Animal behavior observation device

Abstract

This utility model relates to the field of animal experimental technology and provides an animal behavior observation device, comprising: a transparent platform having opposing first and second planes; the first plane for supporting the animal to be observed; a cover detachably connected to the transparent platform, the cover having an open state and a closed state relative to the transparent platform; in the open state, the cover is separated from the transparent platform; in the closed state, the inner surface of the cover and the first plane form an observation cavity to constrain the range of motion of the animal to be observed; a reflector having opposing mirror surface and back surface; the mirror surface facing the second plane; and a support assembly including N support members, where N is a positive integer greater than 2; each support member having opposing first and second ends; the first end connecting to the second plane; and the second end connecting to the mirror surface; the support assembly is used to maintain a gap between the reflector and the transparent platform. This device is used to achieve continuous and undisturbed display of the animal's feet and abdomen.

Description

Technical Field

[0001] This utility model relates to the field of animal experimental technology, and in particular to an animal behavior observation device. Background Technology

[0002] Among related technologies, observing animal behavior is a fundamental and important experimental method. When studying animal movement patterns, gait characteristics, tactic responses, or neural regulation mechanisms, it is often necessary to record the animal's overall behavioral trajectory and obtain fine motor information of its feet, abdomen, or ventral body to analyze appendage coordination, grasping behavior, and movement posture regulation mechanisms.

[0003] However, since invertebrates and reptiles typically crawl on platform surfaces with their feet, abdomens, or ventral sides facing downwards, they are easily obscured by their bodies or the platform, making it difficult for conventional top-view imaging methods to capture details of their bottom movements. Flipping the animal over for filming introduces human interference. Furthermore, animals often struggle after being flipped, making it difficult to maintain a stable posture, thus hindering continuous and stable observation of the animal's feet and abdomen.

[0004] Therefore, there is an urgent need for an animal behavior observation device to improve the above problems. Utility Model Content

[0005] This invention provides an animal behavior observation device for continuous and undisturbed display of an animal's feet and abdomen.

[0006] According to a first aspect of the present invention, an animal behavior observation device is provided, comprising: a transparent platform having opposing first and second planes; the first plane for supporting an animal to be observed; a cover detachably connected to the transparent platform, the cover having an open state and a closed state relative to the transparent platform; in the open state, the cover is separated from the transparent platform; in the closed state, the inner surface of the cover and the first plane form an observation cavity to constrain the range of motion of the animal to be observed; a reflector having opposing mirror surface and back surface; the mirror surface facing the second plane; and a support assembly including N support members, where N is a positive integer greater than 2; each support member having opposing first and second ends; the first end connecting to the second plane; the second end connecting to the mirror surface; and the support assembly for maintaining a gap between the reflector and the transparent platform.

[0007] In one embodiment, the device further includes a display stand and a rotating shaft, the beginning of which is rotatably connected to the display stand, and the end of which is connected to the back of the reflector; the extension direction of the rotating shaft is perpendicular to the mirror surface; the rotating shaft is used to drive the reflector, support assembly, transparent platform and cover to rotate together relative to the display stand.

[0008] In one embodiment, the device further includes at least one baffle disposed within the observation cavity to separate at least one motion area within the observation cavity.

[0009] In one embodiment, the baffle is movably connected to a first plane of the transparent platform; at least one baffle forms a two-dimensional maze structure on the transparent platform.

[0010] In one embodiment, the baffle has a vertical ridge and / or axis that are perpendicular to the first plane.

[0011] In one embodiment, the transparent platform is further provided with a magnetic metal component, and the baffle is magnetically attracted to the magnetic metal component.

[0012] In one embodiment, the baffle is a transparent baffle; the transparent baffle connects the first plane and / or the inner surface of the housing, and at least one transparent baffle forms a three-dimensional labyrinth structure within the observation cavity.

[0013] In one embodiment, the support members are symmetrically distributed about the center of the rotation axis.

[0014] In one embodiment, the area of ​​the first end of the support member is smaller than the area of ​​the second end of the support member, so that the second plane is supported and the area of ​​the second plane that is blocked by the support member is reduced.

[0015] In one embodiment, the inner surface of the cover is a smooth curved surface; the cover is a transparent cover.

[0016] In one embodiment, the cover is configured as a hemispherical shell, and the inner surface of the cover is a hemispherical surface.

[0017] In one embodiment, the device further includes a camera unit fixed to the display stand for capturing images of the animal to be observed through the transparent platform.

[0018] In one embodiment, the camera unit faces the mirror to capture images transmitted through the transparent platform and reflected by the mirror.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting a reflector, a transparent platform and a support component for maintaining the gap between the two, an observation light path is formed at the bottom of the observation cavity, so that the observer can observe the soles of the feet or abdomen of the animal in a free movement state without turning the animal over. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an animal behavior observation device according to an exemplary embodiment.

[0021] Figure 2This is a schematic diagram of an animal behavior observation device equipped with a fan, a water pump and a camera unit, according to an exemplary embodiment.

[0022] Figure 3 This is a three-dimensional structural diagram of an animal behavior observation device with a C-shaped maze structure, according to an exemplary embodiment.

[0023] Figure 4 This is a schematic diagram of an animal behavior observation device with an S-shaped maze structure, according to an exemplary embodiment.

[0024] Figure 5 This is a schematic diagram of an animal behavior observation device with a T-shaped maze structure, according to an exemplary embodiment.

[0025] Figure 6 This is a schematic diagram of an animal behavior observation device with a grid maze structure, according to an exemplary embodiment.

[0026] Figure 7 This is a schematic diagram of an animal behavior observation device with a radial maze structure, according to an exemplary embodiment.

[0027] Explanation of the reference numerals in the figure: 1. Housing; 2. Transparent platform; 3. Baffle; 4. Support components; 5. Reflector; 6. Display stand; 7. Camera unit; 11. Ventilation hole; 12. Drainage hole; 13. Fan; 14. Water pump; 21. First plane; 22. Second plane; 23. Magnetic metal part; 24. Fixture; 25. Gap; 51. Mirror surface; 52. Back side; 61. Rotating shaft; 71. First camera; 72. Second camera. Detailed Implementation

[0028] Unless otherwise defined, the technical or scientific terms used in this specification shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. Specific embodiments of this invention will be described below with reference to the accompanying drawings. It should be noted that, in order to provide a concise description, this specification cannot provide a detailed description of all features of the actual embodiments. Without departing from the spirit and scope of this invention, those skilled in the art can make modifications and substitutions to the embodiments of this invention, and the resulting embodiments are also within the protection scope of this invention.

[0029] like Figure 1As shown, one embodiment of this utility model provides an animal behavior observation device, including: a transparent platform 2 having a first plane 21 and a second plane 22 facing each other; the first plane 21 is used to support the animal to be observed; a cover 1 detachably connected to the transparent platform 2, the cover 1 having an open state and a closed state relative to the transparent platform 2; in the open state, the cover 1 is separated from the transparent platform 2; in the closed state, the inner surface of the cover 1 and the first plane 21 form an observation cavity to constrain the range of motion of the animal to be observed; a reflector 5 having a mirror surface 51 and a back surface 52 facing each other; the mirror surface 51 faces the second plane 22; a support assembly 4 including N support members, where N is a positive integer greater than 2; each support member has a first end and a second end facing each other; the first end is connected to the second plane 22; the second end is connected to the mirror surface 51; the support assembly 4 is used to maintain a gap 25 between the reflector 5 and the transparent platform 2.

[0030] In some specific embodiments, the transparent platform 2 is a tempered glass plate, which has good optical transparency, mechanical strength and chemical stability, and is suitable for stable support and clear imaging in long-term experimental environments.

[0031] In some examples, the transparent platform 2 has a transparency of 90% or more under visible light at a wavelength of 550 nm.

[0032] In other specific embodiments, the distance between the first plane 21 and the second plane 22, i.e., the thickness of the transparent platform 2, is in the range of 3-20 mm. In some examples, the thickness of the transparent platform 2 is 3 mm. In other examples, the thickness of the transparent platform 2 is 8 mm. In still other examples, the thickness of the transparent platform 2 is 20 mm.

[0033] More specifically, the back surface 52, the mirror surface 51, the second plane 22, and the first plane 21 are parallel to each other and arranged sequentially along the Z direction. The first plane 21 extends along the X and Y directions, and the X, Y, and Z directions are perpendicular to each other. In some examples, the Z direction is vertically upward.

[0034] In some specific embodiments, both the inner and outer surfaces of the cover 1 are smooth curved surfaces; the cover 1 is a transparent cover 1. In some examples, the cover 1 is hemispherical, and its inner surface is a hemispherical surface. In other examples, the cover 1 is semi-ellipsoidal, and its inner surface is a semi-ellipsoidal surface. In still other examples, the cover 1 is cylindrical, and its inner surface is a cylindrical surface.

[0035] It is worth noting that by setting both the inner and outer surfaces of the cover 1 to be smooth curved surfaces without sharp edges or stepped structures, it is possible to effectively prevent light from scattering, diffraction, or unexpected reflection during propagation, thereby improving the clarity and geometric fidelity of the image obtained from above the transparent platform 2.

[0036] In some specific embodiments, the housing 1 is made of an optical-grade polymer plate. The optical-grade polymer plate is a polycarbonate (PC) plate or a polymethyl methacrylate (PMMA) plate.

[0037] In some specific embodiments, the light transmittance of the cover 1 is greater than or equal to 90%. In some examples, the light transmittance of the cover 1 is 90%. In other examples, the light transmittance of the cover 1 is 91%. In still other examples, the light transmittance of the cover 1 is 92%.

[0038] In some possible embodiments, the distance from the inner surface to the outer surface of the housing 1, i.e., the thickness of the housing 1, is in the range of 3-5 mm. In some examples, the thickness of the housing 1 is 3 mm. In other examples, the thickness of the housing 1 is 4 mm. In still other examples, the thickness of the housing 1 is 5 mm.

[0039] It is worth noting that the thickness of the cover 1 and the thickness of the transparent platform 2 can be determined based on the weight of the contents of the observation cavity. The greater the weight of the contents of the observation cavity, the greater the thickness of the cover 1 and the thickness of the transparent platform 2. The contents of the observation cavity include the animal to be observed and the animal's living environment.

[0040] In some examples, the animal to be observed is an insect, such as a cockroach, whose living environment is air, and the contents of the observation cavity include the insect and air. In other examples, the animal to be observed is an amphibian, such as a toad, whose living environment is air and fresh water, and the contents of the observation cavity include the amphibian, air, and fresh water.

[0041] In a further embodiment, the housing 1 is provided with a ventilation hole 11 and a water passage hole 12. The ventilation hole 11 is used to connect the observation chamber to the atmosphere. The water passage hole 12 is used to connect the observation chamber to a water source. The water source is fresh water or seawater.

[0042] like Figure 2 As shown, the ventilation hole 11 is connected to the fan 13 for filling the observation chamber with air. The water inlet 12 is connected to the water pump 14 for filling the observation chamber with water.

[0043] By setting up ventilation holes 11 and water passage holes 12, this device can support the observation needs of terrestrial insects, amphibians, and even some aquatic organisms, expanding the application range of the equipment and making it suitable for multidisciplinary research such as ecology, behavior, and toxicology.

[0044] In other possible embodiments, the reflectivity of the mirror 51 is greater than or equal to 95%. In some examples, the reflectivity of the mirror 51 is 95%. In other examples, the reflectivity of the mirror 51 is 96%. In still other examples, the reflectivity of the mirror 51 is 97%.

[0045] In some other possible embodiments, the distance from the first end to the second end of the support component 4, i.e., the height of the support component 4, is greater than or equal to 10 mm. In some examples, the height of the support component 4 is 10 mm. In other examples, the height of the support component 4 is 15 mm. In still other examples, the height of the support component 4 is 20 mm.

[0046] It is worth noting that increasing the height of the support component 4 can improve its natural frequency, reduce the risk of external vibrations being transmitted to the observation cavity or camera unit 7, and is suitable for high frame rate imaging or micro-animal behavior monitoring scenarios, thereby improving image clarity.

[0047] In some embodiments, the device further includes a display stand 6 and a rotating shaft, the beginning of which is rotatably connected to the display stand 6, and the end of which is connected to the back surface 52 of the reflector 5; the extending direction of the rotating shaft is perpendicular to the mirror surface 51; the rotating shaft is used to drive the reflector 5, the support assembly 4, the transparent platform 2 and the cover 1 to rotate together relative to the display stand 6.

[0048] In some specific embodiments, a motor is located at the center of the display stand 6, and the rotating shaft is the main shaft of the motor. When the motor is powered on, it provides rotational force to the rotating shaft. In some examples, the motor rotates at a speed of 0.5-2 rpm to generate centrifugal force to stimulate the natural movement behavior of insects.

[0049] In other specific embodiments, a bearing is provided at the center of the display platform 6. The bearing has an inner ring and an outer ring arranged concentrically, and the inner ring and the outer ring are rotatably connected by ball bearings. The outer ring is fixedly connected to the display platform 6, and the rotation shaft is fixedly connected to the inner ring. When a tangential rotational force is applied to at least one of the reflector 5, the support assembly 4, the transparent platform 2, and the cover 1, the reflector 5, the support assembly 4, the transparent platform 2, and the cover 1 rotate together relative to the display platform 6 to achieve multi-angle observation of the animal to be observed. The tangential rotational force is perpendicular to the rotation shaft and does not pass through the center of the rotation shaft.

[0050] In some embodiments, the device further includes at least one baffle 3 disposed within the observation cavity, which is used to separate at least one motion area within the observation cavity.

[0051] In some specific embodiments, the baffle 3 is movably connected to the first plane 21 of the transparent platform 2; at least one of the baffles 3 forms a two-dimensional maze structure on the transparent platform 2.

[0052] In some specific embodiments, the two-dimensional maze structure includes at least one of the following: C-shaped maze, S-shaped maze, T-shaped maze, spiral maze, grid maze, and radial maze.

[0053] like Figure 3 As shown, in some examples, the C-shaped maze structure is composed of multiple concentrically arranged arc-shaped baffles 3. The movement area within the C-shaped maze structure includes multiple arc-shaped passages.

[0054] like Figure 4 As shown, in other examples, the S-shaped maze structure is composed of multiple parallel baffles 3. The movement area within the S-shaped maze structure is a channel extending in an S-shape.

[0055] like Figure 5 As shown in some examples, the motion area within the T-shaped maze structure consists of multiple cascaded T-shaped sub-motion areas, each with one entrance and two exits. The exit of the preceding sub-motion area connects to the entrance of the following sub-motion area.

[0056] In some other examples, the spiral maze structure is composed of spiral-shaped baffles. The movement area within the spiral maze structure is a movement area that extends in a spiral shape.

[0057] like Figure 6 As shown, in some other examples, the grid maze structure consists of an array of M*M baffles 3, where M is a positive integer greater than 1. The movement area within the grid maze structure has channels that intersect along the X and Y directions.

[0058] like Figure 7 As shown, in some possible examples, the baffles 3 of the radial maze structure are centrally symmetrically distributed radially with the geometric center of the transparent platform 2 as the origin. The movement areas in the radial maze structure extend radially from the center point, forming multiple branch channels.

[0059] In some embodiments, the baffle 3 has a vertical ridge and / or axis that are perpendicular to the first plane 21.

[0060] In some specific embodiments, the baffle 3 is prismatic, and the intersection of its sides forms the vertical ridge line, which is perpendicular to the first plane 21 along the Z direction.

[0061] In other specific embodiments, the baffle 3 is a cylinder, one bottom surface of the cylinder is located on the first plane 21, and the axis of the cylinder is perpendicular to the first plane 21 along the Z direction.

[0062] It is worth noting that the baffle 3 can have both a vertical ridge and an axis, as long as the direction of the vertical ridge and the axis are both perpendicular to the first plane 21.

[0063] like Figure 3 As shown, in some embodiments, the transparent platform 2 is further provided with a magnetic metal part 23, and the baffle 3 is magnetically attracted to the magnetic metal part 23.

[0064] In some specific embodiments, the magnetic metal parts 23 are arranged in a grid or distributed in a dot matrix on the surface of the transparent platform 2 to adapt to the arrangement requirements of the baffles 3 in different maze structures.

[0065] In other specific embodiments, a magnet is fixed to one end of the baffle 3 facing the first plane 21. The magnet is used to attract the magnetic metal part 23.

[0066] In some other specific embodiments, the baffle 3 is made of magnet.

[0067] It is worth noting that in some embodiments, the transparent platform 2, the cover 1, and the baffle 3 all meet food-grade safety requirements to improve the eco-friendliness and biosafety of the device.

[0068] In another embodiment, the transparent platform 2 is provided with clamps 24 for clamping and fixing the baffle 3. In some examples, multiple clamps 24 are respectively clamped at different positions of the baffle 3, causing it to bend and deform between adjacent clamps 24.

[0069] In some embodiments, the baffle 3 is a transparent baffle; the transparent baffle connects the first plane 21 and / or the inner surface of the cover 1, and at least one transparent baffle forms a three-dimensional maze structure in the observation cavity.

[0070] In some specific embodiments, the three-dimensional maze structure is formed based on a stacked architecture of multiple two-dimensional maze structures. Each layer of the two-dimensional maze structure has an independent path design, and adjacent layers are connected by vertical channels to achieve continuous connectivity within the three-dimensional space. The vertical channels extend along the Z-direction.

[0071] It is worth noting that the aforementioned two-dimensional and three-dimensional maze structures can be used for behavioral studies of animals under observation, learning ability testing, spatial memory experiments, and neuroscience experiments.

[0072] In some embodiments, the support members are symmetrically distributed about the center of the rotation axis.

[0073] In some specific embodiments, the rotation axis extends along the Z-direction. In other specific embodiments, the support is a silicone foot.

[0074] In some specific embodiments, the distance between the first end and the second end, i.e., the height of the support member, is in the range of 10-20 mm. In some examples, the height of the support member is 10 mm. In other examples, the height of the support member is 15 mm. In still other examples, the height of the support member is 20 mm.

[0075] In a further embodiment, the area of ​​the first end of the support member is smaller than the area of ​​the second end of the support member, so that the second plane is supported and the area of ​​the second plane 22 that is blocked by the support member is reduced.

[0076] In some examples, the support member is arranged in an upright cone shape, with the first end being the vertex of the cone and the second end being the base of the cone. This design ensures that the support component 4 stably supports the second plane 22, and the second plane 22 only contacts the vertex, which helps to prevent the support component 4 from obstructing the view of the transparent platform 2 through the gap 25.

[0077] like Figure 2 As shown, in some embodiments, the device further includes a camera unit 7, which is fixed to the display stand 6; the light-receiving optical path of the camera unit 7 passes sequentially through the transparent platform 2 and the gap 25 to capture images containing the animal to be observed.

[0078] In some specific embodiments, the camera unit 7 faces the mirror 51, and the light-receiving optical path of the camera unit 7 passes sequentially through the transparent platform 2 and the gap 25, and is reflected by the mirror 51. The camera unit 7 supports a magnification of 10-40x, which can be flexibly adjusted according to the size and detail requirements of the observed object. It is suitable for a wide range of applications, from macroscopic behavior monitoring to microscopic structure analysis, improving experimental accuracy and data richness.

[0079] It is worth noting that the camera unit 7 is configured as a complementary metal-oxide-semiconductor image sensor (CMOS), an infrared camera, or an industrial camera.

[0080] In some specific embodiments, the camera unit 7 is a first camera 71; the first camera 71 is fixed to the display stand 6 and faces the area where the transparent platform 2 is located, and is used to continuously take pictures of the animal to be observed in the observation cavity through the transparent platform 2 to obtain image data of its behavior trajectory, movement posture or interaction behavior.

[0081] In other specific embodiments, the imaging unit 7 is a second camera 72; the optical axis of the second camera 72 is oriented towards the mirror 51 located below or to the side of the transparent platform 2, and is used to capture the image transmitted through the transparent platform 2 and reflected by the mirror 51. This optical path design allows the imaging unit 7 to achieve multi-angle imaging of the observation cavity without being directly below or above the observation area, effectively saving space and improving the integration of the device.

[0082] It is worth noting that the images obtained through the transparent platform 2 include the abdomen and soles of the animal being observed. Combined with multi-camera setups, simultaneous multi-directional observation can be achieved. When the second camera 72 captures images transmitted through the transparent platform 2 and reflected by the mirror 51, the obtained field of view is wider than when the first camera 71 directly images through the transparent platform 2.

[0083] In some specific embodiments, the system also includes a supplementary lighting unit for illuminating the transparent platform 2 to improve the contrast between the animal being observed and the background of the observation cavity, thereby optimizing image quality. The supplementary lighting unit works in conjunction with the camera unit 7 to support bright-field, dark-field, or backlit imaging modes.

[0084] In some specific embodiments, the supplemental lighting unit is a visible light source or an infrared light source. It is worth noting that infrared light sources are suitable for low-light or nighttime imaging, avoiding interference with animal behavior.

[0085] In some embodiments, the ratio of the height of the support member to the size of the first plane 21 is greater than or equal to a preset ratio, so that the field of view of the camera unit 7 completely covers the first plane.

[0086] In some examples, the preset ratio is set according to the parameters of the camera unit 7. With this setting, the camera unit 7 can capture the complete movement trajectory of the animal being observed without moving relative to the transparent platform 2.

[0087] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0088] The above description of the embodiments is intended to enable those skilled in the art to understand and apply the present invention. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without creative effort. Therefore, the present invention is not limited to the embodiments described herein, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope and spirit of the present invention are within the scope of the present invention.

Claims

1. An animal behavior observation device, characterized by, include: A transparent platform having a first plane and a second plane; the first plane is used to support the animal to be observed. A cover is detachably connected to the transparent platform, and the cover has an open state and a closed state relative to the transparent platform; in the open state, the cover is separated from the transparent platform. In the closed state, the inner surface of the cover and the first plane form an observation cavity to restrict the range of motion of the animal to be observed; A reflector having opposing mirror surfaces and back surfaces; the mirror surfaces facing the second plane; The support components consist of N support parts, where N is a positive integer greater than 2; Each support has a first end and a second end; the first end is connected to the second plane; the second end is connected to the mirror surface; the support assembly is used to maintain a gap between the reflector and the transparent platform.

2. The apparatus of claim 1, wherein, The device also includes a display stand and a rotating shaft. The beginning of the rotating shaft is rotatably connected to the display stand, and the end of the rotating shaft is connected to the back of the reflector. The extension direction of the rotating shaft is perpendicular to the mirror surface. The rotating shaft is used to drive the reflector, support assembly, transparent platform and cover to rotate together relative to the display stand.

3. The apparatus of claim 1, wherein, The device further includes at least one baffle, which is disposed inside the observation cavity and is used to separate at least one motion area in the observation cavity.

4. The apparatus of claim 3, wherein, The baffle is movably connected to the first plane of the transparent platform; at least one of the baffles forms a two-dimensional maze structure on the transparent platform.

5. The apparatus of claim 4, wherein, The baffle has a vertical ridge and / or axis, which are perpendicular to the first plane.

6. The apparatus of claim 4 or 5, wherein, The transparent platform is also equipped with a magnetic metal component, and the baffle is magnetically attracted to the magnetic metal component.

7. The apparatus of claim 3, wherein, The baffle is a transparent baffle; the transparent baffle connects the first plane and / or the inner surface of the cover, and at least one of the transparent baffles forms a three-dimensional maze structure in the observation cavity.

8. The apparatus of claim 2, wherein, The support members are symmetrically distributed about the center of the rotation axis.

9. The apparatus of claim 8, wherein, The area of ​​the first end of the support member is smaller than the area of ​​the second end of the support member, so that the second plane is supported and the area of ​​the second plane that is blocked by the support member is reduced.

10. The apparatus of claim 1, wherein, The inner surface of the cover is a smooth curved surface; the cover is a transparent cover.

11. The apparatus of claim 10, wherein, The cover is hemispherical in shape, and the inner surface of the cover is hemispherical.

12. The apparatus of claim 2, wherein, The device also includes a camera unit fixed to the display stand; the light-receiving optical path of the camera unit passes sequentially through the transparent platform and the gap to capture images containing the animal to be observed.

13. The apparatus of claim 12, wherein, The camera unit faces the mirror, and the light path of the camera unit passes through the transparent platform and the gap in sequence, and is reflected by the mirror.

14. The apparatus of claim 12 or 13, wherein, The ratio of the height of the support member to the size of the first plane is greater than or equal to a preset ratio, so that the field of view of the camera unit completely covers the first plane.

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