A device for investigating amphibian migration data

Abstract

The invention relates to the field of wildlife surveys, and discloses an amphibian migration data survey device, comprising: a base, on which a lifting platform is arranged, a lower channel is between the base and the lifting platform, the highest point of the lower channel horizontal height is not lower than the highest height of obstacles crossed by minors among survey objects, the invention provides a lower channel and an upper channel, so that minors of the survey objects can only pass through the lower channel, and measures are provided at the entrance of the lower channel to prevent adult individuals from entering, so that adult individuals are urged to pass through the upper channel, and images of the lower channel and the upper channel are respectively taken by a shooting component, such a design can completely distinguish between adult individuals and minors, and avoids the problem that minors are easily blocked by adult individuals outside the monitoring field of view when passing through a monitoring area, resulting in inability to be effectively identified, thereby causing a large deviation in the final survey data.

Description

Technical Field

[0001] The invention relates to the field of wildlife investigation, and in particular to an amphibian migration data investigation device. Background Art

[0002] In ecological research, the migration habits of amphibians play a key role in revealing species survival strategies, ecosystem dynamics and responses to climate change. Although the migration behavior of adults is often focused on, the migration of juveniles cannot be ignored because they may have unique migration purposes and characteristics, which are crucial to the continuation of populations.

[0003] Although a variety of survey methods have been applied to the study of amphibian migration, including line sampling, sampling, fence trap, etc., current unattended migration monitoring methods, such as photography, infrared triggered cameras and acoustic monitoring, face challenges in capturing the migration data of juvenile amphibians. Juvenile individuals are small in size and weak in voice, which makes it easy for them to be blocked from the monitoring field of view by adults when they pass through monitoring points during migration. In addition, the effectiveness of acoustic monitoring is also limited by the interference of environmental noise on the migration path. These technical limitations easily lead to the proportion of juvenile individuals in the survey data being underestimated, and the true face of amphibian migration cannot be fully reflected. Based on this, the present invention purposely provides an amphibian migration data survey device that can improve the accuracy of the data on the proportion of juvenile individuals in the migratory group. Summary of the invention

[0004] The purpose of the present invention is to provide an amphibian migration data survey device to address the deficiencies in the prior art, so as to solve the technical problem that in amphibian migratory groups, adult individuals easily cover minors in terms of shape, sound, etc., resulting in an underestimated proportion of minors.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An amphibian migration data survey device, comprising:

[0007] A base, on which a lifting platform is arranged, a lower passage is provided between the base and the lifting platform, the highest point of the lower passage is not lower than the highest height of obstacles crossed by minors among the surveyed subjects, an upper passage is provided above the lifting platform, a trapezoidal block is fixedly installed on the top surface of the lifting platform, a first shooting component is fixedly installed on the trapezoidal block, and a second shooting component is arranged on the trapezoidal block, the first shooting component and the second shooting component are both connected to a controller, the first shooting component is used to shoot an image at the exit of the lower passage, the second shooting component is used to shoot an image in the upper passage, the controller recognizes the images of the first shooting component and the second shooting component respectively, and records the number of individuals passing through the lower passage and the upper passage;

[0008] An extension platform is fixedly installed on the lifting platform, the extension platform is located between the lower channel and the upper channel, and is located at the entrance ends of the lower channel and the upper channel. A plurality of equally spaced railings are arranged at the bottom of the extension platform, the railings are located at the top of the lower channel, the lowest horizontal height of the railings is not higher than the lowest height of the adult individuals among the survey subjects, and the distance between two adjacent railings is less than the minimum lateral distance at the widest point of the adult individuals among the survey subjects.

[0009] As a further solution of the present invention: the lifting platform is slidably installed on the base, and is driven to rise and fall by a driving source fixedly installed on the base, and the second shooting component is slidably installed on the trapezoidal block. When the driving source drives the lifting platform to rise, the lifting platform drives the second shooting component to rise synchronously through the linkage component.

[0010] As a further solution of the present invention: each of the railings is slidably installed on the extension platform, and each of the railings is driven to move by a synchronous drive component, and the synchronous drive component is connected to a drive source. When the drive source drives the lifting platform to rise, the synchronous drive component drives the railing to move away from the entrance end of the lower channel, and the moving distance of the multiple railings decreases from the middle to both sides.

[0011] As a further solution of the present invention: the linkage assembly includes a movable rack plate, a second gear, a transmission shaft, a first gear and a fixed rack plate; a sliding frame is slidably installed in the trapezoidal block; the sliding frame is fixedly connected to the second shooting assembly; the movable rack plate is slidably installed in the trapezoidal block and is fixedly connected to the sliding frame; the second gear is rotatably installed on the top surface of the lifting platform, is located in the trapezoidal block, and is meshed with the movable rack plate; the first gear is rotatably installed on the bottom of the lifting platform; the transmission shaft is rotatably installed in the lifting platform, and is transmission-connected to the first gear and the fixed rack plate through two synchronous belts respectively; the fixed rack plate is fixedly installed on the base and is meshed with the first gear.

[0012] As a further solution of the present invention: each of the synchronous drive components includes a slider, a threaded rod, and a driving wheel. The slider is slidably installed on the extension platform and fixedly connected to the railing. The threaded rod is rotatably installed on the extension platform and threadedly connected to the slider. The driving wheel is rotatably installed in the extension platform and fixedly connected to the threaded rod. The two are coaxially arranged. Two adjacent driving wheels are connected by a synchronous belt transmission. The diameters of the multiple driving wheels increase from the middle to both sides. The driving wheel with the smallest diameter is driven to rotate by an output source. The output source is connected to the driving source.

[0013] As a further solution of the present invention: the outlet end of the upper channel and the outlet end of the lower channel are offset in horizontal position.

[0014] As a further solution of the present invention: a first partition is fixedly installed on the base, a second partition is fixedly installed on the bottom surface of the lifting platform, and the first partition is slidably connected to the second partition.

[0015] As a further solution of the present invention: an umbrella-shaped top cover is fixedly installed on the top of the trapezoidal block, and the projections of the first shooting component and the second shooting component on the horizontal plane of the bottom surface of the umbrella-shaped top cover are both located on the bottom surface of the umbrella-shaped top cover.

[0016] Beneficial effects of the present invention:

[0017] 1. In the present invention, by setting a lower channel and an upper channel, and making the highest point of the lower channel not lower than the highest height of the obstacles that the minors of the survey object can cross, the minors of the survey object can only pass through the lower channel, and setting measures to prevent adult individuals from entering at the entrance of the lower channel, so that adult individuals are urged to pass through the upper channel, and the first shooting component and the second shooting component are used to respectively shoot images of the lower channel and the upper channel. Such a design can completely distinguish between adult individuals and minors, and pass through different channels, thereby avoiding the problem that minors are easily blocked by adult individuals outside the monitoring field of view when passing through the monitoring area, resulting in inability to be effectively identified, and then resulting in a large deviation in the final survey data;

[0018] 2. In the present invention, the lifting platform can be controlled to rise and fall by the driving source, so that the space of the lower channel changes accordingly. When the driving source controls the lifting platform to rise and fall, the lifting platform will control the second shooting component to rise and fall synchronously through the linkage component, so that the second shooting component can be adjusted to a suitable position and keep shooting the image in the upper channel from top to bottom. In this way, it can accurately meet the needs of juvenile individuals of different species or different sizes of the same species. By querying the maximum jumping height of juvenile individuals of a specific species and adjusting the spatial height of the lower channel accordingly, the pertinence and effectiveness of the design are ensured, and the limitations and inconveniences caused by the fixed height are avoided;

[0019] 3. In the present invention, the outlet end of the upper channel and the outlet end of the lower channel are staggered in the horizontal position, so that the risk of adult individuals falling on the juvenile individuals below when returning to the ground from the upper channel can be avoided, thereby protecting the juvenile individuals and the animal individuals being investigated. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 The present invention Figure 1 Rear view structure diagram;

[0023] Figure 3 The present invention Figure 1 Schematic diagram of the structure viewed from above;

[0024] Figure 4 It is a structural schematic diagram of the base in the present invention;

[0025] Figure 5 It is a structural schematic diagram of the bottom of the lifting platform in the present invention;

[0026] Figure 6 It is a structural schematic diagram of the top surface of the lifting platform in the present invention;

[0027] Figure 7 It is a structural schematic diagram of the trapezoidal block in the present invention;

[0028] Figure 8 It is a structural schematic diagram of the sliding frame in the present invention;

[0029] Fig. 9 It is a structural schematic diagram of the linkage component in the present invention;

[0030] Fig.10 It is a schematic diagram of the structure of the driving wheel in the present invention;

[0031] Fig.11 It is a schematic diagram of the lifting platform in the present invention;

[0032] Fig.12 It is a schematic diagram of the movement of the railing in the present invention.

[0033] In the figure: 1. base; 2. lifting platform; 3. trapezoidal block; 4. lower channel; 5. upper channel; 6. first shooting component; 7. second shooting component; 8. driving source; 9. fixed rack plate; 10. first gear; 11. transmission shaft; 12. second gear; 13. movable rack plate; 14. sliding frame; 15. linkage component; 16. extension platform; 17. slider; 18. railing; 19. threaded rod; 20. driving wheel; 21. synchronous driving component; 22. first partition; 23. second partition; 24. umbrella-shaped top cover. DETAILED DESCRIPTION

[0034] 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.

[0035] See also Figure 1-Figure 12 As shown, the present invention is an amphibian migration data survey device, comprising:

[0036] A base 1, on which a lifting platform 2 is arranged, a lower channel 4 is provided between the base 1 and the lifting platform 2, the highest point of the lower channel 4 being not lower than the highest height of obstacles crossed by minors among the surveyed subjects, an upper channel 5 is provided above the lifting platform 2, a trapezoidal block 3 is fixedly installed on the top surface of the lifting platform 2, a first shooting component 6 is fixedly installed on the trapezoidal block 3, and a second shooting component 7 is arranged on the trapezoidal block 3, the first shooting component 6 and the second shooting component 7 are both connected to a controller, the first shooting component 6 is used to shoot an image at the exit of the lower channel 4, the second shooting component 7 is used to shoot an image in the upper channel 5, the controller respectively identifies the images of the first shooting component 6 and the second shooting component 7, and records the number of individuals passing through the lower channel 4 and the upper channel 5;

[0037] An extension platform 16 is fixedly installed on the lifting platform 2. The extension platform 16 is located between the lower channel 4 and the upper channel 5, and is located at the entrance ends of the lower channel 4 and the upper channel 5. A plurality of equally spaced railings 18 are provided at the bottom of the extension platform 16. The railings 18 are located at the top of the lower channel 4. The lowest horizontal height of the railings 18 is not higher than the lowest height of the adult individuals among the survey subjects, and the distance between two adjacent railings 18 is less than the minimum lateral distance at the widest point of the adult individuals among the survey subjects.

[0038] In one case of the present embodiment, the first shooting component 6 and the second shooting component 7 both include a camera, an angle adjustment component, an image processor, a storage unit, a signal transmission unit, etc., and the controller includes an image recognition algorithm, a processor, a memory, a database, etc. It should be noted that the above components are all prior arts, and the present invention does not improve them. Therefore, there is no need to disclose their specific mechanical structure and circuit structure, which does not affect the integrity of the present invention.

[0039] In actual application of this embodiment, the base 1 is placed on the migration path of amphibians to be investigated. When the survey subjects come to the base 1, they will be divided into two groups and pass through the lower channel 4 and the upper channel 5 respectively. The first shooting component 6 will take images of the exit of the lower channel 4, and the second shooting component 7 will take images of the upper channel 5. Then the controller recognizes the images of the first shooting component 6 and the second shooting component 7 respectively, and records the number of individuals passing through the lower channel 4 and the upper channel 5. The number can be added up to obtain the number of all survey subjects passing through the base 1.

[0040] The highest point of the horizontal height of the lower channel 4 is not lower than the highest height of the obstacles that the minors among the surveyed individuals can cross. Under normal circumstances, this means that the minors can only pass through the lower channel 4. In this way, the controller can roughly obtain the number of all the minors among the surveyed individuals passing through the base 1 through the image of the first shooting component 6. There are multiple railings 18 arranged at equal intervals on the top of the entrance of the lower channel 4, and the lowest point of the horizontal height of the railings 18 is not higher than the lowest height of the adult individuals among the surveyed individuals, and the distance between two adjacent railings 18 is less than the minimum lateral distance at the widest point of the adult individuals among the surveyed individuals, so that when the adult individuals among the surveyed individuals enter the lower channel 4, due to Its height and body width are limited by the railing 18, which makes it impossible for it to enter the lower channel 4, forcing the adult individuals to cross the lifting platform 2 and enter the upper channel 5, and pass through the base 1 from the upper channel 5. This design allows adult individuals and minors to pass through the base 1 from the upper channel 5 and the lower channel 4 respectively, so that accurate data can be obtained, that is, the specific number of minors and adult individuals of the survey subjects during the migration, and their respective proportions in the total number. This avoids the problem that minors are easily blocked from the monitoring field of view by adult individuals when passing through the base 1, resulting in the inability to be effectively identified, which in turn leads to a large deviation in the final survey data and fails to reflect the actual situation.

[0041] like Figure 1-Figure 12 As shown, as a preferred embodiment of the present invention, the lifting platform 2 is slidably installed on the base 1, and is driven to rise and fall by a driving source 8 fixedly installed on the base 1, and the second shooting component 7 is slidably installed on the trapezoidal block 3. When the driving source 8 drives the lifting platform 2 to rise, the lifting platform 2 drives the second shooting component 7 to rise synchronously through the linkage component 15.

[0042] In one case of this embodiment, the driving source 8 may be a hydraulic rod, an electric cylinder or other components, or other mechanisms capable of realizing lifting motion, which is not specifically limited in this embodiment.

[0043] In actual application of this embodiment, since there are many kinds of amphibians and there are differences in the body sizes of amphibians of the same species in different areas, after selecting the amphibian object to be investigated, the highest height of the minors in the object over the obstacle is queried, and then the lifting platform 2 can be controlled to rise and fall by the driving source 8, so that the space of the lower channel 4 is changed accordingly, so that the highest point of the horizontal height of the lower channel 4 is not lower than the highest height of the minors in the investigated object over the obstacle, so that the minors can only pass through the lower channel 4, and when the lifting platform 2 is raised and lowered, the horizontal height of the railing 18 is also raised and lowered synchronously, so that the adult individuals can also be restricted from entering the lower channel 4, thus ensuring that the minors and adult individuals in the investigated object are distinguished, and such a design can accurately meet the needs of minors of different species or different body sizes of the same species, by querying the maximum jumping height of minors of a specific species and adjusting the spatial height of the lower channel 4 accordingly, the pertinence and effectiveness of the design are ensured, and the limitations and inconveniences caused by the fixed height are avoided;

[0044] When the driving source 8 controls the lifting platform 2 to rise and fall, the lifting platform 2 will control the second shooting component 7 to rise and fall synchronously through the linkage component 15, so that the second shooting component 7 can be adjusted to a suitable position to keep shooting the image in the upper channel 5 from top to bottom.

[0045] like Figure 1-Figure 12 As shown, as a preferred embodiment of the present invention, each of the railings 18 is slidably installed on the extension platform 16, and each of the railings 18 is driven to move by a synchronous drive component 21, and the synchronous drive component 21 is connected to the drive source 8. When the drive source 8 drives the lifting platform 2 to rise, the synchronous drive component 21 drives the railing 18 to move away from the entrance end of the lower channel 4, and the moving distance of the multiple railings 18 decreases from the middle to both sides.

[0046] In practical application, if Figure 3 As shown in the figure, all the railings 18 are arranged at equal intervals along a straight line. When the driving source 8 drives the lifting platform 2 to rise, the size of the minors passing through the lower channel 4 increases, and the synchronous driving component 21 drives the railings 18 to move away from the entrance end of the lower channel 4, and the moving distances of the multiple railings 18 decrease from the middle to the sides. Fig.12 As shown in the example, the railings 18 distributed along a straight line are transformed into a "V" shape distribution. At this time, the distance between two adjacent railings 18 will become larger, thereby allowing larger minors to pass through. This can prevent minors from having to pass under the railings 18 because the distance between the railings 18 cannot be changed, which will block the minors from moving forward during the jump.

[0047] like Figure 1-Figure 9As shown, as a preferred embodiment of the present invention, the linkage assembly 15 includes a movable rack plate 13, a second gear 12, a transmission shaft 11, a first gear 10 and a fixed rack plate 9, a sliding frame 14 is slidably installed in the trapezoidal block 3, and the sliding frame 14 is fixedly connected to the second shooting assembly 7, the movable rack plate 13 is slidably installed in the trapezoidal block 3, and it is fixedly connected to the sliding frame 14, the second gear 12 is rotatably installed on the top surface of the lifting platform 2, it is located in the trapezoidal block 3, and it is meshed with the movable rack plate 13, the first gear 10 is rotatably installed at the bottom of the lifting platform 2, the transmission shaft 11 is rotatably installed in the lifting platform 2, and it is respectively connected to the first gear 10 and the fixed rack plate 9 through two synchronous belts, the fixed rack plate 9 is fixedly installed on the base 1, and it is meshed with the first gear 10.

[0048] In actual application of this embodiment, when the driving source 8 drives the lifting platform 2 to rise, the first gear 10, the transmission shaft 11 and the second gear 12 on the lifting platform 2 will rise synchronously, and the movable rack plate 13, the sliding frame 14 and the second shooting assembly 7 on the trapezoidal block 3 will also rise synchronously, and the first gear 10 is meshed with the movable rack plate 13, as shown in FIG. Fig. 9 Taking the example shown, when the first gear 10 rises, it will rotate counterclockwise under the action of the fixed rack plate 9, and it drives the transmission shaft 11 to rotate counterclockwise through the synchronous belt transmission action, and the transmission shaft 11 drives the second gear 12 to rotate counterclockwise synchronously through the synchronous belt, and the meshing relationship between the second gear 12 and the movable rack plate 13 will cause the movable rack plate 13 to move upward in the trapezoidal block 3, thereby causing the second shooting assembly 7 to rise; conversely, when the lifting platform 2 descends, the second shooting assembly 7 will also descend.

[0049] like Figure 1-Figure 10 As shown, as a preferred embodiment of the present invention, each of the synchronous drive components 21 includes a slider 17, a threaded rod 19, and a driving wheel 20. The slider 17 is slidably installed on the extension platform 16 and is fixedly connected to the railing 18. The threaded rod 19 is rotatably installed on the extension platform 16 and is threadedly connected to the slider 17. The driving wheel 20 is rotatably installed in the extension platform 16 and is fixedly connected to the threaded rod 19. The two are coaxially arranged. Two adjacent driving wheels 20 are connected by synchronous belt transmission. The diameters of the multiple driving wheels 20 increase from the middle to both sides. The driving wheel 20 with the smallest diameter is driven to rotate by an output source, and the output source is connected to the driving source 8.

[0050] In one case of this embodiment, the output source is arranged in the extension platform 16. The output source can be a servo motor, a servo motor and other components, and can also be other mechanisms capable of realizing rotational motion. This embodiment does not make any specific limitations here.

[0051] In actual application of this embodiment, the driving wheel 20 with the smallest diameter is driven to rotate by the output source, and the two adjacent driving wheels 20 are connected by a synchronous belt transmission, so all the driving wheels 20 will rotate, and the driving wheel 20 will drive the threaded rod 19 to rotate, and the slider 17 is driven to slide by the threaded rod 19, so that the railing 18 is moved, and the diameter of the driving wheel 20 increases from the middle to both sides, which means that the number of rotations of the driving wheel 20 decreases from the middle to both sides, and the railing 18 is essentially moved by the number of rotations of the driving wheel 20. The larger the number of rotations, the longer the moving distance, so the moving distance of multiple railings 18 decreases from the middle to both sides.

[0052] like Figure 2 As shown, as a preferred embodiment of the present invention, the outlet end of the upper channel 5 and the outlet end of the lower channel 4 are offset in horizontal position.

[0053] In actual application of this embodiment, since the adult individuals pass through the upper channel 5, and the upper channel 5 is located above the lower channel 4, the exit end of the upper channel 5 and the exit end of the lower channel 4 are staggered in the horizontal position. In this way, the risk of the adult individuals falling on the minors below when returning to the ground from the upper channel 5 can be avoided, thereby protecting the minors and the animal individuals being investigated.

[0054] like Figure 4-Figure 5 As shown, as a preferred embodiment of the present invention, a first partition plate 22 is fixedly mounted on the base 1, a second partition plate 23 is fixedly mounted on the bottom surface of the lifting platform 2, and the first partition plate 22 is slidably connected to the second partition plate 23.

[0055] In actual application of this embodiment, the design of the first partition 22 and the second partition 23 ensures that during the lifting process of the lifting platform 2, the first partition 22 and the second partition 23 can always form a partition, thereby guiding the minors to move to the exit end when passing through the lower channel 4, and preventing the minors from moving to the area between the base 1 and the lifting platform 2 that does not belong to the lower channel 4.

[0056] like Figure 1 As shown, as a preferred embodiment of the present invention, an umbrella-shaped top cover 24 is fixedly installed on the top of the trapezoidal block 3, and the projections of the first shooting component 6 and the second shooting component 7 on the horizontal plane of the bottom surface of the umbrella-shaped top cover 24 are both located on the bottom surface of the umbrella-shaped top cover 24.

[0057] In actual application of this embodiment, an umbrella-shaped top cover 24 is installed on the top of the trapezoidal block 3, and the first shooting component 6 and the second shooting component 7 are both located within the protection range of the umbrella-shaped top cover 24, thereby preventing rain and other falling objects from causing adverse effects on the first shooting component 6 and the second shooting component 7.

[0058] Working principle of the present invention: In the above embodiment, the present invention provides an amphibian migration data survey device, and the base 1 is placed on the amphibian migration path that needs to be surveyed. When the survey subjects come to the base 1, they will be divided into two groups and pass through the lower channel 4 and the upper channel 5 respectively. The first shooting component 6 will take the image at the exit of the lower channel 4, and the second shooting component 7 will take the image inside the upper channel 5. Then the controller will identify the images of the first shooting component 6 and the second shooting component 7 respectively, and record the number of individuals passing through the lower channel 4 and the upper channel 5. The sum of the numbers can be used to obtain the number of all survey subjects passing through the base 1.

[0059] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An amphibian migration data survey device, characterized in that: include: A base (1) is provided with a lifting platform (2) on it, a lower channel (4) is provided between the base (1) and the lifting platform (2), the highest point of the lower channel (4) being not lower than the highest height of obstacles that minors among the surveyed subjects can cross, an upper channel (5) is provided above the lifting platform (2), a trapezoidal block (3) is fixedly mounted on the top surface of the lifting platform (2), a first shooting component (6) is fixedly mounted on the trapezoidal block (3), and a second shooting component (7) is provided on the trapezoidal block, the first shooting component (6) and the second shooting component (7) are both connected to a controller, the first shooting component (6) is used to shoot an image at the exit of the lower channel (4), and the second shooting component (7) is used to shoot an image inside the upper channel (5), the controller respectively identifies the images of the first shooting component (6) and the second shooting component (7), and records the number of individuals passing through the lower channel (4) and the upper channel (5); An extension platform (16) is fixedly mounted on the lifting platform (2), the extension platform (16) is located between the lower channel (4) and the upper channel (5), and is located at the entrance ends of the lower channel (4) and the upper channel (5), a plurality of equally spaced railings (18) are arranged at the bottom of the extension platform (16), the railings (18) are located at the top of the lower channel (4), the lowest horizontal height of the railings (18) is not higher than the lowest height of an adult individual among the survey subjects, and the distance between two adjacent railings (18) is less than the minimum horizontal distance at the widest point of an adult individual among the survey subjects; The lifting platform (2) is slidably mounted on the base (1), and is driven to rise and fall by a driving source (8) fixedly mounted on the base (1); the second shooting component (7) is slidably mounted on the trapezoidal block (3); when the driving source (8) drives the lifting platform (2) to rise, the lifting platform (2) drives the second shooting component (7) to rise synchronously via the linkage component (15); Each of the railings (18) is slidably mounted on the extension platform (16), and each of the railings (18) is driven to move by a synchronous drive component (21). The synchronous drive component (21) is connected to a drive source (8). When the drive source (8) drives the lifting platform (2) to rise, the synchronous drive component (21) drives the railing (18) to move in a direction away from an entrance end of the lower channel (4), and the moving distances of the plurality of railings (18) decrease from the middle to both sides.

2. The amphibian migration data survey device according to claim 1, characterized in that: The linkage assembly (15) comprises a movable rack plate (13), a second gear (12), a transmission shaft (11), a first gear (10) and a fixed rack plate (9); a sliding frame (14) is slidably mounted in the trapezoidal block (3); the sliding frame (14) is fixedly connected to the second shooting assembly (7); the movable rack plate (13) is slidably mounted in the trapezoidal block (3) and is fixedly connected to the sliding frame (14); the second gear (12) is rotatably mounted on the top surface of the lifting platform (2) and is located in the trapezoidal block (3) and is meshed with the movable rack plate (13); the first gear (10) is rotatably mounted on the bottom of the lifting platform (2); the transmission shaft (11) is rotatably mounted in the lifting platform (2) and is respectively transmission-connected to the first gear (10) and the fixed rack plate (9) through two synchronous belts; the fixed rack plate (9) is fixedly mounted on the base (1) and is meshed with the first gear (10).

3. The amphibian migration data survey device according to claim 1, characterized in that: Each synchronous drive assembly (21) comprises a slider (17), a threaded rod (19), and a drive wheel (20); the slider (17) is slidably mounted on the extension platform (16) and fixedly connected to the railing (18); the threaded rod (19) is rotatably mounted on the extension platform (16) and threadedly connected to the slider (17); the drive wheel (20) is rotatably mounted in the extension platform (16) and fixedly connected to the threaded rod (19); the two are coaxially arranged; two adjacent drive wheels (20) are connected by synchronous belt transmission; the diameters of the plurality of drive wheels (20) increase from the middle to both sides; the drive wheel (20) with the smallest diameter is driven to rotate by an output source; and the output source is connected to the drive source (8).

4. The amphibian migration data survey device according to claim 1, characterized in that: The outlet end of the upper channel (5) and the outlet end of the lower channel (4) are offset in horizontal position.

5. The amphibian migration data survey device according to claim 1, characterized in that: A first partition plate (22) is fixedly mounted on the base (1), a second partition plate (23) is fixedly mounted on the bottom surface of the lifting platform (2), and the first partition plate (22) is slidably connected to the second partition plate (23).

6. The amphibian migration data survey device according to claim 1, characterized in that: An umbrella-shaped top cover (24) is fixedly mounted on the top of the trapezoidal block (3), and the projections of the first shooting component (6) and the second shooting component (7) on the horizontal plane of the bottom surface of the umbrella-shaped top cover (24) are both located on the bottom surface of the umbrella-shaped top cover (24).

Images