic member for pushing the pressing arm to move; The telescopic member comprises a telescopic cylinder (15) rotatably positioned on the dark box, a telescopic rod (16) axially slidably positioned in the telescopic cylinder, a telescopic spring (17) for pushing the telescopic rod to retract into the telescopic cylinder, a locking structure for locking the telescopic rod with the telescopic cylinder, a rack (18) arranged in the telescopic cylinder and connected to the telescopic rod, and an incomplete gear (20) meshing with the rack and equipped with a shifting rod (19).

2. The device for acquiring plant leaf surface information according to claim 1, characterized in that: The clamping seat is fixed to the front end of the telescopic cylinder, and the connecting rod (21) is rotatably hinged between the telescopic rod and the pressure arm; the telescopic cylinder of one of the telescopic parts is coaxially connected to the turntable.

3. The device for acquiring plant leaf surface information according to claim 2, characterized in that: The pressing plate comprises a bottom plate (22) and a cover plate (23) positioned on the bottom plate in an openable and closable manner; a pressing strip (14.1) is provided on the pressing arm.

4. The device for acquiring plant leaf surface information according to claim 3, characterized in that: The dark box includes a box body and a door; the camera is arranged at the upper part of the dark box cavity, the fill light is arranged at the middle part of the dark box cavity, and the clamping mechanism is arranged at the lower part of the dark box cavity.

5. The device for acquiring plant leaf surface information according to claim 4, characterized in that: The box door is mounted on the front side of the box body via a detachable hinge.

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