Erosion gully erosion volume measuring device

Abstract

The invention provides an erosion gully erosion volume measuring device, and relates to the technical field of water and soil loss monitoring equipment.The erosion gully erosion volume measuring device comprises a three-dimensional laser scanner, an installation flange is fixedly installed at the lower end of the three-dimensional laser scanner, a controller and an installation disc are fixedly installed at the upper end of the three-dimensional laser scanner, and first inner grooves are symmetrically formed in the side wall of the installation disc; a rotating drum is rotatably mounted in the two first inner grooves, circular grooves are uniformly formed in the upper end of the rotating drum at equal intervals, a first spring is fixedly mounted in each circular groove, a clamping block is fixedly mounted at the upper end of each first spring, and each clamping block is slidably mounted in the corresponding circular groove; a first window, a second window, a third window and a fourth window are evenly installed in the rotating drum at equal intervals, the four types of windows cover the typical environment of erosion gully measurement by 90% or above, the laser light transmittance in any scene is ensured, point cloud noise, data cavities or precision deviation caused by environment interference are reduced from the source, and the measurement accuracy is improved. And the reliability of measurement results is ensured.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of soil and water loss monitoring equipment, more specifically, relates to an erosion volume measuring device for erosion gully. BACKGROUND

[0002] Soil and water loss is not only the main cause of land productivity degradation, but also the main source of river sediment and non-point source pollution of water body. Severe soil and water loss leads to reduction of arable land and degradation of land productivity, and even fundamental destruction of land productivity, which poses a serious threat to agricultural development, people's life and survival, and is one of the global disasters affecting the environment and development. Erosion gully is a gully structure formed on the slope surface after the mountain slope surface is destroyed, and is a performance type of extreme development of water erosion. The research on the erosion dynamics process of erosion gully cannot be carried out without the measurement of the morphological parameters of the erosion gully. The volume of the erosion gully not only reflects the amount of soil erosion, but also reflects the characteristics of the erosion gully. It is a very important parameter in the research on the erosion gully.

[0003] At present, an erosion volume measuring device for erosion gully exists at least the following technical problems: 1. The existing three-dimensional laser scanner lens window structure is single, lacks the adaptability to the diversified environment in the erosion gully measurement, is easy to cause the light transmittance to drop and the laser transmission to attenuate due to the environmental interference, and then causes the point cloud noise to increase, the data void and the precision deviation, and it is difficult to guarantee the measurement reliability in the complex scene; 2. The erosion gully measurement is mostly carried out in summer strong light or industrial high-temperature environment, and the continuous work of the equipment is easy to cause the performance attenuation of the laser module and the sensor (such as laser wavelength drift, distance measurement error increase) due to internal heat accumulation, but the traditional heat dissipation structure is mostly fixed heat dissipation hole, and when it is opened, there is no effective dustproof filter, and dust and sand particles are easy to invade the internal equipment with air flow, causing lens pollution or circuit short circuit and other problems; 3. The erosion gully terrain is complex, and the sunlight incidence angle is variable. The traditional shading structure is difficult to accurately block the oblique incidence of the diffuse reflection light, causing the lens internal stray light interference, and it is difficult to flexibly adjust according to the sunlight angle, easy to appear the sensor oversaturation of the sunny side, and the detail loss of the shady side, affecting the integrity of the point cloud data and the authenticity of the color information. SUMMARY

[0004] In order to solve the above technical problems, the present application provides an erosion volume measuring device for erosion gully, to solve the problem that the existing equipment lacks the adaptability to the diversified environment in the erosion gully measurement, is easy to cause the light transmittance to drop and the laser transmission to attenuate due to the environmental interference, and then causes the point cloud noise to increase, the data void and the precision deviation, and it is difficult to guarantee the measurement reliability in the complex scene.

[0005] The utility model provides an erosion groove erosion volume measuring device, including three -dimensional laser scanner, the lower end of three -dimensional laser scanner fixed mounting has installation flange, the upper end of three -dimensional laser scanner fixed mounting has controller and mounting disc, the lateral wall of mounting disc is symmetrically opened with first inner groove, two first inner grooves are rotatably installed with rotating drum, the upper end of rotating drum is evenly opened with circular groove, and every circular groove is fixedly installed with first spring, and every first spring is fixedly installed with clamping block, and every clamping block is slidably installed in every circular groove, and the inside of rotating drum is evenly installed with first window, second window, third window and fourth window, and the combination of rotating drum and multi-window and clamping block positioning structure realize the quick, accurate switching of different environment adaptation window, guarantee the laser light transmission stability under the diversified erosion groove scene.

[0006] Preferably, an arc-shaped groove is formed in the interior of the mounting disc, two groups of internal thread strips are symmetrically fixedly installed on the lateral wall of the mounting disc, a protective strip is fixedly installed on the lower group of internal thread strips, a laser emitting head is fixedly installed on the mounting disc, a heat dissipation groove is formed in the lateral wall of the mounting disc, a filter screen is fixedly installed in the heat dissipation groove, a positioning screw is threadedly installed on the upper end of the mounting disc, cleaning cotton is fixedly installed on the lateral wall of the mounting disc away from the laser emitting head, a protective cover is fixedly installed on the lateral wall of the mounting disc, a clamping groove adapted to the clamping block is formed in the inner wall of the protective cover and the mounting disc, a second inner groove is formed in the interior of the protective cover, and the rotating drum is rotatably installed in the second inner groove. By integrating the arc-shaped groove adjustment, the protective strip protection, the filter screen filtering in the heat dissipation groove, and the cleaning function of the cleaning cotton, the light path stability, the equipment protection, and the window cleaning are taken into account, and the influence of environmental interference on the measurement accuracy is reduced.

[0007] Preferably, a threaded ring is threadedly installed in the inner wall of the two groups of internal thread strips, a sliding groove is formed in the threaded ring, a sliding rod is slidably installed in the sliding groove, a cleaning piece is fixedly installed on the lateral wall of the sliding rod, the cleaning piece is attached to the filter screen, a circular ring is fixedly installed on the side of the sliding rod away from the cleaning piece, a second spring is fixedly installed on the circular ring at equal intervals, and one end of the second spring away from the circular ring is fixedly connected with the threaded ring. The threaded ring controls the opening and closing of the heat dissipation groove, and the cleaning piece driven by the spring synchronously cleans the filter screen, taking into account the heat dissipation demand and dustproof filtering, and avoiding the performance degradation caused by the blockage of the filter screen.

[0008] Preferably, an optical shield is slidably installed in the arc-shaped groove, a honeycomb hole is formed in the inner wall of the optical shield, the diameter of the honeycomb hole gradually decreases from the outside to the inside, a micro-damping rotating shaft is fixedly installed on the lateral wall of the optical shield at equal intervals, and an auxiliary light shield is rotatably installed on each micro-damping rotating shaft. The combination of the sliding adjustment of the optical shield and the multi-angle rotation of the auxiliary light shield realizes the directional shielding of strong light and the absorption of stray light, and significantly improves the anti-interference ability of the equipment in complex lighting scenarios.

[0009] Compared with the prior art, the present application has the following beneficial effects: In the present application, by designing four types of windows, more than 90% of typical environments of erosion gully measurement are covered, ensuring that the laser transmittance is greater than or equal to 96% and the attenuation is less than or equal to 4% in any scene, reducing point cloud noise, data voids or precision deviations caused by environmental interference from the source, ensuring the reliability of the measurement results, and cleaning the dust adhered to the surface of the lens during switching.

[0010] In the present application, by providing a mounting disc, a heat dissipation groove, a filter screen and a threaded ring, the threaded ring slides outward under rotation, at which time the threaded ring is separated from the mounting disc, external air can communicate with the inside of the lens through the heat dissipation groove for heat dissipation, and external dust is filtered by the filter screen, and when heat dissipation is not required, the threaded ring can be rotated again to reset it to complete the shielding, thereby improving the heat dissipation efficiency and avoiding performance degradation caused by high temperature; In the present application, by providing a mounting disc, a filter screen, a threaded ring, a sliding rod, a cleaning piece and a second spring, when the threaded ring is rotated, the sliding rod and the cleaning piece are rotated, and when the threaded ring is away from the mounting disc, the second spring gradually resets from the stretched state, so that the cleaning piece always maintains a state of adhering to the filter screen, so that it can always adhere to the filter screen during rotation, thereby scraping the dust generated after use on the filter screen, which is discharged through heat dissipation, ensuring its filtering effect and ensuring that the air entering the equipment interior is always fully filtered, thereby blocking the dust intrusion path from the source; In the present application, by providing a miniature damping shaft and an auxiliary light shield, the auxiliary light shield can be rotated on the miniature damping shaft according to the illumination angle of the light source, so that it is kept in a shielding position of reflected light, thereby accurately blocking the diffuse reflection light from the oblique incidence, further reducing the stray light interference in the lens.

[0011] In the present application, by providing a mounting disc, an arc-shaped groove, a positioning screw and a light shield, the light shield can accurately shield strong light from the sun-facing surface under movement, and during use, the light shield can be moved randomly in the arc-shaped groove according to requirements, and when it is moved to a position that can shield sunlight, the positioning screw is rotated on the mounting disc to complete the locking thereof, the device realizes directional and controllable shielding of the noon direct strong light, can flexibly adjust the shielding position according to the sunlight incidence angle to accurately avoid the strong light from the sun-facing surface, effectively prevents data distortion of the sensor in the equipment caused by strong light oversaturation, and can ensure that the shielding component maintains a stable position in complex outdoor measurement scenes through the locking structure, thereby balancing the adjustment flexibility and fixing reliability, and significantly improving the anti-interference ability and measurement data precision of the device in a strong light environment; In the application, when the equipment falls by accident, the two protection strips and the light shield will first contact with the ground, thereby effectively protecting the equipment, and comprehensively improving the protection effect of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a schematic diagram of the three-dimensional structure of the application; Figure 2 is a schematic diagram of the mounting disc connection structure of the application; Figure 3 is a schematic diagram of the light shield connection explosion structure of the application; Figure 4 is a schematic diagram of the auxiliary light shield connection structure of the application; Figure 5 is a schematic diagram of the cleaning cotton connection structure of the application; Figure 6 is a schematic diagram of the protection cover connection explosion structure of the application; Figure 7 is a schematic diagram of the rotating drum connection explosion structure of the application; Figure 8 is a schematic diagram of the clamping block connection explosion structure of the application; Figure 9 is a schematic diagram of the threaded ring connection explosion structure of the application; Figure 10 is a schematic diagram of the circular ring connection structure of the application.

[0013] In the figure, the corresponding relationship between the component name and the drawing number is: 1, three-dimensional laser scanner; 2, mounting flange; 3, controller; 4, mounting disc; 5, arc-shaped groove; 6, inner threaded strip; 7, protection strip; 8, laser emitting head; 9, heat dissipation groove; 10, filter screen; 11, first inner groove; 12, positioning screw; 13, rotating drum; 14, circular groove; 15, first spring; 16, clamping block; 17, first window; 18, second window; 19, third window; 20, fourth window; 21, protection cover; 22, second inner groove; 23, threaded ring; 24, sliding groove; 25, sliding rod; 26, cleaning piece; 27, circular ring; 28, second spring; 29, light shield; 30, honeycomb hole; 31, micro-damping rotating shaft; 32, auxiliary light shield; 33, cleaning cotton. DETAILED DESCRIPTION

[0014] The embodiments of the application will be further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the application, but cannot be used to limit the scope of the application.

[0015] Example 1: Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 ,Figure 7 、 Figure 8 and Figure 10 The application provides an erosion groove erosion volume measuring device, which comprises a three-dimensional laser scanner 1, a mounting flange 2 fixedly installed at the lower end of the three-dimensional laser scanner 1, a controller 3 and a mounting disc 4 fixedly installed at the upper end of the three-dimensional laser scanner 1, first inner grooves 11 symmetrically formed in the side wall of the mounting disc 4, rotating cylinders 13 rotatably installed in the two first inner grooves 11, circular grooves 14 uniformly and equidistantly formed in the upper end of each rotating cylinder 13, first springs 15 fixedly installed in each circular groove 14, clamping blocks 16 fixedly installed at the upper end of each first spring 15, each clamping block 16 being slidingly installed in each circular groove 14, first windows 17, second windows 18, third windows 19 and fourth windows 20 uniformly and equidistantly installed in the rotating cylinder 13, the first springs 15 and the clamping blocks 16 being driven to rotate under the rotation of the rotating cylinder 13, the first windows 17, the second windows 18, the third windows 19 and the fourth windows 20 also being driven to rotate with the rotating cylinder 13, and the first windows 17, the second windows 18, the third windows 19 and the fourth windows 20 being in contact with cleaning cotton 33 under the rotation, so that the cleaning cotton 33 can simultaneously clean dust adhered to the surface of the cleaning cotton 33, the quality of detection is improved, more than 90% of typical environments of erosion groove measurement are covered through the four types of windows, the laser transmittance is greater than or equal to 96% and the attenuation is less than or equal to 4% in any scene, point cloud noise, data voids or precision deviation caused by environmental interference are reduced from the source, and the reliability of the measurement result is ensured.

[0016] The arc-shaped groove 5 is arranged in the installation disc 4, two groups of inner threaded strips 6 are symmetrically and fixedly installed on the side wall of the installation disc 4, the laser emitting head 8 is fixedly installed on the installation disc 4, the heat dissipation groove 9 is arranged in the side wall of the installation disc 4, the filter screen 10 is fixedly installed in the heat dissipation groove 9, the positioning screw rod 12 is threadedly installed on the upper end of the installation disc 4, the cleaning cotton 33 is fixedly installed on the side wall of the installation disc 4, away from the laser emitting head 8, the protective cover 21 is fixedly installed on the side wall of the installation disc 4, the clamping groove matched with the clamping block 16 is arranged in the inner wall of the protective cover 21 and the installation disc 4, the second inner groove 22 is arranged in the protective cover 21, the rotating drum 13 is rotatably installed in the second inner groove 22, the threaded ring 23 is threadedly installed in the inner wall of the two groups of inner threaded strips 6, the sliding groove 24 is arranged in the threaded ring 23, the sliding rod 25 is slidably installed in the sliding groove 24, the cleaning piece 26 is fixedly installed on the side wall of the sliding rod 25, the cleaning piece 26 is attached to the filter screen 10, the circular ring 27 is fixedly installed on the side of the sliding rod 25, away from the cleaning piece 26, the second spring 28 is fixedly installed on the circular ring 27 at equal intervals, one end of the second spring 28, away from the circular ring 27, is fixedly connected with the threaded ring 23, the light shield 29 is slidably installed in the arc-shaped groove 5, when the threaded ring 23 rotates, the sliding rod 25 and the cleaning piece 26 will rotate with the threaded ring 23, when the threaded ring 23 is away from the installation disc 4, the second spring 28 is gradually reset from the stretched state, so that the cleaning piece 26 is always attached to the filter screen 10, so that the cleaning piece 26 is always attached to the filter screen 10 during rotation, and the dust generated after use on the filter screen 10 can be scraped off, and the dust is discharged through heat dissipation, so that the filtering effect is ensured, the air entering the equipment is always fully filtered, and the dust intrusion path is blocked from the source. When the equipment needs to be cooled in a high-temperature environment, the threaded ring 23 can be rotated on the inner threaded strip 6 at this time, and the threaded ring 23 will slide outward under the rotation of the threaded ring 23, at this time, the threaded ring 23 is separated from the installation disc 4, the external air can be communicated with the lens through the heat dissipation groove 9, and the heat dissipation is performed, and the external dust is filtered through the filter screen 10, and when the heat dissipation is not needed, the threaded ring 23 can be rotated again to reset it, and the shielding is completed, and the heat dissipation efficiency is improved through the design, and the performance degradation caused by high temperature is avoided.

[0017] Embodiment 2: please refer to Figure 9 The protective strip 7 is fixedly installed on the group of inner threaded strips 6 located below, through the design of the two protective strips 7, when the equipment accidentally falls, the two protective strips 7 will first contact the ground, and the equipment is effectively protected, and the protection effect of the equipment is comprehensively improved.

[0018] Embodiment 3: please refer to Figure 4The inner wall of the light shield 29 is provided with a honeycomb hole 30, the diameter of the honeycomb hole 30 gradually decreases from outside to inside, by the structure that the honeycomb hole 30 is provided in the light shield 29 and the diameter of the honeycomb hole 30 gradually decreases from outside to inside, and the inner wall surface of the honeycomb hole 30 is sprayed with a nano-carbon-based extinction coating, the surface of the coating is micro-nano concave-convex texture, after the stray light enters the light shield 29, it does not propagate in a straight line, and may be reflected multiple times between the hole walls. If the hole diameter is constant, a reflection channel is easily formed to cause light leakage, and the gradient hole diameter can artificially change the reflection path of the stray light through the structure of the front wide and the rear narrow. The large hole diameter at the front end provides an initial buffer space for the stray light, but the hole wall has begun to preliminarily absorb energy. With the decrease of the hole diameter, the cross section of the channel gradually narrows, and the stray light will hit the hole wall more frequently during propagation. Each impact will consume energy through the light-absorbing material of the hole wall. Finally, the stray light that is not intercepted at the front end experiences multiple reflections-energy attenuation in the narrow channel at the rear end, and almost no enough energy can reach the lens, forming a progressive energy dissipation, greatly reducing the contact between the interference light and the laser emitter 8, and affecting the measurement stability and accuracy of the laser emitter 8.

[0019] In example 4, a micro-damping rotating shaft 31 is fixedly installed on the side wall of the light shield 29 at equal intervals, and an auxiliary light shield plate 32 is rotatably installed on each micro-damping rotating shaft 31. When sunlight shines on the wall of the erosion ditch and the ground reflection forms diffuse reflection light, the light source is easy to enter the lens from an oblique angle, causing internal glare of the lens. At this time, the auxiliary light shield plate 32 can be rotated on the micro-damping rotating shaft 31 according to the illumination angle of the light source, so as to keep it in a shielding position of the reflected light, thereby accurately blocking the diffuse reflection light incident from an oblique angle and further reducing the stray light interference in the lens.

[0020] Working principle: Firstly, 3-5 targets are arranged on the stable ditch bank during use, the target spacing is measured for standby, the scanning stations are planned along the ditch bank and the ditch bottom, the device is installed on the support through the flange 2, then the device is leveled, the high-resolution scanning parameters are set, the laser emitter 8 is used to emit laser scanning station by station, it is ensured that the targets and the ditch bottom / wall are not shielded, the data is saved, then the point cloud is imported, the multi-station data is spliced through the targets, the noise points are removed, and the erosion ditch area is cropped out, and then the reference surface is fitted based on the un-eroded ditch bank; a three-dimensional grid model of the erosion ditch is generated, the recess volume below the reference surface is calculated, and the erosion volume is obtained. Second step, when the sun is directly shining on the lens at noon, the light shield 29 is moved inside the arc-shaped groove 5 at this time, which can accurately block the strong light from the sun-facing surface under the movement of the light shield 29, and can also be moved randomly inside the arc-shaped groove 5 according to requirements when in use, and when moved to a position that can block the sun, the locking is completed by rotating the positioning screw 12 on the mounting disc 4, which realizes the directional and controllable blocking of the noon direct strong light. It can flexibly adjust the blocking position according to the incident angle of sunlight to accurately avoid the strong light from the sun-facing surface, effectively prevent the data distortion of the sensor inside the equipment caused by strong light oversaturation, and ensure the stable position of the blocking component in complex outdoor measurement scenes through the locking structure, taking into account the adjustment flexibility and fixing reliability, significantly improving the anti-interference ability and measurement data precision of the equipment in strong light environment. Third step, by opening a honeycomb hole 30 inside the light shield 29, and the structure of the honeycomb hole 30 gradually reduces the aperture from outside to inside, and the inner wall surface of the honeycomb hole 30 is sprayed with a nano-carbon-based light extinction coating, and the surface of the coating is textured with micro-nano concave-convex texture. After the stray light enters the light shield 29, it does not propagate in a straight line, and may be reflected multiple times between the hole walls. If the aperture is constant, it is easy to form a reflection channel to cause light leakage. The gradient aperture can artificially change the reflection path of stray light through the structure of the front wide and the back narrow. The large aperture at the front end provides an initial buffer space for stray light, but the hole wall has begun to absorb energy. As the aperture decreases, the channel cross-section gradually narrows, and the stray light will hit the hole wall more frequently during transmission. Each impact will consume energy through the light-absorbing material of the hole wall. Finally, the stray light that is not intercepted at the front end experiences multiple reflections-energy attenuation in the narrow channel at the back end, and it is almost impossible to maintain enough energy to reach the lens, forming a progressive energy dissipation, which significantly reduces the contact between interfering light and the laser emitter 8, affecting the measurement stability and accuracy of the laser emitter 8.

[0021] Fourth step, when the sunlight shines on the groove wall of the erosion groove and the ground reflection forms diffuse reflection light, the light source is easy to enter the lens from the oblique angle, causing glare inside the lens. At this time, the auxiliary light shield 32 can be rotated on the micro-damping shaft 31 according to the illumination angle of the light source, so that it remains in the shielding position of the reflected light, thereby accurately blocking the diffuse reflection light incident from the oblique angle, further reducing the stray light interference inside the lens.

[0022] In the fifth step, the rotating drum 13 can be rotated inside the installation disc 4 and the protective cover 21 during measurement. The first spring 15 and the clamping block 16 will be rotated under the rotation of the rotating drum 13. The first window 17, the second window 18, the third window 19 and the fourth window 20 will also rotate with the rotating drum 13. Under the rotation of the first window 17, the second window 18, the third window 19 and the fourth window 20, the cleaning cotton 33 will be in contact with the cleaning cotton 33. At this time, the cleaning cotton 33 can clean the dust adhered to its surface synchronously, improving the quality of detection. When the clamping block 16 rotates to be opposite to the clamping groove inside the protective cover 21, the first spring 15 will restore the elastic force, and then the clamping block 16 will be popped into the clamping groove to complete the clamping. Through this design, the first window 17, the second window 18, the third window 19 and the fourth window 20 on the rotating drum 13 can be adjusted to the positions opposite to the laser emitting head 8 to cooperate with detection: The first window 17 is made of high-transmittance quartz glass with a light transmittance of ≥97% and an impact strength of 500 MPa. The outer layer is a super-hydrophobic anti-fouling coating, which is difficult for dust and sand particles to adhere to and can roll off a small amount of dew. The inner layer is an anti-reflection film, which reduces laser reflection loss. It is suitable for sunny or cloudy days, and for erosion gully measurement in dry soil that is easy to generate dust without precipitation. The second window 18 is made of anti-fog tempered glass. Hydrophilic groups are implanted inside the glass to form a self-wetting surface, which reduces the possibility of water vapor condensing into fog. The outer layer is a water-resistant anti-fog coating (containing nanoscale hydrophilic molecules, which form a uniform water film on the surface instead of fog droplets, without affecting light transmission). The inner layer is a moisture-resistant anti-reflection film (which is stable under high humidity, avoiding the peeling of the coating due to water vapor). A small amount of montmorillonite moisture absorbent (content ≤5%) is mixed in the silicone seal ring at the edge of the window, which can absorb a small amount of infiltrated water vapor, keeping the inside of the glass dry for a long time. It is suitable for scanning erosion gullies in mountainous areas with moist soil, high air moisture content, and morning dew. The third window 19 is made of chemically strengthened aluminosilicate glass with a surface hardness of Mohs 7, which can resist slight scratches from stones and branches. The impact strength is improved to 800 MPa. The outer layer is a super-hydrophobic wear-resistant coating. The middle layer is a waterproof sealing film. The inner layer is a high-transmittance anti-reflection film, which is suitable for emergency measurement in rainy weather, erosion gully bottom with water / mud, and mountainous erosion gully wall scanning with many stones. The fourth window 20 is made of anti-freezing tempered glass with a light transmittance of ≥96%. The surface is coated with a double-layer anti-freezing coating. The outer layer is a super-hydrophilic anti-frost coating, which can lower the freezing point of water to below -15°C. Even if low-temperature water vapor contacts the surface, it will form a uniform water film instead of frost crystals, avoiding the scattering of laser by frost layer. The inner layer is a low-temperature-resistant anti-reflection film, which does not crack or fall off at -30°C, ensuring that the laser attenuation is ≤4%. It is suitable for erosion gully measurement in northern winter (air temperature ≤-5°C) and low-temperature environment scanning in high-altitude mountainous areas (such as the edge of Qinghai-Tibet Plateau). It is especially suitable for morning frost, light snowfall or low-temperature and high-humidity scenes. The four types of windows described above cover more than 90% of typical environments for erosion groove measurement, ensuring that the laser transmittance is greater than or equal to 96% and the attenuation is less than or equal to 4% in any scenario, thereby reducing point cloud noise, data gaps or precision deviations caused by environmental interference from the source, and ensuring the reliability of the measurement results. In the sixth step, when the device needs to be cooled in a high-temperature environment, the threaded ring 23 can be rotated on the inner threaded strip 6, and the threaded ring 23 will slide outward under the rotation of the threaded ring 23, at which time the threaded ring 23 is separated from the mounting disc 4, and the external air can be communicated with the lens interior through the heat dissipation groove 9 to dissipate heat, and the external dust is filtered by the filter screen 10, and when cooling is not needed, the threaded ring 23 can be rotated again to reset it to complete the shielding, thereby improving the cooling efficiency and avoiding performance degradation caused by high temperature. In the seventh step, when the threaded ring 23 is rotated, the slide rod 25 and the cleaning sheet 26 are rotated with it, and when the threaded ring 23 moves away from the mounting disc 4, the second spring 28 gradually resets from the stretched state, so that the cleaning sheet 26 always maintains a state of adhesion with the filter screen 10, so that it can also always adhere to the filter screen 10 when it is rotated, thereby scraping the dust generated after use on the filter screen 10, which is discharged with heat dissipation, ensuring its filtering effect and ensuring that the air entering the device interior is always fully filtered to block the dust intrusion path from the source. In the eighth step, through the design of the two protective strips 7, when the device is accidentally dropped, the two protective strips 7 and the light shield 29 will first contact the ground, thereby effectively protecting the device and comprehensively improving the protection effect of the device.

[0023] Embodiments of the present application are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the application to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. Embodiments are chosen and described in order to best explain the principles of the application and its practical application, and to enable others skilled in the art to understand the application for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. An erosion gully erosion volume measuring device, comprising a three-dimensional laser scanner (1), a mounting flange (2) is fixedly installed at the lower end of the three-dimensional laser scanner (1), a controller (3) and a mounting disc (4) are fixedly installed at the upper end of the three-dimensional laser scanner (1), characterized in that: Symmetrically, a first inner groove (11) is arranged on the side wall of the mounting disc (4), and a rotating drum (13) is rotatably arranged in the two first inner grooves (11).

2. An apparatus for measuring rill erosion volume as claimed in claim 1, wherein, An arc-shaped groove (5) is arranged in the mounting disc (4). Two groups of inner threaded strips (6) are symmetrically and fixedly arranged on the side wall of the mounting disc (4).

3. An apparatus for measuring the volume of rill erosion as defined in claim 2, wherein, A protection strip (7) is fixedly arranged on the group of inner threaded strips (6) located at the lower side. A laser emitting head (8) is fixedly arranged on the mounting disc (4), and a heat dissipation groove (9) is arranged on the side wall of the mounting disc (4).

4. An apparatus for measuring the volume of rill erosion as defined in claim 3, wherein A filter screen (10) is fixedly arranged in the heat dissipation groove (9), and a positioning screw rod (12) is threadedly arranged on the upper end of the mounting disc (4). A cleaning cotton (33) is fixedly arranged on the side wall of the mounting disc (4) away from the laser emitting head (8).

5. An apparatus for measuring the volume of rill erosion as defined in claim 4 wherein, A protection cover (21) is fixedly arranged on the side wall of the mounting disc (4). A second inner groove (22) is arranged in the protection cover (21), and the rotating drum (13) is rotatably arranged in the second inner groove (22).

6. An apparatus for measuring the volume of rill erosion as defined in claim 5, wherein, A clamping groove matched with the clamping block (16) is arranged in the inner wall of the protection cover (21) and the mounting disc (4).

7. The device of claim 4, wherein, Threaded rings (23) are threadedly arranged in the inner walls of the two groups of inner threaded strips (6), and sliding grooves (24) are arranged on the threaded rings (23). A sliding rod (25) is slidably arranged in the sliding groove (24), and a cleaning piece (26) is fixedly arranged on the side wall of the sliding rod (25).

8. An apparatus for measuring the volume of rill erosion as defined in claim 7 wherein, The cleaning piece (26) is attached to the filter screen (10). A circular ring (27) is fixedly arranged on the side of the sliding rod (25) away from the cleaning piece (26).

9. The device of claim 2, wherein, Second springs (28) are equidistantly fixedly arranged on the circular ring (27), and one end of each second spring (28) away from the circular ring (27) is fixedly connected with the threaded ring (23). An optical shield (29) is slidably arranged in the arc-shaped groove (5).

10. The device of claim 9, wherein, Honeycomb holes (30) are arranged in the inner wall of the optical shield (29), and the diameters of the honeycomb holes (30) gradually decrease from the outside to the inside. Miniature damping rotating shafts (31) are equidistantly fixedly arranged on the side wall of the optical shield (29). An auxiliary light shield plate (32) is rotatably arranged on each miniature damping rotating shaft (31).

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