Soil profile spectral image acquisition method

Abstract

The invention relates to a soil profile spectral image acquisition method, which comprises the following steps of: placing an acquisition vehicle on the ground beside a trench, enabling a white board and a hyperspectral imager to be positioned in the trench, enabling the white board to be positioned between the hyperspectral imager and a to-be-acquired vertical surface of the trench, correcting a spectral white board, recording a vertical distance L between the white board and a lens of the hyperspectral imager, the hyperspectral imager is moved to enable the spectrometer host to directly face the vertical face to be collected of the trench, and the distance between the spectrometer host and the vertical face to be collected of the trench is L, and visible light images and reflection spectrum information of the vertical face of the trench are shot in the dug trench through the hyperspectral imager and transmitted to the control center. The invention aims to provide a soil profile spectral image acquisition method capable of accurately acquiring soil mass data in a labor-saving manner, and solves the problems of labor waste and poor data accuracy when an existing handheld hyperspectral imager performs acquisition in a trench.

Description

Technical Field

[0001] The present invention relates to the technical field of soil body detection and analysis, and in particular to a soil profile spectral image acquisition method. Background Art

[0002] Profile survey is one of the most important tasks in soil survey. Soil profile refers to the longitudinal profile of soil from the ground vertically downward, that is, a complete vertical soil layer sequence. Different types of soil have soil profiles of different forms. Through soil profiles, we can understand the soil's occurrence layer, color, texture, structure, new bodies, etc.; we can also understand the migration and transformation of substances during the soil formation process. Through the different layers and changes of soil differentiation composition, properties and morphology, we can obtain multi-level and multi-angle information such as soil formation process and soil properties.

[0003] In the soil profile survey, in-situ collection of images at all levels is an important part of the work. At present, this work is mainly carried out by investigators standing or crawling in the soil profile with a handheld camera. Due to the narrow soil profile (generally 2.0m deep and 1.5m wide), and the large amount of mud and water (caused by groundwater outburst), the collected images are often incomplete or of low quality. In addition, the mud and water in the profile often damage the camera equipment. Therefore, an automated soil profile image acquisition device is urgently needed. In addition, the current determination of soil physical and chemical properties at all levels of the soil profile generally involves collecting the soil first, air-drying it, and then sending it to the laboratory for chemical analysis. Although this method has accurate and reliable results, it requires a lot of time and manpower and material resources, and has a high economic cost. Spectral technology is a technology that has emerged in recent years. Domestic and foreign studies have shown that soil organic matter, nitrogen, organic carbon, water content, heavy metals and other indicators can be inverted and estimated through reflectance spectroscopy. Therefore, compared with the current traditional sampling and sample delivery chemical testing methods, spectral technology methods have the advantages of fast speed, high efficiency and low economic cost. The existing spectral technology method is still to collect data in the trench through several handheld hyperspectral imagers, which makes the collection difficult and the accuracy of the collected data is poor because the distance between the hyperspectral imager and the vertical surface of the trench to be collected cannot be accurately controlled. Summary of the invention

[0004] The present invention aims to provide a soil profile spectral image acquisition method which can save effort and accurately acquire soil data, thereby solving the problem of laborious data acquisition and poor data accuracy in existing handheld hyperspectral imagers in trenches.

[0005] The above technical problems are solved by the following technical solutions: a soil profile spectral image acquisition method, characterized in that it is completed by a soil profile spectral image acquisition device, the soil profile spectral image acquisition device includes a whiteboard, a collection vehicle, a hyperspectral imager and a control center for controlling the hyperspectral imager, the hyperspectral imager is used to take visible light images and reflection spectrum information of the trench facade in the excavated trench and transmit them to the control center, the control center is installed on the collection vehicle, the collection vehicle is provided with a suspension frame, one end of the suspension frame extends above the trench, the hyperspectral imager can be raised and lowered and moved vertically to the trench The whiteboard is movably connected to the suspension frame in the direction of rotation, and the whiteboard is movably connected to the suspension frame; the process of collecting soil profile spectral images is as follows: placing the collection vehicle on the ground beside the ditch, so that the whiteboard and the hyperspectral imager are located in the ditch, the whiteboard is located between the hyperspectral imager and the vertical surface of the ditch to be collected, performing spectral whiteboard calibration, recording the vertical distance L between the whiteboard and the hyperspectral imager lens, moving the hyperspectral imager so that the spectrometer host is facing the vertical surface of the ditch to be collected and the distance is L, and using the hyperspectral imager to shoot the visible light image and reflection spectrum information of the ditch vertical surface in the excavated ditch and transmit them to the control center.

[0006] Preferably, the suspension frame includes a cross bar connected to the collection vehicle at one end and a vertical bar connected to the other end of the cross bar at the upper end, the hyperspectral imager is connected to the vertical bar in a liftable manner, the cross bar extends perpendicular to the extension direction of the trench, and the cross bar is connected to the collection vehicle in a transversely movable manner to achieve translation of the hyperspectral imager in a direction perpendicular to the trench.

[0007] Preferably, a crossbar fixing sleeve and a transverse telescopic oil cylinder are fixed on the collection vehicle, and the crossbar passes through the crossbar fixing sleeve and is connected to the transverse telescopic oil rod. A technical solution for realizing the transverse movement of the hyperspectral imager is provided.

[0008] Preferably, the upper end of the vertical rod is inserted into the connecting through hole of the cross bar on the cross bar and is fixed to the connecting through hole of the cross bar. The hyperspectral imager is mounted on the vertical rod through a hyperspectral imager connecting sleeve. The upper end of the vertical rod is provided with an active synchronous pulley and the lower end is provided with a driven synchronous pulley. Both ends of the synchronous belt are fixed on the hyperspectral imager connecting sleeve to form a ring. The synchronous belt passes around the active synchronous pulley and the driven synchronous pulley. A power cord extending along the extension direction of the synchronous belt is connected to the surface of the synchronous belt located on the outer side of the ring. The power cord includes an insulating jacket and a conductive core wire located in the insulating jacket. The wires of the hyperspectral imager are connected to the power cord to introduce power. The cross bar is also provided with a conductive needle aligned with the power cord and a conductive needle driving cylinder that drives the conductive needle to move toward the power cord to pierce the insulating jacket and then connect to the conductive core wire. The conductive needle is connected to the power supply through the power supply introduction line. When the hyperspectral imager moves to a set height, the conductive drive cylinder drives the conductive needle to pierce the insulating jacket and connect with the conductive core wire, so that the power supply is connected to the hyperspectral imager for power supply. A power supply method for the mobile hyperspectral imager is realized, and the method does not cause the winding of the wire.

[0009] Preferably, the vertical rod is connected to a knife seat, the knife seat is provided with a limit hole, the synchronous belt is inserted into the limit hole, the knife seat is provided with a conductive needle guide hole connected to the limit hole, the conductive needle is inserted into the electric needle guide hole and the needle tip faces the power cord, so that the conductive needle can be reliably inserted and abutted against the conductive core wire to supply power.

[0010] Preferably, the extending direction of the conductive needle is the same as the distribution direction of the synchronous belt and the power cord. The conductive needle has good reliability when inserted and connected with the conductive core wire.

[0011] Preferably, a positioning convex ring is provided at the upper end of the through hole connecting the crossbar portion, and the positioning convex ring is passed through the driven gear, the driven gear is meshed with the driving gear, the driving gear is connected to the driving gear drive motor, the whiteboard is connected to the driven gear through a connecting rod, a reference frame is provided on one side of the whiteboard, and when the whiteboard moves to be located directly in front of the hyperspectral imager, the reference frame is located on the side of the whiteboard away from the hyperspectral imager, and the synchronous belt is passed through the driving gear. When in use, the active gear drives the gear to rotate until the whiteboard is located directly in front of the hyperspectral imager until the reference frame abuts against the vertical surface of the ditch to be collected, and the spectral whiteboard is calibrated. After the spectral whiteboard calibration is completed, the active gear drives the gear to rotate until the whiteboard is staggered with the hyperspectral imager, and then subsequent work is carried out. It is convenient to calibrate the spectral whiteboard.

[0012] Preferably, it also includes a movable water shield and a propulsion structure connected to the collection vehicle to drive the movable water shield to move together with the collection vehicle, the hyperspectral imager and the whiteboard are both located in the hyperspectral imager connection sleeve, the movable water shield includes a bottom plate and a front side plate, a right side plate and a rear side plate connected to the bottom plate, the bottom plate, the front side plate, the right side plate and the rear side plate form a sealed shell, the hyperspectral imager faces the left side of the movable water shield, the left side of the movable water shield is an open structure, and the left end of the front side plate is provided with There is a front vertical blade bar with a cutting edge extending vertically forward, and the left end of the rear side plate is provided with a rear vertical blade bar with a cutting edge extending vertically forward, and the rear vertical blade bar extends to the left beyond the front vertical blade bar, and the outside of the right side wall is provided with a plurality of right side plate support rollers, and the right side plate support rollers extend in the up-down direction, and the distance between the support plane determined by the right side plate support rollers and the surface of the front vertical blade bar away from the ditch is greater than the width of the ditch, and the lower surface of the bottom plate is provided with a plurality of bottom plate support rollers extending in the left-right direction and distributed in the front-back direction. When in use, the mobile water retaining cover is located in the ditch, and the water in the ditch is drained, and the mobile water retaining cover is moved at this time, and the mobile water retaining cover is inserted into the soil body through the front vertical blade bar and the rear vertical blade and cuts off the soil to achieve sealing, so that the water in the ditch is prevented from entering the mobile water retaining cover during the entire sampling movement process. This technical solution ensures that when there is water in the ditch, the whiteboard and the hyperspectral imager do not contact the water, and the facade of the ditch to be collected is not submerged in water and data can be collected. At the same time, the trench is made by digging from top to bottom. At this time, the vertical surface soil to be collected in the trench will produce vertical cross-positioning. In the technical solution, when sealing is achieved during the movement, the front vertical shovel bar shovels down the surface of the vertical surface of the trench to be collected in the horizontal direction, so that the cross-positioned part of the vertical surface of the trench to be collected is removed, thereby improving the accuracy of data collection.

[0013] Preferably, the mobile water shield is provided with an isolation plate, which isolates the front cavity and the rear cavity of the mobile water shield. The hyperspectral imager and the whiteboard are both located in the front compartment. The rear compartment is provided with a conveyor belt for outputting the soil shoveled by the rear vertical shovel bar to the outside of the mobile water shield. The conveyor belt includes a driven pulley rotatably connected to the lower end of the left side of the rear compartment, a driving pulley rotatably connected to the outside of the mobile water shield, a flat belt connecting the driven pulley and the driving pulley, and a conveying motor driving the driving pulley to rotate. The driven pulley extends in the front-to-back direction, and the flat belt is connected end to end to form a ring. The outer peripheral surface of the flat belt is provided with a plurality of retaining plates distributed along the circumference of the flat belt to prevent the soil from sliding down from the flat belt. The surface determined by the driving pulley and the driven pulley is an inclined surface. It can avoid the accumulation of soil shoveled by the rear vertical shovel bar during the sealing process, which causes the mobile water shield to be blocked and interfered with. It can reliably output the soil in the mobile water shield even when the lateral distance of the groove is small.

[0014] Preferably, the retaining plate is connected to the outer peripheral surface of the flat belt through a connecting seat, and the connecting seat is hinged with the retaining plate through a hinge shaft along the front-to-back direction. A limit block is provided on the connecting seat, and the limit block and the retaining plate are distributed from back to front along the rotation direction of the conveyor belt. When the retaining plate is located above the flat belt, the flat belt abuts against the limit block and maintains standing on the flat belt. When the retaining plate is located below the flat belt, the flat belt rotates to a vertical state under the action of gravity. This technical solution can generate rotation in the process of the retaining plate conveying soil to the outside of the mobile water retaining cover in a circular manner, and the result of the rotation is that an impact is generated, causing the soil on the retaining plate to fall off completely. .

[0015] The invention has the following advantages: the hyperspectral imager can be moved to collect data, which saves labor and has high data accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view schematic diagram of the soil profile spectral image acquisition device in the first embodiment; Figure 2 for Figure 1 A local enlarged schematic diagram of point A; Figure 3 for Figure 2 A local enlarged schematic diagram of point B; Figure 4 for Figure 1 A local enlarged schematic diagram of point C; Figure 5 for Figure 4 A local enlarged schematic diagram of D; Figure 6 for Figure 1 A local enlarged schematic diagram of point E; Figure 7 This is a top view of the soil profile spectral image acquisition device in Example 2, in which the whiteboard, hyperspectral imager and suspension bracket are not drawn; Figure 8 for Figure 7 F-F cross-sectional schematic diagram; Fig. 9 for Figure 8 A local enlarged schematic diagram of G; Fig.10 for Fig. 9 A local enlarged schematic diagram of point H.

[0017] In the figure: whiteboard 1, hyperspectral imager 2, control center 3, trench 4, collection vehicle 5, crossbar 6, vertical bar 7, crossbar fixing sleeve 8, horizontal telescopic cylinder 9, crossbar connecting through hole 10, hyperspectral imager connecting sleeve 11, active synchronous pulley 12, driven synchronous pulley 13, synchronous belt 14, power cord 15, insulating jacket 16, conductive core wire 17, wire of hyperspectral imager 18, conductive needle 19, conductive needle driving cylinder 20, power lead-in wire 21, knife seat 22, limit through hole 23, needle tip 24, from Moving gear 25, driving gear 26, driving gear drive motor 27, connecting rod 28, reference frame 29, mobile water retaining cover 30, propulsion structure 31, isolation plate 32, front vertical shovel bar 33, rear vertical shovel bar 34, right side plate support roller 35, bottom plate support roller 36, conveyor belt 37, driven pulley 38, driving pulley 39, flat belt 40, retaining plate 41, connecting seat 42, hinge shaft 43, limit block 44, connecting plate 45, guide rod 46, adjusting nut 47, spring 48, positioning convex ring 49. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to further divide the technical solutions in the embodiments of the present invention into embodiments, rather than all embodiments. Based on the embodiments in the present invention, the present invention is clearly and completely described. Obviously, the described embodiments are only a part of the present invention. All other embodiments obtained by ordinary technicians without creative work are within the scope of protection of the present invention.

[0019] Example 1, see Figures 1 to 6 A soil profile spectral image acquisition method is completed by a soil profile spectral image acquisition device. The soil profile spectral image acquisition device includes a whiteboard 1, a hyperspectral imager 2 and a control center 3 for controlling the hyperspectral imager. The hyperspectral imager is used to capture visible light images and reflection spectrum information of the trench facade in the excavated trench 4 and transmit them to the control center. It also includes a collection vehicle 5, and the control center is installed on the collection vehicle. The collection vehicle is provided with a suspension frame, and one end of the suspension frame extends above the trench. The hyperspectral imager can be raised and lowered and is connected to the suspension frame in a direction perpendicular to the trench, and the whiteboard can be movably connected to the suspension frame. The process of collecting soil profile spectral images is as follows: placing the collection vehicle on the ground next to the ditch, placing the whiteboard and the hyperspectral imager in the ditch, and placing the whiteboard between the hyperspectral imager and the vertical surface of the ditch to be collected, performing spectral whiteboard calibration, recording the vertical distance L between the whiteboard and the hyperspectral imager lens, moving the hyperspectral imager so that the spectrometer host faces the vertical surface of the ditch to be collected and the distance is L, and using the hyperspectral imager to capture the visible light image and reflected spectrum information of the ditch vertical surface in the excavated ditch and transmit them to the control center.

[0020] The suspension frame includes a cross bar 6 connected to the collection vehicle at one end and a vertical bar 7 connected to the other end of the cross bar at the upper end. The hyperspectral imager can be connected to the vertical bar in a lifting manner. The cross bar extends perpendicular to the extension direction of the trench. The cross bar can be connected to the collection vehicle in a transversely movable manner to achieve the translation of the hyperspectral imager in a direction perpendicular to the trench. The collection vehicle is fixed with a cross bar fixing sleeve 8 and a transverse telescopic oil cylinder 9. The cross bar passes through the cross bar fixing sleeve and is connected to the transverse telescopic oil rod. The upper end of the vertical bar is inserted into the cross bar portion connecting through hole 10 on the cross bar and is fixed to the cross bar portion connecting through hole. The hyperspectral imager is sleeved on the vertical bar through a hyperspectral imager connecting sleeve 11. The upper end of the vertical rod is provided with an active synchronous pulley 12, and the lower end is provided with a driven synchronous pulley 13. The two ends of the synchronous belt 14 are fixed on the connection sleeve of the hyperspectral imager to form a ring. The synchronous belt passes around the active synchronous pulley and the driven synchronous pulley. The surface of the synchronous belt located on the outer side of the ring is connected with a power cord 15 extending along the extension direction of the synchronous belt. The power cord includes an insulating jacket 16 and a conductive core wire 17 located in the insulating jacket. The wire 18 of the hyperspectral imager is connected with the power cord to introduce power. The horizontal rod is also provided with a conductive needle 19 aligned with the power cord and a conductive needle driving cylinder 20 that drives the conductive needle to move toward the power cord to pierce the insulating jacket and then connect with the conductive core wire. The conductive needle is connected with the power supply through the power supply lead-in wire 21. When the hyperspectral imager moves to a set height position, the conductive drive cylinder drives the conductive needle to pierce the insulating jacket and connect with the conductive core wire, so that the power supply is connected to the hyperspectral imager for power supply. A knife seat 22 is connected to the vertical rod, and a limit through hole 23 is provided on the knife seat. The synchronous belt is inserted into the limit through hole. A conductive needle guide through hole connected to the limit through hole is provided on the knife seat. The conductive needle is inserted into the electric needle guide through hole and the needle tip 24 faces the power cord. The extension direction of the conductive needle is the same as the distribution direction of the synchronous belt and the power cord. A positioning convex ring 49 is provided at the upper end of the crossbar connecting through hole. The positioning convex ring is inserted into the driven gear 25. The driven gear is meshed with the driving gear 26. The driving gear is connected to the driving gear drive motor 27. The whiteboard is connected to the driven gear through a connecting rod 28. A reference frame 29 is provided on one side of the whiteboard. When the whiteboard moves to the front of the hyperspectral imager, the reference frame is located on the side of the whiteboard away from the hyperspectral imager. The synchronous belt is inserted into the driving gear.

[0021] Embodiment 2 is different from Embodiment 1 in that: See also Figures 7 to 10, also includes a mobile water shield 30 and a propulsion structure 31 connected to the collection vehicle and driving the mobile water shield to move along with the collection vehicle, and the propulsion mechanism is a connecting frame. An isolation plate 32 is provided in the mobile water shield, and the isolation plate isolates the front cavity and the rear cavity of the mobile water shield. The hyperspectral imager and the whiteboard are both located in the front compartment. The mobile water shield includes a bottom plate and a front side plate, a right side plate and a rear side plate connected to the bottom plate. The bottom plate, the front side plate, the right side plate and the rear side plate form a sealed shell. The hyperspectral imager faces the left side of the mobile water shield, and the left side of the mobile water shield is an open structure. The left end of the front side plate is provided with a front vertical shovel bar 33 extending vertically with the cutting edge facing forward, and the left end of the rear side plate is provided with a rear vertical shovel bar 34 extending vertically with the cutting edge facing forward, and the rear vertical shovel bar extends to the left beyond the front vertical shovel bar, so that the front vertical shovel bar is inserted into the soil to achieve sealing, and after the soil is shoveled during the movement, the rear vertical shovel bar can still be shoveled into the soil to achieve sealing). A plurality of right side plate support rollers 35 are provided on the outside of the right side wall, and the right side plate support rollers extend in the up-down direction, and the distance between the support plane determined by the right side plate support rollers and the surface of the front vertical shovel bar away from the ditch side is greater than the width of the ditch. The right side plate support roller is connected to the connecting plate 45, and the connecting plate is sleeved on the guide rod 46 connected to the right side plate, and the guide rod is threadedly connected with an adjusting nut 47, and the guide rod is sleeved with a spring 48, one end of the spring abuts on the connecting plate, and the other end abuts on the adjusting nut. The spring is used to drive the force of the right side plate support roller abutting against the ditch. A plurality of bottom plate support rollers 36 extending in the left-right direction and distributed in the front-back direction are sleeved on the lower surface of the bottom plate. A conveyor belt 37 is provided in the rear bin to output the soil shoveled by the rear vertical shovel blade to the outside of the mobile water retaining cover. The conveyor belt includes a driven pulley 38 rotatably connected to the lower end of the left side of the rear bin, a driving pulley 39 rotatably connected to the outside of the mobile water retaining cover, a flat belt 40 connecting the driven pulley and the driving pulley, and a conveying motor driving the driving pulley to rotate. The driven pulley extends in the front-back direction, and the flat belt is connected head to tail to form a ring. A plurality of retaining plates 41 are provided on the outer peripheral surface of the flat belt to prevent the soil from sliding down from the flat belt and distributed along the circumference of the flat belt. The surface determined by the driving pulley and the driven pulley is an inclined surface. The retaining plate is connected to the outer peripheral surface of the flat belt through a connecting seat 42, and the connecting seat is hinged with the retaining plate through a hinge shaft 43 along the front-to-back direction. A limit block 44 is provided on the connecting seat. The limit block and the retaining plate are distributed from back to front along the rotation direction of the conveyor belt. When the retaining plate is located above the flat belt, the flat belt abuts against the limit block and maintains standing on the flat belt. When the retaining plate is located below the flat belt, the flat belt rotates to a vertical state under the action of gravity.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A soil profile spectral image acquisition method, It is characterized in that The soil profile spectral image acquisition device is used to complete the process. The soil profile spectral image acquisition device includes a whiteboard, a collection vehicle, a hyperspectral imager, and a control center for controlling the hyperspectral imager. The hyperspectral imager is used to capture visible light images and reflection spectrum information of the trench facade in the excavated trench and transmit them to the control center. The control center is installed on the collection vehicle. The collection vehicle is provided with a suspension frame, one end of which extends above the trench. The hyperspectral imager can be raised and lowered and is connected to the suspension frame in a direction perpendicular to the trench. The whiteboard The spectral image acquisition process of the soil profile is as follows: placing the acquisition vehicle on the ground beside the ditch, placing the whiteboard and the hyperspectral imager in the ditch, placing the whiteboard between the hyperspectral imager and the vertical surface of the ditch to be acquired, performing spectral whiteboard calibration, recording the vertical distance L between the whiteboard and the hyperspectral imager lens, moving the hyperspectral imager so that the spectrometer host faces the vertical surface of the ditch to be acquired and the distance is L, and taking visible light images and reflection spectrum information of the ditch vertical surface in the excavated ditch by the hyperspectral imager and transmitting them to the control center.

2. According to the soil profile spectral image acquisition method of claim 1, It is characterized in that The suspension frame includes a cross bar whose one end is connected to the collection vehicle and a vertical bar whose upper end is connected to the other end of the cross bar. The hyperspectral imager can be connected to the vertical bar in a lifting manner. The cross bar extends perpendicular to the extension direction of the trench. The cross bar can be connected to the collection vehicle in a transversely movable manner to achieve translation of the hyperspectral imager in a direction perpendicular to the trench.

3. According to the soil profile spectral image acquisition method of claim 2, It is characterized in that A crossbar fixing sleeve and a transverse telescopic oil cylinder are fixed on the collection vehicle. The crossbar passes through the crossbar fixing sleeve and is connected with the transverse telescopic oil rod.

4. A soil profile spectral image acquisition method according to claim 2 or 3, It is characterized in that The upper end of the vertical rod is inserted into the connecting through hole of the cross bar on the cross bar and is fixed together with the connecting through hole of the cross bar. The hyperspectral imager is mounted on the vertical rod through a hyperspectral imager connecting sleeve. The upper end of the vertical rod is provided with an active synchronous pulley, and the lower end is provided with a driven synchronous pulley. Both ends of the synchronous belt are fixed on the hyperspectral imager connecting sleeve to form a ring. The synchronous belt passes around the active synchronous pulley and the driven synchronous pulley. A power cord extending along the extending direction of the synchronous belt is connected to the surface of the synchronous belt located on the outer side of the ring. The power cord includes an insulating outer The conductive sleeve and the conductive core wire in the insulating sleeve, the wires of the hyperspectral imager are connected with the power line to introduce power, the cross bar is also provided with a conductive needle aligned with the power line and a conductive needle driving cylinder driving the conductive needle to move toward the power line to pierce the insulating sleeve and then connect with the conductive core wire, the conductive needle is connected with the power supply through the power supply lead-in line; when in use, when the hyperspectral imager moves to a set height position, the conductive cylinder drives the conductive needle to pierce the insulating sleeve and connect with the conductive core wire, so that the power supply is connected to the hyperspectral imager for power supply.

5. According to the soil profile spectral image acquisition method of claim 4, It is characterized in that The vertical rod is connected to a knife seat, which is provided with a limiting through hole, in which the synchronous belt is passed, and the knife seat is provided with a conductive needle guide through hole connected to the limiting through hole, and the conductive needle is passed through the electric needle guide through hole with the needle tip facing the power cord.

6. A soil profile spectral image acquisition method according to claim 5, It is characterized in that The extending direction of the conductive needle is the same as the distribution direction of the synchronous belt and the power cord.

7. A soil profile spectral image acquisition method according to claim 4, It is characterized in that A positioning convex ring is provided at the upper end of the connecting through hole of the crossbar portion, and the positioning convex ring is passed through the driven gear. The driven gear is meshed with the driving gear, and the driving gear is connected to the driving gear driving motor. The whiteboard is connected to the driven gear through a connecting rod. A reference frame is provided on one side of the whiteboard. When the whiteboard moves to be located directly in front of the hyperspectral imager, the reference frame is located on the side of the whiteboard away from the hyperspectral imager, and the synchronous belt is passed through the driving gear. When in use, the driving gear drives the gear to rotate until the whiteboard is located directly in front of the hyperspectral imager until the reference frame abuts against the vertical surface of the ditch to be collected, and the spectral whiteboard is corrected. After the spectral whiteboard correction is completed, the driving gear drives the gear to rotate until the whiteboard is staggered with the hyperspectral imager, and then collection is carried out.

8. A soil profile spectral image acquisition method according to claim 1, 2 or 3, It is characterized in that It also includes a mobile water shield and a propulsion structure connected to the collection vehicle and driving the mobile water shield to move together with the collection vehicle. The hyperspectral imager and the whiteboard are both located in the hyperspectral imager connection sleeve. The mobile water shield includes a bottom plate and a front side plate, a right side plate and a rear side plate connected to the bottom plate. The bottom plate, the front side plate, the right side plate and the rear side plate form a sealed shell. The hyperspectral imager faces the left side of the mobile water shield. The left side of the mobile water shield is an open structure. The left end of the front side plate is provided with a front vertical shovel strip extending vertically with a cutting edge facing forward, and the left end of the rear side plate is provided with a rear vertical shovel strip extending vertically with a cutting edge facing forward. Vertical shovel bar, the rear vertical shovel bar extends to the left beyond the front vertical shovel bar, a plurality of right side plate support rollers are provided on the outside of the right side wall, the right side plate support rollers extend in the up-down direction, the distance between the support plane determined by the right side plate support rollers and the surface of the front vertical shovel bar away from the ditch side is greater than the width of the ditch, and a plurality of bottom plate support rollers extending in the left-right direction and distributed in the front-back direction are provided on the lower surface of the bottom plate; when in use, the mobile water retaining cover is located in the ditch, and the water in the ditch is drained, at this time, the mobile water retaining cover is moved, and the mobile water retaining cover is inserted into the soil body through the front vertical shovel bar and the rear vertical shovel and cuts off the land to achieve sealing.

9. A soil profile spectral image acquisition method according to claim 8, It is characterized in that An isolation plate is provided in the mobile water retaining cover, which isolates the mobile water retaining cover into a front cavity and a rear cavity. The hyperspectral imager and the whiteboard are both located in the front bin, and a conveyor belt is provided in the rear bin for outputting the soil shoveled by the rear vertical shovel bar to the outside of the mobile water retaining cover. The conveyor belt includes a driven pulley rotatably connected to the lower end of the left side of the rear bin, a driving pulley rotatably connected to the outside of the mobile water retaining cover, a flat belt connecting the driven pulley and the driving pulley, and a conveying motor driving the driving pulley to rotate, the driven pulley extends in the front-to-back direction, the flat belt is connected end to end to form a ring, and a plurality of soil retaining plates distributed along the circumference of the flat belt are provided on the outer peripheral surface of the flat belt to prevent soil from sliding down from the flat belt, and the surface determined by the driving pulley and the driven pulley is an inclined surface.

10. A soil profile spectral image acquisition method according to claim 9, It is characterized in that The retaining plate is connected to the outer peripheral surface of the flat belt through a connecting seat, and the connecting seat is hinged with the retaining plate through a hinge shaft along the front-to-back direction. A limit block is provided on the connecting seat, and the limit block and the retaining plate are distributed from back to front along the rotation direction of the conveyor belt. When the retaining plate is located above the flat belt, the flat belt abuts against the limit block and maintains standing on the flat belt. When the retaining plate is located below the flat belt, the flat belt rotates to a vertical state under the action of gravity.

Images