Crop image acquisition equipment

Abstract

The present invention relates to a crop image acquisition device, comprising a leaf clamp arranged on a workbench and an image acquisition machine for acquiring images of leaves clamped by the leaf clamp, wherein the leaf clamps are at least two, and the workbench is provided with a plurality of anti-reflection mechanisms corresponding to the leaves clamped by the leaf clamps in a one-to-one correspondence, and the anti-reflection mechanisms and cameras are located on both sides of the leaves. The present invention aims to provide an agricultural crop image acquisition device capable of imaging multiple leaves at a time and reducing background reflection of the leaves, thereby solving the problems of low efficiency, inaccuracy caused by excessive water loss, and inaccurate imaging caused by large background reflection in the existing imaging of leaves one by one.

Description

Technical Field

[0001] The present invention relates to the field of crop image acquisition and analysis, and in particular to a crop image acquisition device. Background Art

[0002] Hyperspectral imaging, thermal imaging, and chlorophyll fluorescence imaging through corresponding image acquisition devices (such as cameras, etc.) are the main methods of non-destructive crop monitoring at present. The single leaf images of crops obtained by these methods can realize early warning and monitoring of crops in stress states such as disease, drought, waterlogging, and nutrient deficiency.

[0003] When currently collecting hyperspectral images, thermal images, and chlorophyll fluorescence images of crops, generally only one crop can be collected at a time. When collecting more than two crops together, overlap, tilt, and other phenomena may occur, which may lead to low quality of crop image collection. Due to monitoring needs, the number of single-processing samples of crops collected is generally more than 2. The existing single image collection method takes a lot of time and may cause crop dehydration, especially the effect of the last collected image, resulting in inaccurate crop image collection. In addition, the reflected light from the background on the side of the leaf away from the image acquisition device will also lead to inaccurate crop image collection. Summary of the invention

[0004] The present invention aims to provide a crop image acquisition device that can image multiple leaves at a time and reduce background reflection of the leaves, thereby solving the problems of low efficiency, inaccurate imaging due to excessive water loss, and inaccurate imaging due to large background reflection when imaging leaves one by one.

[0005] The above technical problems are solved by the following technical solutions: a crop image acquisition device, comprising a leaf clamp arranged on a workbench and an image acquisition machine for acquiring images of leaves clamped by the leaf clamp, wherein there are at least two leaf clamps, and the workbench is provided with a plurality of anti-reflection mechanisms corresponding one-to-one to the leaves clamped by the leaf clamp, and the anti-reflection mechanisms and the camera are located on both sides of the leaves. When in use, a leaf clamp clamps a leaf, and the same image acquisition machine is used for imaging, thereby avoiding the problem of low efficiency of imaging leaves one by one and the dehydration of the leaves imaged later seriously affecting the imaging accuracy. The anti-reflection mechanism is arranged on the back of the imaged leaf, which can reduce the amount of light reflected by the background onto the leaf, and further improve the imaging accuracy.

[0006] Preferably, the anti-reflection mechanism is a black light absorbing layer arranged on the workbench, and the black light absorbing layers constituting all the anti-reflection mechanisms are connected together. By arranging the black light absorbing layer to absorb light, the amount of reflected light is reduced, and the interference of reflected light on blade imaging can be reduced.

[0007] The present invention also includes a plurality of light sources that emit parallel light for irradiating the blades clamped by the blade clamps one by one, and the light emitted by the light sources is downward; all the blade clamps are arranged on the same straight line and located on the same horizontal plane, and the anti-reflection mechanism includes a threaded vertical rod and two first reflective plates, one end of the two first reflective plates is hinged to the upper end of the threaded vertical rod through the same horizontal hinge shaft, and the other end of the first reflective plate is connected to the second reflective plate, the first reflective plate is perpendicular to the second reflective plate, the horizontal hinge shaft, the first reflective plate and the second reflective plate are parallel, the extension direction of the horizontal hinge shaft is perpendicular to the distribution direction of the blade clamps, the first reflective plate is located below the horizontal plane, the upper surface of the first reflective plate is a reflective surface, the upper surface of the second reflective plate is a reflective surface, and the threaded vertical rod The upper thread is connected with a lifting block, the lifting block is hinged with the lower ends of the two oblique supports, the upper ends of the two oblique supports are hinged with the two first reflectors in a one-to-one correspondence, and the two first reflectors are mirror-distributed on both sides of the threaded vertical rod; when the blade is clamped on the blade clamp, the width direction of the blade is the same as the distribution direction of the blade clamp, and the center line of the width direction of the blade is located on the same vertical plane as the horizontal hinge axis; the width of the blade clamped on the blade clamp is a blade with a set maximum width, and the inclination angle of the first reflector is such that the reflected light generated by the light from the center line of the width direction of the blade irradiating downward onto the first reflector just intersects with the outer edge of the widest part of the width direction of the blade, and the end of the second reflector away from the first reflector is located above the horizontal plane. This technical solution can make the reflected light generated by the part of the parallel light directed downward toward the blade that passes through the blade deviate from the blade by adjusting the angle of the first reflector when the width of the blade is less than the set maximum width, and will not irradiate to adjacent blades and interfere with the imaging of adjacent blades when the anti-reflection mechanism is compact. This technical solution can minimize the interference of reflected light on blade imaging.

[0008] Preferably, when the leaves are photographed by a camera, the crop image acquisition device is located in a dark room, which can reduce the amount of light reflected by the environment multiple times and then returned to the leaves, and has a good effect of preventing light interference.

[0009] Preferably, the light source comprises an LED lamp bead and a convex lens located below the LED lamp bead, and the LED lamp bead is located at the focus of the convex lens. A structure of a parallel light source is provided.

[0010] Preferably, the blade clamp includes a heightening seat, through which the blade clamp is connected to the workbench; when the blade clamp holds the blade and the blade is parallel to the workbench, the blade is located above the anti-reflection mechanism and the blade is spaced apart from the anti-reflection mechanism, so that the blade can be suspended in the air for imaging, and the imaging accuracy is good.

[0011] Preferably, the blade clamp also includes an elastic connecting piece and a dynamic clamping piece, one end of the dynamic clamping piece is connected to the upper surface of the heightening seat through the elastic connecting piece, a clamping opening is formed between the other end of the dynamic clamping piece and the upper surface of the heightening seat, the elastic connecting piece is used to drive the dynamic clamping piece to close toward the heightening seat so that the clamping opening is closed, the upper surface of the dynamic clamping piece is connected to one end of a crowbar, and the other end of the crowbar extends beyond the dynamic clamping piece toward the end away from the clamping opening. When in use, the clamping opening is opened by pressing down on the end of the crowbar away from the clamping opening to deform the image connecting piece, insert the petiole into the clamping opening, and then release the downward pressure on the crowbar. Under the elastic force of the elastic connecting piece, the clamping opening closes and clamps the petiole, thereby fixing the blade. A specific technical solution for the blade clamp is improved.

[0012] Preferably, the clamping end of the movable clamp is provided with an outer curling edge, the outer curling edge forms an axial hole, one end of the crowbar is provided with a hook head, the hook head is inserted into the axial hole to connect the crowbar with the movable clamp, which is convenient for fixing the crowbar.

[0013] Preferably, the movable clamp is provided with a plurality of needle tips at the portion constituting the clamping opening, the needle tips are distributed along the width direction of the clamping opening, a water outlet hole is provided in the needle tips, a water inlet channel is provided in the movable clamping plate, the outlet end of the water inlet channel is connected with the water outlet hole, a water inlet pipe is provided at the inlet end of the water inlet channel, and a water inlet valve is provided on the water inlet pipe. When in use, when the clamping opening clamps the petiole, at least one needle tip is inserted into the petiole, the water inlet pipe is connected with the water source, the water inlet valve is opened, so that the water from the water source reaches the water outlet hole after passing through the water inlet channel, and then is absorbed by the blade, so as to replenish the water to the blade, and prevent the blade from being dehydrated during detection and affecting the imaging effect.

[0014] Preferably, the upper surface of the height-increasing pad is a plane, a supporting platform is provided on the lower surface of the dynamic clamp, a height-increasing pad avoidance hole aligned with the supporting platform is provided on the upper surface of the height-increasing pad, a connecting column is provided on the bottom wall of the height-increasing pad avoidance hole, a threaded hole is provided on the upper end surface of the connecting column, and the threaded hole is coaxial with the connecting column, the blade clamp also includes a supporting column, a supporting column avoidance hole is provided on the lower end surface of the supporting column, a threaded connector is provided on the bottom wall of the supporting column avoidance hole, the threaded connector is threadedly connected in the threaded hole, and a connecting column is provided at the lower end The connecting column is inserted into the avoidance hole of the support column part and is spaced apart from the avoidance hole of the heightened pad part, and the upper end is supported on the support platform. Two scales are provided on the circumferential surface of the support column. The scale value of one scale increases from bottom to top, and the scale value of the other scale increases from top to bottom, and the zero scales of the two scales are aligned; when the threaded connector is screwed into the threaded hole to a maximum depth, the upper surface of the heightened pad is aligned with the zero scale, the clamp is in a closed state, and the support column is overlapped with the support platform. When in use, first rotate the support column so that the threaded connector is screwed into the threaded hole to the limit position (at this time, the zero scale is aligned with the upper surface of the support platform), the clamp is in a completely closed state, the petiole of the leaf to be clamped is placed flat on the upper surface of the heightening pad and abutted against the support column, observe the scale value of the scale on the outside of the heightening pad of the support column to obtain the diameter X1 of the petiole, and then according to the deformation amount of the petiole required for tightening the petiole (assuming that the deformation amount is X2), rotate the support column so that the scale in the avoidance hole of the support column is aligned with the upper surface of the heightening pad. The scale value is (X1-X2), When the support column is screwed out of the heightening pad, it pushes the support platform to open the clamp by a distance of X1-X2, and then presses down the end of the pry bar away from the clamp to deform the image connecting piece to open the clamp, insert the petiole into the clamp, and then release the downward pressure on the pry bar. Under the elastic force of the elastic connecting piece, the clamp closes and clamps the petiole, thereby fixing the leaf. When the movable clamp is closed to be supported by the support column, it cannot continue to close, and finally the deformation amount of the petiole when the leaf clamp clamps the rocker is X2 (i.e., within the set deformation range), which prevents the petiole with poor pressure bearing capacity from being damaged due to the different pressure bearing capacity of different petioles. This technical solution can easily know whether the support column is screwed out to the required height, and realizes that although the support column is threadedly connected to the heightening pad, it does not interfere with the setting of the scale, and although the scale enters the interior of the heightening pad and rotates through it, it will not cause wear.

[0015] The present invention has the following advantages: more than two leaves can be imaged at one time, the efficiency is high, the leaves are less dehydrated, and the imaging accuracy can be improved; the leaf clamp can replenish water to the leaf during imaging, and the dehydration amount can be further reduced to improve the imaging accuracy; an anti-reflection mechanism is arranged on the back of the imaged leaf, which can reduce the amount of light reflected by the background onto the leaf, and further improve the imaging accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view schematic diagram of the first embodiment of the present invention;

[0017] Figure 2 A schematic top view of a workbench of the present invention;

[0018] Figure 3 is a schematic diagram of a blade clamp;

[0019] Figure 4 for Figure 3 A local enlarged schematic diagram of point A;

[0020] Figure 5 It is a partial enlarged schematic diagram of point B in FIG3 .

[0021] Figure 6 This is a schematic diagram of the anti-reflection mechanism of the second embodiment of the present invention when imaging a blade having a width of a set maximum value;

[0022] Figure 7 This is a schematic diagram of imaging blades of different widths in Example 2;

[0023] In the figure: workbench 1, blade clamp 2, image acquisition machine 3, anti-reflection mechanism 4, light source 5, LED lamp bead 6, convex lens 7, horizontal plane 8, heightening seat 9, movable clamp 10, elastic connecting piece 11, crowbar 12, outer curling edge 13, shaft hole 14, hook head 15, the other end of the crowbar 16, needle tip 17, water outlet 18, water inlet channel 19, water inlet pipe 20, water inlet valve 21, support platform 22, heightening cushion avoidance hole 23, connecting column 24, threaded hole 25, support column 26, support column avoidance hole 27, threaded connector 28, threaded vertical rod 29 , a first reflector 30, a second reflector 31, a lifting block 32, an oblique support 33, a blade 34 having a set maximum width, light 35 irradiated downward onto the first reflector from the center line of the blade in the width direction, reflected light 36 generated by light irradiated downward onto the first reflector from the center line of the blade in the width direction, an outer edge 37 of the widest part of the blade in the width direction, an end 38 of the second reflector away from the first reflector, a connecting frame 39, a blade 40, and light 41 irradiated downward onto the first reflector from the outer edge of the widest part of the blade in the width direction. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example 1, see Figure 1 and Figure 2 , a crop image acquisition device, including a leaf clamp 2 arranged on a workbench 1 and an image acquisition machine 3 for acquiring images of leaves clamped by the leaf clamp. There are five leaf clamps (only three are drawn in the figure), and a plurality of anti-reflection mechanisms 4 corresponding to the leaves clamped by the leaf clamp are arranged on the workbench, and the anti-reflection mechanisms and the camera are located on both sides of the leaves. The anti-reflection mechanism is a black light-absorbing layer arranged on the workbench, and the black light-absorbing layers constituting all the anti-reflection mechanisms are connected together. The present invention also includes a plurality of light sources 5, which emit parallel light for irradiating the leaves clamped by the leaf clamp one by one. The light source emits light downward. The light source includes an LED lamp bead 6 and a convex lens 7 located below the LED lamp bead, and the LED lamp bead is located at the focus of the convex lens. All the leaf clamps are arranged on the same straight line and located on the same horizontal plane 8. The light source and the image acquisition machine are connected to the workbench through a connecting frame 39.

[0026] The blade clamp includes a heightening seat 9, through which the blade clamp is connected to the workbench; when the blade clamp clamps the blade and the blade is parallel to the workbench, the blade is located above the anti-reflection mechanism, and the blade and the anti-reflection mechanism are spaced apart (that is, there is no contact between the blade and the anti-reflection mechanism). The blade clamp also includes a movable clamp 10, one end of which is connected to the upper surface of the heightening seat through an elastic connecting piece 11, and a clamping opening is formed between the other end of the movable clamp and the upper surface of the heightening seat. The elastic connecting piece is used to drive the movable clamp to close toward the heightening seat so that the clamping opening is closed, and the upper surface of the movable clamp is connected to one end of a crowbar 12. Specifically: the clamping end of the movable clamp is provided with an outer curling edge 13, and the outer curling edge forms an axial hole 14. One end of the crowbar is provided with a hook head 15, and the hook head is inserted into the axial hole to connect the crowbar with the movable clamp. The other end 16 of the crowbar extends beyond the movable clamp toward the end away from the clamping opening. The movable clamp is provided with a plurality of needle tips 17 at the portion constituting the clamping opening, and the needle tips are distributed along the width direction of the clamping opening, and a water outlet hole 18 is provided in the needle tips, and a water inlet channel 19 is provided in the movable clamp, and the outlet end of the water inlet channel is connected with the water outlet hole, and a water inlet pipe 20 is provided at the inlet end of the water inlet channel, and a water inlet valve 21 is provided on the water inlet pipe. The upper surface of the heightening pad is a plane, and a support platform 22 is provided on the lower surface of the movable clamp, and a heightening pad portion avoidance hole 23 aligned with the support platform is provided on the upper surface of the heightening pad, and a connecting column 24 is provided on the bottom wall of the heightening pad portion avoidance hole, and a threaded hole 25 is provided on the upper end surface of the connecting column, and the threaded hole is coaxial with the connecting column, and the blade clamp also includes a supporting column 26, and a supporting column portion avoidance hole 27 is provided on the lower end surface of the supporting column, and a threaded connector 28 is provided on the bottom wall of the supporting column portion avoidance hole, and the threaded connector is threadedly connected in the threaded hole, and the lower end of the supporting column is penetrated in the heightening pad portion avoidance hole. The high pad part is in the avoidance hole and is spaced apart from the avoidance hole of the heightened pad part, and the upper end is supported on the support platform. The connecting column is inserted into the avoidance hole of the support column part. Two scales distributed in the up and down directions and located in a straight line are provided on the circumferential surface of the support column. The scale value of one scale increases from bottom to top, and the scale value of the other scale increases from top to bottom, and the zero scales of the two scales are aligned; when the threaded connector is screwed into the threaded hole to a maximum depth, the upper surface of the heightened pad is aligned with the zero scale, the clamp is in a closed state, and the support column is overlapped with the support platform.

[0027] When in use, a leaf clamp clamps the petiole of a leaf 40 to fix the leaf, and the leaf is in a horizontal state, and then an image acquisition machine is used to capture images.

[0028] The process of clamping the petiole is: when the petiole is hard (such as the petiole of legumes), the deformation of the petiole X2 is 0.5 mm, and when the petiole is soft (such as the petiole of vegetables and melons), the deformation of the leaf is 1.5 mm. First, rotate the support column so that the threaded connector is screwed into the threaded hole to the limit position (at this time, the zero scale is aligned with the upper surface of the support platform), the clamp is in a completely closed state, and the petiole of the leaf to be clamped is placed flat on the upper surface of the heightening pad and abutted against the support column. Observe the scale value of the scale on the outside of the heightening pad of the support column to obtain the diameter X1 of the petiole, and then rotate the support column so that the scale on the support column located in the avoidance hole of the heightening pad is aligned with the scale value of the upper surface of the heightening pad (X1-X2) (that is, the support column is screwed out (X1-X2), When the support column is rotated out of the heightening pad, the support platform is pushed up to keep the opening distance of the clamp at X1-X2, and then the end of the crowbar is pressed down away from the clamp to deform the image connecting piece to realize the opening of the clamp, and the petiole is inserted into the clamp, and then the downward pressure on the crowbar is released. Under the elastic force of the elastic connecting piece, the clamp closes and clamps the petiole, thereby fixing the blade. When the movable clamp is closed to be supported by the support column, it cannot continue to close, and finally the deformation amount of the petiole when the blade clamp clamps the crank handle is X2. When clamping the petiole, at least one needle tip is inserted into the petiole, the water inlet pipe is connected to the water source, and the water inlet valve is opened, so that the water from the water source reaches the water outlet after passing through the water inlet channel, and then is absorbed by the blade, which plays a role in replenishing water to the blade. When the blade is photographed by a camera, the present invention is located in a dark room.

[0029] Embodiment 2 is different from Embodiment 1 in that:

[0030] See also Figure 6 and Figure 7The anti-reflection mechanism includes a threaded vertical rod 29 and two first reflective plates 30, one end of the two first reflective plates is hinged to the upper end of the threaded vertical rod through the same horizontal hinge axis, the other end of the first reflective plate is connected to the second reflective plate 31, the first reflective plate is perpendicular to the second reflective plate, the horizontal hinge axis, the first reflective plate and the second reflective plate are parallel, the extension direction of the horizontal hinge axis is perpendicular to the distribution direction of the blade clip, the first reflective plate is located below the horizontal plane, the upper surface of the first reflective plate is a reflective surface, the upper surface of the second reflective plate is a reflective surface, a lifting block 32 is threadedly connected to the threaded vertical rod, the lifting block is hinged to the lower ends of the two oblique supports 33, the upper ends of the two oblique supports are hinged to the two first reflective plates one by one, and the two first reflective plates are mirrors When the blade is clamped on the blade clamp, the width direction of the blade is the same as the distribution direction of the blade clamp, and the center line of the blade in the width direction is located on the same vertical plane as the horizontal hinge axis; the width of the blade clamped on the blade clamp is a blade 34 of a set maximum width, and the inclination angle of the first reflector is such that the reflected light 36 generated by the light 35 irradiated downward from the center line of the width direction of the blade onto the first reflector just intersects with the outer edge 37 of the widest part of the width direction of the blade, and the end 38 of the second reflector away from the first reflector is located above the horizontal plane, and the light 41 irradiated downward from the outer edge of the widest part of the width direction of the blade onto the first reflector is irradiated onto the connecting line of the first reflector and the second reflector.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A crop image acquisition device, comprising a leaf clamp arranged on a workbench and an image acquisition machine for acquiring images of leaves clamped by the leaf clamp, characterized in that: There are at least two blade clamps, and the workbench is provided with a plurality of anti-reflection mechanisms corresponding to the blades clamped by the blade clamps, and the anti-reflection mechanisms and the image acquisition machine are located on both sides of the blade; the blade clamp includes a heightening seat, and the blade clamp is connected to the workbench through the heightening seat; when the blade clamp clamps the blade and the blade is in a state parallel to the workbench, the blade is located above the anti-reflection mechanism, and the blade is spaced apart from the anti-reflection mechanism, and the blade clamp also includes an elastic connecting piece and a dynamic clamping piece, and one end of the dynamic clamping piece is connected to the upper surface of the heightening seat through the elastic connecting piece. On the surface, a clamping opening is formed between the other end of the movable clamping piece and the upper surface of the heightening seat, the elastic connecting piece is used to drive the movable clamping piece to close toward the heightening seat to set the clamping opening to close, the upper surface of the movable clamping piece is connected with one end of the crowbar, and the other end of the crowbar extends beyond the movable clamping piece toward the end away from the clamping opening, and a plurality of needle tips are provided on the portion of the movable clamping piece that constitutes the clamping opening, and the needle tips are distributed along the width direction of the clamping opening, and water outlet holes are provided in the needle tips, and a water inlet channel is provided in the movable clamping piece, and the outlet end of the water inlet channel is connected with the water outlet hole, and the inlet end of the water inlet channel is provided with a water inlet pipe, and the water inlet pipe is provided with a water inlet valve.

2. The crop image acquisition device according to claim 1, characterized in that: The anti-reflection mechanism is a black light-absorbing layer arranged on the workbench, and the black light-absorbing layers constituting all the anti-reflection mechanisms are connected together.

3. The crop image acquisition device according to claim 1, characterized in that: The invention also comprises a plurality of light sources which emit parallel light for irradiating the blades clamped by the blade clamps one by one, and the light emitted by the light sources is directed downward; all the blade clamps are arranged in the same straight line and located in the same horizontal plane, and the anti-reflection mechanism comprises a threaded vertical rod and two first reflective plates, one end of the two first reflective plates is hinged to the upper end of the threaded vertical rod through the same horizontal hinge shaft, and the other end of the first reflective plate is connected to the second reflective plate, the first reflective plate is perpendicular to the second reflective plate, the horizontal hinge shaft, the first reflective plate and the second reflective plate are parallel, the extension direction of the horizontal hinge shaft is perpendicular to the distribution direction of the blade clamps, the first reflective plate is located below the horizontal plane, the upper surface of the first reflective plate is a reflective surface, the upper surface of the second reflective plate is a reflective surface, and the upper surface of the threaded vertical rod A lifting block is threadedly connected, the lifting block is hinged to the lower ends of the two oblique supports, the upper ends of the two oblique supports are hinged to the two first reflectors in a one-to-one correspondence, and the two first reflectors are mirror-distributed on both sides of the threaded vertical rod; when the blade is clamped on the blade clamp, the width direction of the blade is the same as the distribution direction of the blade clamp, and the center line of the width direction of the blade and the horizontal hinge axis are located on the same vertical plane; the width of the blade clamped on the blade clamp is a blade of a set maximum width, and the inclination angle of the first reflector is such that the reflected light generated by the light irradiated downward from the center line of the width direction of the blade onto the first reflector just intersects with the outer edge of the widest part of the width direction of the blade, and the end of the second reflector away from the first reflector is located above the horizontal plane.

4. The crop image acquisition device according to claim 3, characterized in that: When the leaves are photographed by a camera, the crop image acquisition device is located in a dark room.

5. The crop image acquisition device according to claim 3, characterized in that: The light source includes an LED lamp bead and a convex lens located below the LED lamp bead, and the LED lamp bead is located at the focus of the convex lens.

6. The crop image acquisition device according to claim 1, 2, 3, 4 or 5, characterized in that: The clamping end of the movable clamp is provided with an outer curling edge, which forms an axial hole. One end of the crowbar is provided with a hook head, which is inserted into the axial hole to connect the crowbar with the movable clamp.

7. The crop image acquisition device according to claim 1, 2, 3, 4 or 5, characterized in that: The upper surface of the height-enhancing seat is a plane, and a supporting platform is provided on the lower surface of the dynamic clamping piece. A height-enhancing pad avoidance hole aligned with the supporting platform is provided on the upper surface of the height-enhancing seat, and a connecting column is provided on the bottom wall of the height-enhancing pad avoidance hole. A threaded hole is provided on the upper end surface of the connecting column, and the threaded hole is coaxial with the connecting column. The blade clamp also includes a supporting column, and a supporting column avoidance hole is provided on the lower end surface of the supporting column, and a threaded connector is provided on the bottom wall of the supporting column avoidance hole. The threaded connector is threadedly connected in the threaded hole, and the lower end of the supporting column is inserted into the threaded hole. The heightened pad is in the avoidance hole and is spaced apart from the avoidance hole of the heightened pad, and the upper end is supported on the support platform. The connecting column is inserted into the avoidance hole of the support column, and two scales are provided on the circumferential surface of the support column. The scale value of one scale increases from bottom to top, and the scale value of the other scale increases from top to bottom, and the zero scales of the two scales are aligned; when the threaded connector is screwed into the threaded hole to a maximum depth, the upper surface of the heightened pad is aligned with the zero scale, the clamp is in a closed state, and the support column is overlapped with the support platform.

Images