Unmanned aerial vehicle double-point water sample collection system

Abstract

The application discloses a UAV double-point water sample collection system and relates to the technical field of flight lifebuoy. The UAV double-point water sample collection system comprises a UAV body and a sampling unit installed below the UAV body, a fixing frame is arranged below the UAV body, the sampling unit comprises a sampling barrel installed in the fixing frame, the sampling barrel specifically comprises an outer barrel and an inner barrel designed coaxially, the outer barrel and the inner barrel can be used for collecting water samples at different points respectively, double-point water sample collection and storage are realized, and the sampling efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of flying lifebuoy technology, specifically to a dual-point water sampling system for unmanned aerial vehicles (UAVs). Background Technology

[0002] Traditional manual water sampling is constrained by terrain and water conditions, resulting in limited monitoring range, low efficiency, and safety risks. While drone sampling technology can overcome terrain limitations and enable flexible operation, existing systems generally use a single sampling bucket design, allowing only one water sample to be collected per flight. When multiple sampling points and depths are required, the drone must make multiple round trips, significantly increasing operation time and energy consumption, with limited improvement in sampling efficiency.

[0003] Existing technologies have significant bottlenecks: First, the sampling capacity of a single tank is severely insufficient. For example, the system described in Chinese patent CN104458329A, although it achieves automatic fixed-point sampling of the water surface by UAV, can only acquire a single sample at a time. Second, increasing the number of devices to improve sampling capacity (such as the multi-sampling tank solution adopted in CN 105510082A) introduces multiple motors and control systems, significantly increasing the UAV's load, shortening its flight time, and creating a contradictory cycle of "efficiency improvement - increased load - performance degradation". Summary of the Invention

[0004] To address the aforementioned technical shortcomings, the present invention aims to provide a dual-point water sampling system for unmanned aerial vehicles (UAVs).

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a dual-point water sampling system for unmanned aerial vehicles (UAVs), including the UAV body, Mounting bracket: Located on the underside of the drone body; Sampling unit: includes a coaxial outer barrel and an inner barrel. The outer barrel is installed in a fixed frame. The lower end of the outer barrel is provided with an external water inlet and outlet. The inner barrel is vertically slidable. A partition is provided in the inner barrel. An internal water inlet and outlet are preset on the partition. The upper and lower sides of the partition form a sampling area and a buffer area. A water inlet is preset on the side wall of the inner barrel in the buffer area. An outer cover plate for closing the external water inlet and outlet is provided in the outer barrel. An inner cover plate for closing the internal water inlet and outlet is provided in the sampling area. Lifting unit: used to control the vertical movement of the inner tub; Valve unit: includes control component one for limiting the floating of the outer cover plate and control component two for controlling the opening and closing of the water inlet.

[0006] Preferably, the control component includes a passive magnetic ring slidably fitted inside the outer barrel and an active magnetic ring disposed in the inner barrel. A stop bar is provided on the outer side of the passive magnetic ring, and the stop bar is located above the outer cover plate.

[0007] Preferably, the lifting unit includes a fixing ring disposed on the outside of the inner tub and a support ring disposed on the outside of the outer tub, with the support ring located below the fixing ring.

[0008] Preferably, the lifting unit further includes a passive magnetic ring two disposed on the outside of the inner tub, an active magnetic ring two disposed on the inside of the outer tub, and an active magnetic ring three disposed on the outside of the outer tub. The active magnetic ring two attracts the active magnetic ring three through the outer tub. The active magnetic ring three is attracted and cooperates with the passive magnetic ring two. The active magnetic ring two is provided with a buoyancy ring. When the buoyancy ring moves upward due to buoyancy, the second and third active magnetic rings move upward synchronously.

[0009] Preferably, a counterweight is provided in the buffer area.

[0010] Preferably, a water inlet is provided with a water pipe, and a sealing cap is hinged to the upper side of the water pipe.

[0011] Preferably, the sealing cap has a pre-set elastic sealing ring on the side facing the water inlet.

[0012] Preferably, the sealing cap has a guide slope on the side opposite to the water inlet of the bucket, and the guide slope slides against the lower end of the outer bucket.

[0013] Preferably, both the outer and inner tubs are provided with vents at their upper ends. The beneficial effects of this invention are as follows: Achieve dual-point water sample collection.

[0014] Ensure water sample isolation during the dual-site collection process to guarantee the accuracy of subsequent water sample analysis. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the UAV dual-point water sampling system provided in an embodiment of the present invention.

[0017] Figure 2 This is used to demonstrate the top structure of the sampling unit.

[0018] Figure 3 This is used to demonstrate the bottom structure of the sampling unit.

[0019] Figure 4This is used to demonstrate the internal structure of the sampling unit.

[0020] Explanation of reference numerals in the attached drawings: 1. UAV body; 2. Mounting frame; 3. Sampling unit; 31. Exhaust port; 4. Outer barrel; 41. Outer water inlet / outlet; 42. Outer cover plate; 5. Inner barrel; 51. Partition plate; 511. Inner water inlet / outlet; 52. Buffer area; 53. Sampling area; 54. Inner cover plate; 61. Fixing ring; 62. Support ring; 63. Buoyancy ring; 64. Active magnetic ring two; 65. Active magnetic ring three; 66. Passive magnetic ring two; 71. Control component one; 711. Passive magnetic ring one; 712. Active magnetic ring one; 713. Baffle bar; 72. Control component two; 721. Water pipe; 722. Sealing cover. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Figure 1-4 As shown, the present invention provides a dual-point water sampling system for unmanned aerial vehicles (UAVs), including a UAV body 1 and a sampling unit 3 installed below it. A fixed frame 2 is pre-set below the UAV body 1, and the sampling unit 3 includes a sampling bucket installed in the fixed frame 2. The sampling bucket specifically includes an outer bucket 4 and an inner bucket 5 designed coaxially. The outer bucket 4 and the inner bucket 5 can be used to collect water samples from different points, realizing dual-point water sampling and storage, which greatly improves sampling efficiency.

[0023] The outer bucket 4 is detachably and fixedly installed in the fixing frame 2, while the inner bucket 5 is slidably installed inside the outer bucket 4. During water sample collection, the outer bucket 4 is used for water sample collection first. An exhaust port 31 is preset at the top of the outer bucket 4, and an external water inlet / outlet 41 is preset at the bottom of the outer bucket 4. An outer cover plate 42 is preset inside the outer bucket 4. The outer cover plate 42 has a ring structure and can completely cover the external water inlet / outlet 41. When water sample enters the outer bucket 4, the water pushes the outer cover plate 42 open and enters the outer bucket 4. When the outer bucket 4 is removed from the water sample, the outer cover plate 42 falls back and seals the external water inlet / outlet 41.

[0024] The water sampling structures of the inner bucket 5 and the outer bucket 4 are different. A partition 51 is preset in the inner bucket 5 near its bottom. The sampling area 53 is above the partition 51, and the buffer area 52 is below the partition 51. An inner inlet / outlet 511 is preset on the partition 51, which connects the sampling area 53 and the buffer area 52. At the same time, an inner cover 54 is preset in the sampling area 53. The inner cover 54 can seal and isolate the sampling area 53 and the buffer area 52 by the inner inlet / outlet 511. A water inlet is preset on the side wall of the inner bucket 5 located in the buffer area 52. When water sample enters the inner bucket 5 and the water inlet is opened, the water first enters the buffer area 52 and then pushes open the inner cover 54 to enter the sampling area 53. When the inner bucket 5 is removed from the water sample, the inner cover 54 falls back and seals the inner inlet / outlet 511.

[0025] To ensure sampling stability, the inner tank 5 must remain closed when the outer tank 4 is sampling, and vice versa. A valve unit is designed for this purpose, comprising a control component 71 for limiting the floating of the outer cover plate 42 and a control component 72 for controlling the opening and closing of the water inlet.

[0026] The control component 71 includes a passive magnetic ring 711 coaxially mounted in the outer barrel 4 and a baffle 713 fixed to the passive magnetic ring 711. An active magnetic ring 712 is coaxially fixed on the outside of the inner barrel 5. The active magnetic ring 712 and the passive magnetic ring 711 are mutually attracted. When the outer barrel 4 is sampling, the baffle 713 is higher than the outer cover plate 42 and a short distance away. When the water sample enters the outer barrel 4, the water can normally push up the outer cover plate 42 and enter the outer barrel 4. When the inner barrel 5 is sampling, the inner barrel 5 is controlled to move downward a short distance relative to the outer barrel 4. At this time, the active magnetic ring 712 drives the passive magnetic ring 711 to move downward synchronously through magnetic force. That is, the baffle 713 also moves downward and squeezes the outer cover plate 42. Therefore, when the inner barrel 5 is sampling, although the outer barrel 4 will also enter the water sample, the outer cover plate 42 seals the outer inlet and outlet 41 to prevent other water samples from entering the outer barrel 4.

[0027] Control component 2 72 includes a water inlet pipe 721 located at the water inlet of the inner tub 5 and a sealing cap 722 hinged to the water inlet pipe 721. The hinged end of the sealing cap 722 is provided with a torsion spring, which drives the sealing cap 722 to rotate away from the water inlet pipe 721. At the same time, a guide block is provided on the side of the sealing cap 722 away from the water inlet pipe 721, and a guide slope is provided on the guide block. Before the outer tub 4 takes samples, the lower edge of the outer tub 4 abuts against the guide slope on the guide block, so that the sealing cap 722 blocks the water inlet pipe 721. The sealing cap 722 is fixed with an elastic sealing ring, which presses against the water inlet pipe 721 to ensure the sealing performance of the sealing cap 722 to the water inlet pipe 721. When the inner tub 5 moves downward relative to the outer tub 4, the sealing cap 722 is driven by the torsion spring to rotate upward, unlocking the sealing cap 722 from the water inlet pipe 721, thus satisfying the sampling requirement of the inner tub 5.

[0028] The key to sampling by switching between the outer tub 4 and the inner tub 5 is to control the lifting and lowering of the inner tub 5. The lifting and lowering of the inner tub 5 is controlled by designing a lifting unit. The lifting unit mainly includes a passive magnetic ring 66 fixed on the outside of the inner tub 5, an active magnetic ring 64 slidably sleeved on the inside and outside of the outer tub 4, and an active magnetic ring 65. The active magnetic ring 64 and the active magnetic ring 65 are attracted to each other by a layer of the side wall of the outer tub 4. The active magnetic ring 65 is attracted to the passive magnetic ring 66. In addition, a buoyancy ring 63 is fixedly covered on the active magnetic ring 64. When the drone takes off for the first time, both the outer barrel 4 and the inner barrel 5 are empty. The outer barrel 4 and the inner barrel 5 are kept relatively fixed by the adsorption between the active magnetic ring 3 65 and the passive magnetic ring 2 66. That is, at this time, the outer barrel 4 is in the sampling state while the inner barrel 5 is in the closed non-sampling state. When the second active magnetic ring 64 moves upward, it simultaneously drives the third active magnetic ring 65 upward, and the abutment between the outer tub 4 and the sealing cover 722 restricts the upward movement of the inner tub 5, the third active magnetic ring 65 separates from the second active magnetic ring 64, thus unlocking the downward movement of the inner tub 5.

[0029] To further ensure the stability of sampling, vents 31 are pre-installed at the top of the outer barrel 4 and the inner barrel 5. When water samples enter the bottom of the outer barrel 4 and the inner barrel 5, the gas inside the barrels is discharged from the vents 31 at the top. In addition, a counterweight is pre-installed in the buffer zone 52 of the inner barrel 5. The gravity of the counterweight ensures that the inner barrel 5 can sink in the water sample and enter the water body through the water pipe 721.

[0030] The working principle of this invention is: Prepare: The outer barrel 4 is installed in the fixed frame 2 below the drone body 1, and the inner barrel 5 is located in the outer barrel 4. At this time, the active magnetic ring 3 65 and the passive magnetic ring 2 66 are magnetically fixed together, and the bottom of the outer barrel 4 abuts against the sealing cap 722 at the water pipe 721 on the inner barrel 5.

[0031] First sampling: The drone carries the sampling unit 3 to the first water sampling point. The outer bucket 4 and the inner bucket 5 enter the water sample together. At this time, the inner bucket 5 is in a sealed state, so that the inner bucket 5 is always under buoyancy during the entire first sampling process. The water pushes open the outer cover plate 42 and enters the outer bucket 4. As the water level in the outer bucket 4 gradually rises, the buoyancy ring 63 floats upward, that is, the active magnetic ring 2 64 and the active magnetic ring 3 65 move upward. And because the abutting fit between the outer bucket 4 and the sealing cover 722 restricts the upward movement of the inner bucket 5, the active magnetic ring 3 65 and the passive magnetic ring 2 66 separate. After the sampling is completed, the drone drives the sampling unit 3 to rise.

[0032] Second sampling: At the end of the first sampling, as the drone lifts sampling unit 3, the active magnetic ring 3 65 separates from the passive magnetic ring 2 66. At this point, the inner bucket 5 moves downwards under gravity until the support ring 62 and the fixing ring 61 on the inner bucket 5 come into contact, and the sealing cover 722 rotates to open the water pipe 721. Simultaneously, the active magnetic ring 1 712 on the inner bucket 5 attracts the passive magnetic ring 1 711 downwards, causing the stop bar 713 to press against the upper side of the outer cover plate 42. The pre-set elastic sealing ring on the lower side of the outer cover plate 42 cooperates to seal the outer bucket 4. Then, the drone lifts sampling unit 3 to the second water sampling point and descends. The outer bucket 4 and its contents enter the water sample. At this point, water cannot enter the outer bucket 4 but instead flows through the water pipe 721 into the buffer area 52 and the sampling area 53. After the second sampling is completed, the drone lifts sampling unit 3 back. The above description is merely 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 foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dual-point water sampling system for unmanned aerial vehicles (UAVs), comprising the UAV body (1), characterized in that, Also includes: Mounting bracket (2): Located on the underside of the UAV body (1); Sampling unit (3): includes an outer barrel (4) and an inner barrel (5) on the same axis. The outer barrel (4) is installed in a fixed frame (2). An external water inlet / outlet (41) is provided at the lower end of the outer barrel (4). The inner barrel (5) is slidably arranged in the vertical direction. A partition (51) is provided in the inner barrel (5). An internal water inlet / outlet (511) is preset on the partition (51). A sampling area (53) and a buffer area (52) are formed on the upper and lower sides of the partition (51). A water inlet is preset on the side wall of the inner barrel (5) at the buffer area (52). An outer cover plate (42) for closing the external water inlet / outlet (41) is provided in the outer barrel (4). An inner cover plate (54) for closing the internal water inlet / outlet (511) is provided in the sampling area (53). Lifting unit: used to control the vertical movement of the inner tub (5); Valve unit: includes control component one (71) for limiting the floating of the outer cover plate (42) and control component two (72) for controlling the opening and closing of the water inlet; The control component 1 (71) includes a passive magnetic ring 1 (711) slidably sleeved inside the outer barrel (4) and an active magnetic ring 1 (712) disposed in the inner barrel (5). A stop bar (713) is provided on the outside of the passive magnetic ring 1 (711), and the stop bar (713) is located above the outer cover plate (42). The lifting unit includes a fixing ring (61) disposed on the outside of the inner tub (5) and a support ring (62) disposed on the outside of the outer tub (4), wherein the support ring (62) is located below the fixing ring (61); The lifting unit also includes a passive magnetic ring two (66) disposed on the outside of the inner barrel (5), an active magnetic ring two (64) disposed on the inside of the outer barrel (4), and an active magnetic ring three (65) disposed on the outside of the outer barrel (4). The active magnetic ring two (64) adsorbs the active magnetic ring three (65) through the outer barrel (4). The active magnetic ring three (65) and the passive magnetic ring two (66) are attracted to each other. A buoyancy ring (63) is provided on the active magnetic ring two (64). When the buoyancy ring (63) moves upward due to buoyancy, the active magnetic ring two (64) and the active magnetic ring three (65) move upward synchronously.

2. The UAV dual-point water sampling system as described in claim 1, characterized in that, The buffer area (52) is equipped with a counterweight block.

3. The UAV dual-point water sampling system as described in claim 1, characterized in that, A water inlet is provided with a water pipe (721), and a sealing cap (722) is hinged to the upper side of the water pipe (721).

4. The UAV dual-point water sampling system as described in claim 3, characterized in that, The sealing cap (722) has a pre-set elastic sealing ring on the side facing the water inlet.

5. The UAV dual-point water sampling system as described in claim 4, characterized in that, The sealing cap (722) has a guide slope on the side away from the water inlet of the bucket, and the guide slope slides against the lower end of the outer bucket (4).

6. The UAV dual-point water sampling system as described in claim 1, characterized in that, Both the outer barrel (4) and the inner barrel (5) are provided with exhaust ports (31) at their upper ends.

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